Hi Michael,

On Mon, 18 May 2020 at 08:30, Michael Ellerman [off-list ref] wrote:

Emil Velikov [off-list ref] writes:

quoted

As mentioned in earlier commit, the riva and nvidia fbdev drivers have
seen no love over the years, are short on features and overall below par

Users are encouraged to switch to the nouveau drm driver instead.

v2: Split configs to separate patch, enable nouveau (Bartlomiej)

Cc: Antonino Daplas <adaplas@gmail.com>
Cc: Bartlomiej Zolnierkiewicz <redacted>
Cc: linux-fbdev@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <redacted>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Emil Velikov <redacted>
Acked-by: Daniel Vetter <redacted> (v1)
---
Hi all unless, there are objections I would prefer to merge this via
the drm tree.

Have you tested that the resulting kernels work on the relevant
hardware?

Sadly, no I haven't. I'm updating the defconfigs as requested by the
fbdev maintainer.

The old drivers may be crufty but they presumably have been tested by
people and at least somewhat work.

So I'd be inclined to leave the defconfigs alone until someone can test
that the new driver works at all.

Works for me.

I gave it a quick spin on a G5 I have access to and dmesg has a bunch of
errors in it (see below). I can't actually tell if the display is
working because the machine is remote, and I can't go and check it at
the moment because the office is closed.

From what I can see, there seems to be three bits:
 - attempted out-of-bound attempts to read the vbios
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

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