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drm/amdgpu: handle runtime pm in fbcon (v2)

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Ported from nouveau.

v2: re-enable runtime autosuspend in the error case

Acked-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2016-08-27 12:37:22 -04:00
parent 6861c837e2
commit 7c1fa1db54
1 changed files with 28 additions and 0 deletions
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28
drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
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@ -26,6 +26,7 @@
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/fb.h>
#include <linux/pm_runtime.h>
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
@ -48,8 +49,35 @@ struct amdgpu_fbdev {
struct amdgpu_device *adev;
};
static int
amdgpufb_open(struct fb_info *info, int user)
{
struct amdgpu_fbdev *rfbdev = info->par;
struct amdgpu_device *adev = rfbdev->adev;
int ret = pm_runtime_get_sync(adev->ddev->dev);
if (ret < 0 && ret != -EACCES) {
pm_runtime_mark_last_busy(adev->ddev->dev);
pm_runtime_put_autosuspend(adev->ddev->dev);
return ret;
}
return 0;
}
static int
amdgpufb_release(struct fb_info *info, int user)
{
struct amdgpu_fbdev *rfbdev = info->par;
struct amdgpu_device *adev = rfbdev->adev;
pm_runtime_mark_last_busy(adev->ddev->dev);
pm_runtime_put_autosuspend(adev->ddev->dev);
return 0;
}
static struct fb_ops amdgpufb_ops = {
.owner = THIS_MODULE,
.fb_open = amdgpufb_open,
.fb_release = amdgpufb_release,
.fb_check_var = drm_fb_helper_check_var,
.fb_set_par = drm_fb_helper_set_par,
.fb_fillrect = drm_fb_helper_cfb_fillrect,