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| author | udaykiran <udaykiran@google.com> | 2021-06-02 12:12:57 -0700 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2021-07-02 23:33:01 +0000 |
| commit | 65b8e9a2a37b91c47e22151c9438b121d7b02558 (patch) | |
| tree | fc489fe4af468e4d7b261a6b4425a94579e42f91 /board/oak | |
| parent | f281dad60e108a5d9d0b6047b4a649af67afaa09 (diff) | |
| download | chrome-ec-65b8e9a2a37b91c47e22151c9438b121d7b02558.tar.gz | |
DP Altmode DFP: Add `mfallow` command
The USB Type-C Altmode allows for protocols other than USB to be
transferred over a USB connection. Chromebooks use this functionality to
transfer DisplayPort on USB signals. This is achieved through USB-PD
handshake through SVDMs to discover, configure, and to enter or exit Alt
modes. When DisplayPort as an Alt Mode is enabled, allowable
functionalities are:
-- SS and high speed USB functionality and two-lane DP.
-- HS USB functionality and 4-lane DP.
Chromebooks honor Multifunction bit set in the DPStatus message sent by
a dock. However, for development purposes we would like to have control
to honor the MF bit or ignore it, there by achieving 2-lane DP vs 4-lane
DP functionality. 4-lane DP functionality is required to test higher
resolution monitors such as 4k60.
BUG=b:181365633
BRANCH=none
TEST=make BOARD, tested on G5 dock with kindred.
Signed-off-by: udaykiran <udaykiran@google.com>
Change-Id: Icc25f339a78d1423b094d2acf9d586721ec2df46
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2939383
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
Diffstat (limited to 'board/oak')
| -rw-r--r-- | board/oak/board.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/board/oak/board.h b/board/oak/board.h index 6e33390d0b..abd3403f63 100644 --- a/board/oak/board.h +++ b/board/oak/board.h @@ -129,6 +129,7 @@ /* Optional features */ #define CONFIG_CMD_HOSTCMD +#undef CONFIG_CMD_MFALLOW /* Drivers */ /* USB Mux */ |