ASoC: wm_adsp: Put DSP into low power state between loading and running

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>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index 4188c37..446f029 100644 (file)
--- 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);