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dd5abc7834
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@renesas.com>
Link: https://lore.kernel.org/r/8735ytaig8.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
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In order to build the documentation, use ``make htmldocs`` or
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There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
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requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.