Change in coreboot[master]: drivers/wwan/fm: Include option to add ACPI _DSD for DmaProperty

[Felix Held (Code Review)]

Felix Held has submitted this change. ( https://review.coreboot.org/c/coreboot/+/62436 )

Change subject: drivers/wwan/fm: Include option to add ACPI _DSD for DmaProperty
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drivers/wwan/fm: Include option to add ACPI _DSD for DmaProperty

Similar to commit 09c047c, the WWAN device might be considered an
untrusted device by some platforms, therefore add an option to add the
same `DmaProperty` to the WWAN _DSD.

BUG=b:215424986
BRANCH=brya
TEST=dump SSDT, see new property

Signed-off-by: Tim Wawrzynczak 
Change-Id: If485ac5314fae6e6faefac43fcfcea4f4cdd02c0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62436
Tested-by: build bot (Jenkins) 
Reviewed-by: EricR Lai 
---
M src/drivers/wwan/fm/acpi_fm350gl.c
M src/drivers/wwan/fm/chip.h
2 files changed, 12 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  EricR Lai: Looks good to me, approved

diff --git a/src/drivers/wwan/fm/acpi_fm350gl.c b/src/drivers/wwan/fm/acpi_fm350gl.c
index 80370ad..dbc4f24 100644
--- a/src/drivers/wwan/fm/acpi_fm350gl.c
+++ b/src/drivers/wwan/fm/acpi_fm350gl.c
@@ -241,6 +241,14 @@
    		wwan_fm350gl_acpi_method_shrf(parent, config);
    		wwan_fm350gl_acpi_method_rst(parent, config);
    		wwan_fm350gl_acpi_method_dpts(parent, config);
+
+			if (config->add_acpi_dma_property) {
+				struct acpi_dp *dsd;
+				dsd = acpi_dp_new_table("_DSD");
+				acpi_dp_add_integer(dsd, "DmaProperty", 1);
+				acpi_dp_write(dsd);
+			}
+
    		/* NOTE: the 5G driver will call MRST._RST to trigger a cold reset
    		 * during firmware update.
    		 */
@@ -249,6 +257,7 @@
    			acpigen_write_ADR(0);
    			wwan_fm350gl_acpi_method_mrst_rst(parent, config);
    		}
+
    		acpigen_write_device_end(); /* Device */
    	}
    	acpigen_write_device_end(); /* Device */
diff --git a/src/drivers/wwan/fm/chip.h b/src/drivers/wwan/fm/chip.h
index 635178b..19bc4c9 100644
--- a/src/drivers/wwan/fm/chip.h
+++ b/src/drivers/wwan/fm/chip.h
@@ -20,6 +20,9 @@

/* Pointer to the corresponding RTD3 */
    DEVTREE_CONST struct device *rtd3dev;
+
+	/* Add `DmaProperty` in _DSD */
+	bool add_acpi_dma_property;
 };

#endif /* __DRIVERS_WWAN_FM_CHIP_H__ */