Hi Morimoto-san, On Tuesday, 6 November 2018 16:30:35 EET Laurent Pinchart wrote: > On Thursday, 18 October 2018 05:12:14 EET Kuninori Morimoto wrote: > > Hi Vladimir, Laurent > > > > I'm testing ULCB board, and I noticed that HDMI doen't work on it. > > > > - Sometimes kernel panic happen (I lost log, but it said "get crc" > > > > something error), - Often, kernel doesn't boot with below log if I > > connected HDMI cable when booting > > > > - Monitor say "No signal" if I connected cable *after* booting > > > > I'm using Geert's renesas-drivers-2018-10-09-v4.19-rc7 branch. > > It seems salvator HDMI is working correctly on it. > > I attached my .config > > I tried to reproduce the problem, starting with drm-next which seems to work > fine, moving to renesas-drivers-2018-10-09-v4.19-rc7 which also didn't > exhibit any issue. I then used your kernel configuration, and got a WARN_ON > \o/
Investigations revealed that you're missing the CONFIG_COMMON_CLK_VC5=y option in your kernel configuration. It also revealed a bug in the error handling code of the DU driver, for which I have just sent "[PATCH] drm: rcar-du: Fix external clock error checks". -- Regards, Laurent Pinchart
