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authorSimon Trimmer <simont@opensource.cirrus.com>2022-03-03 18:50:16 +0300
committerMark Brown <broonie@kernel.org>2022-03-07 16:14:57 +0300
commitb6b62d942bbc4d926bcf3799ea3bcaeb105fd04f (patch)
treeff2b506c0d528314f651fc061c970120e23c64b0 /sound/soc/codecs/wm_adsp.h
parent405afed8a728f23cfaa02f75bbc8bdd6b7322123 (diff)
downloadlinux-b6b62d942bbc4d926bcf3799ea3bcaeb105fd04f.tar.xz
ASoC: wm_adsp: Expand firmware loading search options
The parts supported by this driver can have product-specific firmware and tunings files. Typically these have been used on embedded systems where the manufacturer is responsible for installing the correct product-specific firmware files into /lib/firmware. However, the linux-firmware repository places all available firmwares into /lib/firmware and it is up to the driver to select the correct product-specific firmware from that directory. For example a product containing four smart amplifiers may provide firmware specific for that product and each of the amplifiers may have coefficient files containing tunings for their placement in the mechanical design. This change extends firmware (wmfw) and coefficient (bin) filenames to be of the general form: <cirrus/>part-dspN-fwtype<-system_name<-asoc_component_prefix>>.type Where the cirrus subdirectory, system_name and asoc_component_prefix are optional. New files will be placed in the cirrus subdirectory to avoid polluting the main /lib/firmware/ location. The generic name must be searched in /lib/firmware before /lib/firmware/cirrus so that a generic file in the new location does not override existing product-specific files in the legacy location. The search order for firmware files is: - cirrus/part-dspN-fwtype-system_name-asoc_component_prefix.wmfw - cirrus/part-dspN-fwtype-system_name.wmfw - part-dspN-fwtype.wmfw - cirrus/part-dspN-fwtype.wmfw - Qualifications are added to the filename so that rightwards is more specific. - The system_name is provided by the codec driver. - The asoc_component_prefix is used to identify tunings for individual parts because it would already exist to disambiguate the controls and it makes it obvious which firmware file applies to which device. The optional coefficient file must have the same filename construction as the discovered wmfw except: - where the wmfw has only system_name then the bin file can optionally include the asoc_component_prefix. This is to allow a common wmfw for all amps but separate tunings per amp. Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com> Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com> Link: https://lore.kernel.org/r/20220303155016.122125-1-simont@opensource.cirrus.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs/wm_adsp.h')
-rw-r--r--sound/soc/codecs/wm_adsp.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm_adsp.h b/sound/soc/codecs/wm_adsp.h
index 7f4fabbc6ad3..375009a65828 100644
--- a/sound/soc/codecs/wm_adsp.h
+++ b/sound/soc/codecs/wm_adsp.h
@@ -28,6 +28,7 @@ struct wm_adsp {
struct cs_dsp cs_dsp;
const char *part;
const char *fwf_name;
+ const char *system_name;
struct snd_soc_component *component;
unsigned int sys_config_size;