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ASoC: soc-pcm: Shrink stack frame for __soc_pcm_hw_params

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Commit ac950278b0 ("ASoC: add N cpus to M codecs dai link support")
added an additional local params in __soc_pcm_hw_params, for the CPU
side of the DAI. The snd_pcm_hw_params struct is pretty large (604
bytes) and keeping two local copies of it can make the stack frame
really large.

It is worth noting the variables are in separate code blocks so for
some optimisation levels in the compiler these will get automatically
combined keeping the stack frame reasonable. But better to manually
combine them to cover all cases.

Add a single local variable for __soc_pcm_hw_params and use in both
loops to shrink the stack frame.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230908085920.2906359-1-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Charles Keepax 2023-09-08 09:59:20 +01:00 committed by Mark Brown
parent d7e47e3219
commit 396b907919
No known key found for this signature in database
GPG key ID: 24D68B725D5487D0
1 changed files with 11 additions and 12 deletions
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23
sound/soc/soc-pcm.c
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@ -985,6 +985,7 @@ static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd,
{
struct snd_soc_dai *cpu_dai;
struct snd_soc_dai *codec_dai;
struct snd_pcm_hw_params tmp_params;
int i, ret = 0;
snd_soc_dpcm_mutex_assert_held(rtd);
@ -998,7 +999,6 @@ static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd,
goto out;
for_each_rtd_codec_dais(rtd, i, codec_dai) {
struct snd_pcm_hw_params codec_params;
unsigned int tdm_mask = snd_soc_dai_tdm_mask_get(codec_dai, substream->stream);
/*
@ -1019,23 +1019,22 @@ static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd,
continue;
/* copy params for each codec */
codec_params = *params;
tmp_params = *params;
/* fixup params based on TDM slot masks */
if (tdm_mask)
soc_pcm_codec_params_fixup(&codec_params, tdm_mask);
soc_pcm_codec_params_fixup(&tmp_params, tdm_mask);
ret = snd_soc_dai_hw_params(codec_dai, substream,
&codec_params);
&tmp_params);
if(ret < 0)
goto out;
soc_pcm_set_dai_params(codec_dai, &codec_params);
snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
soc_pcm_set_dai_params(codec_dai, &tmp_params);
snd_soc_dapm_update_dai(substream, &tmp_params, codec_dai);
}
for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
struct snd_pcm_hw_params cpu_params;
unsigned int ch_mask = 0;
int j;
@ -1047,7 +1046,7 @@ static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd,
continue;
/* copy params for each cpu */
cpu_params = *params;
tmp_params = *params;
if (!rtd->dai_link->codec_ch_maps)
goto hw_params;
@ -1062,16 +1061,16 @@ static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd,
/* fixup cpu channel number */
if (ch_mask)
soc_pcm_codec_params_fixup(&cpu_params, ch_mask);
soc_pcm_codec_params_fixup(&tmp_params, ch_mask);
hw_params:
ret = snd_soc_dai_hw_params(cpu_dai, substream, &cpu_params);
ret = snd_soc_dai_hw_params(cpu_dai, substream, &tmp_params);
if (ret < 0)
goto out;
/* store the parameters for each DAI */
soc_pcm_set_dai_params(cpu_dai, &cpu_params);
snd_soc_dapm_update_dai(substream, &cpu_params, cpu_dai);
soc_pcm_set_dai_params(cpu_dai, &tmp_params);
snd_soc_dapm_update_dai(substream, &tmp_params, cpu_dai);
}
ret = snd_soc_pcm_component_hw_params(substream, params);