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usb: typec: intel_pmc_mux: Configure cable generation value for USB4

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USB4 specification chapter 3 indicates that cable data rates have to be
rounded for USB4 device to operate as USB4.
With that configure cable generation value to use rounded data rates for
USB4.

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Utkarsh Patel <utkarsh.h.patel@intel.com>
Link: https://lore.kernel.org/r/20201209042408.23079-2-utkarsh.h.patel@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Utkarsh Patel 2020-12-08 20:24:08 -08:00 committed by Greg Kroah-Hartman
parent d2a968dddf
commit beff5de94f
1 changed files with 5 additions and 0 deletions
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5
drivers/usb/typec/mux/intel_pmc_mux.c
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@ -327,6 +327,11 @@ pmc_usb_mux_usb4(struct pmc_usb_port *port, struct typec_mux_state *state)
fallthrough;
default:
req.mode_data |= PMC_USB_ALTMODE_ACTIVE_CABLE;
/* Configure data rate to rounded in the case of Active TBT3
* and USB4 cables.
*/
req.mode_data |= PMC_USB_ALTMODE_TBT_GEN(1);
break;
}