drm/i915: check the DDC and AUX bits of the VBT on DDI machines

Browse source

Our code currently assumes that port X will use the DP AUX channel X
and the DDC pin X. The VBT should tell us how things are mapped, so
add some WARNs in case we discover our assumptions are wrong (or in
case the VBT is just wrong, which is also perfectly possible).

Why would someone wire port B to AUX C and DDC D?

v2: Rebase
v3: Convert WARNs to DRM_DEBUG_KMS

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com> (v1)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

...

This commit is contained in:

Paulo Zanoni 2013-09-12 17:07:55 -03:00 • committed by Daniel Vetter

parent 6acab15a7b

commit 6bf19e7c54

1 changed files with 27 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

27

drivers/gpu/drm/i915/intel_bios.c

View file