On Tue, Sep 04, 2018 at 05:29:02PM +0100, Chris Wilson wrote:
> If the previous modeset commit has completed and is no longer part of
> the crtc state, skip waiting for it.
>
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107792
> Fixes: c44301fce614 ("drm/i915: Allow control of PSR at runtime through
> debugfs, v6")
> Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
> Cc: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
> Cc: Rodrigo Vivi <rodrigo.v...@intel.com>
> Cc: Dhinakaran Pandiyan <dhinakaran.pandi...@intel.com>
> ---
> drivers/gpu/drm/i915/intel_psr.c | 16 ++++++++++------
> 1 file changed, 10 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_psr.c
> b/drivers/gpu/drm/i915/intel_psr.c
> index 21984d4c08ed..bddc9c7c681e 100644
> --- a/drivers/gpu/drm/i915/intel_psr.c
> +++ b/drivers/gpu/drm/i915/intel_psr.c
> @@ -834,6 +834,7 @@ int intel_psr_set_debugfs_mode(struct drm_i915_private
> *dev_priv,
> struct drm_device *dev = &dev_priv->drm;
> struct drm_connector_state *conn_state;
> struct intel_crtc_state *crtc_state = NULL;
> + struct drm_crtc_commit *commit = NULL;
> struct drm_crtc *crtc;
> struct intel_dp *dp;
> int ret;
> @@ -860,12 +861,15 @@ int intel_psr_set_debugfs_mode(struct drm_i915_private
> *dev_priv,
> return ret;
>
> crtc_state = to_intel_crtc_state(crtc->state);
> - ret =
> wait_for_completion_interruptible(&crtc_state->base.commit->hw_done);
> - } else
> - ret =
> wait_for_completion_interruptible(&conn_state->commit->hw_done);
> -
> - if (ret)
> - return ret;
> + commit = crtc_state->base.commit;
> + } else {
> + commit = conn_state->commit;
I can't even find where we clear state->commit after its done.
Do we just leave it pointing at freed memory or something? Also I
can't figure out why drm_atomic_helper_commit_hw_done() copies
the commit also to the old state.
> + }
> + if (commit) {
> + ret = wait_for_completion_interruptible(&commit->hw_done);
> + if (ret)
> + return ret;
> + }
>
> ret = mutex_lock_interruptible(&dev_priv->psr.lock);
> if (ret)
> --
> 2.19.0.rc1
>
> _______________________________________________
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> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Ville Syrjälä
Intel
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