lkml.org 
[lkml]   [2022]   [Jun]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v7 02/14] ALSA: hda: hda_cs_dsp_ctl: Add apis to write the controls directly
    Date
    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>
    ---
    sound/pci/hda/hda_cs_dsp_ctl.c | 39 ++++++++++++++++++++++++++++++++++
    sound/pci/hda/hda_cs_dsp_ctl.h | 4 ++++
    2 files changed, 43 insertions(+)

    diff --git a/sound/pci/hda/hda_cs_dsp_ctl.c b/sound/pci/hda/hda_cs_dsp_ctl.c
    index 0f4f02e0a538..91e37cb916dd 100644
    --- a/sound/pci/hda/hda_cs_dsp_ctl.c
    +++ b/sound/pci/hda/hda_cs_dsp_ctl.c
    @@ -202,6 +202,45 @@ 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 1c6d0fc9a2cc..c65bfd6878fd 100644
    --- 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__*/
    --
    2.34.1
    \
     
     \ /
      Last update: 2022-06-22 09:48    [W:3.785 / U:0.028 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site