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Bugzilla: 1117008
Upstream-status: Sent to intel-gfx
From b22370f0cf68e49ddcb3dd7033aba5ff6454dfcc Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@redhat.com>
Date: Mon, 14 Jul 2014 10:54:20 +1000
Subject: [PATCH] Revert "drm/i915: reverse dp link param selection, prefer
fast over wide again"
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>
---
drivers/gpu/drm/i915/intel_dp.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 2a00cb8..61963d3 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -833,8 +833,8 @@ 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);
--
1.9.3
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