diff options
Diffstat (limited to 'src/ec/google/chromeec/ec.c')
| -rw-r--r-- | src/ec/google/chromeec/ec.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/src/ec/google/chromeec/ec.c b/src/ec/google/chromeec/ec.c index 28625e4096..efe22e2ab9 100644 --- a/src/ec/google/chromeec/ec.c +++ b/src/ec/google/chromeec/ec.c @@ -986,25 +986,32 @@ int google_chromeec_pd_get_amode(uint16_t svid) return 0; } -const static long wait_for_display_timeout_ms = 2000; #define USB_SID_DISPLAYPORT 0xff01 -void google_chromeec_wait_for_display(void) +/** + * Wait for DisplayPort to be ready + * + * @param timeout Wait aborts after <timeout> ms. + * @return 1: Success or 0: Timeout. + */ +int google_chromeec_wait_for_displayport(long timeout) { struct stopwatch sw; - printk(BIOS_INFO, "Waiting for display\n"); - stopwatch_init_msecs_expire(&sw, wait_for_display_timeout_ms); + printk(BIOS_INFO, "Waiting for DisplayPort\n"); + stopwatch_init_msecs_expire(&sw, timeout); while (google_chromeec_pd_get_amode(USB_SID_DISPLAYPORT) != 1) { if (stopwatch_expired(&sw)) { printk(BIOS_WARNING, - "Display not ready after %ldms. Abort.\n", - wait_for_display_timeout_ms); - return; + "DisplayPort not ready after %ldms. Abort.\n", + timeout); + return 0; } mdelay(200); } - printk(BIOS_INFO, "Display ready after %lu ms\n", + printk(BIOS_INFO, "DisplayPort ready after %lu ms\n", stopwatch_duration_msecs(&sw)); + + return 1; } |