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ec/google/chromeec: Update some PD and DisplayPort APIs 

1. Update google_chromeec_pd_get_amode() to return bitmask.
2. Update google_chromeec_wait_for_displayport() to handle the
   updated return value of google_chromeec_pd_get_amode().
3. Drop google_chromeec_pd_get_amode() from ec.h and make it static
   because it's not used outside of ec.c.

BUG=b:192947843

Signed-off-by: Derek Huang <derek.huang@intel.corp-partner.google.com>
Change-Id: I6020c4305e30018d4c97d862c16e8d642c951765
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58058
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
This commit is contained in:
Derek Huang 2021-09-29 17:38:31 +08:00 committed by Tim Wawrzynczak
parent f1f9b3d5f5
commit c0f005a5d6
2 changed files with 29 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
src/ec/google/chromeec/ec.c
View File

@ -1542,9 +1542,10 @@ int google_chromeec_usb_get_pd_mux_info(int port, uint8_t *flags)
* Check if EC/TCPM is in an alternate mode or not.
*
* @param svid SVID of the alternate mode to check
* @return 0: Not in the mode. -1: Error. 1: Yes.
* @return 0: Not in the mode. -1: Error.
* >=1: bitmask of the ports that are in the mode.
*/
int google_chromeec_pd_get_amode(uint16_t svid)
static int google_chromeec_pd_get_amode(uint16_t svid)
{
struct ec_response_usb_pd_ports resp;
struct chromeec_command cmd = {
@ -1557,6 +1558,7 @@ int google_chromeec_pd_get_amode(uint16_t svid)
.cmd_dev_index = 0,
};
int i;
int ret = 0;
if (google_chromeec_command(&cmd) < 0)
return -1;
@ -1582,12 +1584,12 @@ int google_chromeec_pd_get_amode(uint16_t svid)
if (google_chromeec_command(&cmd) < 0)
return -1;
if (resp2.svid == svid)
return 1;
ret |= BIT(i);
svid_idx++;
} while (resp2.svid);
}
return 0;
return ret;
}
#define USB_SID_DISPLAYPORT 0xff01
@ -1595,20 +1597,31 @@ int google_chromeec_pd_get_amode(uint16_t svid)
/**
* Wait for DisplayPort to be ready
*
* @param timeout Wait aborts after <timeout> ms.
* @return 1: Success or 0: Timeout.
* @param timeout_ms Wait aborts after <timeout_ms> ms.
* @return -1: Error. 0: Timeout.
* >=1: Bitmask of the ports that DP device is connected
*/
int google_chromeec_wait_for_displayport(long timeout)
int google_chromeec_wait_for_displayport(long timeout_ms)
{
struct stopwatch sw;
int ret = 0;
printk(BIOS_INFO, "Waiting for DisplayPort\n");
stopwatch_init_msecs_expire(&sw, timeout);
while (google_chromeec_pd_get_amode(USB_SID_DISPLAYPORT) != 1) {
stopwatch_init_msecs_expire(&sw, timeout_ms);
while (1) {
ret = google_chromeec_pd_get_amode(USB_SID_DISPLAYPORT);
if (ret > 0)
break;
if (ret < 0) {
printk(BIOS_ERR, "Can't get alternate mode!\n");
return ret;
}
if (stopwatch_expired(&sw)) {
printk(BIOS_WARNING,
"DisplayPort not ready after %ldms. Abort.\n",
timeout);
timeout_ms);
return 0;
}
mdelay(200);
@ -1616,7 +1629,7 @@ int google_chromeec_wait_for_displayport(long timeout)
printk(BIOS_INFO, "DisplayPort ready after %lu ms\n",
stopwatch_duration_msecs(&sw));
return 1;
return ret;
}
int google_chromeec_get_keybd_config(struct ec_response_keybd_config *keybd)

7
src/ec/google/chromeec/ec.h
View File

@ -26,7 +26,6 @@ bool google_chromeec_is_uhepi_supported(void);
int google_ec_running_ro(void);
enum ec_image google_chromeec_get_current_image(void);
void google_chromeec_init(void);
int google_chromeec_pd_get_amode(uint16_t svid);
/* Check for the current mux state in EC
* in: int port physical port number of the type-c port
* out: uint8_t flags representing the status of the mux such as
@ -36,7 +35,11 @@ int google_chromeec_usb_get_pd_mux_info(int port, uint8_t *flags);
/* Returns data role and type of device connected */
int google_chromeec_usb_pd_get_info(int port, bool *ufp, bool *dbg_acc,
bool *active_cable, uint8_t *dp_mode);
int google_chromeec_wait_for_displayport(long timeout);
/* Poll (up to `timeout_ms` ms) for DisplayPort to be ready
* Return: -1: Error. 0: Timeout.
* >=1: Bitmask of the ports that DP device is connected
*/
int google_chromeec_wait_for_displayport(long timeout_ms);
/* Device events */
uint64_t google_chromeec_get_device_enabled_events(void);