Hi Mark,
I have two quick questions regarding the DAI and its TDM support.
On Tue, Mar 15, 2016 at 05:47:46PM -0500, tim.howe@cirrus.com wrote:
+static const struct snd_soc_dapm_route cs53l30_audio_map[] = {
- /* ADC Input Paths */
- {"ADC1A", NULL, "IN1_DMIC1"},
- {"Input Mux 1", "ADC1_SEL", "ADC1A"},
- {"ADC1B", NULL, "IN2"},
- {"ADC2A", NULL, "IN3_DMIC2"},
- {"Input Mux 2", "ADC2_SEL", "ADC2A"},
- {"ADC2B", NULL, "IN4"},
- /* MIC Bias Paths */
- {"ADC1A", NULL, "MIC1 Bias"},
- {"ADC1B", NULL, "MIC2 Bias"},
- {"ADC2A", NULL, "MIC3 Bias"},
- {"ADC2B", NULL, "MIC4 Bias"},
- /* DMIC Paths */
- {"DMIC1", NULL, "IN1_DMIC1"},
- {"Input Mux 1", "DMIC1_SEL", "DMIC1"},
- {"DMIC2", NULL, "IN3_DMIC2"},
- {"Input Mux 2", "DMIC2_SEL", "DMIC2"},
- /* Output Paths */
- {"ASP_SDOUT1", NULL, "ADC1A" },
- {"ASP_SDOUT1", NULL, "Input Mux 1"},
- {"ASP_SDOUT1", NULL, "ADC1B"},
- {"ASP_SDOUT2", NULL, "ADC2A"},
- {"ASP_SDOUT2", NULL, "Input Mux 2"},
- {"ASP_SDOUT2", NULL, "ADC2B"},
- {"ASP1 Capture", NULL, "ASP_SDOUT1"},
- {"ASP2 Capture", NULL, "ASP_SDOUT2"},
+};
This codec chip has two SDOUT (Serial Data Output) pins while sharing one serial port -- there's only one pair of bit clock and fsync clock.
+static struct snd_soc_dai_driver cs53l30_dai[] = {
- {
.name = "cs53l30-asp1",.id = CS53L30_ASP1,.capture = {.stream_name = "ASP1 Capture",.channels_min = 1,.channels_max = 2,.rates = CS53L30_RATES,.formats = CS53L30_FORMATS,},.ops = &cs53l30_ops,.symmetric_rates = 1,},- {
.name = "cs53l30-asp2",.id = CS53L30_ASP2,.capture = {.stream_name = "ASP2 Capture",.channels_min = 1,.channels_max = 2,.rates = CS53L30_RATES,.formats = CS53L30_FORMATS,},.ops = &cs53l30_ops,.symmetric_rates = 1,}+};
In this case, would it be more appropriate to create one single DAI with channels_max = 4 over here?
Another question is for its TDM support. This chip outputs 4-channel data on two data output pins (SDOUT1 and SDOUT2) as normal mode; it outputs 4-channel data on one data output pin (SDOUT1) as TDM mode. However, the mode selection for a 4-channel recording should depend on the hardware design: whether the SDOUT2 is connected or not. So I am wondering if there is a common way or existing way to indicate this hardware design. Or just by simply defining a new DT property?
Thank you Nicolin