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ASoC: wm_adsp: Ensure ADSP2 DMAs are quiesced when DSP is halted

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Maximise robustness for the widest range of firmwares by ensuring the DSP
is in a consistent state when halted.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2013-01-28 20:18:17 +08:00
parent a4cdbec758
commit 2d30b5751d
1 changed files with 11 additions and 3 deletions
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14
sound/soc/codecs/wm_adsp.c
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@ -103,9 +103,12 @@
#define ADSP1_START_SHIFT 0 /* DSP1_START */
#define ADSP1_START_WIDTH 1 /* DSP1_START */
#define ADSP2_CONTROL 0
#define ADSP2_CLOCKING 1
#define ADSP2_STATUS1 4
#define ADSP2_CONTROL 0x0
#define ADSP2_CLOCKING 0x1
#define ADSP2_STATUS1 0x4
#define ADSP2_WDMA_CONFIG_1 0x30
#define ADSP2_WDMA_CONFIG_2 0x31
#define ADSP2_RDMA_CONFIG_1 0x34
/*
* ADSP2 Control
@ -642,6 +645,11 @@ int wm_adsp2_event(struct snd_soc_dapm_widget *w,
ADSP2_SYS_ENA | ADSP2_CORE_ENA |
ADSP2_START, 0);
/* Make sure DMAs are quiesced */
regmap_write(dsp->regmap, dsp->base + ADSP2_WDMA_CONFIG_1, 0);
regmap_write(dsp->regmap, dsp->base + ADSP2_WDMA_CONFIG_2, 0);
regmap_write(dsp->regmap, dsp->base + ADSP2_RDMA_CONFIG_1, 0);
if (dsp->dvfs) {
ret = regulator_set_voltage(dsp->dvfs, 1200000,
1800000);