ASoC: qcom: Add support for playback recover after resume

To support playback continuation after hard suspend(bypass powerd)
and resume do regcache sync with component driver pm ops.

Signed-off-by: V Sujith Kumar Reddy <vsujithk@codeaurora.org>
Signed-off-by: Srinivasa Rao Mandadapu <srivasam@codeaurora.org>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Tested-by: Steev Klimaszewski <steev@kali.org>
Link: https://lore.kernel.org/r/1608192514-29695-3-git-send-email-srivasam@codeaurora.org
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/qcom/lpass-platform.c b/sound/soc/qcom/lpass-platform.c
index 232deee6fde56a43a902ff736f7d5ce247740a01..d1c248590f3ab6da7622dcf8d1909d74c340c88a 100644 (file)
--- a/sound/soc/qcom/lpass-platform.c
+++ b/sound/soc/qcom/lpass-platform.c
@@ -823,6 +823,39 @@ static void lpass_platform_pcm_free(struct snd_soc_component *component,
        }
 }
 
+static int lpass_platform_pcmops_suspend(struct snd_soc_component *component)
+{
+       struct lpass_data *drvdata = snd_soc_component_get_drvdata(component);
+       struct regmap *map;
+       unsigned int dai_id = component->id;
+
+       if (dai_id == LPASS_DP_RX)
+               map = drvdata->hdmiif_map;
+       else
+               map = drvdata->lpaif_map;
+
+       regcache_cache_only(map, true);
+       regcache_mark_dirty(map);
+
+       return 0;
+}
+
+static int lpass_platform_pcmops_resume(struct snd_soc_component *component)
+{
+       struct lpass_data *drvdata = snd_soc_component_get_drvdata(component);
+       struct regmap *map;
+       unsigned int dai_id = component->id;
+
+       if (dai_id == LPASS_DP_RX)
+               map = drvdata->hdmiif_map;
+       else
+               map = drvdata->lpaif_map;
+
+       regcache_cache_only(map, false);
+       return regcache_sync(map);
+}
+
+
 static const struct snd_soc_component_driver lpass_component_driver = {
        .name           = DRV_NAME,
        .open           = lpass_platform_pcmops_open,
@@ -835,6 +868,8 @@ static const struct snd_soc_component_driver lpass_component_driver = {
        .mmap           = lpass_platform_pcmops_mmap,
        .pcm_construct  = lpass_platform_pcm_new,
        .pcm_destruct   = lpass_platform_pcm_free,
+       .suspend                = lpass_platform_pcmops_suspend,
+       .resume                 = lpass_platform_pcmops_resume,
 
 };