1 files changed, 34 insertions, 1 deletions

diff --git a/drivers/gpu/drm/tegra/vic.c b/drivers/gpu/drm/tegra/vic.c
index 9f657a63b0bb..396f29f289f5 100644
--- a/drivers/gpu/drm/tegra/vic.c
+++ b/drivers/gpu/drm/tegra/vic.c
@@ -38,6 +38,7 @@ struct vic {
 	struct iommu_domain *domain;
 	struct device *dev;
 	struct clk *clk;
+	struct reset_control *rst;
 
 	/* Platform configuration */
 	const struct vic_config *config;
@@ -56,13 +57,37 @@ static void vic_writel(struct vic *vic, u32 value, unsigned int offset)
 static int vic_runtime_resume(struct device *dev)
 {
 	struct vic *vic = dev_get_drvdata(dev);
+	int err;
+
+	err = clk_prepare_enable(vic->clk);
+	if (err < 0)
+		return err;
+
+	usleep_range(10, 20);
+
+	err = reset_control_deassert(vic->rst);
+	if (err < 0)
+		goto disable;
+
+	usleep_range(10, 20);
+
+	return 0;
 
-	return clk_prepare_enable(vic->clk);
+disable:
+	clk_disable_unprepare(vic->clk);
+	return err;
 }
 
 static int vic_runtime_suspend(struct device *dev)
 {
 	struct vic *vic = dev_get_drvdata(dev);
+	int err;
+
+	err = reset_control_assert(vic->rst);
+	if (err < 0)
+		return err;
+
+	usleep_range(2000, 4000);
 
 	clk_disable_unprepare(vic->clk);
 
@@ -323,6 +348,14 @@ static int vic_probe(struct platform_device *pdev)
 		return PTR_ERR(vic->clk);
 	}
 
+	if (!dev->pm_domain) {
+		vic->rst = devm_reset_control_get(dev, "vic");
+		if (IS_ERR(vic->rst)) {
+			dev_err(&pdev->dev, "failed to get reset\n");
+			return PTR_ERR(vic->rst);
+		}
+	}
+
 	vic->falcon.dev = dev;
 	vic->falcon.regs = vic->regs;
 	vic->falcon.ops = &vic_falcon_ops;