Depending on sample rate the PDM must be clocked at either 24.576MHz or
22.5792MHz. CLK_DIV is later calculated as function of PDM root clock
frequency and FS. Setting PDM root clock = FS * 1024 is wrong because
for low sample rate such as 8000 the PDM root clock will be 8000 * 1024
= 8192000 Hz so PDM will be underclocked for this sample rate.
Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
The original patch updates REG_MICFIL_STAT in fsl_micfil_reset
method, but not in configure_hwvad_interrupts, fix this.
Fixes: e12b0060cd ("MLK-22598: ASoC: fsl_micfil: Reset channel output
data Flag")
Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
The call flow:
devm_regmap_init_mmio_clk
- clk_prepare()
- clk_pm_runtime_get()
Cause the power domain of ipg clock always be enabled.
which impact the power consumption.
so we can't bind clock with regmap, but explicitly enable
clock when using.
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Viorel Suman <viorel.suman@nxp.com>
The new features are:
1. The output is 24 more significative bits in 32bit slot
2. The fifo depth is 32 entries.
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
With the case below, there is issue that after recording with
8 channels, the recording of 1 channel will fail.
arecord -Dhw:2,0 -r 32000 -f S16_LE -c 8 -d 5 -t raw /tmp/test1.pcm
arecord -Dhw:2,0 -r 32000 -f S16_LE -c 1 -d 5 -t raw /tmp/test2.pcm
arecord: pcm_read:2143: read error: Input/output error
The reason is that we need to reset channel output data Flag before
we start the recording
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
(cherry picked from commit 45ea3acd0c0c67a7b33faee9818401c6fbcc8c96)
Merge the changes from imx_4.19.y
The top commit is:
b5472e3f3dd1 ("MLK-21775-4: ASoC: fsl_micfil: synchronize HWVAD enable/disable")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Fixes gcc '-Wunused-but-set-variable' warning:
sound/soc/fsl/fsl_micfil.c: In function 'get_clk_div':
sound/soc/fsl/fsl_micfil.c:154:6: warning: variable 'osr' set but not used [-Wunused-but-set-variable]
It is never used since introduction in
commit 47a70e6fc9 ("ASoC: Add MICFIL SoC Digital Audio Interface driver.")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Add Digital Audio Interface driver that convers PDM bitstream to PCM
format.
Features:
- Fixed filtering characteristics for audio application.
- Full or partial set of channels operation with individual enable control.
- Programmable PDM clock generator.
- Programmable decimation rate.
- 16-bit signed output result.
- Overall stopband attenuation more than 80dB.
- Overall passband ripple less than 0.2dB.
Signed-off-by: Cosmin-Gabriel Samoila <cosmin.samoila@nxp.com>
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Viorel Suman