From: Stefan Binding sbinding@opensource.cirrus.com
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 ---
Changes since v2: - No change
sound/pci/hda/hda_cs_dsp_ctl.c | 52 ++++++++++++++++++++++++++++++++++ sound/pci/hda/hda_cs_dsp_ctl.h | 4 +++ 2 files changed, 56 insertions(+)
diff --git a/sound/pci/hda/hda_cs_dsp_ctl.c b/sound/pci/hda/hda_cs_dsp_ctl.c index 46df48ff2ae1..3b837d000a00 100644 --- a/sound/pci/hda/hda_cs_dsp_ctl.c +++ b/sound/pci/hda/hda_cs_dsp_ctl.c @@ -237,6 +237,58 @@ 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, void *buf, size_t len) +{ + struct cs_dsp_coeff_ctl *cs_ctl; + struct hda_cs_dsp_coeff_ctl *ctl; + struct snd_kcontrol *kctl; + int ret; + + cs_ctl = cs_dsp_get_ctl(dsp, name, type, alg); + if (!cs_ctl) + return -EINVAL; + + ctl = cs_ctl->priv; + + if (len > cs_ctl->len) + return -EINVAL; + + 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; + + list_for_each_entry(kctl, &ctl->card->controls, list) + if (!strncmp(kctl->id.name, ctl->name, sizeof(kctl->id.name))) { + snd_ctl_notify(ctl->card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id); + return 0; + } + + dev_warn(dsp->dev, "Cannot find Control for %s\n", name); + + 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; + + if (len > cs_ctl->len) + 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 3c90312b45d6..65b9c5c68957 100644 --- a/sound/pci/hda/hda_cs_dsp_ctl.h +++ b/sound/pci/hda/hda_cs_dsp_ctl.h @@ -30,5 +30,9 @@ 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_remove_kcontrol(struct snd_card *card, const char *name); +int hda_cs_dsp_write_ctl(struct cs_dsp *dsp, const char *name, int type, + unsigned int alg, 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__*/