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ec/google/chromeec: Skip unnecessary call to TCSS `enter_dp_mode` cmd 

Skip TCSS `enter_dp_mode` command when there is no USB device detected
on the port.

BUG=b:247670186
TEST=Verify display over TCSS and its impact on boot time for
google/rex

Signed-off-by: Kapil Porwal <kapilporwal@google.com>
Change-Id: Ie6cd84cab3631596d4d7178dae2040e25c621f63
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76352
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
This commit is contained in:
Kapil Porwal 2023-07-10 11:27:17 +00:00 committed by Subrata Banik
parent ba7fee9159
commit c2c5801dcd
1 changed files with 7 additions and 0 deletions
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7
src/ec/google/chromeec/ec.c
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@ -1213,9 +1213,16 @@ static int google_chromeec_usb_pd_get_info(int port, bool *ufp, bool *dbg_acc,
int google_chromeec_typec_control_enter_dp_mode(int port)
{
int ret;
struct usbc_mux_info mux_info;
if (!google_chromeec_check_feature(EC_FEATURE_TYPEC_REQUIRE_AP_MODE_ENTRY))
return 0;
ret = google_chromeec_get_usbc_mux_info(port, &mux_info);
if ((ret < 0) || (!mux_info.usb))
return -1;
const struct ec_params_typec_control typec_control = {
.port = port,
.command = TYPEC_CONTROL_COMMAND_ENTER_MODE,