The settling time of DMIC DC level is both platform and used microphone model specific. The unmute gain ramp is used to conceal most of the large DC level seen in beginning of capture. This patch adds into the DMIC DAI IPC struct a new field called unmute_ramp_time and a new token SOF_TKN_INTEL_DMIC_UNMUTE_RAMP_TIME. The value is the ramp length in milliseconds (ms). The ABI minor version is incremented for this backwards compatible change.
Showing the changes to include/uapi/sound/sof (2 of 4 files). Show all
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| @@ -26,7 +26,7 @@ · 25 unmodified lines | |||
| 26 | 26 | ||
| 27 | /* SOF ABI version major, minor and patch numbers */ | 27 | /* SOF ABI version major, minor and patch numbers */ |
| 28 | #define SOF_ABI_MAJOR 3 | 28 | #define SOF_ABI_MAJOR 3 |
| 29 | #define SOF_ABI_MINOR 7 | 29 | #define SOF_ABI_MINOR 8 |
| 30 | #define SOF_ABI_PATCH 0 | 30 | #define SOF_ABI_PATCH 0 |
| 31 | 31 | ||
| 32 | /* SOF ABI version number. Format within 32bit word is MMmmmppp */ | 32 | /* SOF ABI version number. Format within 32bit word is MMmmmppp */ |
| @@ -85,6 +85,7 @@ · 84 unmodified lines | |||
| 85 | #define SOF_TKN_INTEL_DMIC_NUM_PDM_ACTIVE 605 | 85 | #define SOF_TKN_INTEL_DMIC_NUM_PDM_ACTIVE 605 |
| 86 | #define SOF_TKN_INTEL_DMIC_SAMPLE_RATE 608 | 86 | #define SOF_TKN_INTEL_DMIC_SAMPLE_RATE 608 |
| 87 | #define SOF_TKN_INTEL_DMIC_FIFO_WORD_LENGTH 609 | 87 | #define SOF_TKN_INTEL_DMIC_FIFO_WORD_LENGTH 609 |
| 88 | #define SOF_TKN_INTEL_DMIC_UNMUTE_RAMP_TIME_MS 610 | ||
| 88 | 89 | ||
| 89 | /* DMIC PDM */ | 90 | /* DMIC PDM */ |
| 90 | #define SOF_TKN_INTEL_DMIC_PDM_CTRL_ID 700 | 91 | #define SOF_TKN_INTEL_DMIC_PDM_CTRL_ID 700 |