On Mon, Apr 30, 2018 at 03:55:41PM +0100, Robin Murphy wrote: > On 27/04/18 19:51, Linus Walleij wrote: > > On Fri, Apr 27, 2018 at 5:02 PM, Robin Murphy <robin.murphy@xxxxxxx> wrote: > > > > > I dug a little bit and it seems pl111_modeset_init() is deferring because it > > > can't find endpoint 0. And given that that's apparently pointing at some > > > non-existent panel rather than the DVI encoder as I would (naively) expect, > > > I can at least form a self-consistent explanation and give up on the grounds > > > that I'm probably missing some important DT changes. > > > > Yeah it does help if I also send the required DT changes :/ > > > > Sorry for my absentmindedness, I'll shoot it off right now so you > > can test it. > > Hooray, thanks for that. > > For these 2 patches with a V2P-CA15_A7 tile and the DT fixed up, > > Tested-by: Robin Murphy <robin.murphy@xxxxxxx> > > Framebuffer console and /dev/fb0 access for the motherboard CLCD works, and > it keeps out of the way as expected with CONFIG_DRM_HDLCD=y. I can't > convince an X session to start, but that appears more to do with sii902x > falling apart*, which I can't be bothered to even try debugging. > > Robin. > > > *specifically, lots of this, which I imagine is related to xorg trying to > either read the EDID or change mode: > ... > [ 243.439669] i2c i2c-0: sendbytes: NAK bailout. > [ 243.454247] i2c i2c-0: sendbytes: NAK bailout. > [ 247.743261] i2c i2c-0: sendbytes: NAK bailout. > [ 247.770281] sii902x 0-0039: failed to read status (-6) > [ 247.786609] i2c i2c-0: sendbytes: NAK bailout. > [ 248.118522] i2c i2c-0: sendbytes: NAK bailout. > [ 248.145485] sii902x 0-0039: failed to read status (-6) > [ 248.177800] i2c i2c-0: sendbytes: NAK bailout. > [ 258.256500] i2c i2c-0: sendbytes: NAK bailout. > [ 258.274763] i2c i2c-0: sendbytes: NAK bailout. > [ 268.499637] i2c i2c-0: sendbytes: NAK bailout. > [ 268.517899] i2c i2c-0: sendbytes: NAK bailout. That's a long standing issue that I've never got to the bottom of. The sii902x seems to have been wired in a curious way on the VExpress board and it is struggling to pass-through the I2C connection to the monitor. Best regards, Liviu > ... > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/dri-devel -- ==================== | I would like to | | fix the world, | | but they're not | | giving me the | \ source code! / --------------- ¯\_(ツ)_/¯ _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
