Skip to contentSkip to conversation

Patch "drm/edid: Add EDID_QUIRK_FORCE_8BPC quirk for Rotel RSX-1058" has been added to the 4.4-stable tree

PATCH [email protected] 1 participant 1 message Mar 12, 2017

Subsystems (3)
lore
Share & tools
lore

[email protected]

author maintainer Applied
#0 lore raw

This is a note to let you know that I've just added the patch titled

drm/edid: Add EDID_QUIRK_FORCE_8BPC quirk for Rotel RSX-1058

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:

     drm-edid-add-edid_quirk_force_8bpc-quirk-for-rotel-rsx-1058.patch

and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From 36fc579761b50784b63dafd0f2e796b659e0f5ee Mon Sep 17 00:00:00 2001

From: Tomeu Vizoso <[email protected]>
Date: Mon, 20 Feb 2017 16:25:45 +0100
Subject: drm/edid: Add EDID_QUIRK_FORCE_8BPC quirk for Rotel RSX-1058
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Tomeu Vizoso <[email protected]>

commit 36fc579761b50784b63dafd0f2e796b659e0f5ee upstream.

Rotel RSX-1058 is a receiver with 4 HDMI inputs and a HDMI output, all 1.1.

When a sink that supports deep color is connected to the output, the receiver will send EDIDs that advertise this capability, even if it isn't possible with HDMI versions earlier than 1.3.

Currently the kernel is assuming that deep color is possible and the sink displays an error.

This quirk will make sure that deep color isn't used with this particular receiver.

Fixes 7a0baa623446 ("Revert "drm/i915: Disable 12bpc hdmi for now"")
Cc Matt Horan <[email protected]>

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99869

---
 drivers/gpu/drm/drm_edid.c |    3 +++
 1 file changed, 3 insertions(+)
drivers/gpu/drm/drm_edid.c +3 -0
@@ -144,6 +144,9 @@ static struct edid_quirk {
 
 	/* Panel in Samsung NP700G7A-S01PL notebook reports 6bpc */
 	{ "SEC", 0xd033, EDID_QUIRK_FORCE_8BPC },
+
+	/* Rotel RSX-1058 forwards sink's EDID but only does HDMI 1.1*/
+	{ "ETR", 13896, EDID_QUIRK_FORCE_8BPC },
 };
 
 /*

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/drm-edid-add-edid_quirk_force_8bpc-quirk-for-rotel-rsx-1058.patch