media: vicodec: rename v4l2_fwht_default_fmt to v4l2_fwht_find_nth_fmt

Rename 'v4l2_fwht_default_fmt' to 'v4l2_fwht_find_nth_fmt'
and add a function 'v4l2_fwht_validate_fmt' to check if
a format info matches the parameters.
This function will also be used to validate the stateless
params when adding support for stateless codecs.
Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/vicodec/codec-v4l2-fwht.c

@@ -37,7 +37,19 @@ static const struct v4l2_fwht_pixfmt_info v4l2_fwht_pixfmts[] = {
 	{ V4L2_PIX_FMT_GREY,    1, 1, 1, 1, 0, 1, 1, 1, 1, FWHT_FL_PIXENC_RGB},
 };
 
-const struct v4l2_fwht_pixfmt_info *v4l2_fwht_default_fmt(u32 width_div,
+bool v4l2_fwht_validate_fmt(const struct v4l2_fwht_pixfmt_info *info,
+			    u32 width_div, u32 height_div, u32 components_num,
+			    u32 pixenc)
+{
+	if (info->width_div == width_div &&
+	    info->height_div == height_div &&
+	    (!pixenc || info->pixenc == pixenc) &&
+	    info->components_num == components_num)
+		return true;
+	return false;
+}
+
+const struct v4l2_fwht_pixfmt_info *v4l2_fwht_find_nth_fmt(u32 width_div,
 							  u32 height_div,
 							  u32 components_num,
 							  u32 pixenc,
@@ -46,10 +58,10 @@ const struct v4l2_fwht_pixfmt_info *v4l2_fwht_default_fmt(u32 width_div,
 	unsigned int i;
 
 	for (i = 0; i < ARRAY_SIZE(v4l2_fwht_pixfmts); i++) {
-		if (v4l2_fwht_pixfmts[i].width_div == width_div &&
-		    v4l2_fwht_pixfmts[i].height_div == height_div &&
-		    (!pixenc || v4l2_fwht_pixfmts[i].pixenc == pixenc) &&
-		    v4l2_fwht_pixfmts[i].components_num == components_num) {
+		bool is_valid = v4l2_fwht_validate_fmt(&v4l2_fwht_pixfmts[i],
+						       width_div, height_div,
+						       components_num, pixenc);
+		if (is_valid) {
 			if (start_idx == 0)
 				return v4l2_fwht_pixfmts + i;
 			start_idx--;

drivers/media/platform/vicodec/codec-v4l2-fwht.h

@@ -48,7 +48,10 @@ struct v4l2_fwht_state {
 
 const struct v4l2_fwht_pixfmt_info *v4l2_fwht_find_pixfmt(u32 pixelformat);
 const struct v4l2_fwht_pixfmt_info *v4l2_fwht_get_pixfmt(u32 idx);
-const struct v4l2_fwht_pixfmt_info *v4l2_fwht_default_fmt(u32 width_div,
+bool v4l2_fwht_validate_fmt(const struct v4l2_fwht_pixfmt_info *info,
+			    u32 width_div, u32 height_div, u32 components_num,
+			    u32 pixenc);
+const struct v4l2_fwht_pixfmt_info *v4l2_fwht_find_nth_fmt(u32 width_div,
 							  u32 height_div,
 							  u32 components_num,
 							  u32 pixenc,

drivers/media/platform/vicodec/vicodec-core.c

@@ -401,7 +401,7 @@ info_from_header(const struct fwht_cframe_hdr *p_hdr)
 				FWHT_FL_COMPONENTS_NUM_OFFSET);
 		pixenc = (flags & FWHT_FL_PIXENC_MSK);
 	}
-	return v4l2_fwht_default_fmt(width_div, height_div,
+	return v4l2_fwht_find_nth_fmt(width_div, height_div,
 				     components_num, pixenc, 0);
 }
 
@@ -622,7 +622,7 @@ static int enum_fmt(struct v4l2_fmtdesc *f, struct vicodec_ctx *ctx,
 		if (!info || ctx->is_enc)
 			info = v4l2_fwht_get_pixfmt(f->index);
 		else
-			info = v4l2_fwht_default_fmt(info->width_div,
+			info = v4l2_fwht_find_nth_fmt(info->width_div,
 						     info->height_div,
 						     info->components_num,
 						     info->pixenc,