radeon_trinity_smc.c revision 1.2 
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
34static 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
60int 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
68int 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
78int 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
85int 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
92int trinity_uvd_dpm_config(struct radeon_device *rdev)
93{
94	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_UVD_DPM_Config);
95}
96
97int trinity_dpm_no_forced_level(struct radeon_device *rdev)
98{
99	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_NoForcedLevel);
100}
101
102int 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
111int 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
116void 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
128void trinity_release_mutex(struct radeon_device *rdev)
129{
130	WREG32(SMC_INT_REQ, 0);
131}
132