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drm/i915: Gen2 FBC1 CFB pitch wants 32B units

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On gen2 the compressed frame buffer pitch is specified in 32B units
rather than the 64B units used on gen3+.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2013-11-28 17:29:56 +02:00 committed by Daniel Vetter
parent 566b734a19
commit 42a430f51c
1 changed files with 5 additions and 2 deletions
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7
drivers/gpu/drm/i915/intel_pm.c
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@ -104,8 +104,11 @@ static void i8xx_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
if (fb->pitches[0] < cfb_pitch)
cfb_pitch = fb->pitches[0];
/* FBC_CTL wants 64B units */
cfb_pitch = (cfb_pitch / 64) - 1;
/* FBC_CTL wants 32B or 64B units */
if (IS_GEN2(dev))
cfb_pitch = (cfb_pitch / 32) - 1;
else
cfb_pitch = (cfb_pitch / 64) - 1;
plane = intel_crtc->plane == 0 ? FBC_CTL_PLANEA : FBC_CTL_PLANEB;
/* Clear old tags */