linux-kernel - Re: [PATCH 06/11] remoteproc: imx_dsp_rproc: Use start/stop/detect_mode ops from imx_rproc

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Message-ID: <aQUIR9YhTPxY0SpX@lizhi-Precision-Tower-5810>
Date: Fri, 31 Oct 2025 15:04:39 -0400
From: Frank Li <Frank.li@....com>
To: Peng Fan <peng.fan@....com>
Cc: Bjorn Andersson <andersson@...nel.org>,
	Mathieu Poirier <mathieu.poirier@...aro.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Shengjiu Wang <shengjiu.wang@....com>,
	Daniel Baluta <daniel.baluta@....com>,
	Iuliana Prodan <iuliana.prodan@....com>,
	linux-remoteproc@...r.kernel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 06/11] remoteproc: imx_dsp_rproc: Use
 start/stop/detect_mode ops from imx_rproc_dcfg

On Fri, Oct 31, 2025 at 05:08:35PM +0800, Peng Fan wrote:
> Allow each platform to provide its own implementation of start/stop/
> detect_mode operations, and prepare to eliminate the need for multiple
> switch-case statements.
>
> Improve code readability and maintainability by encapsulating
> platform-specific behavior.
>
> No functional changes.
>
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
>  drivers/remoteproc/imx_dsp_rproc.c | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
>
> diff --git a/drivers/remoteproc/imx_dsp_rproc.c b/drivers/remoteproc/imx_dsp_rproc.c
> index 1726aaa1eafb9ac1a913e3e2caea73801b86dc09..833b1bd4019614157f0bedf09bd348caab802eef 100644
> --- a/drivers/remoteproc/imx_dsp_rproc.c
> +++ b/drivers/remoteproc/imx_dsp_rproc.c
> @@ -404,6 +404,11 @@ static int imx_dsp_rproc_start(struct rproc *rproc)
>  	struct device *dev = rproc->dev.parent;
>  	int ret;
>
> +	if (dcfg->ops && dcfg->ops->start) {
> +		ret = dcfg->ops->start(rproc);
> +		goto start_ret;

not sure if error message is important, maybe

		return dcfg->ops->start(rproc);

Frank
> +	}
> +
>  	switch (dcfg->method) {
>  	case IMX_RPROC_MMIO:
>  		ret = regmap_update_bits(priv->regmap,
> @@ -424,6 +429,7 @@ static int imx_dsp_rproc_start(struct rproc *rproc)
>  		return -EOPNOTSUPP;
>  	}
>
> +start_ret:
>  	if (ret)
>  		dev_err(dev, "Failed to enable remote core!\n");
>  	else if (priv->flags & WAIT_FW_READY)
> @@ -449,6 +455,11 @@ static int imx_dsp_rproc_stop(struct rproc *rproc)
>  		return 0;
>  	}
>
> +	if (dcfg->ops && dcfg->ops->stop) {
> +		ret = dcfg->ops->stop(rproc);
> +		goto stop_ret;
> +	}
> +
>  	switch (dcfg->method) {
>  	case IMX_RPROC_MMIO:
>  		ret = regmap_update_bits(priv->regmap, dcfg->src_reg, dcfg->src_mask,
> @@ -467,6 +478,7 @@ static int imx_dsp_rproc_stop(struct rproc *rproc)
>  		return -EOPNOTSUPP;
>  	}
>
> +stop_ret:
>  	if (ret)
>  		dev_err(dev, "Failed to stop remote core\n");
>  	else
> @@ -1085,10 +1097,14 @@ static int imx_dsp_attach_pm_domains(struct imx_dsp_rproc *priv)
>  static int imx_dsp_rproc_detect_mode(struct imx_dsp_rproc *priv)
>  {
>  	const struct imx_dsp_rproc_dcfg *dsp_dcfg = priv->dsp_dcfg;
> +	const struct imx_rproc_dcfg *dcfg = dsp_dcfg->dcfg;
>  	struct device *dev = priv->rproc->dev.parent;
>  	struct regmap *regmap;
>  	int ret = 0;
>
> +	if (dcfg->ops && dcfg->ops->detect_mode)
> +		return dcfg->ops->detect_mode(priv->rproc);
> +
>  	switch (dsp_dcfg->dcfg->method) {
>  	case IMX_RPROC_SCU_API:
>  		ret = imx_scu_get_handle(&priv->ipc_handle);
>
> --
> 2.37.1
>