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6053a840f7
dpcm_init_runtime_hw() (= A) is used from dpcm_set_fe_runtime() (= B)
with for_each_rtd_cpu_dais() loop (= C), and it checks formats (= D).
(A) static void dpcm_init_runtime_hw(...)
{
...
^ if (runtime->hw.formats)
| (D1) runtime->hw.formats &= stream->formats;
(D) else
| (D2) runtime->hw.formats = stream->formats;
v }
(B) static void dpcm_set_fe_runtime(...)
{
...
(C) for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
...
(A) dpcm_init_runtime_hw(...);
}
}
If this for_each_rtd_cpu_dais() loop (= C) calls
dpcm_init_runtime_hw() (= A) multiple times, this means it is Multi-CPU.
If we focus to format operation at (D), using mask (= D1) is understandable
because it restricts unsupported format.
But, enabling format when zero format case (= D2) is very strange,
because it might enables unsupported format.
This runtime->hw.formats is initialized by ULLONG_MAX at soc_pcm_hw_init(),
thus becoming zero format means it can't use such format.
And doing this strange format operation is only here.
This patch removes strange format operation (= D2), and use standard
soc_pcm_hw_update_format() for it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87sg5pvshq.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.