/*
 * Copyright 2020 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.
 *
 * Authors: Sonny Jiang <sonny.jiang@amd.com>
 */

#include <linux/firmware.h>

#include "amdgpu.h"
#include "amdgpu_uvd.h"
#include "sid.h"

#include "uvd/uvd_3_1_d.h"
#include "uvd/uvd_3_1_sh_mask.h"

#include "oss/oss_1_0_d.h"
#include "oss/oss_1_0_sh_mask.h"

/**
 * uvd_v3_1_ring_get_rptr - get read pointer
 *
 * @ring: amdgpu_ring pointer
 *
 * Returns the current hardware read pointer
 */
static uint64_t uvd_v3_1_ring_get_rptr(struct amdgpu_ring *ring)
{
        struct amdgpu_device *adev = ring->adev;

        return RREG32(mmUVD_RBC_RB_RPTR);
}

/**
 * uvd_v3_1_ring_get_wptr - get write pointer
 *
 * @ring: amdgpu_ring pointer
 *
 * Returns the current hardware write pointer
 */
static uint64_t uvd_v3_1_ring_get_wptr(struct amdgpu_ring *ring)
{
        struct amdgpu_device *adev = ring->adev;

        return RREG32(mmUVD_RBC_RB_WPTR);
}

/**
 * uvd_v3_1_ring_set_wptr - set write pointer
 *
 * @ring: amdgpu_ring pointer
 *
 * Commits the write pointer to the hardware
 */
static void uvd_v3_1_ring_set_wptr(struct amdgpu_ring *ring)
{
        struct amdgpu_device *adev = ring->adev;

        WREG32(mmUVD_RBC_RB_WPTR, lower_32_bits(ring->wptr));
}

/**
 * uvd_v3_1_ring_emit_ib - execute indirect buffer
 *
 * @ring: amdgpu_ring pointer
 * @job: iob associated with the indirect buffer
 * @ib: indirect buffer to execute
 * @flags: flags associated with the indirect buffer
 *
 * Write ring commands to execute the indirect buffer
 */
static void uvd_v3_1_ring_emit_ib(struct amdgpu_ring *ring,
                                  struct amdgpu_job *job,
                                  struct amdgpu_ib *ib,
                                  uint32_t flags)
{
        amdgpu_ring_write(ring, PACKET0(mmUVD_RBC_IB_BASE, 0));
        amdgpu_ring_write(ring, ib->gpu_addr);
        amdgpu_ring_write(ring, PACKET0(mmUVD_RBC_IB_SIZE, 0));
        amdgpu_ring_write(ring, ib->length_dw);
}

/**
 * uvd_v3_1_ring_emit_fence - emit an fence & trap command
 *
 * @ring: amdgpu_ring pointer
 * @addr: address
 * @seq: sequence number
 * @flags: fence related flags
 *
 * Write a fence and a trap command to the ring.
 */
static void uvd_v3_1_ring_emit_fence(struct amdgpu_ring *ring, u64 addr, u64 seq,
                                 unsigned flags)
{
        WARN_ON(flags & AMDGPU_FENCE_FLAG_64BIT);

        amdgpu_ring_write(ring, PACKET0(mmUVD_CONTEXT_ID, 0));
        amdgpu_ring_write(ring, seq);
        amdgpu_ring_write(ring, PACKET0(mmUVD_GPCOM_VCPU_DATA0, 0));
        amdgpu_ring_write(ring, addr & 0xffffffff);
        amdgpu_ring_write(ring, PACKET0(mmUVD_GPCOM_VCPU_DATA1, 0));
        amdgpu_ring_write(ring, upper_32_bits(addr) & 0xff);
        amdgpu_ring_write(ring, PACKET0(mmUVD_GPCOM_VCPU_CMD, 0));
        amdgpu_ring_write(ring, 0);

        amdgpu_ring_write(ring, PACKET0(mmUVD_GPCOM_VCPU_DATA0, 0));
        amdgpu_ring_write(ring, 0);
        amdgpu_ring_write(ring, PACKET0(mmUVD_GPCOM_VCPU_DATA1, 0));
        amdgpu_ring_write(ring, 0);
        amdgpu_ring_write(ring, PACKET0(mmUVD_GPCOM_VCPU_CMD, 0));
        amdgpu_ring_write(ring, 2);
}

/**
 * uvd_v3_1_ring_test_ring - register write test
 *
 * @ring: amdgpu_ring pointer
 *
 * Test if we can successfully write to the context register
 */
static int uvd_v3_1_ring_test_ring(struct amdgpu_ring *ring)
{
        struct amdgpu_device *adev = ring->adev;
        uint32_t tmp = 0;
        unsigned i;
        int r;

        WREG32(mmUVD_CONTEXT_ID, 0xCAFEDEAD);
        r = amdgpu_ring_alloc(ring, 3);
        if (r)
                return r;

        amdgpu_ring_write(ring, PACKET0(mmUVD_CONTEXT_ID, 0));
        amdgpu_ring_write(ring, 0xDEADBEEF);
        amdgpu_ring_commit(ring);
        for (i = 0; i < adev->usec_timeout; i++) {
                tmp = RREG32(mmUVD_CONTEXT_ID);
                if (tmp == 0xDEADBEEF)
                        break;
                udelay(1);
        }

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

        return r;
}

static void uvd_v3_1_ring_insert_nop(struct amdgpu_ring *ring, uint32_t count)
{
        int i;

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

        for (i = 0; i < count / 2; i++) {
                amdgpu_ring_write(ring, PACKET0(mmUVD_NO_OP, 0));
                amdgpu_ring_write(ring, 0);
        }
}

static const struct amdgpu_ring_funcs uvd_v3_1_ring_funcs = {
        .type = AMDGPU_RING_TYPE_UVD,
        .align_mask = 0xf,
        .support_64bit_ptrs = false,
        .no_user_fence = true,
        .get_rptr = uvd_v3_1_ring_get_rptr,
        .get_wptr = uvd_v3_1_ring_get_wptr,
        .set_wptr = uvd_v3_1_ring_set_wptr,
        .parse_cs = amdgpu_uvd_ring_parse_cs,
        .emit_frame_size =
                14, /* uvd_v3_1_ring_emit_fence  x1 no user fence */
        .emit_ib_size = 4, /* uvd_v3_1_ring_emit_ib */
        .emit_ib = uvd_v3_1_ring_emit_ib,
        .emit_fence = uvd_v3_1_ring_emit_fence,
        .test_ring = uvd_v3_1_ring_test_ring,
        .test_ib = amdgpu_uvd_ring_test_ib,
        .insert_nop = uvd_v3_1_ring_insert_nop,
        .pad_ib = amdgpu_ring_generic_pad_ib,
        .begin_use = amdgpu_uvd_ring_begin_use,
        .end_use = amdgpu_uvd_ring_end_use,
};

static void uvd_v3_1_set_ring_funcs(struct amdgpu_device *adev)
{
        adev->uvd.inst->ring.funcs = &uvd_v3_1_ring_funcs;
}

static void uvd_v3_1_set_dcm(struct amdgpu_device *adev,
                                                         bool sw_mode)
{
        u32 tmp, tmp2;

        WREG32_FIELD(UVD_CGC_GATE, REGS, 0);

        tmp = RREG32(mmUVD_CGC_CTRL);
        tmp &= ~(UVD_CGC_CTRL__CLK_OFF_DELAY_MASK | UVD_CGC_CTRL__CLK_GATE_DLY_TIMER_MASK);
        tmp |= UVD_CGC_CTRL__DYN_CLOCK_MODE_MASK |
                (1 << UVD_CGC_CTRL__CLK_GATE_DLY_TIMER__SHIFT) |
                (4 << UVD_CGC_CTRL__CLK_OFF_DELAY__SHIFT);

        if (sw_mode) {
                tmp &= ~0x7ffff800;
                tmp2 = UVD_CGC_CTRL2__DYN_OCLK_RAMP_EN_MASK |
                        UVD_CGC_CTRL2__DYN_RCLK_RAMP_EN_MASK |
                        (7 << UVD_CGC_CTRL2__GATER_DIV_ID__SHIFT);
        } else {
                tmp |= 0x7ffff800;
                tmp2 = 0;
        }

        WREG32(mmUVD_CGC_CTRL, tmp);
        WREG32_UVD_CTX(ixUVD_CGC_CTRL2, tmp2);
}

/**
 * uvd_v3_1_mc_resume - memory controller programming
 *
 * @adev: amdgpu_device pointer
 *
 * Let the UVD memory controller know it's offsets
 */
static void uvd_v3_1_mc_resume(struct amdgpu_device *adev)
{
        uint64_t addr;
        uint32_t size;

        /* programm the VCPU memory controller bits 0-27 */
        addr = (adev->uvd.inst->gpu_addr + AMDGPU_UVD_FIRMWARE_OFFSET) >> 3;
        size = AMDGPU_UVD_FIRMWARE_SIZE(adev) >> 3;
        WREG32(mmUVD_VCPU_CACHE_OFFSET0, addr);
        WREG32(mmUVD_VCPU_CACHE_SIZE0, size);

        addr += size;
        size = AMDGPU_UVD_HEAP_SIZE >> 3;
        WREG32(mmUVD_VCPU_CACHE_OFFSET1, addr);
        WREG32(mmUVD_VCPU_CACHE_SIZE1, size);

        addr += size;
        size = (AMDGPU_UVD_STACK_SIZE +
                (AMDGPU_UVD_SESSION_SIZE * adev->uvd.max_handles)) >> 3;
        WREG32(mmUVD_VCPU_CACHE_OFFSET2, addr);
        WREG32(mmUVD_VCPU_CACHE_SIZE2, size);

        /* bits 28-31 */
        addr = (adev->uvd.inst->gpu_addr >> 28) & 0xF;
        WREG32(mmUVD_LMI_ADDR_EXT, (addr << 12) | (addr << 0));

        /* bits 32-39 */
        addr = (adev->uvd.inst->gpu_addr >> 32) & 0xFF;
        WREG32(mmUVD_LMI_EXT40_ADDR, addr | (0x9 << 16) | (0x1 << 31));

        WREG32(mmUVD_UDEC_ADDR_CONFIG, adev->gfx.config.gb_addr_config);
        WREG32(mmUVD_UDEC_DB_ADDR_CONFIG, adev->gfx.config.gb_addr_config);
        WREG32(mmUVD_UDEC_DBW_ADDR_CONFIG, adev->gfx.config.gb_addr_config);
}

/**
 * uvd_v3_1_fw_validate - FW validation operation
 *
 * @adev: amdgpu_device pointer
 *
 * Initialate and check UVD validation.
 */
static int uvd_v3_1_fw_validate(struct amdgpu_device *adev)
{
        int i;
        uint32_t keysel = adev->uvd.keyselect;

        WREG32(mmUVD_FW_START, keysel);

        for (i = 0; i < 10; ++i) {
                mdelay(10);
                if (RREG32(mmUVD_FW_STATUS) & UVD_FW_STATUS__DONE_MASK)
                        break;
        }

        if (i == 10)
                return -ETIMEDOUT;

        if (!(RREG32(mmUVD_FW_STATUS) & UVD_FW_STATUS__PASS_MASK))
                return -EINVAL;

        for (i = 0; i < 10; ++i) {
                mdelay(10);
                if (!(RREG32(mmUVD_FW_STATUS) & UVD_FW_STATUS__BUSY_MASK))
                        break;
        }

        if (i == 10)
                return -ETIMEDOUT;

        return 0;
}

/**
 * uvd_v3_1_start - start UVD block
 *
 * @adev: amdgpu_device pointer
 *
 * Setup and start the UVD block
 */
static int uvd_v3_1_start(struct amdgpu_device *adev)
{
        struct amdgpu_ring *ring = &adev->uvd.inst->ring;
        uint32_t rb_bufsz;
        int i, j, r;
        u32 tmp;
        /* disable byte swapping */
        u32 lmi_swap_cntl = 0;
        u32 mp_swap_cntl = 0;

        /* set uvd busy */
        WREG32_P(mmUVD_STATUS, 1<<2, ~(1<<2));

        uvd_v3_1_set_dcm(adev, true);
        WREG32(mmUVD_CGC_GATE, 0);

        /* take UVD block out of reset */
        WREG32_P(mmSRBM_SOFT_RESET, 0, ~SRBM_SOFT_RESET__SOFT_RESET_UVD_MASK);
        mdelay(5);

        /* enable VCPU clock */
        WREG32(mmUVD_VCPU_CNTL,  1 << 9);

        /* disable interrupt */
        WREG32_P(mmUVD_MASTINT_EN, 0, ~(1 << 1));

#ifdef __BIG_ENDIAN
        /* swap (8 in 32) RB and IB */
        lmi_swap_cntl = 0xa;
        mp_swap_cntl = 0;
#endif
        WREG32(mmUVD_LMI_SWAP_CNTL, lmi_swap_cntl);
        WREG32(mmUVD_MP_SWAP_CNTL, mp_swap_cntl);

        /* initialize UVD memory controller */
        WREG32(mmUVD_LMI_CTRL, 0x40 | (1 << 8) | (1 << 13) |
                (1 << 21) | (1 << 9) | (1 << 20));

        tmp = RREG32(mmUVD_MPC_CNTL);
        WREG32(mmUVD_MPC_CNTL, tmp | 0x10);

        WREG32(mmUVD_MPC_SET_MUXA0, 0x40c2040);
        WREG32(mmUVD_MPC_SET_MUXA1, 0x0);
        WREG32(mmUVD_MPC_SET_MUXB0, 0x40c2040);
        WREG32(mmUVD_MPC_SET_MUXB1, 0x0);
        WREG32(mmUVD_MPC_SET_ALU, 0);
        WREG32(mmUVD_MPC_SET_MUX, 0x88);

        tmp = RREG32_UVD_CTX(ixUVD_LMI_CACHE_CTRL);
        WREG32_UVD_CTX(ixUVD_LMI_CACHE_CTRL, tmp & (~0x10));

        /* enable UMC */
        WREG32_P(mmUVD_LMI_CTRL2, 0, ~(1 << 8));

        WREG32_P(mmUVD_SOFT_RESET, 0, ~UVD_SOFT_RESET__LMI_SOFT_RESET_MASK);

        WREG32_P(mmUVD_SOFT_RESET, 0, ~UVD_SOFT_RESET__LMI_UMC_SOFT_RESET_MASK);

        WREG32_P(mmUVD_SOFT_RESET, 0, ~UVD_SOFT_RESET__VCPU_SOFT_RESET_MASK);

        mdelay(10);

        for (i = 0; i < 10; ++i) {
                uint32_t status;
                for (j = 0; j < 100; ++j) {
                        status = RREG32(mmUVD_STATUS);
                        if (status & 2)
                                break;
                        mdelay(10);
                }
                r = 0;
                if (status & 2)
                        break;

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

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

        /* enable interrupt */
        WREG32_P(mmUVD_MASTINT_EN, 3<<1, ~(3 << 1));

        WREG32_P(mmUVD_STATUS, 0, ~(1<<2));

        /* force RBC into idle state */
        WREG32(mmUVD_RBC_RB_CNTL, 0x11010101);

        /* Set the write pointer delay */
        WREG32(mmUVD_RBC_RB_WPTR_CNTL, 0);

        /* programm the 4GB memory segment for rptr and ring buffer */
        WREG32(mmUVD_LMI_EXT40_ADDR, upper_32_bits(ring->gpu_addr) |
                   (0x7 << 16) | (0x1 << 31));

        /* Initialize the ring buffer's read and write pointers */
        WREG32(mmUVD_RBC_RB_RPTR, 0x0);

        ring->wptr = RREG32(mmUVD_RBC_RB_RPTR);
        WREG32(mmUVD_RBC_RB_WPTR, lower_32_bits(ring->wptr));

        /* set the ring address */
        WREG32(mmUVD_RBC_RB_BASE, ring->gpu_addr);

        /* Set ring buffer size */
        rb_bufsz = order_base_2(ring->ring_size);
        rb_bufsz = (0x1 << 8) | rb_bufsz;
        WREG32_P(mmUVD_RBC_RB_CNTL, rb_bufsz, ~0x11f1f);

        return 0;
}

/**
 * uvd_v3_1_stop - stop UVD block
 *
 * @adev: amdgpu_device pointer
 *
 * stop the UVD block
 */
static void uvd_v3_1_stop(struct amdgpu_device *adev)
{
        uint32_t i, j;
        uint32_t status;

        WREG32(mmUVD_RBC_RB_CNTL, 0x11010101);

        for (i = 0; i < 10; ++i) {
                for (j = 0; j < 100; ++j) {
                        status = RREG32(mmUVD_STATUS);
                        if (status & 2)
                                break;
                        mdelay(1);
                }
                if (status & 2)
                        break;
        }

        for (i = 0; i < 10; ++i) {
                for (j = 0; j < 100; ++j) {
                        status = RREG32(mmUVD_LMI_STATUS);
                        if (status & 0xf)
                                break;
                        mdelay(1);
                }
                if (status & 0xf)
                        break;
        }

        /* Stall UMC and register bus before resetting VCPU */
        WREG32_P(mmUVD_LMI_CTRL2, 1 << 8, ~(1 << 8));

        for (i = 0; i < 10; ++i) {
                for (j = 0; j < 100; ++j) {
                        status = RREG32(mmUVD_LMI_STATUS);
                        if (status & 0x240)
                                break;
                        mdelay(1);
                }
                if (status & 0x240)
                        break;
        }

        WREG32_P(0x3D49, 0, ~(1 << 2));

        WREG32_P(mmUVD_VCPU_CNTL, 0, ~(1 << 9));

        /* put LMI, VCPU, RBC etc... into reset */
        WREG32(mmUVD_SOFT_RESET, UVD_SOFT_RESET__LMI_SOFT_RESET_MASK |
                UVD_SOFT_RESET__VCPU_SOFT_RESET_MASK |
                UVD_SOFT_RESET__LMI_UMC_SOFT_RESET_MASK);

        WREG32(mmUVD_STATUS, 0);

        uvd_v3_1_set_dcm(adev, false);
}

static int uvd_v3_1_set_interrupt_state(struct amdgpu_device *adev,
                                        struct amdgpu_irq_src *source,
                                        unsigned type,
                                        enum amdgpu_interrupt_state state)
{
        return 0;
}

static int uvd_v3_1_process_interrupt(struct amdgpu_device *adev,
                                      struct amdgpu_irq_src *source,
                                      struct amdgpu_iv_entry *entry)
{
        DRM_DEBUG("IH: UVD TRAP\n");
        amdgpu_fence_process(&adev->uvd.inst->ring);
        return 0;
}


static const struct amdgpu_irq_src_funcs uvd_v3_1_irq_funcs = {
        .set = uvd_v3_1_set_interrupt_state,
        .process = uvd_v3_1_process_interrupt,
};

static void uvd_v3_1_set_irq_funcs(struct amdgpu_device *adev)
{
        adev->uvd.inst->irq.num_types = 1;
        adev->uvd.inst->irq.funcs = &uvd_v3_1_irq_funcs;
}


static int uvd_v3_1_early_init(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
        adev->uvd.num_uvd_inst = 1;

        uvd_v3_1_set_ring_funcs(adev);
        uvd_v3_1_set_irq_funcs(adev);

        return 0;
}

static int uvd_v3_1_sw_init(void *handle)
{
        struct amdgpu_ring *ring;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
        int r;
        void *ptr;
        uint32_t ucode_len;

        /* UVD TRAP */
        r = amdgpu_irq_add_id(adev, AMDGPU_IRQ_CLIENTID_LEGACY, 124, &adev->uvd.inst->irq);
        if (r)
                return r;

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

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

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

        /* Retrieval firmware validate key */
        ptr = adev->uvd.inst[0].cpu_addr;
        ptr += 192 + 16;
        memcpy(&ucode_len, ptr, 4);
        ptr += ucode_len;
        memcpy(&adev->uvd.keyselect, ptr, 4);

        r = amdgpu_uvd_entity_init(adev);

        return r;
}

static int uvd_v3_1_sw_fini(void *handle)
{
        int r;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

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

        return amdgpu_uvd_sw_fini(adev);
}

static void uvd_v3_1_enable_mgcg(struct amdgpu_device *adev,
                                 bool enable)
{
        u32 orig, data;

        if (enable && (adev->cg_flags & AMD_CG_SUPPORT_UVD_MGCG)) {
                data = RREG32_UVD_CTX(ixUVD_CGC_MEM_CTRL);
                data |= 0x3fff;
                WREG32_UVD_CTX(ixUVD_CGC_MEM_CTRL, data);

                orig = data = RREG32(mmUVD_CGC_CTRL);
                data |= UVD_CGC_CTRL__DYN_CLOCK_MODE_MASK;
                if (orig != data)
                        WREG32(mmUVD_CGC_CTRL, data);
        } else {
                data = RREG32_UVD_CTX(ixUVD_CGC_MEM_CTRL);
                data &= ~0x3fff;
                WREG32_UVD_CTX(ixUVD_CGC_MEM_CTRL, data);

                orig = data = RREG32(mmUVD_CGC_CTRL);
                data &= ~UVD_CGC_CTRL__DYN_CLOCK_MODE_MASK;
                if (orig != data)
                        WREG32(mmUVD_CGC_CTRL, data);
        }
}

/**
 * uvd_v3_1_hw_init - start and test UVD block
 *
 * @handle: handle used to pass amdgpu_device pointer
 *
 * Initialize the hardware, boot up the VCPU and do some testing
 */
static int uvd_v3_1_hw_init(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
        struct amdgpu_ring *ring = &adev->uvd.inst->ring;
        uint32_t tmp;
        int r;

        uvd_v3_1_mc_resume(adev);

        r = uvd_v3_1_fw_validate(adev);
        if (r) {
                DRM_ERROR("amdgpu: UVD Firmware validate fail (%d).\n", r);
                return r;
        }

        uvd_v3_1_enable_mgcg(adev, true);
        amdgpu_asic_set_uvd_clocks(adev, 53300, 40000);

        uvd_v3_1_start(adev);

        r = amdgpu_ring_test_helper(ring);
        if (r) {
                DRM_ERROR("amdgpu: UVD ring test fail (%d).\n", r);
                goto done;
        }

        r = amdgpu_ring_alloc(ring, 10);
        if (r) {
                DRM_ERROR("amdgpu: ring failed to lock UVD ring (%d).\n", r);
                goto done;
        }

        tmp = PACKET0(mmUVD_SEMA_WAIT_FAULT_TIMEOUT_CNTL, 0);
        amdgpu_ring_write(ring, tmp);
        amdgpu_ring_write(ring, 0xFFFFF);

        tmp = PACKET0(mmUVD_SEMA_WAIT_INCOMPLETE_TIMEOUT_CNTL, 0);
        amdgpu_ring_write(ring, tmp);
        amdgpu_ring_write(ring, 0xFFFFF);

        tmp = PACKET0(mmUVD_SEMA_SIGNAL_INCOMPLETE_TIMEOUT_CNTL, 0);
        amdgpu_ring_write(ring, tmp);
        amdgpu_ring_write(ring, 0xFFFFF);

        /* Clear timeout status bits */
        amdgpu_ring_write(ring, PACKET0(mmUVD_SEMA_TIMEOUT_STATUS, 0));
        amdgpu_ring_write(ring, 0x8);

        amdgpu_ring_write(ring, PACKET0(mmUVD_SEMA_CNTL, 0));
        amdgpu_ring_write(ring, 3);

        amdgpu_ring_commit(ring);

done:
        if (!r)
                DRM_INFO("UVD initialized successfully.\n");

        return r;
}

/**
 * uvd_v3_1_hw_fini - stop the hardware block
 *
 * @handle: handle used to pass amdgpu_device pointer
 *
 * Stop the UVD block, mark ring as not ready any more
 */
static int uvd_v3_1_hw_fini(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        /*
         * Proper cleanups before halting the HW engine:
         *   - cancel the delayed idle work
         *   - enable powergating
         *   - enable clockgating
         *   - disable dpm
         *
         * TODO: to align with the VCN implementation, move the
         * jobs for clockgating/powergating/dpm setting to
         * ->set_powergating_state().
         */
        cancel_delayed_work_sync(&adev->uvd.idle_work);

        if (adev->pm.dpm_enabled) {
                amdgpu_dpm_enable_uvd(adev, false);
        } else {
                amdgpu_asic_set_uvd_clocks(adev, 0, 0);
                /* shutdown the UVD block */
                amdgpu_device_ip_set_powergating_state(adev, AMD_IP_BLOCK_TYPE_UVD,
                                                       AMD_PG_STATE_GATE);
                amdgpu_device_ip_set_clockgating_state(adev, AMD_IP_BLOCK_TYPE_UVD,
                                                       AMD_CG_STATE_GATE);
        }

        if (RREG32(mmUVD_STATUS) != 0)
                uvd_v3_1_stop(adev);

        return 0;
}

static int uvd_v3_1_suspend(void *handle)
{
        int r;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        r = uvd_v3_1_hw_fini(adev);
        if (r)
                return r;

        return amdgpu_uvd_suspend(adev);
}

static int uvd_v3_1_resume(void *handle)
{
        int r;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

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

        return uvd_v3_1_hw_init(adev);
}

static bool uvd_v3_1_is_idle(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        return !(RREG32(mmSRBM_STATUS) & SRBM_STATUS__UVD_BUSY_MASK);
}

static int uvd_v3_1_wait_for_idle(void *handle)
{
        unsigned i;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        for (i = 0; i < adev->usec_timeout; i++) {
                if (!(RREG32(mmSRBM_STATUS) & SRBM_STATUS__UVD_BUSY_MASK))
                        return 0;
        }
        return -ETIMEDOUT;
}

static int uvd_v3_1_soft_reset(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        uvd_v3_1_stop(adev);

        WREG32_P(mmSRBM_SOFT_RESET, SRBM_SOFT_RESET__SOFT_RESET_UVD_MASK,
                         ~SRBM_SOFT_RESET__SOFT_RESET_UVD_MASK);
        mdelay(5);

        return uvd_v3_1_start(adev);
}

static int uvd_v3_1_set_clockgating_state(void *handle,
                                          enum amd_clockgating_state state)
{
        return 0;
}

static int uvd_v3_1_set_powergating_state(void *handle,
                                          enum amd_powergating_state state)
{
        return 0;
}

static const struct amd_ip_funcs uvd_v3_1_ip_funcs = {
        .name = "uvd_v3_1",
        .early_init = uvd_v3_1_early_init,
        .late_init = NULL,
        .sw_init = uvd_v3_1_sw_init,
        .sw_fini = uvd_v3_1_sw_fini,
        .hw_init = uvd_v3_1_hw_init,
        .hw_fini = uvd_v3_1_hw_fini,
        .suspend = uvd_v3_1_suspend,
        .resume = uvd_v3_1_resume,
        .is_idle = uvd_v3_1_is_idle,
        .wait_for_idle = uvd_v3_1_wait_for_idle,
        .soft_reset = uvd_v3_1_soft_reset,
        .set_clockgating_state = uvd_v3_1_set_clockgating_state,
        .set_powergating_state = uvd_v3_1_set_powergating_state,
};

const struct amdgpu_ip_block_version uvd_v3_1_ip_block =
{
        .type = AMD_IP_BLOCK_TYPE_UVD,
        .major = 3,
        .minor = 1,
        .rev = 0,
        .funcs = &uvd_v3_1_ip_funcs,
};