drm/i915: Don't try to ack sink irqs when there are none

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My ASUS PB278 at least doesn't seem to appreciate when you try to
ack sink irqs when there are none. Results in this sort of dmesg spam
[drm:drm_dp_dpcd_access] too many retries, giving up

Let's skip the ack if there are no pending irqs. I have no clue why we
do this in two places. One of them likely should just go away. Oh, and
MST has its own sink irq handler too...

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1469717448-4297-12-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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Ville Syrjälä 2016-07-28 17:50:47 +03:00

parent 1354f734c5

commit 65fbb4e799

1 changed files with 6 additions and 4 deletions

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drivers/gpu/drm/i915/intel_dp.c

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