drm/i915/gt: Increase a time to retry RING_HEAD reset

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Issue seen again where engine resets fails because the engine resumes from
an incorrect RING_HEAD. HEAD is still not 0 even after writing into it.
This seems to be timing issue and we experimented different values from 5ms
to 50ms and found out that 50ms works best based on testing.
So, if write doesn't succeed at first then retry again.

v2: add a comment (Andi Shyti)

Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/12806
Signed-off-by: Nitin Gote <nitin.r.gote@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241217063532.2729031-1-nitin.r.gote@intel.com

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Nitin Gote 2024-12-17 12:05:32 +05:30 • committed by Andi Shyti

parent f373ebec18

commit 512eadb334

1 changed files with 7 additions and 2 deletions

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drivers/gpu/drm/i915/gt/intel_ring_submission.c

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