video/rockchip: rga2: enable rga power when read rga version

[firefly-linux-kernel-4.4.55.git] / drivers / video / rockchip / rga2 / rga2_drv.c

diff --git a/drivers/video/rockchip/rga2/rga2_drv.c b/drivers/video/rockchip/rga2/rga2_drv.c
index 7030a55c01532ef1e2ce3a32a88f8e36e3b62f04..05c927518f171a8196bab70a63708ced351c69df 100644 (file)
--- 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;