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usb: typec: ucsi_ccg: workaround for NVIDIA test device

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NVIDIA VirtualLink (svid 0x955) has two altmode, vdo=0x1 for
VirtualLink DP mode and vdo=0x3 for NVIDIA test mode. NVIDIA
test device FTB (Function Test Board) reports altmode list with
vdo=0x3 first and then vdo=0x1. The list is:
 SVID   VDO
0xff01  0xc05
0x28de  0x8085
0x955   0x3
0x955   0x1

Current logic to assign mode value is based on order
in altmode list. This causes a mismatch of CON and SOP altmodes
since NVIDIA GPU connector has order of vdo=0x1 first and then
vdo=0x3. Fixing this by changing the order of vdo values
reported by NVIDIA test device. the new list will be:

 SVID   VDO
0xff01  0xc05
0x28de  0x8085
0x955   0x1085
0x955   0x3

Also NVIDIA VirtualLink (svid 0x955) uses pin E for display mode.
NVIDIA test device reports vdo of 0x1 so make sure vdo values
always have pin E assignement.

Signed-off-by: Ajay Gupta <ajayg@nvidia.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20200310121912.57879-1-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ajay Gupta 2020-03-10 15:19:12 +03:00 committed by Greg Kroah-Hartman
parent 0de005d0e4
commit 706f4bbf18
2 changed files with 52 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/usb/typec/ucsi/ucsi.h
View File

@ -119,12 +119,14 @@ void ucsi_connector_change(struct ucsi *ucsi, u8 num);
#define UCSI_SET_PDR_ACCEPT_ROLE_SWAPS BIT(25)
/* GET_ALTERNATE_MODES command bits */
#define UCSI_ALTMODE_RECIPIENT(_r_) (((_r_) >> 16) & 0x7)
#define UCSI_GET_ALTMODE_RECIPIENT(_r_) ((u64)(_r_) << 16)
#define UCSI_RECIPIENT_CON 0
#define UCSI_RECIPIENT_SOP 1
#define UCSI_RECIPIENT_SOP_P 2
#define UCSI_RECIPIENT_SOP_PP 3
#define UCSI_GET_ALTMODE_CONNECTOR_NUMBER(_r_) ((u64)(_r_) << 24)
#define UCSI_ALTMODE_OFFSET(_r_) (((_r_) >> 32) & 0xff)
#define UCSI_GET_ALTMODE_OFFSET(_r_) ((u64)(_r_) << 32)
#define UCSI_GET_ALTMODE_NUM_ALTMODES(_r_) ((u64)(_r_) << 40)

55
drivers/usb/typec/ucsi/ucsi_ccg.c
View File

@ -125,6 +125,10 @@ struct version_format {
#define CCG_FW_BUILD_NVIDIA (('n' << 8) | 'v')
#define CCG_OLD_FW_VERSION (CCG_VERSION(0x31) | CCG_VERSION_PATCH(10))
/* Altmode offset for NVIDIA Function Test Board (FTB) */
#define NVIDIA_FTB_DP_OFFSET (2)
#define NVIDIA_FTB_DBG_OFFSET (3)
struct version_info {
struct version_format base;
struct version_format app;
@ -477,24 +481,65 @@ static void ucsi_ccg_update_set_new_cam_cmd(struct ucsi_ccg *uc,
*cmd |= UCSI_SET_NEW_CAM_SET_AM(cam);
}
/*
* Change the order of vdo values of NVIDIA test device FTB
* (Function Test Board) which reports altmode list with vdo=0x3
* first and then vdo=0x. Current logic to assign mode value is
* based on order in altmode list and it causes a mismatch of CON
* and SOP altmodes since NVIDIA GPU connector has order of vdo=0x1
* first and then vdo=0x3
*/
static void ucsi_ccg_nvidia_altmode(struct ucsi_ccg *uc,
struct ucsi_altmode *alt)
{
switch (UCSI_ALTMODE_OFFSET(uc->last_cmd_sent)) {
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));
break;
case NVIDIA_FTB_DBG_OFFSET:
if (alt[0].mid == USB_TYPEC_NVIDIA_VLINK_DP_VDO)
alt[0].mid = USB_TYPEC_NVIDIA_VLINK_DBG_VDO;
break;
default:
break;
}
}
static int ucsi_ccg_read(struct ucsi *ucsi, unsigned int offset,
void *val, size_t val_len)
{
struct ucsi_ccg *uc = ucsi_get_drvdata(ucsi);
int ret;
u16 reg = CCGX_RAB_UCSI_DATA_BLOCK(offset);
struct ucsi_altmode *alt;
int ret;
ret = ccg_read(uc, reg, val, val_len);
if (ret)
return ret;
if (offset == UCSI_MESSAGE_IN) {
if (UCSI_COMMAND(uc->last_cmd_sent) == UCSI_GET_CURRENT_CAM &&
uc->has_multiple_dp) {
if (offset != UCSI_MESSAGE_IN)
return ret;
switch (UCSI_COMMAND(uc->last_cmd_sent)) {
case UCSI_GET_CURRENT_CAM:
if (uc->has_multiple_dp)
ucsi_ccg_update_get_current_cam_cmd(uc, (u8 *)val);
break;
case UCSI_GET_ALTERNATE_MODES:
if (UCSI_ALTMODE_RECIPIENT(uc->last_cmd_sent) ==
UCSI_RECIPIENT_SOP) {
alt = val;
if (alt[0].svid == USB_TYPEC_NVIDIA_VLINK_SID)
ucsi_ccg_nvidia_altmode(uc, alt);
}
uc->last_cmd_sent = 0;
break;
default:
break;
}
uc->last_cmd_sent = 0;
return ret;
}