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

drm/i915: PSR: Don't Skip aux handshake on DP_PSR_NO_TRAIN_ON_EXIT.

Browse source 
Since the beginning there is a confusion on the meaning of this bit.

A previous patch had identified this already and fixed it partially:
'commit 3301d409 ("drm/i915: PSR: Fix DP_PSR_NO_TRAIN_ON_EXIT logic")

DP_PSR_NO_TRAIN_ON_EXIT means the source doesn't need to do the
training, but it doesn't tell to avoid TP patterns or to skip
aux handshake.

This patch fixes the hard freeze reported.

Reference: https://bugs.freedesktop.org/show_bug.cgi?id=91436
Reference: https://bugs.freedesktop.org/show_bug.cgi?id=91437

Cc: Ivan Mitev <ivan.mitev@gmail.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Durgadoss R <durgadoss.r@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Rodrigo Vivi 2015-11-11 11:37:09 -08:00 committed by Daniel Vetter
parent 20bb97fe0e
commit bebbeaca84
1 changed files with 0 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/gpu/drm/i915/intel_psr.c
View file

@ -287,7 +287,6 @@ static void hsw_psr_enable_source(struct intel_dp *intel_dp)
send the minimal TP1 possible and skip TP2. */
val |= EDP_PSR_TP1_TIME_100us;
val |= EDP_PSR_TP2_TP3_TIME_0us;
val |= EDP_PSR_SKIP_AUX_EXIT;
/* Sink should be able to train with the 5 or 6 idle patterns */
idle_frames += 4;
}