Attachment 115896 Details for Bug 90460 – Second attempt

[patch] Second attempt

0001-drm-i915-Don-t-attempt-to-use-12-bpc-with-HDMI.patch (text/plain), 1.66 KB, created by Ander Conselvan de Oliveira on 2015-05-19 09:05:19 UTC

(hide)

Description:

Filename:

MIME Type:

Creator: Ander Conselvan de Oliveira

Created: 2015-05-19 09:05:19 UTC

Size: 1.66 KB

patch

obsolete

>From 32eb2c3857d3553191a16b23065b7abf3ade45a3 Mon Sep 17 00:00:00 2001
>From: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
>Date: Tue, 19 May 2015 12:00:26 +0300
>Subject: [PATCH] drm/i915: Don't attempt to use 12 bpc with HDMI
>
>Since the following commit, it is possible that the driver will attempt
>to use a 12 bpc configuration. This is know to be broken with HDMI, so
>for now go back to previous 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
>
>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_hdmi.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
>diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
>index 590d46b..0ecc7cf 100644
>--- a/drivers/gpu/drm/i915/intel_hdmi.c
>+++ b/drivers/gpu/drm/i915/intel_hdmi.c
>@@ -1028,6 +1028,7 @@ bool intel_hdmi_compute_config(struct intel_encoder *encoder,
> 	if (pipe_config->has_hdmi_sink && intel_hdmi->has_audio)
> 		pipe_config->has_audio = true;
> 
>+#if 0
> 	/*
> 	 * HDMI is either 12 or 8, so if the display lets 10bpc sneak
> 	 * through, clamp it down. Note that g4x/vlv don't support 12bpc hdmi
>@@ -1042,7 +1043,9 @@ bool intel_hdmi_compute_config(struct intel_encoder *encoder,
> 
> 		/* Need to adjust the port link by 1.5x for 12bpc. */
> 		pipe_config->port_clock = clock_12bpc;
>-	} else {
>+	} else
>+#endif
>+	{
> 		DRM_DEBUG_KMS("picking bpc to 8 for HDMI output\n");
> 		desired_bpp = 8*3;
> 	}
>-- 
>2.1.0
>

Actions: View | Splinter Review

Attachments on bug 90460: 115791 | 115878 | 115892 | 115896

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.