media: imx: utils: Add ability to filter pixel formats by mbus code

Add a media bus code argument to the imx_media_enum_pixel_formats(). If
set to a non-zero value, the function will only consider pixel formats
that match the given media bus code.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/imx/imx-media-capture.c

@@ -174,7 +174,8 @@ static int capture_enum_fmt_vid_cap(struct file *file, void *fh,
 			(cc_src->cs == IPUV3_COLORSPACE_YUV) ?
 			PIXFMT_SEL_YUV : PIXFMT_SEL_RGB;
 
-		ret = imx_media_enum_pixel_formats(&fourcc, f->index, fmt_sel);
+		ret = imx_media_enum_pixel_formats(&fourcc, f->index, fmt_sel,
+						   0);
 		if (ret)
 			return ret;
 	} else {
@@ -223,7 +224,7 @@ static int __capture_try_fmt_vid_cap(struct capture_priv *priv,
 
 		cc = imx_media_find_pixel_format(fourcc, fmt_sel);
 		if (!cc) {
-			imx_media_enum_pixel_formats(&fourcc, 0, fmt_sel);
+			imx_media_enum_pixel_formats(&fourcc, 0, fmt_sel, 0);
 			cc = imx_media_find_pixel_format(fourcc, fmt_sel);
 		}
 	} else {

drivers/staging/media/imx/imx-media-csc-scaler.c

@@ -167,7 +167,7 @@ static int ipu_csc_scaler_enum_fmt(struct file *file, void *fh,
 	int ret;
 
 	ret = imx_media_enum_pixel_formats(&fourcc, f->index,
-					   PIXFMT_SEL_YUV_RGB);
+					   PIXFMT_SEL_YUV_RGB, 0);
 	if (ret)
 		return ret;
 

drivers/staging/media/imx/imx-media-utils.c

@@ -283,9 +283,11 @@ EXPORT_SYMBOL_GPL(imx_media_find_mbus_format);
  * @index: The requested match index.
  * @fmt_sel: Include in the enumeration entries with the given selection
  *           criteria.
+ * @code: If non-zero, only include in the enumeration entries matching this
+ *	media bus code.
  */
 int imx_media_enum_pixel_formats(u32 *fourcc, u32 index,
-				 enum imx_pixfmt_sel fmt_sel)
+				 enum imx_pixfmt_sel fmt_sel, u32 code)
 {
 	bool sel_ipu = fmt_sel & PIXFMT_SEL_IPU;
 	unsigned int i;
@@ -306,6 +308,25 @@ int imx_media_enum_pixel_formats(u32 *fourcc, u32 index,
 		if (!(fmt_sel & sel))
 			continue;
 
+		/*
+		 * If a media bus code is specified, only consider formats that
+		 * match it.
+		 */
+		if (code) {
+			unsigned int j;
+
+			if (!fmt->codes)
+				continue;
+
+			for (j = 0; fmt->codes[j]; j++) {
+				if (code == fmt->codes[j])
+					break;
+			}
+
+			if (!fmt->codes[j])
+				continue;
+		}
+
 		if (index == 0) {
 			*fourcc = fmt->fourcc;
 			return 0;

drivers/staging/media/imx/imx-media.h

@@ -170,7 +170,7 @@ struct imx_media_dev {
 const struct imx_media_pixfmt *
 imx_media_find_pixel_format(u32 fourcc, enum imx_pixfmt_sel sel);
 int imx_media_enum_pixel_formats(u32 *fourcc, u32 index,
-				 enum imx_pixfmt_sel sel);
+				 enum imx_pixfmt_sel sel, u32 code);
 const struct imx_media_pixfmt *
 imx_media_find_mbus_format(u32 code, enum imx_pixfmt_sel sel);
 int imx_media_enum_mbus_formats(u32 *code, u32 index,