V4L/DVB: V4L - vpfe capture - fix for kernel crash

As part of upstream merge, set_params() function was removed from isif.c.
This requires removal of BUG_ON() and check for set_params ptr in
vpfe_capture.c. Without this kernel crash dump is seen while bootup on DM365

Also made following changes:-

 1) converted error messages to debug messages since it is not right to flood
    the console with error messages for user mistakes.
 2) returns -EINVAL if ioctl is not supported
Signed-off-by: Muralidharan Karicheri <m-karicheri2@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/davinci/vpfe_capture.c

@@ -223,7 +223,6 @@ int vpfe_register_ccdc_device(struct ccdc_hw_device *dev)
 	BUG_ON(!dev->hw_ops.get_frame_format);
 	BUG_ON(!dev->hw_ops.get_pixel_format);
 	BUG_ON(!dev->hw_ops.set_pixel_format);
-	BUG_ON(!dev->hw_ops.set_params);
 	BUG_ON(!dev->hw_ops.set_image_window);
 	BUG_ON(!dev->hw_ops.get_image_window);
 	BUG_ON(!dev->hw_ops.get_line_length);
@@ -1689,11 +1688,12 @@ static long vpfe_param_handler(struct file *file, void *priv,
 	struct vpfe_device *vpfe_dev = video_drvdata(file);
 	int ret = 0;
 
-	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_param_handler\n");
+	v4l2_dbg(2, debug, &vpfe_dev->v4l2_dev, "vpfe_param_handler\n");
 
 	if (vpfe_dev->started) {
 		/* only allowed if streaming is not started */
-		v4l2_err(&vpfe_dev->v4l2_dev, "device already started\n");
+		v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
+			"device already started\n");
 		return -EBUSY;
 	}
 
@@ -1705,16 +1705,23 @@ static long vpfe_param_handler(struct file *file, void *priv,
 	case VPFE_CMD_S_CCDC_RAW_PARAMS:
 		v4l2_warn(&vpfe_dev->v4l2_dev,
 			  "VPFE_CMD_S_CCDC_RAW_PARAMS: experimental ioctl\n");
-		ret = ccdc_dev->hw_ops.set_params(param);
-		if (ret) {
-			v4l2_err(&vpfe_dev->v4l2_dev,
-				"Error in setting parameters in CCDC\n");
-			goto unlock_out;
-		}
-		if (vpfe_get_ccdc_image_format(vpfe_dev, &vpfe_dev->fmt) < 0) {
-			v4l2_err(&vpfe_dev->v4l2_dev,
-				"Invalid image format at CCDC\n");
-			goto unlock_out;
+		if (ccdc_dev->hw_ops.set_params) {
+			ret = ccdc_dev->hw_ops.set_params(param);
+			if (ret) {
+				v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
+					"Error setting parameters in CCDC\n");
+				goto unlock_out;
+			}
+			if (vpfe_get_ccdc_image_format(vpfe_dev,
+						       &vpfe_dev->fmt) < 0) {
+				v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
+					"Invalid image format at CCDC\n");
+				goto unlock_out;
+			}
+		} else {
+			ret = -EINVAL;
+			v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
+				"VPFE_CMD_S_CCDC_RAW_PARAMS not supported\n");
 		}
 		break;
 	default: