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drm/i915: fix the CFB size check 

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>
Link: http://patchwork.freedesktop.org/patch/msgid/
This commit is contained in:
Paulo Zanoni 2015-10-16 16:44:43 -03:00
parent bffce907d6
commit 90d5234fdb
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/intel_fbc.c
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@ -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 */