samples: video: capture: Add condition for test pattern test

Add condition to do the test pattern fixture test only if the test
pattern control was successfully set.

Signed-off-by: Phi Bang Nguyen <[email protected]>

Author: ngphibang

samples/drivers/video/capture/src/main.c

@@ -246,6 +246,7 @@ int main(void)
 
 	/* Set controls */
 	struct video_control ctrl = {.id = VIDEO_CID_HFLIP, .val = 1};
+	int tp_set_ret = -ENOTSUP;
 
 	if (IS_ENABLED(CONFIG_VIDEO_CTRL_HFLIP)) {
 		video_set_ctrl(video_dev, &ctrl);
@@ -258,7 +259,7 @@ int main(void)
 
 	if (IS_ENABLED(CONFIG_TEST)) {
 		ctrl.id = VIDEO_CID_TEST_PATTERN;
-		video_set_ctrl(video_dev, &ctrl);
+		tp_set_ret = video_set_ctrl(video_dev, &ctrl);
 	}
 
 #if DT_HAS_CHOSEN(zephyr_display)
@@ -320,7 +321,9 @@ int main(void)
 			frame++, vbuf->bytesused, vbuf->timestamp);
 
 #ifdef CONFIG_TEST
-		if (is_colorbar_ok(vbuf->buffer, fmt)) {
+		if (tp_set_ret < 0) {
+			LOG_DBG("Test pattern control was not successful. Skip test");
+		} else if (is_colorbar_ok(vbuf->buffer, fmt)) {
 			LOG_DBG("Pattern OK!\n");
 		}
 #endif