From 4d0333798ebbfa1683cc3bc056d1b25b8c24344c Mon Sep 17 00:00:00 2001 From: Simon Trimmer Date: Mon, 25 Mar 2024 11:31:23 +0000 Subject: firmware: cs_dsp: Add locked wrappers for coeff read and write It is a common pattern for functions to take and release the DSP pwr_lock over the cs_dsp calls to read and write firmware controls. Add wrapper functions to do this sequence so that the calling code can be simplified to a single function call.. Signed-off-by: Simon Trimmer Signed-off-by: Richard Fitzgerald Reviewed-by: Takashi Iwai Link: https://msgid.link/r/20240325113127.112783-2-rf@opensource.cirrus.com Signed-off-by: Mark Brown --- drivers/firmware/cirrus/cs_dsp.c | 54 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) (limited to 'drivers') diff --git a/drivers/firmware/cirrus/cs_dsp.c b/drivers/firmware/cirrus/cs_dsp.c index 79d4254d1f9b..1263382e0d10 100644 --- a/drivers/firmware/cirrus/cs_dsp.c +++ b/drivers/firmware/cirrus/cs_dsp.c @@ -819,6 +819,33 @@ int cs_dsp_coeff_write_ctrl(struct cs_dsp_coeff_ctl *ctl, } EXPORT_SYMBOL_NS_GPL(cs_dsp_coeff_write_ctrl, FW_CS_DSP); +/** + * cs_dsp_coeff_lock_and_write_ctrl() - Writes the given buffer to the given coefficient control + * @ctl: pointer to coefficient control + * @off: word offset at which data should be written + * @buf: the buffer to write to the given control + * @len: the length of the buffer in bytes + * + * Same as cs_dsp_coeff_write_ctrl() but takes pwr_lock. + * + * Return: A negative number on error, 1 when the control value changed and 0 when it has not. + */ +int cs_dsp_coeff_lock_and_write_ctrl(struct cs_dsp_coeff_ctl *ctl, + unsigned int off, const void *buf, size_t len) +{ + struct cs_dsp *dsp = ctl->dsp; + int ret; + + lockdep_assert_not_held(&dsp->pwr_lock); + + mutex_lock(&dsp->pwr_lock); + ret = cs_dsp_coeff_write_ctrl(ctl, off, buf, len); + mutex_unlock(&dsp->pwr_lock); + + return ret; +} +EXPORT_SYMBOL_GPL(cs_dsp_coeff_lock_and_write_ctrl); + static int cs_dsp_coeff_read_ctrl_raw(struct cs_dsp_coeff_ctl *ctl, unsigned int off, void *buf, size_t len) { @@ -891,6 +918,33 @@ int cs_dsp_coeff_read_ctrl(struct cs_dsp_coeff_ctl *ctl, } EXPORT_SYMBOL_NS_GPL(cs_dsp_coeff_read_ctrl, FW_CS_DSP); +/** + * cs_dsp_coeff_lock_and_read_ctrl() - Reads the given coefficient control into the given buffer + * @ctl: pointer to coefficient control + * @off: word offset at which data should be read + * @buf: the buffer to store to the given control + * @len: the length of the buffer in bytes + * + * Same as cs_dsp_coeff_read_ctrl() but takes pwr_lock. + * + * Return: Zero for success, a negative number on error. + */ +int cs_dsp_coeff_lock_and_read_ctrl(struct cs_dsp_coeff_ctl *ctl, + unsigned int off, void *buf, size_t len) +{ + struct cs_dsp *dsp = ctl->dsp; + int ret; + + lockdep_assert_not_held(&dsp->pwr_lock); + + mutex_lock(&dsp->pwr_lock); + ret = cs_dsp_coeff_read_ctrl(ctl, off, buf, len); + mutex_unlock(&dsp->pwr_lock); + + return ret; +} +EXPORT_SYMBOL_GPL(cs_dsp_coeff_lock_and_read_ctrl); + static int cs_dsp_coeff_init_control_caches(struct cs_dsp *dsp) { struct cs_dsp_coeff_ctl *ctl; -- cgit v1.2.3