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

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>

diff --git a/sound/pci/hda/hda_cs_dsp_ctl.c b/sound/pci/hda/hda_cs_dsp_ctl.c
index 74e2c5bd1b08a1962d32d95b1791ed75acf33be1..2351476c9ee6b24f2616fdbeea69598c92b35a2c 100644 (file)
--- a/sound/pci/hda/hda_cs_dsp_ctl.c
+++ b/sound/pci/hda/hda_cs_dsp_ctl.c
@@ -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");

diff --git a/sound/pci/hda/hda_cs_dsp_ctl.h b/sound/pci/hda/hda_cs_dsp_ctl.h
index 1c6d0fc9a2cc541b5f1e70fc24030200874567cf..c65bfd6878fde4c668103fcede15107557a81adf 100644 (file)
--- a/sound/pci/hda/hda_cs_dsp_ctl.h
+++ b/sound/pci/hda/hda_cs_dsp_ctl.h
@@ -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__*/