From mboxrd@z Thu Jan 1 00:00:00 1970 From: Benjamin Herrenschmidt Date: Mon, 18 May 2020 12:46:54 +0000 Subject: Re: [PATCH v2 2/2] powerpc/configs: replace deprecated riva/nvidia with nouveau Message-Id: <9ea9bd468fbce85b666991cde4196b88c7929e1d.camel@kernel.crashing.org> List-Id: References: <20200517220524.4036334-1-emil.l.velikov@gmail.com> <20200517220524.4036334-2-emil.l.velikov@gmail.com> <87d071aedu.fsf@mpe.ellerman.id.au> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Emil Velikov , Michael Ellerman Cc: linux-fbdev , Bartlomiej Zolnierkiewicz , ML dri-devel , Paul Mackerras , linuxppc-dev On Mon, 2020-05-18 at 12:19 +0100, Emil Velikov wrote: > > - attempted out-of-bound attempts to read the vbios So on these things, the actual ROM doesn't contain what you want, but the device-tree has a property "NVDA,BMP" that contains some kind of mini-BIOS (around 2.4KB) which should contain the necessary tables the driver is looking for. I think nouveau has code to find these in nvkm/subdev/bios/shadowof.c, so at least that should have been working, but maybe some debugging/instrumentation would be useful there. > Genuine concern or noise? Likely using the bios from open firmware, > check any of the other options - see NvBios in [1] > - cannot figure out the timer input frequency > No idea > - the TV1 EDID is empty > Is there an actual TV connected to the device, check with another cable Probaby not. > Regardless of the patches, reporting [2] the above would be a nice move. > > Thanks > Emil > [1] https://nouveau.freedesktop.org/wiki/KernelModuleParameters/ > [2] https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/-/issues