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drm/i915: Ensure that the crtcinfo is populated during mode_fixup()

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This should fix the mysterious mode setting failures reported during
boot up and after resume, generally for i8xx class machines.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=16478
Reported-and-tested-by: Xavier Chantry <chantry.xavier@gmail.com>
Buzilla: https://bugs.freedesktop.org/show_bug.cgi?id=29413
Tested-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org
This commit is contained in:
Chris Wilson 2010-09-12 18:25:19 +01:00
parent dd8849c8f5
commit 897493504a
1 changed files with 8 additions and 0 deletions
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8
drivers/gpu/drm/i915/intel_display.c
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@ -2463,11 +2463,19 @@ static bool intel_crtc_mode_fixup(struct drm_crtc *crtc,
struct drm_display_mode *adjusted_mode)
{
struct drm_device *dev = crtc->dev;
if (HAS_PCH_SPLIT(dev)) {
/* FDI link clock is fixed at 2.7G */
if (mode->clock * 3 > IRONLAKE_FDI_FREQ * 4)
return false;
}
/* XXX some encoders set the crtcinfo, others don't.
* Obviously we need some form of conflict resolution here...
*/
if (adjusted_mode->crtc_htotal == 0)
drm_mode_set_crtcinfo(adjusted_mode, 0);
return true;
}