drm/i915: write D_COMP using the mailbox

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You can't write it using the MCHBAR mirror, the write will just get
dropped.

This should make us BSpec-compliant, but there's no real bug I could
reproduce that is fixed by this patch.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
[danvet: Fix spelling mistake in the comment that Damien spotted.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

...

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Paulo Zanoni 2013-09-10 19:36:37 -03:00 • committed by Daniel Vetter

parent 507c1a4548

commit 515b239269

2 changed files with 12 additions and 2 deletions

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4

drivers/gpu/drm/i915/i915_reg.h

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10

drivers/gpu/drm/i915/intel_display.c

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