Re: [PATCH 3/4] media: platform: replace of_graph_get_next_endpoint()

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Morimoto-san,

Thank you for the patch.

On Tue, Feb 06, 2024 at 02:55:38AM +0000, Kuninori Morimoto wrote:
> From DT point of view, in general, drivers should be asking for a
> specific port number because their function is fixed in the binding.
> 
> of_graph_get_next_endpoint() doesn't match to this concept.
> 
> Simply replace
> 
> 	- of_graph_get_next_endpoint(xxx, NULL);
> 	+ of_graph_get_endpoint_by_regs(xxx, 0, -1);
> 
> Link: https://lore.kernel.org/r/20240202174941.GA310089-robh@kernel.org
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> ---
>  drivers/media/platform/atmel/atmel-isi.c              | 4 ++--
>  drivers/media/platform/intel/pxa_camera.c             | 2 +-
>  drivers/media/platform/samsung/exynos4-is/fimc-is.c   | 2 +-
>  drivers/media/platform/samsung/exynos4-is/mipi-csis.c | 2 +-
>  drivers/media/platform/st/stm32/stm32-dcmi.c          | 4 ++--
>  drivers/media/platform/ti/davinci/vpif.c              | 3 +--
>  6 files changed, 8 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/media/platform/atmel/atmel-isi.c b/drivers/media/platform/atmel/atmel-isi.c
> index 4046212d48b4..f615aee85968 100644
> --- a/drivers/media/platform/atmel/atmel-isi.c
> +++ b/drivers/media/platform/atmel/atmel-isi.c
> @@ -831,7 +831,7 @@ static int atmel_isi_parse_dt(struct atmel_isi *isi,
>  	isi->pdata.full_mode = 1;
>  	isi->pdata.frate = ISI_CFG1_FRATE_CAPTURE_ALL;
>  
> -	np = of_graph_get_next_endpoint(np, NULL);
> +	np = of_graph_get_endpoint_by_regs(np, 0, -1);
>  	if (!np) {
>  		dev_err(&pdev->dev, "Could not find the endpoint\n");
>  		return -EINVAL;
> @@ -1155,7 +1155,7 @@ static int isi_graph_init(struct atmel_isi *isi)
>  	struct device_node *ep;
>  	int ret;
>  
> -	ep = of_graph_get_next_endpoint(isi->dev->of_node, NULL);
> +	ep = of_graph_get_endpoint_by_regs(isi->dev->of_node, 0, -1);
>  	if (!ep)
>  		return -EINVAL;
>  
> diff --git a/drivers/media/platform/intel/pxa_camera.c b/drivers/media/platform/intel/pxa_camera.c
> index 59b89e421dc2..d904952bf00e 100644
> --- a/drivers/media/platform/intel/pxa_camera.c
> +++ b/drivers/media/platform/intel/pxa_camera.c
> @@ -2207,7 +2207,7 @@ static int pxa_camera_pdata_from_dt(struct device *dev,
>  		pcdev->mclk = mclk_rate;
>  	}
>  
> -	np = of_graph_get_next_endpoint(np, NULL);
> +	np = of_graph_get_endpoint_by_regs(np, 0, -1);
>  	if (!np) {
>  		dev_err(dev, "could not find endpoint\n");
>  		return -EINVAL;
> diff --git a/drivers/media/platform/samsung/exynos4-is/fimc-is.c b/drivers/media/platform/samsung/exynos4-is/fimc-is.c
> index a08c87ef6e2d..39aab667910d 100644
> --- a/drivers/media/platform/samsung/exynos4-is/fimc-is.c
> +++ b/drivers/media/platform/samsung/exynos4-is/fimc-is.c
> @@ -175,7 +175,7 @@ static int fimc_is_parse_sensor_config(struct fimc_is *is, unsigned int index,
>  		return -EINVAL;
>  	}
>  
> -	ep = of_graph_get_next_endpoint(node, NULL);
> +	ep = of_graph_get_endpoint_by_regs(node, 0, -1);
>  	if (!ep)
>  		return -ENXIO;
>  
> diff --git a/drivers/media/platform/samsung/exynos4-is/mipi-csis.c b/drivers/media/platform/samsung/exynos4-is/mipi-csis.c
> index 686ca8753ba2..3f8bea2e3934 100644
> --- a/drivers/media/platform/samsung/exynos4-is/mipi-csis.c
> +++ b/drivers/media/platform/samsung/exynos4-is/mipi-csis.c
> @@ -728,7 +728,7 @@ static int s5pcsis_parse_dt(struct platform_device *pdev,
>  				 &state->max_num_lanes))
>  		return -EINVAL;
>  
> -	node = of_graph_get_next_endpoint(node, NULL);
> +	node = of_graph_get_endpoint_by_regs(node, 0, -1);

This is not correct, see
Documentation/devicetree/bindings/media/samsung,exynos4210-csis.yaml.

>  	if (!node) {
>  		dev_err(&pdev->dev, "No port node at %pOF\n",
>  				pdev->dev.of_node);
> diff --git a/drivers/media/platform/st/stm32/stm32-dcmi.c b/drivers/media/platform/st/stm32/stm32-dcmi.c
> index 8cb4fdcae137..4c00aae013af 100644
> --- a/drivers/media/platform/st/stm32/stm32-dcmi.c
> +++ b/drivers/media/platform/st/stm32/stm32-dcmi.c
> @@ -1856,7 +1856,7 @@ static int dcmi_graph_init(struct stm32_dcmi *dcmi)
>  	struct device_node *ep;
>  	int ret;
>  
> -	ep = of_graph_get_next_endpoint(dcmi->dev->of_node, NULL);
> +	ep = of_graph_get_endpoint_by_regs(dcmi->dev->of_node, 0, -1);
>  	if (!ep) {
>  		dev_err(dcmi->dev, "Failed to get next endpoint\n");
>  		return -EINVAL;
> @@ -1915,7 +1915,7 @@ static int dcmi_probe(struct platform_device *pdev)
>  				     "Could not get reset control\n");
>  
>  	/* Get bus characteristics from devicetree */
> -	np = of_graph_get_next_endpoint(np, NULL);
> +	np = of_graph_get_endpoint_by_regs(np, 0, -1);
>  	if (!np) {
>  		dev_err(&pdev->dev, "Could not find the endpoint\n");
>  		return -ENODEV;
> diff --git a/drivers/media/platform/ti/davinci/vpif.c b/drivers/media/platform/ti/davinci/vpif.c
> index 63cdfed37bc9..f4e1fa76bf37 100644
> --- a/drivers/media/platform/ti/davinci/vpif.c
> +++ b/drivers/media/platform/ti/davinci/vpif.c
> @@ -465,8 +465,7 @@ static int vpif_probe(struct platform_device *pdev)
>  	 * so their devices need to be registered manually here
>  	 * for their legacy platform_drivers to work.
>  	 */
> -	endpoint = of_graph_get_next_endpoint(pdev->dev.of_node,
> -					      endpoint);
> +	endpoint = of_graph_get_endpoint_by_regs(pdev->dev.of_node, 0, -1);
>  	if (!endpoint)
>  		return 0;
>  	of_node_put(endpoint);

-- 
Regards,

Laurent Pinchart