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| author | Reka Norman <rekanorman@chromium.org> | 2023-10-09 10:57:17 +1100 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2023-10-10 13:39:01 +0000 |
| commit | e486082dfb1658b0916915bc944c1d3266862423 (patch) | |
| tree | 0cb92fe72b554455884c8ed5df46e34ccd5574b5 /src/mainboard/google/dedede/variants/baseboard/include/baseboard/variants.h | |
| parent | 7c193b9480eaa0692b4d68ed768262ff34ae35e6 (diff) | |
| download | coreboot-e486082dfb1658b0916915bc944c1d3266862423.tar.gz coreboot-e486082dfb1658b0916915bc944c1d3266862423.tar.bz2 coreboot-e486082dfb1658b0916915bc944c1d3266862423.zip | |
mb/google/dedede: Wait for HPD on dibbi variants
Some Type-C monitors do not immediately assert HPD. If we enter FSP-S
before HDP is asserted, display initialisation may fail. So wait for
HPD.
This is similar to commit b40c6009141e ("mainboard/hatch: Fix puff DP
output on cold boots") on puff, except we don't use
google_chromeec_wait_for_displayport() since that EC command was removed
for TCPMv2 (https://crrev.com/c/4221975). Instead we use the HPD signals
only. By waiting for any HPD signal (Type-C or HDMI), we skip waiting if
HDMI is connected, which is the same behaviour as puff and fizz.
TEST=On dibbi, connect a display via a Type-C to HDMI dongle and check
the dev and recovery screens are now displayed correctly. Also check the
logs in the following cases:
Cold reboot in dev mode, Type-C to HDMI dongle:
HPD ready after 800 ms
Warm reboot in dev mode, Type-C to HDMI dongle:
HPD ready after 0 ms
Cold/warm reboot in dev mode, direct Type-C:
HPD ready after 0 ms
Cold/warm reboot in dev mode, direct HDMI:
HPD ready after 0 ms
Cold/warm reboot in dev mode, no display:
HPD not ready after 3000 ms. Abort.
Change-Id: Id4657b5d5a95a68ecbd9efcf3585cf96ad1e13e1
Signed-off-by: Reka Norman <rekanorman@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78294
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Sam McNally <sammc@google.com>
Diffstat (limited to 'src/mainboard/google/dedede/variants/baseboard/include/baseboard/variants.h')
| -rw-r--r-- | src/mainboard/google/dedede/variants/baseboard/include/baseboard/variants.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/mainboard/google/dedede/variants/baseboard/include/baseboard/variants.h b/src/mainboard/google/dedede/variants/baseboard/include/baseboard/variants.h index b258481fbb4f..bb9fd5d97d2b 100644 --- a/src/mainboard/google/dedede/variants/baseboard/include/baseboard/variants.h +++ b/src/mainboard/google/dedede/variants/baseboard/include/baseboard/variants.h @@ -15,6 +15,7 @@ const struct pad_config *variant_early_gpio_table(size_t *num); const struct pad_config *variant_sleep_gpio_table(size_t *num); const struct pad_config *variant_override_gpio_table(size_t *num); const struct pad_config *variant_romstage_gpio_table(size_t *num); +const gpio_t *variant_hpd_gpios(size_t *num); enum s0ix_entry { S0IX_EXIT, |