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| author | Zhu Yingjiang <yingjiang.zhu@linux.intel.com> | 2019-06-12 19:23:46 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-06-17 14:46:01 +0200 |
| commit | 7bcaf0f2cdfacca2226eee8895f64bc019d5a8be (patch) | |
| tree | 84eac7972a92d3304043a78d5c3a657d7b810c54 /sound/soc/sof/intel/hda-stream.c | |
| parent | ASoC: SOF: Intel: hda: clear stream status and wakests properly (diff) | |
| download | linux-7bcaf0f2cdfacca2226eee8895f64bc019d5a8be.tar.xz linux-7bcaf0f2cdfacca2226eee8895f64bc019d5a8be.zip | |
ASoC: SOF: Intel: hda: make sure DMA is start/stop by read the RUN bit
As per the HW recommendation, after setting the RUN bit
(start as 1, stop as 0), software must read the bit back
to make sure the bit is set right, before modifying related
control registers/re-starting the DMA engine.
Signed-off-by: Zhu Yingjiang <yingjiang.zhu@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/sof/intel/hda-stream.c')
| -rw-r--r-- | sound/soc/sof/intel/hda-stream.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/sound/soc/sof/intel/hda-stream.c b/sound/soc/sof/intel/hda-stream.c index 23cff5aca007..13d114993f96 100644 --- a/sound/soc/sof/intel/hda-stream.c +++ b/sound/soc/sof/intel/hda-stream.c @@ -217,6 +217,9 @@ int hda_dsp_stream_trigger(struct snd_sof_dev *sdev, { struct hdac_stream *hstream = &stream->hstream; int sd_offset = SOF_STREAM_SD_OFFSET(hstream); + u32 dma_start = SOF_HDA_SD_CTL_DMA_START; + int ret; + u32 run; /* cmd must be for audio stream */ switch (cmd) { @@ -234,6 +237,16 @@ int hda_dsp_stream_trigger(struct snd_sof_dev *sdev, SOF_HDA_SD_CTL_DMA_START | SOF_HDA_CL_DMA_SD_INT_MASK); + ret = snd_sof_dsp_read_poll_timeout(sdev, + HDA_DSP_HDA_BAR, + sd_offset, run, + ((run & dma_start) == dma_start), + HDA_DSP_REG_POLL_INTERVAL_US, + HDA_DSP_STREAM_RUN_TIMEOUT); + + if (ret) + return ret; + hstream->running = true; break; case SNDRV_PCM_TRIGGER_SUSPEND: @@ -244,6 +257,15 @@ int hda_dsp_stream_trigger(struct snd_sof_dev *sdev, SOF_HDA_SD_CTL_DMA_START | SOF_HDA_CL_DMA_SD_INT_MASK, 0x0); + ret = snd_sof_dsp_read_poll_timeout(sdev, HDA_DSP_HDA_BAR, + sd_offset, run, + !(run & dma_start), + HDA_DSP_REG_POLL_INTERVAL_US, + HDA_DSP_STREAM_RUN_TIMEOUT); + + if (ret) + return ret; + snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR, sd_offset + SOF_HDA_ADSP_REG_CL_SD_STS, SOF_HDA_CL_DMA_SD_INT_MASK); |