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A number of laptops have gone to market with old firmware versions that
export controls that have since been hidden, but we can't just install a
newer firmware because the firmware for each product is customized and
qualified by the OEM. The issue is that alsactl save and restore has no
idea what controls are good to persist which can lead to
misconfiguration.
There is no reason that the UCM or user should need to interact with any
of the ALSA controls for the firmware coefficients so they can be
removed entirely, this also simplifies the driver.
Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Link: https://patch.msgid.link/20240801143139.34549-1-simont@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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It is possible that during system boot when there multiple devices
attempting simultaneous initialization on a slow control bus the
download of firmware and tuning data may take a user perceivable amount
of time (a slow I2C bus with 4 amps this work could take over 2
seconds).
Adopt a pattern used in the ASoC driver and perform this activity in a
background thread so that interactive performance is not impaired. The
system_long_wq is a parallel workqueue and driver instances will perform
their firmware downloads in parallel to make best use of available bus
bandwidth.
Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Link: https://lore.kernel.org/20240618130011.62860-1-simont@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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Add the HID for the CS35L54 and CS35L57 Boosted Smart Amplifiers. These
have the same control interface as the CS35L56 so are handled by the
cs35l56-hda driver.
Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Message-ID: <20240308135900.603192-3-rf@opensource.cirrus.com>
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Add a driver for the Cirrus Logic CS35L56 amplifier. This uses the same
component binding API as the CS35L41 driver. This is not a standalone
HDA device; it provides control of the CS35L56 for systems that use a
combination of an HDA codec and CS35L56 amplifiers with audio routed
through the HDA codec.
The CS35L56 combines a high-performance mono audio amplifier, Class-H
tracking inductive boost converter, Halo Core(TM) DSP and a DC-DC boost
converter supporting Class-H tracking.
Control interfaces are I2C or SPI through the standard Linux I2C or SPI
bus framework.
Most chip functionality is controlled by on-board ROM firmware that is
always running. Firmware patches can be applied by the driver in the form
of a .wmfw file (firmware patch) and/or a .bin file (system tuning).
Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20230721132120.5523-12-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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