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drm/lima: add pm resume/suspend ops

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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
This commit is contained in:
Qiang Yu 2020-04-21 21:35:50 +08:00
parent 7a475eb470
commit 63945d5149
3 changed files with 100 additions and 0 deletions
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90
drivers/gpu/drm/lima/lima_device.c
View File

@ -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;
}

3
drivers/gpu/drm/lima/lima_device.h
View File

@ -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

7
drivers/gpu/drm/lima/lima_drv.c
View File

@ -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,
},
};