linux-kernel - Re: [PATCH v2 19/22] media: rockchip: rga: add feature flags

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Message-ID: <a5abd83b62220e86fd5ce627aa67c7236efb57e3.camel@ndufresne.ca>
Date: Wed, 24 Dec 2025 11:00:37 -0500
From: Nicolas Dufresne <nicolas@...fresne.ca>
To: Sven Püschel <s.pueschel@...gutronix.de>, Jacob Chen
	 <jacob-chen@...wrt.com>, Ezequiel Garcia <ezequiel@...guardiasur.com.ar>, 
 Mauro Carvalho Chehab
	 <mchehab@...nel.org>, Heiko Stuebner <heiko@...ech.de>, Rob Herring
	 <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
	 <conor+dt@...nel.org>
Cc: linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	devicetree@...r.kernel.org, kernel@...gutronix.de
Subject: Re: [PATCH v2 19/22] media: rockchip: rga: add feature flags

Le mercredi 03 décembre 2025 à 16:52 +0100, Sven Püschel a écrit :
> In preparation to the RGA3 addition add feature flags, which can limit
> the exposed feature set of the video device, like rotating or selection
> support. This is necessary as the RGA3 doesn't initially implement the
> full feature set currently exposed by the driver.
> 
> Signed-off-by: Sven Püschel <s.pueschel@...gutronix.de>

Reviewed-by: Nicolas Dufresne <nicolas.dufresne@...labora.com>

> ---
>  drivers/media/platform/rockchip/rga/rga-hw.c |  4 ++++
>  drivers/media/platform/rockchip/rga/rga.c    | 23 +++++++++++++++--------
>  drivers/media/platform/rockchip/rga/rga.h    |  7 +++++++
>  3 files changed, 26 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/media/platform/rockchip/rga/rga-hw.c
> b/drivers/media/platform/rockchip/rga/rga-hw.c
> index a868a34a1452e..0d1cf911af0d5 100644
> --- a/drivers/media/platform/rockchip/rga/rga-hw.c
> +++ b/drivers/media/platform/rockchip/rga/rga-hw.c
> @@ -658,6 +658,10 @@ const struct rga_hw rga2_hw = {
>  	.max_height = MAX_HEIGHT,
>  	.max_scaling_factor = MAX_SCALING_FACTOR,
>  	.stride_alignment = 4,
> +	.features = RGA_FEATURE_FLIP
> +		  | RGA_FEATURE_ROTATE
> +		  | RGA_FEATURE_BG_COLOR
> +		  | RGA_FEATURE_SELECTION,
>  
>  	.setup_cmdbuf = rga_hw_setup_cmdbuf,
>  	.start = rga_hw_start,
> diff --git a/drivers/media/platform/rockchip/rga/rga.c
> b/drivers/media/platform/rockchip/rga/rga.c
> index c991cc64b4b7f..3958e71b8987d 100644
> --- a/drivers/media/platform/rockchip/rga/rga.c
> +++ b/drivers/media/platform/rockchip/rga/rga.c
> @@ -162,17 +162,21 @@ static int rga_setup_ctrls(struct rga_ctx *ctx)
>  
>  	v4l2_ctrl_handler_init(&ctx->ctrl_handler, 4);
>  
> -	v4l2_ctrl_new_std(&ctx->ctrl_handler, &rga_ctrl_ops,
> -			  V4L2_CID_HFLIP, 0, 1, 1, 0);
> +	if (rga->hw->features & RGA_FEATURE_FLIP) {
> +		v4l2_ctrl_new_std(&ctx->ctrl_handler, &rga_ctrl_ops,
> +				  V4L2_CID_HFLIP, 0, 1, 1, 0);
>  
> -	v4l2_ctrl_new_std(&ctx->ctrl_handler, &rga_ctrl_ops,
> -			  V4L2_CID_VFLIP, 0, 1, 1, 0);
> +		v4l2_ctrl_new_std(&ctx->ctrl_handler, &rga_ctrl_ops,
> +				  V4L2_CID_VFLIP, 0, 1, 1, 0);
> +	}
>  
> -	v4l2_ctrl_new_std(&ctx->ctrl_handler, &rga_ctrl_ops,
> -			  V4L2_CID_ROTATE, 0, 270, 90, 0);
> +	if (rga->hw->features & RGA_FEATURE_ROTATE)
> +		v4l2_ctrl_new_std(&ctx->ctrl_handler, &rga_ctrl_ops,
> +				  V4L2_CID_ROTATE, 0, 270, 90, 0);
>  
> -	v4l2_ctrl_new_std(&ctx->ctrl_handler, &rga_ctrl_ops,
> -			  V4L2_CID_BG_COLOR, 0, 0xffffffff, 1, 0);
> +	if (rga->hw->features & RGA_FEATURE_BG_COLOR)
> +		v4l2_ctrl_new_std(&ctx->ctrl_handler, &rga_ctrl_ops,
> +				  V4L2_CID_BG_COLOR, 0, 0xffffffff, 1, 0);
>  
>  	if (ctx->ctrl_handler.error) {
>  		int err = ctx->ctrl_handler.error;
> @@ -489,6 +493,9 @@ static int vidioc_s_selection(struct file *file, void
> *priv,
>  	struct rga_frame *f;
>  	int ret = 0;
>  
> +	if (!(rga->hw->features & RGA_FEATURE_SELECTION))
> +		return -EINVAL;
> +
>  	f = rga_get_frame(ctx, s->type);
>  	if (IS_ERR(f))
>  		return PTR_ERR(f);
> diff --git a/drivers/media/platform/rockchip/rga/rga.h
> b/drivers/media/platform/rockchip/rga/rga.h
> index 980f70f842317..b9c75b5fda4dc 100644
> --- a/drivers/media/platform/rockchip/rga/rga.h
> +++ b/drivers/media/platform/rockchip/rga/rga.h
> @@ -6,6 +6,7 @@
>  #ifndef __RGA_H__
>  #define __RGA_H__
>  
> +#include <linux/bits.h>
>  #include <linux/clk.h>
>  #include <linux/platform_device.h>
>  #include <media/videobuf2-v4l2.h>
> @@ -132,6 +133,11 @@ static inline void rga_mod(struct rockchip_rga *rga, u32
> reg, u32 val, u32 mask)
>  	rga_write(rga, reg, temp);
>  };
>  
> +#define RGA_FEATURE_FLIP	BIT(0)
> +#define RGA_FEATURE_ROTATE	BIT(1)
> +#define RGA_FEATURE_BG_COLOR	BIT(2)
> +#define RGA_FEATURE_SELECTION	BIT(3)
> +
>  struct rga_hw {
>  	const char *card_type;
>  	bool has_internal_iommu;
> @@ -140,6 +146,7 @@ struct rga_hw {
>  	u32 max_width, max_height;
>  	u8 max_scaling_factor;
>  	u8 stride_alignment;
> +	u8 features;
>  
>  	void (*setup_cmdbuf)(struct rga_ctx *ctx);
>  	void (*start)(struct rockchip_rga *rga,

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