Commit 765ae7c8 authored Jan 15, 2015 by Kuninori Morimoto Committed by Mark Brown Jan 15, 2015

ASoC: rsnd: ignore DIRQ when DMA transfer



SSI interrupt handler of R-Car sound driver will be called
when DIRQ (= Data read/write timing for PIO) or
UIRQ / OIRQ (= under/over run error).
DIRQ "interrupt" doesn't occur when DMA transfer, but then,
DIRQ "status bit" might occur. we need to ignore this DIRQ
operation when DMA. Otherwise, driver will push/pop as PIO.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

parent 337b0b4c

sound/soc/sh/rcar/ssi.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -384,13 +384,14 @@ static irqreturn_t rsnd_ssi_interrupt(int irq, void *data)
		struct rsnd_mod *mod = &ssi->mod;
		struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
		struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
		int is_dma = rsnd_ssi_is_dma_mode(mod);
		u32 status = rsnd_mod_read(mod, SSISR);

		if (!io)
		return IRQ_NONE;

		/* PIO only */
		if (status & DIRQ) {
		if (!is_dma && (status & DIRQ)) {
		struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
		u32 buf = (u32 )(runtime->dma_area +
		rsnd_dai_pointer_offset(io, 0));