drivers: video: sw_generator: fix video_sw_generator_enum_frmival()

Fix video_sw_generator_enum_frmival() only matching the first size of a
pixel format. The selection loop was stopping at the first matching pixel
format rather than pixel format + size pair.
Return an error on fie.index > 1 as there is only one framerate entry
per pixelformat.

Signed-off-by: Josuah Demangeon <me@josuah.net>

Author: josuah

drivers/video/video_sw_generator.c

@@ -280,13 +280,18 @@ static int video_sw_generator_enum_frmival(const struct device *dev, struct vide
 {
 	int i = 0;
 
-	while (fmts[i].pixelformat && (fmts[i].pixelformat != fie->format->pixelformat)) {
+	if (fie->index >= 1) {
+		return -ERANGE;
+	}
+
+	while (fmts[i].pixelformat && (fmts[i].pixelformat != fie->format->pixelformat) &&
+	       IN_RANGE(fie->format->width, fmts[i].width_min, fmts[i].width_max) &&
+	       IN_RANGE(fie->format->height, fmts[i].height_min, fmts[i].height_max)) {
 		i++;
 	}
 
-	if ((i == ARRAY_SIZE(fmts)) ||
-	    !IN_RANGE(fie->format->width, fmts[i].width_min, fmts[i].width_max) &&
-	    !IN_RANGE(fie->format->height, fmts[i].height_min, fmts[i].height_max)) {
+	if (i == ARRAY_SIZE(fmts) - 1) {
+		LOG_ERR("Nothing matching the requested format was found");
 		return -EINVAL;
 	}