raspi/linux
1
0
Fork 1
mirror of https://github.com/raspberrypi/linux.git synced 2026-01-02 15:53:42 +00:00
Code Issues Projects Releases Wiki Activity

platform/chrome: cros_ec_typec: Set Pin Assignment E in DP PORT VDO

Browse Source 
[ Upstream commit a9635ef0ca ]

Pin C and D are used on C-to-C cable applications including docks,
and for USB-C adapters that convert from DP over USB-C to other
video standards.

Pin Assignment E is intended to be used with adapter from USB-C to DP
plugs or receptacles.

All Chromebook USB-C DFPs support DisplayPort Alternate Mode as the DP
Source with support for all 3 pin assignments. Pin Assignment E is required
in order to support if the user attaches a Pin E C-to-DP cable.

Without this, the displayport.c alt mode driver will error out of
dp_altmode_probe with an -ENODEV, as it cannot find a compatible matching
pin assignment between the DFP_D and UFP_D.

Fixes: dbb3fc0ffa ("platform/chrome: cros_ec_typec: Displayport support")

Signed-off-by: Benson Leung <bleung@chromium.org>
Reviewed-by: Jameson Thies <jthies@google.com>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Link: https://lore.kernel.org/r/20250428174828.13939-1-bleung@chromium.org
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Benson Leung
2025-04-28 17:48:28 +00:00
committed by Greg Kroah-Hartman
parent 7f16be2b29
commit c080514715
1 changed files with 4 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/platform/chrome/cros_ec_typec.c
View File

@@ -22,8 +22,10 @@
#define DRV_NAME "cros-ec-typec"
#define DP_PORT_VDO (DP_CONF_SET_PIN_ASSIGN(BIT(DP_PIN_ASSIGN_C) | BIT(DP_PIN_ASSIGN_D)) | \
DP_CAP_DFP_D | DP_CAP_RECEPTACLE)
#define DP_PORT_VDO (DP_CAP_DFP_D | DP_CAP_RECEPTACLE | \
DP_CONF_SET_PIN_ASSIGN(BIT(DP_PIN_ASSIGN_C) | \
BIT(DP_PIN_ASSIGN_D) | \
BIT(DP_PIN_ASSIGN_E)))
static void cros_typec_role_switch_quirk(struct fwnode_handle *fwnode)
{