From 3dd7b97458e8aa2d8985b46622d226fa635071e7 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Fri, 27 Jun 2014 19:49:57 +0300 Subject: [PATCH] drm/i915: Hack to tie both common lanes together on chv MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit It looks like frobbing the cmnreset line on pne PHY disturbs the other PHY on chv. The result is a black screen. On HDMI it's just a flash of black, but DP usually falls over and can't get back up. As a workaround set up the power domains so that both common lane wells power up and down together. I also tried leaving the cmnreset deasserted even the if the power well goes down but that didn't seem acceptable to the PHY. Reviewed-by: Rafael Barbalho Signed-off-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- Reading git-format-patch failed