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radeon_trinity_smc.c revision 1.1 
      1 /*	$NetBSD: radeon_trinity_smc.c,v 1.1 2018/08/27 14:38:20 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 1.1 2018/08/27 14:38:20 riastradh Exp $");
     28 
     29 #include "drmP.h"
     30 #include "radeon.h"
     31 #include "trinityd.h"
     32 #include "trinity_dpm.h"
     33 #include "ppsmc.h"
     34 
     35 static int trinity_notify_message_to_smu(struct radeon_device *rdev, u32 id)
     36 {
     37 	int i;
     38 	u32 v = 0;
     39 
     40 	WREG32(SMC_MESSAGE_0, id);
     41 	for (i = 0; i < rdev->usec_timeout; i++) {
     42 		if (RREG32(SMC_RESP_0) != 0)
     43 			break;
     44 		udelay(1);
     45 	}
     46 	v = RREG32(SMC_RESP_0);
     47 
     48 	if (v != 1) {
     49 		if (v == 0xFF) {
     50 			DRM_ERROR("SMC failed to handle the message!\n");
     51 			return -EINVAL;
     52 		} else if (v == 0xFE) {
     53 			DRM_ERROR("Unknown SMC message!\n");
     54 			return -EINVAL;
     55 		}
     56 	}
     57 
     58 	return 0;
     59 }
     60 
     61 int trinity_dpm_bapm_enable(struct radeon_device *rdev, bool enable)
     62 {
     63 	if (enable)
     64 		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_EnableBAPM);
     65 	else
     66 		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DisableBAPM);
     67 }
     68 
     69 int trinity_dpm_config(struct radeon_device *rdev, bool enable)
     70 {
     71 	if (enable)
     72 		WREG32_SMC(SMU_SCRATCH0, 1);
     73 	else
     74 		WREG32_SMC(SMU_SCRATCH0, 0);
     75 
     76 	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Config);
     77 }
     78 
     79 int trinity_dpm_force_state(struct radeon_device *rdev, u32 n)
     80 {
     81 	WREG32_SMC(SMU_SCRATCH0, n);
     82 
     83 	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_ForceState);
     84 }
     85 
     86 int trinity_dpm_n_levels_disabled(struct radeon_device *rdev, u32 n)
     87 {
     88 	WREG32_SMC(SMU_SCRATCH0, n);
     89 
     90 	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_N_LevelsDisabled);
     91 }
     92 
     93 int trinity_uvd_dpm_config(struct radeon_device *rdev)
     94 {
     95 	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_UVD_DPM_Config);
     96 }
     97 
     98 int trinity_dpm_no_forced_level(struct radeon_device *rdev)
     99 {
    100 	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_NoForcedLevel);
    101 }
    102 
    103 int trinity_dce_enable_voltage_adjustment(struct radeon_device *rdev,
    104 					  bool enable)
    105 {
    106 	if (enable)
    107 		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_AllowVoltageAdjustment);
    108 	else
    109 		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_RemoveVoltageAdjustment);
    110 }
    111 
    112 int trinity_gfx_dynamic_mgpg_config(struct radeon_device *rdev)
    113 {
    114 	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_PG_SIMD_Config);
    115 }
    116 
    117 void trinity_acquire_mutex(struct radeon_device *rdev)
    118 {
    119 	int i;
    120 
    121 	WREG32(SMC_INT_REQ, 1);
    122 	for (i = 0; i < rdev->usec_timeout; i++) {
    123 		if ((RREG32(SMC_INT_REQ) & 0xffff) == 1)
    124 			break;
    125 		udelay(1);
    126 	}
    127 }
    128 
    129 void trinity_release_mutex(struct radeon_device *rdev)
    130 {
    131 	WREG32(SMC_INT_REQ, 0);
    132 }
    133