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authorVinod Polimera <vpolimer@codeaurora.org>2020-09-21 08:55:16 +0530
committerJulius Werner <jwerner@chromium.org>2020-10-09 22:03:35 +0000
commitb9a7d779b3cb48bb784d0856b6bb5f3fc6b4c1f7 (patch)
tree60e660db73d247be698ad68d94113e2a2ef2e19e /src/arch/arm/armv4/Makefile.inc
parent3c667a2e7d97bd0acd15a28e762bb793b5fa5d62 (diff)
sc7180: Remove the delay to force hpd detection and always disable HPD
HPD on this bridge chip is a bit useless. This is an eDP bridge so the HPD is an internal signal that's only there to signal that the panel is done powering up. But the bridge chip debounces this signal by between 100 ms and 400 ms (depending on process, voltage, and temperate). One particular panel asserted HPD 84 ms after it was powered on meaning that we saw HPD 284 ms after power on. Assume that the panel driver will have the hardcoded delay in its prepare and always disable HPD. Change-Id: Iea7dd75b57fa55ec182c0bee09b0f35208357892 Signed-off-by: Vinod Polimera <vpolimer@codeaurora.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/45706 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org>
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