WIP: esp32c6: add ESP32-C6 platform support and loopback test suite

app/boards/esp32c6_devkitc_esp32c6_hpcore.conf

@@ -0,0 +1,68 @@
+# Target Platform & SOF Core
+CONFIG_PLATFORM_ESP32C6=y
+CONFIG_STATIC_PIPELINE=y
+CONFIG_SOF_FULL_ZEPHYR_APPLICATION=y
+CONFIG_ZEPHYR_NATIVE_DRIVERS=y
+CONFIG_BUILD_OUTPUT_BIN=y
+
+# Zephyr DAI Drivers for ESP32
+CONFIG_DAI=y
+CONFIG_DAI_ESPRESSIF_I2S=y
+CONFIG_PINCTRL=y
+CONFIG_DMA=y
+CONFIG_DMA_ESP32_MAX_DESCRIPTOR_NUM=32
+
+# Audio Processing Modules (Fixed-Point S16_LE Only - No Float / SIMD)
+CONFIG_FORMAT_S16LE=y
+CONFIG_COMP_VOLUME=y
+CONFIG_COMP_USB_AUDIO=y
+CONFIG_COMP_BT_AUDIO=n
+CONFIG_FILTER_RISCV_SIMD=n
+CONFIG_DRC_RISCV_SIMD=n
+CONFIG_EQ_IIR_RISCV_SIMD=n
+CONFIG_VOLUME_RISCV_SIMD=n
+CONFIG_COMP_DRC=n
+CONFIG_COMP_IIR=n
+CONFIG_COMP_FIR=n
+CONFIG_COMP_CROSSOVER=n
+CONFIG_COMP_DCBLOCK=n
+CONFIG_COMP_MULTIBAND_DRC=n
+CONFIG_COMP_TDFB=n
+
+# No Native USB UAC2 (ESP32-C6 uses USB-Serial/JTAG CDC-ACM)
+CONFIG_USB_DEVICE_STACK_NEXT=n
+CONFIG_USBD_AUDIO2_CLASS=n
+
+# System Resources & Memory (SRAM Budget: 512 KB)
+CONFIG_MAIN_STACK_SIZE=3072
+CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=3072
+CONFIG_ISR_STACK_SIZE=2048
+CONFIG_HW_STACK_PROTECTION=n
+CONFIG_HEAP_MEM_POOL_SIZE=8192
+CONFIG_TICKLESS_KERNEL=n
+CONFIG_SYS_CLOCK_TICKS_PER_SEC=1000
+
+# Logging & USB-Serial Console
+CONFIG_LOG=y
+CONFIG_LOG_DEFAULT_LEVEL=3
+CONFIG_LOG_MAX_LEVEL=4
+CONFIG_SOF_LOG_LEVEL_INF=y
+CONFIG_DAI_LOG_LEVEL_INF=y
+CONFIG_LOG_MODE_DEFERRED=y
+CONFIG_LOG_BUFFER_SIZE=2048
+CONFIG_LOG_MODE_OVERFLOW=y
+CONFIG_PRINTK=y
+CONFIG_LOG_PRINTK=n
+CONFIG_EARLY_CONSOLE=y
+
+# Interactive Shell over USB-Serial/JTAG
+CONFIG_SHELL=y
+CONFIG_SHELL_STACK_SIZE=4096
+CONFIG_SHELL_BACKENDS=y
+CONFIG_SHELL_BACKEND_SERIAL=y
+CONFIG_SHELL_PROMPT_UART="sof:~$ "
+
+# SOF Low Latency Scheduler Statistics Logging (Every 1s)
+CONFIG_SCHEDULE_LL_STATS_LOG=y
+CONFIG_SCHEDULE_LL_STATS_LOG_EVERY_OTHER_WINDOW=n
+CONFIG_SCHEDULE_LL_STATS_LOG_WINDOW_SIZE=10

app/boards/esp32c6_devkitc_esp32c6_hpcore.overlay

@@ -0,0 +1,34 @@
+#include <zephyr/dt-bindings/interrupt-controller/esp-esp32c6-intmux.h>
+
+/ {
+	chosen {
+		zephyr,console = &usb_serial;
+		zephyr,shell-uart = &usb_serial;
+	};
+
+	dai_i2s0: dai@6000c000 {
+		compatible = "espressif,esp32-dai-i2s";
+		status = "okay";
+		reg = <0x6000c000 0x1000>;
+		interrupt-parent = <&intc>;
+		interrupts = <I2S1_INTR_SOURCE IRQ_DEFAULT_PRIORITY 0>;
+		dai-index = <0>;
+		fifo-depth = <32>;
+	};
+};
+
+&dma {
+	status = "okay";
+};
+
+&usb_serial {
+	status = "okay";
+};
+
+&i2c0 {
+	status = "disabled";
+};
+
+&uart0 {
+	status = "disabled";
+};

app/boards/xiao_esp32c6_esp32c6_hpcore.conf

@@ -0,0 +1,68 @@
+# Target Platform & SOF Core
+CONFIG_PLATFORM_ESP32C6=y
+CONFIG_STATIC_PIPELINE=y
+CONFIG_SOF_FULL_ZEPHYR_APPLICATION=y
+CONFIG_ZEPHYR_NATIVE_DRIVERS=y
+CONFIG_BUILD_OUTPUT_BIN=y
+
+# Zephyr DAI Drivers for ESP32
+CONFIG_DAI=y
+CONFIG_DAI_ESPRESSIF_I2S=y
+CONFIG_PINCTRL=y
+CONFIG_DMA=y
+CONFIG_DMA_ESP32_MAX_DESCRIPTOR_NUM=32
+
+# Audio Processing Modules (Fixed-Point S16_LE Only - No Float / SIMD)
+CONFIG_FORMAT_S16LE=y
+CONFIG_COMP_VOLUME=y
+CONFIG_COMP_USB_AUDIO=y
+CONFIG_COMP_BT_AUDIO=n
+CONFIG_FILTER_RISCV_SIMD=n
+CONFIG_DRC_RISCV_SIMD=n
+CONFIG_EQ_IIR_RISCV_SIMD=n
+CONFIG_VOLUME_RISCV_SIMD=n
+CONFIG_COMP_DRC=n
+CONFIG_COMP_IIR=n
+CONFIG_COMP_FIR=n
+CONFIG_COMP_CROSSOVER=n
+CONFIG_COMP_DCBLOCK=n
+CONFIG_COMP_MULTIBAND_DRC=n
+CONFIG_COMP_TDFB=n
+
+# No Native USB UAC2 (ESP32-C6 uses USB-Serial/JTAG CDC-ACM)
+CONFIG_USB_DEVICE_STACK_NEXT=n
+CONFIG_USBD_AUDIO2_CLASS=n
+
+# System Resources & Memory (SRAM Budget: 512 KB)
+CONFIG_MAIN_STACK_SIZE=3072
+CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=3072
+CONFIG_ISR_STACK_SIZE=2048
+CONFIG_HW_STACK_PROTECTION=n
+CONFIG_HEAP_MEM_POOL_SIZE=8192
+CONFIG_TICKLESS_KERNEL=n
+CONFIG_SYS_CLOCK_TICKS_PER_SEC=1000
+
+# Logging & USB-Serial Console
+CONFIG_LOG=y
+CONFIG_LOG_DEFAULT_LEVEL=3
+CONFIG_LOG_MAX_LEVEL=4
+CONFIG_SOF_LOG_LEVEL_INF=y
+CONFIG_DAI_LOG_LEVEL_INF=y
+CONFIG_LOG_MODE_DEFERRED=y
+CONFIG_LOG_BUFFER_SIZE=2048
+CONFIG_LOG_MODE_OVERFLOW=y
+CONFIG_PRINTK=y
+CONFIG_LOG_PRINTK=n
+CONFIG_EARLY_CONSOLE=y
+
+# Interactive Shell over USB-Serial/JTAG
+CONFIG_SHELL=y
+CONFIG_SHELL_STACK_SIZE=4096
+CONFIG_SHELL_BACKENDS=y
+CONFIG_SHELL_BACKEND_SERIAL=y
+CONFIG_SHELL_PROMPT_UART="sof:~$ "
+
+# SOF Low Latency Scheduler Statistics Logging (Every 1s)
+CONFIG_SCHEDULE_LL_STATS_LOG=y
+CONFIG_SCHEDULE_LL_STATS_LOG_EVERY_OTHER_WINDOW=n
+CONFIG_SCHEDULE_LL_STATS_LOG_WINDOW_SIZE=10

app/boards/xiao_esp32c6_esp32c6_hpcore.overlay

@@ -0,0 +1,38 @@
+#include <zephyr/dt-bindings/interrupt-controller/esp-esp32c6-intmux.h>
+
+/ {
+	chosen {
+		zephyr,console = &usb_serial;
+		zephyr,shell-uart = &usb_serial;
+	};
+
+	dai_i2s0: dai@6000c000 {
+		compatible = "espressif,esp32-dai-i2s";
+		status = "okay";
+		reg = <0x6000c000 0x1000>;
+		interrupt-parent = <&intc>;
+		interrupts = <I2S1_INTR_SOURCE IRQ_DEFAULT_PRIORITY 0>;
+		dai-index = <0>;
+		fifo-depth = <32>;
+	};
+};
+
+&dma {
+	status = "okay";
+};
+
+&usb_serial {
+	status = "okay";
+};
+
+&i2c0 {
+	status = "disabled";
+};
+
+&spi2 {
+	status = "disabled";
+};
+
+&uart0 {
+	status = "disabled";
+};

app/src/main.c

@@ -8,6 +8,11 @@
 #include <sof/boot_test.h>
 #include <zephyr/logging/log.h>
 
+#if defined(CONFIG_PLATFORM_ESP32C6)
+#include <rtos/sof.h>
+#include <sof/audio/pipeline/sof_static_pipeline.h>
+#endif
+
 LOG_MODULE_REGISTER(main, LOG_LEVEL_DBG);
 
 /* define qemu boot tests if any qemu target is defined, add targets to end */
@@ -41,6 +46,12 @@ static int sof_app_main(void)
 
 	LOG_INF("SOF initialized");
 
+#if defined(CONFIG_PLATFORM_ESP32C6)
+	/* Initialize static audio pipelines */
+	sof_static_pipelines_init(sof_get());
+	LOG_INF("ESP32-C6 SOF static pipelines started (I2S loopback ready)");
+#endif
+
 #ifdef CONFIG_ARCH_POSIX_LIBFUZZER
 	/* Workaround for an apparent timing bug in libfuzzer+asan.
 	 * If the initial/main thread is allowed to return, ASAN will