From: Christoph Huber Date: Mon, 15 Aug 2016 16:59:25 +0000 (+0200) Subject: ASoC: atmel_ssc_dai: Don't unconditionally reset SSC on stream startup X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=3e103a65514c2947e53f3171b21255fbde8b60c6;p=linux-beck.git ASoC: atmel_ssc_dai: Don't unconditionally reset SSC on stream startup commit cbaadf0f90d6 ("ASoC: atmel_ssc_dai: refactor the startup and shutdown") refactored code such that the SSC is reset on every startup; this breaks duplex audio (e.g. first start audio playback, then start record, causing the playback to stop/hang) Fixes: cbaadf0f90d6 (ASoC: atmel_ssc_dai: refactor the startup and shutdown) Signed-off-by: Christoph Huber Signed-off-by: Peter Meerwald-Stadler Signed-off-by: Mark Brown Cc: stable@vger.kernel.org --- diff --git a/sound/soc/atmel/atmel_ssc_dai.c b/sound/soc/atmel/atmel_ssc_dai.c index 54c09acd3fed..16e459aedffe 100644 --- a/sound/soc/atmel/atmel_ssc_dai.c +++ b/sound/soc/atmel/atmel_ssc_dai.c @@ -299,8 +299,9 @@ static int atmel_ssc_startup(struct snd_pcm_substream *substream, clk_enable(ssc_p->ssc->clk); ssc_p->mck_rate = clk_get_rate(ssc_p->ssc->clk); - /* Reset the SSC to keep it at a clean status */ - ssc_writel(ssc_p->ssc->regs, CR, SSC_BIT(CR_SWRST)); + /* Reset the SSC unless initialized to keep it in a clean state */ + if (!ssc_p->initialized) + ssc_writel(ssc_p->ssc->regs, CR, SSC_BIT(CR_SWRST)); if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { dir = 0;