Merge tag 'drm-next-2019-09-18' of git://anongit.freedesktop.org/drm/drm

Pull drm updates from Dave Airlie:
 "This is the main pull request for 5.4-rc1 merge window. I don't think
  there is anything outstanding so next week should just be fixes, but
  we'll see if I missed anything. I landed some fixes earlier in the
  week but got delayed writing summary and sending it out, due to a mix
  of sick kid and jetlag!

  There are some fixes pending, but I'd rather get the main merge out of
  the way instead of delaying it longer.

  It's also pretty large in commit count and new amd header file size.
  The largest thing is four new amdgpu products (navi12/14, arcturus and
  renoir APU support).

  Otherwise it's pretty much lots of work across the board, i915 has
  started landing tigerlake support, lots of icelake fixes and lots of
  locking reworking for future gpu support, lots of header file rework
  (drmP.h is nearly gone), some old legacy hacks (DRM_WAIT_ON) have been
  put into the places they are needed.

  uapi:
   - content protection type property for HDCP

  core:
   - rework include dependencies
   - lots of drmP.h removals
   - link rate calculation robustness fix
   - make fb helper map only when required
   - add connector->DDC adapter link
   - DRM_WAIT_ON removed
   - drop DRM_AUTH usage from drivers

  dma-buf:
   - reservation object fence helper

  dma-fence:
   - shrink dma_fence struct
   - merge signal functions
   - store timestamps in dma_fence
   - selftests

  ttm:
   - embed drm_get_object struct into ttm_buffer_object
   - release_notify callback

  bridges:
   - sii902x - audio graph card support
   - tc358767 - aux data handling rework
   - ti-snd64dsi86 - debugfs support, DSI mode flags support

  panels:
   - Support for GiantPlus GPM940B0, Sharp LQ070Y3DG3B, Ortustech
     COM37H3M, Novatek NT39016, Sharp LS020B1DD01D, Raydium RM67191, Boe
     Himax8279d, Sharp LD-D5116Z01B
   - TI nspire, NEC NL8048HL11, LG Philips LB035Q02, Sharp LS037V7DW01,
     Sony ACX565AKM, Toppoly TD028TTEC1 Toppoly TD043MTEA1

  i915:
   - Initial tigerlake platform support
   - Locking simplification work, general all over refactoring.
   - Selftests
   - HDCP debug info improvements
   - DSI properties
   - Icelake display PLL fixes, colorspace fixes, bandwidth fixes, DSI
     suspend/resume
   - GuC fixes
   - Perf fixes
   - ElkhartLake enablement
   - DP MST fixes
   - GVT - command parser enhancements

  amdgpu:
   - add wipe memory on release flag for buffer creation
   - Navi12/14 support (may be marked experimental)
   - Arcturus support
   - Renoir APU support
   - mclk DPM for Navi
   - DC display fixes
   - Raven scatter/gather support
   - RAS support for GFX
   - Navi12 + Arcturus power features
   - GPU reset for Picasso
   - smu11 i2c controller support

  amdkfd:
   - navi12/14 support
   - Arcturus support

  radeon:
   - kexec fix

  nouveau:
   - improved display color management
   - detect lack of GPU power cables

  vmwgfx:
   - evicition priority support
   - remove unused security feature

  msm:
   - msm8998 display support
   - better async commit support for cursor updates

  etnaviv:
   - per-process address space support
   - performance counter fixes
   - softpin support

  mcde:
   - DCS transfers fix

  exynos:
   - drmP.h cleanup

  lima:
   - reduce logging

  kirin:
   - misc clenaups

  komeda:
   - dual-link support
   - DT memory regions

  hisilicon:
   - misc fixes

  imx:
   - IPUv3 image converter fixes
   - 32-bit RGB V4L2 pixel format support

  ingenic:
   - more support for panel related cases

  mgag200:
   - cursor support fix

  panfrost:
   - export GPU features register to userspace
   - gpu heap allocations
   - per-fd address space support

  pl111:
   - CLD pads wiring support removed from DT

  rockchip:
   - rework to use DRM PSR helpers
   - fix bug in VOP_WIN_GET macro
   - DSI DT binding rework

  sun4i:
   - improve support for color encoding and range
   - DDC enabled GPIO

  tinydrm:
   - rework SPI support
   - improve MIPI-DBI support
   - moved to drm/tiny

  vkms:
   - rework CRC tracking

  dw-hdmi:
   - get_eld and i2s improvements

  gm12u320:
   - misc fixes

  meson:
   - global code cleanup
   - vpu feature detect

  omap:
   - alpha/pixel blend mode properties

  rcar-du:
   - misc fixes"

* tag 'drm-next-2019-09-18' of git://anongit.freedesktop.org/drm/drm: (2112 commits)
  drm/nouveau/bar/gm20b: Avoid BAR1 teardown during init
  drm/nouveau: Fix ordering between TTM and GEM release
  drm/nouveau/prime: Extend DMA reservation object lock
  drm/nouveau: Fix fallout from reservation object rework
  drm/nouveau/kms/nv50-: Don't create MSTMs for eDP connectors
  drm/i915: Use NOEVICT for first pass on attemping to pin a GGTT mmap
  drm/i915: to make vgpu ppgtt notificaiton as atomic operation
  drm/i915: Flush the existing fence before GGTT read/write
  drm/i915: Hold irq-off for the entire fake lock period
  drm/i915/gvt: update RING_START reg of vGPU when the context is submitted to i915
  drm/i915/gvt: update vgpu workload head pointer correctly
  drm/mcde: Fix DSI transfers
  drm/msm: Use the correct dma_sync calls harder
  drm/msm: remove unlikely() from WARN_ON() conditions
  drm/msm/dsi: Fix return value check for clk_get_parent
  drm/msm: add atomic traces
  drm/msm/dpu: async commit support
  drm/msm: async commit support
  drm/msm: split power control from prepare/complete_commit
  drm/msm: add kms->flush_commit()
  ...

10 files changed, 4131 insertions, 0 deletions

diff --git a/drivers/gpu/drm/tiny/Kconfig b/drivers/gpu/drm/tiny/Kconfig
new file mode 100644
index 000000000000..504763423d46
--- /dev/null
+++ b/drivers/gpu/drm/tiny/Kconfig
@@ -0,0 +1,99 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+config DRM_GM12U320
+	tristate "GM12U320 driver for USB projectors"
+	depends on DRM && USB
+	select DRM_KMS_HELPER
+	select DRM_GEM_SHMEM_HELPER
+	help
+	 This is a KMS driver for projectors which use the GM12U320 chipset
+	 for video transfer over USB2/3, such as the Acer C120 mini projector.
+
+config TINYDRM_HX8357D
+	tristate "DRM support for HX8357D display panels"
+	depends on DRM && SPI
+	select DRM_KMS_HELPER
+	select DRM_KMS_CMA_HELPER
+	select DRM_MIPI_DBI
+	select BACKLIGHT_CLASS_DEVICE
+	help
+	  DRM driver for the following HX8357D panels:
+	  * YX350HV15-T 3.5" 340x350 TFT (Adafruit 3.5")
+
+	  If M is selected the module will be called hx8357d.
+
+config TINYDRM_ILI9225
+	tristate "DRM support for ILI9225 display panels"
+	depends on DRM && SPI
+	select DRM_KMS_HELPER
+	select DRM_KMS_CMA_HELPER
+	select DRM_MIPI_DBI
+	help
+	  DRM driver for the following Ilitek ILI9225 panels:
+	  * No-name 2.2" color screen module
+
+	  If M is selected the module will be called ili9225.
+
+config TINYDRM_ILI9341
+	tristate "DRM support for ILI9341 display panels"
+	depends on DRM && SPI
+	select DRM_KMS_HELPER
+	select DRM_KMS_CMA_HELPER
+	select DRM_MIPI_DBI
+	select BACKLIGHT_CLASS_DEVICE
+	help
+	  DRM driver for the following Ilitek ILI9341 panels:
+	  * YX240QV29-T 2.4" 240x320 TFT (Adafruit 2.4")
+
+	  If M is selected the module will be called ili9341.
+
+config TINYDRM_MI0283QT
+	tristate "DRM support for MI0283QT"
+	depends on DRM && SPI
+	select DRM_KMS_HELPER
+	select DRM_KMS_CMA_HELPER
+	select DRM_MIPI_DBI
+	select BACKLIGHT_CLASS_DEVICE
+	help
+	  DRM driver for the Multi-Inno MI0283QT display panel
+	  If M is selected the module will be called mi0283qt.
+
+config TINYDRM_REPAPER
+	tristate "DRM support for Pervasive Displays RePaper panels (V231)"
+	depends on DRM && SPI
+	select DRM_KMS_HELPER
+	select DRM_KMS_CMA_HELPER
+	depends on THERMAL || !THERMAL
+	help
+	  DRM driver for the following Pervasive Displays panels:
+	  1.44" TFT EPD Panel (E1144CS021)
+	  1.90" TFT EPD Panel (E1190CS021)
+	  2.00" TFT EPD Panel (E2200CS021)
+	  2.71" TFT EPD Panel (E2271CS021)
+
+	  If M is selected the module will be called repaper.
+
+config TINYDRM_ST7586
+	tristate "DRM support for Sitronix ST7586 display panels"
+	depends on DRM && SPI
+	select DRM_KMS_HELPER
+	select DRM_KMS_CMA_HELPER
+	select DRM_MIPI_DBI
+	help
+	  DRM driver for the following Sitronix ST7586 panels:
+	  * LEGO MINDSTORMS EV3
+
+	  If M is selected the module will be called st7586.
+
+config TINYDRM_ST7735R
+	tristate "DRM support for Sitronix ST7735R display panels"
+	depends on DRM && SPI
+	select DRM_KMS_HELPER
+	select DRM_KMS_CMA_HELPER
+	select DRM_MIPI_DBI
+	select BACKLIGHT_CLASS_DEVICE
+	help
+	  DRM driver Sitronix ST7735R with one of the following LCDs:
+	  * JD-T18003-T01 1.8" 128x160 TFT
+
+	  If M is selected the module will be called st7735r.
diff --git a/drivers/gpu/drm/tiny/Makefile b/drivers/gpu/drm/tiny/Makefile
new file mode 100644
index 000000000000..896cf31132d3
--- /dev/null
+++ b/drivers/gpu/drm/tiny/Makefile
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+obj-$(CONFIG_DRM_GM12U320)		+= gm12u320.o
+obj-$(CONFIG_TINYDRM_HX8357D)		+= hx8357d.o
+obj-$(CONFIG_TINYDRM_ILI9225)		+= ili9225.o
+obj-$(CONFIG_TINYDRM_ILI9341)		+= ili9341.o
+obj-$(CONFIG_TINYDRM_MI0283QT)		+= mi0283qt.o
+obj-$(CONFIG_TINYDRM_REPAPER)		+= repaper.o
+obj-$(CONFIG_TINYDRM_ST7586)		+= st7586.o
+obj-$(CONFIG_TINYDRM_ST7735R)		+= st7735r.o
diff --git a/drivers/gpu/drm/tiny/gm12u320.c b/drivers/gpu/drm/tiny/gm12u320.c
new file mode 100644
index 000000000000..03d0e2df6774
--- /dev/null
+++ b/drivers/gpu/drm/tiny/gm12u320.c
@@ -0,0 +1,804 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2019 Hans de Goede <hdegoede@redhat.com>
+ */
+
+#include <linux/dma-buf.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_atomic_state_helper.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_damage_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_file.h>
+#include <drm/drm_format_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_gem_shmem_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_ioctl.h>
+#include <drm/drm_modeset_helper_vtables.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+#include <drm/drm_vblank.h>
+
+static bool eco_mode;
+module_param(eco_mode, bool, 0644);
+MODULE_PARM_DESC(eco_mode, "Turn on Eco mode (less bright, more silent)");
+
+#define DRIVER_NAME		"gm12u320"
+#define DRIVER_DESC		"Grain Media GM12U320 USB projector display"
+#define DRIVER_DATE		"2019"
+#define DRIVER_MAJOR		1
+#define DRIVER_MINOR		0
+
+/*
+ * The DLP has an actual width of 854 pixels, but that is not a multiple
+ * of 8, breaking things left and right, so we export a width of 848.
+ */
+#define GM12U320_USER_WIDTH		848
+#define GM12U320_REAL_WIDTH		854
+#define GM12U320_HEIGHT			480
+
+#define GM12U320_BLOCK_COUNT		20
+
+#define GM12U320_ERR(fmt, ...) \
+	DRM_DEV_ERROR(&gm12u320->udev->dev, fmt, ##__VA_ARGS__)
+
+#define MISC_RCV_EPT			1
+#define DATA_RCV_EPT			2
+#define DATA_SND_EPT			3
+#define MISC_SND_EPT			4
+
+#define DATA_BLOCK_HEADER_SIZE		84
+#define DATA_BLOCK_CONTENT_SIZE		64512
+#define DATA_BLOCK_FOOTER_SIZE		20
+#define DATA_BLOCK_SIZE			(DATA_BLOCK_HEADER_SIZE + \
+					 DATA_BLOCK_CONTENT_SIZE + \
+					 DATA_BLOCK_FOOTER_SIZE)
+#define DATA_LAST_BLOCK_CONTENT_SIZE	4032
+#define DATA_LAST_BLOCK_SIZE		(DATA_BLOCK_HEADER_SIZE + \
+					 DATA_LAST_BLOCK_CONTENT_SIZE + \
+					 DATA_BLOCK_FOOTER_SIZE)
+
+#define CMD_SIZE			31
+#define READ_STATUS_SIZE		13
+#define MISC_VALUE_SIZE			4
+
+#define CMD_TIMEOUT			msecs_to_jiffies(200)
+#define DATA_TIMEOUT			msecs_to_jiffies(1000)
+#define IDLE_TIMEOUT			msecs_to_jiffies(2000)
+#define FIRST_FRAME_TIMEOUT		msecs_to_jiffies(2000)
+
+#define MISC_REQ_GET_SET_ECO_A		0xff
+#define MISC_REQ_GET_SET_ECO_B		0x35
+/* Windows driver does once every second, with arg d = 1, other args 0 */
+#define MISC_REQ_UNKNOWN1_A		0xff
+#define MISC_REQ_UNKNOWN1_B		0x38
+/* Windows driver does this on init, with arg a, b = 0, c = 0xa0, d = 4 */
+#define MISC_REQ_UNKNOWN2_A		0xa5
+#define MISC_REQ_UNKNOWN2_B		0x00
+
+struct gm12u320_device {
+	struct drm_device	         dev;
+	struct drm_simple_display_pipe   pipe;
+	struct drm_connector	         conn;
+	struct usb_device               *udev;
+	unsigned char                   *cmd_buf;
+	unsigned char                   *data_buf[GM12U320_BLOCK_COUNT];
+	bool                             pipe_enabled;
+	struct {
+		bool                     run;
+		struct workqueue_struct *workq;
+		struct work_struct       work;
+		wait_queue_head_t        waitq;
+		struct mutex             lock;
+		struct drm_framebuffer  *fb;
+		struct drm_rect          rect;
+	} fb_update;
+};
+
+static const char cmd_data[CMD_SIZE] = {
+	0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00,
+	0x68, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x10, 0xff,
+	0x00, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x80, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+static const char cmd_draw[CMD_SIZE] = {
+	0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0xfe,
+	0x00, 0x00, 0x00, 0xc0, 0xd1, 0x05, 0x00, 0x40,
+	0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+static const char cmd_misc[CMD_SIZE] = {
+	0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00,
+	0x04, 0x00, 0x00, 0x00, 0x80, 0x01, 0x10, 0xfd,
+	0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+static const char data_block_header[DATA_BLOCK_HEADER_SIZE] = {
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0xfb, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x04, 0x15, 0x00, 0x00, 0xfc, 0x00, 0x00,
+	0x01, 0x00, 0x00, 0xdb
+};
+
+static const char data_last_block_header[DATA_BLOCK_HEADER_SIZE] = {
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0xfb, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x2a, 0x00, 0x20, 0x00, 0xc0, 0x0f, 0x00, 0x00,
+	0x01, 0x00, 0x00, 0xd7
+};
+
+static const char data_block_footer[DATA_BLOCK_FOOTER_SIZE] = {
+	0xfb, 0x14, 0x02, 0x20, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x80, 0x00, 0x00, 0x4f
+};
+
+static int gm12u320_usb_alloc(struct gm12u320_device *gm12u320)
+{
+	int i, block_size;
+	const char *hdr;
+
+	gm12u320->cmd_buf = kmalloc(CMD_SIZE, GFP_KERNEL);
+	if (!gm12u320->cmd_buf)
+		return -ENOMEM;
+
+	for (i = 0; i < GM12U320_BLOCK_COUNT; i++) {
+		if (i == GM12U320_BLOCK_COUNT - 1) {
+			block_size = DATA_LAST_BLOCK_SIZE;
+			hdr = data_last_block_header;
+		} else {
+			block_size = DATA_BLOCK_SIZE;
+			hdr = data_block_header;
+		}
+
+		gm12u320->data_buf[i] = kzalloc(block_size, GFP_KERNEL);
+		if (!gm12u320->data_buf[i])
+			return -ENOMEM;
+
+		memcpy(gm12u320->data_buf[i], hdr, DATA_BLOCK_HEADER_SIZE);
+		memcpy(gm12u320->data_buf[i] +
+				(block_size - DATA_BLOCK_FOOTER_SIZE),
+		       data_block_footer, DATA_BLOCK_FOOTER_SIZE);
+	}
+
+	gm12u320->fb_update.workq = create_singlethread_workqueue(DRIVER_NAME);
+	if (!gm12u320->fb_update.workq)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static void gm12u320_usb_free(struct gm12u320_device *gm12u320)
+{
+	int i;
+
+	if (gm12u320->fb_update.workq)
+		destroy_workqueue(gm12u320->fb_update.workq);
+
+	for (i = 0; i < GM12U320_BLOCK_COUNT; i++)
+		kfree(gm12u320->data_buf[i]);
+
+	kfree(gm12u320->cmd_buf);
+}
+
+static int gm12u320_misc_request(struct gm12u320_device *gm12u320,
+				 u8 req_a, u8 req_b,
+				 u8 arg_a, u8 arg_b, u8 arg_c, u8 arg_d)
+{
+	int ret, len;
+
+	memcpy(gm12u320->cmd_buf, &cmd_misc, CMD_SIZE);
+	gm12u320->cmd_buf[20] = req_a;
+	gm12u320->cmd_buf[21] = req_b;
+	gm12u320->cmd_buf[22] = arg_a;
+	gm12u320->cmd_buf[23] = arg_b;
+	gm12u320->cmd_buf[24] = arg_c;
+	gm12u320->cmd_buf[25] = arg_d;
+
+	/* Send request */
+	ret = usb_bulk_msg(gm12u320->udev,
+			   usb_sndbulkpipe(gm12u320->udev, MISC_SND_EPT),
+			   gm12u320->cmd_buf, CMD_SIZE, &len, CMD_TIMEOUT);
+	if (ret || len != CMD_SIZE) {
+		GM12U320_ERR("Misc. req. error %d\n", ret);
+		return -EIO;
+	}
+
+	/* Read value */
+	ret = usb_bulk_msg(gm12u320->udev,
+			   usb_rcvbulkpipe(gm12u320->udev, MISC_RCV_EPT),
+			   gm12u320->cmd_buf, MISC_VALUE_SIZE, &len,
+			   DATA_TIMEOUT);
+	if (ret || len != MISC_VALUE_SIZE) {
+		GM12U320_ERR("Misc. value error %d\n", ret);
+		return -EIO;
+	}
+	/* cmd_buf[0] now contains the read value, which we don't use */
+
+	/* Read status */
+	ret = usb_bulk_msg(gm12u320->udev,
+			   usb_rcvbulkpipe(gm12u320->udev, MISC_RCV_EPT),
+			   gm12u320->cmd_buf, READ_STATUS_SIZE, &len,
+			   CMD_TIMEOUT);
+	if (ret || len != READ_STATUS_SIZE) {
+		GM12U320_ERR("Misc. status error %d\n", ret);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static void gm12u320_32bpp_to_24bpp_packed(u8 *dst, u8 *src, int len)
+{
+	while (len--) {
+		*dst++ = *src++;
+		*dst++ = *src++;
+		*dst++ = *src++;
+		src++;
+	}
+}
+
+static void gm12u320_copy_fb_to_blocks(struct gm12u320_device *gm12u320)
+{
+	int block, dst_offset, len, remain, ret, x1, x2, y1, y2;
+	struct drm_framebuffer *fb;
+	void *vaddr;
+	u8 *src;
+
+	mutex_lock(&gm12u320->fb_update.lock);
+
+	if (!gm12u320->fb_update.fb)
+		goto unlock;
+
+	fb = gm12u320->fb_update.fb;
+	x1 = gm12u320->fb_update.rect.x1;
+	x2 = gm12u320->fb_update.rect.x2;
+	y1 = gm12u320->fb_update.rect.y1;
+	y2 = gm12u320->fb_update.rect.y2;
+
+	vaddr = drm_gem_shmem_vmap(fb->obj[0]);
+	if (IS_ERR(vaddr)) {
+		GM12U320_ERR("failed to vmap fb: %ld\n", PTR_ERR(vaddr));
+		goto put_fb;
+	}
+
+	if (fb->obj[0]->import_attach) {
+		ret = dma_buf_begin_cpu_access(
+			fb->obj[0]->import_attach->dmabuf, DMA_FROM_DEVICE);
+		if (ret) {
+			GM12U320_ERR("dma_buf_begin_cpu_access err: %d\n", ret);
+			goto vunmap;
+		}
+	}
+
+	src = vaddr + y1 * fb->pitches[0] + x1 * 4;
+
+	x1 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2;
+	x2 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2;
+
+	for (; y1 < y2; y1++) {
+		remain = 0;
+		len = (x2 - x1) * 3;
+		dst_offset = (y1 * GM12U320_REAL_WIDTH + x1) * 3;
+		block = dst_offset / DATA_BLOCK_CONTENT_SIZE;
+		dst_offset %= DATA_BLOCK_CONTENT_SIZE;
+
+		if ((dst_offset + len) > DATA_BLOCK_CONTENT_SIZE) {
+			remain = dst_offset + len - DATA_BLOCK_CONTENT_SIZE;
+			len = DATA_BLOCK_CONTENT_SIZE - dst_offset;
+		}
+
+		dst_offset += DATA_BLOCK_HEADER_SIZE;
+		len /= 3;
+
+		gm12u320_32bpp_to_24bpp_packed(
+			gm12u320->data_buf[block] + dst_offset,
+			src, len);
+
+		if (remain) {
+			block++;
+			dst_offset = DATA_BLOCK_HEADER_SIZE;
+			gm12u320_32bpp_to_24bpp_packed(
+				gm12u320->data_buf[block] + dst_offset,
+				src + len * 4, remain / 3);
+		}
+		src += fb->pitches[0];
+	}
+
+	if (fb->obj[0]->import_attach) {
+		ret = dma_buf_end_cpu_access(fb->obj[0]->import_attach->dmabuf,
+					     DMA_FROM_DEVICE);
+		if (ret)
+			GM12U320_ERR("dma_buf_end_cpu_access err: %d\n", ret);
+	}
+vunmap:
+	drm_gem_shmem_vunmap(fb->obj[0], vaddr);
+put_fb:
+	drm_framebuffer_put(fb);
+	gm12u320->fb_update.fb = NULL;
+unlock:
+	mutex_unlock(&gm12u320->fb_update.lock);
+}
+
+static void gm12u320_fb_update_work(struct work_struct *work)
+{
+	struct gm12u320_device *gm12u320 =
+		container_of(work, struct gm12u320_device, fb_update.work);
+	int draw_status_timeout = FIRST_FRAME_TIMEOUT;
+	int block, block_size, len;
+	int frame = 0;
+	int ret = 0;
+
+	while (gm12u320->fb_update.run) {
+		gm12u320_copy_fb_to_blocks(gm12u320);
+
+		for (block = 0; block < GM12U320_BLOCK_COUNT; block++) {
+			if (block == GM12U320_BLOCK_COUNT - 1)
+				block_size = DATA_LAST_BLOCK_SIZE;
+			else
+				block_size = DATA_BLOCK_SIZE;
+
+			/* Send data command to device */
+			memcpy(gm12u320->cmd_buf, cmd_data, CMD_SIZE);
+			gm12u320->cmd_buf[8] = block_size & 0xff;
+			gm12u320->cmd_buf[9] = block_size >> 8;
+			gm12u320->cmd_buf[20] = 0xfc - block * 4;
+			gm12u320->cmd_buf[21] = block | (frame << 7);
+
+			ret = usb_bulk_msg(gm12u320->udev,
+				usb_sndbulkpipe(gm12u320->udev, DATA_SND_EPT),
+				gm12u320->cmd_buf, CMD_SIZE, &len,
+				CMD_TIMEOUT);
+			if (ret || len != CMD_SIZE)
+				goto err;
+
+			/* Send data block to device */
+			ret = usb_bulk_msg(gm12u320->udev,
+				usb_sndbulkpipe(gm12u320->udev, DATA_SND_EPT),
+				gm12u320->data_buf[block], block_size,
+				&len, DATA_TIMEOUT);
+			if (ret || len != block_size)
+				goto err;
+
+			/* Read status */
+			ret = usb_bulk_msg(gm12u320->udev,
+				usb_rcvbulkpipe(gm12u320->udev, DATA_RCV_EPT),
+				gm12u320->cmd_buf, READ_STATUS_SIZE, &len,
+				CMD_TIMEOUT);
+			if (ret || len != READ_STATUS_SIZE)
+				goto err;
+		}
+
+		/* Send draw command to device */
+		memcpy(gm12u320->cmd_buf, cmd_draw, CMD_SIZE);
+		ret = usb_bulk_msg(gm12u320->udev,
+			usb_sndbulkpipe(gm12u320->udev, DATA_SND_EPT),
+			gm12u320->cmd_buf, CMD_SIZE, &len, CMD_TIMEOUT);
+		if (ret || len != CMD_SIZE)
+			goto err;
+
+		/* Read status */
+		ret = usb_bulk_msg(gm12u320->udev,
+			usb_rcvbulkpipe(gm12u320->udev, DATA_RCV_EPT),
+			gm12u320->cmd_buf, READ_STATUS_SIZE, &len,
+			draw_status_timeout);
+		if (ret || len != READ_STATUS_SIZE)
+			goto err;
+
+		draw_status_timeout = CMD_TIMEOUT;
+		frame = !frame;
+
+		/*
+		 * We must draw a frame every 2s otherwise the projector
+		 * switches back to showing its logo.
+		 */
+		wait_event_timeout(gm12u320->fb_update.waitq,
+				   !gm12u320->fb_update.run ||
+					gm12u320->fb_update.fb != NULL,
+				   IDLE_TIMEOUT);
+	}
+	return;
+err:
+	/* Do not log errors caused by module unload or device unplug */
+	if (ret != -ENODEV && ret != -ECONNRESET && ret != -ESHUTDOWN)
+		GM12U320_ERR("Frame update error: %d\n", ret);
+}
+
+static void gm12u320_fb_mark_dirty(struct drm_framebuffer *fb,
+				   struct drm_rect *dirty)
+{
+	struct gm12u320_device *gm12u320 = fb->dev->dev_private;
+	struct drm_framebuffer *old_fb = NULL;
+	bool wakeup = false;
+
+	mutex_lock(&gm12u320->fb_update.lock);
+
+	if (gm12u320->fb_update.fb != fb) {
+		old_fb = gm12u320->fb_update.fb;
+		drm_framebuffer_get(fb);
+		gm12u320->fb_update.fb = fb;
+		gm12u320->fb_update.rect = *dirty;
+		wakeup = true;
+	} else {
+		struct drm_rect *rect = &gm12u320->fb_update.rect;
+
+		rect->x1 = min(rect->x1, dirty->x1);
+		rect->y1 = min(rect->y1, dirty->y1);
+		rect->x2 = max(rect->x2, dirty->x2);
+		rect->y2 = max(rect->y2, dirty->y2);
+	}
+
+	mutex_unlock(&gm12u320->fb_update.lock);
+
+	if (wakeup)
+		wake_up(&gm12u320->fb_update.waitq);
+
+	if (old_fb)
+		drm_framebuffer_put(old_fb);
+}
+
+static void gm12u320_start_fb_update(struct gm12u320_device *gm12u320)
+{
+	mutex_lock(&gm12u320->fb_update.lock);
+	gm12u320->fb_update.run = true;
+	mutex_unlock(&gm12u320->fb_update.lock);
+
+	queue_work(gm12u320->fb_update.workq, &gm12u320->fb_update.work);
+}
+
+static void gm12u320_stop_fb_update(struct gm12u320_device *gm12u320)
+{
+	mutex_lock(&gm12u320->fb_update.lock);
+	gm12u320->fb_update.run = false;
+	mutex_unlock(&gm12u320->fb_update.lock);
+
+	wake_up(&gm12u320->fb_update.waitq);
+	cancel_work_sync(&gm12u320->fb_update.work);
+
+	mutex_lock(&gm12u320->fb_update.lock);
+	if (gm12u320->fb_update.fb) {
+		drm_framebuffer_put(gm12u320->fb_update.fb);
+		gm12u320->fb_update.fb = NULL;
+	}
+	mutex_unlock(&gm12u320->fb_update.lock);
+}
+
+static int gm12u320_set_ecomode(struct gm12u320_device *gm12u320)
+{
+	return gm12u320_misc_request(gm12u320, MISC_REQ_GET_SET_ECO_A,
+				     MISC_REQ_GET_SET_ECO_B, 0x01 /* set */,
+				     eco_mode ? 0x01 : 0x00, 0x00, 0x01);
+}
+
+/* ------------------------------------------------------------------ */
+/* gm12u320 connector						      */
+
+/*
+ * We use fake EDID info so that userspace know that it is dealing with
+ * an Acer projector, rather then listing this as an "unknown" monitor.
+ * Note this assumes this driver is only ever used with the Acer C120, if we
+ * add support for other devices the vendor and model should be parameterized.
+ */
+static struct edid gm12u320_edid = {
+	.header		= { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 },
+	.mfg_id		= { 0x04, 0x72 },	/* "ACR" */
+	.prod_code	= { 0x20, 0xc1 },	/* C120h */
+	.serial		= 0xaa55aa55,
+	.mfg_week	= 1,
+	.mfg_year	= 16,
+	.version	= 1,			/* EDID 1.3 */
+	.revision	= 3,			/* EDID 1.3 */
+	.input		= 0x08,			/* Analog input */
+	.features	= 0x0a,			/* Pref timing in DTD 1 */
+	.standard_timings = { { 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 },
+			      { 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 } },
+	.detailed_timings = { {
+		.pixel_clock = 3383,
+		/* hactive = 848, hblank = 256 */
+		.data.pixel_data.hactive_lo = 0x50,
+		.data.pixel_data.hblank_lo = 0x00,
+		.data.pixel_data.hactive_hblank_hi = 0x31,
+		/* vactive = 480, vblank = 28 */
+		.data.pixel_data.vactive_lo = 0xe0,
+		.data.pixel_data.vblank_lo = 0x1c,
+		.data.pixel_data.vactive_vblank_hi = 0x10,
+		/* hsync offset 40 pw 128, vsync offset 1 pw 4 */
+		.data.pixel_data.hsync_offset_lo = 0x28,
+		.data.pixel_data.hsync_pulse_width_lo = 0x80,
+		.data.pixel_data.vsync_offset_pulse_width_lo = 0x14,
+		.data.pixel_data.hsync_vsync_offset_pulse_width_hi = 0x00,
+		/* Digital separate syncs, hsync+, vsync+ */
+		.data.pixel_data.misc = 0x1e,
+	}, {
+		.pixel_clock = 0,
+		.data.other_data.type = 0xfd, /* Monitor ranges */
+		.data.other_data.data.range.min_vfreq = 59,
+		.data.other_data.data.range.max_vfreq = 61,
+		.data.other_data.data.range.min_hfreq_khz = 29,
+		.data.other_data.data.range.max_hfreq_khz = 32,
+		.data.other_data.data.range.pixel_clock_mhz = 4, /* 40 MHz */
+		.data.other_data.data.range.flags = 0,
+		.data.other_data.data.range.formula.cvt = {
+			0xa0, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20 },
+	}, {
+		.pixel_clock = 0,
+		.data.other_data.type = 0xfc, /* Model string */
+		.data.other_data.data.str.str = {
+			'P', 'r', 'o', 'j', 'e', 'c', 't', 'o', 'r', '\n',
+			' ', ' ',  ' ' },
+	}, {
+		.pixel_clock = 0,
+		.data.other_data.type = 0xfe, /* Unspecified text / padding */
+		.data.other_data.data.str.str = {
+			'\n', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
+			' ', ' ',  ' ' },
+	} },
+	.checksum = 0x13,
+};
+
+static int gm12u320_conn_get_modes(struct drm_connector *connector)
+{
+	drm_connector_update_edid_property(connector, &gm12u320_edid);
+	return drm_add_edid_modes(connector, &gm12u320_edid);
+}
+
+static const struct drm_connector_helper_funcs gm12u320_conn_helper_funcs = {
+	.get_modes = gm12u320_conn_get_modes,
+};
+
+static const struct drm_connector_funcs gm12u320_conn_funcs = {
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.destroy = drm_connector_cleanup,
+	.reset = drm_atomic_helper_connector_reset,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int gm12u320_conn_init(struct gm12u320_device *gm12u320)
+{
+	drm_connector_helper_add(&gm12u320->conn, &gm12u320_conn_helper_funcs);
+	return drm_connector_init(&gm12u320->dev, &gm12u320->conn,
+				  &gm12u320_conn_funcs, DRM_MODE_CONNECTOR_VGA);
+}
+
+/* ------------------------------------------------------------------ */
+/* gm12u320 (simple) display pipe				      */
+
+static void gm12u320_pipe_enable(struct drm_simple_display_pipe *pipe,
+				 struct drm_crtc_state *crtc_state,
+				 struct drm_plane_state *plane_state)
+{
+	struct gm12u320_device *gm12u320 = pipe->crtc.dev->dev_private;
+	struct drm_rect rect = { 0, 0, GM12U320_USER_WIDTH, GM12U320_HEIGHT };
+
+	gm12u320_fb_mark_dirty(plane_state->fb, &rect);
+	gm12u320_start_fb_update(gm12u320);
+	gm12u320->pipe_enabled = true;
+}
+
+static void gm12u320_pipe_disable(struct drm_simple_display_pipe *pipe)
+{
+	struct gm12u320_device *gm12u320 = pipe->crtc.dev->dev_private;
+
+	gm12u320_stop_fb_update(gm12u320);
+	gm12u320->pipe_enabled = false;
+}
+
+static void gm12u320_pipe_update(struct drm_simple_display_pipe *pipe,
+				 struct drm_plane_state *old_state)
+{
+	struct drm_plane_state *state = pipe->plane.state;
+	struct drm_crtc *crtc = &pipe->crtc;
+	struct drm_rect rect;
+
+	if (drm_atomic_helper_damage_merged(old_state, state, &rect))
+		gm12u320_fb_mark_dirty(pipe->plane.state->fb, &rect);
+
+	if (crtc->state->event) {
+		spin_lock_irq(&crtc->dev->event_lock);
+		drm_crtc_send_vblank_event(crtc, crtc->state->event);
+		crtc->state->event = NULL;
+		spin_unlock_irq(&crtc->dev->event_lock);
+	}
+}
+
+static const struct drm_simple_display_pipe_funcs gm12u320_pipe_funcs = {
+	.enable	    = gm12u320_pipe_enable,
+	.disable    = gm12u320_pipe_disable,
+	.update	    = gm12u320_pipe_update,
+};
+
+static const uint32_t gm12u320_pipe_formats[] = {
+	DRM_FORMAT_XRGB8888,
+};
+
+static const uint64_t gm12u320_pipe_modifiers[] = {
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID
+};
+
+static void gm12u320_driver_release(struct drm_device *dev)
+{
+	struct gm12u320_device *gm12u320 = dev->dev_private;
+
+	gm12u320_usb_free(gm12u320);
+	drm_mode_config_cleanup(dev);
+	drm_dev_fini(dev);
+	kfree(gm12u320);
+}
+
+DEFINE_DRM_GEM_SHMEM_FOPS(gm12u320_fops);
+
+static struct drm_driver gm12u320_drm_driver = {
+	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
+
+	.name		 = DRIVER_NAME,
+	.desc		 = DRIVER_DESC,
+	.date		 = DRIVER_DATE,
+	.major		 = DRIVER_MAJOR,
+	.minor		 = DRIVER_MINOR,
+
+	.release	 = gm12u320_driver_release,
+	.fops		 = &gm12u320_fops,
+	DRM_GEM_SHMEM_DRIVER_OPS,
+};
+
+static const struct drm_mode_config_funcs gm12u320_mode_config_funcs = {
+	.fb_create = drm_gem_fb_create_with_dirty,
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
+};
+
+static int gm12u320_usb_probe(struct usb_interface *interface,
+			      const struct usb_device_id *id)
+{
+	struct gm12u320_device *gm12u320;
+	struct drm_device *dev;
+	int ret;
+
+	/*
+	 * The gm12u320 presents itself to the system as 2 usb mass-storage
+	 * interfaces, we only care about / need the first one.
+	 */
+	if (interface->cur_altsetting->desc.bInterfaceNumber != 0)
+		return -ENODEV;
+
+	gm12u320 = kzalloc(sizeof(*gm12u320), GFP_KERNEL);
+	if (gm12u320 == NULL)
+		return -ENOMEM;
+
+	gm12u320->udev = interface_to_usbdev(interface);
+	INIT_WORK(&gm12u320->fb_update.work, gm12u320_fb_update_work);
+	mutex_init(&gm12u320->fb_update.lock);
+	init_waitqueue_head(&gm12u320->fb_update.waitq);
+
+	dev = &gm12u320->dev;
+	ret = drm_dev_init(dev, &gm12u320_drm_driver, &interface->dev);
+	if (ret) {
+		kfree(gm12u320);
+		return ret;
+	}
+	dev->dev_private = gm12u320;
+
+	drm_mode_config_init(dev);
+	dev->mode_config.min_width = GM12U320_USER_WIDTH;
+	dev->mode_config.max_width = GM12U320_USER_WIDTH;
+	dev->mode_config.min_height = GM12U320_HEIGHT;
+	dev->mode_config.max_height = GM12U320_HEIGHT;
+	dev->mode_config.funcs = &gm12u320_mode_config_funcs;
+
+	ret = gm12u320_usb_alloc(gm12u320);
+	if (ret)
+		goto err_put;
+
+	ret = gm12u320_set_ecomode(gm12u320);
+	if (ret)
+		goto err_put;
+
+	ret = gm12u320_conn_init(gm12u320);
+	if (ret)
+		goto err_put;
+
+	ret = drm_simple_display_pipe_init(&gm12u320->dev,
+					   &gm12u320->pipe,
+					   &gm12u320_pipe_funcs,
+					   gm12u320_pipe_formats,
+					   ARRAY_SIZE(gm12u320_pipe_formats),
+					   gm12u320_pipe_modifiers,
+					   &gm12u320->conn);
+	if (ret)
+		goto err_put;
+
+	drm_mode_config_reset(dev);
+
+	usb_set_intfdata(interface, dev);
+	ret = drm_dev_register(dev, 0);
+	if (ret)
+		goto err_put;
+
+	drm_fbdev_generic_setup(dev, 0);
+
+	return 0;
+
+err_put:
+	drm_dev_put(dev);
+	return ret;
+}
+
+static void gm12u320_usb_disconnect(struct usb_interface *interface)
+{
+	struct drm_device *dev = usb_get_intfdata(interface);
+	struct gm12u320_device *gm12u320 = dev->dev_private;
+
+	gm12u320_stop_fb_update(gm12u320);
+	drm_dev_unplug(dev);
+	drm_dev_put(dev);
+}
+
+static __maybe_unused int gm12u320_suspend(struct usb_interface *interface,
+					   pm_message_t message)
+{
+	struct drm_device *dev = usb_get_intfdata(interface);
+	struct gm12u320_device *gm12u320 = dev->dev_private;
+
+	if (gm12u320->pipe_enabled)
+		gm12u320_stop_fb_update(gm12u320);
+
+	return 0;
+}
+
+static __maybe_unused int gm12u320_resume(struct usb_interface *interface)
+{
+	struct drm_device *dev = usb_get_intfdata(interface);
+	struct gm12u320_device *gm12u320 = dev->dev_private;
+
+	gm12u320_set_ecomode(gm12u320);
+	if (gm12u320->pipe_enabled)
+		gm12u320_start_fb_update(gm12u320);
+
+	return 0;
+}
+
+static const struct usb_device_id id_table[] = {
+	{ USB_DEVICE(0x1de1, 0xc102) },
+	{},
+};
+MODULE_DEVICE_TABLE(usb, id_table);
+
+static struct usb_driver gm12u320_usb_driver = {
+	.name = "gm12u320",
+	.probe = gm12u320_usb_probe,
+	.disconnect = gm12u320_usb_disconnect,
+	.id_table = id_table,
+#ifdef CONFIG_PM
+	.suspend = gm12u320_suspend,
+	.resume = gm12u320_resume,
+	.reset_resume = gm12u320_resume,
+#endif
+};
+
+module_usb_driver(gm12u320_usb_driver);
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/tiny/hx8357d.c b/drivers/gpu/drm/tiny/hx8357d.c
new file mode 100644
index 000000000000..9af8ff84974f
--- /dev/null
+++ b/drivers/gpu/drm/tiny/hx8357d.c
@@ -0,0 +1,304 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * DRM driver for the HX8357D LCD controller
+ *
+ * Copyright 2018 Broadcom
+ * Copyright 2018 David Lechner <david@lechnology.com>
+ * Copyright 2016 Noralf Trønnes
+ * Copyright (C) 2015 Adafruit Industries
+ * Copyright (C) 2013 Christian Vogelgsang
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/spi/spi.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_mipi_dbi.h>
+#include <drm/drm_modeset_helper.h>
+#include <video/mipi_display.h>
+
+#define HX8357D_SETOSC 0xb0
+#define HX8357D_SETPOWER 0xb1
+#define HX8357D_SETRGB 0xb3
+#define HX8357D_SETCYC 0xb3
+#define HX8357D_SETCOM 0xb6
+#define HX8357D_SETEXTC 0xb9
+#define HX8357D_SETSTBA 0xc0
+#define HX8357D_SETPANEL 0xcc
+#define HX8357D_SETGAMMA 0xe0
+
+#define HX8357D_MADCTL_MY  0x80
+#define HX8357D_MADCTL_MX  0x40
+#define HX8357D_MADCTL_MV  0x20
+#define HX8357D_MADCTL_ML  0x10
+#define HX8357D_MADCTL_RGB 0x00
+#define HX8357D_MADCTL_BGR 0x08
+#define HX8357D_MADCTL_MH  0x04
+
+static void yx240qv29_enable(struct drm_simple_display_pipe *pipe,
+			     struct drm_crtc_state *crtc_state,
+			     struct drm_plane_state *plane_state)
+{
+	struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
+	struct mipi_dbi *dbi = &dbidev->dbi;
+	u8 addr_mode;
+	int ret, idx;
+
+	if (!drm_dev_enter(pipe->crtc.dev, &idx))
+		return;
+
+	DRM_DEBUG_KMS("\n");
+
+	ret = mipi_dbi_poweron_conditional_reset(dbidev);
+	if (ret < 0)
+		goto out_exit;
+	if (ret == 1)
+		goto out_enable;
+
+	/* setextc */
+	mipi_dbi_command(dbi, HX8357D_SETEXTC, 0xFF, 0x83, 0x57);
+	msleep(150);
+
+	/* setRGB which also enables SDO */
+	mipi_dbi_command(dbi, HX8357D_SETRGB, 0x00, 0x00, 0x06, 0x06);
+
+	/* -1.52V */
+	mipi_dbi_command(dbi, HX8357D_SETCOM, 0x25);
+
+	/* Normal mode 70Hz, Idle mode 55 Hz */
+	mipi_dbi_command(dbi, HX8357D_SETOSC, 0x68);
+
+	/* Set Panel - BGR, Gate direction swapped */
+	mipi_dbi_command(dbi, HX8357D_SETPANEL, 0x05);
+
+	mipi_dbi_command(dbi, HX8357D_SETPOWER,
+			 0x00,  /* Not deep standby */
+			 0x15,  /* BT */
+			 0x1C,  /* VSPR */
+			 0x1C,  /* VSNR */
+			 0x83,  /* AP */
+			 0xAA);  /* FS */
+
+	mipi_dbi_command(dbi, HX8357D_SETSTBA,
+			 0x50,  /* OPON normal */
+			 0x50,  /* OPON idle */
+			 0x01,  /* STBA */
+			 0x3C,  /* STBA */
+			 0x1E,  /* STBA */
+			 0x08);  /* GEN */
+
+	mipi_dbi_command(dbi, HX8357D_SETCYC,
+			 0x02,  /* NW 0x02 */
+			 0x40,  /* RTN */
+			 0x00,  /* DIV */
+			 0x2A,  /* DUM */
+			 0x2A,  /* DUM */
+			 0x0D,  /* GDON */
+			 0x78);  /* GDOFF */
+
+	mipi_dbi_command(dbi, HX8357D_SETGAMMA,
+			 0x02,
+			 0x0A,
+			 0x11,
+			 0x1d,
+			 0x23,
+			 0x35,
+			 0x41,
+			 0x4b,
+			 0x4b,
+			 0x42,
+			 0x3A,
+			 0x27,
+			 0x1B,
+			 0x08,
+			 0x09,
+			 0x03,
+			 0x02,
+			 0x0A,
+			 0x11,
+			 0x1d,
+			 0x23,
+			 0x35,
+			 0x41,
+			 0x4b,
+			 0x4b,
+			 0x42,
+			 0x3A,
+			 0x27,
+			 0x1B,
+			 0x08,
+			 0x09,
+			 0x03,
+			 0x00,
+			 0x01);
+
+	/* 16 bit */
+	mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT,
+			 MIPI_DCS_PIXEL_FMT_16BIT);
+
+	/* TE off */
+	mipi_dbi_command(dbi, MIPI_DCS_SET_TEAR_ON, 0x00);
+
+	/* tear line */
+	mipi_dbi_command(dbi, MIPI_DCS_SET_TEAR_SCANLINE, 0x00, 0x02);
+
+	/* Exit Sleep */
+	mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
+	msleep(150);
+
+	/* display on */
+	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
+	usleep_range(5000, 7000);
+
+out_enable:
+	switch (dbidev->rotation) {
+	default:
+		addr_mode = HX8357D_MADCTL_MX | HX8357D_MADCTL_MY;
+		break;
+	case 90:
+		addr_mode = HX8357D_MADCTL_MV | HX8357D_MADCTL_MY;
+		break;
+	case 180:
+		addr_mode = 0;
+		break;
+	case 270:
+		addr_mode = HX8357D_MADCTL_MV | HX8357D_MADCTL_MX;
+		break;
+	}
+	mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
+	mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
+out_exit:
+	drm_dev_exit(idx);
+}
+
+static const struct drm_simple_display_pipe_funcs hx8357d_pipe_funcs = {
+	.enable = yx240qv29_enable,
+	.disable = mipi_dbi_pipe_disable,
+	.update = mipi_dbi_pipe_update,
+	.prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
+};
+
+static const struct drm_display_mode yx350hv15_mode = {
+	DRM_SIMPLE_MODE(320, 480, 60, 75),
+};
+
+DEFINE_DRM_GEM_CMA_FOPS(hx8357d_fops);
+
+static struct drm_driver hx8357d_driver = {
+	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+	.fops			= &hx8357d_fops,
+	.release		= mipi_dbi_release,
+	DRM_GEM_CMA_VMAP_DRIVER_OPS,
+	.debugfs_init		= mipi_dbi_debugfs_init,
+	.name			= "hx8357d",
+	.desc			= "HX8357D",
+	.date			= "20181023",
+	.major			= 1,
+	.minor			= 0,
+};
+
+static const struct of_device_id hx8357d_of_match[] = {
+	{ .compatible = "adafruit,yx350hv15" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, hx8357d_of_match);
+
+static const struct spi_device_id hx8357d_id[] = {
+	{ "yx350hv15", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(spi, hx8357d_id);
+
+static int hx8357d_probe(struct spi_device *spi)
+{
+	struct device *dev = &spi->dev;
+	struct mipi_dbi_dev *dbidev;
+	struct drm_device *drm;
+	struct gpio_desc *dc;
+	u32 rotation = 0;
+	int ret;
+
+	dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
+	if (!dbidev)
+		return -ENOMEM;
+
+	drm = &dbidev->drm;
+	ret = devm_drm_dev_init(dev, drm, &hx8357d_driver);
+	if (ret) {
+		kfree(dbidev);
+		return ret;
+	}
+
+	drm_mode_config_init(drm);
+
+	dc = devm_gpiod_get(dev, "dc", GPIOD_OUT_LOW);
+	if (IS_ERR(dc)) {
+		DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
+		return PTR_ERR(dc);
+	}
+
+	dbidev->backlight = devm_of_find_backlight(dev);
+	if (IS_ERR(dbidev->backlight))
+		return PTR_ERR(dbidev->backlight);
+
+	device_property_read_u32(dev, "rotation", &rotation);
+
+	ret = mipi_dbi_spi_init(spi, &dbidev->dbi, dc);
+	if (ret)
+		return ret;
+
+	ret = mipi_dbi_dev_init(dbidev, &hx8357d_pipe_funcs, &yx350hv15_mode, rotation);
+	if (ret)
+		return ret;
+
+	drm_mode_config_reset(drm);
+
+	ret = drm_dev_register(drm, 0);
+	if (ret)
+		return ret;
+
+	spi_set_drvdata(spi, drm);
+
+	drm_fbdev_generic_setup(drm, 0);
+
+	return 0;
+}
+
+static int hx8357d_remove(struct spi_device *spi)
+{
+	struct drm_device *drm = spi_get_drvdata(spi);
+
+	drm_dev_unplug(drm);
+	drm_atomic_helper_shutdown(drm);
+
+	return 0;
+}
+
+static void hx8357d_shutdown(struct spi_device *spi)
+{
+	drm_atomic_helper_shutdown(spi_get_drvdata(spi));
+}
+
+static struct spi_driver hx8357d_spi_driver = {
+	.driver = {
+		.name = "hx8357d",
+		.of_match_table = hx8357d_of_match,
+	},
+	.id_table = hx8357d_id,
+	.probe = hx8357d_probe,
+	.remove = hx8357d_remove,
+	.shutdown = hx8357d_shutdown,
+};
+module_spi_driver(hx8357d_spi_driver);
+
+MODULE_DESCRIPTION("HX8357D DRM driver");
+MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/tiny/ili9225.c b/drivers/gpu/drm/tiny/ili9225.c
new file mode 100644
index 000000000000..c66acc566c2b
--- /dev/null
+++ b/drivers/gpu/drm/tiny/ili9225.c
@@ -0,0 +1,470 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * DRM driver for Ilitek ILI9225 panels
+ *
+ * Copyright 2017 David Lechner <david@lechnology.com>
+ *
+ * Some code copied from mipi-dbi.c
+ * Copyright 2016 Noralf Trønnes
+ */
+
+#include <linux/delay.h>
+#include <linux/dma-buf.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/spi/spi.h>
+#include <video/mipi_display.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_damage_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_mipi_dbi.h>
+#include <drm/drm_rect.h>
+#include <drm/drm_vblank.h>
+
+#define ILI9225_DRIVER_READ_CODE	0x00
+#define ILI9225_DRIVER_OUTPUT_CONTROL	0x01
+#define ILI9225_LCD_AC_DRIVING_CONTROL	0x02
+#define ILI9225_ENTRY_MODE		0x03
+#define ILI9225_DISPLAY_CONTROL_1	0x07
+#define ILI9225_BLANK_PERIOD_CONTROL_1	0x08
+#define ILI9225_FRAME_CYCLE_CONTROL	0x0b
+#define ILI9225_INTERFACE_CONTROL	0x0c
+#define ILI9225_OSCILLATION_CONTROL	0x0f
+#define ILI9225_POWER_CONTROL_1		0x10
+#define ILI9225_POWER_CONTROL_2		0x11
+#define ILI9225_POWER_CONTROL_3		0x12
+#define ILI9225_POWER_CONTROL_4		0x13
+#define ILI9225_POWER_CONTROL_5		0x14
+#define ILI9225_VCI_RECYCLING		0x15
+#define ILI9225_RAM_ADDRESS_SET_1	0x20
+#define ILI9225_RAM_ADDRESS_SET_2	0x21
+#define ILI9225_WRITE_DATA_TO_GRAM	0x22
+#define ILI9225_SOFTWARE_RESET		0x28
+#define ILI9225_GATE_SCAN_CONTROL	0x30
+#define ILI9225_VERTICAL_SCROLL_1	0x31
+#define ILI9225_VERTICAL_SCROLL_2	0x32
+#define ILI9225_VERTICAL_SCROLL_3	0x33
+#define ILI9225_PARTIAL_DRIVING_POS_1	0x34
+#define ILI9225_PARTIAL_DRIVING_POS_2	0x35
+#define ILI9225_HORIZ_WINDOW_ADDR_1	0x36
+#define ILI9225_HORIZ_WINDOW_ADDR_2	0x37
+#define ILI9225_VERT_WINDOW_ADDR_1	0x38
+#define ILI9225_VERT_WINDOW_ADDR_2	0x39
+#define ILI9225_GAMMA_CONTROL_1		0x50
+#define ILI9225_GAMMA_CONTROL_2		0x51
+#define ILI9225_GAMMA_CONTROL_3		0x52
+#define ILI9225_GAMMA_CONTROL_4		0x53
+#define ILI9225_GAMMA_CONTROL_5		0x54
+#define ILI9225_GAMMA_CONTROL_6		0x55
+#define ILI9225_GAMMA_CONTROL_7		0x56
+#define ILI9225_GAMMA_CONTROL_8		0x57
+#define ILI9225_GAMMA_CONTROL_9		0x58
+#define ILI9225_GAMMA_CONTROL_10	0x59
+
+static inline int ili9225_command(struct mipi_dbi *dbi, u8 cmd, u16 data)
+{
+	u8 par[2] = { data >> 8, data & 0xff };
+
+	return mipi_dbi_command_buf(dbi, cmd, par, 2);
+}
+
+static void ili9225_fb_dirty(struct drm_framebuffer *fb, struct drm_rect *rect)
+{
+	struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
+	struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(fb->dev);
+	unsigned int height = rect->y2 - rect->y1;
+	unsigned int width = rect->x2 - rect->x1;
+	struct mipi_dbi *dbi = &dbidev->dbi;
+	bool swap = dbi->swap_bytes;
+	u16 x_start, y_start;
+	u16 x1, x2, y1, y2;
+	int idx, ret = 0;
+	bool full;
+	void *tr;
+
+	if (!dbidev->enabled)
+		return;
+
+	if (!drm_dev_enter(fb->dev, &idx))
+		return;
+
+	full = width == fb->width && height == fb->height;
+
+	DRM_DEBUG_KMS("Flushing [FB:%d] " DRM_RECT_FMT "\n", fb->base.id, DRM_RECT_ARG(rect));
+
+	if (!dbi->dc || !full || swap ||
+	    fb->format->format == DRM_FORMAT_XRGB8888) {
+		tr = dbidev->tx_buf;
+		ret = mipi_dbi_buf_copy(dbidev->tx_buf, fb, rect, swap);
+		if (ret)
+			goto err_msg;
+	} else {
+		tr = cma_obj->vaddr;
+	}
+
+	switch (dbidev->rotation) {
+	default:
+		x1 = rect->x1;
+		x2 = rect->x2 - 1;
+		y1 = rect->y1;
+		y2 = rect->y2 - 1;
+		x_start = x1;
+		y_start = y1;
+		break;
+	case 90:
+		x1 = rect->y1;
+		x2 = rect->y2 - 1;
+		y1 = fb->width - rect->x2;
+		y2 = fb->width - rect->x1 - 1;
+		x_start = x1;
+		y_start = y2;
+		break;
+	case 180:
+		x1 = fb->width - rect->x2;
+		x2 = fb->width - rect->x1 - 1;
+		y1 = fb->height - rect->y2;
+		y2 = fb->height - rect->y1 - 1;
+		x_start = x2;
+		y_start = y2;
+		break;
+	case 270:
+		x1 = fb->height - rect->y2;
+		x2 = fb->height - rect->y1 - 1;
+		y1 = rect->x1;
+		y2 = rect->x2 - 1;
+		x_start = x2;
+		y_start = y1;
+		break;
+	}
+
+	ili9225_command(dbi, ILI9225_HORIZ_WINDOW_ADDR_1, x2);
+	ili9225_command(dbi, ILI9225_HORIZ_WINDOW_ADDR_2, x1);
+	ili9225_command(dbi, ILI9225_VERT_WINDOW_ADDR_1, y2);
+	ili9225_command(dbi, ILI9225_VERT_WINDOW_ADDR_2, y1);
+
+	ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_1, x_start);
+	ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_2, y_start);
+
+	ret = mipi_dbi_command_buf(dbi, ILI9225_WRITE_DATA_TO_GRAM, tr,
+				   width * height * 2);
+err_msg:
+	if (ret)
+		dev_err_once(fb->dev->dev, "Failed to update display %d\n", ret);
+
+	drm_dev_exit(idx);
+}
+
+static void ili9225_pipe_update(struct drm_simple_display_pipe *pipe,
+				struct drm_plane_state *old_state)
+{
+	struct drm_plane_state *state = pipe->plane.state;
+	struct drm_crtc *crtc = &pipe->crtc;
+	struct drm_rect rect;
+
+	if (drm_atomic_helper_damage_merged(old_state, state, &rect))
+		ili9225_fb_dirty(state->fb, &rect);
+
+	if (crtc->state->event) {
+		spin_lock_irq(&crtc->dev->event_lock);
+		drm_crtc_send_vblank_event(crtc, crtc->state->event);
+		spin_unlock_irq(&crtc->dev->event_lock);
+		crtc->state->event = NULL;
+	}
+}
+
+static void ili9225_pipe_enable(struct drm_simple_display_pipe *pipe,
+				struct drm_crtc_state *crtc_state,
+				struct drm_plane_state *plane_state)
+{
+	struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
+	struct drm_framebuffer *fb = plane_state->fb;
+	struct device *dev = pipe->crtc.dev->dev;
+	struct mipi_dbi *dbi = &dbidev->dbi;
+	struct drm_rect rect = {
+		.x1 = 0,
+		.x2 = fb->width,
+		.y1 = 0,
+		.y2 = fb->height,
+	};
+	int ret, idx;
+	u8 am_id;
+
+	if (!drm_dev_enter(pipe->crtc.dev, &idx))
+		return;
+
+	DRM_DEBUG_KMS("\n");
+
+	mipi_dbi_hw_reset(dbi);
+
+	/*
+	 * There don't seem to be two example init sequences that match, so
+	 * using the one from the popular Arduino library for this display.
+	 * https://github.com/Nkawu/TFT_22_ILI9225/blob/master/src/TFT_22_ILI9225.cpp
+	 */
+
+	ret = ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0000);
+	if (ret) {
+		DRM_DEV_ERROR(dev, "Error sending command %d\n", ret);
+		goto out_exit;
+	}
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0000);
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_3, 0x0000);
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_4, 0x0000);
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_5, 0x0000);
+
+	msleep(40);
+
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0018);
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_3, 0x6121);
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_4, 0x006f);
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_5, 0x495f);
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0800);
+
+	msleep(10);
+
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x103b);
+
+	msleep(50);
+
+	switch (dbidev->rotation) {
+	default:
+		am_id = 0x30;
+		break;
+	case 90:
+		am_id = 0x18;
+		break;
+	case 180:
+		am_id = 0x00;
+		break;
+	case 270:
+		am_id = 0x28;
+		break;
+	}
+	ili9225_command(dbi, ILI9225_DRIVER_OUTPUT_CONTROL, 0x011c);
+	ili9225_command(dbi, ILI9225_LCD_AC_DRIVING_CONTROL, 0x0100);
+	ili9225_command(dbi, ILI9225_ENTRY_MODE, 0x1000 | am_id);
+	ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
+	ili9225_command(dbi, ILI9225_BLANK_PERIOD_CONTROL_1, 0x0808);
+	ili9225_command(dbi, ILI9225_FRAME_CYCLE_CONTROL, 0x1100);
+	ili9225_command(dbi, ILI9225_INTERFACE_CONTROL, 0x0000);
+	ili9225_command(dbi, ILI9225_OSCILLATION_CONTROL, 0x0d01);
+	ili9225_command(dbi, ILI9225_VCI_RECYCLING, 0x0020);
+	ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_1, 0x0000);
+	ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_2, 0x0000);
+
+	ili9225_command(dbi, ILI9225_GATE_SCAN_CONTROL, 0x0000);
+	ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_1, 0x00db);
+	ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_2, 0x0000);
+	ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_3, 0x0000);
+	ili9225_command(dbi, ILI9225_PARTIAL_DRIVING_POS_1, 0x00db);
+	ili9225_command(dbi, ILI9225_PARTIAL_DRIVING_POS_2, 0x0000);
+
+	ili9225_command(dbi, ILI9225_GAMMA_CONTROL_1, 0x0000);
+	ili9225_command(dbi, ILI9225_GAMMA_CONTROL_2, 0x0808);
+	ili9225_command(dbi, ILI9225_GAMMA_CONTROL_3, 0x080a);
+	ili9225_command(dbi, ILI9225_GAMMA_CONTROL_4, 0x000a);
+	ili9225_command(dbi, ILI9225_GAMMA_CONTROL_5, 0x0a08);
+	ili9225_command(dbi, ILI9225_GAMMA_CONTROL_6, 0x0808);
+	ili9225_command(dbi, ILI9225_GAMMA_CONTROL_7, 0x0000);
+	ili9225_command(dbi, ILI9225_GAMMA_CONTROL_8, 0x0a00);
+	ili9225_command(dbi, ILI9225_GAMMA_CONTROL_9, 0x0710);
+	ili9225_command(dbi, ILI9225_GAMMA_CONTROL_10, 0x0710);
+
+	ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0012);
+
+	msleep(50);
+
+	ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x1017);
+
+	dbidev->enabled = true;
+	ili9225_fb_dirty(fb, &rect);
+out_exit:
+	drm_dev_exit(idx);
+}
+
+static void ili9225_pipe_disable(struct drm_simple_display_pipe *pipe)
+{
+	struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
+	struct mipi_dbi *dbi = &dbidev->dbi;
+
+	DRM_DEBUG_KMS("\n");
+
+	/*
+	 * This callback is not protected by drm_dev_enter/exit since we want to
+	 * turn off the display on regular driver unload. It's highly unlikely
+	 * that the underlying SPI controller is gone should this be called after
+	 * unplug.
+	 */
+
+	if (!dbidev->enabled)
+		return;
+
+	ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
+	msleep(50);
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0007);
+	msleep(50);
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0a02);
+
+	dbidev->enabled = false;
+}
+
+static int ili9225_dbi_command(struct mipi_dbi *dbi, u8 *cmd, u8 *par,
+			       size_t num)
+{
+	struct spi_device *spi = dbi->spi;
+	unsigned int bpw = 8;
+	u32 speed_hz;
+	int ret;
+
+	gpiod_set_value_cansleep(dbi->dc, 0);
+	speed_hz = mipi_dbi_spi_cmd_max_speed(spi, 1);
+	ret = mipi_dbi_spi_transfer(spi, speed_hz, 8, cmd, 1);
+	if (ret || !num)
+		return ret;
+
+	if (*cmd == ILI9225_WRITE_DATA_TO_GRAM && !dbi->swap_bytes)
+		bpw = 16;
+
+	gpiod_set_value_cansleep(dbi->dc, 1);
+	speed_hz = mipi_dbi_spi_cmd_max_speed(spi, num);
+
+	return mipi_dbi_spi_transfer(spi, speed_hz, bpw, par, num);
+}
+
+static const struct drm_simple_display_pipe_funcs ili9225_pipe_funcs = {
+	.enable		= ili9225_pipe_enable,
+	.disable	= ili9225_pipe_disable,
+	.update		= ili9225_pipe_update,
+	.prepare_fb	= drm_gem_fb_simple_display_pipe_prepare_fb,
+};
+
+static const struct drm_display_mode ili9225_mode = {
+	DRM_SIMPLE_MODE(176, 220, 35, 44),
+};
+
+DEFINE_DRM_GEM_CMA_FOPS(ili9225_fops);
+
+static struct drm_driver ili9225_driver = {
+	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+	.fops			= &ili9225_fops,
+	.release		= mipi_dbi_release,
+	DRM_GEM_CMA_VMAP_DRIVER_OPS,
+	.name			= "ili9225",
+	.desc			= "Ilitek ILI9225",
+	.date			= "20171106",
+	.major			= 1,
+	.minor			= 0,
+};
+
+static const struct of_device_id ili9225_of_match[] = {
+	{ .compatible = "vot,v220hf01a-t" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, ili9225_of_match);
+
+static const struct spi_device_id ili9225_id[] = {
+	{ "v220hf01a-t", 0 },
+	{ },
+};
+MODULE_DEVICE_TABLE(spi, ili9225_id);
+
+static int ili9225_probe(struct spi_device *spi)
+{
+	struct device *dev = &spi->dev;
+	struct mipi_dbi_dev *dbidev;
+	struct drm_device *drm;
+	struct mipi_dbi *dbi;
+	struct gpio_desc *rs;
+	u32 rotation = 0;
+	int ret;
+
+	dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
+	if (!dbidev)
+		return -ENOMEM;
+
+	dbi = &dbidev->dbi;
+	drm = &dbidev->drm;
+	ret = devm_drm_dev_init(dev, drm, &ili9225_driver);
+	if (ret) {
+		kfree(dbidev);
+		return ret;
+	}
+
+	drm_mode_config_init(drm);
+
+	dbi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(dbi->reset)) {
+		DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
+		return PTR_ERR(dbi->reset);
+	}
+
+	rs = devm_gpiod_get(dev, "rs", GPIOD_OUT_LOW);
+	if (IS_ERR(rs)) {
+		DRM_DEV_ERROR(dev, "Failed to get gpio 'rs'\n");
+		return PTR_ERR(rs);
+	}
+
+	device_property_read_u32(dev, "rotation", &rotation);
+
+	ret = mipi_dbi_spi_init(spi, dbi, rs);
+	if (ret)
+		return ret;
+
+	/* override the command function set in  mipi_dbi_spi_init() */
+	dbi->command = ili9225_dbi_command;
+
+	ret = mipi_dbi_dev_init(dbidev, &ili9225_pipe_funcs, &ili9225_mode, rotation);
+	if (ret)
+		return ret;
+
+	drm_mode_config_reset(drm);
+
+	ret = drm_dev_register(drm, 0);
+	if (ret)
+		return ret;
+
+	spi_set_drvdata(spi, drm);
+
+	drm_fbdev_generic_setup(drm, 0);
+
+	return 0;
+}
+
+static int ili9225_remove(struct spi_device *spi)
+{
+	struct drm_device *drm = spi_get_drvdata(spi);
+
+	drm_dev_unplug(drm);
+	drm_atomic_helper_shutdown(drm);
+
+	return 0;
+}
+
+static void ili9225_shutdown(struct spi_device *spi)
+{
+	drm_atomic_helper_shutdown(spi_get_drvdata(spi));
+}
+
+static struct spi_driver ili9225_spi_driver = {
+	.driver = {
+		.name = "ili9225",
+		.owner = THIS_MODULE,
+		.of_match_table = ili9225_of_match,
+	},
+	.id_table = ili9225_id,
+	.probe = ili9225_probe,
+	.remove = ili9225_remove,
+	.shutdown = ili9225_shutdown,
+};
+module_spi_driver(ili9225_spi_driver);
+
+MODULE_DESCRIPTION("Ilitek ILI9225 DRM driver");
+MODULE_AUTHOR("David Lechner <david@lechnology.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/tiny/ili9341.c b/drivers/gpu/drm/tiny/ili9341.c
new file mode 100644
index 000000000000..33b51dc7faa8
--- /dev/null
+++ b/drivers/gpu/drm/tiny/ili9341.c
@@ -0,0 +1,268 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * DRM driver for Ilitek ILI9341 panels
+ *
+ * Copyright 2018 David Lechner <david@lechnology.com>
+ *
+ * Based on mi0283qt.c:
+ * Copyright 2016 Noralf Trønnes
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/spi/spi.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_mipi_dbi.h>
+#include <drm/drm_modeset_helper.h>
+#include <video/mipi_display.h>
+
+#define ILI9341_FRMCTR1		0xb1
+#define ILI9341_DISCTRL		0xb6
+#define ILI9341_ETMOD		0xb7
+
+#define ILI9341_PWCTRL1		0xc0
+#define ILI9341_PWCTRL2		0xc1
+#define ILI9341_VMCTRL1		0xc5
+#define ILI9341_VMCTRL2		0xc7
+#define ILI9341_PWCTRLA		0xcb
+#define ILI9341_PWCTRLB		0xcf
+
+#define ILI9341_PGAMCTRL	0xe0
+#define ILI9341_NGAMCTRL	0xe1
+#define ILI9341_DTCTRLA		0xe8
+#define ILI9341_DTCTRLB		0xea
+#define ILI9341_PWRSEQ		0xed
+
+#define ILI9341_EN3GAM		0xf2
+#define ILI9341_PUMPCTRL	0xf7
+
+#define ILI9341_MADCTL_BGR	BIT(3)
+#define ILI9341_MADCTL_MV	BIT(5)
+#define ILI9341_MADCTL_MX	BIT(6)
+#define ILI9341_MADCTL_MY	BIT(7)
+
+static void yx240qv29_enable(struct drm_simple_display_pipe *pipe,
+			     struct drm_crtc_state *crtc_state,
+			     struct drm_plane_state *plane_state)
+{
+	struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
+	struct mipi_dbi *dbi = &dbidev->dbi;
+	u8 addr_mode;
+	int ret, idx;
+
+	if (!drm_dev_enter(pipe->crtc.dev, &idx))
+		return;
+
+	DRM_DEBUG_KMS("\n");
+
+	ret = mipi_dbi_poweron_conditional_reset(dbidev);
+	if (ret < 0)
+		goto out_exit;
+	if (ret == 1)
+		goto out_enable;
+
+	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);
+
+	mipi_dbi_command(dbi, ILI9341_PWCTRLB, 0x00, 0xc1, 0x30);
+	mipi_dbi_command(dbi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81);
+	mipi_dbi_command(dbi, ILI9341_DTCTRLA, 0x85, 0x00, 0x78);
+	mipi_dbi_command(dbi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02);
+	mipi_dbi_command(dbi, ILI9341_PUMPCTRL, 0x20);
+	mipi_dbi_command(dbi, ILI9341_DTCTRLB, 0x00, 0x00);
+
+	/* Power Control */
+	mipi_dbi_command(dbi, ILI9341_PWCTRL1, 0x23);
+	mipi_dbi_command(dbi, ILI9341_PWCTRL2, 0x10);
+	/* VCOM */
+	mipi_dbi_command(dbi, ILI9341_VMCTRL1, 0x3e, 0x28);
+	mipi_dbi_command(dbi, ILI9341_VMCTRL2, 0x86);
+
+	/* Memory Access Control */
+	mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
+
+	/* Frame Rate */
+	mipi_dbi_command(dbi, ILI9341_FRMCTR1, 0x00, 0x1b);
+
+	/* Gamma */
+	mipi_dbi_command(dbi, ILI9341_EN3GAM, 0x00);
+	mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
+	mipi_dbi_command(dbi, ILI9341_PGAMCTRL,
+			 0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1,
+			 0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00);
+	mipi_dbi_command(dbi, ILI9341_NGAMCTRL,
+			 0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1,
+			 0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f);
+
+	/* DDRAM */
+	mipi_dbi_command(dbi, ILI9341_ETMOD, 0x07);
+
+	/* Display */
+	mipi_dbi_command(dbi, ILI9341_DISCTRL, 0x08, 0x82, 0x27, 0x00);
+	mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
+	msleep(100);
+
+	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
+	msleep(100);
+
+out_enable:
+	switch (dbidev->rotation) {
+	default:
+		addr_mode = ILI9341_MADCTL_MX;
+		break;
+	case 90:
+		addr_mode = ILI9341_MADCTL_MV;
+		break;
+	case 180:
+		addr_mode = ILI9341_MADCTL_MY;
+		break;
+	case 270:
+		addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY |
+			    ILI9341_MADCTL_MX;
+		break;
+	}
+	addr_mode |= ILI9341_MADCTL_BGR;
+	mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
+	mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
+out_exit:
+	drm_dev_exit(idx);
+}
+
+static const struct drm_simple_display_pipe_funcs ili9341_pipe_funcs = {
+	.enable = yx240qv29_enable,
+	.disable = mipi_dbi_pipe_disable,
+	.update = mipi_dbi_pipe_update,
+	.prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
+};
+
+static const struct drm_display_mode yx240qv29_mode = {
+	DRM_SIMPLE_MODE(240, 320, 37, 49),
+};
+
+DEFINE_DRM_GEM_CMA_FOPS(ili9341_fops);
+
+static struct drm_driver ili9341_driver = {
+	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+	.fops			= &ili9341_fops,
+	.release		= mipi_dbi_release,
+	DRM_GEM_CMA_VMAP_DRIVER_OPS,
+	.debugfs_init		= mipi_dbi_debugfs_init,
+	.name			= "ili9341",
+	.desc			= "Ilitek ILI9341",
+	.date			= "20180514",
+	.major			= 1,
+	.minor			= 0,
+};
+
+static const struct of_device_id ili9341_of_match[] = {
+	{ .compatible = "adafruit,yx240qv29" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, ili9341_of_match);
+
+static const struct spi_device_id ili9341_id[] = {
+	{ "yx240qv29", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(spi, ili9341_id);
+
+static int ili9341_probe(struct spi_device *spi)
+{
+	struct device *dev = &spi->dev;
+	struct mipi_dbi_dev *dbidev;
+	struct drm_device *drm;
+	struct mipi_dbi *dbi;
+	struct gpio_desc *dc;
+	u32 rotation = 0;
+	int ret;
+
+	dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
+	if (!dbidev)
+		return -ENOMEM;
+
+	dbi = &dbidev->dbi;
+	drm = &dbidev->drm;
+	ret = devm_drm_dev_init(dev, drm, &ili9341_driver);
+	if (ret) {
+		kfree(dbidev);
+		return ret;
+	}
+
+	drm_mode_config_init(drm);
+
+	dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(dbi->reset)) {
+		DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
+		return PTR_ERR(dbi->reset);
+	}
+
+	dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
+	if (IS_ERR(dc)) {
+		DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
+		return PTR_ERR(dc);
+	}
+
+	dbidev->backlight = devm_of_find_backlight(dev);
+	if (IS_ERR(dbidev->backlight))
+		return PTR_ERR(dbidev->backlight);
+
+	device_property_read_u32(dev, "rotation", &rotation);
+
+	ret = mipi_dbi_spi_init(spi, dbi, dc);
+	if (ret)
+		return ret;
+
+	ret = mipi_dbi_dev_init(dbidev, &ili9341_pipe_funcs, &yx240qv29_mode, rotation);
+	if (ret)
+		return ret;
+
+	drm_mode_config_reset(drm);
+
+	ret = drm_dev_register(drm, 0);
+	if (ret)
+		return ret;
+
+	spi_set_drvdata(spi, drm);
+
+	drm_fbdev_generic_setup(drm, 0);
+
+	return 0;
+}
+
+static int ili9341_remove(struct spi_device *spi)
+{
+	struct drm_device *drm = spi_get_drvdata(spi);
+
+	drm_dev_unplug(drm);
+	drm_atomic_helper_shutdown(drm);
+
+	return 0;
+}
+
+static void ili9341_shutdown(struct spi_device *spi)
+{
+	drm_atomic_helper_shutdown(spi_get_drvdata(spi));
+}
+
+static struct spi_driver ili9341_spi_driver = {
+	.driver = {
+		.name = "ili9341",
+		.of_match_table = ili9341_of_match,
+	},
+	.id_table = ili9341_id,
+	.probe = ili9341_probe,
+	.remove = ili9341_remove,
+	.shutdown = ili9341_shutdown,
+};
+module_spi_driver(ili9341_spi_driver);
+
+MODULE_DESCRIPTION("Ilitek ILI9341 DRM driver");
+MODULE_AUTHOR("David Lechner <david@lechnology.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/tiny/mi0283qt.c b/drivers/gpu/drm/tiny/mi0283qt.c
new file mode 100644
index 000000000000..e2cfd9a17143
--- /dev/null
+++ b/drivers/gpu/drm/tiny/mi0283qt.c
@@ -0,0 +1,294 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * DRM driver for Multi-Inno MI0283QT panels
+ *
+ * Copyright 2016 Noralf Trønnes
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spi/spi.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_mipi_dbi.h>
+#include <drm/drm_modeset_helper.h>
+#include <video/mipi_display.h>
+
+#define ILI9341_FRMCTR1		0xb1
+#define ILI9341_DISCTRL		0xb6
+#define ILI9341_ETMOD		0xb7
+
+#define ILI9341_PWCTRL1		0xc0
+#define ILI9341_PWCTRL2		0xc1
+#define ILI9341_VMCTRL1		0xc5
+#define ILI9341_VMCTRL2		0xc7
+#define ILI9341_PWCTRLA		0xcb
+#define ILI9341_PWCTRLB		0xcf
+
+#define ILI9341_PGAMCTRL	0xe0
+#define ILI9341_NGAMCTRL	0xe1
+#define ILI9341_DTCTRLA		0xe8
+#define ILI9341_DTCTRLB		0xea
+#define ILI9341_PWRSEQ		0xed
+
+#define ILI9341_EN3GAM		0xf2
+#define ILI9341_PUMPCTRL	0xf7
+
+#define ILI9341_MADCTL_BGR	BIT(3)
+#define ILI9341_MADCTL_MV	BIT(5)
+#define ILI9341_MADCTL_MX	BIT(6)
+#define ILI9341_MADCTL_MY	BIT(7)
+
+static void mi0283qt_enable(struct drm_simple_display_pipe *pipe,
+			    struct drm_crtc_state *crtc_state,
+			    struct drm_plane_state *plane_state)
+{
+	struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
+	struct mipi_dbi *dbi = &dbidev->dbi;
+	u8 addr_mode;
+	int ret, idx;
+
+	if (!drm_dev_enter(pipe->crtc.dev, &idx))
+		return;
+
+	DRM_DEBUG_KMS("\n");
+
+	ret = mipi_dbi_poweron_conditional_reset(dbidev);
+	if (ret < 0)
+		goto out_exit;
+	if (ret == 1)
+		goto out_enable;
+
+	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);
+
+	mipi_dbi_command(dbi, ILI9341_PWCTRLB, 0x00, 0x83, 0x30);
+	mipi_dbi_command(dbi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81);
+	mipi_dbi_command(dbi, ILI9341_DTCTRLA, 0x85, 0x01, 0x79);
+	mipi_dbi_command(dbi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02);
+	mipi_dbi_command(dbi, ILI9341_PUMPCTRL, 0x20);
+	mipi_dbi_command(dbi, ILI9341_DTCTRLB, 0x00, 0x00);
+
+	/* Power Control */
+	mipi_dbi_command(dbi, ILI9341_PWCTRL1, 0x26);
+	mipi_dbi_command(dbi, ILI9341_PWCTRL2, 0x11);
+	/* VCOM */
+	mipi_dbi_command(dbi, ILI9341_VMCTRL1, 0x35, 0x3e);
+	mipi_dbi_command(dbi, ILI9341_VMCTRL2, 0xbe);
+
+	/* Memory Access Control */
+	mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
+
+	/* Frame Rate */
+	mipi_dbi_command(dbi, ILI9341_FRMCTR1, 0x00, 0x1b);
+
+	/* Gamma */
+	mipi_dbi_command(dbi, ILI9341_EN3GAM, 0x08);
+	mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
+	mipi_dbi_command(dbi, ILI9341_PGAMCTRL,
+		       0x1f, 0x1a, 0x18, 0x0a, 0x0f, 0x06, 0x45, 0x87,
+		       0x32, 0x0a, 0x07, 0x02, 0x07, 0x05, 0x00);
+	mipi_dbi_command(dbi, ILI9341_NGAMCTRL,
+		       0x00, 0x25, 0x27, 0x05, 0x10, 0x09, 0x3a, 0x78,
+		       0x4d, 0x05, 0x18, 0x0d, 0x38, 0x3a, 0x1f);
+
+	/* DDRAM */
+	mipi_dbi_command(dbi, ILI9341_ETMOD, 0x07);
+
+	/* Display */
+	mipi_dbi_command(dbi, ILI9341_DISCTRL, 0x0a, 0x82, 0x27, 0x00);
+	mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
+	msleep(100);
+
+	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
+	msleep(100);
+
+out_enable:
+	/* The PiTFT (ili9340) has a hardware reset circuit that
+	 * resets only on power-on and not on each reboot through
+	 * a gpio like the rpi-display does.
+	 * As a result, we need to always apply the rotation value
+	 * regardless of the display "on/off" state.
+	 */
+	switch (dbidev->rotation) {
+	default:
+		addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY |
+			    ILI9341_MADCTL_MX;
+		break;
+	case 90:
+		addr_mode = ILI9341_MADCTL_MY;
+		break;
+	case 180:
+		addr_mode = ILI9341_MADCTL_MV;
+		break;
+	case 270:
+		addr_mode = ILI9341_MADCTL_MX;
+		break;
+	}
+	addr_mode |= ILI9341_MADCTL_BGR;
+	mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
+	mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
+out_exit:
+	drm_dev_exit(idx);
+}
+
+static const struct drm_simple_display_pipe_funcs mi0283qt_pipe_funcs = {
+	.enable = mi0283qt_enable,
+	.disable = mipi_dbi_pipe_disable,
+	.update = mipi_dbi_pipe_update,
+	.prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
+};
+
+static const struct drm_display_mode mi0283qt_mode = {
+	DRM_SIMPLE_MODE(320, 240, 58, 43),
+};
+
+DEFINE_DRM_GEM_CMA_FOPS(mi0283qt_fops);
+
+static struct drm_driver mi0283qt_driver = {
+	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+	.fops			= &mi0283qt_fops,
+	.release		= mipi_dbi_release,
+	DRM_GEM_CMA_VMAP_DRIVER_OPS,
+	.debugfs_init		= mipi_dbi_debugfs_init,
+	.name			= "mi0283qt",
+	.desc			= "Multi-Inno MI0283QT",
+	.date			= "20160614",
+	.major			= 1,
+	.minor			= 0,
+};
+
+static const struct of_device_id mi0283qt_of_match[] = {
+	{ .compatible = "multi-inno,mi0283qt" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, mi0283qt_of_match);
+
+static const struct spi_device_id mi0283qt_id[] = {
+	{ "mi0283qt", 0 },
+	{ },
+};
+MODULE_DEVICE_TABLE(spi, mi0283qt_id);
+
+static int mi0283qt_probe(struct spi_device *spi)
+{
+	struct device *dev = &spi->dev;
+	struct mipi_dbi_dev *dbidev;
+	struct drm_device *drm;
+	struct mipi_dbi *dbi;
+	struct gpio_desc *dc;
+	u32 rotation = 0;
+	int ret;
+
+	dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
+	if (!dbidev)
+		return -ENOMEM;
+
+	dbi = &dbidev->dbi;
+	drm = &dbidev->drm;
+	ret = devm_drm_dev_init(dev, drm, &mi0283qt_driver);
+	if (ret) {
+		kfree(dbidev);
+		return ret;
+	}
+
+	drm_mode_config_init(drm);
+
+	dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(dbi->reset)) {
+		DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
+		return PTR_ERR(dbi->reset);
+	}
+
+	dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
+	if (IS_ERR(dc)) {
+		DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
+		return PTR_ERR(dc);
+	}
+
+	dbidev->regulator = devm_regulator_get(dev, "power");
+	if (IS_ERR(dbidev->regulator))
+		return PTR_ERR(dbidev->regulator);
+
+	dbidev->backlight = devm_of_find_backlight(dev);
+	if (IS_ERR(dbidev->backlight))
+		return PTR_ERR(dbidev->backlight);
+
+	device_property_read_u32(dev, "rotation", &rotation);
+
+	ret = mipi_dbi_spi_init(spi, dbi, dc);
+	if (ret)
+		return ret;
+
+	ret = mipi_dbi_dev_init(dbidev, &mi0283qt_pipe_funcs, &mi0283qt_mode, rotation);
+	if (ret)
+		return ret;
+
+	drm_mode_config_reset(drm);
+
+	ret = drm_dev_register(drm, 0);
+	if (ret)
+		return ret;
+
+	spi_set_drvdata(spi, drm);
+
+	drm_fbdev_generic_setup(drm, 0);
+
+	return 0;
+}
+
+static int mi0283qt_remove(struct spi_device *spi)
+{
+	struct drm_device *drm = spi_get_drvdata(spi);
+
+	drm_dev_unplug(drm);
+	drm_atomic_helper_shutdown(drm);
+
+	return 0;
+}
+
+static void mi0283qt_shutdown(struct spi_device *spi)
+{
+	drm_atomic_helper_shutdown(spi_get_drvdata(spi));
+}
+
+static int __maybe_unused mi0283qt_pm_suspend(struct device *dev)
+{
+	return drm_mode_config_helper_suspend(dev_get_drvdata(dev));
+}
+
+static int __maybe_unused mi0283qt_pm_resume(struct device *dev)
+{
+	drm_mode_config_helper_resume(dev_get_drvdata(dev));
+
+	return 0;
+}
+
+static const struct dev_pm_ops mi0283qt_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(mi0283qt_pm_suspend, mi0283qt_pm_resume)
+};
+
+static struct spi_driver mi0283qt_spi_driver = {
+	.driver = {
+		.name = "mi0283qt",
+		.owner = THIS_MODULE,
+		.of_match_table = mi0283qt_of_match,
+		.pm = &mi0283qt_pm_ops,
+	},
+	.id_table = mi0283qt_id,
+	.probe = mi0283qt_probe,
+	.remove = mi0283qt_remove,
+	.shutdown = mi0283qt_shutdown,
+};
+module_spi_driver(mi0283qt_spi_driver);
+
+MODULE_DESCRIPTION("Multi-Inno MI0283QT DRM driver");
+MODULE_AUTHOR("Noralf Trønnes");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/tiny/repaper.c b/drivers/gpu/drm/tiny/repaper.c
new file mode 100644
index 000000000000..76d179200775
--- /dev/null
+++ b/drivers/gpu/drm/tiny/repaper.c
@@ -0,0 +1,1212 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * DRM driver for Pervasive Displays RePaper branded e-ink panels
+ *
+ * Copyright 2013-2017 Pervasive Displays, Inc.
+ * Copyright 2017 Noralf Trønnes
+ *
+ * The driver supports:
+ * Material Film: Aurora Mb (V231)
+ * Driver IC: G2 (eTC)
+ *
+ * The controller code was taken from the userspace driver:
+ * https://github.com/repaper/gratis
+ */
+
+#include <linux/delay.h>
+#include <linux/dma-buf.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/sched/clock.h>
+#include <linux/spi/spi.h>
+#include <linux/thermal.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_damage_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_format_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_rect.h>
+#include <drm/drm_vblank.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+
+#define REPAPER_RID_G2_COG_ID	0x12
+
+enum repaper_model {
+	E1144CS021 = 1,
+	E1190CS021,
+	E2200CS021,
+	E2271CS021,
+};
+
+enum repaper_stage {         /* Image pixel -> Display pixel */
+	REPAPER_COMPENSATE,  /* B -> W, W -> B (Current Image) */
+	REPAPER_WHITE,       /* B -> N, W -> W (Current Image) */
+	REPAPER_INVERSE,     /* B -> N, W -> B (New Image) */
+	REPAPER_NORMAL       /* B -> B, W -> W (New Image) */
+};
+
+enum repaper_epd_border_byte {
+	REPAPER_BORDER_BYTE_NONE,
+	REPAPER_BORDER_BYTE_ZERO,
+	REPAPER_BORDER_BYTE_SET,
+};
+
+struct repaper_epd {
+	struct drm_device drm;
+	struct drm_simple_display_pipe pipe;
+	const struct drm_display_mode *mode;
+	struct drm_connector connector;
+	struct spi_device *spi;
+
+	struct gpio_desc *panel_on;
+	struct gpio_desc *border;
+	struct gpio_desc *discharge;
+	struct gpio_desc *reset;
+	struct gpio_desc *busy;
+
+	struct thermal_zone_device *thermal;
+
+	unsigned int height;
+	unsigned int width;
+	unsigned int bytes_per_scan;
+	const u8 *channel_select;
+	unsigned int stage_time;
+	unsigned int factored_stage_time;
+	bool middle_scan;
+	bool pre_border_byte;
+	enum repaper_epd_border_byte border_byte;
+
+	u8 *line_buffer;
+	void *current_frame;
+
+	bool enabled;
+	bool cleared;
+	bool partial;
+};
+
+static inline struct repaper_epd *drm_to_epd(struct drm_device *drm)
+{
+	return container_of(drm, struct repaper_epd, drm);
+}
+
+static int repaper_spi_transfer(struct spi_device *spi, u8 header,
+				const void *tx, void *rx, size_t len)
+{
+	void *txbuf = NULL, *rxbuf = NULL;
+	struct spi_transfer tr[2] = {};
+	u8 *headerbuf;
+	int ret;
+
+	headerbuf = kmalloc(1, GFP_KERNEL);
+	if (!headerbuf)
+		return -ENOMEM;
+
+	headerbuf[0] = header;
+	tr[0].tx_buf = headerbuf;
+	tr[0].len = 1;
+
+	/* Stack allocated tx? */
+	if (tx && len <= 32) {
+		txbuf = kmemdup(tx, len, GFP_KERNEL);
+		if (!txbuf) {
+			ret = -ENOMEM;
+			goto out_free;
+		}
+	}
+
+	if (rx) {
+		rxbuf = kmalloc(len, GFP_KERNEL);
+		if (!rxbuf) {
+			ret = -ENOMEM;
+			goto out_free;
+		}
+	}
+
+	tr[1].tx_buf = txbuf ? txbuf : tx;
+	tr[1].rx_buf = rxbuf;
+	tr[1].len = len;
+
+	ndelay(80);
+	ret = spi_sync_transfer(spi, tr, 2);
+	if (rx && !ret)
+		memcpy(rx, rxbuf, len);
+
+out_free:
+	kfree(headerbuf);
+	kfree(txbuf);
+	kfree(rxbuf);
+
+	return ret;
+}
+
+static int repaper_write_buf(struct spi_device *spi, u8 reg,
+			     const u8 *buf, size_t len)
+{
+	int ret;
+
+	ret = repaper_spi_transfer(spi, 0x70, &reg, NULL, 1);
+	if (ret)
+		return ret;
+
+	return repaper_spi_transfer(spi, 0x72, buf, NULL, len);
+}
+
+static int repaper_write_val(struct spi_device *spi, u8 reg, u8 val)
+{
+	return repaper_write_buf(spi, reg, &val, 1);
+}
+
+static int repaper_read_val(struct spi_device *spi, u8 reg)
+{
+	int ret;
+	u8 val;
+
+	ret = repaper_spi_transfer(spi, 0x70, &reg, NULL, 1);
+	if (ret)
+		return ret;
+
+	ret = repaper_spi_transfer(spi, 0x73, NULL, &val, 1);
+
+	return ret ? ret : val;
+}
+
+static int repaper_read_id(struct spi_device *spi)
+{
+	int ret;
+	u8 id;
+
+	ret = repaper_spi_transfer(spi, 0x71, NULL, &id, 1);
+
+	return ret ? ret : id;
+}
+
+static void repaper_spi_mosi_low(struct spi_device *spi)
+{
+	const u8 buf[1] = { 0 };
+
+	spi_write(spi, buf, 1);
+}
+
+/* pixels on display are numbered from 1 so even is actually bits 1,3,5,... */
+static void repaper_even_pixels(struct repaper_epd *epd, u8 **pp,
+				const u8 *data, u8 fixed_value, const u8 *mask,
+				enum repaper_stage stage)
+{
+	unsigned int b;
+
+	for (b = 0; b < (epd->width / 8); b++) {
+		if (data) {
+			u8 pixels = data[b] & 0xaa;
+			u8 pixel_mask = 0xff;
+			u8 p1, p2, p3, p4;
+
+			if (mask) {
+				pixel_mask = (mask[b] ^ pixels) & 0xaa;
+				pixel_mask |= pixel_mask >> 1;
+			}
+
+			switch (stage) {
+			case REPAPER_COMPENSATE: /* B -> W, W -> B (Current) */
+				pixels = 0xaa | ((pixels ^ 0xaa) >> 1);
+				break;
+			case REPAPER_WHITE:      /* B -> N, W -> W (Current) */
+				pixels = 0x55 + ((pixels ^ 0xaa) >> 1);
+				break;
+			case REPAPER_INVERSE:    /* B -> N, W -> B (New) */
+				pixels = 0x55 | (pixels ^ 0xaa);
+				break;
+			case REPAPER_NORMAL:     /* B -> B, W -> W (New) */
+				pixels = 0xaa | (pixels >> 1);
+				break;
+			}
+
+			pixels = (pixels & pixel_mask) | (~pixel_mask & 0x55);
+			p1 = (pixels >> 6) & 0x03;
+			p2 = (pixels >> 4) & 0x03;
+			p3 = (pixels >> 2) & 0x03;
+			p4 = (pixels >> 0) & 0x03;
+			pixels = (p1 << 0) | (p2 << 2) | (p3 << 4) | (p4 << 6);
+			*(*pp)++ = pixels;
+		} else {
+			*(*pp)++ = fixed_value;
+		}
+	}
+}
+
+/* pixels on display are numbered from 1 so odd is actually bits 0,2,4,... */
+static void repaper_odd_pixels(struct repaper_epd *epd, u8 **pp,
+			       const u8 *data, u8 fixed_value, const u8 *mask,
+			       enum repaper_stage stage)
+{
+	unsigned int b;
+
+	for (b = epd->width / 8; b > 0; b--) {
+		if (data) {
+			u8 pixels = data[b - 1] & 0x55;
+			u8 pixel_mask = 0xff;
+
+			if (mask) {
+				pixel_mask = (mask[b - 1] ^ pixels) & 0x55;
+				pixel_mask |= pixel_mask << 1;
+			}
+
+			switch (stage) {
+			case REPAPER_COMPENSATE: /* B -> W, W -> B (Current) */
+				pixels = 0xaa | (pixels ^ 0x55);
+				break;
+			case REPAPER_WHITE:      /* B -> N, W -> W (Current) */
+				pixels = 0x55 + (pixels ^ 0x55);
+				break;
+			case REPAPER_INVERSE:    /* B -> N, W -> B (New) */
+				pixels = 0x55 | ((pixels ^ 0x55) << 1);
+				break;
+			case REPAPER_NORMAL:     /* B -> B, W -> W (New) */
+				pixels = 0xaa | pixels;
+				break;
+			}
+
+			pixels = (pixels & pixel_mask) | (~pixel_mask & 0x55);
+			*(*pp)++ = pixels;
+		} else {
+			*(*pp)++ = fixed_value;
+		}
+	}
+}
+
+/* interleave bits: (byte)76543210 -> (16 bit).7.6.5.4.3.2.1 */
+static inline u16 repaper_interleave_bits(u16 value)
+{
+	value = (value | (value << 4)) & 0x0f0f;
+	value = (value | (value << 2)) & 0x3333;
+	value = (value | (value << 1)) & 0x5555;
+
+	return value;
+}
+
+/* pixels on display are numbered from 1 */
+static void repaper_all_pixels(struct repaper_epd *epd, u8 **pp,
+			       const u8 *data, u8 fixed_value, const u8 *mask,
+			       enum repaper_stage stage)
+{
+	unsigned int b;
+
+	for (b = epd->width / 8; b > 0; b--) {
+		if (data) {
+			u16 pixels = repaper_interleave_bits(data[b - 1]);
+			u16 pixel_mask = 0xffff;
+
+			if (mask) {
+				pixel_mask = repaper_interleave_bits(mask[b - 1]);
+
+				pixel_mask = (pixel_mask ^ pixels) & 0x5555;
+				pixel_mask |= pixel_mask << 1;
+			}
+
+			switch (stage) {
+			case REPAPER_COMPENSATE: /* B -> W, W -> B (Current) */
+				pixels = 0xaaaa | (pixels ^ 0x5555);
+				break;
+			case REPAPER_WHITE:      /* B -> N, W -> W (Current) */
+				pixels = 0x5555 + (pixels ^ 0x5555);
+				break;
+			case REPAPER_INVERSE:    /* B -> N, W -> B (New) */
+				pixels = 0x5555 | ((pixels ^ 0x5555) << 1);
+				break;
+			case REPAPER_NORMAL:     /* B -> B, W -> W (New) */
+				pixels = 0xaaaa | pixels;
+				break;
+			}
+
+			pixels = (pixels & pixel_mask) | (~pixel_mask & 0x5555);
+			*(*pp)++ = pixels >> 8;
+			*(*pp)++ = pixels;
+		} else {
+			*(*pp)++ = fixed_value;
+			*(*pp)++ = fixed_value;
+		}
+	}
+}
+
+/* output one line of scan and data bytes to the display */
+static void repaper_one_line(struct repaper_epd *epd, unsigned int line,
+			     const u8 *data, u8 fixed_value, const u8 *mask,
+			     enum repaper_stage stage)
+{
+	u8 *p = epd->line_buffer;
+	unsigned int b;
+
+	repaper_spi_mosi_low(epd->spi);
+
+	if (epd->pre_border_byte)
+		*p++ = 0x00;
+
+	if (epd->middle_scan) {
+		/* data bytes */
+		repaper_odd_pixels(epd, &p, data, fixed_value, mask, stage);
+
+		/* scan line */
+		for (b = epd->bytes_per_scan; b > 0; b--) {
+			if (line / 4 == b - 1)
+				*p++ = 0x03 << (2 * (line & 0x03));
+			else
+				*p++ = 0x00;
+		}
+
+		/* data bytes */
+		repaper_even_pixels(epd, &p, data, fixed_value, mask, stage);
+	} else {
+		/*
+		 * even scan line, but as lines on display are numbered from 1,
+		 * line: 1,3,5,...
+		 */
+		for (b = 0; b < epd->bytes_per_scan; b++) {
+			if (0 != (line & 0x01) && line / 8 == b)
+				*p++ = 0xc0 >> (line & 0x06);
+			else
+				*p++ = 0x00;
+		}
+
+		/* data bytes */
+		repaper_all_pixels(epd, &p, data, fixed_value, mask, stage);
+
+		/*
+		 * odd scan line, but as lines on display are numbered from 1,
+		 * line: 0,2,4,6,...
+		 */
+		for (b = epd->bytes_per_scan; b > 0; b--) {
+			if (0 == (line & 0x01) && line / 8 == b - 1)
+				*p++ = 0x03 << (line & 0x06);
+			else
+				*p++ = 0x00;
+		}
+	}
+
+	switch (epd->border_byte) {
+	case REPAPER_BORDER_BYTE_NONE:
+		break;
+
+	case REPAPER_BORDER_BYTE_ZERO:
+		*p++ = 0x00;
+		break;
+
+	case REPAPER_BORDER_BYTE_SET:
+		switch (stage) {
+		case REPAPER_COMPENSATE:
+		case REPAPER_WHITE:
+		case REPAPER_INVERSE:
+			*p++ = 0x00;
+			break;
+		case REPAPER_NORMAL:
+			*p++ = 0xaa;
+			break;
+		}
+		break;
+	}
+
+	repaper_write_buf(epd->spi, 0x0a, epd->line_buffer,
+			  p - epd->line_buffer);
+
+	/* Output data to panel */
+	repaper_write_val(epd->spi, 0x02, 0x07);
+
+	repaper_spi_mosi_low(epd->spi);
+}
+
+static void repaper_frame_fixed(struct repaper_epd *epd, u8 fixed_value,
+				enum repaper_stage stage)
+{
+	unsigned int line;
+
+	for (line = 0; line < epd->height; line++)
+		repaper_one_line(epd, line, NULL, fixed_value, NULL, stage);
+}
+
+static void repaper_frame_data(struct repaper_epd *epd, const u8 *image,
+			       const u8 *mask, enum repaper_stage stage)
+{
+	unsigned int line;
+
+	if (!mask) {
+		for (line = 0; line < epd->height; line++) {
+			repaper_one_line(epd, line,
+					 &image[line * (epd->width / 8)],
+					 0, NULL, stage);
+		}
+	} else {
+		for (line = 0; line < epd->height; line++) {
+			size_t n = line * epd->width / 8;
+
+			repaper_one_line(epd, line, &image[n], 0, &mask[n],
+					 stage);
+		}
+	}
+}
+
+static void repaper_frame_fixed_repeat(struct repaper_epd *epd, u8 fixed_value,
+				       enum repaper_stage stage)
+{
+	u64 start = local_clock();
+	u64 end = start + (epd->factored_stage_time * 1000 * 1000);
+
+	do {
+		repaper_frame_fixed(epd, fixed_value, stage);
+	} while (local_clock() < end);
+}
+
+static void repaper_frame_data_repeat(struct repaper_epd *epd, const u8 *image,
+				      const u8 *mask, enum repaper_stage stage)
+{
+	u64 start = local_clock();
+	u64 end = start + (epd->factored_stage_time * 1000 * 1000);
+
+	do {
+		repaper_frame_data(epd, image, mask, stage);
+	} while (local_clock() < end);
+}
+
+static void repaper_get_temperature(struct repaper_epd *epd)
+{
+	int ret, temperature = 0;
+	unsigned int factor10x;
+
+	if (!epd->thermal)
+		return;
+
+	ret = thermal_zone_get_temp(epd->thermal, &temperature);
+	if (ret) {
+		DRM_DEV_ERROR(&epd->spi->dev, "Failed to get temperature (%d)\n", ret);
+		return;
+	}
+
+	temperature /= 1000;
+
+	if (temperature <= -10)
+		factor10x = 170;
+	else if (temperature <= -5)
+		factor10x = 120;
+	else if (temperature <= 5)
+		factor10x = 80;
+	else if (temperature <= 10)
+		factor10x = 40;
+	else if (temperature <= 15)
+		factor10x = 30;
+	else if (temperature <= 20)
+		factor10x = 20;
+	else if (temperature <= 40)
+		factor10x = 10;
+	else
+		factor10x = 7;
+
+	epd->factored_stage_time = epd->stage_time * factor10x / 10;
+}
+
+static void repaper_gray8_to_mono_reversed(u8 *buf, u32 width, u32 height)
+{
+	u8 *gray8 = buf, *mono = buf;
+	int y, xb, i;
+
+	for (y = 0; y < height; y++)
+		for (xb = 0; xb < width / 8; xb++) {
+			u8 byte = 0x00;
+
+			for (i = 0; i < 8; i++) {
+				int x = xb * 8 + i;
+
+				byte >>= 1;
+				if (gray8[y * width + x] >> 7)
+					byte |= BIT(7);
+			}
+			*mono++ = byte;
+		}
+}
+
+static int repaper_fb_dirty(struct drm_framebuffer *fb)
+{
+	struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
+	struct dma_buf_attachment *import_attach = cma_obj->base.import_attach;
+	struct repaper_epd *epd = drm_to_epd(fb->dev);
+	struct drm_rect clip;
+	int idx, ret = 0;
+	u8 *buf = NULL;
+
+	if (!epd->enabled)
+		return 0;
+
+	if (!drm_dev_enter(fb->dev, &idx))
+		return -ENODEV;
+
+	/* repaper can't do partial updates */
+	clip.x1 = 0;
+	clip.x2 = fb->width;
+	clip.y1 = 0;
+	clip.y2 = fb->height;
+
+	repaper_get_temperature(epd);
+
+	DRM_DEBUG("Flushing [FB:%d] st=%ums\n", fb->base.id,
+		  epd->factored_stage_time);
+
+	buf = kmalloc_array(fb->width, fb->height, GFP_KERNEL);
+	if (!buf) {
+		ret = -ENOMEM;
+		goto out_exit;
+	}
+
+	if (import_attach) {
+		ret = dma_buf_begin_cpu_access(import_attach->dmabuf,
+					       DMA_FROM_DEVICE);
+		if (ret)
+			goto out_free;
+	}
+
+	drm_fb_xrgb8888_to_gray8(buf, cma_obj->vaddr, fb, &clip);
+
+	if (import_attach) {
+		ret = dma_buf_end_cpu_access(import_attach->dmabuf,
+					     DMA_FROM_DEVICE);
+		if (ret)
+			goto out_free;
+	}
+
+	repaper_gray8_to_mono_reversed(buf, fb->width, fb->height);
+
+	if (epd->partial) {
+		repaper_frame_data_repeat(epd, buf, epd->current_frame,
+					  REPAPER_NORMAL);
+	} else if (epd->cleared) {
+		repaper_frame_data_repeat(epd, epd->current_frame, NULL,
+					  REPAPER_COMPENSATE);
+		repaper_frame_data_repeat(epd, epd->current_frame, NULL,
+					  REPAPER_WHITE);
+		repaper_frame_data_repeat(epd, buf, NULL, REPAPER_INVERSE);
+		repaper_frame_data_repeat(epd, buf, NULL, REPAPER_NORMAL);
+
+		epd->partial = true;
+	} else {
+		/* Clear display (anything -> white) */
+		repaper_frame_fixed_repeat(epd, 0xff, REPAPER_COMPENSATE);
+		repaper_frame_fixed_repeat(epd, 0xff, REPAPER_WHITE);
+		repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_INVERSE);
+		repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_NORMAL);
+
+		/* Assuming a clear (white) screen output an image */
+		repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_COMPENSATE);
+		repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_WHITE);
+		repaper_frame_data_repeat(epd, buf, NULL, REPAPER_INVERSE);
+		repaper_frame_data_repeat(epd, buf, NULL, REPAPER_NORMAL);
+
+		epd->cleared = true;
+		epd->partial = true;
+	}
+
+	memcpy(epd->current_frame, buf, fb->width * fb->height / 8);
+
+	/*
+	 * An extra frame write is needed if pixels are set in the bottom line,
+	 * or else grey lines rises up from the pixels
+	 */
+	if (epd->pre_border_byte) {
+		unsigned int x;
+
+		for (x = 0; x < (fb->width / 8); x++)
+			if (buf[x + (fb->width * (fb->height - 1) / 8)]) {
+				repaper_frame_data_repeat(epd, buf,
+							  epd->current_frame,
+							  REPAPER_NORMAL);
+				break;
+			}
+	}
+
+out_free:
+	kfree(buf);
+out_exit:
+	drm_dev_exit(idx);
+
+	return ret;
+}
+
+static void power_off(struct repaper_epd *epd)
+{
+	/* Turn off power and all signals */
+	gpiod_set_value_cansleep(epd->reset, 0);
+	gpiod_set_value_cansleep(epd->panel_on, 0);
+	if (epd->border)
+		gpiod_set_value_cansleep(epd->border, 0);
+
+	/* Ensure SPI MOSI and CLOCK are Low before CS Low */
+	repaper_spi_mosi_low(epd->spi);
+
+	/* Discharge pulse */
+	gpiod_set_value_cansleep(epd->discharge, 1);
+	msleep(150);
+	gpiod_set_value_cansleep(epd->discharge, 0);
+}
+
+static void repaper_pipe_enable(struct drm_simple_display_pipe *pipe,
+				struct drm_crtc_state *crtc_state,
+				struct drm_plane_state *plane_state)
+{
+	struct repaper_epd *epd = drm_to_epd(pipe->crtc.dev);
+	struct spi_device *spi = epd->spi;
+	struct device *dev = &spi->dev;
+	bool dc_ok = false;
+	int i, ret, idx;
+
+	if (!drm_dev_enter(pipe->crtc.dev, &idx))
+		return;
+
+	DRM_DEBUG_DRIVER("\n");
+
+	/* Power up sequence */
+	gpiod_set_value_cansleep(epd->reset, 0);
+	gpiod_set_value_cansleep(epd->panel_on, 0);
+	gpiod_set_value_cansleep(epd->discharge, 0);
+	if (epd->border)
+		gpiod_set_value_cansleep(epd->border, 0);
+	repaper_spi_mosi_low(spi);
+	usleep_range(5000, 10000);
+
+	gpiod_set_value_cansleep(epd->panel_on, 1);
+	/*
+	 * This delay comes from the repaper.org userspace driver, it's not
+	 * mentioned in the datasheet.
+	 */
+	usleep_range(10000, 15000);
+	gpiod_set_value_cansleep(epd->reset, 1);
+	if (epd->border)
+		gpiod_set_value_cansleep(epd->border, 1);
+	usleep_range(5000, 10000);
+	gpiod_set_value_cansleep(epd->reset, 0);
+	usleep_range(5000, 10000);
+	gpiod_set_value_cansleep(epd->reset, 1);
+	usleep_range(5000, 10000);
+
+	/* Wait for COG to become ready */
+	for (i = 100; i > 0; i--) {
+		if (!gpiod_get_value_cansleep(epd->busy))
+			break;
+
+		usleep_range(10, 100);
+	}
+
+	if (!i) {
+		DRM_DEV_ERROR(dev, "timeout waiting for panel to become ready.\n");
+		power_off(epd);
+		goto out_exit;
+	}
+
+	repaper_read_id(spi);
+	ret = repaper_read_id(spi);
+	if (ret != REPAPER_RID_G2_COG_ID) {
+		if (ret < 0)
+			dev_err(dev, "failed to read chip (%d)\n", ret);
+		else
+			dev_err(dev, "wrong COG ID 0x%02x\n", ret);
+		power_off(epd);
+		goto out_exit;
+	}
+
+	/* Disable OE */
+	repaper_write_val(spi, 0x02, 0x40);
+
+	ret = repaper_read_val(spi, 0x0f);
+	if (ret < 0 || !(ret & 0x80)) {
+		if (ret < 0)
+			DRM_DEV_ERROR(dev, "failed to read chip (%d)\n", ret);
+		else
+			DRM_DEV_ERROR(dev, "panel is reported broken\n");
+		power_off(epd);
+		goto out_exit;
+	}
+
+	/* Power saving mode */
+	repaper_write_val(spi, 0x0b, 0x02);
+	/* Channel select */
+	repaper_write_buf(spi, 0x01, epd->channel_select, 8);
+	/* High power mode osc */
+	repaper_write_val(spi, 0x07, 0xd1);
+	/* Power setting */
+	repaper_write_val(spi, 0x08, 0x02);
+	/* Vcom level */
+	repaper_write_val(spi, 0x09, 0xc2);
+	/* Power setting */
+	repaper_write_val(spi, 0x04, 0x03);
+	/* Driver latch on */
+	repaper_write_val(spi, 0x03, 0x01);
+	/* Driver latch off */
+	repaper_write_val(spi, 0x03, 0x00);
+	usleep_range(5000, 10000);
+
+	/* Start chargepump */
+	for (i = 0; i < 4; ++i) {
+		/* Charge pump positive voltage on - VGH/VDL on */
+		repaper_write_val(spi, 0x05, 0x01);
+		msleep(240);
+
+		/* Charge pump negative voltage on - VGL/VDL on */
+		repaper_write_val(spi, 0x05, 0x03);
+		msleep(40);
+
+		/* Charge pump Vcom on - Vcom driver on */
+		repaper_write_val(spi, 0x05, 0x0f);
+		msleep(40);
+
+		/* check DC/DC */
+		ret = repaper_read_val(spi, 0x0f);
+		if (ret < 0) {
+			DRM_DEV_ERROR(dev, "failed to read chip (%d)\n", ret);
+			power_off(epd);
+			goto out_exit;
+		}
+
+		if (ret & 0x40) {
+			dc_ok = true;
+			break;
+		}
+	}
+
+	if (!dc_ok) {
+		DRM_DEV_ERROR(dev, "dc/dc failed\n");
+		power_off(epd);
+		goto out_exit;
+	}
+
+	/*
+	 * Output enable to disable
+	 * The userspace driver sets this to 0x04, but the datasheet says 0x06
+	 */
+	repaper_write_val(spi, 0x02, 0x04);
+
+	epd->enabled = true;
+	epd->partial = false;
+out_exit:
+	drm_dev_exit(idx);
+}
+
+static void repaper_pipe_disable(struct drm_simple_display_pipe *pipe)
+{
+	struct repaper_epd *epd = drm_to_epd(pipe->crtc.dev);
+	struct spi_device *spi = epd->spi;
+	unsigned int line;
+
+	/*
+	 * This callback is not protected by drm_dev_enter/exit since we want to
+	 * turn off the display on regular driver unload. It's highly unlikely
+	 * that the underlying SPI controller is gone should this be called after
+	 * unplug.
+	 */
+
+	if (!epd->enabled)
+		return;
+
+	DRM_DEBUG_DRIVER("\n");
+
+	epd->enabled = false;
+
+	/* Nothing frame */
+	for (line = 0; line < epd->height; line++)
+		repaper_one_line(epd, 0x7fffu, NULL, 0x00, NULL,
+				 REPAPER_COMPENSATE);
+
+	/* 2.7" */
+	if (epd->border) {
+		/* Dummy line */
+		repaper_one_line(epd, 0x7fffu, NULL, 0x00, NULL,
+				 REPAPER_COMPENSATE);
+		msleep(25);
+		gpiod_set_value_cansleep(epd->border, 0);
+		msleep(200);
+		gpiod_set_value_cansleep(epd->border, 1);
+	} else {
+		/* Border dummy line */
+		repaper_one_line(epd, 0x7fffu, NULL, 0x00, NULL,
+				 REPAPER_NORMAL);
+		msleep(200);
+	}
+
+	/* not described in datasheet */
+	repaper_write_val(spi, 0x0b, 0x00);
+	/* Latch reset turn on */
+	repaper_write_val(spi, 0x03, 0x01);
+	/* Power off charge pump Vcom */
+	repaper_write_val(spi, 0x05, 0x03);
+	/* Power off charge pump neg voltage */
+	repaper_write_val(spi, 0x05, 0x01);
+	msleep(120);
+	/* Discharge internal */
+	repaper_write_val(spi, 0x04, 0x80);
+	/* turn off all charge pumps */
+	repaper_write_val(spi, 0x05, 0x00);
+	/* Turn off osc */
+	repaper_write_val(spi, 0x07, 0x01);
+	msleep(50);
+
+	power_off(epd);
+}
+
+static void repaper_pipe_update(struct drm_simple_display_pipe *pipe,
+				struct drm_plane_state *old_state)
+{
+	struct drm_plane_state *state = pipe->plane.state;
+	struct drm_crtc *crtc = &pipe->crtc;
+	struct drm_rect rect;
+
+	if (drm_atomic_helper_damage_merged(old_state, state, &rect))
+		repaper_fb_dirty(state->fb);
+
+	if (crtc->state->event) {
+		spin_lock_irq(&crtc->dev->event_lock);
+		drm_crtc_send_vblank_event(crtc, crtc->state->event);
+		spin_unlock_irq(&crtc->dev->event_lock);
+		crtc->state->event = NULL;
+	}
+}
+
+static const struct drm_simple_display_pipe_funcs repaper_pipe_funcs = {
+	.enable = repaper_pipe_enable,
+	.disable = repaper_pipe_disable,
+	.update = repaper_pipe_update,
+	.prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
+};
+
+static int repaper_connector_get_modes(struct drm_connector *connector)
+{
+	struct repaper_epd *epd = drm_to_epd(connector->dev);
+	struct drm_display_mode *mode;
+
+	mode = drm_mode_duplicate(connector->dev, epd->mode);
+	if (!mode) {
+		DRM_ERROR("Failed to duplicate mode\n");
+		return 0;
+	}
+
+	drm_mode_set_name(mode);
+	mode->type |= DRM_MODE_TYPE_PREFERRED;
+	drm_mode_probed_add(connector, mode);
+
+	connector->display_info.width_mm = mode->width_mm;
+	connector->display_info.height_mm = mode->height_mm;
+
+	return 1;
+}
+
+static const struct drm_connector_helper_funcs repaper_connector_hfuncs = {
+	.get_modes = repaper_connector_get_modes,
+};
+
+static const struct drm_connector_funcs repaper_connector_funcs = {
+	.reset = drm_atomic_helper_connector_reset,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.destroy = drm_connector_cleanup,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static const struct drm_mode_config_funcs repaper_mode_config_funcs = {
+	.fb_create = drm_gem_fb_create_with_dirty,
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
+};
+
+static void repaper_release(struct drm_device *drm)
+{
+	struct repaper_epd *epd = drm_to_epd(drm);
+
+	DRM_DEBUG_DRIVER("\n");
+
+	drm_mode_config_cleanup(drm);
+	drm_dev_fini(drm);
+	kfree(epd);
+}
+
+static const uint32_t repaper_formats[] = {
+	DRM_FORMAT_XRGB8888,
+};
+
+static const struct drm_display_mode repaper_e1144cs021_mode = {
+	DRM_SIMPLE_MODE(128, 96, 29, 22),
+};
+
+static const u8 repaper_e1144cs021_cs[] = { 0x00, 0x00, 0x00, 0x00,
+					    0x00, 0x0f, 0xff, 0x00 };
+
+static const struct drm_display_mode repaper_e1190cs021_mode = {
+	DRM_SIMPLE_MODE(144, 128, 36, 32),
+};
+
+static const u8 repaper_e1190cs021_cs[] = { 0x00, 0x00, 0x00, 0x03,
+					    0xfc, 0x00, 0x00, 0xff };
+
+static const struct drm_display_mode repaper_e2200cs021_mode = {
+	DRM_SIMPLE_MODE(200, 96, 46, 22),
+};
+
+static const u8 repaper_e2200cs021_cs[] = { 0x00, 0x00, 0x00, 0x00,
+					    0x01, 0xff, 0xe0, 0x00 };
+
+static const struct drm_display_mode repaper_e2271cs021_mode = {
+	DRM_SIMPLE_MODE(264, 176, 57, 38),
+};
+
+static const u8 repaper_e2271cs021_cs[] = { 0x00, 0x00, 0x00, 0x7f,
+					    0xff, 0xfe, 0x00, 0x00 };
+
+DEFINE_DRM_GEM_CMA_FOPS(repaper_fops);
+
+static struct drm_driver repaper_driver = {
+	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+	.fops			= &repaper_fops,
+	.release		= repaper_release,
+	DRM_GEM_CMA_VMAP_DRIVER_OPS,
+	.name			= "repaper",
+	.desc			= "Pervasive Displays RePaper e-ink panels",
+	.date			= "20170405",
+	.major			= 1,
+	.minor			= 0,
+};
+
+static const struct of_device_id repaper_of_match[] = {
+	{ .compatible = "pervasive,e1144cs021", .data = (void *)E1144CS021 },
+	{ .compatible = "pervasive,e1190cs021", .data = (void *)E1190CS021 },
+	{ .compatible = "pervasive,e2200cs021", .data = (void *)E2200CS021 },
+	{ .compatible = "pervasive,e2271cs021", .data = (void *)E2271CS021 },
+	{},
+};
+MODULE_DEVICE_TABLE(of, repaper_of_match);
+
+static const struct spi_device_id repaper_id[] = {
+	{ "e1144cs021", E1144CS021 },
+	{ "e1190cs021", E1190CS021 },
+	{ "e2200cs021", E2200CS021 },
+	{ "e2271cs021", E2271CS021 },
+	{ },
+};
+MODULE_DEVICE_TABLE(spi, repaper_id);
+
+static int repaper_probe(struct spi_device *spi)
+{
+	const struct drm_display_mode *mode;
+	const struct spi_device_id *spi_id;
+	const struct of_device_id *match;
+	struct device *dev = &spi->dev;
+	enum repaper_model model;
+	const char *thermal_zone;
+	struct repaper_epd *epd;
+	size_t line_buffer_size;
+	struct drm_device *drm;
+	int ret;
+
+	match = of_match_device(repaper_of_match, dev);
+	if (match) {
+		model = (enum repaper_model)match->data;
+	} else {
+		spi_id = spi_get_device_id(spi);
+		model = spi_id->driver_data;
+	}
+
+	/* The SPI device is used to allocate dma memory */
+	if (!dev->coherent_dma_mask) {
+		ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
+		if (ret) {
+			dev_warn(dev, "Failed to set dma mask %d\n", ret);
+			return ret;
+		}
+	}
+
+	epd = kzalloc(sizeof(*epd), GFP_KERNEL);
+	if (!epd)
+		return -ENOMEM;
+
+	drm = &epd->drm;
+
+	ret = devm_drm_dev_init(dev, drm, &repaper_driver);
+	if (ret) {
+		kfree(epd);
+		return ret;
+	}
+
+	drm_mode_config_init(drm);
+	drm->mode_config.funcs = &repaper_mode_config_funcs;
+
+	epd->spi = spi;
+
+	epd->panel_on = devm_gpiod_get(dev, "panel-on", GPIOD_OUT_LOW);
+	if (IS_ERR(epd->panel_on)) {
+		ret = PTR_ERR(epd->panel_on);
+		if (ret != -EPROBE_DEFER)
+			DRM_DEV_ERROR(dev, "Failed to get gpio 'panel-on'\n");
+		return ret;
+	}
+
+	epd->discharge = devm_gpiod_get(dev, "discharge", GPIOD_OUT_LOW);
+	if (IS_ERR(epd->discharge)) {
+		ret = PTR_ERR(epd->discharge);
+		if (ret != -EPROBE_DEFER)
+			DRM_DEV_ERROR(dev, "Failed to get gpio 'discharge'\n");
+		return ret;
+	}
+
+	epd->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(epd->reset)) {
+		ret = PTR_ERR(epd->reset);
+		if (ret != -EPROBE_DEFER)
+			DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
+		return ret;
+	}
+
+	epd->busy = devm_gpiod_get(dev, "busy", GPIOD_IN);
+	if (IS_ERR(epd->busy)) {
+		ret = PTR_ERR(epd->busy);
+		if (ret != -EPROBE_DEFER)
+			DRM_DEV_ERROR(dev, "Failed to get gpio 'busy'\n");
+		return ret;
+	}
+
+	if (!device_property_read_string(dev, "pervasive,thermal-zone",
+					 &thermal_zone)) {
+		epd->thermal = thermal_zone_get_zone_by_name(thermal_zone);
+		if (IS_ERR(epd->thermal)) {
+			DRM_DEV_ERROR(dev, "Failed to get thermal zone: %s\n", thermal_zone);
+			return PTR_ERR(epd->thermal);
+		}
+	}
+
+	switch (model) {
+	case E1144CS021:
+		mode = &repaper_e1144cs021_mode;
+		epd->channel_select = repaper_e1144cs021_cs;
+		epd->stage_time = 480;
+		epd->bytes_per_scan = 96 / 4;
+		epd->middle_scan = true; /* data-scan-data */
+		epd->pre_border_byte = false;
+		epd->border_byte = REPAPER_BORDER_BYTE_ZERO;
+		break;
+
+	case E1190CS021:
+		mode = &repaper_e1190cs021_mode;
+		epd->channel_select = repaper_e1190cs021_cs;
+		epd->stage_time = 480;
+		epd->bytes_per_scan = 128 / 4 / 2;
+		epd->middle_scan = false; /* scan-data-scan */
+		epd->pre_border_byte = false;
+		epd->border_byte = REPAPER_BORDER_BYTE_SET;
+		break;
+
+	case E2200CS021:
+		mode = &repaper_e2200cs021_mode;
+		epd->channel_select = repaper_e2200cs021_cs;
+		epd->stage_time = 480;
+		epd->bytes_per_scan = 96 / 4;
+		epd->middle_scan = true; /* data-scan-data */
+		epd->pre_border_byte = true;
+		epd->border_byte = REPAPER_BORDER_BYTE_NONE;
+		break;
+
+	case E2271CS021:
+		epd->border = devm_gpiod_get(dev, "border", GPIOD_OUT_LOW);
+		if (IS_ERR(epd->border)) {
+			ret = PTR_ERR(epd->border);
+			if (ret != -EPROBE_DEFER)
+				DRM_DEV_ERROR(dev, "Failed to get gpio 'border'\n");
+			return ret;
+		}
+
+		mode = &repaper_e2271cs021_mode;
+		epd->channel_select = repaper_e2271cs021_cs;
+		epd->stage_time = 630;
+		epd->bytes_per_scan = 176 / 4;
+		epd->middle_scan = true; /* data-scan-data */
+		epd->pre_border_byte = true;
+		epd->border_byte = REPAPER_BORDER_BYTE_NONE;
+		break;
+
+	default:
+		return -ENODEV;
+	}
+
+	epd->mode = mode;
+	epd->width = mode->hdisplay;
+	epd->height = mode->vdisplay;
+	epd->factored_stage_time = epd->stage_time;
+
+	line_buffer_size = 2 * epd->width / 8 + epd->bytes_per_scan + 2;
+	epd->line_buffer = devm_kzalloc(dev, line_buffer_size, GFP_KERNEL);
+	if (!epd->line_buffer)
+		return -ENOMEM;
+
+	epd->current_frame = devm_kzalloc(dev, epd->width * epd->height / 8,
+					  GFP_KERNEL);
+	if (!epd->current_frame)
+		return -ENOMEM;
+
+	drm->mode_config.min_width = mode->hdisplay;
+	drm->mode_config.max_width = mode->hdisplay;
+	drm->mode_config.min_height = mode->vdisplay;
+	drm->mode_config.max_height = mode->vdisplay;
+
+	drm_connector_helper_add(&epd->connector, &repaper_connector_hfuncs);
+	ret = drm_connector_init(drm, &epd->connector, &repaper_connector_funcs,
+				 DRM_MODE_CONNECTOR_SPI);
+	if (ret)
+		return ret;
+
+	ret = drm_simple_display_pipe_init(drm, &epd->pipe, &repaper_pipe_funcs,
+					   repaper_formats, ARRAY_SIZE(repaper_formats),
+					   NULL, &epd->connector);
+	if (ret)
+		return ret;
+
+	drm_mode_config_reset(drm);
+
+	ret = drm_dev_register(drm, 0);
+	if (ret)
+		return ret;
+
+	spi_set_drvdata(spi, drm);
+
+	DRM_DEBUG_DRIVER("SPI speed: %uMHz\n", spi->max_speed_hz / 1000000);
+
+	drm_fbdev_generic_setup(drm, 0);
+
+	return 0;
+}
+
+static int repaper_remove(struct spi_device *spi)
+{
+	struct drm_device *drm = spi_get_drvdata(spi);
+
+	drm_dev_unplug(drm);
+	drm_atomic_helper_shutdown(drm);
+
+	return 0;
+}
+
+static void repaper_shutdown(struct spi_device *spi)
+{
+	drm_atomic_helper_shutdown(spi_get_drvdata(spi));
+}
+
+static struct spi_driver repaper_spi_driver = {
+	.driver = {
+		.name = "repaper",
+		.owner = THIS_MODULE,
+		.of_match_table = repaper_of_match,
+	},
+	.id_table = repaper_id,
+	.probe = repaper_probe,
+	.remove = repaper_remove,
+	.shutdown = repaper_shutdown,
+};
+module_spi_driver(repaper_spi_driver);
+
+MODULE_DESCRIPTION("Pervasive Displays RePaper DRM driver");
+MODULE_AUTHOR("Noralf Trønnes");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/tiny/st7586.c b/drivers/gpu/drm/tiny/st7586.c
new file mode 100644
index 000000000000..3cc21a1b30c8
--- /dev/null
+++ b/drivers/gpu/drm/tiny/st7586.c
@@ -0,0 +1,424 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * DRM driver for Sitronix ST7586 panels
+ *
+ * Copyright 2017 David Lechner <david@lechnology.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/dma-buf.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/spi/spi.h>
+#include <video/mipi_display.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_damage_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_format_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_mipi_dbi.h>
+#include <drm/drm_rect.h>
+#include <drm/drm_vblank.h>
+
+/* controller-specific commands */
+#define ST7586_DISP_MODE_GRAY	0x38
+#define ST7586_DISP_MODE_MONO	0x39
+#define ST7586_ENABLE_DDRAM	0x3a
+#define ST7586_SET_DISP_DUTY	0xb0
+#define ST7586_SET_PART_DISP	0xb4
+#define ST7586_SET_NLINE_INV	0xb5
+#define ST7586_SET_VOP		0xc0
+#define ST7586_SET_BIAS_SYSTEM	0xc3
+#define ST7586_SET_BOOST_LEVEL	0xc4
+#define ST7586_SET_VOP_OFFSET	0xc7
+#define ST7586_ENABLE_ANALOG	0xd0
+#define ST7586_AUTO_READ_CTRL	0xd7
+#define ST7586_OTP_RW_CTRL	0xe0
+#define ST7586_OTP_CTRL_OUT	0xe1
+#define ST7586_OTP_READ		0xe3
+
+#define ST7586_DISP_CTRL_MX	BIT(6)
+#define ST7586_DISP_CTRL_MY	BIT(7)
+
+/*
+ * The ST7586 controller has an unusual pixel format where 2bpp grayscale is
+ * packed 3 pixels per byte with the first two pixels using 3 bits and the 3rd
+ * pixel using only 2 bits.
+ *
+ * |  D7  |  D6  |  D5  ||      |      || 2bpp |
+ * | (D4) | (D3) | (D2) ||  D1  |  D0  || GRAY |
+ * +------+------+------++------+------++------+
+ * |  1   |  1   |  1   ||  1   |  1   || 0  0 | black
+ * |  1   |  0   |  0   ||  1   |  0   || 0  1 | dark gray
+ * |  0   |  1   |  0   ||  0   |  1   || 1  0 | light gray
+ * |  0   |  0   |  0   ||  0   |  0   || 1  1 | white
+ */
+
+static const u8 st7586_lookup[] = { 0x7, 0x4, 0x2, 0x0 };
+
+static void st7586_xrgb8888_to_gray332(u8 *dst, void *vaddr,
+				       struct drm_framebuffer *fb,
+				       struct drm_rect *clip)
+{
+	size_t len = (clip->x2 - clip->x1) * (clip->y2 - clip->y1);
+	unsigned int x, y;
+	u8 *src, *buf, val;
+
+	buf = kmalloc(len, GFP_KERNEL);
+	if (!buf)
+		return;
+
+	drm_fb_xrgb8888_to_gray8(buf, vaddr, fb, clip);
+	src = buf;
+
+	for (y = clip->y1; y < clip->y2; y++) {
+		for (x = clip->x1; x < clip->x2; x += 3) {
+			val = st7586_lookup[*src++ >> 6] << 5;
+			val |= st7586_lookup[*src++ >> 6] << 2;
+			val |= st7586_lookup[*src++ >> 6] >> 1;
+			*dst++ = val;
+		}
+	}
+
+	kfree(buf);
+}
+
+static int st7586_buf_copy(void *dst, struct drm_framebuffer *fb,
+			   struct drm_rect *clip)
+{
+	struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
+	struct dma_buf_attachment *import_attach = cma_obj->base.import_attach;
+	void *src = cma_obj->vaddr;
+	int ret = 0;
+
+	if (import_attach) {
+		ret = dma_buf_begin_cpu_access(import_attach->dmabuf,
+					       DMA_FROM_DEVICE);
+		if (ret)
+			return ret;
+	}
+
+	st7586_xrgb8888_to_gray332(dst, src, fb, clip);
+
+	if (import_attach)
+		ret = dma_buf_end_cpu_access(import_attach->dmabuf,
+					     DMA_FROM_DEVICE);
+
+	return ret;
+}
+
+static void st7586_fb_dirty(struct drm_framebuffer *fb, struct drm_rect *rect)
+{
+	struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(fb->dev);
+	struct mipi_dbi *dbi = &dbidev->dbi;
+	int start, end, idx, ret = 0;
+
+	if (!dbidev->enabled)
+		return;
+
+	if (!drm_dev_enter(fb->dev, &idx))
+		return;
+
+	/* 3 pixels per byte, so grow clip to nearest multiple of 3 */
+	rect->x1 = rounddown(rect->x1, 3);
+	rect->x2 = roundup(rect->x2, 3);
+
+	DRM_DEBUG_KMS("Flushing [FB:%d] " DRM_RECT_FMT "\n", fb->base.id, DRM_RECT_ARG(rect));
+
+	ret = st7586_buf_copy(dbidev->tx_buf, fb, rect);
+	if (ret)
+		goto err_msg;
+
+	/* Pixels are packed 3 per byte */
+	start = rect->x1 / 3;
+	end = rect->x2 / 3;
+
+	mipi_dbi_command(dbi, MIPI_DCS_SET_COLUMN_ADDRESS,
+			 (start >> 8) & 0xFF, start & 0xFF,
+			 (end >> 8) & 0xFF, (end - 1) & 0xFF);
+	mipi_dbi_command(dbi, MIPI_DCS_SET_PAGE_ADDRESS,
+			 (rect->y1 >> 8) & 0xFF, rect->y1 & 0xFF,
+			 (rect->y2 >> 8) & 0xFF, (rect->y2 - 1) & 0xFF);
+
+	ret = mipi_dbi_command_buf(dbi, MIPI_DCS_WRITE_MEMORY_START,
+				   (u8 *)dbidev->tx_buf,
+				   (end - start) * (rect->y2 - rect->y1));
+err_msg:
+	if (ret)
+		dev_err_once(fb->dev->dev, "Failed to update display %d\n", ret);
+
+	drm_dev_exit(idx);
+}
+
+static void st7586_pipe_update(struct drm_simple_display_pipe *pipe,
+			       struct drm_plane_state *old_state)
+{
+	struct drm_plane_state *state = pipe->plane.state;
+	struct drm_crtc *crtc = &pipe->crtc;
+	struct drm_rect rect;
+
+	if (drm_atomic_helper_damage_merged(old_state, state, &rect))
+		st7586_fb_dirty(state->fb, &rect);
+
+	if (crtc->state->event) {
+		spin_lock_irq(&crtc->dev->event_lock);
+		drm_crtc_send_vblank_event(crtc, crtc->state->event);
+		spin_unlock_irq(&crtc->dev->event_lock);
+		crtc->state->event = NULL;
+	}
+}
+
+static void st7586_pipe_enable(struct drm_simple_display_pipe *pipe,
+			       struct drm_crtc_state *crtc_state,
+			       struct drm_plane_state *plane_state)
+{
+	struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
+	struct drm_framebuffer *fb = plane_state->fb;
+	struct mipi_dbi *dbi = &dbidev->dbi;
+	struct drm_rect rect = {
+		.x1 = 0,
+		.x2 = fb->width,
+		.y1 = 0,
+		.y2 = fb->height,
+	};
+	int idx, ret;
+	u8 addr_mode;
+
+	if (!drm_dev_enter(pipe->crtc.dev, &idx))
+		return;
+
+	DRM_DEBUG_KMS("\n");
+
+	ret = mipi_dbi_poweron_reset(dbidev);
+	if (ret)
+		goto out_exit;
+
+	mipi_dbi_command(dbi, ST7586_AUTO_READ_CTRL, 0x9f);
+	mipi_dbi_command(dbi, ST7586_OTP_RW_CTRL, 0x00);
+
+	msleep(10);
+
+	mipi_dbi_command(dbi, ST7586_OTP_READ);
+
+	msleep(20);
+
+	mipi_dbi_command(dbi, ST7586_OTP_CTRL_OUT);
+	mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
+	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);
+
+	msleep(50);
+
+	mipi_dbi_command(dbi, ST7586_SET_VOP_OFFSET, 0x00);
+	mipi_dbi_command(dbi, ST7586_SET_VOP, 0xe3, 0x00);
+	mipi_dbi_command(dbi, ST7586_SET_BIAS_SYSTEM, 0x02);
+	mipi_dbi_command(dbi, ST7586_SET_BOOST_LEVEL, 0x04);
+	mipi_dbi_command(dbi, ST7586_ENABLE_ANALOG, 0x1d);
+	mipi_dbi_command(dbi, ST7586_SET_NLINE_INV, 0x00);
+	mipi_dbi_command(dbi, ST7586_DISP_MODE_GRAY);
+	mipi_dbi_command(dbi, ST7586_ENABLE_DDRAM, 0x02);
+
+	switch (dbidev->rotation) {
+	default:
+		addr_mode = 0x00;
+		break;
+	case 90:
+		addr_mode = ST7586_DISP_CTRL_MY;
+		break;
+	case 180:
+		addr_mode = ST7586_DISP_CTRL_MX | ST7586_DISP_CTRL_MY;
+		break;
+	case 270:
+		addr_mode = ST7586_DISP_CTRL_MX;
+		break;
+	}
+	mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
+
+	mipi_dbi_command(dbi, ST7586_SET_DISP_DUTY, 0x7f);
+	mipi_dbi_command(dbi, ST7586_SET_PART_DISP, 0xa0);
+	mipi_dbi_command(dbi, MIPI_DCS_SET_PARTIAL_AREA, 0x00, 0x00, 0x00, 0x77);
+	mipi_dbi_command(dbi, MIPI_DCS_EXIT_INVERT_MODE);
+
+	msleep(100);
+
+	dbidev->enabled = true;
+	st7586_fb_dirty(fb, &rect);
+
+	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
+out_exit:
+	drm_dev_exit(idx);
+}
+
+static void st7586_pipe_disable(struct drm_simple_display_pipe *pipe)
+{
+	struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
+
+	/*
+	 * This callback is not protected by drm_dev_enter/exit since we want to
+	 * turn off the display on regular driver unload. It's highly unlikely
+	 * that the underlying SPI controller is gone should this be called after
+	 * unplug.
+	 */
+
+	DRM_DEBUG_KMS("\n");
+
+	if (!dbidev->enabled)
+		return;
+
+	mipi_dbi_command(&dbidev->dbi, MIPI_DCS_SET_DISPLAY_OFF);
+	dbidev->enabled = false;
+}
+
+static const u32 st7586_formats[] = {
+	DRM_FORMAT_XRGB8888,
+};
+
+static const struct drm_simple_display_pipe_funcs st7586_pipe_funcs = {
+	.enable		= st7586_pipe_enable,
+	.disable	= st7586_pipe_disable,
+	.update		= st7586_pipe_update,
+	.prepare_fb	= drm_gem_fb_simple_display_pipe_prepare_fb,
+};
+
+static const struct drm_display_mode st7586_mode = {
+	DRM_SIMPLE_MODE(178, 128, 37, 27),
+};
+
+DEFINE_DRM_GEM_CMA_FOPS(st7586_fops);
+
+static struct drm_driver st7586_driver = {
+	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+	.fops			= &st7586_fops,
+	.release		= mipi_dbi_release,
+	DRM_GEM_CMA_VMAP_DRIVER_OPS,
+	.debugfs_init		= mipi_dbi_debugfs_init,
+	.name			= "st7586",
+	.desc			= "Sitronix ST7586",
+	.date			= "20170801",
+	.major			= 1,
+	.minor			= 0,
+};
+
+static const struct of_device_id st7586_of_match[] = {
+	{ .compatible = "lego,ev3-lcd" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, st7586_of_match);
+
+static const struct spi_device_id st7586_id[] = {
+	{ "ev3-lcd", 0 },
+	{ },
+};
+MODULE_DEVICE_TABLE(spi, st7586_id);
+
+static int st7586_probe(struct spi_device *spi)
+{
+	struct device *dev = &spi->dev;
+	struct mipi_dbi_dev *dbidev;
+	struct drm_device *drm;
+	struct mipi_dbi *dbi;
+	struct gpio_desc *a0;
+	u32 rotation = 0;
+	size_t bufsize;
+	int ret;
+
+	dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
+	if (!dbidev)
+		return -ENOMEM;
+
+	dbi = &dbidev->dbi;
+	drm = &dbidev->drm;
+	ret = devm_drm_dev_init(dev, drm, &st7586_driver);
+	if (ret) {
+		kfree(dbidev);
+		return ret;
+	}
+
+	drm_mode_config_init(drm);
+
+	bufsize = (st7586_mode.vdisplay + 2) / 3 * st7586_mode.hdisplay;
+
+	dbi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(dbi->reset)) {
+		DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
+		return PTR_ERR(dbi->reset);
+	}
+
+	a0 = devm_gpiod_get(dev, "a0", GPIOD_OUT_LOW);
+	if (IS_ERR(a0)) {
+		DRM_DEV_ERROR(dev, "Failed to get gpio 'a0'\n");
+		return PTR_ERR(a0);
+	}
+
+	device_property_read_u32(dev, "rotation", &rotation);
+
+	ret = mipi_dbi_spi_init(spi, dbi, a0);
+	if (ret)
+		return ret;
+
+	/* Cannot read from this controller via SPI */
+	dbi->read_commands = NULL;
+
+	ret = mipi_dbi_dev_init_with_formats(dbidev, &st7586_pipe_funcs,
+					     st7586_formats, ARRAY_SIZE(st7586_formats),
+					     &st7586_mode, rotation, bufsize);
+	if (ret)
+		return ret;
+
+	/*
+	 * we are using 8-bit data, so we are not actually swapping anything,
+	 * but setting mipi->swap_bytes makes mipi_dbi_typec3_command() do the
+	 * right thing and not use 16-bit transfers (which results in swapped
+	 * bytes on little-endian systems and causes out of order data to be
+	 * sent to the display).
+	 */
+	dbi->swap_bytes = true;
+
+	drm_mode_config_reset(drm);
+
+	ret = drm_dev_register(drm, 0);
+	if (ret)
+		return ret;
+
+	spi_set_drvdata(spi, drm);
+
+	drm_fbdev_generic_setup(drm, 0);
+
+	return 0;
+}
+
+static int st7586_remove(struct spi_device *spi)
+{
+	struct drm_device *drm = spi_get_drvdata(spi);
+
+	drm_dev_unplug(drm);
+	drm_atomic_helper_shutdown(drm);
+
+	return 0;
+}
+
+static void st7586_shutdown(struct spi_device *spi)
+{
+	drm_atomic_helper_shutdown(spi_get_drvdata(spi));
+}
+
+static struct spi_driver st7586_spi_driver = {
+	.driver = {
+		.name = "st7586",
+		.owner = THIS_MODULE,
+		.of_match_table = st7586_of_match,
+	},
+	.id_table = st7586_id,
+	.probe = st7586_probe,
+	.remove = st7586_remove,
+	.shutdown = st7586_shutdown,
+};
+module_spi_driver(st7586_spi_driver);
+
+MODULE_DESCRIPTION("Sitronix ST7586 DRM driver");
+MODULE_AUTHOR("David Lechner <david@lechnology.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/tiny/st7735r.c b/drivers/gpu/drm/tiny/st7735r.c
new file mode 100644
index 000000000000..3f4487c71684
--- /dev/null
+++ b/drivers/gpu/drm/tiny/st7735r.c
@@ -0,0 +1,246 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * DRM driver for Sitronix ST7735R panels
+ *
+ * Copyright 2017 David Lechner <david@lechnology.com>
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/dma-buf.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/spi/spi.h>
+#include <video/mipi_display.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_mipi_dbi.h>
+
+#define ST7735R_FRMCTR1		0xb1
+#define ST7735R_FRMCTR2		0xb2
+#define ST7735R_FRMCTR3		0xb3
+#define ST7735R_INVCTR		0xb4
+#define ST7735R_PWCTR1		0xc0
+#define ST7735R_PWCTR2		0xc1
+#define ST7735R_PWCTR3		0xc2
+#define ST7735R_PWCTR4		0xc3
+#define ST7735R_PWCTR5		0xc4
+#define ST7735R_VMCTR1		0xc5
+#define ST7735R_GAMCTRP1	0xe0
+#define ST7735R_GAMCTRN1	0xe1
+
+#define ST7735R_MY	BIT(7)
+#define ST7735R_MX	BIT(6)
+#define ST7735R_MV	BIT(5)
+
+static void jd_t18003_t01_pipe_enable(struct drm_simple_display_pipe *pipe,
+				      struct drm_crtc_state *crtc_state,
+				      struct drm_plane_state *plane_state)
+{
+	struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
+	struct mipi_dbi *dbi = &dbidev->dbi;
+	int ret, idx;
+	u8 addr_mode;
+
+	if (!drm_dev_enter(pipe->crtc.dev, &idx))
+		return;
+
+	DRM_DEBUG_KMS("\n");
+
+	ret = mipi_dbi_poweron_reset(dbidev);
+	if (ret)
+		goto out_exit;
+
+	msleep(150);
+
+	mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
+	msleep(500);
+
+	mipi_dbi_command(dbi, ST7735R_FRMCTR1, 0x01, 0x2c, 0x2d);
+	mipi_dbi_command(dbi, ST7735R_FRMCTR2, 0x01, 0x2c, 0x2d);
+	mipi_dbi_command(dbi, ST7735R_FRMCTR3, 0x01, 0x2c, 0x2d, 0x01, 0x2c,
+			 0x2d);
+	mipi_dbi_command(dbi, ST7735R_INVCTR, 0x07);
+	mipi_dbi_command(dbi, ST7735R_PWCTR1, 0xa2, 0x02, 0x84);
+	mipi_dbi_command(dbi, ST7735R_PWCTR2, 0xc5);
+	mipi_dbi_command(dbi, ST7735R_PWCTR3, 0x0a, 0x00);
+	mipi_dbi_command(dbi, ST7735R_PWCTR4, 0x8a, 0x2a);
+	mipi_dbi_command(dbi, ST7735R_PWCTR5, 0x8a, 0xee);
+	mipi_dbi_command(dbi, ST7735R_VMCTR1, 0x0e);
+	mipi_dbi_command(dbi, MIPI_DCS_EXIT_INVERT_MODE);
+	switch (dbidev->rotation) {
+	default:
+		addr_mode = ST7735R_MX | ST7735R_MY;
+		break;
+	case 90:
+		addr_mode = ST7735R_MX | ST7735R_MV;
+		break;
+	case 180:
+		addr_mode = 0;
+		break;
+	case 270:
+		addr_mode = ST7735R_MY | ST7735R_MV;
+		break;
+	}
+	mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
+	mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT,
+			 MIPI_DCS_PIXEL_FMT_16BIT);
+	mipi_dbi_command(dbi, ST7735R_GAMCTRP1, 0x02, 0x1c, 0x07, 0x12, 0x37,
+			 0x32, 0x29, 0x2d, 0x29, 0x25, 0x2b, 0x39, 0x00, 0x01,
+			 0x03, 0x10);
+	mipi_dbi_command(dbi, ST7735R_GAMCTRN1, 0x03, 0x1d, 0x07, 0x06, 0x2e,
+			 0x2c, 0x29, 0x2d, 0x2e, 0x2e, 0x37, 0x3f, 0x00, 0x00,
+			 0x02, 0x10);
+	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
+
+	msleep(100);
+
+	mipi_dbi_command(dbi, MIPI_DCS_ENTER_NORMAL_MODE);
+
+	msleep(20);
+
+	mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
+out_exit:
+	drm_dev_exit(idx);
+}
+
+static const struct drm_simple_display_pipe_funcs jd_t18003_t01_pipe_funcs = {
+	.enable		= jd_t18003_t01_pipe_enable,
+	.disable	= mipi_dbi_pipe_disable,
+	.update		= mipi_dbi_pipe_update,
+	.prepare_fb	= drm_gem_fb_simple_display_pipe_prepare_fb,
+};
+
+static const struct drm_display_mode jd_t18003_t01_mode = {
+	DRM_SIMPLE_MODE(128, 160, 28, 35),
+};
+
+DEFINE_DRM_GEM_CMA_FOPS(st7735r_fops);
+
+static struct drm_driver st7735r_driver = {
+	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+	.fops			= &st7735r_fops,
+	.release		= mipi_dbi_release,
+	DRM_GEM_CMA_VMAP_DRIVER_OPS,
+	.debugfs_init		= mipi_dbi_debugfs_init,
+	.name			= "st7735r",
+	.desc			= "Sitronix ST7735R",
+	.date			= "20171128",
+	.major			= 1,
+	.minor			= 0,
+};
+
+static const struct of_device_id st7735r_of_match[] = {
+	{ .compatible = "jianda,jd-t18003-t01" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, st7735r_of_match);
+
+static const struct spi_device_id st7735r_id[] = {
+	{ "jd-t18003-t01", 0 },
+	{ },
+};
+MODULE_DEVICE_TABLE(spi, st7735r_id);
+
+static int st7735r_probe(struct spi_device *spi)
+{
+	struct device *dev = &spi->dev;
+	struct mipi_dbi_dev *dbidev;
+	struct drm_device *drm;
+	struct mipi_dbi *dbi;
+	struct gpio_desc *dc;
+	u32 rotation = 0;
+	int ret;
+
+	dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
+	if (!dbidev)
+		return -ENOMEM;
+
+	dbi = &dbidev->dbi;
+	drm = &dbidev->drm;
+	ret = devm_drm_dev_init(dev, drm, &st7735r_driver);
+	if (ret) {
+		kfree(dbidev);
+		return ret;
+	}
+
+	drm_mode_config_init(drm);
+
+	dbi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(dbi->reset)) {
+		DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
+		return PTR_ERR(dbi->reset);
+	}
+
+	dc = devm_gpiod_get(dev, "dc", GPIOD_OUT_LOW);
+	if (IS_ERR(dc)) {
+		DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
+		return PTR_ERR(dc);
+	}
+
+	dbidev->backlight = devm_of_find_backlight(dev);
+	if (IS_ERR(dbidev->backlight))
+		return PTR_ERR(dbidev->backlight);
+
+	device_property_read_u32(dev, "rotation", &rotation);
+
+	ret = mipi_dbi_spi_init(spi, dbi, dc);
+	if (ret)
+		return ret;
+
+	/* Cannot read from Adafruit 1.8" display via SPI */
+	dbi->read_commands = NULL;
+
+	ret = mipi_dbi_dev_init(dbidev, &jd_t18003_t01_pipe_funcs, &jd_t18003_t01_mode, rotation);
+	if (ret)
+		return ret;
+
+	drm_mode_config_reset(drm);
+
+	ret = drm_dev_register(drm, 0);
+	if (ret)
+		return ret;
+
+	spi_set_drvdata(spi, drm);
+
+	drm_fbdev_generic_setup(drm, 0);
+
+	return 0;
+}
+
+static int st7735r_remove(struct spi_device *spi)
+{
+	struct drm_device *drm = spi_get_drvdata(spi);
+
+	drm_dev_unplug(drm);
+	drm_atomic_helper_shutdown(drm);
+
+	return 0;
+}
+
+static void st7735r_shutdown(struct spi_device *spi)
+{
+	drm_atomic_helper_shutdown(spi_get_drvdata(spi));
+}
+
+static struct spi_driver st7735r_spi_driver = {
+	.driver = {
+		.name = "st7735r",
+		.owner = THIS_MODULE,
+		.of_match_table = st7735r_of_match,
+	},
+	.id_table = st7735r_id,
+	.probe = st7735r_probe,
+	.remove = st7735r_remove,
+	.shutdown = st7735r_shutdown,
+};
+module_spi_driver(st7735r_spi_driver);
+
+MODULE_DESCRIPTION("Sitronix ST7735R DRM driver");
+MODULE_AUTHOR("David Lechner <david@lechnology.com>");
+MODULE_LICENSE("GPL");