Signed-off-by: Mayuresh Kulkarni <mkulka...@nvidia.com>
---
drivers/gpu/host1x/dev.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 57 insertions(+)
diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c
index 28e28a2..b43eb29 100644
--- a/drivers/gpu/host1x/dev.c
+++ b/drivers/gpu/host1x/dev.c
@@ -23,6 +23,7 @@
#include <linux/of_device.h>
#include <linux/clk.h>
#include <linux/io.h>
+#include <linux/pm_runtime.h>
#define CREATE_TRACE_POINTS
#include <trace/events/host1x.h>
@@ -143,11 +144,16 @@ static int host1x_probe(struct platform_device *pdev)
return err;
}
+#ifdef CONFIG_PM_RUNTIME
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_get_sync(&pdev->dev);
+#else
err = clk_prepare_enable(host->clk);
if (err < 0) {
dev_err(&pdev->dev, "failed to enable clock\n");
return err;
}
+#endif
err = host1x_syncpt_init(host);
if (err) {
@@ -165,10 +171,17 @@ static int host1x_probe(struct platform_device *pdev)
host1x_drm_alloc(pdev);
+#ifdef CONFIG_PM_RUNTIME
+ pm_runtime_put(&pdev->dev);
+#endif
+
return 0;
fail_deinit_syncpt:
host1x_syncpt_deinit(host);
+#ifdef CONFIG_PM_RUNTIME
+ pm_runtime_put(&pdev->dev);
+#endif
return err;
}
@@ -179,10 +192,51 @@ static int __exit host1x_remove(struct platform_device
*pdev)
host1x_intr_deinit(host);
host1x_syncpt_deinit(host);
clk_disable_unprepare(host->clk);
+#ifdef CONFIG_PM_RUNTIME
+ pm_runtime_disable(&pdev->dev);
+#endif
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_RUNTIME
+static int host1x_runtime_suspend(struct device *dev)
+{
+ struct host1x *host;
+
+ host = dev_get_drvdata(dev);
+ if (!host)
+ return -EINVAL;
+
+ clk_disable_unprepare(host->clk);
return 0;
}
+static int host1x_runtime_resume(struct device *dev)
+{
+ int err = 0;
+ struct host1x *host;
+
+ host = dev_get_drvdata(dev);
+ if (!host)
+ return -EINVAL;
+
+ err = clk_prepare_enable(host->clk);
+ if (err < 0)
+ dev_err(dev, "failed to enable clock\n");
+
+ return err;
+}
+#endif /* CONFIG_PM_RUNTIME */
+
+#ifdef CONFIG_PM
+static const struct dev_pm_ops host1x_pm_ops = {
+ SET_RUNTIME_PM_OPS(host1x_runtime_suspend,
+ host1x_runtime_resume, NULL)
+};
+#endif
+
static struct platform_driver tegra_host1x_driver = {
.probe = host1x_probe,
.remove = __exit_p(host1x_remove),
@@ -190,6 +244,9 @@ static struct platform_driver tegra_host1x_driver = {
.owner = THIS_MODULE,
.name = "tegra-host1x",
.of_match_table = host1x_of_match,
+#ifdef CONFIG_PM
+ .pm = &host1x_pm_ops,
+#endif
},
};
--
1.8.1.5
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