[S] Change in coreboot[main]: [TEST ONLY]mb/google/nissa/var/glassway: Tune eMMC DLL values

[Daniel Peng (Code Review)]

Daniel Peng has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/80779?usp=email )

Change subject: [TEST ONLY]mb/google/nissa/var/glassway: Tune eMMC DLL values
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[TEST ONLY]mb/google/nissa/var/glassway: Tune eMMC DLL values

Update eMMC DLL values to improve initialization reliability.

BUG=b:319071869
TEST=Cold reboot stress test over 2500 cycles

Change-Id: Ice9ee217acf7dc6e3e704bc82529e0b9a8faf184
Signed-off-by: Daniel Peng 
---
M src/mainboard/google/brya/variants/glassway/overridetree.cb
1 file changed, 45 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/79/80779/1

diff --git a/src/mainboard/google/brya/variants/glassway/overridetree.cb b/src/mainboard/google/brya/variants/glassway/overridetree.cb
index ddeff20..e1c9f26 100644
--- a/src/mainboard/google/brya/variants/glassway/overridetree.cb
+++ b/src/mainboard/google/brya/variants/glassway/overridetree.cb
@@ -23,6 +23,51 @@
 chip soc/intel/alderlake
    register "sagv" = "SaGv_Enabled"

+	# EMMC Tx CMD Delay
+	# Refer to EDS-Vol2-42.3.7.
+	# [14:8] steps of delay for DDR mode, each 125ps, range: 0 - 39.
+	# [6:0] steps of delay for SDR mode, each 125ps, range: 0 - 39.
+	register "common_soc_config.emmc_dll.emmc_tx_cmd_cntl" = "0x505"
+
+	# EMMC TX DATA Delay 1
+	# Refer to EDS-Vol2-42.3.8.
+	# [14:8] steps of delay for HS400, each 125ps, range: 0 - 78.
+	# [6:0] steps of delay for SDR104/HS200, each 125ps, range: 0 - 79.
+	register "common_soc_config.emmc_dll.emmc_tx_data_cntl1" = "0x909"
+
+	# EMMC TX DATA Delay 2
+	# Refer to EDS-Vol2-42.3.9.
+	# [30:24] steps of delay for SDR50, each 125ps, range: 0 - 79.
+	# [22:16] steps of delay for DDR50, each 125ps, range: 0 - 78.
+	# [14:8] steps of delay for SDR25/HS50, each 125ps, range: 0 -79.
+	# [6:0] steps of delay for SDR12, each 125ps. Range: 0 - 79.
+	register "common_soc_config.emmc_dll.emmc_tx_data_cntl2" = "0x1C2A2828"
+
+	# EMMC RX CMD/DATA Delay 1
+	# Refer to EDS-Vol2-42.3.10.
+	# [30:24] steps of delay for SDR50, each 125ps, range: 0 - 119.
+	# [22:16] steps of delay for DDR50, each 125ps, range: 0 - 78.
+	# [14:8] steps of delay for SDR25/HS50, each 125ps, range: 0 - 119.
+	# [6:0] steps of delay for SDR12, each 125ps, range: 0 - 119.
+	register "common_soc_config.emmc_dll.emmc_rx_cmd_data_cntl1" = "0x1C1B4F1B"
+
+	# EMMC RX CMD/DATA Delay 2
+	# Refer to EDS-Vol2-42.3.12.
+	# [17:16] stands for Rx Clock before Output Buffer,
+	#         00: Rx clock after output buffer,
+	#         01: Rx clock before output buffer,
+	#         10: Automatic selection based on working mode.
+	#         11: Reserved
+	# [14:8] steps of delay for Auto Tuning Mode, each 125ps, range: 0 - 39.
+	# [6:0] steps of delay for HS200, each 125ps, range: 0 - 79.
+	register "common_soc_config.emmc_dll.emmc_rx_cmd_data_cntl2" = "0x10051"
+
+	# EMMC Rx Strobe Delay
+	# Refer to EDS-Vol2-42.3.11.
+	# [14:8] Rx Strobe Delay DLL 1(HS400 Mode), each 125ps, range: 0 - 39.
+	# [6:0] Rx Strobe Delay DLL 2(HS400 Mode), each 125ps, range: 0 - 39.
+	register "common_soc_config.emmc_dll.emmc_rx_strobe_cntl" = "0x01515"
+
    # SOC Aux orientation override:
    # This is a bitfield that corresponds to up to 4 TCSS ports.
    # Bits (0,1) allocated for TCSS Port1 configuration and Bits (2,3)for TCSS Port2.