grunt: Check DP MF-bit against selected pin cfg
When we are configuring a Type-C port for DisplayPort alternate mode, we
should check to see that the selected pin config supports multi-function
mode or not. This commit fixes a bug where we were setting the
SuperSpeed muxes based solely upon the Multi-function Preferred bit in
the DPStatus VDO. Some Type-C video adapters are buggy and set the MF
preferred bit without actually supporting an MF pin configuration.
Therefore, we trust the reported supported pin configurations in the
DiscMode VDO.
BUG=chromium:919756
BRANCH=grunt
TEST=DP still works with dock and DP-only dongles.
Change-Id: I3df2b67f29aaf2c725bba30a45bb902bdc44fcf4
Signed-off-by: Edward Hill <ecgh@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1530128
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
1 file changed
