ASoC: imx-pcm-dma-mx2: restart DMA after an error (671999cb) · Commits · 戴 / test

sound/soc/imx/imx-pcm-dma-mx2.c

+14 −1

Original line number	Diff line number	Diff line
		@@ -70,7 +70,12 @@ static void imx_ssi_dma_callback(int channel, void *data)

		static void snd_imx_dma_err_callback(int channel, void *data, int err)
		{
		pr_err("DMA error callback called\n");
		struct snd_pcm_substream *substream = data;
		struct snd_soc_pcm_runtime *rtd = substream->private_data;
		struct imx_pcm_dma_params *dma_params = rtd->dai->cpu_dai->dma_data;
		struct snd_pcm_runtime *runtime = substream->runtime;
		struct imx_pcm_runtime_data *iprtd = runtime->private_data;
		int ret;

		pr_err("DMA timeout on channel %d -%s%s%s%s\n",
		channel,
		@@ -78,6 +83,14 @@ static void snd_imx_dma_err_callback(int channel, void *data, int err)
		err & IMX_DMA_ERR_REQUEST ? " request" : "",
		err & IMX_DMA_ERR_TRANSFER ? " transfer" : "",
		err & IMX_DMA_ERR_BUFFER ? " buffer" : "");

		imx_dma_disable(iprtd->dma);
		ret = imx_dma_setup_sg(iprtd->dma, iprtd->sg_list, iprtd->sg_count,
		IMX_DMA_LENGTH_LOOP, dma_params->dma_addr,
		substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
		DMA_MODE_WRITE : DMA_MODE_READ);
		if (!ret)
		imx_dma_enable(iprtd->dma);
		}

		static int imx_ssi_dma_alloc(struct snd_pcm_substream *substream)