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| author | Alex Deucher <alexdeucher@gmail.com> | 2010-07-20 11:27:54 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-02 10:29:38 -0700 |
| commit | f48b1a82b488358a1a12567bda6e55112a15f3f8 (patch) | |
| tree | 740622ec2bf254a23c807927d3b720437fd15fe7 /lib/string_helpers.c | |
| parent | 4552415cf7db742e0063b8f4826a1352b62fe1fa (diff) | |
drm/radeon/kms: fix shared ddc harder
commit 42f14c4b454946650cf0bf66e0b631d02e328f61 upstream.
This fixes a regression caused by b2ea4aa67bfd084834edd070e0a4a47857d6db59
due to the way shared ddc with multiple digital connectors was handled.
You generally have two cases where DDC lines are shared:
- HDMI + VGA
- HDMI + DVI-D
HDMI + VGA is easy to deal with because you can check the EDID for the
to see if the attached monitor is digital. A shared DDC line with two
digital connectors is more complex. You can't use the hdmi bits in the
EDID since they may not be there with DVI<->HDMI adapters. In this case
all we can do is check the HPD pins to see which is connected as we have
no way of knowing using the EDID.
Reported-by: trapdoor6@gmail.com
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'lib/string_helpers.c')
0 files changed, 0 insertions, 0 deletions