diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2018-02-08 07:28:00 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2018-02-08 13:43:14 +0000 |
| commit | bc8f2f5db9d75e7f990fb8362c28a8d2a7f33c9c (patch) | |
| tree | e9756a536bba72c68bffb8b8fb4d51faa8f72802 /drivers/gpu/drm/i915/intel_ringbuffer.c | |
| parent | 0d73e7a095f768fad5a002bf6732c675e2aee44b (diff) | |
drm/i915: Be paranoid and post the writes to stop the rings
Although the mmio are uncached and so should be flushed on every write,
be paranoid and do a mmio read after setting the ring head/tail to be
sure they have taken effect before moving on.
v2: post tail to be pleasing to the eye
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180208072800.595-1-chris@chris-wilson.co.uk
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_ringbuffer.c')
0 files changed, 0 insertions, 0 deletions