Change in coreboot[master]: mainboard/google/brya/variants/brask: Enable audio driver in bios-sta...

[Adam Liu (Code Review)]

Adam Liu has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/59610 )

Change subject: mainboard/google/brya/variants/brask: Enable audio driver in bios-stage for brask
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mainboard/google/brya/variants/brask: Enable audio driver in bios-stage for brask

Probe audio driver and set audio GPIO for audio driver

TEST=
BUG=

Signed-off-by: Adam Liu 
Change-Id: I05c5d734ab9cd9a894084398decb5e3bac45ddf2
---
A src/mainboard/google/brya/variants/brask/fw_config.c
M src/mainboard/google/brya/variants/brask/overridetree.cb
2 files changed, 62 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/10/59610/1

diff --git a/src/mainboard/google/brya/variants/brask/fw_config.c b/src/mainboard/google/brya/variants/brask/fw_config.c
new file mode 100644
index 0000000..1d684d4
--- /dev/null
+++ b/src/mainboard/google/brya/variants/brask/fw_config.c
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <bootstate.h>
+#include <console/console.h>
+#include <fw_config.h>
+#include <gpio.h>
+
+static const struct pad_config dmic_enable_pads[] = {
+	PAD_CFG_NF(GPP_R4, NONE, DEEP, NF3),	/* DMIC_CLK0_R */
+	PAD_CFG_NF(GPP_R5, NONE, DEEP, NF3),	/* DMIC_DATA0_R */
+	PAD_CFG_NF(GPP_R6, NONE, DEEP, NF3),	/* DMIC_CLK1_R */
+	PAD_CFG_NF(GPP_R7, NONE, DEEP, NF3),	/* DMIC_DATA1_R */
+};
+
+static const struct pad_config dmic_disable_pads[] = {
+	PAD_NC(GPP_R4, NONE),
+	PAD_NC(GPP_R5, NONE),
+	PAD_NC(GPP_R6, NONE),
+	PAD_NC(GPP_R7, NONE),
+};
+
+static const struct pad_config i2s_enable_pads[] = {
+	PAD_CFG_NF(GPP_R0, NONE, DEEP, NF2),	/* I2S_HP_SCLK_R */
+	PAD_CFG_NF(GPP_R1, NONE, DEEP, NF2),	/* I2S_HP_SFRM_R */
+	PAD_CFG_NF(GPP_R2, DN_20K, DEEP, NF2),	/* I2S_PCH_TX_HP_RX_STRAP */
+	PAD_CFG_NF(GPP_R3, NONE, DEEP, NF2),	/* I2S_PCH_RX_HP_TX */
+};
+
+static const struct pad_config i2s_disable_pads[] = {
+	PAD_NC(GPP_R0, NONE),
+	PAD_NC(GPP_R1, NONE),
+	PAD_NC(GPP_R2, NONE),
+	PAD_NC(GPP_R3, NONE),
+};
+
+static void fw_config_handle(void *unused)
+{
+	if (!fw_config_is_provisioned() || fw_config_probe(FW_CONFIG(AUDIO, AUDIO_UNKNOWN))) {
+		printk(BIOS_INFO, "Disable audio related GPIO pins.\n");
+		gpio_configure_pads(i2s_disable_pads, ARRAY_SIZE(i2s_disable_pads));
+		gpio_configure_pads(dmic_disable_pads, ARRAY_SIZE(dmic_disable_pads));
+		return;
+	}
+
+	if (fw_config_probe(FW_CONFIG(AUDIO, MAX98373_NAU88L25B_I2S))) {
+		printk(BIOS_INFO, "Configure audio over I2S with MAX98373 NAU88L25B.\n");
+		gpio_configure_pads(dmic_enable_pads, ARRAY_SIZE(dmic_enable_pads));
+		gpio_configure_pads(i2s_enable_pads, ARRAY_SIZE(i2s_enable_pads));
+	}
+}
+
+BOOT_STATE_INIT_ENTRY(BS_DEV_ENABLE, BS_ON_ENTRY, fw_config_handle, NULL);
diff --git a/src/mainboard/google/brya/variants/brask/overridetree.cb b/src/mainboard/google/brya/variants/brask/overridetree.cb
index 3805666..1d7b791 100644
--- a/src/mainboard/google/brya/variants/brask/overridetree.cb
+++ b/src/mainboard/google/brya/variants/brask/overridetree.cb
@@ -1,3 +1,10 @@
+fw_config
+	field AUDIO 1 3
+		option AUDIO_UNKNOWN	0
+		option NAU88L25B_I2S	1
+	end
+end
+
 chip soc/intel/alderlake
    device domain 0 on
    	device ref dtt on
@@ -127,7 +134,9 @@
    			register "short_key_debounce" = "2"   # 100ms
    			register "jack_insert_debounce" = "7" # 512ms
    			register "jack_eject_debounce" = "7"  # 512ms
-				device i2c 1a on end
+				device i2c 1a on
+				  probe AUDIO NAU88L25B_I2S
+				end
    		end
    	end
    	device ref pcie_rp8 on