Change in coreboot[master]: soc/mediatek/mt8195: initialize DFD

[Hung-Te Lin (Code Review)]

Hung-Te Lin has submitted this change. ( https://review.coreboot.org/c/coreboot/+/57980 )

Change subject: soc/mediatek/mt8195: initialize DFD
......................................................................

soc/mediatek/mt8195: initialize DFD

DFD (Design for Debug) is a debugging tool, which scans
flip-flops and dumps to internal RAM on the WDT reset.
After system reboots, those values could be showed for
debugging.

BUG=b:192429713

Signed-off-by: Rex-BC Chen 
Change-Id: Ied63913db94b2e52ab394a66c70f7edfd507c99b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57980
Reviewed-by: Rex-BC Chen 
Reviewed-by: Hung-Te Lin 
Reviewed-by: Yu-Ping Wu 
Tested-by: build bot (Jenkins) 
---
M src/soc/mediatek/mt8195/Makefile.inc
A src/soc/mediatek/mt8195/include/soc/dfd.h
M src/soc/mediatek/mt8195/soc.c
3 files changed, 25 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Hung-Te Lin: Looks good to me, but someone else must approve
  Yu-Ping Wu: Looks good to me, approved
  Rex-BC Chen: Looks good to me, but someone else must approve

diff --git a/src/soc/mediatek/mt8195/Makefile.inc b/src/soc/mediatek/mt8195/Makefile.inc
index d15d476..6540ce2 100644
--- a/src/soc/mediatek/mt8195/Makefile.inc
+++ b/src/soc/mediatek/mt8195/Makefile.inc
@@ -52,6 +52,7 @@
 ramstage-y += ../common/auxadc.c
 ramstage-y += ../common/ddp.c ddp.c
 ramstage-y += devapc.c
+ramstage-y += ../common/dfd.c
 ramstage-y += ../common/dpm.c
 ramstage-$(CONFIG_DPM_FOUR_CHANNEL) += dpm_4ch.c
 ramstage-y += dp_intf.c dptx.c dptx_hal.c
diff --git a/src/soc/mediatek/mt8195/include/soc/dfd.h b/src/soc/mediatek/mt8195/include/soc/dfd.h
new file mode 100644
index 0000000..123b568
--- /dev/null
+++ b/src/soc/mediatek/mt8195/include/soc/dfd.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef SOC_MEDIATEK_MT8195_DFD_H
+#define SOC_MEDIATEK_MT8195_DFD_H
+
+#include <soc/dfd_common.h>
+
+/* DFD dump address and size need to be the same as defined in Kernel DTS. */
+#define DFD_DUMP_ADDRESS	0x6A000000
+#define DFD_DUMP_SIZE		(1 * MiB)
+
+#endif
diff --git a/src/soc/mediatek/mt8195/soc.c b/src/soc/mediatek/mt8195/soc.c
index 6380564..3991964 100644
--- a/src/soc/mediatek/mt8195/soc.c
+++ b/src/soc/mediatek/mt8195/soc.c
@@ -1,7 +1,9 @@
 /* SPDX-License-Identifier: GPL-2.0-only */

+#include <bootmem.h>
 #include <device/device.h>
 #include <soc/devapc.h>
+#include <soc/dfd.h>
 #include <soc/emi.h>
 #include <soc/hdmi.h>
 #include <soc/mcupm.h>
@@ -10,6 +12,12 @@
 #include <soc/ufs.h>
 #include <symbols.h>

+void bootmem_platform_add_ranges(void)
+{
+	if (CONFIG(MTK_DFD))
+		bootmem_add_range(DFD_DUMP_ADDRESS, DFD_DUMP_SIZE, BM_MEM_RESERVED);
+}
+
 static void soc_read_resources(struct device *dev)
 {
    ram_resource(dev, 0, (uintptr_t)_dram / KiB, sdram_size() / KiB);
@@ -21,6 +29,10 @@
    dapc_init();
    mcupm_init();
    sspm_init();
+
+	if (CONFIG(MTK_DFD))
+		dfd_init();
+
    ufs_disable_refclk();
    hdmi_low_power_setting();
 }