ASoC: core: Add card mutex locking subclasses

This is the first part of a change that is intended to improve
ASoC locking protection for DAPM and PCM operations.

This part of the series adds a mutex class for the soc_card mutex. The
SND_SOC_CARD_CLASS_INIT class is used for card initialisation only whilst the
SND_SOC_CARD_CLASS_PCM class is used for the forth coming Dynamic
PCM operations. The new mutex classes are required otherwise we will see a false
positive mutex deadlock warning between the card initialisation and the PCM
operations (something that would never deadlock in real life).

Signed-off-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 2ebf7877c148..70de2f82e872 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -288,6 +288,11 @@ enum snd_soc_pcm_subclass {
         SND_SOC_PCM_CLASS_BE    = 1,
 };
 
+enum snd_soc_card_subclass {
+        SND_SOC_CARD_CLASS_INIT = 0,
+        SND_SOC_CARD_CLASS_PCM  = 1,
+};
+
 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
                              int source, unsigned int freq, int dir);
 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,