Change in coreboot[master]: skylake, kabylake: Add support to set eMMC tuning param from dev tree

[Duncan Laurie (Code Review)]

Duncan Laurie has submitted this change and it was merged. ( https://review.coreboot.org/28274 )

Change subject: skylake,kabylake: Add support to set eMMC tuning param from dev tree
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skylake,kabylake: Add support to set eMMC tuning param from dev tree

Add support to set eMMC tuning params from the device tree so that it
can be configured per board.

BUG=b:112718426,b:112690628
BRANCH=none
TEST=Build nocturne image and checked values passed in dev tree is set
by FSP.

Change-Id: Ic71934dce9a1c380a057e579ca3fda41983b9385
Signed-off-by: Pratik Prajapati 
Reviewed-on: https://review.coreboot.org/28274
Tested-by: build bot (Jenkins) 
Reviewed-by: Lijian Zhao 
Reviewed-by: Philipp Deppenwiese 
Reviewed-by: Nick Vaccaro 
---
M src/soc/intel/skylake/chip.h
M src/soc/intel/skylake/chip_fsp20.c
2 files changed, 12 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Philipp Deppenwiese: Looks good to me, but someone else must approve
  Lijian Zhao: Looks good to me, but someone else must approve
  Nick Vaccaro: Looks good to me, approved

diff --git a/src/soc/intel/skylake/chip.h b/src/soc/intel/skylake/chip.h
index 5bf3931..b1ffcb2 100644
--- a/src/soc/intel/skylake/chip.h
+++ b/src/soc/intel/skylake/chip.h
@@ -291,6 +291,9 @@
    u8 ScsEmmcEnabled;
    u8 ScsEmmcHs400Enabled;
    u8 ScsSdCardEnabled;
+	u8 EmmcHs400DllNeed;
+	u8 ScsEmmcHs400RxStrobeDll1;
+	u8 ScsEmmcHs400TxDataDll;

u8 PttSwitch;
    u8 HeciTimeouts;
diff --git a/src/soc/intel/skylake/chip_fsp20.c b/src/soc/intel/skylake/chip_fsp20.c
index d5f5433..c2c0745 100644
--- a/src/soc/intel/skylake/chip_fsp20.c
+++ b/src/soc/intel/skylake/chip_fsp20.c
@@ -336,6 +336,15 @@
    params->ScsEmmcHs400Enabled = config->ScsEmmcHs400Enabled;
    params->ScsSdCardEnabled = config->ScsSdCardEnabled;

+	if (!!params->ScsEmmcHs400Enabled && !!config->EmmcHs400DllNeed) {
+		params->PchScsEmmcHs400DllDataValid =
+			!!config->EmmcHs400DllNeed;
+		params->PchScsEmmcHs400RxStrobeDll1 =
+			config->ScsEmmcHs400RxStrobeDll1;
+		params->PchScsEmmcHs400TxDataDll =
+			config->ScsEmmcHs400TxDataDll;
+	}
+
    /* If ISH is enabled, enable ISH elements */
    dev = dev_find_slot(0, PCH_DEVFN_ISH);
    if (dev)