media: s5p-mfc: Load firmware for each run in MFCv12.

In MFCv12, some section of firmware gets updated at each MFC run.
Hence we need to reload original firmware for each run at the start.

Cc: linux-fsd@tesla.com
Signed-off-by: Smitha T Murthy <smithatmurthy@gmail.com>
Signed-off-by: Aakarsh Jain <aakarsh.jain@samsung.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Author: Aakarsh Jain

drivers/media/platform/samsung/s5p-mfc/s5p_mfc_ctrl.c

@@ -51,8 +51,14 @@ int s5p_mfc_load_firmware(struct s5p_mfc_dev *dev)
 	 * into kernel. */
 	mfc_debug_enter();
 
-	if (dev->fw_get_done)
-		return 0;
+	/* In case of MFC v12, RET_SYS_INIT response from hardware fails due to
+	 * incorrect firmware transfer and therefore it is not able to initialize
+	 * the hardware. This causes failed response for SYS_INIT command when
+	 * MFC runs for second time. So, load the MFC v12 firmware for each run.
+	 */
+	if (!IS_MFCV12(dev))
+		if (dev->fw_get_done)
+			return 0;
 
 	for (i = MFC_FW_MAX_VERSIONS - 1; i >= 0; i--) {
 		if (!dev->variant->fw_name[i])