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drm/amd: Add concept of running prepare_suspend() sequence for IP blocks

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If any IP blocks allocate memory during their hw_fini() sequence
this can cause the suspend to fail under memory pressure.  Introduce
a new phase that IP blocks can use to allocate memory before suspend
starts so that it can potentially be evicted into swap instead.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Mario Limonciello 2023-10-06 13:50:21 -05:00 • committed by Alex Deucher
parent 5095d54181
commit cb11ca3233
2 changed files with 12 additions and 1 deletions
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12
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
View file

@ -4348,7 +4348,7 @@ static int amdgpu_device_evict_resources(struct amdgpu_device *adev)
int amdgpu_device_prepare(struct drm_device *dev)
{
struct amdgpu_device *adev = drm_to_adev(dev);
int r;
int i, r;
if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;
@ -4358,6 +4358,16 @@ int amdgpu_device_prepare(struct drm_device *dev)
if (r)
return r;
for (i = 0; i < adev->num_ip_blocks; i++) {
if (!adev->ip_blocks[i].status.valid)
continue;
if (!adev->ip_blocks[i].version->funcs->prepare_suspend)
continue;
r = adev->ip_blocks[i].version->funcs->prepare_suspend((void *)adev);
if (r)
return r;
}
return 0;
}

1
drivers/gpu/drm/amd/include/amd_shared.h
View file

@ -299,6 +299,7 @@ struct amd_ip_funcs {
int (*hw_init)(void *handle);
int (*hw_fini)(void *handle);
void (*late_fini)(void *handle);
int (*prepare_suspend)(void *handle);
int (*suspend)(void *handle);
int (*resume)(void *handle);
bool (*is_idle)(void *handle);