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ASoC: rsnd: more clear rsnd_get_dalign() for DALIGN

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On Renesas sound device, DALIGN which exchanges channel position
is needed because SW and HW are using defferent data order if
16bit data. It is not needed when 24bit data.
rsnd_get_dalign() returns necessary value, but it was confusable
code. This patch makes it more simple.

Tested-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kuninori Morimoto 2017-12-08 06:23:11 +00:00 committed by Mark Brown
parent 2e2d53da81
commit a914e44693
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GPG Key ID: 24D68B725D5487D0
1 changed files with 10 additions and 23 deletions
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33
sound/soc/sh/rcar/core.c
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@ -294,11 +294,12 @@ u32 rsnd_get_dalign(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io);
struct rsnd_mod *target;
struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
u32 val = 0x76543210;
u32 mask = ~0;
/*
* *Hardware* L/R and *Software* L/R are inverted.
* *Hardware* L/R and *Software* L/R are inverted for 16bit data.
* 31..16 15...0
* HW: [L ch] [R ch]
* SW: [R ch] [L ch]
* We need to care about inversion timing to control
* Playback/Capture correctly.
* The point is [DVC] needs *Hardware* L/R, [MEM] needs *Software* L/R
@ -325,27 +326,13 @@ u32 rsnd_get_dalign(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
target = cmd ? cmd : ssiu;
}
mask <<= runtime->channels * 4;
val = val & mask;
switch (runtime->sample_bits) {
case 16:
val |= 0x67452301 & ~mask;
break;
case 32:
val |= 0x76543210 & ~mask;
break;
}
/*
* exchange channeles on SRC if possible,
* otherwise, R/L volume settings on DVC
* changes inverted channels
*/
if (mod == target)
return val;
else
/* Non target mod or 24bit data needs normal DALIGN */
if ((runtime->sample_bits != 16) ||
(mod != target))
return 0x76543210;
/* Target mod needs inverted DALIGN when 16bit */
else
return 0x67452301;
}
u32 rsnd_get_busif_shift(struct rsnd_dai_stream *io, struct rsnd_mod *mod)