The patch
ASoC: AMD: Reset bytescount when starting transaction
has been applied to the asoc tree at
https://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 1a337a1e7885085d224583c766614e5945bde671 Mon Sep 17 00:00:00 2001
From: Daniel Kurtz djkurtz@chromium.org Date: Mon, 2 Jul 2018 15:19:51 -0600 Subject: [PATCH] ASoC: AMD: Reset bytescount when starting transaction
The pointer() callback gets its value by reading the I2S BYTE_COUNT register. This is a 64-bit runnning transaction counter. If a transaction was aborted in the middle of a sample buffer, the counter will stop counting on a number divisible by the buffer size. Since we actually use it as a pointer into an aligned buffer, however, we do want to ensure that it always starts at a number divisible by the buffer size when starting a transaction, hence we reset it whenever starting a transaction.
To accomplish this, it wasn't necessary to zero bytescount at the termination of each transaction, so remove this unnecessary code.
Signed-off-by: Daniel Kurtz djkurtz@chromium.org Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/amd/acp-pcm-dma.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/sound/soc/amd/acp-pcm-dma.c b/sound/soc/amd/acp-pcm-dma.c index cd4d2520ac14..ab60129f4f26 100644 --- a/sound/soc/amd/acp-pcm-dma.c +++ b/sound/soc/amd/acp-pcm-dma.c @@ -1013,7 +1013,6 @@ static int acp_dma_prepare(struct snd_pcm_substream *substream) static int acp_dma_trigger(struct snd_pcm_substream *substream, int cmd) { int ret; - u64 bytescount = 0;
struct snd_pcm_runtime *runtime = substream->runtime; struct audio_substream_data *rtd = runtime->private_data; @@ -1024,9 +1023,7 @@ static int acp_dma_trigger(struct snd_pcm_substream *substream, int cmd) case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: case SNDRV_PCM_TRIGGER_RESUME: - bytescount = acp_get_byte_count(rtd); - if (rtd->bytescount == 0) - rtd->bytescount = bytescount; + rtd->bytescount = acp_get_byte_count(rtd); if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { acp_dma_start(rtd->acp_mmio, rtd->ch1); acp_dma_start(rtd->acp_mmio, rtd->ch2); @@ -1053,7 +1050,6 @@ static int acp_dma_trigger(struct snd_pcm_substream *substream, int cmd) case SNDRV_PCM_TRIGGER_SUSPEND: acp_dma_stop(rtd->acp_mmio, rtd->ch2); ret = acp_dma_stop(rtd->acp_mmio, rtd->ch1); - rtd->bytescount = 0; break; default: ret = -EINVAL;