Between when we load the DSP and when it actually starts running put the core into a lower power state where the memory is retained but nothing is clocked.
Signed-off-by: Charles Keepax ckeepax@opensource.wolfsonmicro.com ---
Changes since v1: - Reuse wm_adsp2_ena when bringing the DSP back out of the low power state such that we wait for RAM ready again.
sound/soc/codecs/wm_adsp.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c index 4188c37..446f029 100644 --- a/sound/soc/codecs/wm_adsp.c +++ b/sound/soc/codecs/wm_adsp.c @@ -2259,6 +2259,11 @@ static void wm_adsp2_boot_work(struct work_struct *work)
mutex_lock(&dsp->pwr_lock);
+ ret = regmap_update_bits(dsp->regmap, dsp->base + ADSP2_CONTROL, + ADSP2_MEM_ENA, ADSP2_MEM_ENA); + if (ret != 0) + goto err_mutex; + ret = wm_adsp2_ena(dsp); if (ret != 0) goto err_mutex; @@ -2282,6 +2287,12 @@ static void wm_adsp2_boot_work(struct work_struct *work)
dsp->booted = true;
+ /* Turn DSP back off until we are ready to run */ + ret = regmap_update_bits(dsp->regmap, dsp->base + ADSP2_CONTROL, + ADSP2_SYS_ENA, 0); + if (ret != 0) + goto err_ena; + mutex_unlock(&dsp->pwr_lock);
return; @@ -2344,6 +2355,10 @@ int wm_adsp2_event(struct snd_soc_dapm_widget *w, if (!dsp->booted) return -EIO;
+ ret = wm_adsp2_ena(dsp); + if (ret != 0) + goto err; + /* Sync set controls */ ret = wm_coeff_sync_controls(dsp); if (ret != 0) @@ -2382,7 +2397,8 @@ int wm_adsp2_event(struct snd_soc_dapm_widget *w, dsp->booted = false;
regmap_update_bits(dsp->regmap, dsp->base + ADSP2_CONTROL, - ADSP2_CORE_ENA | ADSP2_START, 0); + ADSP2_MEM_ENA | ADSP2_CORE_ENA | ADSP2_START, + 0);
/* Make sure DMAs are quiesced */ regmap_write(dsp->regmap, dsp->base + ADSP2_RDMA_CONFIG_1, 0);