Change in coreboot[master]: soc/intel/skylake: [WIP] Add config for mbx command for Intersil VR C...

[Rizwan Qureshi (Code Review)]

Rizwan Qureshi has uploaded this change for review. ( https://review.coreboot.org/21680

Change subject: soc/intel/skylake: [WIP] Add config for mbx command for Intersil VR C-state issues
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soc/intel/skylake: [WIP] Add config for mbx command for Intersil VR C-state issues

Config for activating VR mailbox command for Intersil VR C-state issues.
0 - no mailbox command sent.
1 - VR mailbox command sent for IA/GT rails only.
2 - VR mailbox command sent for IA/GT/SA rails.

Change-Id: Ibcced31b7ba473ffa7368c90c945d07a81a368d4
Signed-off-by: Rizwan Qureshi 
---
M src/soc/intel/skylake/chip.h
M src/soc/intel/skylake/chip_fsp20.c
2 files changed, 16 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/80/21680/1

diff --git a/src/soc/intel/skylake/chip.h b/src/soc/intel/skylake/chip.h
index 606078b..8c6e45a 100644
--- a/src/soc/intel/skylake/chip.h
+++ b/src/soc/intel/skylake/chip.h
@@ -518,6 +518,14 @@
    	/* coreboot handles locking */
    	CHIPSET_LOCKDOWN_COREBOOT,
    } chipset_lockdown;
+
+	/*
+	 * Activates VR mailbox command for Intersil VR C-state issues.
+	 * 0 - no mailbox command sent.
+	 * 1 - VR mailbox command sent for IA/GT rails only.
+	 * 2 - VR mailbox command sent for IA/GT/SA rails.
+	 */
+	u8 IslVrCmd;
 };

typedef struct soc_intel_skylake_config config_t;
diff --git a/src/soc/intel/skylake/chip_fsp20.c b/src/soc/intel/skylake/chip_fsp20.c
index b1697ae..ac60125 100644
--- a/src/soc/intel/skylake/chip_fsp20.c
+++ b/src/soc/intel/skylake/chip_fsp20.c
@@ -271,6 +271,14 @@
     */
    params->SendVrMbxCmd1 = config->SendVrMbxCmd;

+	/*
+	 * Activates VR mailbox command for Intersil VR C-state issues.
+	 * 0 - no mailbox command sent.
+	 * 1 - VR mailbox command sent for IA/GT rails only.
+	 * 2 - VR mailbox command sent for IA/GT/SA rails.
+	 */
+	params->IslVrCmd = config->IslVrCmd;
+
    /* Acoustic Noise Mitigation */
    params->AcousticNoiseMitigation = config->AcousticNoiseMitigation;
    params->SlowSlewRateForIa = config->SlowSlewRateForIa;