ASoC: soc-pcm: fix hwparams min/max init for dpcm

When runtime is initialized with dpcm_init_runtime_hw(), some of the
min/max calculations assume that defaults are set. For example
calculation of channel min/max values may be done using zero-initialized
data and soc_pcm_hw_update_chan() will always return max-channels of 0
in this case. This will result in failure to open the PCM at all.

Fix the issue by calling soc_pcm_hw_init() before calling any
soc_pcm_hw_update_*() functions.

Remove the conditional code on runtime->hw.formats as this field
is anyways set in soc_pcm_hw_init().

Fixes: 6cb56a4549 ("ASoC: soc-pcm: add soc_pcm_hw_update_chan()")
Reported-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20210214220414.2876690-1-kai.vehmanen@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-pcm.c

@@ -1531,12 +1531,10 @@ static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
 {
 	struct snd_pcm_hardware *hw = &runtime->hw;
 
+	soc_pcm_hw_init(hw);
 	soc_pcm_hw_update_rate(hw, stream);
 	soc_pcm_hw_update_chan(hw, stream);
-	if (runtime->hw.formats)
-		runtime->hw.formats &= stream->formats;
-	else
-		runtime->hw.formats = stream->formats;
+	soc_pcm_hw_update_format(hw, stream);
 }
 
 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,