kernel/0001-Revert-drm-i915-revert-eDP-bpp-clamping-code-changes.patch
2013-05-03 21:20:16 -04:00

57 lines
2.0 KiB
Diff

From 883e2c26855e19e19bfb985221ae5a09db26a1c4 Mon Sep 17 00:00:00 2001
From: Josh Boyer <jwboyer@obiwan.gha.chartermi.net>
Date: Fri, 3 May 2013 17:10:32 -0400
Subject: [PATCH] Revert "drm/i915: revert eDP bpp clamping code changes"
This reverts commit 57c219633275c7e7413f8bc7be250dc092887458.
---
drivers/gpu/drm/i915/intel_dp.c | 18 ++++--------------
1 file changed, 4 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index fb2fbc1..e0ee2ca 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -702,6 +702,9 @@ intel_dp_compute_config(struct intel_encoder *encoder,
/* Walk through all bpp values. Luckily they're all nicely spaced with 2
* bpc in between. */
bpp = min_t(int, 8*3, pipe_config->pipe_bpp);
+ if (is_edp(intel_dp) && dev_priv->edp.bpp)
+ bpp = min_t(int, bpp, dev_priv->edp.bpp);
+
for (; bpp >= 6*3; bpp -= 2*3) {
mode_rate = intel_dp_link_required(target_clock, bpp);
@@ -739,6 +742,7 @@ found:
intel_dp->link_bw = bws[clock];
intel_dp->lane_count = lane_count;
adjusted_mode->clock = drm_dp_bw_code_to_link_rate(intel_dp->link_bw);
+ pipe_config->pipe_bpp = bpp;
pipe_config->pixel_target_clock = target_clock;
DRM_DEBUG_KMS("DP link bw %02x lane count %d clock %d bpp %d\n",
@@ -751,20 +755,6 @@ found:
target_clock, adjusted_mode->clock,
&pipe_config->dp_m_n);
- /*
- * XXX: We have a strange regression where using the vbt edp bpp value
- * for the link bw computation results in black screens, the panel only
- * works when we do the computation at the usual 24bpp (but still
- * requires us to use 18bpp). Until that's fully debugged, stay
- * bug-for-bug compatible with the old code.
- */
- if (is_edp(intel_dp) && dev_priv->edp.bpp) {
- DRM_DEBUG_KMS("clamping display bpc (was %d) to eDP (%d)\n",
- bpp, dev_priv->edp.bpp);
- bpp = min_t(int, bpp, dev_priv->edp.bpp);
- }
- pipe_config->pipe_bpp = bpp;
-
return true;
}
--
1.8.2.1