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drm/amdgpu: Power down acp if board uses AZ (v2) 

if board uses AZ rather than ACP, we power down acp
through smu to save power.

v2: handle S3/S4 and hw_fini (Alex)

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Rex Zhu 2018-07-19 11:48:36 -05:00 committed by Alex Deucher
parent 982976d92f
commit be2d6aa51e
1 changed files with 17 additions and 3 deletions
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20
drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c
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@ -289,10 +289,12 @@ static int acp_hw_init(void *handle)
r = amd_acp_hw_init(adev->acp.cgs_device,
ip_block->version->major, ip_block->version->minor);
/* -ENODEV means board uses AZ rather than ACP */
if (r == -ENODEV)
if (r == -ENODEV) {
amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_ACP, true);
return 0;
else if (r)
} else if (r) {
return r;
}
if (adev->rmmio_size == 0 || adev->rmmio_size < 0x5289)
return -EINVAL;
@ -497,8 +499,10 @@ static int acp_hw_fini(void *handle)
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
/* return early if no ACP */
if (!adev->acp.acp_cell)
if (!adev->acp.acp_cell) {
amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_ACP, false);
return 0;
}
/* Assert Soft reset of ACP */
val = cgs_read_register(adev->acp.cgs_device, mmACP_SOFT_RESET);
@ -556,11 +560,21 @@ static int acp_hw_fini(void *handle)
static int acp_suspend(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
/* power up on suspend */
if (!adev->acp.acp_cell)
amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_ACP, false);
return 0;
}
static int acp_resume(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
/* power down again on resume */
if (!adev->acp.acp_cell)
amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_ACP, true);
return 0;
}