1 /*
2  * Copyright 2012 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 
24 #include <drm/drmP.h>
25 #include "radeon.h"
26 #include "trinityd.h"
27 #include "trinity_dpm.h"
28 #include "ppsmc.h"
29 
30 static int trinity_notify_message_to_smu(struct radeon_device *rdev, u32 id)
31 {
32 	int i;
33 	u32 v = 0;
34 
35 	WREG32(SMC_MESSAGE_0, id);
36 	for (i = 0; i < rdev->usec_timeout; i++) {
37 		if (RREG32(SMC_RESP_0) != 0)
38 			break;
39 		udelay(1);
40 	}
41 	v = RREG32(SMC_RESP_0);
42 
43 	if (v != 1) {
44 		if (v == 0xFF) {
45 			DRM_ERROR("SMC failed to handle the message!\n");
46 			return -EINVAL;
47 		} else if (v == 0xFE) {
48 			DRM_ERROR("Unknown SMC message!\n");
49 			return -EINVAL;
50 		}
51 	}
52 
53 	return 0;
54 }
55 
56 int trinity_dpm_bapm_enable(struct radeon_device *rdev, bool enable)
57 {
58 	if (enable)
59 		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_EnableBAPM);
60 	else
61 		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DisableBAPM);
62 }
63 
64 int trinity_dpm_config(struct radeon_device *rdev, bool enable)
65 {
66 	if (enable)
67 		WREG32_SMC(SMU_SCRATCH0, 1);
68 	else
69 		WREG32_SMC(SMU_SCRATCH0, 0);
70 
71 	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Config);
72 }
73 
74 int trinity_dpm_force_state(struct radeon_device *rdev, u32 n)
75 {
76 	WREG32_SMC(SMU_SCRATCH0, n);
77 
78 	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_ForceState);
79 }
80 
81 int trinity_dpm_n_levels_disabled(struct radeon_device *rdev, u32 n)
82 {
83 	WREG32_SMC(SMU_SCRATCH0, n);
84 
85 	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_N_LevelsDisabled);
86 }
87 
88 int trinity_uvd_dpm_config(struct radeon_device *rdev)
89 {
90 	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_UVD_DPM_Config);
91 }
92 
93 int trinity_dpm_no_forced_level(struct radeon_device *rdev)
94 {
95 	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_NoForcedLevel);
96 }
97 
98 int trinity_dce_enable_voltage_adjustment(struct radeon_device *rdev,
99 					  bool enable)
100 {
101 	if (enable)
102 		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_AllowVoltageAdjustment);
103 	else
104 		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_RemoveVoltageAdjustment);
105 }
106 
107 int trinity_gfx_dynamic_mgpg_config(struct radeon_device *rdev)
108 {
109 	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_PG_SIMD_Config);
110 }
111 
112 void trinity_acquire_mutex(struct radeon_device *rdev)
113 {
114 	int i;
115 
116 	WREG32(SMC_INT_REQ, 1);
117 	for (i = 0; i < rdev->usec_timeout; i++) {
118 		if ((RREG32(SMC_INT_REQ) & 0xffff) == 1)
119 			break;
120 		udelay(1);
121 	}
122 }
123 
124 void trinity_release_mutex(struct radeon_device *rdev)
125 {
126 	WREG32(SMC_INT_REQ, 0);
127 }
128