Based on grepping through the source code this driver appears to be
missing a call to drm_atomic_helper_shutdown() at system shutdown
time. Among other things, this means that if a panel is in use that it
won't be cleanly powered off at system shutdown time.
The fact that we should call drm_atomic_helper_shutdown() in the case
of OS shutdown/restart comes straight out of the kernel doc "driver
instance overview" in drm_drv.c.
Suggested-by: Maxime Ripard <mripard@xxxxxxxxxx>
Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
---
This commit is only compile-time tested.
...and further, I'd say that this patch is more of a plea for help
than a patch I think is actually right. I'm _fairly_ certain that
drm/amdgpu needs this call at shutdown time but the logic is a bit
hard for me to follow. I'd appreciate if anyone who actually knows
what this should look like could illuminate me, or perhaps even just
post a patch themselves!
(no changes since v1)
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 +
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 10 ++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 2 ++
3 files changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 8f2255b3a38a..cfcff0b37466 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1104,6 +1104,7 @@ static inline struct amdgpu_device *amdgpu_ttm_adev(struct ttm_device *bdev)
int amdgpu_device_init(struct amdgpu_device *adev,
uint32_t flags);
void amdgpu_device_fini_hw(struct amdgpu_device *adev);
+void amdgpu_device_shutdown_hw(struct amdgpu_device *adev);
void amdgpu_device_fini_sw(struct amdgpu_device *adev);
int amdgpu_gpu_wait_for_idle(struct amdgpu_device *adev);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index a2cdde0ca0a7..fa5925c2092d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -4247,6 +4247,16 @@ void amdgpu_device_fini_hw(struct amdgpu_device *adev)
}
+void amdgpu_device_shutdown_hw(struct amdgpu_device *adev)
+{
+ if (adev->mode_info.mode_config_initialized) {
+ if (!drm_drv_uses_atomic_modeset(adev_to_drm(adev)))
+ drm_helper_force_disable_all(adev_to_drm(adev));
+ else
+ drm_atomic_helper_shutdown(adev_to_drm(adev));
+ }
+}
+
void amdgpu_device_fini_sw(struct amdgpu_device *adev)
{
int idx;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index e90f730eb715..3a7cbff111d1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -2333,6 +2333,8 @@ amdgpu_pci_shutdown(struct pci_dev *pdev)
struct drm_device *dev = pci_get_drvdata(pdev);
struct amdgpu_device *adev = drm_to_adev(dev);
+ amdgpu_device_shutdown_hw(adev);
+
if (amdgpu_ras_intr_triggered())
return;
--
2.42.0.515.g380fc7ccd1-goog
