> 2011/6/10 Péter Ujfalusi <peter.ujfalusi@xxxxxx>: > 1. when use Headset: > uplink routing:HSMIC --> AVTXR2PGA & AVTXL2PGA --> VDXS & VDXM --> PCM_VDX > downlink routing:PCM_VDR --> VDR --> VRXPGA Fine gain --> DAC voice > --> VDL_GAIN Analog PGA --> HSOL/HSOR Thanks > I check the loopbacks,it seems that all Loopbacks have been disabled. > bash-3.2# alsa_amixer |grep Loopback > Simple mixer control 'Left Digital Loopback',0 > Simple mixer control 'Left1 Analog Loopback',0 > Simple mixer control 'Left2 Analog Loopback',0 > Simple mixer control 'Right Digital Loopback',0 > Simple mixer control 'Right1 Analog Loopback',0 > Simple mixer control 'Right2 Analog Loopback',0 > Simple mixer control 'Voice Analog Loopback',0 > Simple mixer control 'Voice Digital Loopback',0 Can you check with: amixer | grep -A 6 Loopback > The sidetone is become louder if I increase the VSTPGA, > and when I increase the VDL_GAIN Analog PGA,the sidetone is become louder > too. But the VRXPGA seems don't affect the sidetone,so I think VSTPGA > cause the sidetone. > > 2.when use Bluetooth: > uplink routing:BT_PCM_VDR --> BTTXPGA --> VDXM --> PCM_VDX > downlink routing:PCM_VDR --> VDR --> BTRXPGA --> BT_PCM_VDX > > When use Bluetooth interface,I don't know if something else can cause > sidetone except BTSTPGA. I don't have a board, which have this feature, but I'll check the TRM and the code, if I can find something. Probably worth to find the ERRATA document as well... -- Péter -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
