Attachment 115878 Details for Bug 90460 – Patch that limits bpc to 10

[patch] Patch that limits bpc to 10

0001-drm-i915-Limit-max-bpc-to-10.patch (text/plain), 1.34 KB, created by Ander Conselvan de Oliveira on 2015-05-18 11:40:05 UTC

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Creator: Ander Conselvan de Oliveira

Created: 2015-05-18 11:40:05 UTC

Size: 1.34 KB

patch

obsolete

>From 98f7e7cc156e36db69f5c58914add311f75d9912 Mon Sep 17 00:00:00 2001
>From: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
>Date: Mon, 18 May 2015 14:31:45 +0300
>Subject: [PATCH] drm/i915: Limit max bpc to 10
>
>Since the following commit, it is possible that the driver will attempt
>to use a 12 bpc configuration. The is know to be broken with HDMI, so
>for now go back to the 10 bpc limit.
>
>commit d328c9d78d64ca11e744fe227096990430a88477
>Author: Daniel Vetter <daniel.vetter@ffwll.ch>
>Date:   Fri Apr 10 16:22:37 2015 +0200
>
>    drm/i915: Select starting pipe bpp irrespective or the primary plane
>
>Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90460
>Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
>---
> drivers/gpu/drm/i915/intel_display.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
>diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
>index a7732b4..cbb3cfb 100644
>--- a/drivers/gpu/drm/i915/intel_display.c
>+++ b/drivers/gpu/drm/i915/intel_display.c
>@@ -11227,7 +11227,8 @@ compute_baseline_pipe_bpp(struct intel_crtc *crtc,
> 	if ((IS_G4X(dev) || IS_VALLEYVIEW(dev)))
> 		bpp = 10*3;
> 	else if (INTEL_INFO(dev)->gen >= 5)
>-		bpp = 12*3;
>+		/* FIXME: gen >= 5 supports 12 bpc but that is broken with HDMI */
>+		bpp = 10*3;
> 	else
> 		bpp = 8*3;
> 
>-- 
>2.1.0
>

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