diff options
| author | Prashant Malani <pmalani@chromium.org> | 2020-04-28 22:44:28 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-05 13:06:46 +0200 |
| commit | 7990be48ef4d87163940d6c04c349c93f0bd9ae7 (patch) | |
| tree | 33826d1a4361b209e26e2af0a66a7af9d36b353f /drivers | |
| parent | 2bef9aed6f0e22391c8d4570749b1acc9bc3981e (diff) | |
| download | linux-7990be48ef4d87163940d6c04c349c93f0bd9ae7.tar.bz2 | |
usb: typec: mux: intel: Handle alt mode HPD_HIGH
According to the PMC Type C Subsystem (TCSS) Mux programming guide rev
0.6, when a device is transitioning to DP Alternate Mode state, if the
HPD_STATE (bit 7) field in the status update command VDO is set to
HPD_HIGH, the HPD_HIGH field in the Alternate Mode request “mode_data”
field (bit 14) should also be set. Ensure the bit is correctly handled
while issuing the Alternate Mode request.
Signed-off-by: Prashant Malani <pmalani@chromium.org>
Fixes: 6701adfa9693 ("usb: typec: driver for Intel PMC mux control")
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20200429054432.134178-1-pmalani@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/typec/mux/intel_pmc_mux.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/typec/mux/intel_pmc_mux.c b/drivers/usb/typec/mux/intel_pmc_mux.c index bb23886c1768..67c5139cfa0d 100644 --- a/drivers/usb/typec/mux/intel_pmc_mux.c +++ b/drivers/usb/typec/mux/intel_pmc_mux.c @@ -157,6 +157,10 @@ pmc_usb_mux_dp(struct pmc_usb_port *port, struct typec_mux_state *state) req.mode_data |= (state->mode - TYPEC_STATE_MODAL) << PMC_USB_ALTMODE_DP_MODE_SHIFT; + if (data->status & DP_STATUS_HPD_STATE) + req.mode_data |= PMC_USB_DP_HPD_LVL << + PMC_USB_ALTMODE_DP_MODE_SHIFT; + return pmc_usb_command(port, (void *)&req, sizeof(req)); } |