[kernel] r19266 - in dists/sid/linux/debian: . patches patches/bugfix/x86

[Ben Hutchings]

Author: benh
Date: Sat Jul 21 18:06:28 2012
New Revision: 19266

Log:
[x86] drm/i915: prefer wide & slow to fast & narrow in DP configs (Closes: #658662)

Added:
   dists/sid/linux/debian/patches/bugfix/x86/drm-i915-prefer-wide-slow-to-fast-narrow-in-DP-confi.patch
Modified:
   dists/sid/linux/debian/changelog
   dists/sid/linux/debian/patches/series

Modified: dists/sid/linux/debian/changelog
==============================================================================
--- dists/sid/linux/debian/changelog	Sat Jul 21 17:49:18 2012	(r19265)
+++ dists/sid/linux/debian/changelog	Sat Jul 21 18:06:28 2012	(r19266)
@@ -38,6 +38,8 @@
     - Refactor sub-channel use
     - Bump version to 1.0.0
   * e100: ucode is optional in some cases
+  * [x86] drm/i915: prefer wide & slow to fast & narrow in DP configs
+    (Closes: #658662)
 
   [ Arnaud Patard ]
   * [mipsel] add r8169 to d-i udeb.

Added: dists/sid/linux/debian/patches/bugfix/x86/drm-i915-prefer-wide-slow-to-fast-narrow-in-DP-confi.patch
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ dists/sid/linux/debian/patches/bugfix/x86/drm-i915-prefer-wide-slow-to-fast-narrow-in-DP-confi.patch	Sat Jul 21 18:06:28 2012	(r19266)
@@ -0,0 +1,33 @@
+From: Jesse Barnes <jbarnes at virtuousgeek.org>
+Date: Thu, 21 Jun 2012 15:13:50 -0700
+Subject: drm/i915: prefer wide & slow to fast & narrow in DP configs
+
+commit 2514bc510d0c3aadcc5204056bb440fa36845147 upstream.
+
+High frequency link configurations have the potential to cause trouble
+with long and/or cheap cables, so prefer slow and wide configurations
+instead.  This patch has the potential to cause trouble for eDP
+configurations that lie about available lanes, so if we run into that we
+can make it conditional on eDP.
+
+Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=45801
+Tested-by: peter at colberg.org
+Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
+Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
+---
+ drivers/gpu/drm/i915/intel_dp.c |    4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+--- a/drivers/gpu/drm/i915/intel_dp.c
++++ b/drivers/gpu/drm/i915/intel_dp.c
+@@ -708,8 +708,8 @@ intel_dp_mode_fixup(struct drm_encoder *
+ 
+ 	bpp = adjusted_mode->private_flags & INTEL_MODE_DP_FORCE_6BPC ? 18 : 24;
+ 
+-	for (lane_count = 1; lane_count <= max_lane_count; lane_count <<= 1) {
+-		for (clock = 0; clock <= max_clock; clock++) {
++	for (clock = 0; clock <= max_clock; clock++) {
++		for (lane_count = 1; lane_count <= max_lane_count; lane_count <<= 1) {
+ 			int link_avail = intel_dp_max_data_rate(intel_dp_link_clock(bws[clock]), lane_count);
+ 
+ 			if (intel_dp_link_required(mode->clock, bpp)

Modified: dists/sid/linux/debian/patches/series
==============================================================================
--- dists/sid/linux/debian/patches/series	Sat Jul 21 17:49:18 2012	(r19265)
+++ dists/sid/linux/debian/patches/series	Sat Jul 21 18:06:28 2012	(r19266)
@@ -380,3 +380,4 @@
 features/all/fermi-accel/drm-nvd0-disp-ignore-clock-set-if-no-pclk.patch
 features/all/fermi-accel/drm-nouveau-bump-version-to-1.0.0.patch
 bugfix/all/net-e100-ucode-is-optional-in-some-cases.patch
+bugfix/x86/drm-i915-prefer-wide-slow-to-fast-narrow-in-DP-confi.patch