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usb: typec: Add Displayport Alternate Mode 2.1 Support

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Displayport Alternate mode 2.1 requires configuration for additional
cable details such as signalling for cable, UHBR13.5 Support, Cable type
and DPAM version.
These details can be used with mux drivers to configure SOP DP
configuration for Displayport Alternate mode 2.1.
This change also includes pertinent cable signalling support in displayport
alternate mode.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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/20230920023243.2494410-2-utkarsh.h.patel@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Utkarsh Patel 2023-09-19 19:32:39 -07:00 committed by Greg Kroah-Hartman
parent bb00788bd6
commit a17fae8fc3
4 changed files with 31 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/usb/typec/altmodes/displayport.c
View File

@ -86,8 +86,11 @@ static int dp_altmode_notify(struct dp_altmode *dp)
static int dp_altmode_configure(struct dp_altmode *dp, u8 con)
{
u32 conf = DP_CONF_SIGNALING_DP; /* Only DP signaling supported */
u8 pin_assign = 0;
u32 conf;
/* DP Signalling */
conf = (dp->data.conf & DP_CONF_SIGNALLING_MASK) >> DP_CONF_SIGNALLING_SHIFT;
switch (con) {
case DP_STATUS_CON_DISABLED:

2
drivers/usb/typec/ucsi/displayport.c
View File

@ -315,7 +315,7 @@ struct typec_altmode *ucsi_register_displayport(struct ucsi_connector *con,
struct ucsi_dp *dp;
/* We can't rely on the firmware with the capabilities. */
desc->vdo |= DP_CAP_DP_SIGNALING | DP_CAP_RECEPTACLE;
desc->vdo |= DP_CAP_DP_SIGNALLING(0) | DP_CAP_RECEPTACLE;
/* Claiming that we support all pin assignments */
desc->vdo |= all_assignments << 8;

4
drivers/usb/typec/ucsi/ucsi_ccg.c
View File

@ -501,8 +501,8 @@ static void ucsi_ccg_nvidia_altmode(struct ucsi_ccg *uc,
case NVIDIA_FTB_DP_OFFSET:
if (alt[0].mid == USB_TYPEC_NVIDIA_VLINK_DBG_VDO)
alt[0].mid = USB_TYPEC_NVIDIA_VLINK_DP_VDO |
DP_CAP_DP_SIGNALING | DP_CAP_USB |
DP_CONF_SET_PIN_ASSIGN(BIT(DP_PIN_ASSIGN_E));
DP_CAP_DP_SIGNALLING(0) | DP_CAP_USB |
DP_CONF_SET_PIN_ASSIGN(BIT(DP_PIN_ASSIGN_E));
break;
case NVIDIA_FTB_DBG_OFFSET:
if (alt[0].mid == USB_TYPEC_NVIDIA_VLINK_DP_VDO)

28
include/linux/usb/typec_dp.h
View File

@ -67,8 +67,10 @@ enum {
#define DP_CAP_UFP_D 1
#define DP_CAP_DFP_D 2
#define DP_CAP_DFP_D_AND_UFP_D 3
#define DP_CAP_DP_SIGNALING BIT(2) /* Always set */
#define DP_CAP_GEN2 BIT(3) /* Reserved after v1.0b */
#define DP_CAP_DP_SIGNALLING(_cap_) (((_cap_) & GENMASK(5, 2)) >> 2)
#define DP_CAP_SIGNALLING_HBR3 1
#define DP_CAP_SIGNALLING_UHBR10 2
#define DP_CAP_SIGNALLING_UHBR20 3
#define DP_CAP_RECEPTACLE BIT(6)
#define DP_CAP_USB BIT(7)
#define DP_CAP_DFP_D_PIN_ASSIGN(_cap_) (((_cap_) & GENMASK(15, 8)) >> 8)
@ -78,6 +80,13 @@ enum {
DP_CAP_UFP_D_PIN_ASSIGN(_cap_) : DP_CAP_DFP_D_PIN_ASSIGN(_cap_))
#define DP_CAP_PIN_ASSIGN_DFP_D(_cap_) ((_cap_ & DP_CAP_RECEPTACLE) ? \
DP_CAP_DFP_D_PIN_ASSIGN(_cap_) : DP_CAP_UFP_D_PIN_ASSIGN(_cap_))
#define DP_CAP_UHBR_13_5_SUPPORT BIT(26)
#define DP_CAP_CABLE_TYPE(_cap_) (((_cap_) & GENMASK(29, 28)) >> 28)
#define DP_CAP_CABLE_TYPE_PASSIVE 0
#define DP_CAP_CABLE_TYPE_RE_TIMER 1
#define DP_CAP_CABLE_TYPE_RE_DRIVER 2
#define DP_CAP_CABLE_TYPE_OPTICAL 3
#define DP_CAP_DPAM_VERSION BIT(30)
/* DisplayPort Status Update VDO bits */
#define DP_STATUS_CONNECTION(_status_) ((_status_) & 3)
@ -97,13 +106,24 @@ enum {
#define DP_CONF_CURRENTLY(_conf_) ((_conf_) & 3)
#define DP_CONF_UFP_U_AS_DFP_D BIT(0)
#define DP_CONF_UFP_U_AS_UFP_D BIT(1)
#define DP_CONF_SIGNALING_DP BIT(2)
#define DP_CONF_SIGNALING_GEN_2 BIT(3) /* Reserved after v1.0b */
#define DP_CONF_SIGNALLING_MASK GENMASK(5, 2)
#define DP_CONF_SIGNALLING_SHIFT 2
#define DP_CONF_SIGNALLING_HBR3 1
#define DP_CONF_SIGNALLING_UHBR10 2
#define DP_CONF_SIGNALLING_UHBR20 3
#define DP_CONF_PIN_ASSIGNEMENT_SHIFT 8
#define DP_CONF_PIN_ASSIGNEMENT_MASK GENMASK(15, 8)
/* Helper for setting/getting the pin assignment value to the configuration */
#define DP_CONF_SET_PIN_ASSIGN(_a_) ((_a_) << 8)
#define DP_CONF_GET_PIN_ASSIGN(_conf_) (((_conf_) & GENMASK(15, 8)) >> 8)
#define DP_CONF_UHBR13_5_SUPPORT BIT(26)
#define DP_CONF_CABLE_TYPE_MASK GENMASK(29, 28)
#define DP_CONF_CABLE_TYPE_SHIFT 28
#define DP_CONF_CABLE_TYPE_PASSIVE 0
#define DP_CONF_CABLE_TYPE_RE_TIMER 1
#define DP_CONF_CABLE_TYPE_RE_DRIVER 2
#define DP_CONF_CABLE_TYPE_OPTICAL 3
#define DP_CONF_DPAM_VERSION BIT(30)
#endif /* __USB_TYPEC_DP_H */