In the case a device can support retaining the firmware memory across low power states it is useful for the preloader widget to only power up whilst actually loading/unloading the core, as opposed to the normal operation where the widget is powered for the entire time a firmware is preloaded onto the core. Add support for this mode and a flag to enable it.
Signed-off-by: Charles Keepax ckeepax@opensource.cirrus.com --- sound/soc/codecs/wm_adsp.c | 14 +++++++++++--- sound/soc/codecs/wm_adsp.h | 8 ++++++++ 2 files changed, 19 insertions(+), 3 deletions(-)
diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c index c3112bf238666..f3672e3d1703e 100644 --- a/sound/soc/codecs/wm_adsp.c +++ b/sound/soc/codecs/wm_adsp.c @@ -896,11 +896,12 @@ int wm_adsp2_preloader_put(struct snd_kcontrol *kcontrol, struct wm_adsp *dsp = &dsps[mc->shift - 1]; char preload[32];
- snprintf(preload, ARRAY_SIZE(preload), "%s Preload", dsp->cs_dsp.name); + if (dsp->preloaded == ucontrol->value.integer.value[0]) + return 0;
- dsp->preloaded = ucontrol->value.integer.value[0]; + snprintf(preload, ARRAY_SIZE(preload), "%s Preload", dsp->cs_dsp.name);
- if (ucontrol->value.integer.value[0]) + if (ucontrol->value.integer.value[0] || dsp->toggle_preload) snd_soc_component_force_enable_pin(component, preload); else snd_soc_component_disable_pin(component, preload); @@ -909,6 +910,13 @@ int wm_adsp2_preloader_put(struct snd_kcontrol *kcontrol,
flush_work(&dsp->boot_work);
+ dsp->preloaded = ucontrol->value.integer.value[0]; + + if (dsp->toggle_preload) { + snd_soc_component_disable_pin(component, preload); + snd_soc_dapm_sync(dapm); + } + return 0; } EXPORT_SYMBOL_GPL(wm_adsp2_preloader_put); diff --git a/sound/soc/codecs/wm_adsp.h b/sound/soc/codecs/wm_adsp.h index 0e2f113bd3422..7f4fabbc6ad3a 100644 --- a/sound/soc/codecs/wm_adsp.h +++ b/sound/soc/codecs/wm_adsp.h @@ -41,6 +41,14 @@ struct wm_adsp {
struct list_head compr_list; struct list_head buffer_list; + + /* + * Flag indicating the preloader widget only needs power toggled + * on state change rather than held on for the duration of the + * preload, useful for devices that can retain firmware memory + * across power down. + */ + bool toggle_preload; };
#define WM_ADSP1(wname, num) \