* [PATCH] drm/msm/dpu: Delete bonkers code
@ 2021-04-30 17:17 Rob Clark
2021-04-30 17:37 ` John Stultz
2021-04-30 17:44 ` Stephen Boyd
0 siblings, 2 replies; 5+ messages in thread
From: Rob Clark @ 2021-04-30 17:17 UTC (permalink / raw)
To: dri-devel
Cc: Rob Clark, open list:DRM DRIVER FOR MSM ADRENO GPU,
Thomas Zimmermann, Stephen Boyd, Lee Jones,
open list:DRM DRIVER FOR MSM ADRENO GPU, Hongbo Yao, open list,
Abhinav Kumar, Stephen Boyd, David Airlie, Qinglang Miao,
Maxime Ripard, Kalyan Thota, Sean Paul, Laurent Pinchart
From: Rob Clark <robdclark@chromium.org>
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 <sboyd@kernel.org>
Reported-by: John Stultz <john.stultz@linaro.org>
Fixes: 37418bf14c13 drm: Use state helper instead of the plane state pointer
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 10 ----------
drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 16 ----------------
drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h | 6 ------
3 files changed, 32 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index 7c29976be243..18bc76b7f1a3 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -648,16 +648,6 @@ static void dpu_crtc_atomic_flush(struct drm_crtc *crtc,
if (unlikely(!cstate->num_mixers))
return;
- /*
- * For planes without commit update, drm framework will not add
- * those planes to current state since hardware update is not
- * required. However, if those planes were power collapsed since
- * last commit cycle, driver has to restore the hardware state
- * of those planes explicitly here prior to plane flush.
- */
- drm_atomic_crtc_for_each_plane(plane, crtc)
- dpu_plane_restore(plane, state);
-
/* update performance setting before crtc kickoff */
dpu_core_perf_crtc_update(crtc, 1, false);
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index df7f3d3afd8b..7a993547eb75 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -1258,22 +1258,6 @@ static void dpu_plane_atomic_update(struct drm_plane *plane,
}
}
-void dpu_plane_restore(struct drm_plane *plane, struct drm_atomic_state *state)
-{
- struct dpu_plane *pdpu;
-
- if (!plane || !plane->state) {
- DPU_ERROR("invalid plane\n");
- return;
- }
-
- pdpu = to_dpu_plane(plane);
-
- DPU_DEBUG_PLANE(pdpu, "\n");
-
- dpu_plane_atomic_update(plane, state);
-}
-
static void dpu_plane_destroy(struct drm_plane *plane)
{
struct dpu_plane *pdpu = plane ? to_dpu_plane(plane) : NULL;
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
@@ -84,12 +84,6 @@ bool is_dpu_plane_virtual(struct drm_plane *plane);
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
--
2.30.2
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https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] drm/msm/dpu: Delete bonkers code
2021-04-30 17:17 [PATCH] drm/msm/dpu: Delete bonkers code Rob Clark
@ 2021-04-30 17:37 ` John Stultz
2021-04-30 17:44 ` Stephen Boyd
1 sibling, 0 replies; 5+ messages in thread
From: John Stultz @ 2021-04-30 17:37 UTC (permalink / raw)
To: Rob Clark
Cc: Rob Clark, open list:DRM DRIVER FOR MSM ADRENO GPU,
Thomas Zimmermann, Stephen Boyd, Hongbo Yao,
open list:DRM DRIVER FOR MSM ADRENO GPU, Abhinav Kumar,
open list, dri-devel, Stephen Boyd, David Airlie, Qinglang Miao,
Maxime Ripard, Kalyan Thota, Lee Jones, Sean Paul,
Laurent Pinchart
On Fri, Apr 30, 2021 at 10:14 AM Rob Clark <robdclark@gmail.com> wrote:
>
> From: Rob Clark <robdclark@chromium.org>
>
> 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.
Thanks! This patch gets things booting again!
Tested-by: John Stultz <john.stultz@linaro.org>
thanks
-john
_______________________________________________
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https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] drm/msm/dpu: Delete bonkers code
2021-04-30 17:17 [PATCH] drm/msm/dpu: Delete bonkers code Rob Clark
2021-04-30 17:37 ` John Stultz
@ 2021-04-30 17:44 ` Stephen Boyd
2021-05-03 8:19 ` Maxime Ripard
1 sibling, 1 reply; 5+ messages in thread
From: Stephen Boyd @ 2021-04-30 17:44 UTC (permalink / raw)
To: Rob Clark, dri-devel
Cc: Rob Clark, freedreno, Thomas Zimmermann, David Airlie, Lee Jones,
linux-arm-msm, Hongbo Yao, linux-kernel, Abhinav Kumar,
Stephen Boyd, Qinglang Miao, Maxime Ripard, Kalyan Thota,
Sean Paul, Laurent Pinchart
Quoting Rob Clark (2021-04-30 10:17:39)
> From: Rob Clark <robdclark@chromium.org>
>
> 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 <sboyd@kernel.org>
Maybe better to use swboyd@chromium.org for this one.
> Reported-by: John Stultz <john.stultz@linaro.org>
> Fixes: 37418bf14c13 drm: Use state helper instead of the plane state pointer
Should be
Fixes: 37418bf14c13 ("drm: Use state helper instead of the plane state pointer")
to match the preferred format.
> Signed-off-by: Rob Clark <robdclark@chromium.org>
Otherwise looks good, thanks.
_______________________________________________
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dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] drm/msm/dpu: Delete bonkers code
2021-04-30 17:44 ` Stephen Boyd
@ 2021-05-03 8:19 ` Maxime Ripard
0 siblings, 0 replies; 5+ messages in thread
From: Maxime Ripard @ 2021-05-03 8:19 UTC (permalink / raw)
To: Stephen Boyd
Cc: Rob Clark, freedreno, Thomas Zimmermann, David Airlie, Lee Jones,
linux-arm-msm, Hongbo Yao, linux-kernel, dri-devel,
Qinglang Miao, Abhinav Kumar, Kalyan Thota, Sean Paul,
Laurent Pinchart
[-- Attachment #1.1: Type: text/plain, Size: 2563 bytes --]
Hi,
On Fri, Apr 30, 2021 at 10:44:53AM -0700, Stephen Boyd wrote:
> Quoting Rob Clark (2021-04-30 10:17:39)
> > From: Rob Clark <robdclark@chromium.org>
> >
> > 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 <sboyd@kernel.org>
>
> Maybe better to use swboyd@chromium.org for this one.
>
> > Reported-by: John Stultz <john.stultz@linaro.org>
> > Fixes: 37418bf14c13 drm: Use state helper instead of the plane state pointer
>
> Should be
>
> Fixes: 37418bf14c13 ("drm: Use state helper instead of the plane state pointer")
>
> to match the preferred format.
>
> > Signed-off-by: Rob Clark <robdclark@chromium.org>
>
> Otherwise looks good, thanks.
Thanks for figuring this out, I've applied it with your chromium address
and the proper fixes format.
Maxime
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^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH] drm/msm/dpu: Delete bonkers code
2021-06-01 22:47 [PATCH v4 0/6] iommu/arm-smmu: adreno-smmu page fault handling Rob Clark
@ 2021-06-01 22:47 ` Rob Clark
0 siblings, 0 replies; 5+ messages in thread
From: Rob Clark @ 2021-06-01 22:47 UTC (permalink / raw)
To: dri-devel
Cc: David Airlie, Jordan Crouse, Laurent Pinchart, Lee Jones,
Rob Clark, Qinglang Miao, Sakari Ailus,
open list:DRM DRIVER FOR MSM ADRENO GPU, Abhinav Kumar,
Stephen Boyd, Maxime Ripard, Kalyan Thota, Sean Paul,
Stephen Boyd, open list, Thomas Zimmermann, Dmitry Baryshkov,
open list:DRM DRIVER FOR MSM ADRENO GPU
From: Rob Clark <robdclark@chromium.org>
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 <sboyd@kernel.org>
Reported-by: John Stultz <john.stultz@linaro.org>
Fixes: 37418bf14c13 drm: Use state helper instead of the plane state pointer
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 10 ----------
drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 16 ----------------
drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h | 6 ------
3 files changed, 32 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index 7c29976be243..18bc76b7f1a3 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -648,16 +648,6 @@ static void dpu_crtc_atomic_flush(struct drm_crtc *crtc,
if (unlikely(!cstate->num_mixers))
return;
- /*
- * For planes without commit update, drm framework will not add
- * those planes to current state since hardware update is not
- * required. However, if those planes were power collapsed since
- * last commit cycle, driver has to restore the hardware state
- * of those planes explicitly here prior to plane flush.
- */
- drm_atomic_crtc_for_each_plane(plane, crtc)
- dpu_plane_restore(plane, state);
-
/* update performance setting before crtc kickoff */
dpu_core_perf_crtc_update(crtc, 1, false);
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index df7f3d3afd8b..7a993547eb75 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -1258,22 +1258,6 @@ static void dpu_plane_atomic_update(struct drm_plane *plane,
}
}
-void dpu_plane_restore(struct drm_plane *plane, struct drm_atomic_state *state)
-{
- struct dpu_plane *pdpu;
-
- if (!plane || !plane->state) {
- DPU_ERROR("invalid plane\n");
- return;
- }
-
- pdpu = to_dpu_plane(plane);
-
- DPU_DEBUG_PLANE(pdpu, "\n");
-
- dpu_plane_atomic_update(plane, state);
-}
-
static void dpu_plane_destroy(struct drm_plane *plane)
{
struct dpu_plane *pdpu = plane ? to_dpu_plane(plane) : NULL;
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
@@ -84,12 +84,6 @@ bool is_dpu_plane_virtual(struct drm_plane *plane);
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
--
2.30.2
^ permalink raw reply related [flat|nested] 5+ messages in thread
end of thread, other threads:[~2021-06-01 22:44 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-04-30 17:17 [PATCH] drm/msm/dpu: Delete bonkers code Rob Clark
2021-04-30 17:37 ` John Stultz
2021-04-30 17:44 ` Stephen Boyd
2021-05-03 8:19 ` Maxime Ripard
2021-06-01 22:47 [PATCH v4 0/6] iommu/arm-smmu: adreno-smmu page fault handling Rob Clark
2021-06-01 22:47 ` [PATCH] drm/msm/dpu: Delete bonkers code Rob Clark
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