[coreboot-gerrit] Change in coreboot[master]: soc/intel/tigerlake: Add Acoustic features

[Shaunak Saha (Code Review)]

Shaunak Saha has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/45052 )

Change subject: soc/intel/tigerlake: Add Acoustic features
......................................................................

soc/intel/tigerlake: Add Acoustic features

Expose the following FSP UPD interface into coreboot, which is the
following:
AcousticNoiseMitigation
FastPkgCRampDisable
SlowSlewRateFor
AcousticNoiseMitigation is the UPD for Acoustic Noise Mitigation.
FastPkgCRampDisable UPD's are to disable Fast Slew Rate for Deep Package
C States for VR domains.
SlowSlewRate UPD's are the Slew Rate configuration for Deep Package C
States for VR domains. Slew rates are fast time divided by 2.

BUG=b:153015585
BRANCH=none
TEST= Measure the change in noise level by changing the UPD values.

Signed-off-by: Shaunak Saha 
Change-Id: I1924a3bac8beb16a9d841891696f9a3dea0d425f
---
M src/soc/intel/tigerlake/chip.h
M src/soc/intel/tigerlake/fsp_params.c
2 files changed, 36 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/52/45052/1

diff --git a/src/soc/intel/tigerlake/chip.h b/src/soc/intel/tigerlake/chip.h
index 2da63ed..8d2483e 100644
--- a/src/soc/intel/tigerlake/chip.h
+++ b/src/soc/intel/tigerlake/chip.h
@@ -145,6 +145,35 @@
    /* Wake Enable Bitmap for USB3 ports */
    uint16_t usb3_wake_enable_bitmap;

+	/*
+	 * Acoustic Noise Mitigation
+	 * 0 - Disable
+	 * 1 - Enable noise mitigation
+	 */
+	uint8_t AcousticNoiseMitigation;
+
+	/*
+	 * Offset 0x054B - Disable Fast Slew Rate for Deep Package
+	 * C States for VR domains. Disable Fast Slew Rate for Deep
+	 * Package C States based on Acoustic Noise Mitigation feature
+	 * enabled.
+	 * 0 - False
+	 * 1 - True
+	 */
+	uint8_t FastPkgCRampDisable[5];
+
+	/*
+	 * Offset 0x0550 - Slew Rate configuration for Deep Package
+	 * C States for VR domains. Slew Rate configuration for Deep
+	 * Package C States for VR domains based on Acoustic Noise
+	 * Mitigation feature enabled.
+	 * 0 - Fast/2
+	 * 1 - Fast/4
+	 * 2 - Fast/8
+	 * 3 - Fast/16
+	 */
+	uint8_t	SlowSlewRate[5];
+
    /* SATA related */
    uint8_t SataEnable;
    uint8_t SataMode;
diff --git a/src/soc/intel/tigerlake/fsp_params.c b/src/soc/intel/tigerlake/fsp_params.c
index 1601c2c..39baa67 100644
--- a/src/soc/intel/tigerlake/fsp_params.c
+++ b/src/soc/intel/tigerlake/fsp_params.c
@@ -247,6 +247,13 @@
    	}
    }

+	params->AcousticNoiseMitigation = config->AcousticNoiseMitigation;
+	for (i = 0; i < ARRAY_SIZE(config->SlowSlewRate); i++)
+		params->SlowSlewRate[i] = config->SlowSlewRate[i];
+
+	for (i = 0; i < ARRAY_SIZE(config->FastPkgCRampDisable); i++)
+		params->FastPkgCRampDisable[i] = config->FastPkgCRampDisable[i];
+
    /* Enable TCPU for processor thermal control */
    params->Device4Enable = config->Device4Enable;