diff options
| author | Lyude Paul <lyude@redhat.com> | 2022-08-17 15:38:45 -0400 |
|---|---|---|
| committer | Lyude Paul <lyude@redhat.com> | 2022-08-23 16:53:43 -0400 |
| commit | 01ad1d9c2888d51f2fb5b5ac88af8bd47d76937e (patch) | |
| tree | 49dc2499265bea4daa548b170a8226aaf646e923 /drivers/gpu/drm/radeon/radeon_dp_mst.c | |
| parent | 6366fc70deb9aaf1db4a46916af14fa3c5a115ab (diff) | |
| download | linux-01ad1d9c2888d51f2fb5b5ac88af8bd47d76937e.tar.gz linux-01ad1d9c2888d51f2fb5b5ac88af8bd47d76937e.tar.bz2 linux-01ad1d9c2888d51f2fb5b5ac88af8bd47d76937e.zip | |
drm/radeon: Drop legacy MST support
Right now, radeon is technically the only non-atomic driver still making
use of the MST helpers - and thus the final user of all of the legacy MST
helpers. Originally I was going to look into seeing if we could move legacy
MST into the radeon driver itself, however:
* SI and CIK both can use amdgpu, which still supports MST
* It currently doesn't work according to my own testing. I'm sure with some
troubleshooting we could likely fix it, but that brings me to point #2:
* It was never actually enabled by default, and is still marked as
experimental in the module parameter description
* If people were using it, someone probably would have probably seen a bug
report about how it is currently not functional by now. That certainly
doesn't appear to be the case, since before getting access to my own
hardware I had to go out of my way to try finding someone to help test
whether this legacy MST code even works - even amongst AMD employees.
* Getting rid of this code and only having atomic versions of the MST
helpers to maintain is likely going to be a lot easier in the long run,
and will make it a lot easier for others contributing to this code to
follow along with what's happening.
FWIW - if anyone still wants this code to be in the tree and has a good
idea of how to support this without needing to maintain the legacy MST
helpers (trying to move them would probably be acceptable), I'm happy to
suggestions. But my hope is that we can just drop this code and forget
about it. I've already run this idea by Harry Wentland and Alex Deucher a
few times as well.
Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: Wayne Lin <Wayne.Lin@amd.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Fangzhi Zuo <Jerry.Zuo@amd.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Sean Paul <sean@poorly.run>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220817193847.557945-17-lyude@redhat.com
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_dp_mst.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_dp_mst.c | 778 |
1 files changed, 0 insertions, 778 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_dp_mst.c b/drivers/gpu/drm/radeon/radeon_dp_mst.c deleted file mode 100644 index 54ced1f4ff67..000000000000 --- a/drivers/gpu/drm/radeon/radeon_dp_mst.c +++ /dev/null @@ -1,778 +0,0 @@ -// SPDX-License-Identifier: MIT - -#include <drm/display/drm_dp_mst_helper.h> -#include <drm/drm_fb_helper.h> -#include <drm/drm_file.h> -#include <drm/drm_probe_helper.h> - -#include "atom.h" -#include "ni_reg.h" -#include "radeon.h" - -static struct radeon_encoder *radeon_dp_create_fake_mst_encoder(struct radeon_connector *connector); - -static int radeon_atom_set_enc_offset(int id) -{ - static const int offsets[] = { EVERGREEN_CRTC0_REGISTER_OFFSET, - EVERGREEN_CRTC1_REGISTER_OFFSET, - EVERGREEN_CRTC2_REGISTER_OFFSET, - EVERGREEN_CRTC3_REGISTER_OFFSET, - EVERGREEN_CRTC4_REGISTER_OFFSET, - EVERGREEN_CRTC5_REGISTER_OFFSET, - 0x13830 - 0x7030 }; - - return offsets[id]; -} - -static int radeon_dp_mst_set_be_cntl(struct radeon_encoder *primary, - struct radeon_encoder_mst *mst_enc, - enum radeon_hpd_id hpd, bool enable) -{ - struct drm_device *dev = primary->base.dev; - struct radeon_device *rdev = dev->dev_private; - uint32_t reg; - int retries = 0; - uint32_t temp; - - reg = RREG32(NI_DIG_BE_CNTL + primary->offset); - - /* set MST mode */ - reg &= ~NI_DIG_FE_DIG_MODE(7); - reg |= NI_DIG_FE_DIG_MODE(NI_DIG_MODE_DP_MST); - - if (enable) - reg |= NI_DIG_FE_SOURCE_SELECT(1 << mst_enc->fe); - else - reg &= ~NI_DIG_FE_SOURCE_SELECT(1 << mst_enc->fe); - - reg |= NI_DIG_HPD_SELECT(hpd); - DRM_DEBUG_KMS("writing 0x%08x 0x%08x\n", NI_DIG_BE_CNTL + primary->offset, reg); - WREG32(NI_DIG_BE_CNTL + primary->offset, reg); - - if (enable) { - uint32_t offset = radeon_atom_set_enc_offset(mst_enc->fe); - - do { - temp = RREG32(NI_DIG_FE_CNTL + offset); - } while ((temp & NI_DIG_SYMCLK_FE_ON) && retries++ < 10000); - if (retries == 10000) - DRM_ERROR("timed out waiting for FE %d %d\n", primary->offset, mst_enc->fe); - } - return 0; -} - -static int radeon_dp_mst_set_stream_attrib(struct radeon_encoder *primary, - int stream_number, - int fe, - int slots) -{ - struct drm_device *dev = primary->base.dev; - struct radeon_device *rdev = dev->dev_private; - u32 temp, val; - int retries = 0; - int satreg, satidx; - - satreg = stream_number >> 1; - satidx = stream_number & 1; - - temp = RREG32(NI_DP_MSE_SAT0 + satreg + primary->offset); - - val = NI_DP_MSE_SAT_SLOT_COUNT0(slots) | NI_DP_MSE_SAT_SRC0(fe); - - val <<= (16 * satidx); - - temp &= ~(0xffff << (16 * satidx)); - - temp |= val; - - DRM_DEBUG_KMS("writing 0x%08x 0x%08x\n", NI_DP_MSE_SAT0 + satreg + primary->offset, temp); - WREG32(NI_DP_MSE_SAT0 + satreg + primary->offset, temp); - - WREG32(NI_DP_MSE_SAT_UPDATE + primary->offset, 1); - - do { - unsigned value1, value2; - udelay(10); - temp = RREG32(NI_DP_MSE_SAT_UPDATE + primary->offset); - - value1 = temp & NI_DP_MSE_SAT_UPDATE_MASK; - value2 = temp & NI_DP_MSE_16_MTP_KEEPOUT; - - if (!value1 && !value2) - break; - } while (retries++ < 50); - - if (retries == 10000) - DRM_ERROR("timed out waitin for SAT update %d\n", primary->offset); - - /* MTP 16 ? */ - return 0; -} - -static int radeon_dp_mst_update_stream_attribs(struct radeon_connector *mst_conn, - struct radeon_encoder *primary) -{ - struct drm_device *dev = mst_conn->base.dev; - struct stream_attribs new_attribs[6]; - int i; - int idx = 0; - struct radeon_connector *radeon_connector; - struct drm_connector *connector; - - memset(new_attribs, 0, sizeof(new_attribs)); - list_for_each_entry(connector, &dev->mode_config.connector_list, head) { - struct radeon_encoder *subenc; - struct radeon_encoder_mst *mst_enc; - - radeon_connector = to_radeon_connector(connector); - if (!radeon_connector->is_mst_connector) - continue; - - if (radeon_connector->mst_port != mst_conn) - continue; - - subenc = radeon_connector->mst_encoder; - mst_enc = subenc->enc_priv; - - if (!mst_enc->enc_active) - continue; - - new_attribs[idx].fe = mst_enc->fe; - new_attribs[idx].slots = drm_dp_mst_get_vcpi_slots(&mst_conn->mst_mgr, mst_enc->port); - idx++; - } - - for (i = 0; i < idx; i++) { - if (new_attribs[i].fe != mst_conn->cur_stream_attribs[i].fe || - new_attribs[i].slots != mst_conn->cur_stream_attribs[i].slots) { - radeon_dp_mst_set_stream_attrib(primary, i, new_attribs[i].fe, new_attribs[i].slots); - mst_conn->cur_stream_attribs[i].fe = new_attribs[i].fe; - mst_conn->cur_stream_attribs[i].slots = new_attribs[i].slots; - } - } - - for (i = idx; i < mst_conn->enabled_attribs; i++) { - radeon_dp_mst_set_stream_attrib(primary, i, 0, 0); - mst_conn->cur_stream_attribs[i].fe = 0; - mst_conn->cur_stream_attribs[i].slots = 0; - } - mst_conn->enabled_attribs = idx; - return 0; -} - -static int radeon_dp_mst_set_vcp_size(struct radeon_encoder *mst, s64 avg_time_slots_per_mtp) -{ - struct drm_device *dev = mst->base.dev; - struct radeon_device *rdev = dev->dev_private; - struct radeon_encoder_mst *mst_enc = mst->enc_priv; - uint32_t val, temp; - uint32_t offset = radeon_atom_set_enc_offset(mst_enc->fe); - int retries = 0; - uint32_t x = drm_fixp2int(avg_time_slots_per_mtp); - uint32_t y = drm_fixp2int_ceil((avg_time_slots_per_mtp - x) << 26); - - val = NI_DP_MSE_RATE_X(x) | NI_DP_MSE_RATE_Y(y); - - WREG32(NI_DP_MSE_RATE_CNTL + offset, val); - - do { - temp = RREG32(NI_DP_MSE_RATE_UPDATE + offset); - udelay(10); - } while ((temp & 0x1) && (retries++ < 10000)); - - if (retries >= 10000) - DRM_ERROR("timed out wait for rate cntl %d\n", mst_enc->fe); - return 0; -} - -static int radeon_dp_mst_get_ddc_modes(struct drm_connector *connector) -{ - struct radeon_connector *radeon_connector = to_radeon_connector(connector); - struct radeon_connector *master = radeon_connector->mst_port; - struct edid *edid; - int ret = 0; - - edid = drm_dp_mst_get_edid(connector, &master->mst_mgr, radeon_connector->port); - radeon_connector->edid = edid; - DRM_DEBUG_KMS("edid retrieved %p\n", edid); - if (radeon_connector->edid) { - drm_connector_update_edid_property(&radeon_connector->base, radeon_connector->edid); - ret = drm_add_edid_modes(&radeon_connector->base, radeon_connector->edid); - return ret; - } - drm_connector_update_edid_property(&radeon_connector->base, NULL); - - return ret; -} - -static int radeon_dp_mst_get_modes(struct drm_connector *connector) -{ - return radeon_dp_mst_get_ddc_modes(connector); -} - -static enum drm_mode_status -radeon_dp_mst_mode_valid(struct drm_connector *connector, - struct drm_display_mode *mode) -{ - /* TODO - validate mode against available PBN for link */ - if (mode->clock < 10000) - return MODE_CLOCK_LOW; - - if (mode->flags & DRM_MODE_FLAG_DBLCLK) - return MODE_H_ILLEGAL; - - return MODE_OK; -} - -static struct -drm_encoder *radeon_mst_best_encoder(struct drm_connector *connector) -{ - struct radeon_connector *radeon_connector = to_radeon_connector(connector); - - return &radeon_connector->mst_encoder->base; -} - -static int -radeon_dp_mst_detect(struct drm_connector *connector, - struct drm_modeset_acquire_ctx *ctx, - bool force) -{ - struct radeon_connector *radeon_connector = - to_radeon_connector(connector); - struct radeon_connector *master = radeon_connector->mst_port; - - if (drm_connector_is_unregistered(connector)) - return connector_status_disconnected; - - return drm_dp_mst_detect_port(connector, ctx, &master->mst_mgr, - radeon_connector->port); -} - -static const struct drm_connector_helper_funcs radeon_dp_mst_connector_helper_funcs = { - .get_modes = radeon_dp_mst_get_modes, - .mode_valid = radeon_dp_mst_mode_valid, - .best_encoder = radeon_mst_best_encoder, - .detect_ctx = radeon_dp_mst_detect, -}; - -static void -radeon_dp_mst_connector_destroy(struct drm_connector *connector) -{ - struct radeon_connector *radeon_connector = to_radeon_connector(connector); - struct radeon_encoder *radeon_encoder = radeon_connector->mst_encoder; - - drm_encoder_cleanup(&radeon_encoder->base); - kfree(radeon_encoder); - drm_connector_cleanup(connector); - kfree(radeon_connector); -} - -static const struct drm_connector_funcs radeon_dp_mst_connector_funcs = { - .dpms = drm_helper_connector_dpms, - .fill_modes = drm_helper_probe_single_connector_modes, - .destroy = radeon_dp_mst_connector_destroy, -}; - -static struct drm_connector *radeon_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr, - struct drm_dp_mst_port *port, - const char *pathprop) -{ - struct radeon_connector *master = container_of(mgr, struct radeon_connector, mst_mgr); - struct drm_device *dev = master->base.dev; - struct radeon_connector *radeon_connector; - struct drm_connector *connector; - - radeon_connector = kzalloc(sizeof(*radeon_connector), GFP_KERNEL); - if (!radeon_connector) - return NULL; - - radeon_connector->is_mst_connector = true; - connector = &radeon_connector->base; - radeon_connector->port = port; - radeon_connector->mst_port = master; - DRM_DEBUG_KMS("\n"); - - drm_connector_init(dev, connector, &radeon_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort); - drm_connector_helper_add(connector, &radeon_dp_mst_connector_helper_funcs); - radeon_connector->mst_encoder = radeon_dp_create_fake_mst_encoder(master); - - drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0); - drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0); - drm_connector_set_path_property(connector, pathprop); - - return connector; -} - -static const struct drm_dp_mst_topology_cbs mst_cbs = { - .add_connector = radeon_dp_add_mst_connector, -}; - -static struct -radeon_connector *radeon_mst_find_connector(struct drm_encoder *encoder) -{ - struct drm_device *dev = encoder->dev; - struct drm_connector *connector; - - list_for_each_entry(connector, &dev->mode_config.connector_list, head) { - struct radeon_connector *radeon_connector = to_radeon_connector(connector); - if (!connector->encoder) - continue; - if (!radeon_connector->is_mst_connector) - continue; - - DRM_DEBUG_KMS("checking %p vs %p\n", connector->encoder, encoder); - if (connector->encoder == encoder) - return radeon_connector; - } - return NULL; -} - -void radeon_dp_mst_prepare_pll(struct drm_crtc *crtc, struct drm_display_mode *mode) -{ - struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc); - struct drm_device *dev = crtc->dev; - struct radeon_device *rdev = dev->dev_private; - struct radeon_encoder *radeon_encoder = to_radeon_encoder(radeon_crtc->encoder); - struct radeon_encoder_mst *mst_enc = radeon_encoder->enc_priv; - struct radeon_connector *radeon_connector = radeon_mst_find_connector(&radeon_encoder->base); - int dp_clock; - struct radeon_connector_atom_dig *dig_connector = mst_enc->connector->con_priv; - - if (radeon_connector) { - radeon_connector->pixelclock_for_modeset = mode->clock; - if (radeon_connector->base.display_info.bpc) - radeon_crtc->bpc = radeon_connector->base.display_info.bpc; - else - radeon_crtc->bpc = 8; - } - - DRM_DEBUG_KMS("dp_clock %p %d\n", dig_connector, dig_connector->dp_clock); - dp_clock = dig_connector->dp_clock; - radeon_crtc->ss_enabled = - radeon_atombios_get_asic_ss_info(rdev, &radeon_crtc->ss, - ASIC_INTERNAL_SS_ON_DP, - dp_clock); -} - -static void -radeon_mst_encoder_dpms(struct drm_encoder *encoder, int mode) -{ - struct drm_device *dev = encoder->dev; - struct radeon_device *rdev = dev->dev_private; - struct radeon_encoder *radeon_encoder, *primary; - struct radeon_encoder_mst *mst_enc; - struct radeon_encoder_atom_dig *dig_enc; - struct radeon_connector *radeon_connector; - struct drm_crtc *crtc; - struct radeon_crtc *radeon_crtc; - int slots; - s64 fixed_pbn, fixed_pbn_per_slot, avg_time_slots_per_mtp; - if (!ASIC_IS_DCE5(rdev)) { - DRM_ERROR("got mst dpms on non-DCE5\n"); - return; - } - - radeon_connector = radeon_mst_find_connector(encoder); - if (!radeon_connector) - return; - - radeon_encoder = to_radeon_encoder(encoder); - - mst_enc = radeon_encoder->enc_priv; - - primary = mst_enc->primary; - - dig_enc = primary->enc_priv; - - crtc = encoder->crtc; - DRM_DEBUG_KMS("got connector %d\n", dig_enc->active_mst_links); - - switch (mode) { - case DRM_MODE_DPMS_ON: - dig_enc->active_mst_links++; - - radeon_crtc = to_radeon_crtc(crtc); - - if (dig_enc->active_mst_links == 1) { - mst_enc->fe = dig_enc->dig_encoder; - mst_enc->fe_from_be = true; - atombios_set_mst_encoder_crtc_source(encoder, mst_enc->fe); - - atombios_dig_encoder_setup(&primary->base, ATOM_ENCODER_CMD_SETUP, 0); - atombios_dig_transmitter_setup2(&primary->base, ATOM_TRANSMITTER_ACTION_ENABLE, - 0, 0, dig_enc->dig_encoder); - - if (radeon_dp_needs_link_train(mst_enc->connector) || - dig_enc->active_mst_links == 1) { - radeon_dp_link_train(&primary->base, &mst_enc->connector->base); - } - - } else { - mst_enc->fe = radeon_atom_pick_dig_encoder(encoder, radeon_crtc->crtc_id); - if (mst_enc->fe == -1) - DRM_ERROR("failed to get frontend for dig encoder\n"); - mst_enc->fe_from_be = false; - atombios_set_mst_encoder_crtc_source(encoder, mst_enc->fe); - } - - DRM_DEBUG_KMS("dig encoder is %d %d %d\n", dig_enc->dig_encoder, - dig_enc->linkb, radeon_crtc->crtc_id); - - slots = drm_dp_find_vcpi_slots(&radeon_connector->mst_port->mst_mgr, - mst_enc->pbn); - drm_dp_mst_allocate_vcpi(&radeon_connector->mst_port->mst_mgr, - radeon_connector->port, - mst_enc->pbn, slots); - drm_dp_update_payload_part1(&radeon_connector->mst_port->mst_mgr, 1); - - radeon_dp_mst_set_be_cntl(primary, mst_enc, - radeon_connector->mst_port->hpd.hpd, true); - - mst_enc->enc_active = true; - radeon_dp_mst_update_stream_attribs(radeon_connector->mst_port, primary); - - fixed_pbn = drm_int2fixp(mst_enc->pbn); - fixed_pbn_per_slot = drm_int2fixp(radeon_connector->mst_port->mst_mgr.pbn_div); - avg_time_slots_per_mtp = drm_fixp_div(fixed_pbn, fixed_pbn_per_slot); - radeon_dp_mst_set_vcp_size(radeon_encoder, avg_time_slots_per_mtp); - - atombios_dig_encoder_setup2(&primary->base, ATOM_ENCODER_CMD_DP_VIDEO_ON, 0, - mst_enc->fe); - drm_dp_check_act_status(&radeon_connector->mst_port->mst_mgr); - - drm_dp_update_payload_part2(&radeon_connector->mst_port->mst_mgr); - - break; - case DRM_MODE_DPMS_STANDBY: - case DRM_MODE_DPMS_SUSPEND: - case DRM_MODE_DPMS_OFF: - DRM_ERROR("DPMS OFF %d\n", dig_enc->active_mst_links); - - if (!mst_enc->enc_active) - return; - - drm_dp_mst_reset_vcpi_slots(&radeon_connector->mst_port->mst_mgr, mst_enc->port); - drm_dp_update_payload_part1(&radeon_connector->mst_port->mst_mgr, 1); - - drm_dp_check_act_status(&radeon_connector->mst_port->mst_mgr); - /* and this can also fail */ - drm_dp_update_payload_part2(&radeon_connector->mst_port->mst_mgr); - - drm_dp_mst_deallocate_vcpi(&radeon_connector->mst_port->mst_mgr, mst_enc->port); - - mst_enc->enc_active = false; - radeon_dp_mst_update_stream_attribs(radeon_connector->mst_port, primary); - - radeon_dp_mst_set_be_cntl(primary, mst_enc, - radeon_connector->mst_port->hpd.hpd, false); - atombios_dig_encoder_setup2(&primary->base, ATOM_ENCODER_CMD_DP_VIDEO_OFF, 0, - mst_enc->fe); - - if (!mst_enc->fe_from_be) - radeon_atom_release_dig_encoder(rdev, mst_enc->fe); - - mst_enc->fe_from_be = false; - dig_enc->active_mst_links--; - if (dig_enc->active_mst_links == 0) { - /* drop link */ - } - - break; - } - -} - -static bool radeon_mst_mode_fixup(struct drm_encoder *encoder, - const struct drm_display_mode *mode, - struct drm_display_mode *adjusted_mode) -{ - struct radeon_encoder_mst *mst_enc; - struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder); - struct radeon_connector_atom_dig *dig_connector; - int bpp = 24; - - mst_enc = radeon_encoder->enc_priv; - - mst_enc->pbn = drm_dp_calc_pbn_mode(adjusted_mode->clock, bpp, false); - - mst_enc->primary->active_device = mst_enc->primary->devices & mst_enc->connector->devices; - DRM_DEBUG_KMS("setting active device to %08x from %08x %08x for encoder %d\n", - mst_enc->primary->active_device, mst_enc->primary->devices, - mst_enc->connector->devices, mst_enc->primary->base.encoder_type); - - - drm_mode_set_crtcinfo(adjusted_mode, 0); - dig_connector = mst_enc->connector->con_priv; - dig_connector->dp_lane_count = drm_dp_max_lane_count(dig_connector->dpcd); - dig_connector->dp_clock = drm_dp_max_link_rate(dig_connector->dpcd); - DRM_DEBUG_KMS("dig clock %p %d %d\n", dig_connector, - dig_connector->dp_lane_count, dig_connector->dp_clock); - return true; -} - -static void radeon_mst_encoder_prepare(struct drm_encoder *encoder) -{ - struct radeon_connector *radeon_connector; - struct radeon_encoder *radeon_encoder, *primary; - struct radeon_encoder_mst *mst_enc; - struct radeon_encoder_atom_dig *dig_enc; - - radeon_connector = radeon_mst_find_connector(encoder); - if (!radeon_connector) { - DRM_DEBUG_KMS("failed to find connector %p\n", encoder); - return; - } - radeon_encoder = to_radeon_encoder(encoder); - - radeon_mst_encoder_dpms(encoder, DRM_MODE_DPMS_OFF); - - mst_enc = radeon_encoder->enc_priv; - - primary = mst_enc->primary; - - dig_enc = primary->enc_priv; - - mst_enc->port = radeon_connector->port; - - if (dig_enc->dig_encoder == -1) { - dig_enc->dig_encoder = radeon_atom_pick_dig_encoder(&primary->base, -1); - primary->offset = radeon_atom_set_enc_offset(dig_enc->dig_encoder); - atombios_set_mst_encoder_crtc_source(encoder, dig_enc->dig_encoder); - - - } - DRM_DEBUG_KMS("%d %d\n", dig_enc->dig_encoder, primary->offset); -} - -static void -radeon_mst_encoder_mode_set(struct drm_encoder *encoder, - struct drm_display_mode *mode, - struct drm_display_mode *adjusted_mode) -{ - DRM_DEBUG_KMS("\n"); -} - -static void radeon_mst_encoder_commit(struct drm_encoder *encoder) -{ - radeon_mst_encoder_dpms(encoder, DRM_MODE_DPMS_ON); - DRM_DEBUG_KMS("\n"); -} - -static const struct drm_encoder_helper_funcs radeon_mst_helper_funcs = { - .dpms = radeon_mst_encoder_dpms, - .mode_fixup = radeon_mst_mode_fixup, - .prepare = radeon_mst_encoder_prepare, - .mode_set = radeon_mst_encoder_mode_set, - .commit = radeon_mst_encoder_commit, -}; - -static void radeon_dp_mst_encoder_destroy(struct drm_encoder *encoder) -{ - drm_encoder_cleanup(encoder); - kfree(encoder); -} - -static const struct drm_encoder_funcs radeon_dp_mst_enc_funcs = { - .destroy = radeon_dp_mst_encoder_destroy, -}; - -static struct radeon_encoder * -radeon_dp_create_fake_mst_encoder(struct radeon_connector *connector) -{ - struct drm_device *dev = connector->base.dev; - struct radeon_device *rdev = dev->dev_private; - struct radeon_encoder *radeon_encoder; - struct radeon_encoder_mst *mst_enc; - struct drm_encoder *encoder; - const struct drm_connector_helper_funcs *connector_funcs = connector->base.helper_private; - struct drm_encoder *enc_master = connector_funcs->best_encoder(&connector->base); - - DRM_DEBUG_KMS("enc master is %p\n", enc_master); - radeon_encoder = kzalloc(sizeof(*radeon_encoder), GFP_KERNEL); - if (!radeon_encoder) - return NULL; - - radeon_encoder->enc_priv = kzalloc(sizeof(*mst_enc), GFP_KERNEL); - if (!radeon_encoder->enc_priv) { - kfree(radeon_encoder); - return NULL; - } - encoder = &radeon_encoder->base; - switch (rdev->num_crtc) { - case 1: - encoder->possible_crtcs = 0x1; - break; - case 2: - default: - encoder->possible_crtcs = 0x3; - break; - case 4: - encoder->possible_crtcs = 0xf; - break; - case 6: - encoder->possible_crtcs = 0x3f; - break; - } - - drm_encoder_init(dev, &radeon_encoder->base, &radeon_dp_mst_enc_funcs, - DRM_MODE_ENCODER_DPMST, NULL); - drm_encoder_helper_add(encoder, &radeon_mst_helper_funcs); - - mst_enc = radeon_encoder->enc_priv; - mst_enc->connector = connector; - mst_enc->primary = to_radeon_encoder(enc_master); - radeon_encoder->is_mst_encoder = true; - return radeon_encoder; -} - -int -radeon_dp_mst_init(struct radeon_connector *radeon_connector) -{ - struct drm_device *dev = radeon_connector->base.dev; - int max_link_rate; - - if (!radeon_connector->ddc_bus->has_aux) - return 0; - - if (radeon_connector_is_dp12_capable(&radeon_connector->base)) - max_link_rate = 0x14; - else - max_link_rate = 0x0a; - - radeon_connector->mst_mgr.cbs = &mst_cbs; - return drm_dp_mst_topology_mgr_init(&radeon_connector->mst_mgr, dev, - &radeon_connector->ddc_bus->aux, 16, 6, - 4, drm_dp_bw_code_to_link_rate(max_link_rate), - radeon_connector->base.base.id); -} - -int -radeon_dp_mst_probe(struct radeon_connector *radeon_connector) -{ - struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv; - struct drm_device *dev = radeon_connector->base.dev; - struct radeon_device *rdev = dev->dev_private; - int ret; - u8 msg[1]; - - if (!radeon_mst) - return 0; - - if (!ASIC_IS_DCE5(rdev)) - return 0; - - if (dig_connector->dpcd[DP_DPCD_REV] < 0x12) - return 0; - - ret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux, DP_MSTM_CAP, msg, - 1); - if (ret) { - if (msg[0] & DP_MST_CAP) { - DRM_DEBUG_KMS("Sink is MST capable\n"); - dig_connector->is_mst = true; - } else { - DRM_DEBUG_KMS("Sink is not MST capable\n"); - dig_connector->is_mst = false; - } - - } - drm_dp_mst_topology_mgr_set_mst(&radeon_connector->mst_mgr, - dig_connector->is_mst); - return dig_connector->is_mst; -} - -int -radeon_dp_mst_check_status(struct radeon_connector *radeon_connector) -{ - struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv; - int retry; - - if (dig_connector->is_mst) { - u8 esi[16] = { 0 }; - int dret; - int ret = 0; - bool handled; - - dret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux, - DP_SINK_COUNT_ESI, esi, 8); -go_again: - if (dret == 8) { - DRM_DEBUG_KMS("got esi %3ph\n", esi); - ret = drm_dp_mst_hpd_irq(&radeon_connector->mst_mgr, esi, &handled); - - if (handled) { - for (retry = 0; retry < 3; retry++) { - int wret; - wret = drm_dp_dpcd_write(&radeon_connector->ddc_bus->aux, - DP_SINK_COUNT_ESI + 1, &esi[1], 3); - if (wret == 3) - break; - } - - dret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux, - DP_SINK_COUNT_ESI, esi, 8); - if (dret == 8) { - DRM_DEBUG_KMS("got esi2 %3ph\n", esi); - goto go_again; - } - } else - ret = 0; - - return ret; - } else { - DRM_DEBUG_KMS("failed to get ESI - device may have failed %d\n", ret); - dig_connector->is_mst = false; - drm_dp_mst_topology_mgr_set_mst(&radeon_connector->mst_mgr, - dig_connector->is_mst); - /* send a hotplug event */ - } - } - return -EINVAL; -} - -#if defined(CONFIG_DEBUG_FS) - -static int radeon_debugfs_mst_info_show(struct seq_file *m, void *unused) -{ - struct radeon_device *rdev = (struct radeon_device *)m->private; - struct drm_device *dev = rdev->ddev; - struct drm_connector *connector; - struct radeon_connector *radeon_connector; - struct radeon_connector_atom_dig *dig_connector; - int i; - - drm_modeset_lock_all(dev); - list_for_each_entry(connector, &dev->mode_config.connector_list, head) { - if (connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort) - continue; - - radeon_connector = to_radeon_connector(connector); - dig_connector = radeon_connector->con_priv; - if (radeon_connector->is_mst_connector) - continue; - if (!dig_connector->is_mst) - continue; - drm_dp_mst_dump_topology(m, &radeon_connector->mst_mgr); - - for (i = 0; i < radeon_connector->enabled_attribs; i++) - seq_printf(m, "attrib %d: %d %d\n", i, - radeon_connector->cur_stream_attribs[i].fe, - radeon_connector->cur_stream_attribs[i].slots); - } - drm_modeset_unlock_all(dev); - return 0; -} - -DEFINE_SHOW_ATTRIBUTE(radeon_debugfs_mst_info); -#endif - -void radeon_mst_debugfs_init(struct radeon_device *rdev) -{ -#if defined(CONFIG_DEBUG_FS) - struct dentry *root = rdev->ddev->primary->debugfs_root; - - debugfs_create_file("radeon_mst_info", 0444, root, rdev, - &radeon_debugfs_mst_info_fops); - -#endif -} |