]> git.karo-electronics.de Git - linux-beck.git/commit
drm/i915: Dont -ETIMEDOUT on identical new and previous (count, crc).
authorRodrigo Vivi <rodrigo.vivi@intel.com>
Thu, 23 Jul 2015 23:35:50 +0000 (16:35 -0700)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Fri, 14 Aug 2015 16:16:29 +0000 (18:16 +0200)
commitaabc95dcf200908993573b2019ff5210121bcba9
tree8925c09e52c8af69a38823d0a854271c02fcc636
parent621d4c76fd4ce7f648fa59a26e3eb6b2346cf873
drm/i915: Dont -ETIMEDOUT on identical new and previous (count, crc).

By Vesa DP 1.2 spec TEST_CRC_COUNT is a "4 bit wrap counter which
increments each time the TEST_CRC_x_x are updated."

However if we are trying to verify the screen hasn't changed we get
same (count, crc) pair twice. Without this patch we would return
-ETIMEOUT in this case.

So, if in 6 vblanks the pair (count, crc) hasn't changed we
return it anyway instead of returning error and let test case decide
if it was right or not.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Rafael Antognolli <rafael.antognolli@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/intel_dp.c