drm/i915/execlists: Add a paranoid flush of the CSB pointers upon reset

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After a GPU reset, we need to drain all the CS events so that we have an
accurate picture of the execlists state at the time of the reset. Be
paranoid and force a read of the CSB write pointer from memory.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190912092933.4729-1-chris@chris-wilson.co.uk

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Chris Wilson 2019-09-12 10:29:32 +01:00

parent e3cb653d5c

commit 582a6f90aa

1 changed files with 4 additions and 0 deletions

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

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