This is a note to let you know that I've just added the patch titled
drm: don't add inferred modes for monitors that don't support them
to the 3.4-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-don-t-add-inferred-modes-for-monitors-that-don-t-support-them.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From 196e077dc165a307efbd9e7569f81bbdbcf18f65 Mon Sep 17 00:00:00 2001
From: Paulo Zanoni <paulo.r.zan...@intel.com>
Date: Fri, 15 Feb 2013 13:36:27 -0200
Subject: drm: don't add inferred modes for monitors that don't support them
From: Paulo Zanoni <paulo.r.zan...@intel.com>
commit 196e077dc165a307efbd9e7569f81bbdbcf18f65 upstream.
If bit 0 of the features byte (0x18) is set to 0, then, according to
the EDID spec, "the display is non-continuous frequency (multi-mode)
and is only specified to accept the video timing formats that are
listed in Base EDID and certain Extension Blocks".
For more information, please see the EDID spec, check the notes of the
table that explains the "Feature Support" byte (18h) and also the
notes on the tables of the section that explains "Display Range Limits
& Additional Timing Description Definition (tag #FDh)".
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=45729
Reviewed-by: Alex Deucher <alexander.deuc...@amd.com>
Reviewed-by: Adam Jackson <a...@redhat.com>
Signed-off-by: Paulo Zanoni <paulo.r.zan...@intel.com>
Signed-off-by: Dave Airlie <airl...@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/gpu/drm/drm_edid.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -1769,7 +1769,8 @@ int drm_add_edid_modes(struct drm_connec
num_modes += add_cvt_modes(connector, edid);
num_modes += add_standard_modes(connector, edid);
num_modes += add_established_modes(connector, edid);
- num_modes += add_inferred_modes(connector, edid);
+ if (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF)
+ num_modes += add_inferred_modes(connector, edid);
num_modes += add_cea_modes(connector, edid);
if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
Patches currently in stable-queue which might be from paulo.r.zan...@intel.com
are
queue-3.4/drm-don-t-add-inferred-modes-for-monitors-that-don-t-support-them.patch
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