[PATCH 0/5] media: rcar: Streams support preparation

[PATCH 0/5] media: rcar: Streams support preparation

[Tomi Valkeinen]

This series is a subset of the Renesas streams series, sent as a
separate series per Niklas' request:

https://lore.kernel.org/all/20251216-rcar-streams-v4-0-f28b4831cc67%40ideasonboard.com/

This subset contains the (hopefully) easy ones that can be merged
already.

These patches should not change the driver's behavior.

 Tomi

Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>
---
Tomi Valkeinen (5):
      media: rcar-isp: Improve ISPPROCMODE_DT_PROC_MODE_VC
      media: rcar-csi2: Improve FLD_FLD_EN macros
      media: rcar-csi2: Move rcsi2_calc_mbps()
      media: rcar-csi2: Simplify rcsi2_calc_mbps()
      media: rcar-csi2: Optimize rcsi2_calc_mbps()

 drivers/media/platform/renesas/rcar-csi2.c      | 116 +++++++++++++-----------
 drivers/media/platform/renesas/rcar-isp/csisp.c |  13 +--
 2 files changed, 67 insertions(+), 62 deletions(-)
---
base-commit: 7d0a66e4bb9081d75c82ec4957c50034cb0ea449
change-id: 20260115-rcar-streams-prep-1-1cc285538848

Best regards,
-- 
Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>

[PATCH 1/5] media: rcar-isp: Improve ISPPROCMODE_DT_PROC_MODE_VC

[Tomi Valkeinen]

Instead of having four macros for ISPPROCMODE_DT_PROC_MODE_VC[0123](pm),
have just one ISPPROCMODE_DT_PROC_MODE_VCn(vc, pm).

Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
---
 drivers/media/platform/renesas/rcar-isp/csisp.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/drivers/media/platform/renesas/rcar-isp/csisp.c b/drivers/media/platform/renesas/rcar-isp/csisp.c
index 1eb29a0b774a..8fb2cc3b5650 100644
--- a/drivers/media/platform/renesas/rcar-isp/csisp.c
+++ b/drivers/media/platform/renesas/rcar-isp/csisp.c
@@ -28,10 +28,7 @@
 #define ISPSTART_STOP					0x0000
 
 #define ISPPROCMODE_DT_REG(n)				(0x1100 + (0x4 * (n)))
-#define ISPPROCMODE_DT_PROC_MODE_VC3(pm)		(((pm) & 0x3f) << 24)
-#define ISPPROCMODE_DT_PROC_MODE_VC2(pm)		(((pm) & 0x3f) << 16)
-#define ISPPROCMODE_DT_PROC_MODE_VC1(pm)		(((pm) & 0x3f) << 8)
-#define ISPPROCMODE_DT_PROC_MODE_VC0(pm)		((pm) & 0x3f)
+#define ISPPROCMODE_DT_PROC_MODE_VCn(vc, pm)		(((pm) & 0x3f) << (8 * (vc)))
 
 #define ISPCS_FILTER_ID_CH_REG(n)			(0x3000 + (0x0100 * (n)))
 
@@ -263,10 +260,10 @@ static int risp_start(struct rcar_isp *isp, struct v4l2_subdev_state *state)
 
 	/* Setup processing method. */
 	risp_write_cs(isp, ISPPROCMODE_DT_REG(format->datatype),
-		      ISPPROCMODE_DT_PROC_MODE_VC3(format->procmode) |
-		      ISPPROCMODE_DT_PROC_MODE_VC2(format->procmode) |
-		      ISPPROCMODE_DT_PROC_MODE_VC1(format->procmode) |
-		      ISPPROCMODE_DT_PROC_MODE_VC0(format->procmode));
+		      ISPPROCMODE_DT_PROC_MODE_VCn(3, format->procmode) |
+		      ISPPROCMODE_DT_PROC_MODE_VCn(2, format->procmode) |
+		      ISPPROCMODE_DT_PROC_MODE_VCn(1, format->procmode) |
+		      ISPPROCMODE_DT_PROC_MODE_VCn(0, format->procmode));
 
 	/* Start ISP. */
 	risp_write_cs(isp, ISPSTART_REG, ISPSTART_START);

-- 
2.43.0

[PATCH 2/5] media: rcar-csi2: Improve FLD_FLD_EN macros

[Tomi Valkeinen]

Instead of having four macros for FLD_FLD_EN for different channels,
have just one FLD_FLD_EN(ch).

Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>
---
 drivers/media/platform/renesas/rcar-csi2.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/media/platform/renesas/rcar-csi2.c b/drivers/media/platform/renesas/rcar-csi2.c
index d1b31ab8b8c4..3cd35adb6803 100644
--- a/drivers/media/platform/renesas/rcar-csi2.c
+++ b/drivers/media/platform/renesas/rcar-csi2.c
@@ -71,10 +71,7 @@ struct rcar_csi2;
 #define FLD_REG				0x1c
 #define FLD_FLD_NUM(n)			(((n) & 0xff) << 16)
 #define FLD_DET_SEL(n)			(((n) & 0x3) << 4)
-#define FLD_FLD_EN4			BIT(3)
-#define FLD_FLD_EN3			BIT(2)
-#define FLD_FLD_EN2			BIT(1)
-#define FLD_FLD_EN			BIT(0)
+#define FLD_FLD_EN(ch)			BIT(ch)
 
 /* Automatic Standby Control */
 #define ASTBY_REG			0x20
@@ -1082,8 +1079,8 @@ static int rcsi2_start_receiver_gen3(struct rcar_csi2 *priv,
 	}
 
 	if (fmt->field == V4L2_FIELD_ALTERNATE)
-		fld = FLD_DET_SEL(1) | FLD_FLD_EN4 | FLD_FLD_EN3 | FLD_FLD_EN2
-			| FLD_FLD_EN;
+		fld = FLD_DET_SEL(1) | FLD_FLD_EN(3) | FLD_FLD_EN(2) |
+		      FLD_FLD_EN(1) | FLD_FLD_EN(0);
 
 	/*
 	 * Get the number of active data lanes inspecting the remote mbus

-- 
2.43.0

Re: [PATCH 2/5] media: rcar-csi2: Improve FLD_FLD_EN macros

[Niklas Söderlund]

Hi Tomi,

Thanks for your work.

On 2026-01-15 12:06:58 +0200, Tomi Valkeinen wrote:
> Instead of having four macros for FLD_FLD_EN for different channels,
> have just one FLD_FLD_EN(ch).
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>

Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>

> ---
>  drivers/media/platform/renesas/rcar-csi2.c | 9 +++------
>  1 file changed, 3 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/media/platform/renesas/rcar-csi2.c b/drivers/media/platform/renesas/rcar-csi2.c
> index d1b31ab8b8c4..3cd35adb6803 100644
> --- a/drivers/media/platform/renesas/rcar-csi2.c
> +++ b/drivers/media/platform/renesas/rcar-csi2.c
> @@ -71,10 +71,7 @@ struct rcar_csi2;
>  #define FLD_REG				0x1c
>  #define FLD_FLD_NUM(n)			(((n) & 0xff) << 16)
>  #define FLD_DET_SEL(n)			(((n) & 0x3) << 4)
> -#define FLD_FLD_EN4			BIT(3)
> -#define FLD_FLD_EN3			BIT(2)
> -#define FLD_FLD_EN2			BIT(1)
> -#define FLD_FLD_EN			BIT(0)
> +#define FLD_FLD_EN(ch)			BIT(ch)
>  
>  /* Automatic Standby Control */
>  #define ASTBY_REG			0x20
> @@ -1082,8 +1079,8 @@ static int rcsi2_start_receiver_gen3(struct rcar_csi2 *priv,
>  	}
>  
>  	if (fmt->field == V4L2_FIELD_ALTERNATE)
> -		fld = FLD_DET_SEL(1) | FLD_FLD_EN4 | FLD_FLD_EN3 | FLD_FLD_EN2
> -			| FLD_FLD_EN;
> +		fld = FLD_DET_SEL(1) | FLD_FLD_EN(3) | FLD_FLD_EN(2) |
> +		      FLD_FLD_EN(1) | FLD_FLD_EN(0);
>  
>  	/*
>  	 * Get the number of active data lanes inspecting the remote mbus
> 
> -- 
> 2.43.0
> 

-- 
Kind Regards,
Niklas Söderlund

[PATCH 3/5] media: rcar-csi2: Move rcsi2_calc_mbps()

[Tomi Valkeinen]

Move the function so that it can call rcsi2_get_active_lanes() in the
following patch.

No functional change intended.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
---
 drivers/media/platform/renesas/rcar-csi2.c | 58 +++++++++++++++---------------
 1 file changed, 29 insertions(+), 29 deletions(-)

diff --git a/drivers/media/platform/renesas/rcar-csi2.c b/drivers/media/platform/renesas/rcar-csi2.c
index 3cd35adb6803..8032fa4f7a8a 100644
--- a/drivers/media/platform/renesas/rcar-csi2.c
+++ b/drivers/media/platform/renesas/rcar-csi2.c
@@ -956,35 +956,6 @@ static int rcsi2_set_phypll(struct rcar_csi2 *priv, unsigned int mbps)
 	return 0;
 }
 
-static int rcsi2_calc_mbps(struct rcar_csi2 *priv, unsigned int bpp,
-			   unsigned int lanes)
-{
-	struct media_pad *remote_pad;
-	struct v4l2_subdev *source;
-	s64 freq;
-	u64 mbps;
-
-	if (!priv->remote)
-		return -ENODEV;
-
-	source = priv->remote;
-	remote_pad = &source->entity.pads[priv->remote_pad];
-
-	freq = v4l2_get_link_freq(remote_pad, bpp, 2 * lanes);
-	if (freq < 0) {
-		int ret = (int)freq;
-
-		dev_err(priv->dev, "failed to get link freq for %s: %d\n",
-			source->name, ret);
-
-		return ret;
-	}
-
-	mbps = div_u64(freq * 2, MEGA);
-
-	return mbps;
-}
-
 static int rcsi2_get_active_lanes(struct rcar_csi2 *priv,
 				  unsigned int *lanes)
 {
@@ -1032,6 +1003,35 @@ static int rcsi2_get_active_lanes(struct rcar_csi2 *priv,
 	return 0;
 }
 
+static int rcsi2_calc_mbps(struct rcar_csi2 *priv, unsigned int bpp,
+			   unsigned int lanes)
+{
+	struct media_pad *remote_pad;
+	struct v4l2_subdev *source;
+	s64 freq;
+	u64 mbps;
+
+	if (!priv->remote)
+		return -ENODEV;
+
+	source = priv->remote;
+	remote_pad = &source->entity.pads[priv->remote_pad];
+
+	freq = v4l2_get_link_freq(remote_pad, bpp, 2 * lanes);
+	if (freq < 0) {
+		int ret = (int)freq;
+
+		dev_err(priv->dev, "failed to get link freq for %s: %d\n",
+			source->name, ret);
+
+		return ret;
+	}
+
+	mbps = div_u64(freq * 2, MEGA);
+
+	return mbps;
+}
+
 static int rcsi2_start_receiver_gen3(struct rcar_csi2 *priv,
 				     struct v4l2_subdev_state *state)
 {

-- 
2.43.0

[PATCH 4/5] media: rcar-csi2: Simplify rcsi2_calc_mbps()

[Tomi Valkeinen]

Instead of taking the bpp and the number of lanes as parameters to
rcsi2_calc_mbps(), change the function to get those parameters inside
the function. This centralizes the code a bit and makes it easier to add
streams support.

Also, in the future when the legacy (non-link-freq) code is removed,
there will be no need to change rcsi2_calc_mbps() parameters.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
---
 drivers/media/platform/renesas/rcar-csi2.c | 45 ++++++++++++++++--------------
 1 file changed, 24 insertions(+), 21 deletions(-)

diff --git a/drivers/media/platform/renesas/rcar-csi2.c b/drivers/media/platform/renesas/rcar-csi2.c
index 8032fa4f7a8a..a2a87c5bfd7c 100644
--- a/drivers/media/platform/renesas/rcar-csi2.c
+++ b/drivers/media/platform/renesas/rcar-csi2.c
@@ -1003,13 +1003,18 @@ static int rcsi2_get_active_lanes(struct rcar_csi2 *priv,
 	return 0;
 }
 
-static int rcsi2_calc_mbps(struct rcar_csi2 *priv, unsigned int bpp,
-			   unsigned int lanes)
+static int rcsi2_calc_mbps(struct rcar_csi2 *priv,
+			   struct v4l2_subdev_state *state)
 {
+	const struct rcar_csi2_format *format;
+	struct v4l2_mbus_framefmt *fmt;
 	struct media_pad *remote_pad;
 	struct v4l2_subdev *source;
+	unsigned int lanes;
+	unsigned int bpp;
 	s64 freq;
 	u64 mbps;
+	int ret;
 
 	if (!priv->remote)
 		return -ENODEV;
@@ -1017,6 +1022,20 @@ static int rcsi2_calc_mbps(struct rcar_csi2 *priv, unsigned int bpp,
 	source = priv->remote;
 	remote_pad = &source->entity.pads[priv->remote_pad];
 
+	ret = rcsi2_get_active_lanes(priv, &lanes);
+	if (ret)
+		return ret;
+
+	fmt = v4l2_subdev_state_get_format(state, RCAR_CSI2_SINK);
+	if (!fmt)
+		return -EINVAL;
+
+	format = rcsi2_code_to_fmt(fmt->code);
+	if (!format)
+		return -EINVAL;
+
+	bpp = format->bpp;
+
 	freq = v4l2_get_link_freq(remote_pad, bpp, 2 * lanes);
 	if (freq < 0) {
 		int ret = (int)freq;
@@ -1093,7 +1112,7 @@ static int rcsi2_start_receiver_gen3(struct rcar_csi2 *priv,
 	phycnt = PHYCNT_ENABLECLK;
 	phycnt |= (1 << lanes) - 1;
 
-	mbps = rcsi2_calc_mbps(priv, format->bpp, lanes);
+	mbps = rcsi2_calc_mbps(priv, state);
 	if (mbps < 0)
 		return mbps;
 
@@ -1475,23 +1494,15 @@ static int rcsi2_start_receiver_v4h(struct rcar_csi2 *priv,
 				    struct v4l2_subdev_state *state)
 {
 	const struct rcsi2_cphy_setting *cphy = NULL;
-	const struct rcar_csi2_format *format;
-	const struct v4l2_mbus_framefmt *fmt;
 	unsigned int lanes;
 	int mbps;
 	int ret;
 
-	/* Use the format on the sink pad to compute the receiver config. */
-	fmt = v4l2_subdev_state_get_format(state, RCAR_CSI2_SINK);
-	format = rcsi2_code_to_fmt(fmt->code);
-	if (!format)
-		return -EINVAL;
-
 	ret = rcsi2_get_active_lanes(priv, &lanes);
 	if (ret)
 		return ret;
 
-	mbps = rcsi2_calc_mbps(priv, format->bpp, lanes);
+	mbps = rcsi2_calc_mbps(priv, state);
 	if (mbps < 0)
 		return mbps;
 
@@ -1732,23 +1743,15 @@ static int rcsi2_init_common_v4m(struct rcar_csi2 *priv, unsigned int mbps)
 static int rcsi2_start_receiver_v4m(struct rcar_csi2 *priv,
 				    struct v4l2_subdev_state *state)
 {
-	const struct rcar_csi2_format *format;
-	const struct v4l2_mbus_framefmt *fmt;
 	unsigned int lanes;
 	int mbps;
 	int ret;
 
-	/* Calculate parameters */
-	fmt = v4l2_subdev_state_get_format(state, RCAR_CSI2_SINK);
-	format = rcsi2_code_to_fmt(fmt->code);
-	if (!format)
-		return -EINVAL;
-
 	ret = rcsi2_get_active_lanes(priv, &lanes);
 	if (ret)
 		return ret;
 
-	mbps = rcsi2_calc_mbps(priv, format->bpp, lanes);
+	mbps = rcsi2_calc_mbps(priv, state);
 	if (mbps < 0)
 		return mbps;
 

-- 
2.43.0

[PATCH 5/5] media: rcar-csi2: Optimize rcsi2_calc_mbps()

[Tomi Valkeinen]

With modern drivers supporting link-freq, we don't need to do any
calculations based on the bpp and number of lanes when figuring out the
link frequency. However, the code currently always runs code to get the
bpp and number of lanes.

Optimize the rcsi2_calc_mbps() so that we only do that when needed, i.e.
when querying the link-freq is not supported by the upstream subdevice.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 drivers/media/platform/renesas/rcar-csi2.c | 50 +++++++++++++++++-------------
 1 file changed, 29 insertions(+), 21 deletions(-)

diff --git a/drivers/media/platform/renesas/rcar-csi2.c b/drivers/media/platform/renesas/rcar-csi2.c
index a2a87c5bfd7c..7305cc4a04cb 100644
--- a/drivers/media/platform/renesas/rcar-csi2.c
+++ b/drivers/media/platform/renesas/rcar-csi2.c
@@ -1006,15 +1006,10 @@ static int rcsi2_get_active_lanes(struct rcar_csi2 *priv,
 static int rcsi2_calc_mbps(struct rcar_csi2 *priv,
 			   struct v4l2_subdev_state *state)
 {
-	const struct rcar_csi2_format *format;
-	struct v4l2_mbus_framefmt *fmt;
 	struct media_pad *remote_pad;
 	struct v4l2_subdev *source;
-	unsigned int lanes;
-	unsigned int bpp;
 	s64 freq;
 	u64 mbps;
-	int ret;
 
 	if (!priv->remote)
 		return -ENODEV;
@@ -1022,28 +1017,41 @@ static int rcsi2_calc_mbps(struct rcar_csi2 *priv,
 	source = priv->remote;
 	remote_pad = &source->entity.pads[priv->remote_pad];
 
-	ret = rcsi2_get_active_lanes(priv, &lanes);
-	if (ret)
-		return ret;
+	/*
+	 * First try to get the real link freq. If that fails, try the heuristic
+	 * method with bpp and lanes (but that only works for one route).
+	 */
+	freq = v4l2_get_link_freq(remote_pad, 0, 0);
+	if (freq < 0) {
+		const struct rcar_csi2_format *format;
+		const struct v4l2_mbus_framefmt *fmt;
+		unsigned int lanes;
+		unsigned int bpp;
+		int ret;
 
-	fmt = v4l2_subdev_state_get_format(state, RCAR_CSI2_SINK);
-	if (!fmt)
-		return -EINVAL;
+		ret = rcsi2_get_active_lanes(priv, &lanes);
+		if (ret)
+			return ret;
 
-	format = rcsi2_code_to_fmt(fmt->code);
-	if (!format)
-		return -EINVAL;
+		fmt = v4l2_subdev_state_get_format(state, RCAR_CSI2_SINK);
+		if (!fmt)
+			return -EINVAL;
 
-	bpp = format->bpp;
+		format = rcsi2_code_to_fmt(fmt->code);
+		if (!format)
+			return -EINVAL;
 
-	freq = v4l2_get_link_freq(remote_pad, bpp, 2 * lanes);
-	if (freq < 0) {
-		int ret = (int)freq;
+		bpp = format->bpp;
 
-		dev_err(priv->dev, "failed to get link freq for %s: %d\n",
-			source->name, ret);
+		freq = v4l2_get_link_freq(remote_pad, bpp, 2 * lanes);
+		if (freq < 0) {
+			int ret = (int)freq;
 
-		return ret;
+			dev_err(priv->dev, "failed to get link freq for %s: %d\n",
+				source->name, ret);
+
+			return ret;
+		}
 	}
 
 	mbps = div_u64(freq * 2, MEGA);

-- 
2.43.0

Re: [PATCH 5/5] media: rcar-csi2: Optimize rcsi2_calc_mbps()

[Niklas Söderlund]

Hello Tomi,

Thanks for your patch.

On 2026-01-15 12:07:01 +0200, Tomi Valkeinen wrote:
> With modern drivers supporting link-freq, we don't need to do any
> calculations based on the bpp and number of lanes when figuring out the
> link frequency. However, the code currently always runs code to get the
> bpp and number of lanes.
> 
> Optimize the rcsi2_calc_mbps() so that we only do that when needed, i.e.
> when querying the link-freq is not supported by the upstream subdevice.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>
> Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>

> ---
>  drivers/media/platform/renesas/rcar-csi2.c | 50 +++++++++++++++++-------------
>  1 file changed, 29 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/media/platform/renesas/rcar-csi2.c b/drivers/media/platform/renesas/rcar-csi2.c
> index a2a87c5bfd7c..7305cc4a04cb 100644
> --- a/drivers/media/platform/renesas/rcar-csi2.c
> +++ b/drivers/media/platform/renesas/rcar-csi2.c
> @@ -1006,15 +1006,10 @@ static int rcsi2_get_active_lanes(struct rcar_csi2 *priv,
>  static int rcsi2_calc_mbps(struct rcar_csi2 *priv,
>  			   struct v4l2_subdev_state *state)
>  {
> -	const struct rcar_csi2_format *format;
> -	struct v4l2_mbus_framefmt *fmt;
>  	struct media_pad *remote_pad;
>  	struct v4l2_subdev *source;
> -	unsigned int lanes;
> -	unsigned int bpp;
>  	s64 freq;
>  	u64 mbps;
> -	int ret;
>  
>  	if (!priv->remote)
>  		return -ENODEV;
> @@ -1022,28 +1017,41 @@ static int rcsi2_calc_mbps(struct rcar_csi2 *priv,
>  	source = priv->remote;
>  	remote_pad = &source->entity.pads[priv->remote_pad];
>  
> -	ret = rcsi2_get_active_lanes(priv, &lanes);
> -	if (ret)
> -		return ret;
> +	/*
> +	 * First try to get the real link freq. If that fails, try the heuristic
> +	 * method with bpp and lanes (but that only works for one route).
> +	 */
> +	freq = v4l2_get_link_freq(remote_pad, 0, 0);
> +	if (freq < 0) {
> +		const struct rcar_csi2_format *format;
> +		const struct v4l2_mbus_framefmt *fmt;
> +		unsigned int lanes;
> +		unsigned int bpp;
> +		int ret;
>  
> -	fmt = v4l2_subdev_state_get_format(state, RCAR_CSI2_SINK);
> -	if (!fmt)
> -		return -EINVAL;
> +		ret = rcsi2_get_active_lanes(priv, &lanes);
> +		if (ret)
> +			return ret;
>  
> -	format = rcsi2_code_to_fmt(fmt->code);
> -	if (!format)
> -		return -EINVAL;
> +		fmt = v4l2_subdev_state_get_format(state, RCAR_CSI2_SINK);
> +		if (!fmt)
> +			return -EINVAL;
>  
> -	bpp = format->bpp;
> +		format = rcsi2_code_to_fmt(fmt->code);
> +		if (!format)
> +			return -EINVAL;
>  
> -	freq = v4l2_get_link_freq(remote_pad, bpp, 2 * lanes);
> -	if (freq < 0) {
> -		int ret = (int)freq;
> +		bpp = format->bpp;
>  
> -		dev_err(priv->dev, "failed to get link freq for %s: %d\n",
> -			source->name, ret);
> +		freq = v4l2_get_link_freq(remote_pad, bpp, 2 * lanes);
> +		if (freq < 0) {
> +			int ret = (int)freq;
>  
> -		return ret;
> +			dev_err(priv->dev, "failed to get link freq for %s: %d\n",
> +				source->name, ret);
> +
> +			return ret;
> +		}
>  	}
>  
>  	mbps = div_u64(freq * 2, MEGA);
> 
> -- 
> 2.43.0
> 

-- 
Kind Regards,
Niklas Söderlund

Re: [PATCH 0/5] media: rcar: Streams support preparation

[Niklas Söderlund]

Hello Tomi,

On 2026-01-15 12:06:56 +0200, Tomi Valkeinen wrote:
> This series is a subset of the Renesas streams series, sent as a
> separate series per Niklas' request:

Thanks for splitting this out to it's own series. Lets hope we can 
progress faster getting streams in by doing it in smaller series.

> 
> https://lore.kernel.org/all/20251216-rcar-streams-v4-0-f28b4831cc67%40ideasonboard.com/
> 
> This subset contains the (hopefully) easy ones that can be merged
> already.
> 
> These patches should not change the driver's behavior.

I think they look good! I have tested the result on Gen3 (M3N) and Gen4 
(V4H) and noticed no regressions. For the whole series,

Tested-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>

> 
>  Tomi
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>
> ---
> Tomi Valkeinen (5):
>       media: rcar-isp: Improve ISPPROCMODE_DT_PROC_MODE_VC
>       media: rcar-csi2: Improve FLD_FLD_EN macros
>       media: rcar-csi2: Move rcsi2_calc_mbps()
>       media: rcar-csi2: Simplify rcsi2_calc_mbps()
>       media: rcar-csi2: Optimize rcsi2_calc_mbps()
> 
>  drivers/media/platform/renesas/rcar-csi2.c      | 116 +++++++++++++-----------
>  drivers/media/platform/renesas/rcar-isp/csisp.c |  13 +--
>  2 files changed, 67 insertions(+), 62 deletions(-)
> ---
> base-commit: 7d0a66e4bb9081d75c82ec4957c50034cb0ea449
> change-id: 20260115-rcar-streams-prep-1-1cc285538848
> 
> Best regards,
> -- 
> Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>
> 

-- 
Kind Regards,
Niklas Söderlund