drm: don't add inferred modes for monitors that don't support them
authorPaulo Zanoni <paulo.r.zanoni@intel.com>
Fri, 15 Feb 2013 15:36:27 +0000 (13:36 -0200)
committerDave Airlie <airlied@redhat.com>
Tue, 19 Feb 2013 22:44:22 +0000 (08:44 +1000)
commit196e077dc165a307efbd9e7569f81bbdbcf18f65
tree167eba82b3f1711012d6706199ac91fd1080e081
parent8fcb6c4748822f8f594536e47b9b0701b6c33e7a
drm: don't add inferred modes for monitors that don't support them

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)".

Cc: stable@vger.kernel.org
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=45729
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
drivers/gpu/drm/drm_edid.c