arm64: dts: qcom: msm8953-xiaomi-vince: add TAS2557 speaker amplifier #252
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Nice, need to try if the amp on FP3+ works with this :) |
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Document the TAS2557 mono Class-D smart amplifier with an integrated DSP for speaker protection. The device is controlled over I2C and receives audio over I2S/TDM (ASI). It can drive a single mono speaker or, as two instances, a stereo pair; an optional firmware-name selects the DSP blob. Signed-off-by: Gianluca Boiano <morf3089@gmail.com>
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The TAS2557 is a mono Class-D smart amplifier with an on-chip DSP for speaker protection. Audio is received over I2S/TDM (ASI) and processed by DSP firmware before reaching the Class-D output stage. The driver uses an 8-bit book/page-indirected register map (regmap, REGCACHE_NONE), parses the TI "uCDSP" firmware (programs, configurations and PLL/program/config blocks) and applies program 0 / config 0 on power-up; audio cannot pass without the firmware blob. The ASI inputs, Class-D output and I/V sense paths are exposed via DAPM, together with Speaker, DSP program and configuration controls. Stereo is supported as two cooperating instances: device==3 firmware carries per-amplifier (DEV_A/DEV_B) tuning, selected per instance via the ti,channel property. An optional firmware-name DT property overrides the PG-version-derived blob name. Verbose probe/firmware/PLL-lock logging is provided for bring-up and diagnostics. Signed-off-by: Gianluca Boiano <morf3089@gmail.com>
Build the TAS2557 mono smart amplifier driver as a module, used by the Xiaomi Redmi 5 Plus (vince) for its loudspeaker. Signed-off-by: Gianluca Boiano <morf3089@gmail.com>
Wire up the TAS2557 mono speaker amplifier on the Redmi 5 Plus (vince): - it sits on i2c_2 at 0x4c with reset on GPIO86 and IRQ on GPIO87; its AVDD/DVDD/IOVDD pins are fed by the always-on 1.8 V rail pm8953_l6, and VBAT by the always-on battery rail; - it is the external PA on Quinary MI2S. The Android mixer paths route the speaker through QUIN_MI2S_RX, and the register-compatible Motorola ocean (tfa9874) and Fairphone 3 (aw8898) use Quinary as well. Add a dedicated Quinary MI2S dai-link for the amplifier and register the QUINARY_MI2S_RX AFE DAI (SD0, per the downstream). The internal codec stays on Primary MI2S, so earpiece and headphones are unaffected; - the MI2S pins (gpio88/91/93 plus the gpio92 word-clock, which uses the dedicated pri_mi2s_ws pinmux function) are configured. The LPASS routes Quinary onto these pins through the quin iomux that the apq8016_sbc machine driver already programs in its MI2S_QUINARY path, so no machine-driver change is required. Signed-off-by: Gianluca Boiano <morf3089@gmail.com>
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Adds TAS2557 loudspeaker support for the Xiaomi Redmi 5 Plus (vince).
dai-link
The amp is on Quinary MI2S, not Primary — Primary is the internal codec. Matches the stock mixer_paths and
the existing ocean/FP3 setups, so no machine-driver change.
Needs tas2557_uCDSP.bin (device-specific, pull from stock vendor into /lib/firmware) to actually pass audio.
Tested on device, speaker works.