[XS] Change in coreboot[master]: mb/google/rex/var/screebo: Prevent camera LED blinking during boot

[Jason Z Chen (Code Review)]

Jason Z Chen has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/79767?usp=email )

Change subject: mb/google/rex/var/screebo: Prevent camera LED blinking during boot
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mb/google/rex/var/screebo: Prevent camera LED blinking during boot

Configure _DSC to ACPI_DEVICE_SLEEP_D3_COLD so that driver skips
initial probe during kernel boot, preventing privacy LED blink.

BUG=b:317434358
TEST=none

Change-Id: I43044e64c2c3a645ec0cad2ac903cc19ac89c9af
---
M src/mainboard/google/rex/variants/screebo/overridetree.cb
1 file changed, 1 insertion(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/67/79767/1

diff --git a/src/mainboard/google/rex/variants/screebo/overridetree.cb b/src/mainboard/google/rex/variants/screebo/overridetree.cb
index 83366ae..a3ab01c 100644
--- a/src/mainboard/google/rex/variants/screebo/overridetree.cb
+++ b/src/mainboard/google/rex/variants/screebo/overridetree.cb
@@ -514,6 +514,7 @@
    			register "num_freq_entries" = "1"
    			register "link_freq[0]" = "400 * MHz"
    			register "remote_name" = ""IPU0""
+				register "max_dstate_for_probe" = "ACPI_DEVICE_SLEEP_D3_COLD"

register "has_power_resource" = "1"
    			#Controls