diff options
| author | Rob Clark <robdclark@chromium.org> | 2021-04-30 10:17:39 -0700 |
|---|---|---|
| committer | Maxime Ripard <maxime@cerno.tech> | 2021-05-03 10:18:07 +0200 |
| commit | a712b307cfde6dbe0d4829293afb1566beb30a9a (patch) | |
| tree | 0f1012818b987b40a7cb882e7dcd7000f5d07b88 /drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h | |
| parent | 74deef03a44ae77db85dd80e7ef95777a902e0b3 (diff) | |
| download | linux-a712b307cfde6dbe0d4829293afb1566beb30a9a.tar.bz2 | |
drm/msm/dpu: Delete bonkers code
dpu_crtc_atomic_flush() was directly poking it's attached planes in a
code path that ended up in dpu_plane_atomic_update(), even if the plane
was not involved in the current atomic update. While a bit dubious,
this worked before because plane->state would always point to something
valid. But now using drm_atomic_get_new_plane_state() we could get a
NULL state pointer instead, leading to:
[ 20.873273] Call trace:
[ 20.875740] dpu_plane_atomic_update+0x5c/0xed0
[ 20.880311] dpu_plane_restore+0x40/0x88
[ 20.884266] dpu_crtc_atomic_flush+0xf4/0x208
[ 20.888660] drm_atomic_helper_commit_planes+0x150/0x238
[ 20.894014] msm_atomic_commit_tail+0x1d4/0x7a0
[ 20.898579] commit_tail+0xa4/0x168
[ 20.902102] drm_atomic_helper_commit+0x164/0x178
[ 20.906841] drm_atomic_commit+0x54/0x60
[ 20.910798] drm_atomic_connector_commit_dpms+0x10c/0x118
[ 20.916236] drm_mode_obj_set_property_ioctl+0x1e4/0x440
[ 20.921588] drm_connector_property_set_ioctl+0x60/0x88
[ 20.926852] drm_ioctl_kernel+0xd0/0x120
[ 20.930807] drm_ioctl+0x21c/0x478
[ 20.934235] __arm64_sys_ioctl+0xa8/0xe0
[ 20.938193] invoke_syscall+0x64/0x130
[ 20.941977] el0_svc_common.constprop.3+0x5c/0xe0
[ 20.946716] do_el0_svc+0x80/0xa0
[ 20.950058] el0_svc+0x20/0x30
[ 20.953145] el0_sync_handler+0x88/0xb0
[ 20.957014] el0_sync+0x13c/0x140
The reason for the codepath seems dubious, the atomic suspend/resume
heplers should handle the power-collapse case. If not, the CRTC's
atomic_check() should be adding the planes to the atomic update.
Reported-by: Stephen Boyd <swboyd@chromium.org>
Reported-by: John Stultz <john.stultz@linaro.org>
Fixes: 37418bf14c13 ("drm: Use state helper instead of the plane state pointer")
Tested-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20210430171744.1721408-1-robdclark@gmail.com
Diffstat (limited to 'drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h')
| -rw-r--r-- | drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h index 03b6365a750c..34e03ac05f4a 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h @@ -85,12 +85,6 @@ void dpu_plane_get_ctl_flush(struct drm_plane *plane, struct dpu_hw_ctl *ctl, u32 *flush_sspp); /** - * dpu_plane_restore - restore hw state if previously power collapsed - * @plane: Pointer to drm plane structure - */ -void dpu_plane_restore(struct drm_plane *plane, struct drm_atomic_state *state); - -/** * dpu_plane_flush - final plane operations before commit flush * @plane: Pointer to drm plane structure */ |