feat: Add TAS5805M DAC settings and 15-band equalizer UI (#183)

This PR adds comprehensive DAC configuration and equalizer support for the TAS5805M chip with a web UI.

Major Features:
- TAS5805M DAC settings page with configurable parameters:
  * Bridge mode, modulation mode, switching frequency
  * Analog and digital volume control
  * Mixer implementation with compensation gains
  * Fault monitoring and fault reset
- 15-band parametric equalizer with two modes:
  * Manual 15-band EQ control with per-band gains
  * HF and LF filter presets for quick bi-amp configuration
  * Real-time updates and visualization
- New dedicated settings component (tas5805m_settings) for persistence
- All settings persist to NVS and restore on boot

Architecture Improvements:
- Created dedicated tas5805m_settings component
- DAC UI in the dedicated HTML tab
- Data-driven front-end with settings-ui.js renderer

Bug Fixes:
- Fixed EQ UI showing 0 gains before music starts
- Fixed channel gains not restoring on reboot
- Fixed NULL semaphore crashes during player restart
- Fixed DSP init ordering (semaphore creation before use)
- Fixed NULL pointer checks in mDNS and player
- Fixed WiFi power save interfering with low-latency audio
- Fixed settings persistence and restoration

Technical Details:
- Extended partitions.csv for additional storage
- Settings stored in NVS with proper restoration
- DSP processor coordination with I2S clock requirements
- Delayed settings application after DAC initialization
- Proper semaphore and mutex protection

Co-authored-by: andriy.malyshenko <[email protected]>
Co-authored-by: Andriy Malyshenko <[email protected]>, craigmillard86 <[email protected]>

Author: 3 people

components/audio_board/Kconfig.projbuild

@@ -173,7 +173,7 @@ menu "Audio Board"
 
 	    endmenu
 
-	    menu "TAS5805M interface Configuration"
+	    menu "TAS5805M interface configuration"
 	        depends on DAC_TAS5805M
 
 	        config PIN_DAC_PWDN
@@ -182,29 +182,20 @@ menu "Audio Board"
 	            default 33
 	            help
 	                GPIO number to power down the DAC
-	    endmenu
-
-	    menu "DAC-Operation-Mode"
-			depends on DAC_TAS5805M
-
-	        choice DAC_BRIDGE_MODE
-	            prompt "Bridge-Mode selection"
-	            default DAC_BRIDGE_MODE_DISABLED
-
-				config DAC_BRIDGE_MODE_DISABLED
-					bool "Stereo (bridge mode disabled)"
+        
+		endmenu
 
-				config DAC_BRIDGE_MODE_MONO
-					bool "Mono mode (Left + Right / 2)"
-				
-				config DAC_BRIDGE_MODE_LEFT
-					bool "Output left input channel"
+	    menu "TAS5805M DSP Support"
+	        depends on DAC_TAS5805M
 
-				config DAC_BRIDGE_MODE_RIGHT
-					bool "Output right input channel"
-	        
-			endchoice
-		endmenu
+			config DAC_TAS5805M_EQ_SUPPORT
+				bool "Enable TAS5805M equalizer support"
+				default false
+				help
+					When enabled, build includes optional TAS5805M equalizer support.
+					Equalizer configuration and runtime control remain available via
+					the device UI. Default: disabled.
+	    endmenu
 
 		menu "Merus MA120x0 interface Configuration"
 			 depends on DAC_MA120X0

components/audio_hal/CMakeLists.txt

@@ -18,8 +18,8 @@ IF (NOT ((CONFIG_IDF_TARGET STREQUAL "esp32c3") OR (CONFIG_IDF_TARGET STREQUAL "
 endif()
 
 # Edit following two lines to set component requirements (see docs)
-set(COMPONENT_REQUIRES )
-set(COMPONENT_PRIV_REQUIRES audio_sal audio_board mbedtls esp_peripherals custom_board)
+set(COMPONENT_REQUIRES audio_sal)
+set(COMPONENT_PRIV_REQUIRES audio_board mbedtls esp_peripherals custom_board)
 
 set(COMPONENT_SRCS ./audio_hal.c
                     ./audio_volume.c

components/audio_hal/driver/tas5805m/tas5805m_reg_cfg.h

@@ -43,10 +43,6 @@ typedef struct {
   uint8_t value;
 } tas5805m_cfg_reg_t;
 
-static const uint8_t tas5805m_volume[] = {
-    0xff, 0x9f, 0x8f, 0x7f, 0x6f, 0x5f, 0x5c, 0x5a, 0x58, 0x54, 0x50,
-    0x4c, 0x4a, 0x48, 0x44, 0x40, 0x3d, 0x3b, 0x39, 0x37, 0x35};
-
 static const tas5805m_cfg_reg_t tas5805m_registers[] = {
     // RESET
     {0x00, 0x00},

components/custom_board/CMakeLists.txt

@@ -1,6 +1,6 @@
 # Edit following two lines to set component requirements (see docs)
-set(COMPONENT_REQUIRES)
-set(COMPONENT_PRIV_REQUIRES audio_hal esp_peripherals)
+set(COMPONENT_REQUIRES audio_hal audio_board)
+set(COMPONENT_PRIV_REQUIRES esp_peripherals)
 
 if(CONFIG_AUDIO_BOARD_CUSTOM)
   message(STATUS "Current board name is " CONFIG_AUDIO_BOARD_CUSTOM)