The patch
ASoC: rsnd: add detail explanation of L/R conversion timing
has been applied to the asoc tree at
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying to this mail.
Thanks, Mark
From 8cce431aa26ef24a4d4b820301ac73bf55df7a5e Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto kuninori.morimoto.gx@renesas.com Date: Fri, 9 Jun 2017 00:34:09 +0000 Subject: [PATCH] ASoC: rsnd: add detail explanation of L/R conversion timing
Renesas Sound device *Hardware* L/R and Linux *Software* L/R are inverted. Because of this background, it needs to convert L/R. Then, DVC needs *Hardware* L/R, and Linux needs *Software* L/R. Because Playback/Capture needs different timing, and there is no explanation about it on source code / git log, this patch adds it.
Signed-off-by: Kuninori Morimoto kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/sh/rcar/core.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/sound/soc/sh/rcar/core.c b/sound/soc/sh/rcar/core.c index 7c68f9d4a0ed..1bf261d677b7 100644 --- a/sound/soc/sh/rcar/core.c +++ b/sound/soc/sh/rcar/core.c @@ -310,6 +310,24 @@ u32 rsnd_get_dalign(struct rsnd_mod *mod, struct rsnd_dai_stream *io) u32 val = 0x76543210; u32 mask = ~0;
+ /* + * *Hardware* L/R and *Software* L/R are inverted. + * 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 + * + * sL/R : software L/R + * hL/R : hardware L/R + * (*) : conversion timing + * + * Playback + * sL/R (*) hL/R hL/R hL/R hL/R hL/R + * [MEM] -> [SRC] -> [DVC] -> [CMD] -> [SSIU] -> [SSI] -> codec + * + * Capture + * hL/R hL/R hL/R hL/R hL/R (*) sL/R + * codec -> [SSI] -> [SSIU] -> [SRC] -> [DVC] -> [CMD] -> [MEM] + */ if (rsnd_io_is_play(io)) { struct rsnd_mod *src = rsnd_io_to_mod_src(io);