]> git.ipfire.org Git - thirdparty/linux.git/commit
usb: typec: ucsi: Pass full DP config payload in SET_NEW_CAM for DP alt mode
authorMadhu M <madhu.m@intel.com>
Fri, 19 Jun 2026 15:33:11 +0000 (21:03 +0530)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 8 Jul 2026 11:28:54 +0000 (13:28 +0200)
commit735a461d060d4eeb2f9732aba1295bc32a3982e2
tree27d42d7769cf16b93f3bf75daad4164992f1ca08
parent07acd41f72eec827963b239565925af2bcb3a54b
usb: typec: ucsi: Pass full DP config payload in SET_NEW_CAM for DP alt mode

In the UCSI Specification Revision 3.1 RC1, bits 32-63 of the SET_NEW_CAM
command hold the 32-bit Alternate Mode Specific (AMSpecific) field.

For DisplayPort Alternate Mode, this field must contain the full
32-bit DisplayPort configuration VDO payload that the OPM wants the
connector to operate in, rather than just the pin assignment value.
This AMSpecific value follows the DisplayPort Configurations defined
in the DisplayPort Alt Mode on USB Type-C Specification v2.1a,
Table 5-13: SOP DisplayPort Configurations.

Fixes: af8622f6a585 ("usb: typec: ucsi: Support for DisplayPort alt mode")
Cc: stable <stable@kernel.org>
Signed-off-by: Madhu M <madhu.m@intel.com>
Reviewed-by: Jameson Thies <jthies@google.com>
Reviewed-by: Andrei Kuchynski <akuchynski@chromium.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://patch.msgid.link/20260619153311.3526083-1-madhu.m@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/typec/ucsi/displayport.c