X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=drivers%2Fvideo%2Frockchip%2Frga2%2Frga2_drv.c;h=05c927518f171a8196bab70a63708ced351c69df;hb=830239e9c93392b60eb5d955f74224820a076418;hp=7030a55c01532ef1e2ce3a32a88f8e36e3b62f04;hpb=e9fd218be301e8d23141e9d073323089bc6a16a0;p=firefly-linux-kernel-4.4.55.git

diff --git a/drivers/video/rockchip/rga2/rga2_drv.c b/drivers/video/rockchip/rga2/rga2_drv.c
index 7030a55c0153..05c927518f17 100644
--- a/drivers/video/rockchip/rga2/rga2_drv.c
+++ b/drivers/video/rockchip/rga2/rga2_drv.c
@@ -159,8 +159,22 @@ static inline int rga2_init_version(void)
 		pr_err("rga2_drvdata is null\n");
 		return -EINVAL;
 	}
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0))
+	pm_runtime_get_sync(rga2_drvdata->dev);
+#endif
+
+	clk_prepare_enable(rga2_drvdata->aclk_rga2);
+	clk_prepare_enable(rga2_drvdata->hclk_rga2);
 
 	reg_version = rga2_read(0x028);
+
+	clk_disable_unprepare(rga2_drvdata->aclk_rga2);
+	clk_disable_unprepare(rga2_drvdata->hclk_rga2);
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0))
+	pm_runtime_put(rga2_drvdata->dev);
+#endif
+
 	major_version = (reg_version & RGA2_MAJOR_VERSION_MASK) >> 24;
 	minor_version = (reg_version & RGA2_MINOR_VERSION_MASK) >> 20;