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authorQiang Yu <yuq825@gmail.com>2020-04-21 21:35:50 +0800
committerQiang Yu <yuq825@gmail.com>2020-04-24 20:51:19 +0800
commit63945d51490f16aede6d635e785faf56521e5e4a (patch)
treee4bc1915f491fa4c7f8857c19d07efb0cdde7556
parent7a475eb470ac482306c9281b2faadf2cbfb6b84c (diff)
drm/lima: add pm resume/suspend ops
Add driver pm system and runtime hardware resume/suspend ops. Note this won't enable runtime pm of the device yet. v2: Do clock and power gating when suspend/resume. Tested-by: Bhushan Shah <bshah@kde.org> Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com> Signed-off-by: Qiang Yu <yuq825@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200421133551.31481-10-yuq825@gmail.com
-rw-r--r--drivers/gpu/drm/lima/lima_device.c90
-rw-r--r--drivers/gpu/drm/lima/lima_device.h3
-rw-r--r--drivers/gpu/drm/lima/lima_drv.c7
3 files changed, 100 insertions, 0 deletions
diff --git a/drivers/gpu/drm/lima/lima_device.c b/drivers/gpu/drm/lima/lima_device.c
index 1d9b7f415da1..65fdca366e41 100644
--- a/drivers/gpu/drm/lima/lima_device.c
+++ b/drivers/gpu/drm/lima/lima_device.c
@@ -247,6 +247,27 @@ 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;
@@ -441,3 +462,72 @@ 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;
+
+ err = lima_clk_enable(ldev);
+ if (err) {
+ dev_err(dev, "resume clk fail %d\n", err);
+ return err;
+ }
+
+ err = lima_regulator_enable(ldev);
+ if (err) {
+ dev_err(dev, "resume regulator fail %d\n", err);
+ goto err_out0;
+ }
+
+ for (i = 0; i < lima_ip_num; i++) {
+ err = lima_resume_ip(ldev, i);
+ if (err) {
+ dev_err(dev, "resume ip %d fail\n", i);
+ goto err_out1;
+ }
+ }
+
+ err = lima_devfreq_resume(&ldev->devfreq);
+ if (err) {
+ dev_err(dev, "devfreq resume fail\n");
+ goto err_out1;
+ }
+
+ return 0;
+
+err_out1:
+ while (--i >= 0)
+ lima_suspend_ip(ldev, i);
+ lima_regulator_disable(ldev);
+err_out0:
+ lima_clk_disable(ldev);
+ 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) {
+ dev_err(dev, "devfreq suspend fail\n");
+ return err;
+ }
+
+ for (i = lima_ip_num - 1; i >= 0; i--)
+ lima_suspend_ip(ldev, i);
+
+ lima_regulator_disable(ldev);
+
+ lima_clk_disable(ldev);
+
+ return 0;
+}
diff --git a/drivers/gpu/drm/lima/lima_device.h b/drivers/gpu/drm/lima/lima_device.h
index d9df1b45dfa9..41b9d7b4bcc7 100644
--- a/drivers/gpu/drm/lima/lima_device.h
+++ b/drivers/gpu/drm/lima/lima_device.h
@@ -140,4 +140,7 @@ 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 3d63d496cfc2..f3fe0a2f764b 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>
@@ -451,11 +452,17 @@ 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,
},
};