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drm/amdgpu: add a dev_pm_ops prepare callback (v2)

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as per:
https://www.kernel.org/doc/html/latest/driver-api/pm/devices.html

The prepare callback is required to support the DPM_FLAG_SMART_SUSPEND
driver flag.  This allows runtime pm to auto complete when the
system goes into suspend avoiding a wake up on suspend and on resume.
Apply this for hybrid gfx and BOCO systems where d3cold is
provided by the ACPI platform.

v2: check if device is runtime suspended in prepare.

Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2021-03-10 00:41:49 -05:00
parent ed098aa34c
commit e25443d276
1 changed files with 24 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

24
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
View file

@ -36,6 +36,7 @@
#include <linux/vga_switcheroo.h>
#include <drm/drm_probe_helper.h>
#include <linux/mmu_notifier.h>
#include <linux/suspend.h>
#include "amdgpu.h"
#include "amdgpu_irq.h"
@ -1403,6 +1404,27 @@ static void amdgpu_drv_delayed_reset_work_handler(struct work_struct *work)
return;
}
static int amdgpu_pmops_prepare(struct device *dev)
{
struct drm_device *drm_dev = dev_get_drvdata(dev);
/* Return a positive number here so
* DPM_FLAG_SMART_SUSPEND works properly
*/
if ((amdgpu_device_supports_atpx(drm_dev) &&
amdgpu_is_atpx_hybrid()) ||
amdgpu_device_supports_boco(drm_dev))
return pm_runtime_suspended(dev) &&
pm_suspend_via_firmware();
return 0;
}
static void amdgpu_pmops_complete(struct device *dev)
{
/* nothing to do */
}
static int amdgpu_pmops_suspend(struct device *dev)
{
struct drm_device *drm_dev = dev_get_drvdata(dev);
@ -1621,6 +1643,8 @@ long amdgpu_drm_ioctl(struct file *filp,
}
static const struct dev_pm_ops amdgpu_pm_ops = {
.prepare = amdgpu_pmops_prepare,
.complete = amdgpu_pmops_complete,
.suspend = amdgpu_pmops_suspend,
.resume = amdgpu_pmops_resume,
.freeze = amdgpu_pmops_freeze,