[v13,3/5] media: renesas: vsp1: Add support for VSP software version

The VSPD block on RZ/G2L SoCs does not have a version register.

This patch adds support for adding VSP software version based on
device match.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
v12->v13:
 * No change
v11->v12:
 * No change
v10->v11:
 * No change
v9->v10:
 * No change
v8->v9:
 * Added Rb tag from Geert
 * Updated commit description RZ/G2L -> RZ/G2L SoCs.
 * Replaced break with return info in case a Model match is found and
   removed additional check for non-match case.
v8:
 * New patch
---
 drivers/media/platform/renesas/vsp1/vsp1.h    |  1 +
 .../media/platform/renesas/vsp1/vsp1_drv.c    | 43 +++++++++++++------
 .../media/platform/renesas/vsp1/vsp1_regs.h   |  2 +
 3 files changed, 33 insertions(+), 13 deletions(-)

Hi Biju,

Thank you for the patch.

On Thu, Aug 25, 2022 at 02:21:42PM +0100, Biju Das wrote:
> The VSPD block on RZ/G2L SoCs does not have a version register.
> 
> This patch adds support for adding VSP software version based on
> device match.
> 
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
> v12->v13:
>  * No change
> v11->v12:
>  * No change
> v10->v11:
>  * No change
> v9->v10:
>  * No change
> v8->v9:
>  * Added Rb tag from Geert
>  * Updated commit description RZ/G2L -> RZ/G2L SoCs.
>  * Replaced break with return info in case a Model match is found and
>    removed additional check for non-match case.
> v8:
>  * New patch
> ---
>  drivers/media/platform/renesas/vsp1/vsp1.h    |  1 +
>  .../media/platform/renesas/vsp1/vsp1_drv.c    | 43 +++++++++++++------
>  .../media/platform/renesas/vsp1/vsp1_regs.h   |  2 +
>  3 files changed, 33 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/media/platform/renesas/vsp1/vsp1.h b/drivers/media/platform/renesas/vsp1/vsp1.h
> index baf898d577ec..ff4435705abb 100644
> --- a/drivers/media/platform/renesas/vsp1/vsp1.h
> +++ b/drivers/media/platform/renesas/vsp1/vsp1.h
> @@ -67,6 +67,7 @@ struct vsp1_device_info {
>  	unsigned int uif_count;
>  	unsigned int wpf_count;
>  	unsigned int num_bru_inputs;
> +	u8 soc;
>  	bool uapi;
>  };
>  
> diff --git a/drivers/media/platform/renesas/vsp1/vsp1_drv.c b/drivers/media/platform/renesas/vsp1/vsp1_drv.c
> index 975e6851735e..223dd5f557ba 100644
> --- a/drivers/media/platform/renesas/vsp1/vsp1_drv.c
> +++ b/drivers/media/platform/renesas/vsp1/vsp1_drv.c
> @@ -817,11 +817,39 @@ static const struct vsp1_device_info vsp1_device_infos[] = {
>  	},
>  };
>  
> +static const struct vsp1_device_info *vsp1_lookup_info(struct vsp1_device *vsp1)
> +{
> +	const struct vsp1_device_info *info;
> +	unsigned int i;
> +
> +	/*
> +	 * Try the info stored in match data first for devices that don't have
> +	 * a version register.
> +	 */
> +	info = of_device_get_match_data(vsp1->dev);
> +	if (info) {
> +		vsp1->version = VI6_IP_VERSION_VSP_SW | info->version | info->soc;
> +		return info;
> +	}
> +
> +	vsp1->version = vsp1_read(vsp1, VI6_IP_VERSION);
> +
> +	for (i = 0; i < ARRAY_SIZE(vsp1_device_infos); ++i) {
> +		info = &vsp1_device_infos[i];
> +
> +		if ((vsp1->version & VI6_IP_VERSION_MODEL_MASK) == info->version)
> +			return info;
> +	}
> +
> +	dev_err(vsp1->dev, "unsupported IP version 0x%08x\n", vsp1->version);
> +
> +	return NULL;
> +}
> +
>  static int vsp1_probe(struct platform_device *pdev)
>  {
>  	struct vsp1_device *vsp1;
>  	struct device_node *fcp_node;
> -	unsigned int i;
>  	int ret;
>  	int irq;
>  
> @@ -877,19 +905,8 @@ static int vsp1_probe(struct platform_device *pdev)
>  	if (ret < 0)
>  		goto done;
>  
> -	vsp1->version = vsp1_read(vsp1, VI6_IP_VERSION);
> -
> -	for (i = 0; i < ARRAY_SIZE(vsp1_device_infos); ++i) {
> -		if ((vsp1->version & VI6_IP_VERSION_MODEL_MASK) ==
> -		    vsp1_device_infos[i].version) {
> -			vsp1->info = &vsp1_device_infos[i];
> -			break;
> -		}
> -	}
> -
> +	vsp1->info = vsp1_lookup_info(vsp1);
>  	if (!vsp1->info) {
> -		dev_err(&pdev->dev, "unsupported IP version 0x%08x\n",
> -			vsp1->version);
>  		vsp1_device_put(vsp1);
>  		ret = -ENXIO;
>  		goto done;
> diff --git a/drivers/media/platform/renesas/vsp1/vsp1_regs.h b/drivers/media/platform/renesas/vsp1/vsp1_regs.h
> index fae7286eb01e..4286d13eca32 100644
> --- a/drivers/media/platform/renesas/vsp1/vsp1_regs.h
> +++ b/drivers/media/platform/renesas/vsp1/vsp1_regs.h
> @@ -781,6 +781,8 @@
>  #define VI6_IP_VERSION_SOC_E3		(0x04 << 0)
>  #define VI6_IP_VERSION_SOC_V3U		(0x05 << 0)
>  
> +#define VI6_IP_VERSION_VSP_SW		(0xfffe << 16) /* SW VSP version */
> +
>  /* -----------------------------------------------------------------------------
>   * RPF CLUT Registers
>   */