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 b40c600914 ("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>
961cb4f04f