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Commit 44f46b42 authored by Chris Wilson's avatar Chris Wilson Committed by Daniel Vetter
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drm/i915: Cantiga+ cannot handle a hsync front porch of 0 

This addresses WaPruneModeWithIncorrectHsyncOffset.

Bugzilla: http://bugs.freedesktop.org/show_bug.cgi?id=50236


Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent de9932d1

drivers/gpu/drm/i915/intel_display.c

+7 −0
Original line number Original line Diff line number Diff line
@@ -3602,6 +3602,13 @@ static bool intel_crtc_mode_fixup(struct drm_crtc *crtc, 
	if (!(adjusted_mode->private_flags & INTEL_MODE_CRTC_TIMINGS_SET))

	if (!(adjusted_mode->private_flags & INTEL_MODE_CRTC_TIMINGS_SET))

		drm_mode_set_crtcinfo(adjusted_mode, 0);

		drm_mode_set_crtcinfo(adjusted_mode, 0);





	/* WaPruneModeWithIncorrectHsyncOffset: Cantiga+ cannot handle modes

	 * with a hsync front porch of 0.

	 */

	if ((INTEL_INFO(dev)->gen > 4 || IS_G4X(dev)) &&

		adjusted_mode->hsync_start == adjusted_mode->hdisplay)

		return false;



	return true;

	return true;

}

}