diff options
Diffstat (limited to 'drivers/gpu/drm/vc4/vc4_v3d.c')
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_v3d.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_v3d.c b/drivers/gpu/drm/vc4/vc4_v3d.c index 040ad0d8b8a1..424d515ffcda 100644 --- a/drivers/gpu/drm/vc4/vc4_v3d.c +++ b/drivers/gpu/drm/vc4/vc4_v3d.c @@ -144,6 +144,21 @@ int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused) } #endif /* CONFIG_DEBUG_FS */ +/* + * Asks the firmware to turn on power to the V3D engine. + * + * This may be doable with just the clocks interface, though this + * packet does some other register setup from the firmware, too. + */ +int +vc4_v3d_set_power(struct vc4_dev *vc4, bool on) +{ + if (on) + return pm_generic_poweroff(&vc4->v3d->pdev->dev); + else + return pm_generic_resume(&vc4->v3d->pdev->dev); +} + static void vc4_v3d_init_hw(struct drm_device *dev) { struct vc4_dev *vc4 = to_vc4_dev(dev); @@ -161,6 +176,7 @@ static int vc4_v3d_bind(struct device *dev, struct device *master, void *data) struct drm_device *drm = dev_get_drvdata(master); struct vc4_dev *vc4 = to_vc4_dev(drm); struct vc4_v3d *v3d = NULL; + int ret; v3d = devm_kzalloc(&pdev->dev, sizeof(*v3d), GFP_KERNEL); if (!v3d) @@ -180,8 +196,20 @@ static int vc4_v3d_bind(struct device *dev, struct device *master, void *data) return -EINVAL; } + /* Reset the binner overflow address/size at setup, to be sure + * we don't reuse an old one. + */ + V3D_WRITE(V3D_BPOA, 0); + V3D_WRITE(V3D_BPOS, 0); + vc4_v3d_init_hw(drm); + ret = drm_irq_install(drm, platform_get_irq(pdev, 0)); + if (ret) { + DRM_ERROR("Failed to install IRQ handler\n"); + return ret; + } + return 0; } @@ -191,6 +219,15 @@ static void vc4_v3d_unbind(struct device *dev, struct device *master, struct drm_device *drm = dev_get_drvdata(master); struct vc4_dev *vc4 = to_vc4_dev(drm); + drm_irq_uninstall(drm); + + /* Disable the binner's overflow memory address, so the next + * driver probe (if any) doesn't try to reuse our old + * allocation. + */ + V3D_WRITE(V3D_BPOA, 0); + V3D_WRITE(V3D_BPOS, 0); + vc4->v3d = NULL; } |