1 /* $NetBSD: radeon_trinity_smc.c,v 1.2 2021/12/18 23:45:43 riastradh Exp $ */
2
3 /*
4 * Copyright 2012 Advanced Micro Devices, Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 */
25
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: radeon_trinity_smc.c,v 1.2 2021/12/18 23:45:43 riastradh Exp $");
28
29 #include "radeon.h"
30 #include "trinityd.h"
31 #include "trinity_dpm.h"
32 #include "ppsmc.h"
33
trinity_notify_message_to_smu(struct radeon_device * rdev,u32 id)34 static int trinity_notify_message_to_smu(struct radeon_device *rdev, u32 id)
35 {
36 int i;
37 u32 v = 0;
38
39 WREG32(SMC_MESSAGE_0, id);
40 for (i = 0; i < rdev->usec_timeout; i++) {
41 if (RREG32(SMC_RESP_0) != 0)
42 break;
43 udelay(1);
44 }
45 v = RREG32(SMC_RESP_0);
46
47 if (v != 1) {
48 if (v == 0xFF) {
49 DRM_ERROR("SMC failed to handle the message!\n");
50 return -EINVAL;
51 } else if (v == 0xFE) {
52 DRM_ERROR("Unknown SMC message!\n");
53 return -EINVAL;
54 }
55 }
56
57 return 0;
58 }
59
trinity_dpm_bapm_enable(struct radeon_device * rdev,bool enable)60 int trinity_dpm_bapm_enable(struct radeon_device *rdev, bool enable)
61 {
62 if (enable)
63 return trinity_notify_message_to_smu(rdev, PPSMC_MSG_EnableBAPM);
64 else
65 return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DisableBAPM);
66 }
67
trinity_dpm_config(struct radeon_device * rdev,bool enable)68 int trinity_dpm_config(struct radeon_device *rdev, bool enable)
69 {
70 if (enable)
71 WREG32_SMC(SMU_SCRATCH0, 1);
72 else
73 WREG32_SMC(SMU_SCRATCH0, 0);
74
75 return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Config);
76 }
77
trinity_dpm_force_state(struct radeon_device * rdev,u32 n)78 int trinity_dpm_force_state(struct radeon_device *rdev, u32 n)
79 {
80 WREG32_SMC(SMU_SCRATCH0, n);
81
82 return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_ForceState);
83 }
84
trinity_dpm_n_levels_disabled(struct radeon_device * rdev,u32 n)85 int trinity_dpm_n_levels_disabled(struct radeon_device *rdev, u32 n)
86 {
87 WREG32_SMC(SMU_SCRATCH0, n);
88
89 return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_N_LevelsDisabled);
90 }
91
trinity_uvd_dpm_config(struct radeon_device * rdev)92 int trinity_uvd_dpm_config(struct radeon_device *rdev)
93 {
94 return trinity_notify_message_to_smu(rdev, PPSMC_MSG_UVD_DPM_Config);
95 }
96
trinity_dpm_no_forced_level(struct radeon_device * rdev)97 int trinity_dpm_no_forced_level(struct radeon_device *rdev)
98 {
99 return trinity_notify_message_to_smu(rdev, PPSMC_MSG_NoForcedLevel);
100 }
101
trinity_dce_enable_voltage_adjustment(struct radeon_device * rdev,bool enable)102 int trinity_dce_enable_voltage_adjustment(struct radeon_device *rdev,
103 bool enable)
104 {
105 if (enable)
106 return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_AllowVoltageAdjustment);
107 else
108 return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_RemoveVoltageAdjustment);
109 }
110
trinity_gfx_dynamic_mgpg_config(struct radeon_device * rdev)111 int trinity_gfx_dynamic_mgpg_config(struct radeon_device *rdev)
112 {
113 return trinity_notify_message_to_smu(rdev, PPSMC_MSG_PG_SIMD_Config);
114 }
115
trinity_acquire_mutex(struct radeon_device * rdev)116 void trinity_acquire_mutex(struct radeon_device *rdev)
117 {
118 int i;
119
120 WREG32(SMC_INT_REQ, 1);
121 for (i = 0; i < rdev->usec_timeout; i++) {
122 if ((RREG32(SMC_INT_REQ) & 0xffff) == 1)
123 break;
124 udelay(1);
125 }
126 }
127
trinity_release_mutex(struct radeon_device * rdev)128 void trinity_release_mutex(struct radeon_device *rdev)
129 {
130 WREG32(SMC_INT_REQ, 0);
131 }
132