This patch series cleans up the DDC code a little bit so that it is more efficient time wise and supports grabbing the EDID of the eDP panel over the aux channel. I timed this on a board I have on my desk and it takes about 20ms to grab the EDID out of the panel and make sure it is valid.
The first two patches seem less controversial so I stuck them at the beginning. The third patch does the EDID reading and caches it so we don't have to keep grabbing it over and over again. And finally the last patch updates the reply field so that short reads and nacks over the channel are reflected properly instead of treating them as some sort of error that can't be discerned.
Stephen Boyd (4): drm/bridge: ti-sn65dsi86: Combine register accesses in ti_sn_aux_transfer() drm/bridge: ti-sn65dsi86: Make polling a busy loop drm/bridge: ti-sn65dsi86: Read EDID blob over DDC drm/bridge: ti-sn65dsi86: Update reply on aux failures
drivers/gpu/drm/bridge/ti-sn65dsi86.c | 108 ++++++++++++++++++-------- 1 file changed, 75 insertions(+), 33 deletions(-)
Cc: Douglas Anderson dianders@chromium.org Cc: Laurent Pinchart Laurent.pinchart@ideasonboard.com Cc: Jonas Karlman jonas@kwiboo.se Cc: Jernej Skrabec jernej.skrabec@siol.net Cc: Sean Paul seanpaul@chromium.org
base-commit: 3650b228f83adda7e5ee532e2b90429c03f7b9ec