[S] Change in coreboot[main]: drivers/wifi: Support Radio Frequency Interference Mitigation

[Felix Held (Code Review)]

Felix Held has submitted this change. ( https://review.coreboot.org/c/coreboot/+/83431?usp=email )

Change subject: drivers/wifi: Support Radio Frequency Interference Mitigation
......................................................................

drivers/wifi: Support Radio Frequency Interference Mitigation

The 'Radio Frequency Interference Mitigation' DSM function 11
provides the desired status of the RFI mitigation.

The implementation follows document 559910 Intel Connectivity
Platforms BIOS Guideline revision 8.3 specification.

BUG=b:352768410
TEST=ACPI DSM Function 11 reflects the value of the SAR binary

Change-Id: I02808b0ce6a0a380845612e774e326c698ad1adc
Signed-off-by: Jeremy Compostella 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83431
Tested-by: build bot (Jenkins) 
Reviewed-by: YH Lin 
Reviewed-by: Subrata Banik 
---
M src/drivers/wifi/generic/acpi.c
M src/include/sar.h
2 files changed, 22 insertions(+), 1 deletion(-)

Approvals:
  Subrata Banik: Looks good to me, approved
  build bot (Jenkins): Verified
  YH Lin: Looks good to me, but someone else must approve

diff --git a/src/drivers/wifi/generic/acpi.c b/src/drivers/wifi/generic/acpi.c
index 946962c2..81620f7 100644
--- a/src/drivers/wifi/generic/acpi.c
+++ b/src/drivers/wifi/generic/acpi.c
@@ -212,6 +212,26 @@
 }

/*
+ * Function 11: RFI mitigation
+ * Bit 0:
+ * 0 - DLVR RFIm enabled (default)
+ * 1 - DLVR RFIm disabled
+ *
+ * Bit 1:
+ * 0 - DDR RFIm enabled (default)
+ * 1 - DDR RFIm disabled
+ *
+ * Bits 2-31: Reserved - Should be 0
+ */
+
+static void wifi_dsm_rfi_mitigation(void *args)
+{
+	struct dsm_profile *dsm_config = (struct dsm_profile *)args;
+
+	acpigen_write_return_integer(dsm_config->rfi_mitigation);
+}
+
+/*
  * Function 12: Control Enablement 802.11be on certificated modules
  * Bit 0
  * 0 - 11BE disabled for China Mainland
@@ -251,7 +271,7 @@
    NULL,					/* Function 8 */
    NULL,					/* Function 9 */
    wifi_dsm_energy_detection_threshold,	/* Function 10 */
-	NULL,					/* Function 11 */
+	wifi_dsm_rfi_mitigation,		/* Function 11 */
    wifi_dsm_11be_country_enablement,	/* Function 12 */
 };

diff --git a/src/include/sar.h b/src/include/sar.h
index c8e9d41..b0274b5 100644
--- a/src/include/sar.h
+++ b/src/include/sar.h
@@ -61,6 +61,7 @@
    uint32_t unii_4;
    uint32_t enablement_11be;
    uint32_t energy_detection_threshold;
+	uint32_t rfi_mitigation;
 };

struct bsar_profile {