[PATCH v4 1/5] media: imx: Remove unused functions

[PATCH v4 1/5] media: imx: Remove unused functions

[Dorota Czaplejewicz]

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Neither imx_media_mbus_fmt_to_ipu_image nor imx_media_ipu_image_to_mbus_fmt
were used anywhere.

Signed-off-by: Dorota Czaplejewicz <dorota.czaplejewicz@puri.sm>
---

Hi,

Compared to v3, this patch series introduces the checks of imx_media_find_mbus_format return values in patch 4 and 5.

Cheers,
Dorota

 drivers/staging/media/imx/imx-media-utils.c | 42 ---------------------
 drivers/staging/media/imx/imx-media.h       |  4 --
 2 files changed, 46 deletions(-)

diff --git a/drivers/staging/media/imx/imx-media-utils.c b/drivers/staging/media/imx/imx-media-utils.c
index 5128915a5d6f..afa96e05ea7f 100644
--- a/drivers/staging/media/imx/imx-media-utils.c
+++ b/drivers/staging/media/imx/imx-media-utils.c
@@ -569,48 +569,6 @@ int imx_media_mbus_fmt_to_pix_fmt(struct v4l2_pix_format *pix,
 }
 EXPORT_SYMBOL_GPL(imx_media_mbus_fmt_to_pix_fmt);
 
-int imx_media_mbus_fmt_to_ipu_image(struct ipu_image *image,
-				    const struct v4l2_mbus_framefmt *mbus)
-{
-	int ret;
-
-	memset(image, 0, sizeof(*image));
-
-	ret = imx_media_mbus_fmt_to_pix_fmt(&image->pix, mbus, NULL);
-	if (ret)
-		return ret;
-
-	image->rect.width = mbus->width;
-	image->rect.height = mbus->height;
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(imx_media_mbus_fmt_to_ipu_image);
-
-int imx_media_ipu_image_to_mbus_fmt(struct v4l2_mbus_framefmt *mbus,
-				    const struct ipu_image *image)
-{
-	const struct imx_media_pixfmt *fmt;
-
-	fmt = imx_media_find_pixel_format(image->pix.pixelformat,
-					  PIXFMT_SEL_ANY);
-	if (!fmt || !fmt->codes || !fmt->codes[0])
-		return -EINVAL;
-
-	memset(mbus, 0, sizeof(*mbus));
-	mbus->width = image->pix.width;
-	mbus->height = image->pix.height;
-	mbus->code = fmt->codes[0];
-	mbus->field = image->pix.field;
-	mbus->colorspace = image->pix.colorspace;
-	mbus->xfer_func = image->pix.xfer_func;
-	mbus->ycbcr_enc = image->pix.ycbcr_enc;
-	mbus->quantization = image->pix.quantization;
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(imx_media_ipu_image_to_mbus_fmt);
-
 void imx_media_free_dma_buf(struct device *dev,
 			    struct imx_media_dma_buf *buf)
 {
diff --git a/drivers/staging/media/imx/imx-media.h b/drivers/staging/media/imx/imx-media.h
index 492d9a64e704..d2a150aac6cd 100644
--- a/drivers/staging/media/imx/imx-media.h
+++ b/drivers/staging/media/imx/imx-media.h
@@ -199,10 +199,6 @@ void imx_media_try_colorimetry(struct v4l2_mbus_framefmt *tryfmt,
 int imx_media_mbus_fmt_to_pix_fmt(struct v4l2_pix_format *pix,
 				  const struct v4l2_mbus_framefmt *mbus,
 				  const struct imx_media_pixfmt *cc);
-int imx_media_mbus_fmt_to_ipu_image(struct ipu_image *image,
-				    const struct v4l2_mbus_framefmt *mbus);
-int imx_media_ipu_image_to_mbus_fmt(struct v4l2_mbus_framefmt *mbus,
-				    const struct ipu_image *image);
 void imx_media_grp_id_to_sd_name(char *sd_name, int sz,
 				 u32 grp_id, int ipu_id);
 struct v4l2_subdev *
-- 
2.31.1


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[PATCH v4 2/5] media: imx: Store the type of hardware implementation

[Dorota Czaplejewicz]

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The driver covers i.MX5/6, as well as i.MX7/8 hardware.
Those implementations differ, e.g. in the sizes of buffers they accept.

Some functionality should be abstracted, and storing type achieves that.

Signed-off-by: Dorota Czaplejewicz <dorota.czaplejewicz@puri.sm>
---
 drivers/staging/media/imx/imx-ic-prpencvf.c   | 3 ++-
 drivers/staging/media/imx/imx-media-capture.c | 5 ++++-
 drivers/staging/media/imx/imx-media-csi.c     | 3 ++-
 drivers/staging/media/imx/imx-media.h         | 8 +++++++-
 drivers/staging/media/imx/imx7-media-csi.c    | 3 ++-
 5 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/media/imx/imx-ic-prpencvf.c b/drivers/staging/media/imx/imx-ic-prpencvf.c
index d990553de87b..e06f5fbe5174 100644
--- a/drivers/staging/media/imx/imx-ic-prpencvf.c
+++ b/drivers/staging/media/imx/imx-ic-prpencvf.c
@@ -1265,7 +1265,8 @@ static int prp_registered(struct v4l2_subdev *sd)
 
 	priv->vdev = imx_media_capture_device_init(ic_priv->ipu_dev,
 						   &ic_priv->sd,
-						   PRPENCVF_SRC_PAD, true);
+						   PRPENCVF_SRC_PAD, true,
+						   DEVICE_TYPE_IMX56);
 	if (IS_ERR(priv->vdev))
 		return PTR_ERR(priv->vdev);
 
diff --git a/drivers/staging/media/imx/imx-media-capture.c b/drivers/staging/media/imx/imx-media-capture.c
index 93ba09236010..65dc95a48ecc 100644
--- a/drivers/staging/media/imx/imx-media-capture.c
+++ b/drivers/staging/media/imx/imx-media-capture.c
@@ -34,6 +34,7 @@ struct capture_priv {
 
 	struct imx_media_video_dev vdev;	/* Video device */
 	struct media_pad vdev_pad;		/* Video device pad */
+	enum imx_media_device_type type;	/* Type of hardware implementation */
 
 	struct v4l2_subdev *src_sd;		/* Source subdev */
 	int src_sd_pad;				/* Source subdev pad */
@@ -957,7 +958,8 @@ EXPORT_SYMBOL_GPL(imx_media_capture_device_unregister);
 
 struct imx_media_video_dev *
 imx_media_capture_device_init(struct device *dev, struct v4l2_subdev *src_sd,
-			      int pad, bool legacy_api)
+			      int pad, bool legacy_api,
+			      enum imx_media_device_type type)
 {
 	struct capture_priv *priv;
 	struct video_device *vfd;
@@ -972,6 +974,7 @@ imx_media_capture_device_init(struct device *dev, struct v4l2_subdev *src_sd,
 	priv->src_sd_pad = pad;
 	priv->dev = dev;
 	priv->legacy_api = legacy_api;
+	priv->type = type;
 
 	mutex_init(&priv->mutex);
 	INIT_LIST_HEAD(&priv->ready_q);
diff --git a/drivers/staging/media/imx/imx-media-csi.c b/drivers/staging/media/imx/imx-media-csi.c
index 6a94fff49bf6..b6758c3787c7 100644
--- a/drivers/staging/media/imx/imx-media-csi.c
+++ b/drivers/staging/media/imx/imx-media-csi.c
@@ -1794,7 +1794,8 @@ static int csi_registered(struct v4l2_subdev *sd)
 	}
 
 	priv->vdev = imx_media_capture_device_init(priv->sd.dev, &priv->sd,
-						   CSI_SRC_PAD_IDMAC, true);
+						   CSI_SRC_PAD_IDMAC, true,
+						   DEVICE_TYPE_IMX56);
 	if (IS_ERR(priv->vdev)) {
 		ret = PTR_ERR(priv->vdev);
 		goto free_fim;
diff --git a/drivers/staging/media/imx/imx-media.h b/drivers/staging/media/imx/imx-media.h
index d2a150aac6cd..08e0c94e2de1 100644
--- a/drivers/staging/media/imx/imx-media.h
+++ b/drivers/staging/media/imx/imx-media.h
@@ -96,6 +96,11 @@ enum imx_pixfmt_sel {
 	PIXFMT_SEL_ANY = PIXFMT_SEL_YUV | PIXFMT_SEL_RGB | PIXFMT_SEL_BAYER,
 };
 
+enum imx_media_device_type {
+	DEVICE_TYPE_IMX56,
+	DEVICE_TYPE_IMX78,
+};
+
 struct imx_media_buffer {
 	struct vb2_v4l2_buffer vbuf; /* v4l buffer must be first */
 	struct list_head  list;
@@ -282,7 +287,8 @@ int imx_media_ic_unregister(struct v4l2_subdev *sd);
 /* imx-media-capture.c */
 struct imx_media_video_dev *
 imx_media_capture_device_init(struct device *dev, struct v4l2_subdev *src_sd,
-			      int pad, bool legacy_api);
+			      int pad, bool legacy_api,
+			      enum imx_media_device_type type);
 void imx_media_capture_device_remove(struct imx_media_video_dev *vdev);
 int imx_media_capture_device_register(struct imx_media_video_dev *vdev,
 				      u32 link_flags);
diff --git a/drivers/staging/media/imx/imx7-media-csi.c b/drivers/staging/media/imx/imx7-media-csi.c
index d7dc0d8edf50..1a11f07620e9 100644
--- a/drivers/staging/media/imx/imx7-media-csi.c
+++ b/drivers/staging/media/imx/imx7-media-csi.c
@@ -1012,7 +1012,8 @@ static int imx7_csi_registered(struct v4l2_subdev *sd)
 	}
 
 	csi->vdev = imx_media_capture_device_init(csi->sd.dev, &csi->sd,
-						  IMX7_CSI_PAD_SRC, false);
+						  IMX7_CSI_PAD_SRC, false,
+						  DEVICE_TYPE_IMX78);
 	if (IS_ERR(csi->vdev))
 		return PTR_ERR(csi->vdev);
 
-- 
2.31.1


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[PATCH v4 3/5] media: imx: Forward type of hardware implementation

[Dorota Czaplejewicz]

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Signed-off-by: Dorota Czaplejewicz <dorota.czaplejewicz@puri.sm>
---
 drivers/staging/media/imx/imx-media-capture.c | 15 +++++++++------
 drivers/staging/media/imx/imx-media-utils.c   |  3 ++-
 drivers/staging/media/imx/imx-media.h         |  3 ++-
 3 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/drivers/staging/media/imx/imx-media-capture.c b/drivers/staging/media/imx/imx-media-capture.c
index 65dc95a48ecc..7a6384b3e5e6 100644
--- a/drivers/staging/media/imx/imx-media-capture.c
+++ b/drivers/staging/media/imx/imx-media-capture.c
@@ -139,7 +139,8 @@ static int capture_g_fmt_vid_cap(struct file *file, void *fh,
 }
 
 static const struct imx_media_pixfmt *
-__capture_try_fmt(struct v4l2_pix_format *pixfmt, struct v4l2_rect *compose)
+__capture_try_fmt(struct v4l2_pix_format *pixfmt, struct v4l2_rect *compose,
+		  enum imx_media_device_type type)
 {
 	struct v4l2_mbus_framefmt fmt_src;
 	const struct imx_media_pixfmt *cc;
@@ -171,7 +172,7 @@ __capture_try_fmt(struct v4l2_pix_format *pixfmt, struct v4l2_rect *compose)
 	}
 
 	v4l2_fill_mbus_format(&fmt_src, pixfmt, 0);
-	imx_media_mbus_fmt_to_pix_fmt(pixfmt, &fmt_src, cc);
+	imx_media_mbus_fmt_to_pix_fmt(pixfmt, &fmt_src, cc, type);
 
 	if (compose) {
 		compose->width = fmt_src.width;
@@ -184,7 +185,9 @@ __capture_try_fmt(struct v4l2_pix_format *pixfmt, struct v4l2_rect *compose)
 static int capture_try_fmt_vid_cap(struct file *file, void *fh,
 				   struct v4l2_format *f)
 {
-	__capture_try_fmt(&f->fmt.pix, NULL);
+	struct capture_priv *priv = video_drvdata(file);
+
+	__capture_try_fmt(&f->fmt.pix, NULL, priv->type);
 	return 0;
 }
 
@@ -199,7 +202,7 @@ static int capture_s_fmt_vid_cap(struct file *file, void *fh,
 		return -EBUSY;
 	}
 
-	cc = __capture_try_fmt(&f->fmt.pix, &priv->vdev.compose);
+	cc = __capture_try_fmt(&f->fmt.pix, &priv->vdev.compose, priv->type);
 
 	priv->vdev.cc = cc;
 	priv->vdev.fmt = f->fmt.pix;
@@ -418,7 +421,7 @@ __capture_legacy_try_fmt(struct capture_priv *priv,
 		}
 	}
 
-	imx_media_mbus_fmt_to_pix_fmt(pixfmt, &fmt_src->format, cc);
+	imx_media_mbus_fmt_to_pix_fmt(pixfmt, &fmt_src->format, cc, priv->type);
 
 	return cc;
 }
@@ -889,7 +892,7 @@ static int capture_init_format(struct capture_priv *priv)
 		fmt_src.format.height = IMX_MEDIA_DEF_PIX_HEIGHT;
 	}
 
-	imx_media_mbus_fmt_to_pix_fmt(&vdev->fmt, &fmt_src.format, NULL);
+	imx_media_mbus_fmt_to_pix_fmt(&vdev->fmt, &fmt_src.format, NULL, priv->type);
 	vdev->compose.width = fmt_src.format.width;
 	vdev->compose.height = fmt_src.format.height;
 
diff --git a/drivers/staging/media/imx/imx-media-utils.c b/drivers/staging/media/imx/imx-media-utils.c
index afa96e05ea7f..8b5c6bcfd4fa 100644
--- a/drivers/staging/media/imx/imx-media-utils.c
+++ b/drivers/staging/media/imx/imx-media-utils.c
@@ -518,7 +518,8 @@ EXPORT_SYMBOL_GPL(imx_media_try_colorimetry);
 
 int imx_media_mbus_fmt_to_pix_fmt(struct v4l2_pix_format *pix,
 				  const struct v4l2_mbus_framefmt *mbus,
-				  const struct imx_media_pixfmt *cc)
+				  const struct imx_media_pixfmt *cc,
+				  enum imx_media_device_type type)
 {
 	u32 width;
 	u32 stride;
diff --git a/drivers/staging/media/imx/imx-media.h b/drivers/staging/media/imx/imx-media.h
index 08e0c94e2de1..79adab775739 100644
--- a/drivers/staging/media/imx/imx-media.h
+++ b/drivers/staging/media/imx/imx-media.h
@@ -203,7 +203,8 @@ void imx_media_try_colorimetry(struct v4l2_mbus_framefmt *tryfmt,
 			       bool ic_route);
 int imx_media_mbus_fmt_to_pix_fmt(struct v4l2_pix_format *pix,
 				  const struct v4l2_mbus_framefmt *mbus,
-				  const struct imx_media_pixfmt *cc);
+				  const struct imx_media_pixfmt *cc,
+				  enum imx_media_device_type type);
 void imx_media_grp_id_to_sd_name(char *sd_name, int sz,
 				 u32 grp_id, int ipu_id);
 struct v4l2_subdev *
-- 
2.31.1


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[PATCH v4 4/5] media: imx: Use dedicated format handler for i.MX7/8

[Dorota Czaplejewicz]

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This splits out a format handler which takes into account
the capabilities of the i.MX7/8 video device,
as opposed to the default handler compatible with both i.MX5/6 and i.MX7/8.

Signed-off-by: Dorota Czaplejewicz <dorota.czaplejewicz@puri.sm>
---
 drivers/staging/media/imx/imx-media-utils.c | 58 +++++++++++++++++++--
 1 file changed, 54 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/media/imx/imx-media-utils.c b/drivers/staging/media/imx/imx-media-utils.c
index 8b5c6bcfd4fa..c0a84c79947e 100644
--- a/drivers/staging/media/imx/imx-media-utils.c
+++ b/drivers/staging/media/imx/imx-media-utils.c
@@ -516,10 +516,9 @@ void imx_media_try_colorimetry(struct v4l2_mbus_framefmt *tryfmt,
 }
 EXPORT_SYMBOL_GPL(imx_media_try_colorimetry);
 
-int imx_media_mbus_fmt_to_pix_fmt(struct v4l2_pix_format *pix,
-				  const struct v4l2_mbus_framefmt *mbus,
-				  const struct imx_media_pixfmt *cc,
-				  enum imx_media_device_type type)
+static int imx56_media_mbus_fmt_to_pix_fmt(struct v4l2_pix_format *pix,
+					   const struct v4l2_mbus_framefmt *mbus,
+					   const struct imx_media_pixfmt *cc)
 {
 	u32 width;
 	u32 stride;
@@ -568,6 +567,57 @@ int imx_media_mbus_fmt_to_pix_fmt(struct v4l2_pix_format *pix,
 
 	return 0;
 }
+
+static int imx78_media_mbus_fmt_to_pix_fmt(struct v4l2_pix_format *pix,
+					   const struct v4l2_mbus_framefmt *mbus,
+					   const struct imx_media_pixfmt *cc)
+{
+	int ret;
+
+	if (!cc)
+		cc = imx_media_find_mbus_format(mbus->code, PIXFMT_SEL_ANY);
+
+	if (!cc)
+		return -EINVAL;
+	/*
+	 * The hardware can handle line lengths divisible by 4 pixels
+	 * as long as the whole buffer size ends up divisible by 8 bytes.
+	 * If not, use the value of 8 pixels recommended in the datasheet.
+	 */
+	ret = v4l2_fill_pixfmt(pix, cc->fourcc,
+			       round_up(mbus->width, 4), mbus->height);
+	if (ret)
+		return ret;
+
+	/* Only 8bits-per-pixel formats may need to get aligned to 8 pixels,
+	 * because both 10-bit and 16-bit pixels occupy 2 bytes.
+	 * In those, 4-pixel aligmnent is equal to 8-byte alignment.
+	 */
+	if (pix->sizeimage % 8 != 0)
+		ret = v4l2_fill_pixfmt(pix, cc->fourcc,
+				       round_up(mbus->width, 8), mbus->height);
+
+	pix->colorspace = mbus->colorspace;
+	pix->xfer_func = mbus->xfer_func;
+	pix->ycbcr_enc = mbus->ycbcr_enc;
+	pix->quantization = mbus->quantization;
+	pix->field = mbus->field;
+
+	return ret;
+}
+
+int imx_media_mbus_fmt_to_pix_fmt(struct v4l2_pix_format *pix,
+				  const struct v4l2_mbus_framefmt *mbus,
+				  const struct imx_media_pixfmt *cc,
+				  enum imx_media_device_type type) {
+	switch (type) {
+	case DEVICE_TYPE_IMX56:
+		return imx56_media_mbus_fmt_to_pix_fmt(pix, mbus, cc);
+	case DEVICE_TYPE_IMX78:
+		return imx78_media_mbus_fmt_to_pix_fmt(pix, mbus, cc);
+	}
+	return -EINVAL;
+}
 EXPORT_SYMBOL_GPL(imx_media_mbus_fmt_to_pix_fmt);
 
 void imx_media_free_dma_buf(struct device *dev,
-- 
2.31.1


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[PATCH v4 5/5] media: imx: Fail conversion if pixel format not supported

[Dorota Czaplejewicz]

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imx_media_find_mbus_format has NULL as a valid return value,
therefore the caller should take it into account.

Signed-off-by: Dorota Czaplejewicz <dorota.czaplejewicz@puri.sm>
---
 drivers/staging/media/imx/imx-media-utils.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/staging/media/imx/imx-media-utils.c b/drivers/staging/media/imx/imx-media-utils.c
index c0a84c79947e..8646f6ba1108 100644
--- a/drivers/staging/media/imx/imx-media-utils.c
+++ b/drivers/staging/media/imx/imx-media-utils.c
@@ -544,6 +544,9 @@ static int imx56_media_mbus_fmt_to_pix_fmt(struct v4l2_pix_format *pix,
 		cc = imx_media_find_mbus_format(code, PIXFMT_SEL_YUV);
 	}
 
+	if (!cc)
+		return -EINVAL;
+
 	/* Round up width for minimum burst size */
 	width = round_up(mbus->width, 8);
 
-- 
2.31.1


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Re: [PATCH v4 1/5] media: imx: Remove unused functions

[Dorota Czaplejewicz]

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On Thu, 4 Nov 2021 12:41:53 +0100
Dorota Czaplejewicz <dorota.czaplejewicz@puri.sm> wrote:

> Neither imx_media_mbus_fmt_to_ipu_image nor imx_media_ipu_image_to_mbus_fmt
> were used anywhere.
> 
> Signed-off-by: Dorota Czaplejewicz <dorota.czaplejewicz@puri.sm>
> ---
> 
> Hi,
> 
> Compared to v3, this patch series introduces the checks of imx_media_find_mbus_format return values in patch 4 and 5.
> 
> Cheers,
> Dorota
> 

I should mention that this part from v3 still applies:

> The use of `v4l2_fill_pixfmt` comes with the downside of breaking 10-bit Bayer formats, or at least until my other series gets accepted

The other series is:

Message-id: 20211019114718.827400-1-dorota.czaplejewicz@puri.sm

https://lore.kernel.org/linux-media/20211019114718.827400-1-dorota.czaplejewicz@puri.sm/

Regards,
Dorota Czaplejewicz

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Re: [PATCH v4 2/5] media: imx: Store the type of hardware implementation

[Hans Verkuil]

Hi Dorota,

On 04/11/2021 12:43, Dorota Czaplejewicz wrote:
> The driver covers i.MX5/6, as well as i.MX7/8 hardware.
> Those implementations differ, e.g. in the sizes of buffers they accept.
> 
> Some functionality should be abstracted, and storing type achieves that.
> 
> Signed-off-by: Dorota Czaplejewicz <dorota.czaplejewicz@puri.sm>
> ---
>  drivers/staging/media/imx/imx-ic-prpencvf.c   | 3 ++-
>  drivers/staging/media/imx/imx-media-capture.c | 5 ++++-
>  drivers/staging/media/imx/imx-media-csi.c     | 3 ++-
>  drivers/staging/media/imx/imx-media.h         | 8 +++++++-
>  drivers/staging/media/imx/imx7-media-csi.c    | 3 ++-
>  5 files changed, 17 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/staging/media/imx/imx-ic-prpencvf.c b/drivers/staging/media/imx/imx-ic-prpencvf.c
> index d990553de87b..e06f5fbe5174 100644
> --- a/drivers/staging/media/imx/imx-ic-prpencvf.c
> +++ b/drivers/staging/media/imx/imx-ic-prpencvf.c
> @@ -1265,7 +1265,8 @@ static int prp_registered(struct v4l2_subdev *sd)
>  
>  	priv->vdev = imx_media_capture_device_init(ic_priv->ipu_dev,
>  						   &ic_priv->sd,
> -						   PRPENCVF_SRC_PAD, true);
> +						   PRPENCVF_SRC_PAD, true,
> +						   DEVICE_TYPE_IMX56);
>  	if (IS_ERR(priv->vdev))
>  		return PTR_ERR(priv->vdev);
>  
> diff --git a/drivers/staging/media/imx/imx-media-capture.c b/drivers/staging/media/imx/imx-media-capture.c
> index 93ba09236010..65dc95a48ecc 100644
> --- a/drivers/staging/media/imx/imx-media-capture.c
> +++ b/drivers/staging/media/imx/imx-media-capture.c
> @@ -34,6 +34,7 @@ struct capture_priv {
>  
>  	struct imx_media_video_dev vdev;	/* Video device */
>  	struct media_pad vdev_pad;		/* Video device pad */
> +	enum imx_media_device_type type;	/* Type of hardware implementation */
>  
>  	struct v4l2_subdev *src_sd;		/* Source subdev */
>  	int src_sd_pad;				/* Source subdev pad */
> @@ -957,7 +958,8 @@ EXPORT_SYMBOL_GPL(imx_media_capture_device_unregister);
>  
>  struct imx_media_video_dev *
>  imx_media_capture_device_init(struct device *dev, struct v4l2_subdev *src_sd,
> -			      int pad, bool legacy_api)
> +			      int pad, bool legacy_api,
> +			      enum imx_media_device_type type)
>  {
>  	struct capture_priv *priv;
>  	struct video_device *vfd;
> @@ -972,6 +974,7 @@ imx_media_capture_device_init(struct device *dev, struct v4l2_subdev *src_sd,
>  	priv->src_sd_pad = pad;
>  	priv->dev = dev;
>  	priv->legacy_api = legacy_api;
> +	priv->type = type;
>  
>  	mutex_init(&priv->mutex);
>  	INIT_LIST_HEAD(&priv->ready_q);
> diff --git a/drivers/staging/media/imx/imx-media-csi.c b/drivers/staging/media/imx/imx-media-csi.c
> index 6a94fff49bf6..b6758c3787c7 100644
> --- a/drivers/staging/media/imx/imx-media-csi.c
> +++ b/drivers/staging/media/imx/imx-media-csi.c
> @@ -1794,7 +1794,8 @@ static int csi_registered(struct v4l2_subdev *sd)
>  	}
>  
>  	priv->vdev = imx_media_capture_device_init(priv->sd.dev, &priv->sd,
> -						   CSI_SRC_PAD_IDMAC, true);
> +						   CSI_SRC_PAD_IDMAC, true,
> +						   DEVICE_TYPE_IMX56);
>  	if (IS_ERR(priv->vdev)) {
>  		ret = PTR_ERR(priv->vdev);
>  		goto free_fim;
> diff --git a/drivers/staging/media/imx/imx-media.h b/drivers/staging/media/imx/imx-media.h
> index d2a150aac6cd..08e0c94e2de1 100644
> --- a/drivers/staging/media/imx/imx-media.h
> +++ b/drivers/staging/media/imx/imx-media.h
> @@ -96,6 +96,11 @@ enum imx_pixfmt_sel {
>  	PIXFMT_SEL_ANY = PIXFMT_SEL_YUV | PIXFMT_SEL_RGB | PIXFMT_SEL_BAYER,
>  };
>  
> +enum imx_media_device_type {
> +	DEVICE_TYPE_IMX56,
> +	DEVICE_TYPE_IMX78,
> +};
> +
>  struct imx_media_buffer {
>  	struct vb2_v4l2_buffer vbuf; /* v4l buffer must be first */
>  	struct list_head  list;
> @@ -282,7 +287,8 @@ int imx_media_ic_unregister(struct v4l2_subdev *sd);
>  /* imx-media-capture.c */
>  struct imx_media_video_dev *
>  imx_media_capture_device_init(struct device *dev, struct v4l2_subdev *src_sd,
> -			      int pad, bool legacy_api);
> +			      int pad, bool legacy_api,
> +			      enum imx_media_device_type type);

I'm not so sure about creating an enum for this. Perhaps just a 'bool is_imx56'
would be sufficient. The argument name is also more understandable. And you also
don't have the issue of having to check for out-of-range type values.

Also, where is the device type set for imx8mq? I'm not all that familiar with
the imx code, but I don't see where imx8mq-mipi-csi2.c fills that in.

I will merge patch 1/5, that one makes sense, but I'll skip the others.

Regards,

	Hans

>  void imx_media_capture_device_remove(struct imx_media_video_dev *vdev);
>  int imx_media_capture_device_register(struct imx_media_video_dev *vdev,
>  				      u32 link_flags);
> diff --git a/drivers/staging/media/imx/imx7-media-csi.c b/drivers/staging/media/imx/imx7-media-csi.c
> index d7dc0d8edf50..1a11f07620e9 100644
> --- a/drivers/staging/media/imx/imx7-media-csi.c
> +++ b/drivers/staging/media/imx/imx7-media-csi.c
> @@ -1012,7 +1012,8 @@ static int imx7_csi_registered(struct v4l2_subdev *sd)
>  	}
>  
>  	csi->vdev = imx_media_capture_device_init(csi->sd.dev, &csi->sd,
> -						  IMX7_CSI_PAD_SRC, false);
> +						  IMX7_CSI_PAD_SRC, false,
> +						  DEVICE_TYPE_IMX78);
>  	if (IS_ERR(csi->vdev))
>  		return PTR_ERR(csi->vdev);
>  
>