mb/google/zork: Switch to using newly added i2s_machine_dev driver

This change switches zork devices to use the newly added
i2s_machine_dev driver in devicetree rather than passing
dmic_select_gpio in SoC config.

BUG=b:157708581

Change-Id: I76c633694cbfb454c081ab2a4af4765bfbbae16b
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43543
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/mainboard/google/zork/Kconfig

@@ -14,6 +14,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select SOC_AMD_PICASSO
 	select VGA_BIOS
 	select BOARD_ROMSIZE_KB_16384
+	select DRIVERS_AMD_I2S_MACHINE_DEV
 	select DISABLE_SPI_FLASH_ROM_SHARING
 	select DRIVERS_GENERIC_GPIO_KEYS
 	select DRIVERS_I2C_GENERIC

src/mainboard/google/zork/variants/baseboard/devicetree_dalboz.cb

@@ -17,16 +17,6 @@ chip soc/amd/picasso
 	register "acp_i2s_wake_enable" = "1"
 	register "acpi_pme_enable" = "1"
 
-	# DMIC select GPIO for ACP machine device
-	# This GPIO is used to select DMIC0 or DMIC1 by the kernel driver. It does not
-	# really have a polarity since low and high control the selection of DMIC and
-	# hence does not have an active polarity.
-	# Kernel driver does not use the polarity field and instead treats the GPIO
-	# selection as follows:
-	# Set low (0) = Select DMIC0
-	# Set high (1) = Select DMIC1
-	register "dmic_select_gpio" = "ACPI_GPIO_OUTPUT(GPIO_67)"
-
 	# Start : OPN Performance Configuration
 	# (Configuratin that is common for all variants)
 	# For the below fields, 0 indicates use SOC default
@@ -273,7 +263,22 @@ chip soc/amd/picasso
 					end
 				end
 			end
-			device pci 0.5 on  end # Audio
+			device pci 0.5 on
+				chip drivers/amd/i2s_machine_dev
+					register "hid" = ""AMDI5682""
+					# DMIC select GPIO for ACP machine device
+					# This GPIO is used to select DMIC0 or DMIC1 by the
+					# kernel driver. It does not really have a polarity
+					# since low and high control the selection of DMIC and
+					# hence does not have an active polarity.
+					# Kernel driver does not use the polarity field and
+					# instead treats the GPIO selection as follows:
+					# Set low (0) = Select DMIC0
+					# Set high (1) = Select DMIC1
+					register "dmic_select_gpio" = "ACPI_GPIO_OUTPUT(GPIO_67)"
+					device generic 0.0 on end
+				end
+			end # Audio
 			device pci 0.6 on  end # HDA
 			device pci 0.7 on  end # non-Sensor Fusion Hub device
 		end

src/mainboard/google/zork/variants/baseboard/devicetree_trembyle.cb

@@ -17,16 +17,6 @@ chip soc/amd/picasso
 	register "acp_i2s_wake_enable" = "1"
 	register "acpi_pme_enable" = "1"
 
-	# DMIC select GPIO for ACP machine device
-	# This GPIO is used to select DMIC0 or DMIC1 by the kernel driver. It does not
-	# really have a polarity since low and high control the selection of DMIC and
-	# hence does not have an active polarity.
-	# Kernel driver does not use the polarity field and instead treats the GPIO
-	# selection as follows:
-	# Set low (0) = Select DMIC0
-	# Set high (1) = Select DMIC1
-	register "dmic_select_gpio" = "ACPI_GPIO_OUTPUT(GPIO_67)"
-
 	# Start : OPN Performance Configuration
 	# (Configuratin that is common for all variants)
 	# For the below fields, 0 indicates use SOC default
@@ -301,7 +291,22 @@ chip soc/amd/picasso
 					end
 				end
 			end
-			device pci 0.5 on  end # Audio
+			device pci 0.5 on
+				chip drivers/amd/i2s_machine_dev
+					register "hid" = ""AMDI5682""
+					# DMIC select GPIO for ACP machine device
+					# This GPIO is used to select DMIC0 or DMIC1 by the
+					# kernel driver. It does not really have a polarity
+					# since low and high control the selection of DMIC and
+					# hence does not have an active polarity.
+					# Kernel driver does not use the polarity field and
+					# instead treats the GPIO selection as follows:
+					# Set low (0) = Select DMIC0
+					# Set high (1) = Select DMIC1
+					register "dmic_select_gpio" = "ACPI_GPIO_OUTPUT(GPIO_67)"
+					device generic 0.0 on end
+				end
+			end # Audio
 			device pci 0.6 on  end # HDA
 			device pci 0.7 on  end # non-Sensor Fusion Hub device
 		end

src/mainboard/google/zork/variants/baseboard/ramstage_common.c

@@ -2,19 +2,48 @@
 
 #include <acpi/acpi_device.h>
 #include <baseboard/variants.h>
+#include <drivers/amd/i2s_machine_dev/chip.h>
 #include <ec/google/chromeec/ec.h>
 #include <soc/gpio.h>
+#include <soc/pci_devs.h>
+
+extern struct chip_operations drivers_amd_i2s_machine_dev_ops;
 
 void variant_audio_update(void)
 {
-	struct soc_amd_picasso_config *cfg = config_of_soc();
+	const struct device *gpp_a_dev;
-	struct acpi_gpio *gpio = &cfg->dmic_select_gpio;
+	const struct device *acp_dev;
+	struct device *machine_dev = NULL;
 
 	if (variant_uses_v3_schematics())
 		return;
 
-	if (CONFIG(BOARD_GOOGLE_BASEBOARD_TREMBYLE))
+	gpp_a_dev = pcidev_path_on_root(PCIE_GPP_A_DEVFN);
-		gpio->pins[0] = GPIO_13;
+	if (gpp_a_dev == NULL)
-	else
+		return;
-		gpio->pins[0] = GPIO_6;
+
+	acp_dev = pcidev_path_behind(gpp_a_dev->link_list, AUDIO_DEVFN);
+	if (acp_dev == NULL)
+		return;
+
+	while ((machine_dev = dev_bus_each_child(acp_dev->link_list, machine_dev)) != NULL) {
+		struct drivers_amd_i2s_machine_dev_config *cfg;
+		struct acpi_gpio *gpio;
+
+		if (machine_dev->chip_info == NULL)
+			continue;
+
+		if (machine_dev->chip_ops != &drivers_amd_i2s_machine_dev_ops)
+			continue;
+
+		cfg = machine_dev->chip_info;
+		gpio = &cfg->dmic_select_gpio;
+
+		if (CONFIG(BOARD_GOOGLE_BASEBOARD_TREMBYLE))
+			gpio->pins[0] = GPIO_13;
+		else
+			gpio->pins[0] = GPIO_6;
+
+		break;
+	}
 }