Do hardware resume/suspend.
Tested-by: Bhushan Shah <bshah@xxxxxxx>
Signed-off-by: Qiang Yu <yuq825@xxxxxxxxx>
---
drivers/gpu/drm/lima/lima_device.c | 65 ++++++++++++++++++++++++++++++
drivers/gpu/drm/lima/lima_device.h | 3 ++
drivers/gpu/drm/lima/lima_drv.c | 7 ++++
3 files changed, 75 insertions(+)
diff --git a/drivers/gpu/drm/lima/lima_device.c b/drivers/gpu/drm/lima/lima_device.c
index e5f1f84ba85a..aca2cab9899b 100644
--- a/drivers/gpu/drm/lima/lima_device.c
+++ b/drivers/gpu/drm/lima/lima_device.c
@@ -213,6 +213,27 @@ static void lima_fini_ip(struct lima_device *ldev, int index)
desc->fini(ip);
}
+static int lima_resume_ip(struct lima_device *ldev, int index)
+{
+ struct lima_ip_desc *desc = lima_ip_desc + index;
+ struct lima_ip *ip = ldev->ip + index;
+ int ret = 0;
+
+ if (ip->present)
+ ret = desc->resume(ip);
+
+ return ret;
+}
+
+static void lima_suspend_ip(struct lima_device *ldev, int index)
+{
+ struct lima_ip_desc *desc = lima_ip_desc + index;
+ struct lima_ip *ip = ldev->ip + index;
+
+ if (ip->present)
+ desc->suspend(ip);
+}
+
static int lima_init_gp_pipe(struct lima_device *dev)
{
struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_gp;
@@ -408,3 +429,47 @@ void lima_device_fini(struct lima_device *ldev)
lima_clk_fini(ldev);
}
+
+int lima_device_resume(struct device *dev)
+{
+ struct lima_device *ldev = dev_get_drvdata(dev);
+ int i, err;
+
+ for (i = 0; i < lima_ip_num; i++) {
+ err = lima_resume_ip(ldev, i);
+ if (err)
+ goto err_out;
+ }
+
+ err = lima_devfreq_resume(&ldev->devfreq);
+ if (err)
+ goto err_out;
+
+ return 0;
+
+err_out:
+ while (--i >= 0)
+ lima_suspend_ip(ldev, i);
+ return err;
+}
+
+int lima_device_suspend(struct device *dev)
+{
+ struct lima_device *ldev = dev_get_drvdata(dev);
+ int i, err;
+
+ /* check any task running */
+ for (i = 0; i < lima_pipe_num; i++) {
+ if (atomic_read(&ldev->pipe[i].base.hw_rq_count))
+ return -EBUSY;
+ }
+
+ err = lima_devfreq_suspend(&ldev->devfreq);
+ if (err)
+ return err;
+
+ for (i = lima_ip_num - 1; i >= 0; i--)
+ lima_suspend_ip(ldev, i);
+
+ return 0;
+}
diff --git a/drivers/gpu/drm/lima/lima_device.h b/drivers/gpu/drm/lima/lima_device.h
index 095a0b5f1703..e06d1955f4a3 100644
--- a/drivers/gpu/drm/lima/lima_device.h
+++ b/drivers/gpu/drm/lima/lima_device.h
@@ -141,4 +141,7 @@ static inline int lima_poll_timeout(struct lima_ip *ip, lima_poll_func_t func,
return 0;
}
+int lima_device_suspend(struct device *dev);
+int lima_device_resume(struct device *dev);
+
#endif
diff --git a/drivers/gpu/drm/lima/lima_drv.c b/drivers/gpu/drm/lima/lima_drv.c
index bbbdc8455e2f..be66b448d44e 100644
--- a/drivers/gpu/drm/lima/lima_drv.c
+++ b/drivers/gpu/drm/lima/lima_drv.c
@@ -5,6 +5,7 @@
#include <linux/of_platform.h>
#include <linux/uaccess.h>
#include <linux/slab.h>
+#include <linux/pm_runtime.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_drv.h>
#include <drm/drm_prime.h>
@@ -452,11 +453,17 @@ static const struct of_device_id dt_match[] = {
};
MODULE_DEVICE_TABLE(of, dt_match);
+static const struct dev_pm_ops lima_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
+ SET_RUNTIME_PM_OPS(lima_device_suspend, lima_device_resume, NULL)
+};
+
static struct platform_driver lima_platform_driver = {
.probe = lima_pdev_probe,
.remove = lima_pdev_remove,
.driver = {
.name = "lima",
+ .pm = &lima_pm_ops,
.of_match_table = dt_match,
},
};
--
2.17.1
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