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| author | Peter Ujfalusi <peter.ujfalusi@linux.intel.com> | 2024-07-04 11:01:06 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-07-04 13:09:11 +0200 |
| commit | 82bb8db96610b558920b8c57cd250ec90567d79b (patch) | |
| tree | e0692e79c4152b1b348d9c45a855ab4dcb6cf967 /sound | |
| parent | ASoC: rt711-sdw: add missing readable registers (diff) | |
| download | linux-82bb8db96610b558920b8c57cd250ec90567d79b.tar.xz linux-82bb8db96610b558920b8c57cd250ec90567d79b.zip | |
ASoC: SOF: Intel: hda-pcm: Limit the maximum number of periods by MAX_BDL_ENTRIES
The HDaudio specification Section 3.6.2 limits the number of BDL entries to 256.
Make sure we don't allow more periods than this normative value.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://patch.msgid.link/20240704090106.371497-1-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/sof/intel/hda-pcm.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sound/soc/sof/intel/hda-pcm.c b/sound/soc/sof/intel/hda-pcm.c index 9fb8521b896b..f6e24edd7adb 100644 --- a/sound/soc/sof/intel/hda-pcm.c +++ b/sound/soc/sof/intel/hda-pcm.c @@ -258,6 +258,12 @@ int hda_dsp_pcm_open(struct snd_sof_dev *sdev, snd_pcm_hw_constraint_integer(substream->runtime, SNDRV_PCM_HW_PARAM_PERIODS); + /* Limit the maximum number of periods to not exceed the BDL entries count */ + if (runtime->hw.periods_max > HDA_DSP_MAX_BDL_ENTRIES) + snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, + runtime->hw.periods_min, + HDA_DSP_MAX_BDL_ENTRIES); + /* Only S16 and S32 supported by HDA hardware when used without DSP */ if (sdev->dspless_mode_selected) snd_pcm_hw_constraint_mask64(substream->runtime, SNDRV_PCM_HW_PARAM_FORMAT, |