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ASoC: arizona: Implement stability check for LHPF coefficients

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Specifying unstable coefficients for the low/high pass filters can have
a severe impact on the audio. This patchs adds a stability check on the
coefficients written to the low/high pass filter block to prevent this.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Charles Keepax
2015-06-25 09:35:12 +01:00
committed by Mark Brown
parent c05d9a8c7f
commit 5f8e671a49
5 changed files with 38 additions and 12 deletions
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8
sound/soc/codecs/wm8997.c
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@@ -238,10 +238,10 @@ SOC_ENUM("LHPF2 Mode", arizona_lhpf2_mode),
SOC_ENUM("LHPF3 Mode", arizona_lhpf3_mode),
SOC_ENUM("LHPF4 Mode", arizona_lhpf4_mode),
SND_SOC_BYTES("LHPF1 Coefficients", ARIZONA_HPLPF1_2, 1),
SND_SOC_BYTES("LHPF2 Coefficients", ARIZONA_HPLPF2_2, 1),
SND_SOC_BYTES("LHPF3 Coefficients", ARIZONA_HPLPF3_2, 1),
SND_SOC_BYTES("LHPF4 Coefficients", ARIZONA_HPLPF4_2, 1),
ARIZONA_LHPF_CONTROL("LHPF1 Coefficients", ARIZONA_HPLPF1_2),
ARIZONA_LHPF_CONTROL("LHPF2 Coefficients", ARIZONA_HPLPF2_2),
ARIZONA_LHPF_CONTROL("LHPF3 Coefficients", ARIZONA_HPLPF3_2),
ARIZONA_LHPF_CONTROL("LHPF4 Coefficients", ARIZONA_HPLPF4_2),
SOC_ENUM("ISRC1 FSL", arizona_isrc_fsl[0]),
SOC_ENUM("ISRC2 FSL", arizona_isrc_fsl[1]),