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drm/amdgpu: add s0i3 capacity check for s0i3 routine (v2)

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add amdgpu_acpi_is_s0ix_supported() to check the platform
whether support s0i3.

v2: fix empty function parameters warning (void)

Signed-off-by: Prike Liang <Prike.Liang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Prike Liang 2020-09-09 10:55:39 +08:00 • committed by Alex Deucher
parent fec3124dc6
commit 4cd078dc65
2 changed files with 16 additions and 0 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu.h
View file

@ -1311,9 +1311,11 @@ int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev);
void amdgpu_acpi_get_backlight_caps(struct amdgpu_device *adev,
struct amdgpu_dm_backlight_caps *caps);
bool amdgpu_acpi_is_s0ix_supported(void);
#else
static inline int amdgpu_acpi_init(struct amdgpu_device *adev) { return 0; }
static inline void amdgpu_acpi_fini(struct amdgpu_device *adev) { }
static inline bool amdgpu_acpi_is_s0ix_supported(void) { return false; }
#endif
int amdgpu_cs_find_mapping(struct amdgpu_cs_parser *parser,

14
drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
View file

@ -27,6 +27,7 @@
#include <linux/power_supply.h>
#include <linux/pm_runtime.h>
#include <acpi/video.h>
#include <acpi/actbl.h>
#include <drm/drm_crtc_helper.h>
#include "amdgpu.h"
@ -894,3 +895,16 @@ void amdgpu_acpi_fini(struct amdgpu_device *adev)
unregister_acpi_notifier(&adev->acpi_nb);
kfree(adev->atif);
}
/**
* amdgpu_acpi_is_s0ix_supported
*
* returns true if supported, false if not.
*/
bool amdgpu_acpi_is_s0ix_supported(void)
{
if (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)
return true;
return false;
}