From: Paulo Zanoni Date: Tue, 13 Oct 2015 21:04:45 +0000 (-0300) Subject: drm/i915: set dev_priv->fbc.crtc before scheduling the enable work X-Git-Tag: MMI-PSA29.97-13-9~7427^2~45^2~1029 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e9c5fd26ac38ec64497b86d70472f8dd750410ad;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git drm/i915: set dev_priv->fbc.crtc before scheduling the enable work This thing where we need to get the crtc either from the work structure or the fbc structure itself is confusing and unnecessary. Set fbc.crtc right when scheduling the enable work so we can always use it. The problem is not what gets passed and how to retrieve it. The problem is that when we're in the other parts of the code we always have to keep in mind that if FBC is already enabled we have to get the CRTC from place A, if FBC is scheduled we have to get the CRTC from place B, and if it's disabled there's no CRTC. Having a single place to retrieve the CRTC from allows us to treat the "is enabled" and "is scheduled" cases as the same case, reducing the mistake surface. I guess I should add this to the commit message. Besides the immediate advantages, this is also going to make one of the next commits much simpler. And even later, when we introduce enable/disable + activate/deactivate, this will be even simpler as we'll set the CRTC at enable time. So all the activate/deactivate/update code can just look at the single CRTC variable regardless of the current state. v2: Improve commit message (Chris). v3: Rebase after changing the patch order. Reviewed-by: Chris Wilson Signed-off-by: Paulo Zanoni Link: http://patchwork.freedesktop.org/patch/msgid/ --- diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index ba611c710860..e9ea7c44e492 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -921,7 +921,6 @@ struct i915_fbc { struct intel_fbc_work { struct delayed_work work; - struct intel_crtc *crtc; struct drm_framebuffer *fb; } *fbc_work; diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c index 9eb94c04ce69..70b55c0cf28e 100644 --- a/drivers/gpu/drm/i915/intel_fbc.c +++ b/drivers/gpu/drm/i915/intel_fbc.c @@ -334,14 +334,13 @@ bool intel_fbc_enabled(struct drm_i915_private *dev_priv) return dev_priv->fbc.enabled; } -static void intel_fbc_enable(struct intel_crtc *crtc, - const struct drm_framebuffer *fb) +static void intel_fbc_enable(const struct drm_framebuffer *fb) { - struct drm_i915_private *dev_priv = crtc->base.dev->dev_private; + struct drm_i915_private *dev_priv = fb->dev->dev_private; + struct intel_crtc *crtc = dev_priv->fbc.crtc; dev_priv->fbc.enable_fbc(crtc); - dev_priv->fbc.crtc = crtc; dev_priv->fbc.fb_id = fb->base.id; dev_priv->fbc.y = crtc->base.y; } @@ -351,8 +350,8 @@ static void intel_fbc_work_fn(struct work_struct *__work) struct intel_fbc_work *work = container_of(to_delayed_work(__work), struct intel_fbc_work, work); - struct drm_i915_private *dev_priv = work->crtc->base.dev->dev_private; - struct drm_framebuffer *crtc_fb = work->crtc->base.primary->fb; + struct drm_i915_private *dev_priv = work->fb->dev->dev_private; + struct drm_framebuffer *crtc_fb = dev_priv->fbc.crtc->base.primary->fb; mutex_lock(&dev_priv->fbc.lock); if (work == dev_priv->fbc.fbc_work) { @@ -360,7 +359,7 @@ static void intel_fbc_work_fn(struct work_struct *__work) * the prior work. */ if (crtc_fb == work->fb) - intel_fbc_enable(work->crtc, work->fb); + intel_fbc_enable(work->fb); dev_priv->fbc.fbc_work = NULL; } @@ -400,15 +399,15 @@ static void intel_fbc_schedule_enable(struct intel_crtc *crtc) WARN_ON(!mutex_is_locked(&dev_priv->fbc.lock)); intel_fbc_cancel_work(dev_priv); + dev_priv->fbc.crtc = crtc; work = kzalloc(sizeof(*work), GFP_KERNEL); if (work == NULL) { DRM_ERROR("Failed to allocate FBC work structure\n"); - intel_fbc_enable(crtc, crtc->base.primary->fb); + intel_fbc_enable(crtc->base.primary->fb); return; } - work->crtc = crtc; work->fb = crtc->base.primary->fb; INIT_DELAYED_WORK(&work->work, intel_fbc_work_fn); @@ -984,11 +983,8 @@ void intel_fbc_invalidate(struct drm_i915_private *dev_priv, mutex_lock(&dev_priv->fbc.lock); - if (dev_priv->fbc.enabled) + if (dev_priv->fbc.enabled || dev_priv->fbc.fbc_work) fbc_bits = INTEL_FRONTBUFFER_PRIMARY(dev_priv->fbc.crtc->pipe); - else if (dev_priv->fbc.fbc_work) - fbc_bits = INTEL_FRONTBUFFER_PRIMARY( - dev_priv->fbc.fbc_work->crtc->pipe); else fbc_bits = dev_priv->fbc.possible_framebuffer_bits;