Claudiu Beznea c5682e2ba1 ASoC: mchp-pdmc: fix poc noise at capture startup ... Microchip PDMC IP doesn't filter microphone noises on startup. By default, it captures data received from digital microphones after the MCHP_PDMC_MR.EN bits are set. Thus when enable is set on PDMC side the digital microphones might not be ready yet and PDMC captures data from then in this time. This data captured is poc noise. To avoid this the software workaround is to the following: 1/ enable PDMC channel 2/ wait 150ms (on SAMA7G5-EK setup) 3/ execute 16 dummy reads from RHR 4/ clear interrupts 5/ enable interrupts 6/ enable DMA channel Fixes: 50291652af ("ASoC: atmel: mchp-pdmc: add PDMC driver") Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Link: https://lore.kernel.org/r/20230228110145.3770525-4-claudiu.beznea@microchip.com Signed-off-by: Mark Brown <broonie@kernel.org>		2023-02-28 13:58:50 +00:00
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atmel-classd.c	ASoC: atmel-classd: Drop empty platform remove function	2022-12-25 23:32:43 +00:00
atmel-classd.h
atmel-i2s.c	ASoC: atmel: Migrate to new style legacy DAI naming flag	2022-06-27 13:16:31 +01:00
atmel-pcm-dma.c	ASoC: atmel-pcm: remove unnecessary include	2020-09-30 16:12:13 +01:00
atmel-pcm-pdc.c	ASoC: atmel-pdc: Use managed DMA buffer allocation	2021-01-13 11:36:15 +00:00
atmel-pcm.h
atmel-pdmic.c	ASoC: atmel-pdmic: Drop empty platform remove function	2022-12-25 23:32:44 +00:00
atmel-pdmic.h
atmel_ssc_dai.c	ASoC: atmel_ssc_dai: Remove the unneeded result variable	2022-08-23 13:04:51 +01:00
atmel_ssc_dai.h
atmel_wm8904.c	ASoC: atmel: Convert to new style DAI format definitions	2021-09-16 14:11:30 +01:00
Kconfig	ASoC: wm8731: Factor out the I2C and SPI bus code into separate modules	2022-04-04 08:39:32 +01:00
Makefile	ASoC: atmel: mchp-pdmc: add PDMC driver	2022-03-08 13:38:59 +00:00
mchp-i2s-mcc.c	ASoC: atmel: Migrate to new style legacy DAI naming flag	2022-06-27 13:16:31 +01:00
mchp-pdmc.c	ASoC: mchp-pdmc: fix poc noise at capture startup	2023-02-28 13:58:50 +00:00
mchp-spdifrx.c	ASoC: mchp-spdifrx: Fix uninitialized use of mr in mchp_spdifrx_hw_params()	2023-02-02 17:36:53 +00:00
mchp-spdiftx.c	ASoC: mchp-spdiftx: use FIELD_PREP() where possible	2022-12-25 23:33:18 +00:00
mikroe-proto.c	ASoC: core: Make snd_soc_unregister_card() return void	2022-06-22 13:39:34 +01:00
sam9g20_wm8731.c	ASoC: sam9g20_wm8731: Simplify some error message	2022-08-15 01:20:05 +01:00
sam9x5_wm8731.c	ASoC: atmel: Fix error handling in sam9x5_wm8731_driver_probe	2022-03-16 16:39:19 +00:00
tse850-pcm5142.c	ASoC: ateml: Use dev_err_probe() helper	2021-12-20 12:47:12 +00:00