[BUG] radeon: suspend resume

[Sami Kerola]

On 15 July 2013 11:35, Michel Dänzer <michel at daenzer.net> wrote:
> On Son, 2013-07-14 at 13:26 +0100, Sami Kerola wrote:
>>
>> Jul 14 12:51:31 kerolasa-home kernel: radeon 0000:00:01.0: GPU lockup
>> CP stall for more than 10000msec
>> Jul 14 12:51:31 kerolasa-home kernel: radeon 0000:00:01.0: GPU lockup
>> (waiting for 0x0000000000000004 last fence id 0x0000000000000002)
>> Jul 14 12:51:31 kerolasa-home kernel: [drm:r600_uvd_ib_test] *ERROR*
>> radeon: fence wait failed (-35).
>> Jul 14 12:51:31 kerolasa-home kernel: [drm:radeon_ib_ring_tests]
>> *ERROR* radeon: failed testing IB on ring 5 (-35).
>
> Looks like the patch from
> https://bugs.freedesktop.org/show_bug.cgi?id=66425 might help.

Hi Michel,

I tried this patch

https://bugs.freedesktop.org/show_bug.cgi?id=66425#c21

which nearly completely applied. The non-applied line is below, and
which I left that way as it seems there are referrals to the uvd_fw
firmware elsewhere in code.

diff a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
(rejected hunks)
@@ -1683,7 +1685,6 @@ struct radeon_device {
        const struct firmware *rlc_fw;  /* r6/700 RLC firmware */
        const struct firmware *mc_fw;   /* NI MC firmware */
        const struct firmware *ce_fw;   /* SI CE firmware */
-       const struct firmware *uvd_fw;  /* UVD firmware */
        struct r600_blit r600_blit;
        struct r600_vram_scratch vram_scratch;
        int msi_enabled; /* msi enabled */

When trying the patch made things worse. Errors started to occur at
suspend, which took a while and reported some errors. After waiting
for ~20 seconds my screen had pixel mush in all possible colours, and
the system was unresponsive. Please see the file from URL for all
messages I found from log.

http://www.iki.fi/kerolasa/radeon-suspend-3.10.0-09289-g9903883.gz

--
Sami Kerola
http://www.iki.fi/kerolasa/