nocturne: 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=firmware-nocturne-10984.B
TEST=Flash nocturne, plug in Insignia NS-PU369CH-WH USB-C to HDMI
adapter, verify that 4k60 display is shown.
TEST=Plug in Belkin dock which supports SuperSpeed ports, verify that
SuperSpeed ports work and display is shown at 4k30.
Change-Id: I9febb007edc5392a6172e4709482981dbcbdc8b7
Signed-off-by: Aseda Aboagye <aaboagye@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/1404136
Tested-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
Commit-Queue: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1530127
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Edward Hill <ecgh@chromium.org>
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
1 file changed
