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ALSA: hda: hda_cs_dsp_ctl: Add apis to write the controls directly

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DSP controls are exposed as ALSA controls, however,
some of these controls are required to be accessed by
the driver. Add apis which allow read/write of these
controls. The write api will also notify the ALSA control
on value change.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Signed-off-by: Vitaly Rodionov <vitalyr@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220630002335.366545-3-vitalyr@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Stefan Binding 2022-06-30 01:23:23 +01:00 committed by Takashi Iwai
parent 3233b978af
commit e414b05e72
2 changed files with 43 additions and 0 deletions
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39
sound/pci/hda/hda_cs_dsp_ctl.c
View File

@ -188,6 +188,45 @@ void hda_cs_dsp_control_remove(struct cs_dsp_coeff_ctl *cs_ctl)
}
EXPORT_SYMBOL_NS_GPL(hda_cs_dsp_control_remove, SND_HDA_CS_DSP_CONTROLS);
int hda_cs_dsp_write_ctl(struct cs_dsp *dsp, const char *name, int type,
unsigned int alg, const void *buf, size_t len)
{
struct cs_dsp_coeff_ctl *cs_ctl;
struct hda_cs_dsp_coeff_ctl *ctl;
int ret;
cs_ctl = cs_dsp_get_ctl(dsp, name, type, alg);
if (!cs_ctl)
return -EINVAL;
ctl = cs_ctl->priv;
ret = cs_dsp_coeff_write_ctrl(cs_ctl, 0, buf, len);
if (ret)
return ret;
if (cs_ctl->flags & WMFW_CTL_FLAG_SYS)
return 0;
snd_ctl_notify(ctl->card, SNDRV_CTL_EVENT_MASK_VALUE, &ctl->kctl->id);
return 0;
}
EXPORT_SYMBOL_NS_GPL(hda_cs_dsp_write_ctl, SND_HDA_CS_DSP_CONTROLS);
int hda_cs_dsp_read_ctl(struct cs_dsp *dsp, const char *name, int type,
unsigned int alg, void *buf, size_t len)
{
struct cs_dsp_coeff_ctl *cs_ctl;
cs_ctl = cs_dsp_get_ctl(dsp, name, type, alg);
if (!cs_ctl)
return -EINVAL;
return cs_dsp_coeff_read_ctrl(cs_ctl, 0, buf, len);
}
EXPORT_SYMBOL_NS_GPL(hda_cs_dsp_read_ctl, SND_HDA_CS_DSP_CONTROLS);
MODULE_DESCRIPTION("CS_DSP ALSA Control HDA Library");
MODULE_AUTHOR("Stefan Binding, <sbinding@opensource.cirrus.com>");
MODULE_LICENSE("GPL");

4
sound/pci/hda/hda_cs_dsp_ctl.h
View File

@ -29,5 +29,9 @@ struct hda_cs_dsp_ctl_info {
int hda_cs_dsp_control_add(struct cs_dsp_coeff_ctl *cs_ctl, struct hda_cs_dsp_ctl_info *info);
void hda_cs_dsp_control_remove(struct cs_dsp_coeff_ctl *cs_ctl);
int hda_cs_dsp_write_ctl(struct cs_dsp *dsp, const char *name, int type,
unsigned int alg, const void *buf, size_t len);
int hda_cs_dsp_read_ctl(struct cs_dsp *dsp, const char *name, int type,
unsigned int alg, void *buf, size_t len);
#endif /*__HDA_CS_DSP_CTL_H__*/