[PATCH 5/5] ASoC: soc-pcm: fixup snd_pcm_limit_hw_rates() timing

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>

soc-pcm has snd_pcm_limit_hw_rates() which determine rate_min/rate_max.
It updates runtime->hw.rate_min/max (A) based on hw->rates (B).

	int snd_pcm_limit_hw_rates(...)
	{
		int i;
		for (...) {
(B)			if (runtime->hw.rates & (1 << i)) {
(A)				runtime->hw.rate_min = ...
				break;
			}
		}
		for (...) {
(B)			if (runtime->hw.rates & (1 << i)) {
(A)				runtime->hw.rate_max = ...
				break;
			}
		}
		return 0;
	}

This means, setup order is

	1) set hw->rates
	2) call snd_pcm_limit_hw_rates()
	3) update hw->rate_min/max

soc_pcm_init_runtime_hw() is calling it in good order

	static void soc_pcm_init_runtime_hw(xxx)
	{
		...
1)		hw->rates = snd_pcm_rate_mask_intersect(...);

2)		snd_pcm_limit_hw_rates(...);

3)		hw->rate_min = max(...);
		hw->rate_min = max(...);
		hw->rate_max = min_not_zero(...);
		hw->rate_max = min_not_zero(...);
	}

But, dpcm_fe_dai_startup() is not.

	static int dpcm_fe_dai_startup(xxx)
	{
		...
1) 3)		dpcm_set_fe_runtime(...);
2)		snd_pcm_limit_hw_rates(...);
		...
	}

More detail of dpcm_set_fe_runtime() is

	static void dpcm_set_fe_runtime()
	{
		...
		for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
			...

3) 1)			dpcm_init_runtime_hw(...);
		}
		...
3) 1)		dpcm_runtime_merge_rate(...);
	}

This patch fixup these into

	static void dpcm_set_fe_runtime()
	{
		...
		for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
			...

1) 2) 3)		dpcm_init_runtime_hw(...);
		}
		...
1) 2) 3)	dpcm_runtime_merge_rate(...);
	}

	static int dpcm_fe_dai_startup(xxx)
	{
		...
		dpcm_set_fe_runtime(...);
-		snd_pcm_limit_hw_rates(...);
		...
	}

Link: https://lore.kernel.org/r/87k15l7ewd.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
---
 sound/soc/soc-pcm.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 2a625ce0bacb..b79f064887d4 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -1514,6 +1514,10 @@ int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
 				 struct snd_soc_pcm_stream *stream)
 {
+	runtime->hw.rates = stream->rates;
+
+	snd_pcm_limit_hw_rates(runtime);
+
 	runtime->hw.rate_min = stream->rate_min;
 	runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
 	runtime->hw.channels_min = stream->channels_min;
@@ -1522,7 +1526,6 @@ static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
 		runtime->hw.formats &= stream->formats;
 	else
 		runtime->hw.formats = stream->formats;
-	runtime->hw.rates = stream->rates;
 }
 
 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
@@ -1648,9 +1651,12 @@ static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
 
 			pcm = snd_soc_dai_get_pcm_stream(dai, stream);
 
+			hw->rates = snd_pcm_rate_mask_intersect(hw->rates, pcm->rates);
+
+			snd_pcm_limit_hw_rates(runtime);
+
 			hw->rate_min = max(hw->rate_min, pcm->rate_min);
 			hw->rate_max = min_not_zero(hw->rate_max, pcm->rate_max);
-			hw->rates = snd_pcm_rate_mask_intersect(hw->rates, pcm->rates);
 		}
 	}
 }
@@ -1738,7 +1744,6 @@ static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
 {
 	struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
-	struct snd_pcm_runtime *runtime = fe_substream->runtime;
 	int stream = fe_substream->stream, ret = 0;
 
 	dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
@@ -1761,7 +1766,6 @@ static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
 	fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
 
 	dpcm_set_fe_runtime(fe_substream);
-	snd_pcm_limit_hw_rates(runtime);
 
 	ret = dpcm_apply_symmetry(fe_substream, stream);
 	if (ret < 0)
-- 
2.25.1