pcm1862: add pre-ADC gain setting

software/sys_controller/ossc/av_controller.c

@@ -348,6 +348,9 @@ status_t get_status(tvp_input_t input, video_format format)
 #endif
         (tc.audio_swap_lr != cm.cc.audio_swap_lr))
         SetupAudio(tc.tx_mode);
+
+    if (pcm1862_active && (tc.audio_gain != cm.cc.audio_gain))
+        pcm_set_gain(tc.audio_gain-AUDIO_GAIN_0DB);
 #endif
 
     cm.cc = tc;

software/sys_controller/ossc/avconfig.c

@@ -57,6 +57,7 @@ const avconfig_t tc_default = {
 #ifdef ENABLE_AUDIO
     .audio_dw_sampl = DEFAULT_ON,
     .tx_mode = TX_HDMI,
+    .audio_gain = AUDIO_GAIN_0DB,
 #endif
     .col = {
         .r_f_gain = DEFAULT_FINE_GAIN,

software/sys_controller/ossc/avconfig.h

@@ -38,6 +38,11 @@
 #define SL_MODE_MAX         2
 #define SL_TYPE_MAX         2
 
+#define AUDIO_GAIN_M12DB    0
+#define AUDIO_GAIN_0DB      12
+#define AUDIO_GAIN_12DB     24
+#define AUDIO_GAIN_MAX      AUDIO_GAIN_12DB
+
 #define L5FMT_1920x1080     0
 #define L5FMT_1600x1200     1
 #define L5FMT_1920x1200     2
@@ -82,6 +87,7 @@ typedef struct {
 #ifdef ENABLE_AUDIO
     alt_u8 audio_dw_sampl;
     alt_u8 audio_swap_lr;
+    alt_u8 audio_gain;
 #endif
     color_setup_t col;
 } __attribute__((packed)) avconfig_t;

software/sys_controller/ossc/menu.c

@@ -74,6 +74,7 @@ static void lines_disp(alt_u8 v) { sniprintf(menu_row2, LCD_ROW_LEN+1, LNG("%u l
 static void pixels_disp(alt_u8 v) { sniprintf(menu_row2, LCD_ROW_LEN+1, LNG("%u pixels","%u ﾄﾞｯﾄ"), v); }
 static void value_disp(alt_u8 v) { sniprintf(menu_row2, LCD_ROW_LEN+1, "    %u", v); }
 static void lt_disp(alt_u8 v) { strncpy(menu_row2, lt_desc[v], LCD_ROW_LEN+1); }
+static void aud_db_disp(alt_u8 v) { sniprintf(menu_row2, LCD_ROW_LEN+1, "%d dB", ((alt_8)v-AUDIO_GAIN_0DB)); }
 static void vm_display_name (alt_u8 v) { strncpy(menu_row2, video_modes[v].name, LCD_ROW_LEN+1); }
 
 static const arg_info_t vm_arg_info = {&vm_sel, VIDEO_MODES_CNT-1, vm_display_name};
@@ -157,6 +158,7 @@ MENU(menu_compatibility, P99_PROTECT({ \
 MENU(menu_audio, P99_PROTECT({ \
     { LNG("Down-sampling","ﾀﾞｳﾝｻﾝﾌﾟﾘﾝｸﾞ"),       OPT_AVCONFIG_SELECTION, { .sel = { &tc.audio_dw_sampl, OPT_WRAP, SETTING_ITEM(audio_dw_sampl_desc) } } },
     { LNG("Swap left/right","ﾋﾀﾞﾘ/ﾐｷﾞｽﾜｯﾌﾟ"),    OPT_AVCONFIG_SELECTION, { .sel = { &tc.audio_swap_lr,  OPT_WRAP, SETTING_ITEM(off_on_desc) } } },
+    { "Pre-ADC gain",                           OPT_AVCONFIG_NUMVALUE,  { .num = { &tc.audio_gain,     OPT_NOWRAP, 0, AUDIO_GAIN_MAX, aud_db_disp } } },
 }))
 #define AUDIO_MENU { LNG("Audio options  >","ｵｰﾃﾞｨｵｵﾌﾟｼｮﾝ     >"),                  OPT_SUBMENU,            { .sub = { &menu_audio, NULL, NULL } } },
 #else

software/sys_controller/pcm1862/pcm1862.c

@@ -48,6 +48,13 @@ void pcm_source_sel(pcm_input_t input) {
     pcm1862_writereg(PCM1862_ADC1R, adc_ch);
 }
 
+void pcm_set_gain(alt_8 db_gain) {
+    alt_8 gain_val = 2*db_gain;
+
+    pcm1862_writereg(PCM1862_PGA1L, gain_val);
+    pcm1862_writereg(PCM1862_PGA1R, gain_val);
+}
+
 int pcm1862_init()
 {
     if (pcm1862_readreg(0x05) != 0x86)

software/sys_controller/pcm1862/pcm1862.h

@@ -30,7 +30,9 @@ typedef enum {
     PCM_INPUT4 = 3
 } pcm_input_t;
 
-void pcm_source_sel(pcm_input_t input) ;
+void pcm_source_sel(pcm_input_t input);
+
+void pcm_set_gain(alt_8 db_gain);
 
 int pcm1862_init();
 

software/sys_controller_bsp/settings.bsp

@@ -2,8 +2,8 @@
 <sch:Settings xmlns:sch="http://www.altera.com/embeddedsw/bsp/schema">
         <BspType>hal</BspType>
         <BspVersion>default</BspVersion>
-        <BspGeneratedTimeStamp>Feb 22, 2018 9:52:06 PM</BspGeneratedTimeStamp>
-        <BspGeneratedUnixTimeStamp>1519329126233</BspGeneratedUnixTimeStamp>
+        <BspGeneratedTimeStamp>Feb 24, 2018 7:18:24 PM</BspGeneratedTimeStamp>
+        <BspGeneratedUnixTimeStamp>1519492704534</BspGeneratedUnixTimeStamp>
         <BspGeneratedLocation>./</BspGeneratedLocation>
         <BspSettingsFile>settings.bsp</BspSettingsFile>
         <SopcDesignFile>../../sys.sopcinfo</SopcDesignFile>