[Intel-gfx] Sony VAIO VPC-SA2 blinking/waves on LVDS

[Daniel Vetter]

On Tue, Oct 11, 2011 at 01:50:34PM +0400, Олег Герман wrote:
> > I'd wager this is dithering gone wrong. Can you boot with drm.debug=0xe
> > and attach the full dmesg? Also please attach xrandr --verbose.
> 
> also bug is not reproduced on external monitors

Can you try the below patch, please?
-Daniel

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index f0e5f9f..d145527 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5533,7 +5533,7 @@ static int ironlake_crtc_mode_set(struct drm_crtc *crtc,
 	pipeconf &= ~PIPECONF_DITHER_TYPE_MASK;
 	if ((is_lvds && dev_priv->lvds_dither) || dither) {
 		pipeconf |= PIPECONF_DITHER_EN;
-		pipeconf |= PIPECONF_DITHER_TYPE_ST1;
+		//pipeconf |= PIPECONF_DITHER_TYPE_ST1;
 	}
 	if (is_dp || intel_encoder_is_pch_edp(&has_edp_encoder->base)) {
 		intel_dp_set_m_n(crtc, mode, adjusted_mode);

-- 
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48