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drm/lima: enable runtime pm 

Enable runtime pm by default so GPU suspend when idle
for 200ms. This value can be changed by
autosuspend_delay_ms in device's power sysfs dir.

On Allwinner H3 lima_device_resume takes ~40us and
lima_device_suspend takes ~20us.

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/20200421133551.31481-11-yuq825@gmail.com
This commit is contained in:
Qiang Yu 2020-04-21 21:35:51 +08:00
parent 63945d5149
commit 50de2e9ebb
2 changed files with 52 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
drivers/gpu/drm/lima/lima_drv.c
View File

@ -404,6 +404,12 @@ static int lima_pdev_probe(struct platform_device *pdev)
goto err_out2;
}
pm_runtime_set_active(ldev->dev);
pm_runtime_mark_last_busy(ldev->dev);
pm_runtime_set_autosuspend_delay(ldev->dev, 200);
pm_runtime_use_autosuspend(ldev->dev);
pm_runtime_enable(ldev->dev);
/*
* Register the DRM device with the core and the connectors with
* sysfs.
@ -412,17 +418,16 @@ static int lima_pdev_probe(struct platform_device *pdev)
if (err < 0)
goto err_out3;
platform_set_drvdata(pdev, ldev);
if (sysfs_create_bin_file(&ldev->dev->kobj, &lima_error_state_attr))
dev_warn(ldev->dev, "fail to create error state sysfs\n");
return 0;
err_out3:
lima_device_fini(ldev);
err_out2:
pm_runtime_disable(ldev->dev);
lima_devfreq_fini(ldev);
err_out2:
lima_device_fini(ldev);
err_out1:
drm_dev_put(ddev);
err_out0:
@ -436,10 +441,16 @@ static int lima_pdev_remove(struct platform_device *pdev)
struct drm_device *ddev = ldev->ddev;
sysfs_remove_bin_file(&ldev->dev->kobj, &lima_error_state_attr);
platform_set_drvdata(pdev, NULL);
drm_dev_unregister(ddev);
/* stop autosuspend to make sure device is in active state */
pm_runtime_set_autosuspend_delay(ldev->dev, -1);
pm_runtime_disable(ldev->dev);
lima_devfreq_fini(ldev);
lima_device_fini(ldev);
drm_dev_put(ddev);
lima_sched_slab_fini();
return 0;

41
drivers/gpu/drm/lima/lima_sched.c
View File

@ -4,6 +4,7 @@
#include <linux/kthread.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/pm_runtime.h>
#include "lima_devfreq.h"
#include "lima_drv.h"
@ -194,13 +195,36 @@ static struct dma_fence *lima_sched_dependency(struct drm_sched_job *job,
return NULL;
}
static int lima_pm_busy(struct lima_device *ldev)
{
int ret;
/* resume GPU if it has been suspended by runtime PM */
ret = pm_runtime_get_sync(ldev->dev);
if (ret < 0)
return ret;
lima_devfreq_record_busy(&ldev->devfreq);
return 0;
}
static void lima_pm_idle(struct lima_device *ldev)
{
lima_devfreq_record_idle(&ldev->devfreq);
/* GPU can do auto runtime suspend */
pm_runtime_mark_last_busy(ldev->dev);
pm_runtime_put_autosuspend(ldev->dev);
}
static struct dma_fence *lima_sched_run_job(struct drm_sched_job *job)
{
struct lima_sched_task *task = to_lima_task(job);
struct lima_sched_pipe *pipe = to_lima_pipe(job->sched);
struct lima_device *ldev = pipe->ldev;
struct lima_fence *fence;
struct dma_fence *ret;
int i;
int i, err;
/* after GPU reset */
if (job->s_fence->finished.error < 0)
@ -209,6 +233,13 @@ static struct dma_fence *lima_sched_run_job(struct drm_sched_job *job)
fence = lima_fence_create(pipe);
if (!fence)
return NULL;
err = lima_pm_busy(ldev);
if (err < 0) {
dma_fence_put(&fence->base);
return NULL;
}
task->fence = &fence->base;
/* for caller usage of the fence, otherwise irq handler
@ -216,8 +247,6 @@ static struct dma_fence *lima_sched_run_job(struct drm_sched_job *job)
*/
ret = dma_fence_get(task->fence);
lima_devfreq_record_busy(&pipe->ldev->devfreq);
pipe->current_task = task;
/* this is needed for MMU to work correctly, otherwise GP/PP
@ -388,6 +417,7 @@ static void lima_sched_timedout_job(struct drm_sched_job *job)
{
struct lima_sched_pipe *pipe = to_lima_pipe(job->sched);
struct lima_sched_task *task = to_lima_task(job);
struct lima_device *ldev = pipe->ldev;
if (!pipe->error)
DRM_ERROR("lima job timeout\n");
@ -413,7 +443,7 @@ static void lima_sched_timedout_job(struct drm_sched_job *job)
pipe->current_vm = NULL;
pipe->current_task = NULL;
lima_devfreq_record_idle(&pipe->ldev->devfreq);
lima_pm_idle(ldev);
drm_sched_resubmit_jobs(&pipe->base);
drm_sched_start(&pipe->base, true);
@ -485,6 +515,7 @@ void lima_sched_pipe_fini(struct lima_sched_pipe *pipe)
void lima_sched_pipe_task_done(struct lima_sched_pipe *pipe)
{
struct lima_sched_task *task = pipe->current_task;
struct lima_device *ldev = pipe->ldev;
if (pipe->error) {
if (task && task->recoverable)
@ -495,6 +526,6 @@ void lima_sched_pipe_task_done(struct lima_sched_pipe *pipe)
pipe->task_fini(pipe);
dma_fence_signal(task->fence);
lima_devfreq_record_idle(&pipe->ldev->devfreq);
lima_pm_idle(ldev);
}
}