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drm/i915/lvds: Disable panel-fitter on gen4 for 1:1 scale factors 

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
hifive-unleashed-5.1
Chris Wilson 2010-11-29 16:19:24 +00:00
parent c4e7a41467
commit 257e48f147
1 changed files with 15 additions and 12 deletions
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27
drivers/gpu/drm/i915/intel_lvds.c
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@ -269,14 +269,13 @@ static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay;
u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay;
pfit_control |= PFIT_ENABLE;
/* 965+ is easy, it does everything in hw */
if (scaled_width > scaled_height)
pfit_control |= PFIT_SCALING_PILLAR;
pfit_control |= PFIT_ENABLE | PFIT_SCALING_PILLAR;
else if (scaled_width < scaled_height)
pfit_control |= PFIT_SCALING_LETTER;
else
pfit_control |= PFIT_SCALING_AUTO;
pfit_control |= PFIT_ENABLE | PFIT_SCALING_LETTER;
else if (adjusted_mode->hdisplay != mode->hdisplay)
pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO;
} else {
u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay;
u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay;
@ -323,13 +322,17 @@ static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
* Full scaling, even if it changes the aspect ratio.
* Fortunately this is all done for us in hw.
*/
pfit_control |= PFIT_ENABLE;
if (INTEL_INFO(dev)->gen >= 4)
pfit_control |= PFIT_SCALING_AUTO;
else
pfit_control |= (VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
VERT_INTERP_BILINEAR |
HORIZ_INTERP_BILINEAR);
if (mode->vdisplay != adjusted_mode->vdisplay ||
mode->hdisplay != adjusted_mode->hdisplay) {
pfit_control |= PFIT_ENABLE;
if (INTEL_INFO(dev)->gen >= 4)
pfit_control |= PFIT_SCALING_AUTO;
else
pfit_control |= (VERT_AUTO_SCALE |
VERT_INTERP_BILINEAR |
HORIZ_AUTO_SCALE |
HORIZ_INTERP_BILINEAR);
}
break;
default: