soc/intel/alderlake: Add support to update descriptor at runtime
On nereid, we need to update the descriptor based on fw_config (see
the follow-up patch), so add support to update the descriptor at
runtime. This is a temporary workaround while we find a better solution.
This is basically adding back the configure_pmc_descriptor() function
removed in CB:63339, just making it generic and allowing it to update
multiple bytes at once.
BUG=b:226848617
TEST=With the following patch, Type-C and HDMI work on nereid.
Change-Id: I43c4d2888706561e42ff6b8ce0377eedbc38dbfe
Signed-off-by: Reka Norman <rekanorman@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63365
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Sam McNally <sammc@google.com>
diff --git a/src/soc/intel/alderlake/Kconfig b/src/soc/intel/alderlake/Kconfig
index b2f90f8..d3c52944 100644
--- a/src/soc/intel/alderlake/Kconfig
+++ b/src/soc/intel/alderlake/Kconfig
@@ -112,6 +112,13 @@
select UDK_202005_BINDING
select USE_FSP_NOTIFY_PHASE_POST_PCI_ENUM
+config ALDERLAKE_CONFIGURE_DESCRIPTOR
+ bool
+ help
+ Select this if the descriptor needs to be updated at runtime. This
+ can only be done if the descriptor region is writable, and should only
+ be used as a temporary workaround.
+
config ALDERLAKE_CAR_ENHANCED_NEM
bool
default y if !INTEL_CAR_NEM