[v4,3/3] media: vsp1: Add support for RZ/G2L VSPD

  The RZ/G2L VSPD provides a single VSPD instance. It has the following
sub modules MAU, CTU, RPF, DPR, LUT, BRS, WPF and LIF.

The VSPD block on RZ/G2L does not have a version register, so added a
new compatible string "renesas,rzg2l-vsp2" with a data pointer containing
the info structure. Also the reset line is shared with the DU module.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
v3->v4:
 * Added Rb tag from Geert
 * Add switch() for LIF0 buffer attribute handling for RZ/G2L and V3M
v2->v3:
 * Fixed version comparison in vsp1_lookup()
v1->v2:
 * Changed the compatible from vsp2-rzg2l->rzg2l-vsp2
 * Added standalone device info for rzg2l-vsp2.
 * Added vsp1_lookup helper function.
 * Updated comments for LIF0 buffer attribute register
 * Used last ID for rzg2l-vsp2.
RFC->v1:
 * Used data pointer containing info structure to retrieve version information
RFC:
 * https://patchwork.kernel.org/project/linux-renesas-soc/patch/20220112174612.10773-21-biju.das.jz@bp.renesas.com/
---
 drivers/media/platform/vsp1/vsp1_drv.c  | 44 +++++++++++++++++++------
 drivers/media/platform/vsp1/vsp1_lif.c  | 16 +++++----
 drivers/media/platform/vsp1/vsp1_regs.h |  2 ++
 3 files changed, 46 insertions(+), 16 deletions(-)
  

Hi all,

> <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Subject: [PATCH v4 3/3] media: vsp1: Add support for RZ/G2L VSPD
> 
> The RZ/G2L VSPD provides a single VSPD instance. It has the following sub
> modules MAU, CTU, RPF, DPR, LUT, BRS, WPF and LIF.
> 
> The VSPD block on RZ/G2L does not have a version register, so added a new
> compatible string "renesas,rzg2l-vsp2" with a data pointer containing the
> info structure. Also the reset line is shared with the DU module.
> 
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> ---
> v3->v4:
>  * Added Rb tag from Geert
>  * Add switch() for LIF0 buffer attribute handling for RZ/G2L and V3M
> v2->v3:
>  * Fixed version comparison in vsp1_lookup()
> v1->v2:
>  * Changed the compatible from vsp2-rzg2l->rzg2l-vsp2
>  * Added standalone device info for rzg2l-vsp2.
>  * Added vsp1_lookup helper function.
>  * Updated comments for LIF0 buffer attribute register
>  * Used last ID for rzg2l-vsp2.
> RFC->v1:
>  * Used data pointer containing info structure to retrieve version
> information
> RFC:
> ---
>  drivers/media/platform/vsp1/vsp1_drv.c  | 44 +++++++++++++++++++------
> drivers/media/platform/vsp1/vsp1_lif.c  | 16 +++++----
> drivers/media/platform/vsp1/vsp1_regs.h |  2 ++
>  3 files changed, 46 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/media/platform/vsp1/vsp1_drv.c
> b/drivers/media/platform/vsp1/vsp1_drv.c
> index 699d7d985df4..4eef6d525eda 100644
> --- a/drivers/media/platform/vsp1/vsp1_drv.c
> +++ b/drivers/media/platform/vsp1/vsp1_drv.c
> @@ -811,11 +811,37 @@ static const struct vsp1_device_info
> vsp1_device_infos[] = {
>  	},
>  };
> 
> +static const struct vsp1_device_info rzg2l_vsp2_device_info = {
> +		.version = VI6_IP_VERSION_MODEL_VSPD_RZG2L,
> +		.model = "VSP2-D",
> +		.gen = 3,
> +		.features = VSP1_HAS_BRS | VSP1_HAS_WPF_VFLIP |
> VSP1_HAS_EXT_DL,
> +		.lif_count = 1,
> +		.rpf_count = 2,
> +		.wpf_count = 1,
> +};
> +
> +static const struct vsp1_device_info *vsp1_lookup(struct vsp1_device
> *vsp1,
> +						  u32 version)
> +{
> +	unsigned int i;
> +
> +	for (i = 0; i < ARRAY_SIZE(vsp1_device_infos); ++i) {
> +		if ((version & VI6_IP_VERSION_MODEL_MASK) ==
> +		    vsp1_device_infos[i].version) {
> +			vsp1->info = &vsp1_device_infos[i];
> +			break;
> +		}
> +	}
> +
> +	return vsp1->info;
> +}
> +
>  static int vsp1_probe(struct platform_device *pdev)  {
>  	struct vsp1_device *vsp1;
>  	struct device_node *fcp_node;
> -	unsigned int i;
> +	u32 version;
>  	int ret;
>  	int irq;
> 
> @@ -871,24 +897,21 @@ 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 = of_device_get_match_data(&pdev->dev);
> +	if (!vsp1->info) {
> +		version = vsp1_read(vsp1, VI6_IP_VERSION);
> +		vsp1->info = vsp1_lookup(vsp1, version);
>  	}
> 
>  	if (!vsp1->info) {
>  		dev_err(&pdev->dev, "unsupported IP version 0x%08x\n",
> -			vsp1->version);
> +			version);
>  		vsp1_device_put(vsp1);
>  		ret = -ENXIO;
>  		goto done;
>  	}
> 
> +	vsp1->version = vsp1->info->version;
>  	dev_dbg(&pdev->dev, "IP version 0x%08x\n", vsp1->version);
> 
>  	/*
> @@ -940,6 +963,7 @@ static int vsp1_remove(struct platform_device *pdev)
> static const struct of_device_id vsp1_of_match[] = {
>  	{ .compatible = "renesas,vsp1" },
>  	{ .compatible = "renesas,vsp2" },
> +	{ .compatible = "renesas,rzg2l-vsp2", .data =
> &rzg2l_vsp2_device_info
> +},
>  	{ },
>  };
>  MODULE_DEVICE_TABLE(of, vsp1_of_match); diff --git
> a/drivers/media/platform/vsp1/vsp1_lif.c
> b/drivers/media/platform/vsp1/vsp1_lif.c
> index 6a6857ac9327..37b767adba23 100644
> --- a/drivers/media/platform/vsp1/vsp1_lif.c
> +++ b/drivers/media/platform/vsp1/vsp1_lif.c
> @@ -107,6 +107,7 @@ static void lif_configure_stream(struct vsp1_entity
> *entity,
> 
>  	case VI6_IP_VERSION_MODEL_VSPDL_GEN3:
>  	case VI6_IP_VERSION_MODEL_VSPD_V3:
> +	case VI6_IP_VERSION_MODEL_VSPD_RZG2L:
>  		hbth = 0;
>  		obth = 1500;
>  		lbth = 0;
> @@ -130,16 +131,19 @@ static void lif_configure_stream(struct vsp1_entity
> *entity,
>  			VI6_LIF_CTRL_REQSEL | VI6_LIF_CTRL_LIF_EN);
> 
>  	/*
> -	 * On R-Car V3M the LIF0 buffer attribute register has to be set to
> a
> -	 * non-default value to guarantee proper operation (otherwise
> artifacts
> -	 * may appear on the output). The value required by the manual is
> not
> -	 * explained but is likely a buffer size or threshold.
> +	 * On R-Car V3M and RZ/G2L the LIF0 buffer attribute register has to
> be
> +	 * set to a non-default value to guarantee proper operation
> (otherwise
> +	 * artifacts may appear on the output). The value required by the
> +	 * manual is not explained but is likely a buffer size or threshold.
>  	 */
> -	if ((entity->vsp1->version & VI6_IP_VERSION_MASK) ==
> -	    (VI6_IP_VERSION_MODEL_VSPD_V3 | VI6_IP_VERSION_SOC_V3M))
> +	switch (entity->vsp1->version & VI6_IP_VERSION_MODEL_MASK) {

My bad, It is VI6_IP_VERSION_MASK, not VI6_IP_VERSION_MODEL_MASK. I will send V5 fixing this.

Cheers,
Biju


> +	case (VI6_IP_VERSION_MODEL_VSPD_V3 | VI6_IP_VERSION_SOC_V3M):
> +	case VI6_IP_VERSION_MODEL_VSPD_RZG2L:
>  		vsp1_lif_write(lif, dlb, VI6_LIF_LBA,
>  			       VI6_LIF_LBA_LBA0 |
>  			       (1536 << VI6_LIF_LBA_LBA1_SHIFT));
> +		break;
> +	}
>  }
> 
>  static const struct vsp1_entity_operations lif_entity_ops = { diff --git
> a/drivers/media/platform/vsp1/vsp1_regs.h
> b/drivers/media/platform/vsp1/vsp1_regs.h
> index fae7286eb01e..3dda11fe4e08 100644
> --- a/drivers/media/platform/vsp1/vsp1_regs.h
> +++ b/drivers/media/platform/vsp1/vsp1_regs.h
> @@ -767,6 +767,8 @@
>  #define VI6_IP_VERSION_MODEL_VSPDL_GEN3	(0x19 << 8)
>  #define VI6_IP_VERSION_MODEL_VSPBS_GEN3	(0x1a << 8)
>  #define VI6_IP_VERSION_MODEL_VSPD_V3U	(0x1c << 8)
> +/* RZ/G2L SoC's have no version register, So using last ID for the
> version */
> +#define VI6_IP_VERSION_MODEL_VSPD_RZG2L	(0xff << 8)
> 
>  #define VI6_IP_VERSION_SOC_MASK		(0xff << 0)
>  #define VI6_IP_VERSION_SOC_H2		(0x01 << 0)
> --
> 2.17.1