/*
 * 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 <linux/firmware.h>

#include "amdgpu.h"
#include "amdgpu_vcn.h"
#include "soc15.h"
#include "soc15d.h"
#include "amdgpu_pm.h"
#include "amdgpu_psp.h"

#include "vcn/vcn_2_0_0_offset.h"
#include "vcn/vcn_2_0_0_sh_mask.h"
#include "ivsrcid/vcn/irqsrcs_vcn_2_0.h"

#define mmUVD_CONTEXT_ID_INTERNAL_OFFSET			0x1fd
#define mmUVD_GPCOM_VCPU_CMD_INTERNAL_OFFSET			0x503
#define mmUVD_GPCOM_VCPU_DATA0_INTERNAL_OFFSET			0x504
#define mmUVD_GPCOM_VCPU_DATA1_INTERNAL_OFFSET			0x505
#define mmUVD_NO_OP_INTERNAL_OFFSET				0x53f
#define mmUVD_GP_SCRATCH8_INTERNAL_OFFSET			0x54a
#define mmUVD_SCRATCH9_INTERNAL_OFFSET				0xc01d

#define mmUVD_LMI_RBC_IB_VMID_INTERNAL_OFFSET			0x1e1
#define mmUVD_LMI_RBC_IB_64BIT_BAR_HIGH_INTERNAL_OFFSET 	0x5a6
#define mmUVD_LMI_RBC_IB_64BIT_BAR_LOW_INTERNAL_OFFSET		0x5a7
#define mmUVD_RBC_IB_SIZE_INTERNAL_OFFSET			0x1e2

static void vcn_v2_0_set_dec_ring_funcs(struct amdgpu_device *adev);
static void vcn_v2_0_set_enc_ring_funcs(struct amdgpu_device *adev);
static void vcn_v2_0_set_irq_funcs(struct amdgpu_device *adev);
static int vcn_v2_0_set_powergating_state(void *handle,
				enum amd_powergating_state state);
static int vcn_v2_0_pause_dpg_mode(struct amdgpu_device *adev,
				int inst_idx, struct dpg_pause_state *new_state);

/**
 * vcn_v2_0_early_init - set function pointers
 *
 * @handle: amdgpu_device pointer
 *
 * Set ring and irq function pointers
 */
static int vcn_v2_0_early_init(void *handle)
{
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;

	adev->vcn.num_vcn_inst = 1;
	adev->vcn.num_enc_rings = 2;

	vcn_v2_0_set_dec_ring_funcs(adev);
	vcn_v2_0_set_enc_ring_funcs(adev);
	vcn_v2_0_set_irq_funcs(adev);

	return 0;
}

/**
 * vcn_v2_0_sw_init - sw init for VCN block
 *
 * @handle: amdgpu_device pointer
 *
 * Load firmware and sw initialization
 */
static int vcn_v2_0_sw_init(void *handle)
{
	struct amdgpu_ring *ring;
	int i, r;
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;

	/* VCN DEC TRAP */
	r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_VCN,
			      VCN_2_0__SRCID__UVD_SYSTEM_MESSAGE_INTERRUPT,
			      &adev->vcn.inst->irq);
	if (r)
		return r;

	/* VCN ENC TRAP */
	for (i = 0; i < adev->vcn.num_enc_rings; ++i) {
		r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_VCN,
				      i + VCN_2_0__SRCID__UVD_ENC_GENERAL_PURPOSE,
				      &adev->vcn.inst->irq);
		if (r)
			return r;
	}

	r = amdgpu_vcn_sw_init(adev);
	if (r)
		return r;

	if (adev->firmware.load_type == AMDGPU_FW_LOAD_PSP) {
		const struct common_firmware_header *hdr;
		hdr = (const struct common_firmware_header *)adev->vcn.fw->data;
		adev->firmware.ucode[AMDGPU_UCODE_ID_VCN].ucode_id = AMDGPU_UCODE_ID_VCN;
		adev->firmware.ucode[AMDGPU_UCODE_ID_VCN].fw = adev->vcn.fw;
		adev->firmware.fw_size +=
			ALIGN(le32_to_cpu(hdr->ucode_size_bytes), PAGE_SIZE);
		DRM_INFO("PSP loading VCN firmware\n");
	}

	r = amdgpu_vcn_resume(adev);
	if (r)
		return r;

	ring = &adev->vcn.inst->ring_dec;

	ring->use_doorbell = true;
	ring->doorbell_index = adev->doorbell_index.vcn.vcn_ring0_1 << 1;

	sprintf(ring->name, "vcn_dec");
	r = amdgpu_ring_init(adev, ring, 512, &adev->vcn.inst->irq, 0);
	if (r)
		return r;

	adev->vcn.internal.context_id = mmUVD_CONTEXT_ID_INTERNAL_OFFSET;
	adev->vcn.internal.ib_vmid = mmUVD_LMI_RBC_IB_VMID_INTERNAL_OFFSET;
	adev->vcn.internal.ib_bar_low = mmUVD_LMI_RBC_IB_64BIT_BAR_LOW_INTERNAL_OFFSET;
	adev->vcn.internal.ib_bar_high = mmUVD_LMI_RBC_IB_64BIT_BAR_HIGH_INTERNAL_OFFSET;
	adev->vcn.internal.ib_size = mmUVD_RBC_IB_SIZE_INTERNAL_OFFSET;
	adev->vcn.internal.gp_scratch8 = mmUVD_GP_SCRATCH8_INTERNAL_OFFSET;

	adev->vcn.internal.scratch9 = mmUVD_SCRATCH9_INTERNAL_OFFSET;
	adev->vcn.inst->external.scratch9 = SOC15_REG_OFFSET(UVD, 0, mmUVD_SCRATCH9);
	adev->vcn.internal.data0 = mmUVD_GPCOM_VCPU_DATA0_INTERNAL_OFFSET;
	adev->vcn.inst->external.data0 = SOC15_REG_OFFSET(UVD, 0, mmUVD_GPCOM_VCPU_DATA0);
	adev->vcn.internal.data1 = mmUVD_GPCOM_VCPU_DATA1_INTERNAL_OFFSET;
	adev->vcn.inst->external.data1 = SOC15_REG_OFFSET(UVD, 0, mmUVD_GPCOM_VCPU_DATA1);
	adev->vcn.internal.cmd = mmUVD_GPCOM_VCPU_CMD_INTERNAL_OFFSET;
	adev->vcn.inst->external.cmd = SOC15_REG_OFFSET(UVD, 0, mmUVD_GPCOM_VCPU_CMD);
	adev->vcn.internal.nop = mmUVD_NO_OP_INTERNAL_OFFSET;
	adev->vcn.inst->external.nop = SOC15_REG_OFFSET(UVD, 0, mmUVD_NO_OP);

	for (i = 0; i < adev->vcn.num_enc_rings; ++i) {
		ring = &adev->vcn.inst->ring_enc[i];
		ring->use_doorbell = true;
		ring->doorbell_index = (adev->doorbell_index.vcn.vcn_ring0_1 << 1) + 2 + i;
		sprintf(ring->name, "vcn_enc%d", i);
		r = amdgpu_ring_init(adev, ring, 512, &adev->vcn.inst->irq, 0);
		if (r)
			return r;
	}

	adev->vcn.pause_dpg_mode = vcn_v2_0_pause_dpg_mode;

	return 0;
}

/**
 * vcn_v2_0_sw_fini - sw fini for VCN block
 *
 * @handle: amdgpu_device pointer
 *
 * VCN suspend and free up sw allocation
 */
static int vcn_v2_0_sw_fini(void *handle)
{
	int r;
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;

	r = amdgpu_vcn_suspend(adev);
	if (r)
		return r;

	r = amdgpu_vcn_sw_fini(adev);

	return r;
}

/**
 * vcn_v2_0_hw_init - start and test VCN block
 *
 * @handle: amdgpu_device pointer
 *
 * Initialize the hardware, boot up the VCPU and do some testing
 */
static int vcn_v2_0_hw_init(void *handle)
{
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
	struct amdgpu_ring *ring = &adev->vcn.inst->ring_dec;
	int i, r;

	adev->nbio.funcs->vcn_doorbell_range(adev, ring->use_doorbell,
					     ring->doorbell_index, 0);

	r = amdgpu_ring_test_helper(ring);
	if (r)
		goto done;

	for (i = 0; i < adev->vcn.num_enc_rings; ++i) {
		ring = &adev->vcn.inst->ring_enc[i];
		r = amdgpu_ring_test_helper(ring);
		if (r)
			goto done;
	}

done:
	if (!r)
		DRM_INFO("VCN decode and encode initialized successfully(under %s).\n",
			(adev->pg_flags & AMD_PG_SUPPORT_VCN_DPG)?"DPG Mode":"SPG Mode");

	return r;
}

/**
 * vcn_v2_0_hw_fini - stop the hardware block
 *
 * @handle: amdgpu_device pointer
 *
 * Stop the VCN block, mark ring as not ready any more
 */
static int vcn_v2_0_hw_fini(void *handle)
{
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
	struct amdgpu_ring *ring = &adev->vcn.inst->ring_dec;
	int i;

	if ((adev->pg_flags & AMD_PG_SUPPORT_VCN_DPG) ||
	    (adev->vcn.cur_state != AMD_PG_STATE_GATE &&
	      RREG32_SOC15(VCN, 0, mmUVD_STATUS)))
		vcn_v2_0_set_powergating_state(adev, AMD_PG_STATE_GATE);

	ring->sched.ready = false;

	for (i = 0; i < adev->vcn.num_enc_rings; ++i) {
		ring = &adev->vcn.inst->ring_enc[i];
		ring->sched.ready = false;
	}

	return 0;
}

/**
 * vcn_v2_0_suspend - suspend VCN block
 *
 * @handle: amdgpu_device pointer
 *
 * HW fini and suspend VCN block
 */
static int vcn_v2_0_suspend(void *handle)
{
	int r;
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;

	r = vcn_v2_0_hw_fini(adev);
	if (r)
		return r;

	r = amdgpu_vcn_suspend(adev);

	return r;
}

/**
 * vcn_v2_0_resume - resume VCN block
 *
 * @handle: amdgpu_device pointer
 *
 * Resume firmware and hw init VCN block
 */
static int vcn_v2_0_resume(void *handle)
{
	int r;
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;

	r = amdgpu_vcn_resume(adev);
	if (r)
		return r;

	r = vcn_v2_0_hw_init(adev);

	return r;
}

/**
 * vcn_v2_0_mc_resume - memory controller programming
 *
 * @adev: amdgpu_device pointer
 *
 * Let the VCN memory controller know it's offsets
 */
static void vcn_v2_0_mc_resume(struct amdgpu_device *adev)
{
	uint32_t size = AMDGPU_GPU_PAGE_ALIGN(adev->vcn.fw->size + 4);
	uint32_t offset;

	/* cache window 0: fw */
	if (adev->firmware.load_type == AMDGPU_FW_LOAD_PSP) {
		WREG32_SOC15(UVD, 0, mmUVD_LMI_VCPU_CACHE_64BIT_BAR_LOW,
			(adev->firmware.ucode[AMDGPU_UCODE_ID_VCN].tmr_mc_addr_lo));
		WREG32_SOC15(UVD, 0, mmUVD_LMI_VCPU_CACHE_64BIT_BAR_HIGH,
			(adev->firmware.ucode[AMDGPU_UCODE_ID_VCN].tmr_mc_addr_hi));
		WREG32_SOC15(UVD, 0, mmUVD_VCPU_CACHE_OFFSET0, 0);
		offset = 0;
	} else {
		WREG32_SOC15(UVD, 0, mmUVD_LMI_VCPU_CACHE_64BIT_BAR_LOW,
			lower_32_bits(adev->vcn.inst->gpu_addr));
		WREG32_SOC15(UVD, 0, mmUVD_LMI_VCPU_CACHE_64BIT_BAR_HIGH,
			upper_32_bits(adev->vcn.inst->gpu_addr));
		offset = size;
		WREG32_SOC15(UVD, 0, mmUVD_VCPU_CACHE_OFFSET0,
			AMDGPU_UVD_FIRMWARE_OFFSET >> 3);
	}

	WREG32_SOC15(UVD, 0, mmUVD_VCPU_CACHE_SIZE0, size);

	/* cache window 1: stack */
	WREG32_SOC15(UVD, 0, mmUVD_LMI_VCPU_CACHE1_64BIT_BAR_LOW,
		lower_32_bits(adev->vcn.inst->gpu_addr + offset));
	WREG32_SOC15(UVD, 0, mmUVD_LMI_VCPU_CACHE1_64BIT_BAR_HIGH,
		upper_32_bits(adev->vcn.inst->gpu_addr + offset));
	WREG32_SOC15(UVD, 0, mmUVD_VCPU_CACHE_OFFSET1, 0);
	WREG32_SOC15(UVD, 0, mmUVD_VCPU_CACHE_SIZE1, AMDGPU_VCN_STACK_SIZE);

	/* cache window 2: context */
	WREG32_SOC15(UVD, 0, mmUVD_LMI_VCPU_CACHE2_64BIT_BAR_LOW,
		lower_32_bits(adev->vcn.inst->gpu_addr + offset + AMDGPU_VCN_STACK_SIZE));
	WREG32_SOC15(UVD, 0, mmUVD_LMI_VCPU_CACHE2_64BIT_BAR_HIGH,
		upper_32_bits(adev->vcn.inst->gpu_addr + offset + AMDGPU_VCN_STACK_SIZE));
	WREG32_SOC15(UVD, 0, mmUVD_VCPU_CACHE_OFFSET2, 0);
	WREG32_SOC15(UVD, 0, mmUVD_VCPU_CACHE_SIZE2, AMDGPU_VCN_CONTEXT_SIZE);

	WREG32_SOC15(UVD, 0, mmUVD_GFX10_ADDR_CONFIG, adev->gfx.config.gb_addr_config);
}

static void vcn_v2_0_mc_resume_dpg_mode(struct amdgpu_device *adev, bool indirect)
{
	uint32_t size = AMDGPU_GPU_PAGE_ALIGN(adev->vcn.fw->size + 4);
	uint32_t offset;

	/* cache window 0: fw */
	if (adev->firmware.load_type == AMDGPU_FW_LOAD_PSP) {
		if (!indirect) {
			WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
				UVD, 0, mmUVD_LMI_VCPU_CACHE_64BIT_BAR_LOW),
				(adev->firmware.ucode[AMDGPU_UCODE_ID_VCN].tmr_mc_addr_lo), 0, indirect);
			WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
				UVD, 0, mmUVD_LMI_VCPU_CACHE_64BIT_BAR_HIGH),
				(adev->firmware.ucode[AMDGPU_UCODE_ID_VCN].tmr_mc_addr_hi), 0, indirect);
			WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
				UVD, 0, mmUVD_VCPU_CACHE_OFFSET0), 0, 0, indirect);
		} else {
			WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
				UVD, 0, mmUVD_LMI_VCPU_CACHE_64BIT_BAR_LOW), 0, 0, indirect);
			WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
				UVD, 0, mmUVD_LMI_VCPU_CACHE_64BIT_BAR_HIGH), 0, 0, indirect);
			WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
				UVD, 0, mmUVD_VCPU_CACHE_OFFSET0), 0, 0, indirect);
		}
		offset = 0;
	} else {
		WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
			UVD, 0, mmUVD_LMI_VCPU_CACHE_64BIT_BAR_LOW),
			lower_32_bits(adev->vcn.inst->gpu_addr), 0, indirect);
		WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
			UVD, 0, mmUVD_LMI_VCPU_CACHE_64BIT_BAR_HIGH),
			upper_32_bits(adev->vcn.inst->gpu_addr), 0, indirect);
		offset = size;
		WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
			UVD, 0, mmUVD_VCPU_CACHE_OFFSET0),
			AMDGPU_UVD_FIRMWARE_OFFSET >> 3, 0, indirect);
	}

	if (!indirect)
		WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
			UVD, 0, mmUVD_VCPU_CACHE_SIZE0), size, 0, indirect);
	else
		WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
			UVD, 0, mmUVD_VCPU_CACHE_SIZE0), 0, 0, indirect);

	/* cache window 1: stack */
	if (!indirect) {
		WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
			UVD, 0, mmUVD_LMI_VCPU_CACHE1_64BIT_BAR_LOW),
			lower_32_bits(adev->vcn.inst->gpu_addr + offset), 0, indirect);
		WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
			UVD, 0, mmUVD_LMI_VCPU_CACHE1_64BIT_BAR_HIGH),
			upper_32_bits(adev->vcn.inst->gpu_addr + offset), 0, indirect);
		WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
			UVD, 0, mmUVD_VCPU_CACHE_OFFSET1), 0, 0, indirect);
	} else {
		WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
			UVD, 0, mmUVD_LMI_VCPU_CACHE1_64BIT_BAR_LOW), 0, 0, indirect);
		WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
			UVD, 0, mmUVD_LMI_VCPU_CACHE1_64BIT_BAR_HIGH), 0, 0, indirect);
		WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
			UVD, 0, mmUVD_VCPU_CACHE_OFFSET1), 0, 0, indirect);
	}
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_VCPU_CACHE_SIZE1), AMDGPU_VCN_STACK_SIZE, 0, indirect);

	/* cache window 2: context */
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_LMI_VCPU_CACHE2_64BIT_BAR_LOW),
		lower_32_bits(adev->vcn.inst->gpu_addr + offset + AMDGPU_VCN_STACK_SIZE), 0, indirect);
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_LMI_VCPU_CACHE2_64BIT_BAR_HIGH),
		upper_32_bits(adev->vcn.inst->gpu_addr + offset + AMDGPU_VCN_STACK_SIZE), 0, indirect);
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_VCPU_CACHE_OFFSET2), 0, 0, indirect);
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_VCPU_CACHE_SIZE2), AMDGPU_VCN_CONTEXT_SIZE, 0, indirect);

	/* non-cache window */
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_LMI_VCPU_NC0_64BIT_BAR_LOW), 0, 0, indirect);
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_LMI_VCPU_NC0_64BIT_BAR_HIGH), 0, 0, indirect);
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_VCPU_NONCACHE_OFFSET0), 0, 0, indirect);
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_VCPU_NONCACHE_SIZE0), 0, 0, indirect);

	/* VCN global tiling registers */
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_GFX10_ADDR_CONFIG), adev->gfx.config.gb_addr_config, 0, indirect);
}

/**
 * vcn_v2_0_disable_clock_gating - disable VCN clock gating
 *
 * @adev: amdgpu_device pointer
 * @sw: enable SW clock gating
 *
 * Disable clock gating for VCN block
 */
static void vcn_v2_0_disable_clock_gating(struct amdgpu_device *adev)
{
	uint32_t data;

	/* UVD disable CGC */
	data = RREG32_SOC15(VCN, 0, mmUVD_CGC_CTRL);
	if (adev->cg_flags & AMD_CG_SUPPORT_VCN_MGCG)
		data |= 1 << UVD_CGC_CTRL__DYN_CLOCK_MODE__SHIFT;
	else
		data &= ~UVD_CGC_CTRL__DYN_CLOCK_MODE_MASK;
	data |= 1 << UVD_CGC_CTRL__CLK_GATE_DLY_TIMER__SHIFT;
	data |= 4 << UVD_CGC_CTRL__CLK_OFF_DELAY__SHIFT;
	WREG32_SOC15(VCN, 0, mmUVD_CGC_CTRL, data);

	data = RREG32_SOC15(VCN, 0, mmUVD_CGC_GATE);
	data &= ~(UVD_CGC_GATE__SYS_MASK
		| UVD_CGC_GATE__UDEC_MASK
		| UVD_CGC_GATE__MPEG2_MASK
		| UVD_CGC_GATE__REGS_MASK
		| UVD_CGC_GATE__RBC_MASK
		| UVD_CGC_GATE__LMI_MC_MASK
		| UVD_CGC_GATE__LMI_UMC_MASK
		| UVD_CGC_GATE__IDCT_MASK
		| UVD_CGC_GATE__MPRD_MASK
		| UVD_CGC_GATE__MPC_MASK
		| UVD_CGC_GATE__LBSI_MASK
		| UVD_CGC_GATE__LRBBM_MASK
		| UVD_CGC_GATE__UDEC_RE_MASK
		| UVD_CGC_GATE__UDEC_CM_MASK
		| UVD_CGC_GATE__UDEC_IT_MASK
		| UVD_CGC_GATE__UDEC_DB_MASK
		| UVD_CGC_GATE__UDEC_MP_MASK
		| UVD_CGC_GATE__WCB_MASK
		| UVD_CGC_GATE__VCPU_MASK
		| UVD_CGC_GATE__SCPU_MASK);
	WREG32_SOC15(VCN, 0, mmUVD_CGC_GATE, data);

	data = RREG32_SOC15(VCN, 0, mmUVD_CGC_CTRL);
	data &= ~(UVD_CGC_CTRL__UDEC_RE_MODE_MASK
		| UVD_CGC_CTRL__UDEC_CM_MODE_MASK
		| UVD_CGC_CTRL__UDEC_IT_MODE_MASK
		| UVD_CGC_CTRL__UDEC_DB_MODE_MASK
		| UVD_CGC_CTRL__UDEC_MP_MODE_MASK
		| UVD_CGC_CTRL__SYS_MODE_MASK
		| UVD_CGC_CTRL__UDEC_MODE_MASK
		| UVD_CGC_CTRL__MPEG2_MODE_MASK
		| UVD_CGC_CTRL__REGS_MODE_MASK
		| UVD_CGC_CTRL__RBC_MODE_MASK
		| UVD_CGC_CTRL__LMI_MC_MODE_MASK
		| UVD_CGC_CTRL__LMI_UMC_MODE_MASK
		| UVD_CGC_CTRL__IDCT_MODE_MASK
		| UVD_CGC_CTRL__MPRD_MODE_MASK
		| UVD_CGC_CTRL__MPC_MODE_MASK
		| UVD_CGC_CTRL__LBSI_MODE_MASK
		| UVD_CGC_CTRL__LRBBM_MODE_MASK
		| UVD_CGC_CTRL__WCB_MODE_MASK
		| UVD_CGC_CTRL__VCPU_MODE_MASK
		| UVD_CGC_CTRL__SCPU_MODE_MASK);
	WREG32_SOC15(VCN, 0, mmUVD_CGC_CTRL, data);

	/* turn on */
	data = RREG32_SOC15(VCN, 0, mmUVD_SUVD_CGC_GATE);
	data |= (UVD_SUVD_CGC_GATE__SRE_MASK
		| UVD_SUVD_CGC_GATE__SIT_MASK
		| UVD_SUVD_CGC_GATE__SMP_MASK
		| UVD_SUVD_CGC_GATE__SCM_MASK
		| UVD_SUVD_CGC_GATE__SDB_MASK
		| UVD_SUVD_CGC_GATE__SRE_H264_MASK
		| UVD_SUVD_CGC_GATE__SRE_HEVC_MASK
		| UVD_SUVD_CGC_GATE__SIT_H264_MASK
		| UVD_SUVD_CGC_GATE__SIT_HEVC_MASK
		| UVD_SUVD_CGC_GATE__SCM_H264_MASK
		| UVD_SUVD_CGC_GATE__SCM_HEVC_MASK
		| UVD_SUVD_CGC_GATE__SDB_H264_MASK
		| UVD_SUVD_CGC_GATE__SDB_HEVC_MASK
		| UVD_SUVD_CGC_GATE__SCLR_MASK
		| UVD_SUVD_CGC_GATE__UVD_SC_MASK
		| UVD_SUVD_CGC_GATE__ENT_MASK
		| UVD_SUVD_CGC_GATE__SIT_HEVC_DEC_MASK
		| UVD_SUVD_CGC_GATE__SIT_HEVC_ENC_MASK
		| UVD_SUVD_CGC_GATE__SITE_MASK
		| UVD_SUVD_CGC_GATE__SRE_VP9_MASK
		| UVD_SUVD_CGC_GATE__SCM_VP9_MASK
		| UVD_SUVD_CGC_GATE__SIT_VP9_DEC_MASK
		| UVD_SUVD_CGC_GATE__SDB_VP9_MASK
		| UVD_SUVD_CGC_GATE__IME_HEVC_MASK);
	WREG32_SOC15(VCN, 0, mmUVD_SUVD_CGC_GATE, data);

	data = RREG32_SOC15(VCN, 0, mmUVD_SUVD_CGC_CTRL);
	data &= ~(UVD_SUVD_CGC_CTRL__SRE_MODE_MASK
		| UVD_SUVD_CGC_CTRL__SIT_MODE_MASK
		| UVD_SUVD_CGC_CTRL__SMP_MODE_MASK
		| UVD_SUVD_CGC_CTRL__SCM_MODE_MASK
		| UVD_SUVD_CGC_CTRL__SDB_MODE_MASK
		| UVD_SUVD_CGC_CTRL__SCLR_MODE_MASK
		| UVD_SUVD_CGC_CTRL__UVD_SC_MODE_MASK
		| UVD_SUVD_CGC_CTRL__ENT_MODE_MASK
		| UVD_SUVD_CGC_CTRL__IME_MODE_MASK
		| UVD_SUVD_CGC_CTRL__SITE_MODE_MASK);
	WREG32_SOC15(VCN, 0, mmUVD_SUVD_CGC_CTRL, data);
}

static void vcn_v2_0_clock_gating_dpg_mode(struct amdgpu_device *adev,
		uint8_t sram_sel, uint8_t indirect)
{
	uint32_t reg_data = 0;

	/* enable sw clock gating control */
	if (adev->cg_flags & AMD_CG_SUPPORT_VCN_MGCG)
		reg_data = 1 << UVD_CGC_CTRL__DYN_CLOCK_MODE__SHIFT;
	else
		reg_data = 0 << UVD_CGC_CTRL__DYN_CLOCK_MODE__SHIFT;
	reg_data |= 1 << UVD_CGC_CTRL__CLK_GATE_DLY_TIMER__SHIFT;
	reg_data |= 4 << UVD_CGC_CTRL__CLK_OFF_DELAY__SHIFT;
	reg_data &= ~(UVD_CGC_CTRL__UDEC_RE_MODE_MASK |
		 UVD_CGC_CTRL__UDEC_CM_MODE_MASK |
		 UVD_CGC_CTRL__UDEC_IT_MODE_MASK |
		 UVD_CGC_CTRL__UDEC_DB_MODE_MASK |
		 UVD_CGC_CTRL__UDEC_MP_MODE_MASK |
		 UVD_CGC_CTRL__SYS_MODE_MASK |
		 UVD_CGC_CTRL__UDEC_MODE_MASK |
		 UVD_CGC_CTRL__MPEG2_MODE_MASK |
		 UVD_CGC_CTRL__REGS_MODE_MASK |
		 UVD_CGC_CTRL__RBC_MODE_MASK |
		 UVD_CGC_CTRL__LMI_MC_MODE_MASK |
		 UVD_CGC_CTRL__LMI_UMC_MODE_MASK |
		 UVD_CGC_CTRL__IDCT_MODE_MASK |
		 UVD_CGC_CTRL__MPRD_MODE_MASK |
		 UVD_CGC_CTRL__MPC_MODE_MASK |
		 UVD_CGC_CTRL__LBSI_MODE_MASK |
		 UVD_CGC_CTRL__LRBBM_MODE_MASK |
		 UVD_CGC_CTRL__WCB_MODE_MASK |
		 UVD_CGC_CTRL__VCPU_MODE_MASK |
		 UVD_CGC_CTRL__SCPU_MODE_MASK);
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_CGC_CTRL), reg_data, sram_sel, indirect);

	/* turn off clock gating */
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_CGC_GATE), 0, sram_sel, indirect);

	/* turn on SUVD clock gating */
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_SUVD_CGC_GATE), 1, sram_sel, indirect);

	/* turn on sw mode in UVD_SUVD_CGC_CTRL */
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_SUVD_CGC_CTRL), 0, sram_sel, indirect);
}

/**
 * vcn_v2_0_enable_clock_gating - enable VCN clock gating
 *
 * @adev: amdgpu_device pointer
 * @sw: enable SW clock gating
 *
 * Enable clock gating for VCN block
 */
static void vcn_v2_0_enable_clock_gating(struct amdgpu_device *adev)
{
	uint32_t data = 0;

	/* enable UVD CGC */
	data = RREG32_SOC15(VCN, 0, mmUVD_CGC_CTRL);
	if (adev->cg_flags & AMD_CG_SUPPORT_VCN_MGCG)
		data |= 1 << UVD_CGC_CTRL__DYN_CLOCK_MODE__SHIFT;
	else
		data |= 0 << UVD_CGC_CTRL__DYN_CLOCK_MODE__SHIFT;
	data |= 1 << UVD_CGC_CTRL__CLK_GATE_DLY_TIMER__SHIFT;
	data |= 4 << UVD_CGC_CTRL__CLK_OFF_DELAY__SHIFT;
	WREG32_SOC15(VCN, 0, mmUVD_CGC_CTRL, data);

	data = RREG32_SOC15(VCN, 0, mmUVD_CGC_CTRL);
	data |= (UVD_CGC_CTRL__UDEC_RE_MODE_MASK
		| UVD_CGC_CTRL__UDEC_CM_MODE_MASK
		| UVD_CGC_CTRL__UDEC_IT_MODE_MASK
		| UVD_CGC_CTRL__UDEC_DB_MODE_MASK
		| UVD_CGC_CTRL__UDEC_MP_MODE_MASK
		| UVD_CGC_CTRL__SYS_MODE_MASK
		| UVD_CGC_CTRL__UDEC_MODE_MASK
		| UVD_CGC_CTRL__MPEG2_MODE_MASK
		| UVD_CGC_CTRL__REGS_MODE_MASK
		| UVD_CGC_CTRL__RBC_MODE_MASK
		| UVD_CGC_CTRL__LMI_MC_MODE_MASK
		| UVD_CGC_CTRL__LMI_UMC_MODE_MASK
		| UVD_CGC_CTRL__IDCT_MODE_MASK
		| UVD_CGC_CTRL__MPRD_MODE_MASK
		| UVD_CGC_CTRL__MPC_MODE_MASK
		| UVD_CGC_CTRL__LBSI_MODE_MASK
		| UVD_CGC_CTRL__LRBBM_MODE_MASK
		| UVD_CGC_CTRL__WCB_MODE_MASK
		| UVD_CGC_CTRL__VCPU_MODE_MASK
		| UVD_CGC_CTRL__SCPU_MODE_MASK);
	WREG32_SOC15(VCN, 0, mmUVD_CGC_CTRL, data);

	data = RREG32_SOC15(VCN, 0, mmUVD_SUVD_CGC_CTRL);
	data |= (UVD_SUVD_CGC_CTRL__SRE_MODE_MASK
		| UVD_SUVD_CGC_CTRL__SIT_MODE_MASK
		| UVD_SUVD_CGC_CTRL__SMP_MODE_MASK
		| UVD_SUVD_CGC_CTRL__SCM_MODE_MASK
		| UVD_SUVD_CGC_CTRL__SDB_MODE_MASK
		| UVD_SUVD_CGC_CTRL__SCLR_MODE_MASK
		| UVD_SUVD_CGC_CTRL__UVD_SC_MODE_MASK
		| UVD_SUVD_CGC_CTRL__ENT_MODE_MASK
		| UVD_SUVD_CGC_CTRL__IME_MODE_MASK
		| UVD_SUVD_CGC_CTRL__SITE_MODE_MASK);
	WREG32_SOC15(VCN, 0, mmUVD_SUVD_CGC_CTRL, data);
}

static void vcn_v2_0_disable_static_power_gating(struct amdgpu_device *adev)
{
	uint32_t data = 0;
	int ret;

	if (adev->pg_flags & AMD_PG_SUPPORT_VCN) {
		data = (1 << UVD_PGFSM_CONFIG__UVDM_PWR_CONFIG__SHIFT
			| 1 << UVD_PGFSM_CONFIG__UVDU_PWR_CONFIG__SHIFT
			| 2 << UVD_PGFSM_CONFIG__UVDF_PWR_CONFIG__SHIFT
			| 2 << UVD_PGFSM_CONFIG__UVDC_PWR_CONFIG__SHIFT
			| 2 << UVD_PGFSM_CONFIG__UVDB_PWR_CONFIG__SHIFT
			| 2 << UVD_PGFSM_CONFIG__UVDIL_PWR_CONFIG__SHIFT
			| 2 << UVD_PGFSM_CONFIG__UVDIR_PWR_CONFIG__SHIFT
			| 2 << UVD_PGFSM_CONFIG__UVDTD_PWR_CONFIG__SHIFT
			| 2 << UVD_PGFSM_CONFIG__UVDTE_PWR_CONFIG__SHIFT
			| 2 << UVD_PGFSM_CONFIG__UVDE_PWR_CONFIG__SHIFT);

		WREG32_SOC15(VCN, 0, mmUVD_PGFSM_CONFIG, data);
		SOC15_WAIT_ON_RREG(VCN, 0, mmUVD_PGFSM_STATUS,
			UVD_PGFSM_STATUS__UVDM_UVDU_PWR_ON_2_0, 0xFFFFF, ret);
	} else {
		data = (1 << UVD_PGFSM_CONFIG__UVDM_PWR_CONFIG__SHIFT
			| 1 << UVD_PGFSM_CONFIG__UVDU_PWR_CONFIG__SHIFT
			| 1 << UVD_PGFSM_CONFIG__UVDF_PWR_CONFIG__SHIFT
			| 1 << UVD_PGFSM_CONFIG__UVDC_PWR_CONFIG__SHIFT
			| 1 << UVD_PGFSM_CONFIG__UVDB_PWR_CONFIG__SHIFT
			| 1 << UVD_PGFSM_CONFIG__UVDIL_PWR_CONFIG__SHIFT
			| 1 << UVD_PGFSM_CONFIG__UVDIR_PWR_CONFIG__SHIFT
			| 1 << UVD_PGFSM_CONFIG__UVDTD_PWR_CONFIG__SHIFT
			| 1 << UVD_PGFSM_CONFIG__UVDTE_PWR_CONFIG__SHIFT
			| 1 << UVD_PGFSM_CONFIG__UVDE_PWR_CONFIG__SHIFT);
		WREG32_SOC15(VCN, 0, mmUVD_PGFSM_CONFIG, data);
		SOC15_WAIT_ON_RREG(VCN, 0, mmUVD_PGFSM_STATUS, 0,  0xFFFFF, ret);
	}

	/* polling UVD_PGFSM_STATUS to confirm UVDM_PWR_STATUS,
	 * UVDU_PWR_STATUS are 0 (power on) */

	data = RREG32_SOC15(VCN, 0, mmUVD_POWER_STATUS);
	data &= ~0x103;
	if (adev->pg_flags & AMD_PG_SUPPORT_VCN)
		data |= UVD_PGFSM_CONFIG__UVDM_UVDU_PWR_ON |
			UVD_POWER_STATUS__UVD_PG_EN_MASK;

	WREG32_SOC15(VCN, 0, mmUVD_POWER_STATUS, data);
}

static void vcn_v2_0_enable_static_power_gating(struct amdgpu_device *adev)
{
	uint32_t data = 0;
	int ret;

	if (adev->pg_flags & AMD_PG_SUPPORT_VCN) {
		/* Before power off, this indicator has to be turned on */
		data = RREG32_SOC15(VCN, 0, mmUVD_POWER_STATUS);
		data &= ~UVD_POWER_STATUS__UVD_POWER_STATUS_MASK;
		data |= UVD_POWER_STATUS__UVD_POWER_STATUS_TILES_OFF;
		WREG32_SOC15(VCN, 0, mmUVD_POWER_STATUS, data);


		data = (2 << UVD_PGFSM_CONFIG__UVDM_PWR_CONFIG__SHIFT
			| 2 << UVD_PGFSM_CONFIG__UVDU_PWR_CONFIG__SHIFT
			| 2 << UVD_PGFSM_CONFIG__UVDF_PWR_CONFIG__SHIFT
			| 2 << UVD_PGFSM_CONFIG__UVDC_PWR_CONFIG__SHIFT
			| 2 << UVD_PGFSM_CONFIG__UVDB_PWR_CONFIG__SHIFT
			| 2 << UVD_PGFSM_CONFIG__UVDIL_PWR_CONFIG__SHIFT
			| 2 << UVD_PGFSM_CONFIG__UVDIR_PWR_CONFIG__SHIFT
			| 2 << UVD_PGFSM_CONFIG__UVDTD_PWR_CONFIG__SHIFT
			| 2 << UVD_PGFSM_CONFIG__UVDTE_PWR_CONFIG__SHIFT
			| 2 << UVD_PGFSM_CONFIG__UVDE_PWR_CONFIG__SHIFT);

		WREG32_SOC15(VCN, 0, mmUVD_PGFSM_CONFIG, data);

		data = (2 << UVD_PGFSM_STATUS__UVDM_PWR_STATUS__SHIFT
			| 2 << UVD_PGFSM_STATUS__UVDU_PWR_STATUS__SHIFT
			| 2 << UVD_PGFSM_STATUS__UVDF_PWR_STATUS__SHIFT
			| 2 << UVD_PGFSM_STATUS__UVDC_PWR_STATUS__SHIFT
			| 2 << UVD_PGFSM_STATUS__UVDB_PWR_STATUS__SHIFT
			| 2 << UVD_PGFSM_STATUS__UVDIL_PWR_STATUS__SHIFT
			| 2 << UVD_PGFSM_STATUS__UVDIR_PWR_STATUS__SHIFT
			| 2 << UVD_PGFSM_STATUS__UVDTD_PWR_STATUS__SHIFT
			| 2 << UVD_PGFSM_STATUS__UVDTE_PWR_STATUS__SHIFT
			| 2 << UVD_PGFSM_STATUS__UVDE_PWR_STATUS__SHIFT);
		SOC15_WAIT_ON_RREG(VCN, 0, mmUVD_PGFSM_STATUS, data, 0xFFFFF, ret);
	}
}

static int vcn_v2_0_start_dpg_mode(struct amdgpu_device *adev, bool indirect)
{
	struct amdgpu_ring *ring = &adev->vcn.inst->ring_dec;
	uint32_t rb_bufsz, tmp;

	vcn_v2_0_enable_static_power_gating(adev);

	/* enable dynamic power gating mode */
	tmp = RREG32_SOC15(UVD, 0, mmUVD_POWER_STATUS);
	tmp |= UVD_POWER_STATUS__UVD_PG_MODE_MASK;
	tmp |= UVD_POWER_STATUS__UVD_PG_EN_MASK;
	WREG32_SOC15(UVD, 0, mmUVD_POWER_STATUS, tmp);

	if (indirect)
		adev->vcn.inst->dpg_sram_curr_addr = (uint32_t*)adev->vcn.inst->dpg_sram_cpu_addr;

	/* enable clock gating */
	vcn_v2_0_clock_gating_dpg_mode(adev, 0, indirect);

	/* enable VCPU clock */
	tmp = (0xFF << UVD_VCPU_CNTL__PRB_TIMEOUT_VAL__SHIFT);
	tmp |= UVD_VCPU_CNTL__CLK_EN_MASK;
	tmp |= UVD_VCPU_CNTL__MIF_WR_LOW_THRESHOLD_BP_MASK;
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_VCPU_CNTL), tmp, 0, indirect);

	/* disable master interupt */
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_MASTINT_EN), 0, 0, indirect);

	/* setup mmUVD_LMI_CTRL */
	tmp = (UVD_LMI_CTRL__WRITE_CLEAN_TIMER_EN_MASK |
		UVD_LMI_CTRL__REQ_MODE_MASK |
		UVD_LMI_CTRL__CRC_RESET_MASK |
		UVD_LMI_CTRL__MASK_MC_URGENT_MASK |
		UVD_LMI_CTRL__DATA_COHERENCY_EN_MASK |
		UVD_LMI_CTRL__VCPU_DATA_COHERENCY_EN_MASK |
		(8 << UVD_LMI_CTRL__WRITE_CLEAN_TIMER__SHIFT) |
		0x00100000L);
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_LMI_CTRL), tmp, 0, indirect);

	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_MPC_CNTL),
		0x2 << UVD_MPC_CNTL__REPLACEMENT_MODE__SHIFT, 0, indirect);

	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_MPC_SET_MUXA0),
		((0x1 << UVD_MPC_SET_MUXA0__VARA_1__SHIFT) |
		 (0x2 << UVD_MPC_SET_MUXA0__VARA_2__SHIFT) |
		 (0x3 << UVD_MPC_SET_MUXA0__VARA_3__SHIFT) |
		 (0x4 << UVD_MPC_SET_MUXA0__VARA_4__SHIFT)), 0, indirect);

	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_MPC_SET_MUXB0),
		((0x1 << UVD_MPC_SET_MUXB0__VARB_1__SHIFT) |
		 (0x2 << UVD_MPC_SET_MUXB0__VARB_2__SHIFT) |
		 (0x3 << UVD_MPC_SET_MUXB0__VARB_3__SHIFT) |
		 (0x4 << UVD_MPC_SET_MUXB0__VARB_4__SHIFT)), 0, indirect);

	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_MPC_SET_MUX),
		((0x0 << UVD_MPC_SET_MUX__SET_0__SHIFT) |
		 (0x1 << UVD_MPC_SET_MUX__SET_1__SHIFT) |
		 (0x2 << UVD_MPC_SET_MUX__SET_2__SHIFT)), 0, indirect);

	vcn_v2_0_mc_resume_dpg_mode(adev, indirect);

	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_REG_XX_MASK), 0x10, 0, indirect);
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_RBC_XX_IB_REG_CHECK), 0x3, 0, indirect);

	/* release VCPU reset to boot */
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_SOFT_RESET), 0, 0, indirect);

	/* enable LMI MC and UMC channels */
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_LMI_CTRL2),
		0x1F << UVD_LMI_CTRL2__RE_OFLD_MIF_WR_REQ_NUM__SHIFT, 0, indirect);

	/* enable master interrupt */
	WREG32_SOC15_DPG_MODE_2_0(0, SOC15_DPG_MODE_OFFSET_2_0(
		UVD, 0, mmUVD_MASTINT_EN),
		UVD_MASTINT_EN__VCPU_EN_MASK, 0, indirect);

	if (indirect)
		psp_update_vcn_sram(adev, 0, adev->vcn.inst->dpg_sram_gpu_addr,
				    (uint32_t)((uintptr_t)adev->vcn.inst->dpg_sram_curr_addr -
					       (uintptr_t)adev->vcn.inst->dpg_sram_cpu_addr));

	/* force RBC into idle state */
	rb_bufsz = order_base_2(ring->ring_size);
	tmp = REG_SET_FIELD(0, UVD_RBC_RB_CNTL, RB_BUFSZ, rb_bufsz);
	tmp = REG_SET_FIELD(tmp, UVD_RBC_RB_CNTL, RB_BLKSZ, 1);
	tmp = REG_SET_FIELD(tmp, UVD_RBC_RB_CNTL, RB_NO_FETCH, 1);
	tmp = REG_SET_FIELD(tmp, UVD_RBC_RB_CNTL, RB_NO_UPDATE, 1);
	tmp = REG_SET_FIELD(tmp, UVD_RBC_RB_CNTL, RB_RPTR_WR_EN, 1);
	WREG32_SOC15(UVD, 0, mmUVD_RBC_RB_CNTL, tmp);

	/* set the write pointer delay */
	WREG32_SOC15(UVD, 0, mmUVD_RBC_RB_WPTR_CNTL, 0);

	/* set the wb address */
	WREG32_SOC15(UVD, 0, mmUVD_RBC_RB_RPTR_ADDR,
		(upper_32_bits(ring->gpu_addr) >> 2));

	/* programm the RB_BASE for ring buffer */
	WREG32_SOC15(UVD, 0, mmUVD_LMI_RBC_RB_64BIT_BAR_LOW,
		lower_32_bits(ring->gpu_addr));
	WREG32_SOC15(UVD, 0, mmUVD_LMI_RBC_RB_64BIT_BAR_HIGH,
		upper_32_bits(ring->gpu_addr));

	/* Initialize the ring buffer's read and write pointers */
	WREG32_SOC15(UVD, 0, mmUVD_RBC_RB_RPTR, 0);

	WREG32_SOC15(UVD, 0, mmUVD_SCRATCH2, 0);

	ring->wptr = RREG32_SOC15(UVD, 0, mmUVD_RBC_RB_RPTR);
	WREG32_SOC15(UVD, 0, mmUVD_RBC_RB_WPTR,
		lower_32_bits(ring->wptr));

	return 0;
}

static int vcn_v2_0_start(struct amdgpu_device *adev)
{
	struct amdgpu_ring *ring = &adev->vcn.inst->ring_dec;
	uint32_t rb_bufsz, tmp;
	uint32_t lmi_swap_cntl;
	int i, j, r;

	if (adev->pm.dpm_enabled)
		amdgpu_dpm_enable_uvd(adev, true);

	if (adev->pg_flags & AMD_PG_SUPPORT_VCN_DPG)
		return vcn_v2_0_start_dpg_mode(adev, adev->vcn.indirect_sram);

	vcn_v2_0_disable_static_power_gating(adev);

	/* set uvd status busy */
	tmp = RREG32_SOC15(UVD, 0, mmUVD_STATUS) | UVD_STATUS__UVD_BUSY;
	WREG32_SOC15(UVD, 0, mmUVD_STATUS, tmp);

	/*SW clock gating */
	vcn_v2_0_disable_clock_gating(adev);

	/* enable VCPU clock */
	WREG32_P(SOC15_REG_OFFSET(UVD, 0, mmUVD_VCPU_CNTL),
		UVD_VCPU_CNTL__CLK_EN_MASK, ~UVD_VCPU_CNTL__CLK_EN_MASK);

	/* disable master interrupt */
	WREG32_P(SOC15_REG_OFFSET(UVD, 0, mmUVD_MASTINT_EN), 0,
		~UVD_MASTINT_EN__VCPU_EN_MASK);

	/* setup mmUVD_LMI_CTRL */
	tmp = RREG32_SOC15(UVD, 0, mmUVD_LMI_CTRL);
	WREG32_SOC15(UVD, 0, mmUVD_LMI_CTRL, tmp |
		UVD_LMI_CTRL__WRITE_CLEAN_TIMER_EN_MASK	|
		UVD_LMI_CTRL__MASK_MC_URGENT_MASK |
		UVD_LMI_CTRL__DATA_COHERENCY_EN_MASK |
		UVD_LMI_CTRL__VCPU_DATA_COHERENCY_EN_MASK);

	/* setup mmUVD_MPC_CNTL */
	tmp = RREG32_SOC15(UVD, 0, mmUVD_MPC_CNTL);
	tmp &= ~UVD_MPC_CNTL__REPLACEMENT_MODE_MASK;
	tmp |= 0x2 << UVD_MPC_CNTL__REPLACEMENT_MODE__SHIFT;
	WREG32_SOC15(VCN, 0, mmUVD_MPC_CNTL, tmp);

	/* setup UVD_MPC_SET_MUXA0 */
	WREG32_SOC15(UVD, 0, mmUVD_MPC_SET_MUXA0,
		((0x1 << UVD_MPC_SET_MUXA0__VARA_1__SHIFT) |
		(0x2 << UVD_MPC_SET_MUXA0__VARA_2__SHIFT) |
		(0x3 << UVD_MPC_SET_MUXA0__VARA_3__SHIFT) |
		(0x4 << UVD_MPC_SET_MUXA0__VARA_4__SHIFT)));

	/* setup UVD_MPC_SET_MUXB0 */
	WREG32_SOC15(UVD, 0, mmUVD_MPC_SET_MUXB0,
		((0x1 << UVD_MPC_SET_MUXB0__VARB_1__SHIFT) |
		(0x2 << UVD_MPC_SET_MUXB0__VARB_2__SHIFT) |
		(0x3 << UVD_MPC_SET_MUXB0__VARB_3__SHIFT) |
		(0x4 << UVD_MPC_SET_MUXB0__VARB_4__SHIFT)));

	/* setup mmUVD_MPC_SET_MUX */
	WREG32_SOC15(UVD, 0, mmUVD_MPC_SET_MUX,
		((0x0 << UVD_MPC_SET_MUX__SET_0__SHIFT) |
		(0x1 << UVD_MPC_SET_MUX__SET_1__SHIFT) |
		(0x2 << UVD_MPC_SET_MUX__SET_2__SHIFT)));

	vcn_v2_0_mc_resume(adev);

	/* release VCPU reset to boot */
	WREG32_P(SOC15_REG_OFFSET(UVD, 0, mmUVD_SOFT_RESET), 0,
		~UVD_SOFT_RESET__VCPU_SOFT_RESET_MASK);

	/* enable LMI MC and UMC channels */
	WREG32_P(SOC15_REG_OFFSET(UVD, 0, mmUVD_LMI_CTRL2), 0,
		~UVD_LMI_CTRL2__STALL_ARB_UMC_MASK);

	tmp = RREG32_SOC15(VCN, 0, mmUVD_SOFT_RESET);
	tmp &= ~UVD_SOFT_RESET__LMI_SOFT_RESET_MASK;
	tmp &= ~UVD_SOFT_RESET__LMI_UMC_SOFT_RESET_MASK;
	WREG32_SOC15(VCN, 0, mmUVD_SOFT_RESET, tmp);

	/* disable byte swapping */
	lmi_swap_cntl = 0;
#ifdef __BIG_ENDIAN
	/* swap (8 in 32) RB and IB */
	lmi_swap_cntl = 0xa;
#endif
	WREG32_SOC15(UVD, 0, mmUVD_LMI_SWAP_CNTL, lmi_swap_cntl);

	for (i = 0; i < 10; ++i) {
		uint32_t status;

		for (j = 0; j < 100; ++j) {
			status = RREG32_SOC15(UVD, 0, mmUVD_STATUS);
			if (status & 2)
				break;
			mdelay(10);
		}
		r = 0;
		if (status & 2)
			break;

		DRM_ERROR("VCN decode not responding, trying to reset the VCPU!!!\n");
		WREG32_P(SOC15_REG_OFFSET(UVD, 0, mmUVD_SOFT_RESET),
			UVD_SOFT_RESET__VCPU_SOFT_RESET_MASK,
			~UVD_SOFT_RESET__VCPU_SOFT_RESET_MASK);
		mdelay(10);
		WREG32_P(SOC15_REG_OFFSET(UVD, 0, mmUVD_SOFT_RESET), 0,
			~UVD_SOFT_RESET__VCPU_SOFT_RESET_MASK);
		mdelay(10);
		r = -1;
	}

	if (r) {
		DRM_ERROR("VCN decode not responding, giving up!!!\n");
		return r;
	}

	/* enable master interrupt */
	WREG32_P(SOC15_REG_OFFSET(UVD, 0, mmUVD_MASTINT_EN),
		UVD_MASTINT_EN__VCPU_EN_MASK,
		~UVD_MASTINT_EN__VCPU_EN_MASK);

	/* clear the busy bit of VCN_STATUS */
	WREG32_P(SOC15_REG_OFFSET(UVD, 0, mmUVD_STATUS), 0,
		~(2 << UVD_STATUS__VCPU_REPORT__SHIFT));

	WREG32_SOC15(UVD, 0, mmUVD_LMI_RBC_RB_VMID, 0);

	/* force RBC into idle state */
	rb_bufsz = order_base_2(ring->ring_size);
	tmp = REG_SET_FIELD(0, UVD_RBC_RB_CNTL, RB_BUFSZ, rb_bufsz);
	tmp = REG_SET_FIELD(tmp, UVD_RBC_RB_CNTL, RB_BLKSZ, 1);
	tmp = REG_SET_FIELD(tmp, UVD_RBC_RB_CNTL, RB_NO_FETCH, 1);
	tmp = REG_SET_FIELD(tmp, UVD_RBC_RB_CNTL, RB_NO_UPDATE, 1);
	tmp = REG_SET_FIELD(tmp, UVD_RBC_RB_CNTL, RB_RPTR_WR_EN, 1);
	WREG32_SOC15(UVD, 0, mmUVD_RBC_RB_CNTL, tmp);

	/* programm the RB_BASE for ring buffer */
	WREG32_SOC15(UVD, 0, mmUVD_LMI_RBC_RB_64BIT_BAR_LOW,
		lower_32_bits(ring->gpu_addr));
	WREG32_SOC15(UVD, 0, mmUVD_LMI_RBC_RB_64BIT_BAR_HIGH,
		upper_32_bits(ring->gpu_addr));

	/* Initialize the ring buffer's read and write pointers */
	WREG32_SOC15(UVD, 0, mmUVD_RBC_RB_RPTR, 0);

	ring->wptr = RREG32_SOC15(UVD, 0, mmUVD_RBC_RB_RPTR);
	WREG32_SOC15(UVD, 0, mmUVD_RBC_RB_WPTR,
			lower_32_bits(ring->wptr));

	ring = &adev->vcn.inst->ring_enc[0];
	WREG32_SOC15(UVD, 0, mmUVD_RB_RPTR, lower_32_bits(ring->wptr));
	WREG32_SOC15(UVD, 0, mmUVD_RB_WPTR, lower_32_bits(ring->wptr));
	WREG32_SOC15(UVD, 0, mmUVD_RB_BASE_LO, ring->gpu_addr);
	WREG32_SOC15(UVD, 0, mmUVD_RB_BASE_HI, upper_32_bits(ring->gpu_addr));
	WREG32_SOC15(UVD, 0, mmUVD_RB_SIZE, ring->ring_size / 4);

	ring = &adev->vcn.inst->ring_enc[1];
	WREG32_SOC15(UVD, 0, mmUVD_RB_RPTR2, lower_32_bits(ring->wptr));
	WREG32_SOC15(UVD, 0, mmUVD_RB_WPTR2, lower_32_bits(ring->wptr));
	WREG32_SOC15(UVD, 0, mmUVD_RB_BASE_LO2, ring->gpu_addr);
	WREG32_SOC15(UVD, 0, mmUVD_RB_BASE_HI2, upper_32_bits(ring->gpu_addr));
	WREG32_SOC15(UVD, 0, mmUVD_RB_SIZE2, ring->ring_size / 4);

	return 0;
}

static int vcn_v2_0_stop_dpg_mode(struct amdgpu_device *adev)
{
	int ret_code = 0;
	uint32_t tmp;

	/* Wait for power status to be 1 */
	SOC15_WAIT_ON_RREG(UVD, 0, mmUVD_POWER_STATUS, 1,
		UVD_POWER_STATUS__UVD_POWER_STATUS_MASK, ret_code);

	/* wait for read ptr to be equal to write ptr */
	tmp = RREG32_SOC15(UVD, 0, mmUVD_RB_WPTR);
	SOC15_WAIT_ON_RREG(UVD, 0, mmUVD_RB_RPTR, tmp, 0xFFFFFFFF, ret_code);

	tmp = RREG32_SOC15(UVD, 0, mmUVD_RB_WPTR2);
	SOC15_WAIT_ON_RREG(UVD, 0, mmUVD_RB_RPTR2, tmp, 0xFFFFFFFF, ret_code);

	tmp = RREG32_SOC15(UVD, 0, mmUVD_RBC_RB_WPTR) & 0x7FFFFFFF;
	SOC15_WAIT_ON_RREG(UVD, 0, mmUVD_RBC_RB_RPTR, tmp, 0xFFFFFFFF, ret_code);

	SOC15_WAIT_ON_RREG(UVD, 0, mmUVD_POWER_STATUS, 1,
		UVD_POWER_STATUS__UVD_POWER_STATUS_MASK, ret_code);

	/* disable dynamic power gating mode */
	WREG32_P(SOC15_REG_OFFSET(UVD, 0, mmUVD_POWER_STATUS), 0,
			~UVD_POWER_STATUS__UVD_PG_MODE_MASK);

	return 0;
}

static int vcn_v2_0_stop(struct amdgpu_device *adev)
{
	uint32_t tmp;
	int r;

	if (adev->pg_flags & AMD_PG_SUPPORT_VCN_DPG) {
		r = vcn_v2_0_stop_dpg_mode(adev);
		if (r)
			return r;
		goto power_off;
	}

	/* wait for uvd idle */
	SOC15_WAIT_ON_RREG(VCN, 0, mmUVD_STATUS, UVD_STATUS__IDLE, 0x7, r);
	if (r)
		return r;

	tmp = UVD_LMI_STATUS__VCPU_LMI_WRITE_CLEAN_MASK |
		UVD_LMI_STATUS__READ_CLEAN_MASK |
		UVD_LMI_STATUS__WRITE_CLEAN_MASK |
		UVD_LMI_STATUS__WRITE_CLEAN_RAW_MASK;
	SOC15_WAIT_ON_RREG(VCN, 0, mmUVD_LMI_STATUS, tmp, tmp, r);
	if (r)
		return r;

	/* stall UMC channel */
	tmp = RREG32_SOC15(VCN, 0, mmUVD_LMI_CTRL2);
	tmp |= UVD_LMI_CTRL2__STALL_ARB_UMC_MASK;
	WREG32_SOC15(VCN, 0, mmUVD_LMI_CTRL2, tmp);

	tmp = UVD_LMI_STATUS__UMC_READ_CLEAN_RAW_MASK|
		UVD_LMI_STATUS__UMC_WRITE_CLEAN_RAW_MASK;
	SOC15_WAIT_ON_RREG(VCN, 0, mmUVD_LMI_STATUS, tmp, tmp, r);
	if (r)
		return r;

	/* disable VCPU clock */
	WREG32_P(SOC15_REG_OFFSET(UVD, 0, mmUVD_VCPU_CNTL), 0,
		~(UVD_VCPU_CNTL__CLK_EN_MASK));

	/* reset LMI UMC */
	WREG32_P(SOC15_REG_OFFSET(UVD, 0, mmUVD_SOFT_RESET),
		UVD_SOFT_RESET__LMI_UMC_SOFT_RESET_MASK,
		~UVD_SOFT_RESET__LMI_UMC_SOFT_RESET_MASK);

	/* reset LMI */
	WREG32_P(SOC15_REG_OFFSET(UVD, 0, mmUVD_SOFT_RESET),
		UVD_SOFT_RESET__LMI_SOFT_RESET_MASK,
		~UVD_SOFT_RESET__LMI_SOFT_RESET_MASK);

	/* reset VCPU */
	WREG32_P(SOC15_REG_OFFSET(UVD, 0, mmUVD_SOFT_RESET),
		UVD_SOFT_RESET__VCPU_SOFT_RESET_MASK,
		~UVD_SOFT_RESET__VCPU_SOFT_RESET_MASK);

	/* clear status */
	WREG32_SOC15(VCN, 0, mmUVD_STATUS, 0);

	vcn_v2_0_enable_clock_gating(adev);
	vcn_v2_0_enable_static_power_gating(adev);

power_off:
	if (adev->pm.dpm_enabled)
		amdgpu_dpm_enable_uvd(adev, false);

	return 0;
}

static int vcn_v2_0_pause_dpg_mode(struct amdgpu_device *adev,
				int inst_idx, struct dpg_pause_state *new_state)
{
	struct amdgpu_ring *ring;
	uint32_t reg_data = 0;
	int ret_code;

	/* pause/unpause if state is changed */
	if (adev->vcn.inst[inst_idx].pause_state.fw_based != new_state->fw_based) {
		DRM_DEBUG("dpg pause state changed %d -> %d",
			adev->vcn.inst[inst_idx].pause_state.fw_based,	new_state->fw_based);
		reg_data = RREG32_SOC15(UVD, 0, mmUVD_DPG_PAUSE) &
			(~UVD_DPG_PAUSE__NJ_PAUSE_DPG_ACK_MASK);

		if (new_state->fw_based == VCN_DPG_STATE__PAUSE) {
			ret_code = 0;
			SOC15_WAIT_ON_RREG(UVD, 0, mmUVD_POWER_STATUS, 0x1,
				UVD_POWER_STATUS__UVD_POWER_STATUS_MASK, ret_code);

			if (!ret_code) {
				/* pause DPG */
				reg_data |= UVD_DPG_PAUSE__NJ_PAUSE_DPG_REQ_MASK;
				WREG32_SOC15(UVD, 0, mmUVD_DPG_PAUSE, reg_data);

				/* wait for ACK */
				SOC15_WAIT_ON_RREG(UVD, 0, mmUVD_DPG_PAUSE,
					   UVD_DPG_PAUSE__NJ_PAUSE_DPG_ACK_MASK,
					   UVD_DPG_PAUSE__NJ_PAUSE_DPG_ACK_MASK, ret_code);

				/* Restore */
				ring = &adev->vcn.inst->ring_enc[0];
				WREG32_SOC15(UVD, 0, mmUVD_RB_BASE_LO, ring->gpu_addr);
				WREG32_SOC15(UVD, 0, mmUVD_RB_BASE_HI, upper_32_bits(ring->gpu_addr));
				WREG32_SOC15(UVD, 0, mmUVD_RB_SIZE, ring->ring_size / 4);
				WREG32_SOC15(UVD, 0, mmUVD_RB_RPTR, lower_32_bits(ring->wptr));
				WREG32_SOC15(UVD, 0, mmUVD_RB_WPTR, lower_32_bits(ring->wptr));

				ring = &adev->vcn.inst->ring_enc[1];
				WREG32_SOC15(UVD, 0, mmUVD_RB_BASE_LO2, ring->gpu_addr);
				WREG32_SOC15(UVD, 0, mmUVD_RB_BASE_HI2, upper_32_bits(ring->gpu_addr));
				WREG32_SOC15(UVD, 0, mmUVD_RB_SIZE2, ring->ring_size / 4);
				WREG32_SOC15(UVD, 0, mmUVD_RB_RPTR2, lower_32_bits(ring->wptr));
				WREG32_SOC15(UVD, 0, mmUVD_RB_WPTR2, lower_32_bits(ring->wptr));

				WREG32_SOC15(UVD, 0, mmUVD_RBC_RB_WPTR,
					   RREG32_SOC15(UVD, 0, mmUVD_SCRATCH2) & 0x7FFFFFFF);

				SOC15_WAIT_ON_RREG(UVD, 0, mmUVD_POWER_STATUS,
					   UVD_PGFSM_CONFIG__UVDM_UVDU_PWR_ON,
					   UVD_POWER_STATUS__UVD_POWER_STATUS_MASK, ret_code);
			}
		} else {
			/* unpause dpg, no need to wait */
			reg_data &= ~UVD_DPG_PAUSE__NJ_PAUSE_DPG_REQ_MASK;
			WREG32_SOC15(UVD, 0, mmUVD_DPG_PAUSE, reg_data);
		}
		adev->vcn.inst[inst_idx].pause_state.fw_based = new_state->fw_based;
	}

	return 0;
}

static bool vcn_v2_0_is_idle(void *handle)
{
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;

	return (RREG32_SOC15(VCN, 0, mmUVD_STATUS) == UVD_STATUS__IDLE);
}

static int vcn_v2_0_wait_for_idle(void *handle)
{
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
	int ret = 0;

	SOC15_WAIT_ON_RREG(VCN, 0, mmUVD_STATUS, UVD_STATUS__IDLE,
		UVD_STATUS__IDLE, ret);

	return ret;
}

static int vcn_v2_0_set_clockgating_state(void *handle,
					  enum amd_clockgating_state state)
{
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
	bool enable = (state == AMD_CG_STATE_GATE);

	if (enable) {
		/* wait for STATUS to clear */
		if (!vcn_v2_0_is_idle(handle))
			return -EBUSY;
		vcn_v2_0_enable_clock_gating(adev);
	} else {
		/* disable HW gating and enable Sw gating */
		vcn_v2_0_disable_clock_gating(adev);
	}
	return 0;
}

/**
 * vcn_v2_0_dec_ring_get_rptr - get read pointer
 *
 * @ring: amdgpu_ring pointer
 *
 * Returns the current hardware read pointer
 */
static uint64_t vcn_v2_0_dec_ring_get_rptr(struct amdgpu_ring *ring)
{
	struct amdgpu_device *adev = ring->adev;

	return RREG32_SOC15(UVD, 0, mmUVD_RBC_RB_RPTR);
}

/**
 * vcn_v2_0_dec_ring_get_wptr - get write pointer
 *
 * @ring: amdgpu_ring pointer
 *
 * Returns the current hardware write pointer
 */
static uint64_t vcn_v2_0_dec_ring_get_wptr(struct amdgpu_ring *ring)
{
	struct amdgpu_device *adev = ring->adev;

	if (ring->use_doorbell)
		return adev->wb.wb[ring->wptr_offs];
	else
		return RREG32_SOC15(UVD, 0, mmUVD_RBC_RB_WPTR);
}

/**
 * vcn_v2_0_dec_ring_set_wptr - set write pointer
 *
 * @ring: amdgpu_ring pointer
 *
 * Commits the write pointer to the hardware
 */
static void vcn_v2_0_dec_ring_set_wptr(struct amdgpu_ring *ring)
{
	struct amdgpu_device *adev = ring->adev;

	if (adev->pg_flags & AMD_PG_SUPPORT_VCN_DPG)
		WREG32_SOC15(UVD, 0, mmUVD_SCRATCH2,
			lower_32_bits(ring->wptr) | 0x80000000);

	if (ring->use_doorbell) {
		adev->wb.wb[ring->wptr_offs] = lower_32_bits(ring->wptr);
		WDOORBELL32(ring->doorbell_index, lower_32_bits(ring->wptr));
	} else {
		WREG32_SOC15(UVD, 0, mmUVD_RBC_RB_WPTR, lower_32_bits(ring->wptr));
	}
}

/**
 * vcn_v2_0_dec_ring_insert_start - insert a start command
 *
 * @ring: amdgpu_ring pointer
 *
 * Write a start command to the ring.
 */
void vcn_v2_0_dec_ring_insert_start(struct amdgpu_ring *ring)
{
	struct amdgpu_device *adev = ring->adev;

	amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.data0, 0));
	amdgpu_ring_write(ring, 0);
	amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.cmd, 0));
	amdgpu_ring_write(ring, VCN_DEC_KMD_CMD | (VCN_DEC_CMD_PACKET_START << 1));
}

/**
 * vcn_v2_0_dec_ring_insert_end - insert a end command
 *
 * @ring: amdgpu_ring pointer
 *
 * Write a end command to the ring.
 */
void vcn_v2_0_dec_ring_insert_end(struct amdgpu_ring *ring)
{
	struct amdgpu_device *adev = ring->adev;

	amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.cmd, 0));
	amdgpu_ring_write(ring, VCN_DEC_KMD_CMD | (VCN_DEC_CMD_PACKET_END << 1));
}

/**
 * vcn_v2_0_dec_ring_insert_nop - insert a nop command
 *
 * @ring: amdgpu_ring pointer
 *
 * Write a nop command to the ring.
 */
void vcn_v2_0_dec_ring_insert_nop(struct amdgpu_ring *ring, uint32_t count)
{
	struct amdgpu_device *adev = ring->adev;
	int i;

	WARN_ON(ring->wptr % 2 || count % 2);

	for (i = 0; i < count / 2; i++) {
		amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.nop, 0));
		amdgpu_ring_write(ring, 0);
	}
}

/**
 * vcn_v2_0_dec_ring_emit_fence - emit an fence & trap command
 *
 * @ring: amdgpu_ring pointer
 * @fence: fence to emit
 *
 * Write a fence and a trap command to the ring.
 */
void vcn_v2_0_dec_ring_emit_fence(struct amdgpu_ring *ring, u64 addr, u64 seq,
				unsigned flags)
{
	struct amdgpu_device *adev = ring->adev;

	WARN_ON(flags & AMDGPU_FENCE_FLAG_64BIT);
	amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.context_id, 0));
	amdgpu_ring_write(ring, seq);

	amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.data0, 0));
	amdgpu_ring_write(ring, addr & 0xffffffff);

	amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.data1, 0));
	amdgpu_ring_write(ring, upper_32_bits(addr) & 0xff);

	amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.cmd, 0));
	amdgpu_ring_write(ring, VCN_DEC_KMD_CMD | (VCN_DEC_CMD_FENCE << 1));

	amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.data0, 0));
	amdgpu_ring_write(ring, 0);

	amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.data1, 0));
	amdgpu_ring_write(ring, 0);

	amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.cmd, 0));

	amdgpu_ring_write(ring, VCN_DEC_KMD_CMD | (VCN_DEC_CMD_TRAP << 1));
}

/**
 * vcn_v2_0_dec_ring_emit_ib - execute indirect buffer
 *
 * @ring: amdgpu_ring pointer
 * @ib: indirect buffer to execute
 *
 * Write ring commands to execute the indirect buffer
 */
void vcn_v2_0_dec_ring_emit_ib(struct amdgpu_ring *ring,
			       struct amdgpu_job *job,
			       struct amdgpu_ib *ib,
			       uint32_t flags)
{
	struct amdgpu_device *adev = ring->adev;
	unsigned vmid = AMDGPU_JOB_GET_VMID(job);

	amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.ib_vmid, 0));
	amdgpu_ring_write(ring, vmid);

	amdgpu_ring_write(ring,	PACKET0(adev->vcn.internal.ib_bar_low, 0));
	amdgpu_ring_write(ring, lower_32_bits(ib->gpu_addr));
	amdgpu_ring_write(ring,	PACKET0(adev->vcn.internal.ib_bar_high, 0));
	amdgpu_ring_write(ring, upper_32_bits(ib->gpu_addr));
	amdgpu_ring_write(ring,	PACKET0(adev->vcn.internal.ib_size, 0));
	amdgpu_ring_write(ring, ib->length_dw);
}

void vcn_v2_0_dec_ring_emit_reg_wait(struct amdgpu_ring *ring, uint32_t reg,
				uint32_t val, uint32_t mask)
{
	struct amdgpu_device *adev = ring->adev;

	amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.data0, 0));
	amdgpu_ring_write(ring, reg << 2);

	amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.data1, 0));
	amdgpu_ring_write(ring, val);

	amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.gp_scratch8, 0));
	amdgpu_ring_write(ring, mask);

	amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.cmd, 0));

	amdgpu_ring_write(ring, VCN_DEC_KMD_CMD | (VCN_DEC_CMD_REG_READ_COND_WAIT << 1));
}

void vcn_v2_0_dec_ring_emit_vm_flush(struct amdgpu_ring *ring,
				unsigned vmid, uint64_t pd_addr)
{
	struct amdgpu_vmhub *hub = &ring->adev->vmhub[ring->funcs->vmhub];
	uint32_t data0, data1, mask;

	pd_addr = amdgpu_gmc_emit_flush_gpu_tlb(ring, vmid, pd_addr);

	/* wait for register write */
	data0 = hub->ctx0_ptb_addr_lo32 + vmid * 2;
	data1 = lower_32_bits(pd_addr);
	mask = 0xffffffff;
	vcn_v2_0_dec_ring_emit_reg_wait(ring, data0, data1, mask);
}

void vcn_v2_0_dec_ring_emit_wreg(struct amdgpu_ring *ring,
				uint32_t reg, uint32_t val)
{
	struct amdgpu_device *adev = ring->adev;

	amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.data0, 0));
	amdgpu_ring_write(ring, reg << 2);

	amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.data1, 0));
	amdgpu_ring_write(ring, val);

	amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.cmd, 0));

	amdgpu_ring_write(ring, VCN_DEC_KMD_CMD | (VCN_DEC_CMD_WRITE_REG << 1));
}

/**
 * vcn_v2_0_enc_ring_get_rptr - get enc read pointer
 *
 * @ring: amdgpu_ring pointer
 *
 * Returns the current hardware enc read pointer
 */
static uint64_t vcn_v2_0_enc_ring_get_rptr(struct amdgpu_ring *ring)
{
	struct amdgpu_device *adev = ring->adev;

	if (ring == &adev->vcn.inst->ring_enc[0])
		return RREG32_SOC15(UVD, 0, mmUVD_RB_RPTR);
	else
		return RREG32_SOC15(UVD, 0, mmUVD_RB_RPTR2);
}

 /**
 * vcn_v2_0_enc_ring_get_wptr - get enc write pointer
 *
 * @ring: amdgpu_ring pointer
 *
 * Returns the current hardware enc write pointer
 */
static uint64_t vcn_v2_0_enc_ring_get_wptr(struct amdgpu_ring *ring)
{
	struct amdgpu_device *adev = ring->adev;

	if (ring == &adev->vcn.inst->ring_enc[0]) {
		if (ring->use_doorbell)
			return adev->wb.wb[ring->wptr_offs];
		else
			return RREG32_SOC15(UVD, 0, mmUVD_RB_WPTR);
	} else {
		if (ring->use_doorbell)
			return adev->wb.wb[ring->wptr_offs];
		else
			return RREG32_SOC15(UVD, 0, mmUVD_RB_WPTR2);
	}
}

 /**
 * vcn_v2_0_enc_ring_set_wptr - set enc write pointer
 *
 * @ring: amdgpu_ring pointer
 *
 * Commits the enc write pointer to the hardware
 */
static void vcn_v2_0_enc_ring_set_wptr(struct amdgpu_ring *ring)
{
	struct amdgpu_device *adev = ring->adev;

	if (ring == &adev->vcn.inst->ring_enc[0]) {
		if (ring->use_doorbell) {
			adev->wb.wb[ring->wptr_offs] = lower_32_bits(ring->wptr);
			WDOORBELL32(ring->doorbell_index, lower_32_bits(ring->wptr));
		} else {
			WREG32_SOC15(UVD, 0, mmUVD_RB_WPTR, lower_32_bits(ring->wptr));
		}
	} else {
		if (ring->use_doorbell) {
			adev->wb.wb[ring->wptr_offs] = lower_32_bits(ring->wptr);
			WDOORBELL32(ring->doorbell_index, lower_32_bits(ring->wptr));
		} else {
			WREG32_SOC15(UVD, 0, mmUVD_RB_WPTR2, lower_32_bits(ring->wptr));
		}
	}
}

/**
 * vcn_v2_0_enc_ring_emit_fence - emit an enc fence & trap command
 *
 * @ring: amdgpu_ring pointer
 * @fence: fence to emit
 *
 * Write enc a fence and a trap command to the ring.
 */
void vcn_v2_0_enc_ring_emit_fence(struct amdgpu_ring *ring, u64 addr,
				u64 seq, unsigned flags)
{
	WARN_ON(flags & AMDGPU_FENCE_FLAG_64BIT);

	amdgpu_ring_write(ring, VCN_ENC_CMD_FENCE);
	amdgpu_ring_write(ring, addr);
	amdgpu_ring_write(ring, upper_32_bits(addr));
	amdgpu_ring_write(ring, seq);
	amdgpu_ring_write(ring, VCN_ENC_CMD_TRAP);
}

void vcn_v2_0_enc_ring_insert_end(struct amdgpu_ring *ring)
{
	amdgpu_ring_write(ring, VCN_ENC_CMD_END);
}

/**
 * vcn_v2_0_enc_ring_emit_ib - enc execute indirect buffer
 *
 * @ring: amdgpu_ring pointer
 * @ib: indirect buffer to execute
 *
 * Write enc ring commands to execute the indirect buffer
 */
void vcn_v2_0_enc_ring_emit_ib(struct amdgpu_ring *ring,
			       struct amdgpu_job *job,
			       struct amdgpu_ib *ib,
			       uint32_t flags)
{
	unsigned vmid = AMDGPU_JOB_GET_VMID(job);

	amdgpu_ring_write(ring, VCN_ENC_CMD_IB);
	amdgpu_ring_write(ring, vmid);
	amdgpu_ring_write(ring, lower_32_bits(ib->gpu_addr));
	amdgpu_ring_write(ring, upper_32_bits(ib->gpu_addr));
	amdgpu_ring_write(ring, ib->length_dw);
}

void vcn_v2_0_enc_ring_emit_reg_wait(struct amdgpu_ring *ring, uint32_t reg,
				uint32_t val, uint32_t mask)
{
	amdgpu_ring_write(ring, VCN_ENC_CMD_REG_WAIT);
	amdgpu_ring_write(ring, reg << 2);
	amdgpu_ring_write(ring, mask);
	amdgpu_ring_write(ring, val);
}

void vcn_v2_0_enc_ring_emit_vm_flush(struct amdgpu_ring *ring,
				unsigned int vmid, uint64_t pd_addr)
{
	struct amdgpu_vmhub *hub = &ring->adev->vmhub[ring->funcs->vmhub];

	pd_addr = amdgpu_gmc_emit_flush_gpu_tlb(ring, vmid, pd_addr);

	/* wait for reg writes */
	vcn_v2_0_enc_ring_emit_reg_wait(ring, hub->ctx0_ptb_addr_lo32 + vmid * 2,
					lower_32_bits(pd_addr), 0xffffffff);
}

void vcn_v2_0_enc_ring_emit_wreg(struct amdgpu_ring *ring, uint32_t reg, uint32_t val)
{
	amdgpu_ring_write(ring, VCN_ENC_CMD_REG_WRITE);
	amdgpu_ring_write(ring,	reg << 2);
	amdgpu_ring_write(ring, val);
}

static int vcn_v2_0_set_interrupt_state(struct amdgpu_device *adev,
					struct amdgpu_irq_src *source,
					unsigned type,
					enum amdgpu_interrupt_state state)
{
	return 0;
}

static int vcn_v2_0_process_interrupt(struct amdgpu_device *adev,
				      struct amdgpu_irq_src *source,
				      struct amdgpu_iv_entry *entry)
{
	DRM_DEBUG("IH: VCN TRAP\n");

	switch (entry->src_id) {
	case VCN_2_0__SRCID__UVD_SYSTEM_MESSAGE_INTERRUPT:
		amdgpu_fence_process(&adev->vcn.inst->ring_dec);
		break;
	case VCN_2_0__SRCID__UVD_ENC_GENERAL_PURPOSE:
		amdgpu_fence_process(&adev->vcn.inst->ring_enc[0]);
		break;
	case VCN_2_0__SRCID__UVD_ENC_LOW_LATENCY:
		amdgpu_fence_process(&adev->vcn.inst->ring_enc[1]);
		break;
	default:
		DRM_ERROR("Unhandled interrupt: %d %d\n",
			  entry->src_id, entry->src_data[0]);
		break;
	}

	return 0;
}

int vcn_v2_0_dec_ring_test_ring(struct amdgpu_ring *ring)
{
	struct amdgpu_device *adev = ring->adev;
	uint32_t tmp = 0;
	unsigned i;
	int r;

	WREG32(adev->vcn.inst[ring->me].external.scratch9, 0xCAFEDEAD);
	r = amdgpu_ring_alloc(ring, 4);
	if (r)
		return r;
	amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.cmd, 0));
	amdgpu_ring_write(ring, VCN_DEC_KMD_CMD | (VCN_DEC_CMD_PACKET_START << 1));
	amdgpu_ring_write(ring, PACKET0(adev->vcn.internal.scratch9, 0));
	amdgpu_ring_write(ring, 0xDEADBEEF);
	amdgpu_ring_commit(ring);
	for (i = 0; i < adev->usec_timeout; i++) {
		tmp = RREG32(adev->vcn.inst[ring->me].external.scratch9);
		if (tmp == 0xDEADBEEF)
			break;
		udelay(1);
	}

	if (i >= adev->usec_timeout)
		r = -ETIMEDOUT;

	return r;
}


static int vcn_v2_0_set_powergating_state(void *handle,
					  enum amd_powergating_state state)
{
	/* This doesn't actually powergate the VCN block.
	 * That's done in the dpm code via the SMC.  This
	 * just re-inits the block as necessary.  The actual
	 * gating still happens in the dpm code.  We should
	 * revisit this when there is a cleaner line between
	 * the smc and the hw blocks
	 */
	int ret;
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;

	if (state == adev->vcn.cur_state)
		return 0;

	if (state == AMD_PG_STATE_GATE)
		ret = vcn_v2_0_stop(adev);
	else
		ret = vcn_v2_0_start(adev);

	if (!ret)
		adev->vcn.cur_state = state;
	return ret;
}

static const struct amd_ip_funcs vcn_v2_0_ip_funcs = {
	.name = "vcn_v2_0",
	.early_init = vcn_v2_0_early_init,
	.late_init = NULL,
	.sw_init = vcn_v2_0_sw_init,
	.sw_fini = vcn_v2_0_sw_fini,
	.hw_init = vcn_v2_0_hw_init,
	.hw_fini = vcn_v2_0_hw_fini,
	.suspend = vcn_v2_0_suspend,
	.resume = vcn_v2_0_resume,
	.is_idle = vcn_v2_0_is_idle,
	.wait_for_idle = vcn_v2_0_wait_for_idle,
	.check_soft_reset = NULL,
	.pre_soft_reset = NULL,
	.soft_reset = NULL,
	.post_soft_reset = NULL,
	.set_clockgating_state = vcn_v2_0_set_clockgating_state,
	.set_powergating_state = vcn_v2_0_set_powergating_state,
};

static const struct amdgpu_ring_funcs vcn_v2_0_dec_ring_vm_funcs = {
	.type = AMDGPU_RING_TYPE_VCN_DEC,
	.align_mask = 0xf,
	.vmhub = AMDGPU_MMHUB_0,
	.get_rptr = vcn_v2_0_dec_ring_get_rptr,
	.get_wptr = vcn_v2_0_dec_ring_get_wptr,
	.set_wptr = vcn_v2_0_dec_ring_set_wptr,
	.emit_frame_size =
		SOC15_FLUSH_GPU_TLB_NUM_WREG * 6 +
		SOC15_FLUSH_GPU_TLB_NUM_REG_WAIT * 8 +
		8 + /* vcn_v2_0_dec_ring_emit_vm_flush */
		14 + 14 + /* vcn_v2_0_dec_ring_emit_fence x2 vm fence */
		6,
	.emit_ib_size = 8, /* vcn_v2_0_dec_ring_emit_ib */
	.emit_ib = vcn_v2_0_dec_ring_emit_ib,
	.emit_fence = vcn_v2_0_dec_ring_emit_fence,
	.emit_vm_flush = vcn_v2_0_dec_ring_emit_vm_flush,
	.test_ring = vcn_v2_0_dec_ring_test_ring,
	.test_ib = amdgpu_vcn_dec_ring_test_ib,
	.insert_nop = vcn_v2_0_dec_ring_insert_nop,
	.insert_start = vcn_v2_0_dec_ring_insert_start,
	.insert_end = vcn_v2_0_dec_ring_insert_end,
	.pad_ib = amdgpu_ring_generic_pad_ib,
	.begin_use = amdgpu_vcn_ring_begin_use,
	.end_use = amdgpu_vcn_ring_end_use,
	.emit_wreg = vcn_v2_0_dec_ring_emit_wreg,
	.emit_reg_wait = vcn_v2_0_dec_ring_emit_reg_wait,
	.emit_reg_write_reg_wait = amdgpu_ring_emit_reg_write_reg_wait_helper,
};

static const struct amdgpu_ring_funcs vcn_v2_0_enc_ring_vm_funcs = {
	.type = AMDGPU_RING_TYPE_VCN_ENC,
	.align_mask = 0x3f,
	.nop = VCN_ENC_CMD_NO_OP,
	.vmhub = AMDGPU_MMHUB_0,
	.get_rptr = vcn_v2_0_enc_ring_get_rptr,
	.get_wptr = vcn_v2_0_enc_ring_get_wptr,
	.set_wptr = vcn_v2_0_enc_ring_set_wptr,
	.emit_frame_size =
		SOC15_FLUSH_GPU_TLB_NUM_WREG * 3 +
		SOC15_FLUSH_GPU_TLB_NUM_REG_WAIT * 4 +
		4 + /* vcn_v2_0_enc_ring_emit_vm_flush */
		5 + 5 + /* vcn_v2_0_enc_ring_emit_fence x2 vm fence */
		1, /* vcn_v2_0_enc_ring_insert_end */
	.emit_ib_size = 5, /* vcn_v2_0_enc_ring_emit_ib */
	.emit_ib = vcn_v2_0_enc_ring_emit_ib,
	.emit_fence = vcn_v2_0_enc_ring_emit_fence,
	.emit_vm_flush = vcn_v2_0_enc_ring_emit_vm_flush,
	.test_ring = amdgpu_vcn_enc_ring_test_ring,
	.test_ib = amdgpu_vcn_enc_ring_test_ib,
	.insert_nop = amdgpu_ring_insert_nop,
	.insert_end = vcn_v2_0_enc_ring_insert_end,
	.pad_ib = amdgpu_ring_generic_pad_ib,
	.begin_use = amdgpu_vcn_ring_begin_use,
	.end_use = amdgpu_vcn_ring_end_use,
	.emit_wreg = vcn_v2_0_enc_ring_emit_wreg,
	.emit_reg_wait = vcn_v2_0_enc_ring_emit_reg_wait,
	.emit_reg_write_reg_wait = amdgpu_ring_emit_reg_write_reg_wait_helper,
};

static void vcn_v2_0_set_dec_ring_funcs(struct amdgpu_device *adev)
{
	adev->vcn.inst->ring_dec.funcs = &vcn_v2_0_dec_ring_vm_funcs;
	DRM_INFO("VCN decode is enabled in VM mode\n");
}

static void vcn_v2_0_set_enc_ring_funcs(struct amdgpu_device *adev)
{
	int i;

	for (i = 0; i < adev->vcn.num_enc_rings; ++i)
		adev->vcn.inst->ring_enc[i].funcs = &vcn_v2_0_enc_ring_vm_funcs;

	DRM_INFO("VCN encode is enabled in VM mode\n");
}

static const struct amdgpu_irq_src_funcs vcn_v2_0_irq_funcs = {
	.set = vcn_v2_0_set_interrupt_state,
	.process = vcn_v2_0_process_interrupt,
};

static void vcn_v2_0_set_irq_funcs(struct amdgpu_device *adev)
{
	adev->vcn.inst->irq.num_types = adev->vcn.num_enc_rings + 1;
	adev->vcn.inst->irq.funcs = &vcn_v2_0_irq_funcs;
}

const struct amdgpu_ip_block_version vcn_v2_0_ip_block =
{
		.type = AMD_IP_BLOCK_TYPE_VCN,
		.major = 2,
		.minor = 0,
		.rev = 0,
		.funcs = &vcn_v2_0_ip_funcs,
};