redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

drm/i915: disable hotplug detect before Ironlake CRT detect

Browse source 
This tries to fix CRT detect loop hang seen on some Ironlake form
factor, to clear up hotplug detect state before taking CRT detect
to make sure next hotplug detect cycle is consistent.

Cc: Stable Team <stable@kernel.org>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Zhenyu Wang 2010-01-25 10:35:16 +08:00 committed by Eric Anholt
parent 92dcffb916
commit eceb784cec
1 changed files with 3 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
drivers/gpu/drm/i915/intel_crt.c
View file

@ -157,6 +157,9 @@ static bool intel_ironlake_crt_detect_hotplug(struct drm_connector *connector)
adpa = I915_READ(PCH_ADPA);
adpa &= ~ADPA_CRT_HOTPLUG_MASK;
/* disable HPD first */
I915_WRITE(PCH_ADPA, adpa);
(void)I915_READ(PCH_ADPA);
adpa |= (ADPA_CRT_HOTPLUG_PERIOD_128 |
ADPA_CRT_HOTPLUG_WARMUP_10MS |