3.6.11.2 stable review patch.
If anyone has any objections, please let me know.
------------------
From: Takashi Iwai <ti...@suse.de>
[ Upstream commit 3b4f819d5eac94ba8fe5e8c061f6dabfe8d7b22c ]
This reverts commit 0d71068835e2610576d369d6d4cbf90e0f802a71.
Not only that the commit introduces a bogus check (voltage_tries == 5
will never meet at the inserted code path), it brings the i915 driver
into an endless dp-train loop on HP Z1 desktop machine with IVY+eDP.
At least reverting this commit recovers the framebuffer (but X is
still broken by other reasons...)
Cc: <sta...@vger.kernel.org>
Signed-off-by: Takashi Iwai <ti...@suse.de>
Signed-off-by: Daniel Vetter <daniel.vet...@ffwll.ch>
Signed-off-by: Steven Rostedt <rost...@goodmis.org>
---
drivers/gpu/drm/i915/intel_dp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index ace757a..82e5e0d 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1771,7 +1771,7 @@ intel_dp_start_link_train(struct intel_dp *intel_dp)
for (i = 0; i < intel_dp->lane_count; i++)
if ((intel_dp->train_set[i] &
DP_TRAIN_MAX_SWING_REACHED) == 0)
break;
- if (i == intel_dp->lane_count && voltage_tries == 5) {
+ if (i == intel_dp->lane_count) {
++loop_tries;
if (loop_tries == 5) {
DRM_DEBUG_KMS("too many full retries, give
up\n");
--
1.7.10.4
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