diff options
| author | Keith Short <keithshort@chromium.org> | 2020-06-25 14:56:28 -0600 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2020-07-01 23:21:16 +0000 |
| commit | e8bd3c057ceb1c881ccd5112b577d94cd730b7d6 (patch) | |
| tree | 615a5ead4a1577e875fce7022132d2af0cc945d9 /driver/usb_mux | |
| parent | 0891b0f1d64c440fbb79f4c1beaf974e65b9c6f6 (diff) | |
| download | chrome-ec-e8bd3c057ceb1c881ccd5112b577d94cd730b7d6.tar.gz | |
bb_retimer: add power up timing
Ensure the Burnside Bridge is held in reset when the AP is off and add a
delay to reset de-assertion to meet Burnside Bridge requirements.
BUG=b:159743964
BRANCH=none
TEST=make buildall
TEST=Verify BB initialization is skipped when the AP is off (verified
with extra debug)
TEST=Verify operation of USB, DP, and USB4 devices on Burnside bridge.
Signed-off-by: Keith Short <keithshort@chromium.org>
Change-Id: I4a4f05aaf84bf93b3c3032998bc811591c8fbf35
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2271697
Reviewed-by: Abe Levkoy <alevkoy@chromium.org>
Diffstat (limited to 'driver/usb_mux')
| -rw-r--r-- | driver/usb_mux/usb_mux.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/driver/usb_mux/usb_mux.c b/driver/usb_mux/usb_mux.c index 911558905d..cfc91352bc 100644 --- a/driver/usb_mux/usb_mux.c +++ b/driver/usb_mux/usb_mux.c @@ -149,16 +149,24 @@ static inline void exit_low_power_mode(int port) void usb_mux_init(int port) { + int rv; + ASSERT(port >= 0 && port < CONFIG_USB_PD_PORT_MAX_COUNT); if (port >= board_get_usb_pd_port_count()) { return; } - configure_mux(port, USB_MUX_INIT, NULL); + rv = configure_mux(port, USB_MUX_INIT, NULL); - /* Device is always out of LPM after initialization. */ - flags[port] &= ~USB_MUX_FLAG_IN_LPM; + /* + * Mux may fail initialization if it's not powered. Mark this port + * as in LPM mode to try initialization again. + */ + if (rv == EC_ERROR_NOT_POWERED) + flags[port] |= USB_MUX_FLAG_IN_LPM; + else + flags[port] &= ~USB_MUX_FLAG_IN_LPM; } /* |