From: Paulo Zanoni Date: Tue, 14 Jul 2015 19:29:10 +0000 (-0300) Subject: drm/i915: fix FBC frontbuffer tracking flushing code X-Git-Tag: firefly_0821_release~176^2~721^2~33^2~187 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6f4551fe8e7f3561b97b7f74d8f4af08db01de6f;p=firefly-linux-kernel-4.4.55.git drm/i915: fix FBC frontbuffer tracking flushing code Due to the way busy_bits was handled, we were not doing any flushes if we didn't previously get an invalidate. Since it's possible to get flushes without an invalidate first, remove the busy_bits early return. So now that we don't have the busy_bits guard anymore we'll need the origin check for the GTT tracking (we were not doing anything on GTT flushes due to the GTT check at invalidate()). As a last detail, since we can get multiple consecutive flushes, disable FBC before updating it, otherwise intel_fbc_update() will just keep FBC enabled instead of restarting it. Notice that this does not fix any of the current IGT tests due to the fact that we still have a few intel_fbc() calls at points where we also have the frontbuffer tracking calls: we didn't fully convert to frontbuffer tracking yet. Once we remove those calls and start relying only on the frontbuffer tracking infrastructure we'll need this patch. Signed-off-by: Paulo Zanoni Reviewed-by: Rodrigo Vivi Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 3b00d00c0bc0..817a4169d3b8 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -1239,7 +1239,7 @@ void intel_fbc_invalidate(struct drm_i915_private *dev_priv, unsigned int frontbuffer_bits, enum fb_op_origin origin); void intel_fbc_flush(struct drm_i915_private *dev_priv, - unsigned int frontbuffer_bits); + unsigned int frontbuffer_bits, enum fb_op_origin origin); const char *intel_no_fbc_reason_str(enum no_fbc_reason reason); void intel_fbc_cleanup_cfb(struct drm_i915_private *dev_priv); diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c index c271af767981..1f97fb548c2a 100644 --- a/drivers/gpu/drm/i915/intel_fbc.c +++ b/drivers/gpu/drm/i915/intel_fbc.c @@ -884,22 +884,23 @@ void intel_fbc_invalidate(struct drm_i915_private *dev_priv, } void intel_fbc_flush(struct drm_i915_private *dev_priv, - unsigned int frontbuffer_bits) + unsigned int frontbuffer_bits, enum fb_op_origin origin) { if (!dev_priv->fbc.enable_fbc) return; - mutex_lock(&dev_priv->fbc.lock); + if (origin == ORIGIN_GTT) + return; - if (!dev_priv->fbc.busy_bits) - goto out; + mutex_lock(&dev_priv->fbc.lock); dev_priv->fbc.busy_bits &= ~frontbuffer_bits; - if (!dev_priv->fbc.busy_bits) + if (!dev_priv->fbc.busy_bits) { + __intel_fbc_disable(dev_priv); __intel_fbc_update(dev_priv); + } -out: mutex_unlock(&dev_priv->fbc.lock); } diff --git a/drivers/gpu/drm/i915/intel_frontbuffer.c b/drivers/gpu/drm/i915/intel_frontbuffer.c index 777b1d3ccd41..ac85357010b4 100644 --- a/drivers/gpu/drm/i915/intel_frontbuffer.c +++ b/drivers/gpu/drm/i915/intel_frontbuffer.c @@ -129,7 +129,7 @@ static void intel_frontbuffer_flush(struct drm_device *dev, intel_edp_drrs_flush(dev, frontbuffer_bits); intel_psr_flush(dev, frontbuffer_bits, origin); - intel_fbc_flush(dev_priv, frontbuffer_bits); + intel_fbc_flush(dev_priv, frontbuffer_bits, origin); } /**