diff mbox

[1078/1094] Revert "drm/i915: reverse dp link param selection, prefer fast over wide again"

Message ID 1413889294-31328-1079-git-send-email-dheerajx.s.jamwal@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Dheeraj Jamwal Oct. 21, 2014, 11:01 a.m. UTC 
From: Dave Airlie <airlied@redhat.com>

This reverts commit 38aecea0ccbb909d635619cba22f1891e589b434.

This breaks Haswell Thinkpad + Lenovo dock in SST mode with a HDMI monitor attached.

Before this we can 1920x1200 mode, after this we only ever get 1024x768, and
a lot of deferring.

This didn't revert clean, but this should be fine.

bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1117008
Cc: stable@vger.kernel.org # v3.15
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit c6930992948adf0f8fc1f6ff1da51c5002a2cf95)

Signed-off-by: Dheeraj Jamwal <dheerajx.s.jamwal@intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 65b16ff..0050256 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -906,8 +906,8 @@  intel_dp_compute_config(struct intel_encoder *encoder,
 		mode_rate = intel_dp_link_required(adjusted_mode->crtc_clock,
 						   bpp);
 
-		for (lane_count = min_lane_count; lane_count <= max_lane_count; lane_count <<= 1) {
-			for (clock = min_clock; clock <= max_clock; clock++) {
+		for (clock = min_clock; clock <= max_clock; clock++) {
+			for (lane_count = min_lane_count; lane_count <= max_lane_count; lane_count <<= 1) {
 				link_clock = drm_dp_bw_code_to_link_rate(bws[clock]);
 				link_avail = intel_dp_max_data_rate(link_clock,
 								    lane_count);