ASoC: mediatek: mt8192: skip first time data at the beginning of DMIC recording

We can choose to drop away any length of data from the beginning according
to project needs. Some projects don't want to throw away any data, because
they want to use recorded data to do echo cancellation, so they have to
make sure that they are aligned with the reference data as much as
possible. Or there are other algorithms in the upper layer to eliminate
this noise. Or some projects want to eliminate this noise form the kernel
layer. However, the minimum recommended value is 50ms to skip pop noise.

Signed-off-by: Jiaxin Yu <jiaxin.yu@mediatek.com>
Link: https://lore.kernel.org/r/1605062722-8711-1-git-send-email-jiaxin.yu@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/mediatek/Kconfig b/sound/soc/mediatek/Kconfig
index d453240..49772df 100644 (file)
--- a/sound/soc/mediatek/Kconfig
+++ b/sound/soc/mediatek/Kconfig
@@ -176,6 +176,7 @@ config SND_SOC_MT8192_MT6359_RT1015_RT5682
        select SND_SOC_MT6359
        select SND_SOC_RT1015
        select SND_SOC_RT5682_I2C
+       select SND_SOC_DMIC
        help
          This adds ASoC driver for Mediatek MT8192 boards
          with the MT6359 RT1015 RT5682 audio codec.

diff --git a/sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c b/sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c
index 41d8a85..b7f42a5 100644 (file)
--- a/sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c
+++ b/sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c
@@ -540,7 +540,9 @@ SND_SOC_DAILINK_DEFS(playback_hdmi,
 SND_SOC_DAILINK_DEFS(primary_codec,
                     DAILINK_COMP_ARRAY(COMP_CPU("ADDA")),
                     DAILINK_COMP_ARRAY(COMP_CODEC("mt6359-sound",
-                                                  "mt6359-snd-codec-aif1")),
+                                                  "mt6359-snd-codec-aif1"),
+                                       COMP_CODEC("dmic-codec",
+                                                  "dmic-hifi")),
                     DAILINK_COMP_ARRAY(COMP_EMPTY()));
 
 SND_SOC_DAILINK_DEFS(primary_codec_ch34,