Re: [PATCH v2] media: mali-c55: Fix NULL dev stream alert for tpg/rsz/isp sub-device

[Dan Scally <dan.scally@ideasonboard.com>]

Hi Jempty, thanks for the patch

On 14/01/2026 01:50, jempty.liang wrote:
> The subdevices registered by the Mali-C55 driver do not have their
> 'struct device *dev' member initialized. This is visibile when looking

s/visibile/visible

The commit header also needs correcting really, as it still suggests that fixing the printout is the 
goal. Perhaps something like "media: mali-c55: Initialise dev member for struct v4l2_subdev"?

With that:

Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>

> at debug message, as in example:
> 
> "(NULL device *): collect_streams: sub-device 'mali-c55 tpg' does not
>   support streams"
> 
> Fix this by initializing the *dev field for each subdevice registered
> by the Mali-C55 driver.
> 
> Suggested-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
> Signed-off-by: jempty.liang <imntjempty@163.com>
> ---
>   drivers/media/platform/arm/mali-c55/mali-c55-isp.c     | 1 +
>   drivers/media/platform/arm/mali-c55/mali-c55-resizer.c | 1 +
>   drivers/media/platform/arm/mali-c55/mali-c55-tpg.c     | 1 +
>   3 files changed, 3 insertions(+)
> 
> diff --git a/drivers/media/platform/arm/mali-c55/mali-c55-isp.c b/drivers/media/platform/arm/mali-c55/mali-c55-isp.c
> index 497f25fbdd13..ce84aad9f1d5 100644
> --- a/drivers/media/platform/arm/mali-c55/mali-c55-isp.c
> +++ b/drivers/media/platform/arm/mali-c55/mali-c55-isp.c
> @@ -610,6 +610,7 @@ int mali_c55_register_isp(struct mali_c55 *mali_c55)
>   	sd->entity.ops = &mali_c55_isp_media_ops;
>   	sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_ISP;
>   	sd->internal_ops = &mali_c55_isp_internal_ops;
> +	sd->dev = mali_c55->dev;
>   	strscpy(sd->name, MALI_C55_DRIVER_NAME " isp", sizeof(sd->name));
>   
>   	isp->pads[MALI_C55_ISP_PAD_SINK_VIDEO].flags = MEDIA_PAD_FL_SINK |
> diff --git a/drivers/media/platform/arm/mali-c55/mali-c55-resizer.c b/drivers/media/platform/arm/mali-c55/mali-c55-resizer.c
> index a8d739af74b6..c4f46651dcee 100644
> --- a/drivers/media/platform/arm/mali-c55/mali-c55-resizer.c
> +++ b/drivers/media/platform/arm/mali-c55/mali-c55-resizer.c
> @@ -1070,6 +1070,7 @@ static int mali_c55_register_resizer(struct mali_c55 *mali_c55,
>   	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_STREAMS;
>   	sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_SCALER;
>   	sd->internal_ops = &mali_c55_resizer_internal_ops;
> +	sd->dev = mali_c55->dev;
>   
>   	rsz->pads[MALI_C55_RSZ_SINK_PAD].flags = MEDIA_PAD_FL_SINK;
>   	rsz->pads[MALI_C55_RSZ_SOURCE_PAD].flags = MEDIA_PAD_FL_SOURCE;
> diff --git a/drivers/media/platform/arm/mali-c55/mali-c55-tpg.c b/drivers/media/platform/arm/mali-c55/mali-c55-tpg.c
> index 1af5d2759a83..894f4cf377af 100644
> --- a/drivers/media/platform/arm/mali-c55/mali-c55-tpg.c
> +++ b/drivers/media/platform/arm/mali-c55/mali-c55-tpg.c
> @@ -370,6 +370,7 @@ int mali_c55_register_tpg(struct mali_c55 *mali_c55)
>   	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
>   	sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
>   	sd->internal_ops = &mali_c55_tpg_internal_ops;
> +	sd->dev = mali_c55->dev;
>   	strscpy(sd->name, MALI_C55_DRIVER_NAME " tpg", sizeof(sd->name));
>   
>   	pad->flags = MEDIA_PAD_FL_SOURCE;