On Thu, Oct 22, 2015 at 02:10:52AM +0300, Laurent Pinchart wrote: > Hi Wolfram, > > On Thursday 03 September 2015 22:20:09 Wolfram Sang wrote: > > From: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx> > > > > Setting up new messages was done in process context while handling a > > message was in interrupt context. Because of the HW design, this IP core > > is sensitive to timing, so the context switches were too expensive. Move > > this setup to interrupt context as well. > > > > In my test setup, this fixed the occasional 'data byte sent twice' issue > > which a number of people have seen. It also fixes to send REP_START > > after a read message which was wrongly send as a STOP + START sequence > > before. > > I'm afraid this patch has been found by git bisect to break HDMI on Koelsch > :-( > > The regmap_read(adv7511->regmap, ADV7511_REG_CHIP_REVISION, &val) call in > drivers/gpu/drm/i2c/adv7511.c returns -ENXIO. > > Reverting the patch on top of Geert's current drivers master branch fixes the > problem. But HDMI worked on Koelsch in Dublin??
Attachment:
signature.asc
Description: Digital signature
