[PATCH v2] ASoC: da7219: Fix change notifications for tone generator frequency
The tone generator frequency control just returns 0 on successful write, not a boolean value indicating if there was a change or not. Compare what was written with the value that was there previously so that notifications are generated appropraitely when the value changes.
Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/codecs/da7219.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/sound/soc/codecs/da7219.c b/sound/soc/codecs/da7219.c index a28d3601b932..c08e15830cec 100644 --- a/sound/soc/codecs/da7219.c +++ b/sound/soc/codecs/da7219.c @@ -446,7 +446,7 @@ static int da7219_tonegen_freq_put(struct snd_kcontrol *kcontrol, struct soc_mixer_control *mixer_ctrl = (struct soc_mixer_control *) kcontrol->private_value; unsigned int reg = mixer_ctrl->reg; - __le16 val; + __le16 val_new, val_old; int ret;
/* @@ -454,13 +454,19 @@ static int da7219_tonegen_freq_put(struct snd_kcontrol *kcontrol, * Therefore we need to convert to little endian here to align with * HW registers. */ - val = cpu_to_le16(ucontrol->value.integer.value[0]); + val_new = cpu_to_le16(ucontrol->value.integer.value[0]);
mutex_lock(&da7219->ctrl_lock); - ret = regmap_raw_write(da7219->regmap, reg, &val, sizeof(val)); + ret = regmap_raw_read(da7219->regmap, reg, &val_old, sizeof(val_old)); + if (ret == 0) + ret = regmap_raw_write(da7219->regmap, reg, + &val_new, sizeof(val_new)); mutex_unlock(&da7219->ctrl_lock);
- return ret; + if (ret < 0) + return ret; + + return val_old != val_new; }
On 17 April 2022 20:28, Mark Brown wrote:
The tone generator frequency control just returns 0 on successful write, not a boolean value indicating if there was a change or not. Compare what was written with the value that was there previously so that notifications are generated appropraitely when the value changes.
s/appropraitely/appropriately/
Thanks for the update. Good spot.
Signed-off-by: Mark Brown broonie@kernel.org
sound/soc/codecs/da7219.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/sound/soc/codecs/da7219.c b/sound/soc/codecs/da7219.c index a28d3601b932..c08e15830cec 100644 --- a/sound/soc/codecs/da7219.c +++ b/sound/soc/codecs/da7219.c @@ -446,7 +446,7 @@ static int da7219_tonegen_freq_put(struct snd_kcontrol *kcontrol, struct soc_mixer_control *mixer_ctrl = (struct soc_mixer_control *) kcontrol->private_value; unsigned int reg = mixer_ctrl->reg;
- __le16 val;
__le16 val_new, val_old; int ret;
/*
@@ -454,13 +454,19 @@ static int da7219_tonegen_freq_put(struct snd_kcontrol *kcontrol, * Therefore we need to convert to little endian here to align with * HW registers. */
- val = cpu_to_le16(ucontrol->value.integer.value[0]);
val_new = cpu_to_le16(ucontrol->value.integer.value[0]);
mutex_lock(&da7219->ctrl_lock);
- ret = regmap_raw_write(da7219->regmap, reg, &val, sizeof(val));
- ret = regmap_raw_read(da7219->regmap, reg, &val_old, sizeof(val_old));
- if (ret == 0)
Wouldn't it make sense here to only perform the write if the values weren't the same?
ret = regmap_raw_write(da7219->regmap, reg,
mutex_unlock(&da7219->ctrl_lock);&val_new, sizeof(val_new));
- return ret;
- if (ret < 0)
return ret;
- return val_old != val_new;
}
-- 2.30.2
On Sun, 17 Apr 2022 20:27:33 +0100, Mark Brown wrote:
The tone generator frequency control just returns 0 on successful write, not a boolean value indicating if there was a change or not. Compare what was written with the value that was there previously so that notifications are generated appropraitely when the value changes.
Applied to
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next
Thanks!
[1/1] ASoC: da7219: Fix change notifications for tone generator frequency commit: 08ef48404965cfef99343d6bbbcf75b88c74aa0e
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
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If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.
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Thanks, Mark
participants (2)
-
Adam Thomson
-
Mark Brown