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ASoC: wm_adsp: Report when a control write changes the value

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Merge series from Richard Fitzgerald <rf@opensource.cirrus.com>:

Writing a firmware control should be returning 1 if the control value
changed, so these two patches add that.

Though this is an ALSA requirement it is also useful for non-ALSA clients
of cs_dsp to know if the control value changed, so the main handling is
implemented in cs_dsp. TLV controls are specifically an ALSA thing so they
are handled specially in wm_adsp.

Simon Trimmer (2):
  firmware: cs_dsp: cs_dsp_coeff_write_ctrl() should report changed
  ASoC: wm_adsp: Return whether changed when writing controls

 drivers/firmware/cirrus/cs_dsp.c | 17 ++++++++++++-----
 sound/soc/codecs/wm_adsp.c       | 27 ++++++++++++++++++---------
 2 files changed, 30 insertions(+), 14 deletions(-)

--
2.30.2
This commit is contained in:
Mark Brown 2022-11-25 14:23:03 +00:00
commit 57405d8be4
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 30 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/firmware/cirrus/cs_dsp.c
View File

@ -752,7 +752,7 @@ static int cs_dsp_coeff_write_ctrl_raw(struct cs_dsp_coeff_ctl *ctl,
*
* Must be called with pwr_lock held.
*
* Return: Zero for success, a negative number on error.
* Return: < 0 on error, 1 when the control value changed and 0 when it has not.
*/
int cs_dsp_coeff_write_ctrl(struct cs_dsp_coeff_ctl *ctl,
unsigned int off, const void *buf, size_t len)
@ -767,16 +767,23 @@ int cs_dsp_coeff_write_ctrl(struct cs_dsp_coeff_ctl *ctl,
if (len + off * sizeof(u32) > ctl->len)
return -EINVAL;
if (ctl->flags & WMFW_CTL_FLAG_VOLATILE)
if (ctl->flags & WMFW_CTL_FLAG_VOLATILE) {
ret = -EPERM;
else if (buf != ctl->cache)
memcpy(ctl->cache + off * sizeof(u32), buf, len);
} else if (buf != ctl->cache) {
if (memcmp(ctl->cache + off * sizeof(u32), buf, len))
memcpy(ctl->cache + off * sizeof(u32), buf, len);
else
return 0;
}
ctl->set = 1;
if (ctl->enabled && ctl->dsp->running)
ret = cs_dsp_coeff_write_ctrl_raw(ctl, off, buf, len);
return ret;
if (ret < 0)
return ret;
return 1;
}
EXPORT_SYMBOL_GPL(cs_dsp_coeff_write_ctrl);

27
sound/soc/codecs/wm_adsp.c
View File

@ -19,6 +19,7 @@
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/workqueue.h>
#include <linux/debugfs.h>
#include <sound/core.h>
@ -419,16 +420,21 @@ static int wm_coeff_tlv_put(struct snd_kcontrol *kctl,
(struct soc_bytes_ext *)kctl->private_value;
struct wm_coeff_ctl *ctl = bytes_ext_to_ctl(bytes_ext);
struct cs_dsp_coeff_ctl *cs_ctl = ctl->cs_ctl;
void *scratch;
int ret = 0;
mutex_lock(&cs_ctl->dsp->pwr_lock);
scratch = vmalloc(size);
if (!scratch)
return -ENOMEM;
if (copy_from_user(cs_ctl->cache, bytes, size))
if (copy_from_user(scratch, bytes, size)) {
ret = -EFAULT;
else
ret = cs_dsp_coeff_write_ctrl(cs_ctl, 0, cs_ctl->cache, size);
mutex_unlock(&cs_ctl->dsp->pwr_lock);
} else {
mutex_lock(&cs_ctl->dsp->pwr_lock);
ret = cs_dsp_coeff_write_ctrl(cs_ctl, 0, scratch, size);
mutex_unlock(&cs_ctl->dsp->pwr_lock);
}
vfree(scratch);
return ret;
}
@ -455,7 +461,10 @@ static int wm_coeff_put_acked(struct snd_kcontrol *kctl,
mutex_unlock(&cs_ctl->dsp->pwr_lock);
return ret;
if (ret < 0)
return ret;
return 1;
}
static int wm_coeff_get(struct snd_kcontrol *kctl,
@ -682,10 +691,10 @@ int wm_adsp_write_ctl(struct wm_adsp *dsp, const char *name, int type,
int ret;
ret = cs_dsp_coeff_write_ctrl(cs_ctl, 0, buf, len);
if (ret)
if (ret < 0)
return ret;
if (cs_ctl->flags & WMFW_CTL_FLAG_SYS)
if (ret == 0 || (cs_ctl->flags & WMFW_CTL_FLAG_SYS))
return 0;
ctl = cs_ctl->priv;