drm/amdgpu: Add support for CIK parts

This patch adds support for CIK parts.  These parts
are also supported by radeon which is the preferred
option, so there is a config option to enable support
for CIK parts in amdgpu for testing.

Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Jammy Zhou <Jammy.Zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 888 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/uvd_v4_2.c b/drivers/gpu/drm/amd/amdgpu/uvd_v4_2.c
new file mode 100644
index 000000000000..6e4cb604f928
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/uvd_v4_2.c
@@ -0,0 +1,888 @@
+/*
+ * Copyright 2013 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: Christian König <christian.koenig@amd.com>
+ */
+
+#include <linux/firmware.h>
+#include <drm/drmP.h>
+#include "amdgpu.h"
+#include "amdgpu_uvd.h"
+#include "cikd.h"
+
+#include "uvd/uvd_4_2_d.h"
+#include "uvd/uvd_4_2_sh_mask.h"
+
+#include "oss/oss_2_0_d.h"
+#include "oss/oss_2_0_sh_mask.h"
+
+static void uvd_v4_2_mc_resume(struct amdgpu_device *adev);
+static void uvd_v4_2_init_cg(struct amdgpu_device *adev);
+static void uvd_v4_2_set_ring_funcs(struct amdgpu_device *adev);
+static void uvd_v4_2_set_irq_funcs(struct amdgpu_device *adev);
+static int uvd_v4_2_start(struct amdgpu_device *adev);
+static void uvd_v4_2_stop(struct amdgpu_device *adev);
+
+/**
+ * uvd_v4_2_ring_get_rptr - get read pointer
+ *
+ * @ring: amdgpu_ring pointer
+ *
+ * Returns the current hardware read pointer
+ */
+static uint32_t uvd_v4_2_ring_get_rptr(struct amdgpu_ring *ring)
+{
+	struct amdgpu_device *adev = ring->adev;
+
+	return RREG32(mmUVD_RBC_RB_RPTR);
+}
+
+/**
+ * uvd_v4_2_ring_get_wptr - get write pointer
+ *
+ * @ring: amdgpu_ring pointer
+ *
+ * Returns the current hardware write pointer
+ */
+static uint32_t uvd_v4_2_ring_get_wptr(struct amdgpu_ring *ring)
+{
+	struct amdgpu_device *adev = ring->adev;
+
+	return RREG32(mmUVD_RBC_RB_WPTR);
+}
+
+/**
+ * uvd_v4_2_ring_set_wptr - set write pointer
+ *
+ * @ring: amdgpu_ring pointer
+ *
+ * Commits the write pointer to the hardware
+ */
+static void uvd_v4_2_ring_set_wptr(struct amdgpu_ring *ring)
+{
+	struct amdgpu_device *adev = ring->adev;
+
+	WREG32(mmUVD_RBC_RB_WPTR, ring->wptr);
+}
+
+static int uvd_v4_2_early_init(struct amdgpu_device *adev)
+{
+	uvd_v4_2_set_ring_funcs(adev);
+	uvd_v4_2_set_irq_funcs(adev);
+
+	return 0;
+}
+
+static int uvd_v4_2_sw_init(struct amdgpu_device *adev)
+{
+	struct amdgpu_ring *ring;
+	int r;
+
+	/* UVD TRAP */
+	r = amdgpu_irq_add_id(adev, 124, &adev->uvd.irq);
+	if (r)
+		return r;
+
+	r = amdgpu_uvd_sw_init(adev);
+	if (r)
+		return r;
+
+	r = amdgpu_uvd_resume(adev);
+	if (r)
+		return r;
+
+	ring = &adev->uvd.ring;
+	sprintf(ring->name, "uvd");
+	r = amdgpu_ring_init(adev, ring, 4096, CP_PACKET2, 0xf,
+			     &adev->uvd.irq, 0, AMDGPU_RING_TYPE_UVD);
+
+	return r;
+}
+
+static int uvd_v4_2_sw_fini(struct amdgpu_device *adev)
+{
+	int r;
+
+	r = amdgpu_uvd_suspend(adev);
+	if (r)
+		return r;
+
+	r = amdgpu_uvd_sw_fini(adev);
+	if (r)
+		return r;
+
+	return r;
+}
+
+/**
+ * uvd_v4_2_hw_init - start and test UVD block
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Initialize the hardware, boot up the VCPU and do some testing
+ */
+static int uvd_v4_2_hw_init(struct amdgpu_device *adev)
+{
+	struct amdgpu_ring *ring = &adev->uvd.ring;
+	uint32_t tmp;
+	int r;
+
+	/* raise clocks while booting up the VCPU */
+	amdgpu_asic_set_uvd_clocks(adev, 53300, 40000);
+
+	r = uvd_v4_2_start(adev);
+	if (r)
+		goto done;
+
+	ring->ready = true;
+	r = amdgpu_ring_test_ring(ring);
+	if (r) {
+		ring->ready = false;
+		goto done;
+	}
+
+	r = amdgpu_ring_lock(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_unlock_commit(ring);
+
+done:
+	/* lower clocks again */
+	amdgpu_asic_set_uvd_clocks(adev, 0, 0);
+
+	if (!r)
+		DRM_INFO("UVD initialized successfully.\n");
+
+	return r;
+}
+
+/**
+ * uvd_v4_2_hw_fini - stop the hardware block
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Stop the UVD block, mark ring as not ready any more
+ */
+static int uvd_v4_2_hw_fini(struct amdgpu_device *adev)
+{
+	struct amdgpu_ring *ring = &adev->uvd.ring;
+
+	uvd_v4_2_stop(adev);
+	ring->ready = false;
+
+	return 0;
+}
+
+static int uvd_v4_2_suspend(struct amdgpu_device *adev)
+{
+	int r;
+
+	r = uvd_v4_2_hw_fini(adev);
+	if (r)
+		return r;
+
+	r = amdgpu_uvd_suspend(adev);
+	if (r)
+		return r;
+
+	return r;
+}
+
+static int uvd_v4_2_resume(struct amdgpu_device *adev)
+{
+	int r;
+
+	r = amdgpu_uvd_resume(adev);
+	if (r)
+		return r;
+
+	r = uvd_v4_2_hw_init(adev);
+	if (r)
+		return r;
+
+	return r;
+}
+
+/**
+ * uvd_v4_2_start - start UVD block
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Setup and start the UVD block
+ */
+static int uvd_v4_2_start(struct amdgpu_device *adev)
+{
+	struct amdgpu_ring *ring = &adev->uvd.ring;
+	uint32_t rb_bufsz;
+	int i, j, r;
+
+	/* disable byte swapping */
+	u32 lmi_swap_cntl = 0;
+	u32 mp_swap_cntl = 0;
+
+	uvd_v4_2_mc_resume(adev);
+
+	/* disable clock gating */
+	WREG32(mmUVD_CGC_GATE, 0);
+
+	/* disable interupt */
+	WREG32_P(mmUVD_MASTINT_EN, 0, ~(1 << 1));
+
+	/* Stall UMC and register bus before resetting VCPU */
+	WREG32_P(mmUVD_LMI_CTRL2, 1 << 8, ~(1 << 8));
+	mdelay(1);
+
+	/* 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__LBSI_SOFT_RESET_MASK |
+		UVD_SOFT_RESET__RBC_SOFT_RESET_MASK | UVD_SOFT_RESET__CSM_SOFT_RESET_MASK |
+		UVD_SOFT_RESET__CXW_SOFT_RESET_MASK | UVD_SOFT_RESET__TAP_SOFT_RESET_MASK |
+		UVD_SOFT_RESET__LMI_UMC_SOFT_RESET_MASK);
+	mdelay(5);
+
+	/* take UVD block out of reset */
+	WREG32_P(mmSRBM_SOFT_RESET, 0, ~SRBM_SOFT_RESET__SOFT_RESET_UVD_MASK);
+	mdelay(5);
+
+	/* initialize UVD memory controller */
+	WREG32(mmUVD_LMI_CTRL, 0x40 | (1 << 8) | (1 << 13) |
+			     (1 << 21) | (1 << 9) | (1 << 20));
+
+#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);
+
+	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);
+
+	/* take all subblocks out of reset, except VCPU */
+	WREG32(mmUVD_SOFT_RESET, UVD_SOFT_RESET__VCPU_SOFT_RESET_MASK);
+	mdelay(5);
+
+	/* enable VCPU clock */
+	WREG32(mmUVD_VCPU_CNTL,  1 << 9);
+
+	/* enable UMC */
+	WREG32_P(mmUVD_LMI_CTRL2, 0, ~(1 << 8));
+
+	/* boot up the VCPU */
+	WREG32(mmUVD_SOFT_RESET, 0);
+	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 interupt */
+	WREG32_P(mmUVD_MASTINT_EN, 3<<1, ~(3 << 1));
+
+	/* 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, 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_v4_2_stop - stop UVD block
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * stop the UVD block
+ */
+static void uvd_v4_2_stop(struct amdgpu_device *adev)
+{
+	/* force RBC into idle state */
+	WREG32(mmUVD_RBC_RB_CNTL, 0x11010101);
+
+	/* Stall UMC and register bus before resetting VCPU */
+	WREG32_P(mmUVD_LMI_CTRL2, 1 << 8, ~(1 << 8));
+	mdelay(1);
+
+	/* put VCPU into reset */
+	WREG32(mmUVD_SOFT_RESET, UVD_SOFT_RESET__VCPU_SOFT_RESET_MASK);
+	mdelay(5);
+
+	/* disable VCPU clock */
+	WREG32(mmUVD_VCPU_CNTL, 0x0);
+
+	/* Unstall UMC and register bus */
+	WREG32_P(mmUVD_LMI_CTRL2, 0, ~(1 << 8));
+}
+
+/**
+ * uvd_v4_2_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.
+ */
+static void uvd_v4_2_ring_emit_fence(struct amdgpu_ring *ring, u64 addr, u64 seq,
+				     bool write64bit)
+{
+	WARN_ON(write64bit);
+
+	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_v4_2_ring_emit_semaphore - emit semaphore command
+ *
+ * @ring: amdgpu_ring pointer
+ * @semaphore: semaphore to emit commands for
+ * @emit_wait: true if we should emit a wait command
+ *
+ * Emit a semaphore command (either wait or signal) to the UVD ring.
+ */
+static bool uvd_v4_2_ring_emit_semaphore(struct amdgpu_ring *ring,
+					 struct amdgpu_semaphore *semaphore,
+					 bool emit_wait)
+{
+	uint64_t addr = semaphore->gpu_addr;
+
+	amdgpu_ring_write(ring, PACKET0(mmUVD_SEMA_ADDR_LOW, 0));
+	amdgpu_ring_write(ring, (addr >> 3) & 0x000FFFFF);
+
+	amdgpu_ring_write(ring, PACKET0(mmUVD_SEMA_ADDR_HIGH, 0));
+	amdgpu_ring_write(ring, (addr >> 23) & 0x000FFFFF);
+
+	amdgpu_ring_write(ring, PACKET0(mmUVD_SEMA_CMD, 0));
+	amdgpu_ring_write(ring, 0x80 | (emit_wait ? 1 : 0));
+
+	return true;
+}
+
+/**
+ * uvd_v4_2_ring_test_ring - register write test
+ *
+ * @ring: amdgpu_ring pointer
+ *
+ * Test if we can successfully write to the context register
+ */
+static int uvd_v4_2_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_lock(ring, 3);
+	if (r) {
+		DRM_ERROR("amdgpu: cp failed to lock ring %d (%d).\n",
+			  ring->idx, r);
+		return r;
+	}
+	amdgpu_ring_write(ring, PACKET0(mmUVD_CONTEXT_ID, 0));
+	amdgpu_ring_write(ring, 0xDEADBEEF);
+	amdgpu_ring_unlock_commit(ring);
+	for (i = 0; i < adev->usec_timeout; i++) {
+		tmp = RREG32(mmUVD_CONTEXT_ID);
+		if (tmp == 0xDEADBEEF)
+			break;
+		DRM_UDELAY(1);
+	}
+
+	if (i < adev->usec_timeout) {
+		DRM_INFO("ring test on %d succeeded in %d usecs\n",
+			 ring->idx, i);
+	} else {
+		DRM_ERROR("amdgpu: ring %d test failed (0x%08X)\n",
+			  ring->idx, tmp);
+		r = -EINVAL;
+	}
+	return r;
+}
+
+/**
+ * uvd_v4_2_ring_emit_ib - execute indirect buffer
+ *
+ * @ring: amdgpu_ring pointer
+ * @ib: indirect buffer to execute
+ *
+ * Write ring commands to execute the indirect buffer
+ */
+static void uvd_v4_2_ring_emit_ib(struct amdgpu_ring *ring,
+				  struct amdgpu_ib *ib)
+{
+	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_v4_2_ring_test_ib - test ib execution
+ *
+ * @ring: amdgpu_ring pointer
+ *
+ * Test if we can successfully execute an IB
+ */
+static int uvd_v4_2_ring_test_ib(struct amdgpu_ring *ring)
+{
+	struct amdgpu_device *adev = ring->adev;
+	struct amdgpu_fence *fence = NULL;
+	int r;
+
+	r = amdgpu_asic_set_uvd_clocks(adev, 53300, 40000);
+	if (r) {
+		DRM_ERROR("amdgpu: failed to raise UVD clocks (%d).\n", r);
+		return r;
+	}
+
+	r = amdgpu_uvd_get_create_msg(ring, 1, NULL);
+	if (r) {
+		DRM_ERROR("amdgpu: failed to get create msg (%d).\n", r);
+		goto error;
+	}
+
+	r = amdgpu_uvd_get_destroy_msg(ring, 1, &fence);
+	if (r) {
+		DRM_ERROR("amdgpu: failed to get destroy ib (%d).\n", r);
+		goto error;
+	}
+
+	r = amdgpu_fence_wait(fence, false);
+	if (r) {
+		DRM_ERROR("amdgpu: fence wait failed (%d).\n", r);
+		goto error;
+	}
+	DRM_INFO("ib test on ring %d succeeded\n",  ring->idx);
+error:
+	amdgpu_fence_unref(&fence);
+	amdgpu_asic_set_uvd_clocks(adev, 0, 0);
+	return r;
+}
+
+/**
+ * uvd_v4_2_mc_resume - memory controller programming
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Let the UVD memory controller know it's offsets
+ */
+static void uvd_v4_2_mc_resume(struct amdgpu_device *adev)
+{
+	uint64_t addr;
+	uint32_t size;
+
+	/* programm the VCPU memory controller bits 0-27 */
+	addr = (adev->uvd.gpu_addr + AMDGPU_UVD_FIRMWARE_OFFSET) >> 3;
+	size = AMDGPU_GPU_PAGE_ALIGN(adev->uvd.fw->size + 4) >> 3;
+	WREG32(mmUVD_VCPU_CACHE_OFFSET0, addr);
+	WREG32(mmUVD_VCPU_CACHE_SIZE0, size);
+
+	addr += size;
+	size = AMDGPU_UVD_STACK_SIZE >> 3;
+	WREG32(mmUVD_VCPU_CACHE_OFFSET1, addr);
+	WREG32(mmUVD_VCPU_CACHE_SIZE1, size);
+
+	addr += size;
+	size = AMDGPU_UVD_HEAP_SIZE >> 3;
+	WREG32(mmUVD_VCPU_CACHE_OFFSET2, addr);
+	WREG32(mmUVD_VCPU_CACHE_SIZE2, size);
+
+	/* bits 28-31 */
+	addr = (adev->uvd.gpu_addr >> 28) & 0xF;
+	WREG32(mmUVD_LMI_ADDR_EXT, (addr << 12) | (addr << 0));
+
+	/* bits 32-39 */
+	addr = (adev->uvd.gpu_addr >> 32) & 0xFF;
+	WREG32(mmUVD_LMI_EXT40_ADDR, addr | (0x9 << 16) | (0x1 << 31));
+
+	uvd_v4_2_init_cg(adev);
+}
+
+static void uvd_v4_2_enable_mgcg(struct amdgpu_device *adev,
+				 bool enable)
+{
+	u32 orig, data;
+
+	if (enable && (adev->cg_flags & AMDGPU_CG_SUPPORT_UVD_MGCG)) {
+		data = RREG32_UVD_CTX(ixUVD_CGC_MEM_CTRL);
+		data = 0xfff;
+		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 &= ~0xfff;
+		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);
+	}
+}
+
+static void uvd_v4_2_set_dcm(struct amdgpu_device *adev,
+			     bool sw_mode)
+{
+	u32 tmp, tmp2;
+
+	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);
+}
+
+static void uvd_v4_2_init_cg(struct amdgpu_device *adev)
+{
+	bool hw_mode = true;
+
+	if (hw_mode) {
+		uvd_v4_2_set_dcm(adev, false);
+	} else {
+		u32 tmp = RREG32(mmUVD_CGC_CTRL);
+		tmp &= ~UVD_CGC_CTRL__DYN_CLOCK_MODE_MASK;
+		WREG32(mmUVD_CGC_CTRL, tmp);
+	}
+}
+
+static bool uvd_v4_2_is_idle(struct amdgpu_device *adev)
+{
+	return !(RREG32(mmSRBM_STATUS) & SRBM_STATUS__UVD_BUSY_MASK);
+}
+
+static int uvd_v4_2_wait_for_idle(struct amdgpu_device *adev)
+{
+	unsigned i;
+
+	for (i = 0; i < adev->usec_timeout; i++) {
+		if (!(RREG32(mmSRBM_STATUS) & SRBM_STATUS__UVD_BUSY_MASK))
+			return 0;
+	}
+	return -ETIMEDOUT;
+}
+
+static int uvd_v4_2_soft_reset(struct amdgpu_device *adev)
+{
+	uvd_v4_2_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_v4_2_start(adev);
+}
+
+static void uvd_v4_2_print_status(struct amdgpu_device *adev)
+{
+	dev_info(adev->dev, "UVD 4.2 registers\n");
+	dev_info(adev->dev, "  UVD_SEMA_ADDR_LOW=0x%08X\n",
+		 RREG32(mmUVD_SEMA_ADDR_LOW));
+	dev_info(adev->dev, "  UVD_SEMA_ADDR_HIGH=0x%08X\n",
+		 RREG32(mmUVD_SEMA_ADDR_HIGH));
+	dev_info(adev->dev, "  UVD_SEMA_CMD=0x%08X\n",
+		 RREG32(mmUVD_SEMA_CMD));
+	dev_info(adev->dev, "  UVD_GPCOM_VCPU_CMD=0x%08X\n",
+		 RREG32(mmUVD_GPCOM_VCPU_CMD));
+	dev_info(adev->dev, "  UVD_GPCOM_VCPU_DATA0=0x%08X\n",
+		 RREG32(mmUVD_GPCOM_VCPU_DATA0));
+	dev_info(adev->dev, "  UVD_GPCOM_VCPU_DATA1=0x%08X\n",
+		 RREG32(mmUVD_GPCOM_VCPU_DATA1));
+	dev_info(adev->dev, "  UVD_ENGINE_CNTL=0x%08X\n",
+		 RREG32(mmUVD_ENGINE_CNTL));
+	dev_info(adev->dev, "  UVD_UDEC_ADDR_CONFIG=0x%08X\n",
+		 RREG32(mmUVD_UDEC_ADDR_CONFIG));
+	dev_info(adev->dev, "  UVD_UDEC_DB_ADDR_CONFIG=0x%08X\n",
+		 RREG32(mmUVD_UDEC_DB_ADDR_CONFIG));
+	dev_info(adev->dev, "  UVD_UDEC_DBW_ADDR_CONFIG=0x%08X\n",
+		 RREG32(mmUVD_UDEC_DBW_ADDR_CONFIG));
+	dev_info(adev->dev, "  UVD_SEMA_CNTL=0x%08X\n",
+		 RREG32(mmUVD_SEMA_CNTL));
+	dev_info(adev->dev, "  UVD_LMI_EXT40_ADDR=0x%08X\n",
+		 RREG32(mmUVD_LMI_EXT40_ADDR));
+	dev_info(adev->dev, "  UVD_CTX_INDEX=0x%08X\n",
+		 RREG32(mmUVD_CTX_INDEX));
+	dev_info(adev->dev, "  UVD_CTX_DATA=0x%08X\n",
+		 RREG32(mmUVD_CTX_DATA));
+	dev_info(adev->dev, "  UVD_CGC_GATE=0x%08X\n",
+		 RREG32(mmUVD_CGC_GATE));
+	dev_info(adev->dev, "  UVD_CGC_CTRL=0x%08X\n",
+		 RREG32(mmUVD_CGC_CTRL));
+	dev_info(adev->dev, "  UVD_LMI_CTRL2=0x%08X\n",
+		 RREG32(mmUVD_LMI_CTRL2));
+	dev_info(adev->dev, "  UVD_MASTINT_EN=0x%08X\n",
+		 RREG32(mmUVD_MASTINT_EN));
+	dev_info(adev->dev, "  UVD_LMI_ADDR_EXT=0x%08X\n",
+		 RREG32(mmUVD_LMI_ADDR_EXT));
+	dev_info(adev->dev, "  UVD_LMI_CTRL=0x%08X\n",
+		 RREG32(mmUVD_LMI_CTRL));
+	dev_info(adev->dev, "  UVD_LMI_SWAP_CNTL=0x%08X\n",
+		 RREG32(mmUVD_LMI_SWAP_CNTL));
+	dev_info(adev->dev, "  UVD_MP_SWAP_CNTL=0x%08X\n",
+		 RREG32(mmUVD_MP_SWAP_CNTL));
+	dev_info(adev->dev, "  UVD_MPC_SET_MUXA0=0x%08X\n",
+		 RREG32(mmUVD_MPC_SET_MUXA0));
+	dev_info(adev->dev, "  UVD_MPC_SET_MUXA1=0x%08X\n",
+		 RREG32(mmUVD_MPC_SET_MUXA1));
+	dev_info(adev->dev, "  UVD_MPC_SET_MUXB0=0x%08X\n",
+		 RREG32(mmUVD_MPC_SET_MUXB0));
+	dev_info(adev->dev, "  UVD_MPC_SET_MUXB1=0x%08X\n",
+		 RREG32(mmUVD_MPC_SET_MUXB1));
+	dev_info(adev->dev, "  UVD_MPC_SET_MUX=0x%08X\n",
+		 RREG32(mmUVD_MPC_SET_MUX));
+	dev_info(adev->dev, "  UVD_MPC_SET_ALU=0x%08X\n",
+		 RREG32(mmUVD_MPC_SET_ALU));
+	dev_info(adev->dev, "  UVD_VCPU_CACHE_OFFSET0=0x%08X\n",
+		 RREG32(mmUVD_VCPU_CACHE_OFFSET0));
+	dev_info(adev->dev, "  UVD_VCPU_CACHE_SIZE0=0x%08X\n",
+		 RREG32(mmUVD_VCPU_CACHE_SIZE0));
+	dev_info(adev->dev, "  UVD_VCPU_CACHE_OFFSET1=0x%08X\n",
+		 RREG32(mmUVD_VCPU_CACHE_OFFSET1));
+	dev_info(adev->dev, "  UVD_VCPU_CACHE_SIZE1=0x%08X\n",
+		 RREG32(mmUVD_VCPU_CACHE_SIZE1));
+	dev_info(adev->dev, "  UVD_VCPU_CACHE_OFFSET2=0x%08X\n",
+		 RREG32(mmUVD_VCPU_CACHE_OFFSET2));
+	dev_info(adev->dev, "  UVD_VCPU_CACHE_SIZE2=0x%08X\n",
+		 RREG32(mmUVD_VCPU_CACHE_SIZE2));
+	dev_info(adev->dev, "  UVD_VCPU_CNTL=0x%08X\n",
+		 RREG32(mmUVD_VCPU_CNTL));
+	dev_info(adev->dev, "  UVD_SOFT_RESET=0x%08X\n",
+		 RREG32(mmUVD_SOFT_RESET));
+	dev_info(adev->dev, "  UVD_RBC_IB_BASE=0x%08X\n",
+		 RREG32(mmUVD_RBC_IB_BASE));
+	dev_info(adev->dev, "  UVD_RBC_IB_SIZE=0x%08X\n",
+		 RREG32(mmUVD_RBC_IB_SIZE));
+	dev_info(adev->dev, "  UVD_RBC_RB_BASE=0x%08X\n",
+		 RREG32(mmUVD_RBC_RB_BASE));
+	dev_info(adev->dev, "  UVD_RBC_RB_RPTR=0x%08X\n",
+		 RREG32(mmUVD_RBC_RB_RPTR));
+	dev_info(adev->dev, "  UVD_RBC_RB_WPTR=0x%08X\n",
+		 RREG32(mmUVD_RBC_RB_WPTR));
+	dev_info(adev->dev, "  UVD_RBC_RB_WPTR_CNTL=0x%08X\n",
+		 RREG32(mmUVD_RBC_RB_WPTR_CNTL));
+	dev_info(adev->dev, "  UVD_RBC_RB_CNTL=0x%08X\n",
+		 RREG32(mmUVD_RBC_RB_CNTL));
+	dev_info(adev->dev, "  UVD_STATUS=0x%08X\n",
+		 RREG32(mmUVD_STATUS));
+	dev_info(adev->dev, "  UVD_SEMA_TIMEOUT_STATUS=0x%08X\n",
+		 RREG32(mmUVD_SEMA_TIMEOUT_STATUS));
+	dev_info(adev->dev, "  UVD_SEMA_WAIT_INCOMPLETE_TIMEOUT_CNTL=0x%08X\n",
+		 RREG32(mmUVD_SEMA_WAIT_INCOMPLETE_TIMEOUT_CNTL));
+	dev_info(adev->dev, "  UVD_SEMA_WAIT_FAULT_TIMEOUT_CNTL=0x%08X\n",
+		 RREG32(mmUVD_SEMA_WAIT_FAULT_TIMEOUT_CNTL));
+	dev_info(adev->dev, "  UVD_SEMA_SIGNAL_INCOMPLETE_TIMEOUT_CNTL=0x%08X\n",
+		 RREG32(mmUVD_SEMA_SIGNAL_INCOMPLETE_TIMEOUT_CNTL));
+	dev_info(adev->dev, "  UVD_CONTEXT_ID=0x%08X\n",
+		 RREG32(mmUVD_CONTEXT_ID));
+}
+
+static int uvd_v4_2_set_interrupt_state(struct amdgpu_device *adev,
+					struct amdgpu_irq_src *source,
+					unsigned type,
+					enum amdgpu_interrupt_state state)
+{
+	// TODO
+	return 0;
+}
+
+static int uvd_v4_2_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.ring);
+	return 0;
+}
+
+static int uvd_v4_2_set_clockgating_state(struct amdgpu_device *adev,
+					  enum amdgpu_clockgating_state state)
+{
+	bool gate = false;
+
+	if (state == AMDGPU_CG_STATE_GATE)
+		gate = true;
+
+	uvd_v4_2_enable_mgcg(adev, gate);
+
+	return 0;
+}
+
+static int uvd_v4_2_set_powergating_state(struct amdgpu_device *adev,
+					  enum amdgpu_powergating_state state)
+{
+	/* This doesn't actually powergate the UVD 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
+	 */
+	if (state == AMDGPU_PG_STATE_GATE) {
+		uvd_v4_2_stop(adev);
+		return 0;
+	} else {
+		return uvd_v4_2_start(adev);
+	}
+}
+
+const struct amdgpu_ip_funcs uvd_v4_2_ip_funcs = {
+	.early_init = uvd_v4_2_early_init,
+	.late_init = NULL,
+	.sw_init = uvd_v4_2_sw_init,
+	.sw_fini = uvd_v4_2_sw_fini,
+	.hw_init = uvd_v4_2_hw_init,
+	.hw_fini = uvd_v4_2_hw_fini,
+	.suspend = uvd_v4_2_suspend,
+	.resume = uvd_v4_2_resume,
+	.is_idle = uvd_v4_2_is_idle,
+	.wait_for_idle = uvd_v4_2_wait_for_idle,
+	.soft_reset = uvd_v4_2_soft_reset,
+	.print_status = uvd_v4_2_print_status,
+	.set_clockgating_state = uvd_v4_2_set_clockgating_state,
+	.set_powergating_state = uvd_v4_2_set_powergating_state,
+};
+
+static const struct amdgpu_ring_funcs uvd_v4_2_ring_funcs = {
+	.get_rptr = uvd_v4_2_ring_get_rptr,
+	.get_wptr = uvd_v4_2_ring_get_wptr,
+	.set_wptr = uvd_v4_2_ring_set_wptr,
+	.parse_cs = amdgpu_uvd_ring_parse_cs,
+	.emit_ib = uvd_v4_2_ring_emit_ib,
+	.emit_fence = uvd_v4_2_ring_emit_fence,
+	.emit_semaphore = uvd_v4_2_ring_emit_semaphore,
+	.test_ring = uvd_v4_2_ring_test_ring,
+	.test_ib = uvd_v4_2_ring_test_ib,
+	.is_lockup = amdgpu_ring_test_lockup,
+};
+
+static void uvd_v4_2_set_ring_funcs(struct amdgpu_device *adev)
+{
+	adev->uvd.ring.funcs = &uvd_v4_2_ring_funcs;
+}
+
+static const struct amdgpu_irq_src_funcs uvd_v4_2_irq_funcs = {
+	.set = uvd_v4_2_set_interrupt_state,
+	.process = uvd_v4_2_process_interrupt,
+};
+
+static void uvd_v4_2_set_irq_funcs(struct amdgpu_device *adev)
+{
+	adev->uvd.irq.num_types = 1;
+	adev->uvd.irq.funcs = &uvd_v4_2_irq_funcs;
+}