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From: Richard Fitzgerald <rf@opensource.cirrus.com>
To: <broonie@kernel.org>
Cc: <patches@opensource.cirrus.com>, <alsa-devel@alsa-project.org>,
	<linux-kernel@vger.kernel.org>,
	Simon Trimmer <simont@opensource.cirrus.com>,
	Richard Fitzgerald <rf@opensource.cirrus.com>
Subject: [PATCH 2/2] ASoC: wm_adsp: Return whether changed when writing controls
Date: Wed, 23 Nov 2022 14:51:40 +0000	[thread overview]
Message-ID: <20221123145140.2784030-3-rf@opensource.cirrus.com> (raw)
In-Reply-To: <20221123145140.2784030-1-rf@opensource.cirrus.com>

From: Simon Trimmer <simont@opensource.cirrus.com>

Functions that update cs_dsp controls need to handle return codes that
indicate whether the control value changed. A return code of 1 indicates
a change, 0 indicates no-change and a negative value is an error
condition.

Acked controls implicitly change value when written so a successful
write shall always report that the value changed.

Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
---
 sound/soc/codecs/wm_adsp.c | 26 +++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index 34a94b011518..9b1b522c9350 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -419,16 +419,21 @@ 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 +460,10 @@ 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 +690,10 @@ 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;
-- 
2.30.2


WARNING: multiple messages have this Message-ID (diff)
From: Richard Fitzgerald <rf@opensource.cirrus.com>
To: <broonie@kernel.org>
Cc: patches@opensource.cirrus.com, alsa-devel@alsa-project.org,
	Richard Fitzgerald <rf@opensource.cirrus.com>,
	Simon Trimmer <simont@opensource.cirrus.com>,
	linux-kernel@vger.kernel.org
Subject: [PATCH 2/2] ASoC: wm_adsp: Return whether changed when writing controls
Date: Wed, 23 Nov 2022 14:51:40 +0000	[thread overview]
Message-ID: <20221123145140.2784030-3-rf@opensource.cirrus.com> (raw)
In-Reply-To: <20221123145140.2784030-1-rf@opensource.cirrus.com>

From: Simon Trimmer <simont@opensource.cirrus.com>

Functions that update cs_dsp controls need to handle return codes that
indicate whether the control value changed. A return code of 1 indicates
a change, 0 indicates no-change and a negative value is an error
condition.

Acked controls implicitly change value when written so a successful
write shall always report that the value changed.

Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
---
 sound/soc/codecs/wm_adsp.c | 26 +++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index 34a94b011518..9b1b522c9350 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -419,16 +419,21 @@ 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 +460,10 @@ 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 +690,10 @@ 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;
-- 
2.30.2


  parent reply	other threads:[~2022-11-23 14:51 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-23 14:51 [PATCH 0/2] ASoC: wm_adsp: Report when a control write changes the value Richard Fitzgerald
2022-11-23 14:51 ` Richard Fitzgerald
2022-11-23 14:51 ` [PATCH 1/2] firmware: cs_dsp: cs_dsp_coeff_write_ctrl() should report changed Richard Fitzgerald
2022-11-23 14:51   ` Richard Fitzgerald
2022-11-23 14:51 ` Richard Fitzgerald [this message]
2022-11-23 14:51   ` [PATCH 2/2] ASoC: wm_adsp: Return whether changed when writing controls Richard Fitzgerald
2022-11-23 16:47   ` kernel test robot
2022-11-25 14:26 ` [PATCH 0/2] ASoC: wm_adsp: Report when a control write changes the value Mark Brown
2022-11-25 14:26   ` Mark Brown

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