Hi Alexander, > From: Alexander Stein [mailto:alexander.stein at systec-electronic.com] > Sent: Wednesday, May 25, 2016 4:32 PM > To: Stefan Agner <stefan at agner.ch> > Cc: Meng Yi <meng.yi at nxp.com>; dri-devel at lists.freedesktop.org; David > Airlie > <airlied at linux.ie>; airlied at redhat.com; linux-kernel at > vger.kernel.org; Mark > Brown <broonie at kernel.org> > Subject: Re: fsl-dcu not works on latest "drm-next" > > On Tuesday 24 May 2016 23:20:02, Stefan Agner wrote: > > On 2016-05-24 19:14, Meng Yi wrote: > > > I found that its regmap endianness issue, so I want to replace the > > > "regmap". > > Hm, replace with what? Note that we need some kind of endianness > > convertion since the IP is big endian on LS1021a and little endian on > > Vybrid (vf610). > > Yep, regmap is required and was broken meanwhile but should be fixed now. > See linked lkml post. > > > Is it maybe just an issue with regmap/the big-endian property in the > > device tree? Maybe this thread is interesting for you: > > https://lkml.org/lkml/2016/3/23/233 > > AFAICT device tree should not been changed here. The "big-endian" property > was there fromt he beginning. > > > > I just tested the latest drm-next branch on Freescale/NXP > > > ls1021a-twr, and got some log below. And fsl-dcu not works. > > > > > > Since "drm-next" merged some branch , use git bisect had some > > > problem , > > > > > > so I manually checked out that "fsl-dcu" works at > > > d761701c55a99598477f3cb25c03d939a7711e74 > > > > > > And not works now. some log below: > > Which commit actually broke your kernel? And where to fetch it from? Is your > problem really caused by regmap?
Since there are lots of merge commit, I had manually debugged that issue. And yes, it is caused by regmap. I fetched the kernel from git://people.freedesktop.org/~airlied/linux Best Regards, Meng Yi
