drm/i915: Fall back to bit banging mode for DVO transmitter detection
authorDavid Müller (ELSOFT AG) <d.mueller@elsoft.ch>
Fri, 19 Apr 2013 08:41:50 +0000 (10:41 +0200)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Fri, 19 Apr 2013 14:31:41 +0000 (16:31 +0200)
commite4bfff54ed3f5de88f5358504c78c2cb037813aa
tree6bf2a5a4ff56b5c3b693b649659a110b86c431bc
parentbd080ee57c2173cefdcadc39c7863a76c249d049
drm/i915: Fall back to bit banging mode for DVO transmitter detection

As discussed in this thread
http://lists.freedesktop.org/archives/dri-devel/2013-April/037411.html
GMBUS based DVO transmitter detection seems to be unreliable which could
result in an unusable DVO port.

The attached patch fixes this by falling back to bit banging mode for
the time DVO transmitter detection is in progress.

Signed-off-by: David Müller <d.mueller@elsoft.ch>
Tested-by: David Müller <d.mueller@elsoft.ch>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/intel_dvo.c