* [PATCH] drm/i915: Revert ea0000f0 "Roll out the helper nonblock tracking"
@ 2016-11-27 18:52 Jim Rees
2016-12-20 14:27 ` Jani Nikula
0 siblings, 1 reply; 3+ messages in thread
From: Jim Rees @ 2016-11-27 18:52 UTC (permalink / raw)
To: Daniel Vetter; +Cc: intel-gfx
Commit ea0000f0 has been causing multiple problems for i915 users. See for
example:
https://bugs.freedesktop.org/show_bug.cgi?id=96781
https://bugs.freedesktop.org/show_bug.cgi?id=97529
https://bugzilla.redhat.com/show_bug.cgi?id=1385228
https://forums.opensuse.org/showthread.php/520969-drm-915-Resetting-chip-after-gpu-hang
Those last two are not confirmed but look like the same problem.
This has only been lightly tested and probably shouldn't go upstream yet.
Signed-off-by: Jim Rees <rees@umich.edu>
---
drivers/gpu/drm/i915/intel_display.c | 10 ----------
1 file changed, 10 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 81c1149..c31c9e4 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -14346,8 +14346,6 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
WARN_ON(ret);
}
- drm_atomic_helper_wait_for_dependencies(state);
-
if (intel_state->modeset) {
memcpy(dev_priv->min_pixclk, intel_state->min_pixclk,
sizeof(intel_state->min_pixclk));
@@ -14470,8 +14468,6 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
if (intel_state->modeset && intel_can_enable_sagv(state))
intel_enable_sagv(dev_priv);
- drm_atomic_helper_commit_hw_done(state);
-
if (intel_state->modeset)
intel_display_power_put(dev_priv, POWER_DOMAIN_MODESET);
@@ -14479,8 +14475,6 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
drm_atomic_helper_cleanup_planes(dev, state);
mutex_unlock(&dev->struct_mutex);
- drm_atomic_helper_commit_cleanup_done(state);
-
drm_atomic_state_free(state);
/* As one of the primary mmio accessors, KMS has a high likelihood
@@ -14546,10 +14540,6 @@ static int intel_atomic_commit(struct drm_device *dev,
return -EINVAL;
}
- ret = drm_atomic_helper_setup_commit(state, nonblock);
- if (ret)
- return ret;
-
INIT_WORK(&state->commit_work, intel_atomic_commit_work);
ret = intel_atomic_prepare_commit(dev, state, nonblock);
--
2.10.2
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] drm/i915: Revert ea0000f0 "Roll out the helper nonblock tracking"
2016-11-27 18:52 [PATCH] drm/i915: Revert ea0000f0 "Roll out the helper nonblock tracking" Jim Rees
@ 2016-12-20 14:27 ` Jani Nikula
2016-12-21 9:50 ` Daniel Vetter
0 siblings, 1 reply; 3+ messages in thread
From: Jani Nikula @ 2016-12-20 14:27 UTC (permalink / raw)
To: Jim Rees, Daniel Vetter; +Cc: intel-gfx
On Sun, 27 Nov 2016, Jim Rees <rees@umich.edu> wrote:
> Commit ea0000f0 has been causing multiple problems for i915 users. See for
> example:
>
> https://bugs.freedesktop.org/show_bug.cgi?id=96781
> https://bugs.freedesktop.org/show_bug.cgi?id=97529
> https://bugzilla.redhat.com/show_bug.cgi?id=1385228
> https://forums.opensuse.org/showthread.php/520969-drm-915-Resetting-chip-after-gpu-hang
>
> Those last two are not confirmed but look like the same problem.
>
> This has only been lightly tested and probably shouldn't go upstream yet.
>
> Signed-off-by: Jim Rees <rees@umich.edu>
Daniel, any comments on this one?
BR,
Jani.
> ---
> drivers/gpu/drm/i915/intel_display.c | 10 ----------
> 1 file changed, 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 81c1149..c31c9e4 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -14346,8 +14346,6 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
> WARN_ON(ret);
> }
>
> - drm_atomic_helper_wait_for_dependencies(state);
> -
> if (intel_state->modeset) {
> memcpy(dev_priv->min_pixclk, intel_state->min_pixclk,
> sizeof(intel_state->min_pixclk));
> @@ -14470,8 +14468,6 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
> if (intel_state->modeset && intel_can_enable_sagv(state))
> intel_enable_sagv(dev_priv);
>
> - drm_atomic_helper_commit_hw_done(state);
> -
> if (intel_state->modeset)
> intel_display_power_put(dev_priv, POWER_DOMAIN_MODESET);
>
> @@ -14479,8 +14475,6 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
> drm_atomic_helper_cleanup_planes(dev, state);
> mutex_unlock(&dev->struct_mutex);
>
> - drm_atomic_helper_commit_cleanup_done(state);
> -
> drm_atomic_state_free(state);
>
> /* As one of the primary mmio accessors, KMS has a high likelihood
> @@ -14546,10 +14540,6 @@ static int intel_atomic_commit(struct drm_device *dev,
> return -EINVAL;
> }
>
> - ret = drm_atomic_helper_setup_commit(state, nonblock);
> - if (ret)
> - return ret;
> -
> INIT_WORK(&state->commit_work, intel_atomic_commit_work);
>
> ret = intel_atomic_prepare_commit(dev, state, nonblock);
--
Jani Nikula, Intel Open Source Technology Center
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] drm/i915: Revert ea0000f0 "Roll out the helper nonblock tracking"
2016-12-20 14:27 ` Jani Nikula
@ 2016-12-21 9:50 ` Daniel Vetter
0 siblings, 0 replies; 3+ messages in thread
From: Daniel Vetter @ 2016-12-21 9:50 UTC (permalink / raw)
To: Jani Nikula; +Cc: intel-gfx, Jim Rees, Daniel Vetter
On Tue, Dec 20, 2016 at 04:27:42PM +0200, Jani Nikula wrote:
> On Sun, 27 Nov 2016, Jim Rees <rees@umich.edu> wrote:
> > Commit ea0000f0 has been causing multiple problems for i915 users. See for
> > example:
> >
> > https://bugs.freedesktop.org/show_bug.cgi?id=96781
> > https://bugs.freedesktop.org/show_bug.cgi?id=97529
> > https://bugzilla.redhat.com/show_bug.cgi?id=1385228
> > https://forums.opensuse.org/showthread.php/520969-drm-915-Resetting-chip-after-gpu-hang
> >
> > Those last two are not confirmed but look like the same problem.
> >
> > This has only been lightly tested and probably shouldn't go upstream yet.
> >
> > Signed-off-by: Jim Rees <rees@umich.edu>
>
> Daniel, any comments on this one?
So root-cause is that vblank waits die, and from one of the bug reports it
sounds like drm-tip has that fixed. For that we need a reverse bisect to
find the bugfix so that we can backport it.
But vblank timeout shouldn't result in oopses, the helpers are meant to
carry on in such a case (although with some horribly long timeouts). From
the backtraces I think I know what's going on and how to paper over that,
typing a patch right now.
-Daniel
>
> BR,
> Jani.
>
>
> > ---
> > drivers/gpu/drm/i915/intel_display.c | 10 ----------
> > 1 file changed, 10 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> > index 81c1149..c31c9e4 100644
> > --- a/drivers/gpu/drm/i915/intel_display.c
> > +++ b/drivers/gpu/drm/i915/intel_display.c
> > @@ -14346,8 +14346,6 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
> > WARN_ON(ret);
> > }
> >
> > - drm_atomic_helper_wait_for_dependencies(state);
> > -
> > if (intel_state->modeset) {
> > memcpy(dev_priv->min_pixclk, intel_state->min_pixclk,
> > sizeof(intel_state->min_pixclk));
> > @@ -14470,8 +14468,6 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
> > if (intel_state->modeset && intel_can_enable_sagv(state))
> > intel_enable_sagv(dev_priv);
> >
> > - drm_atomic_helper_commit_hw_done(state);
> > -
> > if (intel_state->modeset)
> > intel_display_power_put(dev_priv, POWER_DOMAIN_MODESET);
> >
> > @@ -14479,8 +14475,6 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
> > drm_atomic_helper_cleanup_planes(dev, state);
> > mutex_unlock(&dev->struct_mutex);
> >
> > - drm_atomic_helper_commit_cleanup_done(state);
> > -
> > drm_atomic_state_free(state);
> >
> > /* As one of the primary mmio accessors, KMS has a high likelihood
> > @@ -14546,10 +14540,6 @@ static int intel_atomic_commit(struct drm_device *dev,
> > return -EINVAL;
> > }
> >
> > - ret = drm_atomic_helper_setup_commit(state, nonblock);
> > - if (ret)
> > - return ret;
> > -
> > INIT_WORK(&state->commit_work, intel_atomic_commit_work);
> >
> > ret = intel_atomic_prepare_commit(dev, state, nonblock);
>
> --
> Jani Nikula, Intel Open Source Technology Center
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply [flat|nested] 3+ messages in thread
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2016-11-27 18:52 [PATCH] drm/i915: Revert ea0000f0 "Roll out the helper nonblock tracking" Jim Rees
2016-12-20 14:27 ` Jani Nikula
2016-12-21 9:50 ` Daniel Vetter
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