1. 09 Sep, 2024 1 commit
    • Romain Gantois's avatar
      ASoC: tlv320aic31xx: Add support for loading filter coefficients · 77b696f4
      Romain Gantois authored
      The TLV320DAC3100 Audio DAC has 25 built-in digital audio processing blocks
      (PRBs). Each of these PRBs has a static filter structure with programmable
      coefficients. Once a PRB is selected for use by the DAC, its filter
      coefficients can be configured via a dedicated set of registers.
      
      Define a new optional firmware which can be loaded by the TLV320DAC driver.
      This firmware describes a full set of filter coefficients for all blocks
      used by the various PRBs.
      
      The firmware's binary format is heavily inspired by the one used in the
      peb2466 driver. It includes a version marker to allow for potential
      evolutions of the format.
      
      Note that adaptive filtering is not supported i.e. filter coefficients are
      loaded once before power-on and then cannot be changed while the DAC is
      powered. This is why only page A coefficients are modified. Page B
      coefficients are only used for adaptive filtering.
      Signed-off-by: default avatarRomain Gantois <romain.gantois@bootlin.com>
      Link: https://patch.msgid.link/20240906-tlv320-filter-v1-1-6955f53ff435@bootlin.comSigned-off-by: default avatarMark Brown <broonie@kernel.org>
      77b696f4
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