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From f1b5a8092a0aa022b2083cdab25645d700a9e07e Mon Sep 17 00:00:00 2001
From: Rex Zhu <Rex.Zhu@amd.com>
Date: Thu, 19 Jul 2018 11:48:36 -0500
Subject: [PATCH 5059/5725] 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>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c | 20 +++++++++++++++++---
1 file changed, 17 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c
index 663634c..b1be634 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c
@@ -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;
@@ -498,8 +500,10 @@ 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);
@@ -557,11 +561,21 @@ 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;
}
--
2.7.4
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