diff options
| author | Cezary Rojewski <cezary.rojewski@intel.com> | 2019-06-13 21:04:32 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-06-25 16:33:39 +0200 |
| commit | 078759399ff74e2e6f5e208c61924d1b7d66e5d8 (patch) | |
| tree | 51e7b070bfea1ca24354a9bc75aacb880a043ffb /sound/soc/intel/skylake/cnl-sst.c | |
| parent | ASoC: topology: Consolidate and fix asoc_tplg_dapm_widget_*_create flow (diff) | |
| download | linux-078759399ff74e2e6f5e208c61924d1b7d66e5d8.tar.xz linux-078759399ff74e2e6f5e208c61924d1b7d66e5d8.zip | |
ASoC: Intel: Skylake: Read HIPCT extension before clearing DONE bit
Host clears DONE bit to signal IPC target it has completed the
operation. Once this is done, IPC target i.e. DSP may proceed with the
next reply, filling registers with new portion of data.
Because of this, host should always read all registers prior to clearing
DONE and BUSY bits to ensure no desynchronization happens the time in
between clearing bits and reading message data (here, extension).
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/intel/skylake/cnl-sst.c')
| -rw-r--r-- | sound/soc/intel/skylake/cnl-sst.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/soc/intel/skylake/cnl-sst.c b/sound/soc/intel/skylake/cnl-sst.c index 245df1067ba8..759ea59615ca 100644 --- a/sound/soc/intel/skylake/cnl-sst.c +++ b/sound/soc/intel/skylake/cnl-sst.c @@ -313,6 +313,7 @@ static irqreturn_t cnl_dsp_irq_thread_handler(int irq, void *context) hipcida = sst_dsp_shim_read_unlocked(dsp, CNL_ADSP_REG_HIPCIDA); hipctdr = sst_dsp_shim_read_unlocked(dsp, CNL_ADSP_REG_HIPCTDR); + hipctdd = sst_dsp_shim_read_unlocked(dsp, CNL_ADSP_REG_HIPCTDD); /* reply message from dsp */ if (hipcida & CNL_ADSP_REG_HIPCIDA_DONE) { @@ -332,7 +333,6 @@ static irqreturn_t cnl_dsp_irq_thread_handler(int irq, void *context) /* new message from dsp */ if (hipctdr & CNL_ADSP_REG_HIPCTDR_BUSY) { - hipctdd = sst_dsp_shim_read_unlocked(dsp, CNL_ADSP_REG_HIPCTDD); header.primary = hipctdr; header.extension = hipctdd; dev_dbg(dsp->dev, "IPC irq: Firmware respond primary:%x", |