- /* This is an assumption that the system sends stereo audio to the
amplifier typically.
* And the stereo audio is placed in slot 0/2/4/6 as the starting slot.* According to the slot number, we also set the mono LR to select theright slot.
*/- first_bit = __ffs(rx_mask);
- switch (first_bit) {
- case 0:
- case 2:
- case 4:
- case 6:
snd_soc_component_update_bits(component,RT1015_PAD_DRV2, RT1015_MONO_LR_SEL_MASK,RT1015_MONO_L_CHANNEL);snd_soc_component_update_bits(component,RT1015_TDM1_4,RT1015_TDM_I2S_TX_L_DAC1_1_MASK |RT1015_TDM_I2S_TX_R_DAC1_1_MASK,(first_bit << RT1015_TDM_I2S_TX_L_DAC1_1_SFT) |((first_bit+1) << RT1015_TDM_I2S_TX_R_DAC1_1_SFT));break;- case 1:
- case 3:
- case 5:
- case 7:
snd_soc_component_update_bits(component,RT1015_PAD_DRV2, RT1015_MONO_LR_SEL_MASK,RT1015_MONO_R_CHANNEL);snd_soc_component_update_bits(component,RT1015_TDM1_4,RT1015_TDM_I2S_TX_L_DAC1_1_MASK |RT1015_TDM_I2S_TX_R_DAC1_1_MASK,((first_bit-1) << RT1015_TDM_I2S_TX_L_DAC1_1_SFT) |(first_bit << RT1015_TDM_I2S_TX_R_DAC1_1_SFT));break;One more question from me: if you have 2 amplifiers on the same link and use slot 0 and 1, what would be the rx_mask for each amplifier? If the mask is BIT(0) for left and BIT(1) for right, it looks like both would render L+R?
Oh, I didn't expect that the customers want to render L+R when using TDM configuration.
Also should the settings and channel selection be modifiable using the codec configuration as we've done for RT1308, e.g. rt1015-1 would use LL and rt1015-2 would use RR?
OK, I will remove the mono LR channel selection in rt1015_set_tdm_slot function. The channel selection setting would be controlled by the application level only. RT1015 is a mono amplifier, it could select 'Left', 'Right' and 'Left + Right average'.
Thanks -Pierre
------Please consider the environment before printing this e-mail.