[PATCH v4 03/11] media: imx8-isi: Support mbus_code filtering in format enumeration

[Guoniu Zhou <guoniu.zhou@oss.nxp.com>]

Extend mxc_isi_format_enum() to accept a v4l2_fmtdesc pointer instead
of a plain index, so it can filter formats by mbus_code when set. This
is used by the capture path to enumerate only formats compatible with
the connected subdev output.

For the M2M device, the V4L2 framework clears mbus_code to 0 for
devices without V4L2_CAP_IO_MC (v4l2-ioctl.c), so this change has no
effect on M2M format enumeration.

Signed-off-by: Guoniu Zhou <guoniu.zhou@oss.nxp.com>
---
Changes in v4:
- New patch
---
 drivers/media/platform/nxp/imx8-isi/imx8-isi-core.h  | 2 +-
 drivers/media/platform/nxp/imx8-isi/imx8-isi-m2m.c   | 2 +-
 drivers/media/platform/nxp/imx8-isi/imx8-isi-video.c | 6 +++++-
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/media/platform/nxp/imx8-isi/imx8-isi-core.h b/drivers/media/platform/nxp/imx8-isi/imx8-isi-core.h
index 58b47335afc7..a30633a7e2e9 100644
--- a/drivers/media/platform/nxp/imx8-isi/imx8-isi-core.h
+++ b/drivers/media/platform/nxp/imx8-isi/imx8-isi-core.h
@@ -322,7 +322,7 @@ mxc_isi_bus_format_by_index(unsigned int index, unsigned int pad);
 const struct mxc_isi_format_info *
 mxc_isi_format_by_fourcc(u32 fourcc, enum mxc_isi_video_type type);
 const struct mxc_isi_format_info *
-mxc_isi_format_enum(unsigned int index, enum mxc_isi_video_type type);
+mxc_isi_format_enum(const struct v4l2_fmtdesc *f, enum mxc_isi_video_type type);
 const struct mxc_isi_format_info *
 mxc_isi_format_try(struct mxc_isi_pipe *pipe, struct v4l2_pix_format_mplane *pix,
 		   enum mxc_isi_video_type type);
diff --git a/drivers/media/platform/nxp/imx8-isi/imx8-isi-m2m.c b/drivers/media/platform/nxp/imx8-isi/imx8-isi-m2m.c
index b729eecad0fe..1178947bb548 100644
--- a/drivers/media/platform/nxp/imx8-isi/imx8-isi-m2m.c
+++ b/drivers/media/platform/nxp/imx8-isi/imx8-isi-m2m.c
@@ -492,7 +492,7 @@ static int mxc_isi_m2m_enum_fmt_vid(struct file *file, void *fh,
 		MXC_ISI_VIDEO_M2M_OUT : MXC_ISI_VIDEO_M2M_CAP;
 	const struct mxc_isi_format_info *info;
 
-	info = mxc_isi_format_enum(f->index, type);
+	info = mxc_isi_format_enum(f, type);
 	if (!info)
 		return -EINVAL;
 
diff --git a/drivers/media/platform/nxp/imx8-isi/imx8-isi-video.c b/drivers/media/platform/nxp/imx8-isi/imx8-isi-video.c
index f45c2aae59ce..0d87a1082727 100644
--- a/drivers/media/platform/nxp/imx8-isi/imx8-isi-video.c
+++ b/drivers/media/platform/nxp/imx8-isi/imx8-isi-video.c
@@ -482,13 +482,17 @@ mxc_isi_format_by_fourcc(u32 fourcc, enum mxc_isi_video_type type)
 }
 
 const struct mxc_isi_format_info *
-mxc_isi_format_enum(unsigned int index, enum mxc_isi_video_type type)
+mxc_isi_format_enum(const struct v4l2_fmtdesc *f, enum mxc_isi_video_type type)
 {
+	unsigned int index = f->index;
 	unsigned int i;
 
 	for (i = 0; i < ARRAY_SIZE(mxc_isi_formats); i++) {
 		const struct mxc_isi_format_info *fmt = &mxc_isi_formats[i];
 
+		if (f->mbus_code && fmt->mbus_code != f->mbus_code)
+			continue;
+
 		if (!(fmt->type & type))
 			continue;
 

-- 
2.34.1