[XS] Change in coreboot[main]: soc/amd/phoenix: Disable CCP DMA in PSP Verstage

[Karthik Ramasubramanian (Code Review)]

Attention is currently required from: Felix Held, Fred Reitberger, Jason Glenesk, Matt DeVillier.

Karthik Ramasubramanian has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/78234?usp=email )

Change subject: soc/amd/phoenix: Disable CCP DMA in PSP Verstage
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soc/amd/phoenix: Disable CCP DMA in PSP Verstage

Some stalls are observed while using CCP DMA in PSP verstage -
especially with CBFS verification enabled. Also with RW CBFS
verification enabled, the entire firmware body is not loaded during
verstage for verification. Instead the files are verified as and when
they are loaded from CBFS. Hence the impact to boot time is reduced
since only few files are loaded during PSP verstage. Hence disable CCP
DMA in PSP verstage until the root cause is identified.

BUG=None
TEST=Build and boot to OS in Myst with CBFS verification enabled.

Change-Id: I22ac108b08abcfe432dfd175644393e384888e11
Signed-off-by: Karthikeyan Ramasubramanian 
---
M src/soc/amd/phoenix/Kconfig
1 file changed, 2 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/34/78234/1

diff --git a/src/soc/amd/phoenix/Kconfig b/src/soc/amd/phoenix/Kconfig
index ec1a9e9..c9aa32c 100644
--- a/src/soc/amd/phoenix/Kconfig
+++ b/src/soc/amd/phoenix/Kconfig
@@ -25,7 +25,8 @@
    select PLATFORM_USES_FSP2_0
    select PROVIDES_ROM_SHARING
    select PSP_SUPPORTS_EFS2_RELATIVE_ADDR if VBOOT_STARTS_BEFORE_BOOTBLOCK
-	select PSP_VERSTAGE_CCP_DMA if VBOOT_STARTS_BEFORE_BOOTBLOCK
+	# TODO: (b/303516266) Re-enable CCP DMA after addressing a stall
+	# select PSP_VERSTAGE_CCP_DMA if VBOOT_STARTS_BEFORE_BOOTBLOCK
    select RESET_VECTOR_IN_RAM
    select RTC
    select SOC_AMD_COMMON