xref: /linux/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu9_baco.c (revision 40ccd6aa3e2e05be93394e3cd560c718dedfcc77)
1 /*
2  * Copyright 2018 Advanced Micro Devices, Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  */
23 #include "amdgpu.h"
24 #include "soc15.h"
25 #include "soc15_hw_ip.h"
26 #include "vega10_ip_offset.h"
27 #include "soc15_common.h"
28 #include "vega10_inc.h"
29 #include "smu9_baco.h"
30 
31 int smu9_get_bamaco_support(struct pp_hwmgr *hwmgr)
32 {
33 	struct amdgpu_device *adev = (struct amdgpu_device *)(hwmgr->adev);
34 	uint32_t reg, data;
35 
36 	if (!phm_cap_enabled(hwmgr->platform_descriptor.platformCaps, PHM_PlatformCaps_BACO))
37 		return 0;
38 
39 	WREG32(0x12074, 0xFFF0003B);
40 	data = RREG32(0x12075);
41 
42 	if (data == 0x1) {
43 		reg = RREG32_SOC15(NBIF, 0, mmRCC_BIF_STRAP0);
44 
45 		if (reg & RCC_BIF_STRAP0__STRAP_PX_CAPABLE_MASK)
46 			return BACO_SUPPORT;
47 	}
48 
49 	return 0;
50 }
51 
52 int smu9_baco_get_state(struct pp_hwmgr *hwmgr, enum BACO_STATE *state)
53 {
54 	struct amdgpu_device *adev = (struct amdgpu_device *)(hwmgr->adev);
55 	uint32_t reg;
56 
57 	reg = RREG32_SOC15(NBIF, 0, mmBACO_CNTL);
58 
59 	if (reg & BACO_CNTL__BACO_MODE_MASK)
60 		/* gfx has already entered BACO state */
61 		*state = BACO_STATE_IN;
62 	else
63 		*state = BACO_STATE_OUT;
64 	return 0;
65 }
66