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[01/11] drm/i915: fix the CFB size check

Message ID 1449058527-13425-2-git-send-email-paulo.r.zanoni@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Zanoni, Paulo R Dec. 2, 2015, 12:15 p.m. UTC 
In function find_compression_threshold() we try to over-allocate CFB
space in order to reduce reallocations and fragmentation, and we're
not considering that at the CFB size check. Consider it.

There is also a longer-term plan to kill
dev_priv->fbc.uncompressed_size, but this will come later.

v2: Use drm_mm_node_allocated() (Chris).

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/gpu/drm/i915/intel_fbc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c
index 11fc528..9eb94c0 100644
--- a/drivers/gpu/drm/i915/intel_fbc.c
+++ b/drivers/gpu/drm/i915/intel_fbc.c
@@ -720,7 +720,8 @@  static int intel_fbc_setup_cfb(struct intel_crtc *crtc)
 	size = intel_fbc_calculate_cfb_size(crtc);
 	cpp = drm_format_plane_cpp(fb->pixel_format, 0);
 
-	if (size <= dev_priv->fbc.uncompressed_size)
+	if (drm_mm_node_allocated(&dev_priv->fbc.compressed_fb) &&
+	    size <= dev_priv->fbc.compressed_fb.size * dev_priv->fbc.threshold)
 		return 0;
 
 	/* Release any current block */