Signed-off-by: Mayuresh Kulkarni mkulkarni@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 }, };