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drm/i915: Don't preserve DPFC_CONTROL bits ILK/SNB

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On CTG and IVB+ we don't try to preserve any bits from the
DPFC_CONTROL register. Follow suit on ILK/SNB.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2014-01-23 16:49:14 +02:00 committed by Daniel Vetter
parent 768cf7f440
commit 46f3dab92f
1 changed files with 1 additions and 3 deletions
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4
drivers/gpu/drm/i915/intel_pm.c
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@ -227,9 +227,7 @@ static void ironlake_enable_fbc(struct drm_crtc *crtc)
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
u32 dpfc_ctl;
dpfc_ctl = I915_READ(ILK_DPFC_CONTROL);
dpfc_ctl &= DPFC_RESERVED;
dpfc_ctl |= DPFC_CTL_PLANE(intel_crtc->plane);
dpfc_ctl = DPFC_CTL_PLANE(intel_crtc->plane);
if (drm_format_plane_cpp(fb->pixel_format, 0) == 2)
dpfc_ctl |= DPFC_CTL_LIMIT_2X;
else