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ASoC: rsnd: SSI parent cares SWSP bit 

SSICR has SWSP bit (= Serial WS Polarity) which decides WS pin 1st
channel polarity (low or hi). This bit shouldn't exchange after running.

Current SSI "parent" doesn't care SSICR, just controls clock only.
Because of this behavior, if platform uses SSI0 as playback,
SSI1 as capture, and if user starts capture -> playback order,
SSI0 SSICR::SWSP bit exchanged 0 -> 1 during captureing, and it makes
capture noise.
This patch cares SSICR on SSI parent, too.
Special thanks to Yokoyama-san

Reported-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kuninori Morimoto 2018-06-12 05:52:17 +00:00 committed by Mark Brown
parent 7cc90a5cad
commit 203cdf51f2
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 21 additions and 11 deletions
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32
sound/soc/sh/rcar/ssi.c
View File

@ -37,6 +37,7 @@
#define CHNL_4 (1 << 22) /* Channels */
#define CHNL_6 (2 << 22) /* Channels */
#define CHNL_8 (3 << 22) /* Channels */
#define DWL_MASK (7 << 19) /* Data Word Length mask */
#define DWL_8 (0 << 19) /* Data Word Length */
#define DWL_16 (1 << 19) /* Data Word Length */
#define DWL_18 (2 << 19) /* Data Word Length */
@ -353,21 +354,18 @@ static void rsnd_ssi_config_init(struct rsnd_mod *mod,
struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
u32 cr_own;
u32 cr_mode;
u32 wsr;
u32 cr_own = ssi->cr_own;
u32 cr_mode = ssi->cr_mode;
u32 wsr = ssi->wsr;
int is_tdm;
if (rsnd_ssi_is_parent(mod, io))
return;
is_tdm = rsnd_runtime_is_ssi_tdm(io);
/*
* always use 32bit system word.
* see also rsnd_ssi_master_clk_enable()
*/
cr_own = FORCE | SWL_32;
cr_own |= FORCE | SWL_32;
if (rdai->bit_clk_inv)
cr_own |= SCKP;
@ -377,9 +375,18 @@ static void rsnd_ssi_config_init(struct rsnd_mod *mod,
cr_own |= SDTA;
if (rdai->sys_delay)
cr_own |= DEL;
/*
* We shouldn't exchange SWSP after running.
* This means, parent needs to care it.
*/
if (rsnd_ssi_is_parent(mod, io))
goto init_end;
if (rsnd_io_is_play(io))
cr_own |= TRMD;
cr_own &= ~DWL_MASK;
switch (snd_pcm_format_width(runtime->format)) {
case 16:
cr_own |= DWL_16;
@ -406,7 +413,7 @@ static void rsnd_ssi_config_init(struct rsnd_mod *mod,
wsr |= WS_MODE;
cr_own |= CHNL_8;
}
init_end:
ssi->cr_own = cr_own;
ssi->cr_mode = cr_mode;
ssi->wsr = wsr;
@ -470,15 +477,18 @@ static int rsnd_ssi_quit(struct rsnd_mod *mod,
return -EIO;
}
if (!rsnd_ssi_is_parent(mod, io))
ssi->cr_own = 0;
rsnd_ssi_master_clk_stop(mod, io);
rsnd_mod_power_off(mod);
ssi->usrcnt--;
if (!ssi->usrcnt) {
ssi->cr_own = 0;
ssi->cr_mode = 0;
ssi->wsr = 0;
}
return 0;
}