44 lines
1.6 KiB
Diff
44 lines
1.6 KiB
Diff
Bugzilla: 1117008
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Upstream-status: Sent to intel-gfx
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From b22370f0cf68e49ddcb3dd7033aba5ff6454dfcc Mon Sep 17 00:00:00 2001
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From: Dave Airlie <airlied@redhat.com>
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Date: Mon, 14 Jul 2014 10:54:20 +1000
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Subject: [PATCH] Revert "drm/i915: reverse dp link param selection, prefer
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fast over wide again"
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This reverts commit 38aecea0ccbb909d635619cba22f1891e589b434.
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This breaks Haswell Thinkpad + Lenovo dock in SST mode with a HDMI monitor attached.
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Before this we can 1920x1200 mode, after this we only ever get 1024x768, and
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a lot of deferring.
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This didn't revert clean, but this should be fine.
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bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1117008
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Cc: stable@vger.kernel.org # v3.15
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Signed-off-by: Dave Airlie <airlied@redhat.com>
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---
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drivers/gpu/drm/i915/intel_dp.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
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index 2a00cb8..61963d3 100644
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--- a/drivers/gpu/drm/i915/intel_dp.c
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+++ b/drivers/gpu/drm/i915/intel_dp.c
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@@ -833,8 +833,8 @@ intel_dp_compute_config(struct intel_encoder *encoder,
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mode_rate = intel_dp_link_required(adjusted_mode->crtc_clock,
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bpp);
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- for (lane_count = min_lane_count; lane_count <= max_lane_count; lane_count <<= 1) {
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- for (clock = min_clock; clock <= max_clock; clock++) {
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+ for (clock = min_clock; clock <= max_clock; clock++) {
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+ for (lane_count = min_lane_count; lane_count <= max_lane_count; lane_count <<= 1) {
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link_clock = drm_dp_bw_code_to_link_rate(bws[clock]);
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link_avail = intel_dp_max_data_rate(link_clock,
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lane_count);
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--
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1.9.3
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