diff options
| author | Kenneth Chan <kenneth.chan@quanta.corp-partner.google.com> | 2023-10-18 09:19:02 +0800 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2023-10-23 13:01:28 +0000 |
| commit | 961cb4f04fb6d393ed124cb094ce873b6fa671c2 (patch) | |
| tree | 7bb9d09f9eb7ba27b42aa11fa84fe04134315cf4 /src/mainboard/google | |
| parent | 0360aea50062cbf0a7c3d42f2f6e6f7a7672ebf9 (diff) | |
mb/google/dedede: Add HPD GPIOs on dexi variant
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.
BUG=b:303533815
BRANCH=dedede
TEST=On dexi, 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: Ib4fc071cac98a542072ffbeb6943bff4c988554c
Signed-off-by: Kenneth Chan <kenneth.chan@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78450
Reviewed-by: Sheng-Liang Pan <sheng-liang.pan@quanta.corp-partner.google.com>
Reviewed-by: Ren Kuo <ren.kuo@quanta.corp-partner.google.com>
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: David Wu <david_wu@quanta.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/mainboard/google')
| -rw-r--r-- | src/mainboard/google/dedede/variants/dexi/gpio.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/mainboard/google/dedede/variants/dexi/gpio.c b/src/mainboard/google/dedede/variants/dexi/gpio.c index 89a7a77feb..2998592756 100644 --- a/src/mainboard/google/dedede/variants/dexi/gpio.c +++ b/src/mainboard/google/dedede/variants/dexi/gpio.c @@ -91,3 +91,18 @@ const struct pad_config *variant_override_gpio_table(size_t *num) *num = ARRAY_SIZE(gpio_table); return gpio_table; } + +static const gpio_t hpd_gpios[] = { + /* HDMI1 */ + GPP_A17, + /* HDMI2 */ + GPP_A16, + /* USB C0 */ + GPP_B23, +}; + +const gpio_t *variant_hpd_gpios(size_t *num) +{ + *num = ARRAY_SIZE(hpd_gpios); + return hpd_gpios; +} |