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[3.5.y.z,extended,stable] Patch "drm/edid: add quirk for BPC in Samsung NP700G7A-S01PL notebook" has been added to staging queue

Message ID 1389190839-11865-1-git-send-email-luis.henriques@canonical.com
State New
Headers show

Commit Message

Luis Henriques Jan. 8, 2014, 2:20 p.m. UTC 
This is a note to let you know that I have just added a patch titled

    drm/edid: add quirk for BPC in Samsung NP700G7A-S01PL notebook

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

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From b89efe9e6da3f7b57007075c57b9eff37384feb9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
Date: Sat, 7 Dec 2013 13:22:42 +0100
Subject: drm/edid: add quirk for BPC in Samsung NP700G7A-S01PL notebook
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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commit 49d45a31b71d7d9da74485922bdb63faf3dc9684 upstream.

This bug in EDID was exposed by:

commit eccea7920cfb009c2fa40e9ecdce8c36f61cab66
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Mon Mar 26 15:12:54 2012 -0400

    drm/radeon/kms: improve bpc handling (v2)

Which resulted in kind of regression in 3.5. This fixes
https://bugs.freedesktop.org/show_bug.cgi?id=70934

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/gpu/drm/drm_edid.c | 8 ++++++++
 1 file changed, 8 insertions(+)

--
1.8.3.2
diff mbox

Patch

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index bdbc6a2..92735dd 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -68,6 +68,8 @@ 
 #define EDID_QUIRK_DETAILED_SYNC_PP		(1 << 6)
 /* Force reduced-blanking timings for detailed modes */
 #define EDID_QUIRK_FORCE_REDUCED_BLANKING	(1 << 7)
+/* Force 8bpc */
+#define EDID_QUIRK_FORCE_8BPC			(1 << 8)

 struct detailed_mode_closure {
 	struct drm_connector *connector;
@@ -128,6 +130,9 @@  static struct edid_quirk {

 	/* Medion MD 30217 PG */
 	{ "MED", 0x7b8, EDID_QUIRK_PREFER_LARGE_75 },
+
+	/* Panel in Samsung NP700G7A-S01PL notebook reports 6bpc */
+	{ "SEC", 0xd033, EDID_QUIRK_FORCE_8BPC },
 };

 /*** DDC fetch and block validation ***/
@@ -1934,6 +1939,9 @@  int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)

 	drm_add_display_info(edid, &connector->display_info);

+	if (quirks & EDID_QUIRK_FORCE_8BPC)
+		connector->display_info.bpc = 8;
+
 	return num_modes;
 }
 EXPORT_SYMBOL(drm_add_edid_modes);