diff options
| author | Zhu Yingjiang <yingjiang.zhu@linux.intel.com> | 2019-06-12 12:23:46 -0500 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-06-17 13:46:01 +0100 |
| commit | 7bcaf0f2cdfacca2226eee8895f64bc019d5a8be (patch) | |
| tree | 84eac7972a92d3304043a78d5c3a657d7b810c54 /sound/soc/sof/intel/hda.h | |
| parent | 3a39e0eae80919a15831f66324d4530454b4f495 (diff) | |
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.h')
| -rw-r--r-- | sound/soc/sof/intel/hda.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sound/soc/sof/intel/hda.h b/sound/soc/sof/intel/hda.h index 50653859e0a0..73d7cc08afc2 100644 --- a/sound/soc/sof/intel/hda.h +++ b/sound/soc/sof/intel/hda.h @@ -159,6 +159,12 @@ #define HDA_DSP_MBOX_UPLINK_OFFSET 0x81000 #define HDA_DSP_STREAM_RESET_TIMEOUT 300 +/* + * Timeout in us, for setting the stream RUN bit, during + * start/stop the stream. The timeout expires if new RUN bit + * value cannot be read back within the specified time. + */ +#define HDA_DSP_STREAM_RUN_TIMEOUT 300 #define HDA_DSP_CL_TRIGGER_TIMEOUT 300 #define HDA_DSP_SPIB_ENABLE 1 |