From: Mateusz Krawczuk <m.krawczuk@partner.samsung.com>
Date: Sat, 21 Sep 2013 14:00:47 +0000 (-0300)
Subject: [media] s5p-tv: sdo: Restore vpll clock rate after streamoff
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=0495d405f319171ac1cb6276019fc49a382fa295;p=linux-beck.git

[media] s5p-tv: sdo: Restore vpll clock rate after streamoff

Restore vpll clock rate if start stream fail or stream is off.

Signed-off-by: Mateusz Krawczuk <m.krawczuk@partner.samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
[s.nawrocki@samsung.com: fixed whitespace error reported by checkpath.pl]
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---

diff --git a/drivers/media/platform/s5p-tv/sdo_drv.c b/drivers/media/platform/s5p-tv/sdo_drv.c
index 0afa90f0f6ab..fbc6d7ae7297 100644
--- a/drivers/media/platform/s5p-tv/sdo_drv.c
+++ b/drivers/media/platform/s5p-tv/sdo_drv.c
@@ -55,6 +55,8 @@ struct sdo_device {
 	struct clk *dacphy;
 	/** clock for control of VPLL */
 	struct clk *fout_vpll;
+	/** vpll rate before sdo stream was on */
+	unsigned long vpll_rate;
 	/** regulator for SDO IP power */
 	struct regulator *vdac;
 	/** regulator for SDO plug detection */
@@ -193,17 +195,33 @@ static int sdo_s_power(struct v4l2_subdev *sd, int on)
 
 static int sdo_streamon(struct sdo_device *sdev)
 {
+	int ret;
+
 	/* set proper clock for Timing Generator */
-	clk_set_rate(sdev->fout_vpll, 54000000);
+	sdev->vpll_rate = clk_get_rate(sdev->fout_vpll);
+	ret = clk_set_rate(sdev->fout_vpll, 54000000);
+	if (ret < 0) {
+		dev_err(sdev->dev, "Failed to set vpll rate\n");
+		return ret;
+	}
 	dev_info(sdev->dev, "fout_vpll.rate = %lu\n",
 	clk_get_rate(sdev->fout_vpll));
 	/* enable clock in SDO */
 	sdo_write_mask(sdev, SDO_CLKCON, ~0, SDO_TVOUT_CLOCK_ON);
-	clk_enable(sdev->dacphy);
+	ret = clk_enable(sdev->dacphy);
+	if (ret < 0) {
+		dev_err(sdev->dev, "clk_enable(dacphy) failed\n");
+		goto fail;
+	}
 	/* enable DAC */
 	sdo_write_mask(sdev, SDO_DAC, ~0, SDO_POWER_ON_DAC);
 	sdo_reg_debug(sdev);
 	return 0;
+
+fail:
+	sdo_write_mask(sdev, SDO_CLKCON, 0, SDO_TVOUT_CLOCK_ON);
+	clk_set_rate(sdev->fout_vpll, sdev->vpll_rate);
+	return ret;
 }
 
 static int sdo_streamoff(struct sdo_device *sdev)
@@ -220,6 +238,7 @@ static int sdo_streamoff(struct sdo_device *sdev)
 	}
 	if (tries == 0)
 		dev_err(sdev->dev, "failed to stop streaming\n");
+	clk_set_rate(sdev->fout_vpll, sdev->vpll_rate);
 	return tries ? 0 : -EIO;
 }