+ /* 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 the right 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?
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?
Thanks
-Pierre
