From: Mark Yao <mark.yao@rock-chips.com>
Date: Wed, 22 Mar 2017 02:10:32 +0000 (+0800)
Subject: video/rockchip: rga2: enable rga power when read rga version
X-Git-Tag: firefly_0821_release~262
X-Git-Url: http://plrg.eecs.uci.edu/git/?p=firefly-linux-kernel-4.4.55.git;a=commitdiff_plain;h=830239e9c93392b60eb5d955f74224820a076418

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

Change-Id: Ib2a704b8f75f4b792dc5a70ed58c0b9306c2793c
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
---

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;