linux/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_baco.c

/*
 * Copyright 2018 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 */
#include "amdgpu.h"
#include "soc15.h"
#include "soc15_hw_ip.h"
#include "soc15_common.h"
#include "vega20_inc.h"
#include "vega20_ppsmc.h"
#include "vega20_baco.h"



static const struct soc15_baco_cmd_entry clean_baco_tbl[] =
{
	{CMD_WRITE, SOC15_REG_ENTRY(NBIF, 0, mmBIOS_SCRATCH_6), 0, 0, 0, 0},
	{CMD_WRITE, SOC15_REG_ENTRY(NBIF, 0, mmBIOS_SCRATCH_7), 0, 0, 0, 0},
};

int vega20_baco_get_capability(struct pp_hwmgr *hwmgr, bool *cap)
{
	struct amdgpu_device *adev = (struct amdgpu_device *)(hwmgr->adev);
	uint32_t reg;

	*cap = false;
	if (!phm_cap_enabled(hwmgr->platform_descriptor.platformCaps, PHM_PlatformCaps_BACO))
		return 0;

	if (((RREG32(0x17569) & 0x20000000) >> 29) == 0x1) {
		reg = RREG32_SOC15(NBIF, 0, mmRCC_BIF_STRAP0);

		if (reg & RCC_BIF_STRAP0__STRAP_PX_CAPABLE_MASK)
			*cap = true;
	}

	return 0;
}

int vega20_baco_get_state(struct pp_hwmgr *hwmgr, enum BACO_STATE *state)
{
	struct amdgpu_device *adev = (struct amdgpu_device *)(hwmgr->adev);
	uint32_t reg;

	reg = RREG32_SOC15(NBIF, 0, mmBACO_CNTL);

	if (reg & BACO_CNTL__BACO_MODE_MASK)
		/* gfx has already entered BACO state */
		*state = BACO_STATE_IN;
	else
		*state = BACO_STATE_OUT;
	return 0;
}

int vega20_baco_set_state(struct pp_hwmgr *hwmgr, enum BACO_STATE state)
{
	struct amdgpu_device *adev = (struct amdgpu_device *)(hwmgr->adev);
	enum BACO_STATE cur_state;
	uint32_t data;

	vega20_baco_get_state(hwmgr, &cur_state);

	if (cur_state == state)
		/* aisc already in the target state */
		return 0;

	if (state == BACO_STATE_IN) {
		data = RREG32_SOC15(THM, 0, mmTHM_BACO_CNTL);
		data |= 0x80000000;
		WREG32_SOC15(THM, 0, mmTHM_BACO_CNTL, data);


		if(smum_send_msg_to_smc_with_parameter(hwmgr, PPSMC_MSG_EnterBaco, 0))
			return -1;

	} else if (state == BACO_STATE_OUT) {
		if (smum_send_msg_to_smc(hwmgr, PPSMC_MSG_ExitBaco))
			return -1;
		if (!soc15_baco_program_registers(hwmgr, clean_baco_tbl,
						     ARRAY_SIZE(clean_baco_tbl)))
			return -1;
	}

	return 0;
}