Attachment 128711 Details for Bug 99250 – Patch

[patch] Patch

0001-Fix-BPP-clamping-on-HDMI.patch (text/plain), 1.23 KB, created by Nicholas Sielicki on 2017-01-02 21:09:57 UTC

(hide)

Description:

Filename:

MIME Type:

Creator: Nicholas Sielicki

Created: 2017-01-02 21:09:57 UTC

Size: 1.23 KB

patch

obsolete

>From e66225885feed7b10129f246fcbbbc49ad4517be Mon Sep 17 00:00:00 2001
>From: Nicholas Sielicki <sielicki@yandex.com>
>Date: Sun, 1 Jan 2017 01:30:12 -0600
>Subject: [PATCH 1/1] Fix BPP clamping on HDMI
>
>When a monitor connected via HDMI reported an EDID with BPP greater than 24,
>BPP was assumed to be sufficient for 12BPC. This is not a safe assumption due
>to some monitors reporting BPP in-between 24 and 36, eg: 30, which must be
>rounded down rather than up.
>---
> drivers/gpu/drm/i915/intel_hdmi.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
>index fb88e32e25a3..58811fb1ab81 100644
>--- a/drivers/gpu/drm/i915/intel_hdmi.c
>+++ b/drivers/gpu/drm/i915/intel_hdmi.c
>@@ -1349,7 +1349,7 @@ bool intel_hdmi_compute_config(struct intel_encoder *encoder,
> 	 * outputs. We also need to check that the higher clock still fits
> 	 * within limits.
> 	 */
>-	if (pipe_config->pipe_bpp > 8*3 && pipe_config->has_hdmi_sink &&
>+	if (pipe_config->pipe_bpp >= 12*3 && pipe_config->has_hdmi_sink &&
> 	    hdmi_port_clock_valid(intel_hdmi, clock_12bpc, true) == MODE_OK &&
> 	    hdmi_12bpc_possible(pipe_config)) {
> 		DRM_DEBUG_KMS("picking bpc to 12 for HDMI output\n");
>-- 
>2.11.0
>

Actions: View | Splinter Review

Attachments on bug 99250: 128711 | 128712 | 128761 | 128762 | 128785

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.