Merge tag 'drm-next-2019-09-18' of git://anongit.freedesktop.org/drm/drm

Pull drm updates from Dave Airlie:
 "This is the main pull request for 5.4-rc1 merge window. I don't think
  there is anything outstanding so next week should just be fixes, but
  we'll see if I missed anything. I landed some fixes earlier in the
  week but got delayed writing summary and sending it out, due to a mix
  of sick kid and jetlag!

  There are some fixes pending, but I'd rather get the main merge out of
  the way instead of delaying it longer.

  It's also pretty large in commit count and new amd header file size.
  The largest thing is four new amdgpu products (navi12/14, arcturus and
  renoir APU support).

  Otherwise it's pretty much lots of work across the board, i915 has
  started landing tigerlake support, lots of icelake fixes and lots of
  locking reworking for future gpu support, lots of header file rework
  (drmP.h is nearly gone), some old legacy hacks (DRM_WAIT_ON) have been
  put into the places they are needed.

  uapi:
   - content protection type property for HDCP

  core:
   - rework include dependencies
   - lots of drmP.h removals
   - link rate calculation robustness fix
   - make fb helper map only when required
   - add connector->DDC adapter link
   - DRM_WAIT_ON removed
   - drop DRM_AUTH usage from drivers

  dma-buf:
   - reservation object fence helper

  dma-fence:
   - shrink dma_fence struct
   - merge signal functions
   - store timestamps in dma_fence
   - selftests

  ttm:
   - embed drm_get_object struct into ttm_buffer_object
   - release_notify callback

  bridges:
   - sii902x - audio graph card support
   - tc358767 - aux data handling rework
   - ti-snd64dsi86 - debugfs support, DSI mode flags support

  panels:
   - Support for GiantPlus GPM940B0, Sharp LQ070Y3DG3B, Ortustech
     COM37H3M, Novatek NT39016, Sharp LS020B1DD01D, Raydium RM67191, Boe
     Himax8279d, Sharp LD-D5116Z01B
   - TI nspire, NEC NL8048HL11, LG Philips LB035Q02, Sharp LS037V7DW01,
     Sony ACX565AKM, Toppoly TD028TTEC1 Toppoly TD043MTEA1

  i915:
   - Initial tigerlake platform support
   - Locking simplification work, general all over refactoring.
   - Selftests
   - HDCP debug info improvements
   - DSI properties
   - Icelake display PLL fixes, colorspace fixes, bandwidth fixes, DSI
     suspend/resume
   - GuC fixes
   - Perf fixes
   - ElkhartLake enablement
   - DP MST fixes
   - GVT - command parser enhancements

  amdgpu:
   - add wipe memory on release flag for buffer creation
   - Navi12/14 support (may be marked experimental)
   - Arcturus support
   - Renoir APU support
   - mclk DPM for Navi
   - DC display fixes
   - Raven scatter/gather support
   - RAS support for GFX
   - Navi12 + Arcturus power features
   - GPU reset for Picasso
   - smu11 i2c controller support

  amdkfd:
   - navi12/14 support
   - Arcturus support

  radeon:
   - kexec fix

  nouveau:
   - improved display color management
   - detect lack of GPU power cables

  vmwgfx:
   - evicition priority support
   - remove unused security feature

  msm:
   - msm8998 display support
   - better async commit support for cursor updates

  etnaviv:
   - per-process address space support
   - performance counter fixes
   - softpin support

  mcde:
   - DCS transfers fix

  exynos:
   - drmP.h cleanup

  lima:
   - reduce logging

  kirin:
   - misc clenaups

  komeda:
   - dual-link support
   - DT memory regions

  hisilicon:
   - misc fixes

  imx:
   - IPUv3 image converter fixes
   - 32-bit RGB V4L2 pixel format support

  ingenic:
   - more support for panel related cases

  mgag200:
   - cursor support fix

  panfrost:
   - export GPU features register to userspace
   - gpu heap allocations
   - per-fd address space support

  pl111:
   - CLD pads wiring support removed from DT

  rockchip:
   - rework to use DRM PSR helpers
   - fix bug in VOP_WIN_GET macro
   - DSI DT binding rework

  sun4i:
   - improve support for color encoding and range
   - DDC enabled GPIO

  tinydrm:
   - rework SPI support
   - improve MIPI-DBI support
   - moved to drm/tiny

  vkms:
   - rework CRC tracking

  dw-hdmi:
   - get_eld and i2s improvements

  gm12u320:
   - misc fixes

  meson:
   - global code cleanup
   - vpu feature detect

  omap:
   - alpha/pixel blend mode properties

  rcar-du:
   - misc fixes"

* tag 'drm-next-2019-09-18' of git://anongit.freedesktop.org/drm/drm: (2112 commits)
  drm/nouveau/bar/gm20b: Avoid BAR1 teardown during init
  drm/nouveau: Fix ordering between TTM and GEM release
  drm/nouveau/prime: Extend DMA reservation object lock
  drm/nouveau: Fix fallout from reservation object rework
  drm/nouveau/kms/nv50-: Don't create MSTMs for eDP connectors
  drm/i915: Use NOEVICT for first pass on attemping to pin a GGTT mmap
  drm/i915: to make vgpu ppgtt notificaiton as atomic operation
  drm/i915: Flush the existing fence before GGTT read/write
  drm/i915: Hold irq-off for the entire fake lock period
  drm/i915/gvt: update RING_START reg of vGPU when the context is submitted to i915
  drm/i915/gvt: update vgpu workload head pointer correctly
  drm/mcde: Fix DSI transfers
  drm/msm: Use the correct dma_sync calls harder
  drm/msm: remove unlikely() from WARN_ON() conditions
  drm/msm/dsi: Fix return value check for clk_get_parent
  drm/msm: add atomic traces
  drm/msm/dpu: async commit support
  drm/msm: async commit support
  drm/msm: split power control from prepare/complete_commit
  drm/msm: add kms->flush_commit()
  ...

1 files changed, 724 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c b/drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c
new file mode 100644
index 000000000000..4a5951036927
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c
@@ -0,0 +1,724 @@
+/*
+ * Copyright 2019 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 "smuio/smuio_11_0_0_offset.h"
+#include "smuio/smuio_11_0_0_sh_mask.h"
+
+#include "smu_v11_0_i2c.h"
+#include "amdgpu.h"
+#include "soc15_common.h"
+#include <drm/drm_fixed.h>
+#include <drm/drm_drv.h>
+#include "amdgpu_amdkfd.h"
+#include <linux/i2c.h>
+#include <linux/pci.h>
+#include "amdgpu_ras.h"
+
+/* error codes */
+#define I2C_OK                0
+#define I2C_NAK_7B_ADDR_NOACK 1
+#define I2C_NAK_TXDATA_NOACK  2
+#define I2C_TIMEOUT           4
+#define I2C_SW_TIMEOUT        8
+#define I2C_ABORT             0x10
+
+/* I2C transaction flags */
+#define I2C_NO_STOP	1
+#define I2C_RESTART	2
+
+#define to_amdgpu_device(x) (container_of(x, struct amdgpu_ras, eeprom_control.eeprom_accessor))->adev
+#define to_eeprom_control(x) container_of(x, struct amdgpu_ras_eeprom_control, eeprom_accessor)
+
+static void smu_v11_0_i2c_set_clock_gating(struct i2c_adapter *control, bool en)
+{
+	struct amdgpu_device *adev = to_amdgpu_device(control);
+	uint32_t reg = RREG32_SOC15(SMUIO, 0, mmSMUIO_PWRMGT);
+
+	reg = REG_SET_FIELD(reg, SMUIO_PWRMGT, i2c_clk_gate_en, en ? 1 : 0);
+	WREG32_SOC15(SMUIO, 0, mmSMUIO_PWRMGT, reg);
+}
+
+
+static void smu_v11_0_i2c_enable(struct i2c_adapter *control, bool enable)
+{
+	struct amdgpu_device *adev = to_amdgpu_device(control);
+
+	WREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_ENABLE, enable ? 1 : 0);
+}
+
+static void smu_v11_0_i2c_clear_status(struct i2c_adapter *control)
+{
+	struct amdgpu_device *adev = to_amdgpu_device(control);
+	/* do */
+	{
+		RREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_CLR_INTR);
+
+	} /* while (reg_CKSVII2C_ic_clr_intr == 0) */
+}
+
+static void smu_v11_0_i2c_configure(struct i2c_adapter *control)
+{
+	struct amdgpu_device *adev = to_amdgpu_device(control);
+	uint32_t reg = 0;
+
+	reg = REG_SET_FIELD(reg, CKSVII2C_IC_CON, IC_SLAVE_DISABLE, 1);
+	reg = REG_SET_FIELD(reg, CKSVII2C_IC_CON, IC_RESTART_EN, 1);
+	reg = REG_SET_FIELD(reg, CKSVII2C_IC_CON, IC_10BITADDR_MASTER, 0);
+	reg = REG_SET_FIELD(reg, CKSVII2C_IC_CON, IC_10BITADDR_SLAVE, 0);
+	/* Standard mode */
+	reg = REG_SET_FIELD(reg, CKSVII2C_IC_CON, IC_MAX_SPEED_MODE, 2);
+	reg = REG_SET_FIELD(reg, CKSVII2C_IC_CON, IC_MASTER_MODE, 1);
+
+	WREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_CON, reg);
+}
+
+static void smu_v11_0_i2c_set_clock(struct i2c_adapter *control)
+{
+	struct amdgpu_device *adev = to_amdgpu_device(control);
+
+	/*
+	 * Standard mode speed, These values are taken from SMUIO MAS,
+	 * but are different from what is given is
+	 * Synopsys spec. The values here are based on assumption
+	 * that refclock is 100MHz
+	 *
+	 * Configuration for standard mode; Speed = 100kbps
+	 * Scale linearly, for now only support standard speed clock
+	 * This will work only with 100M ref clock
+	 *
+	 * TBD:Change the calculation to take into account ref clock values also.
+	 */
+
+	WREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_FS_SPKLEN, 2);
+	WREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_SS_SCL_HCNT, 120);
+	WREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_SS_SCL_LCNT, 130);
+	WREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_SDA_HOLD, 20);
+}
+
+static void smu_v11_0_i2c_set_address(struct i2c_adapter *control, uint8_t address)
+{
+	struct amdgpu_device *adev = to_amdgpu_device(control);
+
+	/* Convert fromr 8-bit to 7-bit address */
+	address >>= 1;
+	WREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_TAR, (address & 0xFF));
+}
+
+static uint32_t smu_v11_0_i2c_poll_tx_status(struct i2c_adapter *control)
+{
+	struct amdgpu_device *adev = to_amdgpu_device(control);
+	uint32_t ret = I2C_OK;
+	uint32_t reg, reg_c_tx_abrt_source;
+
+	/*Check if transmission is completed */
+	unsigned long  timeout_counter = jiffies + msecs_to_jiffies(20);
+
+	do {
+		if (time_after(jiffies, timeout_counter)) {
+			ret |= I2C_SW_TIMEOUT;
+			break;
+		}
+
+		reg = RREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_STATUS);
+
+	} while (REG_GET_FIELD(reg, CKSVII2C_IC_STATUS, TFE) == 0);
+
+	if (ret != I2C_OK)
+		return ret;
+
+	/* This only checks if NAK is received and transaction got aborted */
+	reg = RREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_INTR_STAT);
+
+	if (REG_GET_FIELD(reg, CKSVII2C_IC_INTR_STAT, R_TX_ABRT) == 1) {
+		reg_c_tx_abrt_source = RREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_TX_ABRT_SOURCE);
+		DRM_INFO("TX was terminated, IC_TX_ABRT_SOURCE val is:%x", reg_c_tx_abrt_source);
+
+		/* Check for stop due to NACK */
+		if (REG_GET_FIELD(reg_c_tx_abrt_source,
+				  CKSVII2C_IC_TX_ABRT_SOURCE,
+				  ABRT_TXDATA_NOACK) == 1) {
+
+			ret |= I2C_NAK_TXDATA_NOACK;
+
+		} else if (REG_GET_FIELD(reg_c_tx_abrt_source,
+					 CKSVII2C_IC_TX_ABRT_SOURCE,
+					 ABRT_7B_ADDR_NOACK) == 1) {
+
+			ret |= I2C_NAK_7B_ADDR_NOACK;
+		} else {
+			ret |= I2C_ABORT;
+		}
+
+		smu_v11_0_i2c_clear_status(control);
+	}
+
+	return ret;
+}
+
+static uint32_t smu_v11_0_i2c_poll_rx_status(struct i2c_adapter *control)
+{
+	struct amdgpu_device *adev = to_amdgpu_device(control);
+	uint32_t ret = I2C_OK;
+	uint32_t reg_ic_status, reg_c_tx_abrt_source;
+
+	reg_c_tx_abrt_source = RREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_TX_ABRT_SOURCE);
+
+	/* If slave is not present */
+	if (REG_GET_FIELD(reg_c_tx_abrt_source,
+			  CKSVII2C_IC_TX_ABRT_SOURCE,
+			  ABRT_7B_ADDR_NOACK) == 1) {
+		ret |= I2C_NAK_7B_ADDR_NOACK;
+
+		smu_v11_0_i2c_clear_status(control);
+	} else {  /* wait till some data is there in RXFIFO */
+		/* Poll for some byte in RXFIFO */
+		unsigned long  timeout_counter = jiffies + msecs_to_jiffies(20);
+
+		do {
+			if (time_after(jiffies, timeout_counter)) {
+				ret |= I2C_SW_TIMEOUT;
+				break;
+			}
+
+			reg_ic_status = RREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_STATUS);
+
+		} while (REG_GET_FIELD(reg_ic_status, CKSVII2C_IC_STATUS, RFNE) == 0);
+	}
+
+	return ret;
+}
+
+
+
+
+/**
+ * smu_v11_0_i2c_transmit - Send a block of data over the I2C bus to a slave device.
+ *
+ * @address: The I2C address of the slave device.
+ * @data: The data to transmit over the bus.
+ * @numbytes: The amount of data to transmit.
+ * @i2c_flag: Flags for transmission
+ *
+ * Returns 0 on success or error.
+ */
+static uint32_t smu_v11_0_i2c_transmit(struct i2c_adapter *control,
+				  uint8_t address, uint8_t *data,
+				  uint32_t numbytes, uint32_t i2c_flag)
+{
+	struct amdgpu_device *adev = to_amdgpu_device(control);
+	uint32_t bytes_sent, reg, ret = 0;
+	unsigned long  timeout_counter;
+
+	bytes_sent = 0;
+
+	DRM_DEBUG_DRIVER("I2C_Transmit(), address = %x, bytes = %d , data: ",
+		 (uint16_t)address, numbytes);
+
+	if (drm_debug & DRM_UT_DRIVER) {
+		print_hex_dump(KERN_INFO, "data: ", DUMP_PREFIX_NONE,
+			       16, 1, data, numbytes, false);
+	}
+
+	/* Set the I2C slave address */
+	smu_v11_0_i2c_set_address(control, address);
+	/* Enable I2C */
+	smu_v11_0_i2c_enable(control, true);
+
+	/* Clear status bits */
+	smu_v11_0_i2c_clear_status(control);
+
+
+	timeout_counter = jiffies + msecs_to_jiffies(20);
+
+	while (numbytes > 0) {
+		reg = RREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_STATUS);
+		if (REG_GET_FIELD(reg, CKSVII2C_IC_STATUS, TFNF)) {
+			do {
+				reg = 0;
+				/*
+				 * Prepare transaction, no need to set RESTART. I2C engine will send
+				 * START as soon as it sees data in TXFIFO
+				 */
+				if (bytes_sent == 0)
+					reg = REG_SET_FIELD(reg, CKSVII2C_IC_DATA_CMD, RESTART,
+							    (i2c_flag & I2C_RESTART) ? 1 : 0);
+				reg = REG_SET_FIELD(reg, CKSVII2C_IC_DATA_CMD, DAT, data[bytes_sent]);
+
+				/* determine if we need to send STOP bit or not */
+				if (numbytes == 1)
+					/* Final transaction, so send stop unless I2C_NO_STOP */
+					reg = REG_SET_FIELD(reg, CKSVII2C_IC_DATA_CMD, STOP,
+							    (i2c_flag & I2C_NO_STOP) ? 0 : 1);
+				/* Write */
+				reg = REG_SET_FIELD(reg, CKSVII2C_IC_DATA_CMD, CMD, 0);
+				WREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_DATA_CMD, reg);
+
+				/* Record that the bytes were transmitted */
+				bytes_sent++;
+				numbytes--;
+
+				reg = RREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_STATUS);
+
+			} while (numbytes &&  REG_GET_FIELD(reg, CKSVII2C_IC_STATUS, TFNF));
+		}
+
+		/*
+		 * We waited too long for the transmission FIFO to become not-full.
+		 * Exit the loop with error.
+		 */
+		if (time_after(jiffies, timeout_counter)) {
+			ret |= I2C_SW_TIMEOUT;
+			goto Err;
+		}
+	}
+
+	ret = smu_v11_0_i2c_poll_tx_status(control);
+
+Err:
+	/* Any error, no point in proceeding */
+	if (ret != I2C_OK) {
+		if (ret & I2C_SW_TIMEOUT)
+			DRM_ERROR("TIMEOUT ERROR !!!");
+
+		if (ret & I2C_NAK_7B_ADDR_NOACK)
+			DRM_ERROR("Received I2C_NAK_7B_ADDR_NOACK !!!");
+
+
+		if (ret & I2C_NAK_TXDATA_NOACK)
+			DRM_ERROR("Received I2C_NAK_TXDATA_NOACK !!!");
+	}
+
+	return ret;
+}
+
+
+/**
+ * smu_v11_0_i2c_receive - Receive a block of data over the I2C bus from a slave device.
+ *
+ * @address: The I2C address of the slave device.
+ * @numbytes: The amount of data to transmit.
+ * @i2c_flag: Flags for transmission
+ *
+ * Returns 0 on success or error.
+ */
+static uint32_t smu_v11_0_i2c_receive(struct i2c_adapter *control,
+				 uint8_t address, uint8_t *data,
+				 uint32_t numbytes, uint8_t i2c_flag)
+{
+	struct amdgpu_device *adev = to_amdgpu_device(control);
+	uint32_t bytes_received, ret = I2C_OK;
+
+	bytes_received = 0;
+
+	/* Set the I2C slave address */
+	smu_v11_0_i2c_set_address(control, address);
+
+	/* Enable I2C */
+	smu_v11_0_i2c_enable(control, true);
+
+	while (numbytes > 0) {
+		uint32_t reg = 0;
+
+		smu_v11_0_i2c_clear_status(control);
+
+
+		/* Prepare transaction */
+
+		/* Each time we disable I2C, so this is not a restart */
+		if (bytes_received == 0)
+			reg = REG_SET_FIELD(reg, CKSVII2C_IC_DATA_CMD, RESTART,
+					    (i2c_flag & I2C_RESTART) ? 1 : 0);
+
+		reg = REG_SET_FIELD(reg, CKSVII2C_IC_DATA_CMD, DAT, 0);
+		/* Read */
+		reg = REG_SET_FIELD(reg, CKSVII2C_IC_DATA_CMD, CMD, 1);
+
+		/* Transmitting last byte */
+		if (numbytes == 1)
+			/* Final transaction, so send stop if requested */
+			reg = REG_SET_FIELD(reg, CKSVII2C_IC_DATA_CMD, STOP,
+					    (i2c_flag & I2C_NO_STOP) ? 0 : 1);
+
+		WREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_DATA_CMD, reg);
+
+		ret = smu_v11_0_i2c_poll_rx_status(control);
+
+		/* Any error, no point in proceeding */
+		if (ret != I2C_OK) {
+			if (ret & I2C_SW_TIMEOUT)
+				DRM_ERROR("TIMEOUT ERROR !!!");
+
+			if (ret & I2C_NAK_7B_ADDR_NOACK)
+				DRM_ERROR("Received I2C_NAK_7B_ADDR_NOACK !!!");
+
+			if (ret & I2C_NAK_TXDATA_NOACK)
+				DRM_ERROR("Received I2C_NAK_TXDATA_NOACK !!!");
+
+			break;
+		}
+
+		reg = RREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_DATA_CMD);
+		data[bytes_received] = REG_GET_FIELD(reg, CKSVII2C_IC_DATA_CMD, DAT);
+
+		/* Record that the bytes were received */
+		bytes_received++;
+		numbytes--;
+	}
+
+	DRM_DEBUG_DRIVER("I2C_Receive(), address = %x, bytes = %d, data :",
+		  (uint16_t)address, bytes_received);
+
+	if (drm_debug & DRM_UT_DRIVER) {
+		print_hex_dump(KERN_INFO, "data: ", DUMP_PREFIX_NONE,
+			       16, 1, data, bytes_received, false);
+	}
+
+	return ret;
+}
+
+static void smu_v11_0_i2c_abort(struct i2c_adapter *control)
+{
+	struct amdgpu_device *adev = to_amdgpu_device(control);
+	uint32_t reg = 0;
+
+	/* Enable I2C engine; */
+	reg = REG_SET_FIELD(reg, CKSVII2C_IC_ENABLE, ENABLE, 1);
+	WREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_ENABLE, reg);
+
+	/* Abort previous transaction */
+	reg = REG_SET_FIELD(reg, CKSVII2C_IC_ENABLE, ABORT, 1);
+	WREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_ENABLE, reg);
+
+	DRM_DEBUG_DRIVER("I2C_Abort() Done.");
+}
+
+
+static bool smu_v11_0_i2c_activity_done(struct i2c_adapter *control)
+{
+	struct amdgpu_device *adev = to_amdgpu_device(control);
+
+	const uint32_t IDLE_TIMEOUT = 1024;
+	uint32_t timeout_count = 0;
+	uint32_t reg_ic_enable, reg_ic_enable_status, reg_ic_clr_activity;
+
+	reg_ic_enable_status = RREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_ENABLE_STATUS);
+	reg_ic_enable = RREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_ENABLE);
+
+
+	if ((REG_GET_FIELD(reg_ic_enable, CKSVII2C_IC_ENABLE, ENABLE) == 0) &&
+	    (REG_GET_FIELD(reg_ic_enable_status, CKSVII2C_IC_ENABLE_STATUS, IC_EN) == 1)) {
+		/*
+		 * Nobody is using I2C engine, but engine remains active because
+		 * someone missed to send STOP
+		 */
+		smu_v11_0_i2c_abort(control);
+	} else if (REG_GET_FIELD(reg_ic_enable, CKSVII2C_IC_ENABLE, ENABLE) == 0) {
+		/* Nobody is using I2C engine */
+		return true;
+	}
+
+	/* Keep reading activity bit until it's cleared */
+	do {
+		reg_ic_clr_activity = RREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_CLR_ACTIVITY);
+
+		if (REG_GET_FIELD(reg_ic_clr_activity,
+		    CKSVII2C_IC_CLR_ACTIVITY, CLR_ACTIVITY) == 0)
+			return true;
+
+		++timeout_count;
+
+	} while (timeout_count < IDLE_TIMEOUT);
+
+	return false;
+}
+
+static void smu_v11_0_i2c_init(struct i2c_adapter *control)
+{
+	/* Disable clock gating */
+	smu_v11_0_i2c_set_clock_gating(control, false);
+
+	if (!smu_v11_0_i2c_activity_done(control))
+		DRM_WARN("I2C busy !");
+
+	/* Disable I2C */
+	smu_v11_0_i2c_enable(control, false);
+
+	/* Configure I2C to operate as master and in standard mode */
+	smu_v11_0_i2c_configure(control);
+
+	/* Initialize the clock to 50 kHz default */
+	smu_v11_0_i2c_set_clock(control);
+
+}
+
+static void smu_v11_0_i2c_fini(struct i2c_adapter *control)
+{
+	struct amdgpu_device *adev = to_amdgpu_device(control);
+	uint32_t reg_ic_enable_status, reg_ic_enable;
+
+	smu_v11_0_i2c_enable(control, false);
+
+	/* Double check if disabled, else force abort */
+	reg_ic_enable_status = RREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_ENABLE_STATUS);
+	reg_ic_enable = RREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_ENABLE);
+
+	if ((REG_GET_FIELD(reg_ic_enable, CKSVII2C_IC_ENABLE, ENABLE) == 0) &&
+	    (REG_GET_FIELD(reg_ic_enable_status,
+			   CKSVII2C_IC_ENABLE_STATUS, IC_EN) == 1)) {
+		/*
+		 * Nobody is using I2C engine, but engine remains active because
+		 * someone missed to send STOP
+		 */
+		smu_v11_0_i2c_abort(control);
+	}
+
+	/* Restore clock gating */
+	smu_v11_0_i2c_set_clock_gating(control, true);
+
+}
+
+static bool smu_v11_0_i2c_bus_lock(struct i2c_adapter *control)
+{
+	struct amdgpu_device *adev = to_amdgpu_device(control);
+
+	/* Send  PPSMC_MSG_RequestI2CBus */
+	if (!adev->powerplay.pp_funcs->smu_i2c_bus_access)
+		goto Fail;
+
+
+	if (!adev->powerplay.pp_funcs->smu_i2c_bus_access(adev->powerplay.pp_handle, true))
+		return true;
+
+Fail:
+	return false;
+}
+
+static bool smu_v11_0_i2c_bus_unlock(struct i2c_adapter *control)
+{
+	struct amdgpu_device *adev = to_amdgpu_device(control);
+
+	/* Send  PPSMC_MSG_RequestI2CBus */
+	if (!adev->powerplay.pp_funcs->smu_i2c_bus_access)
+		goto Fail;
+
+	/* Send  PPSMC_MSG_ReleaseI2CBus */
+	if (!adev->powerplay.pp_funcs->smu_i2c_bus_access(adev->powerplay.pp_handle,
+							     false))
+		return true;
+
+Fail:
+	return false;
+}
+
+/***************************** EEPROM I2C GLUE ****************************/
+
+static uint32_t smu_v11_0_i2c_eeprom_read_data(struct i2c_adapter *control,
+					       uint8_t address,
+					       uint8_t *data,
+					       uint32_t numbytes)
+{
+	uint32_t  ret = 0;
+
+	/* First 2 bytes are dummy write to set EEPROM address */
+	ret = smu_v11_0_i2c_transmit(control, address, data, 2, I2C_NO_STOP);
+	if (ret != I2C_OK)
+		goto Fail;
+
+	/* Now read data starting with that address */
+	ret = smu_v11_0_i2c_receive(control, address, data + 2, numbytes - 2,
+				    I2C_RESTART);
+
+Fail:
+	if (ret != I2C_OK)
+		DRM_ERROR("ReadData() - I2C error occurred :%x", ret);
+
+	return ret;
+}
+
+static uint32_t smu_v11_0_i2c_eeprom_write_data(struct i2c_adapter *control,
+						uint8_t address,
+						uint8_t *data,
+						uint32_t numbytes)
+{
+	uint32_t  ret;
+
+	ret = smu_v11_0_i2c_transmit(control, address, data, numbytes, 0);
+
+	if (ret != I2C_OK)
+		DRM_ERROR("WriteI2CData() - I2C error occurred :%x", ret);
+	else
+		/*
+		 * According to EEPROM spec there is a MAX of 10 ms required for
+		 * EEPROM to flush internal RX buffer after STOP was issued at the
+		 * end of write transaction. During this time the EEPROM will not be
+		 * responsive to any more commands - so wait a bit more.
+		 *
+		 * TODO Improve to wait for first ACK for slave address after
+		 * internal write cycle done.
+		 */
+		msleep(10);
+
+	return ret;
+
+}
+
+static void lock_bus(struct i2c_adapter *i2c, unsigned int flags)
+{
+	struct amdgpu_ras_eeprom_control *control = to_eeprom_control(i2c);
+
+	if (!smu_v11_0_i2c_bus_lock(i2c)) {
+		DRM_ERROR("Failed to lock the bus from SMU");
+		return;
+	}
+
+	control->bus_locked = true;
+}
+
+static int trylock_bus(struct i2c_adapter *i2c, unsigned int flags)
+{
+	WARN_ONCE(1, "This operation not supposed to run in atomic context!");
+	return false;
+}
+
+static void unlock_bus(struct i2c_adapter *i2c, unsigned int flags)
+{
+	struct amdgpu_ras_eeprom_control *control = to_eeprom_control(i2c);
+
+	if (!smu_v11_0_i2c_bus_unlock(i2c)) {
+		DRM_ERROR("Failed to unlock the bus from SMU");
+		return;
+	}
+
+	control->bus_locked = false;
+}
+
+static const struct i2c_lock_operations smu_v11_0_i2c_i2c_lock_ops = {
+	.lock_bus = lock_bus,
+	.trylock_bus = trylock_bus,
+	.unlock_bus = unlock_bus,
+};
+
+static int smu_v11_0_i2c_eeprom_i2c_xfer(struct i2c_adapter *i2c_adap,
+			      struct i2c_msg *msgs, int num)
+{
+	int i, ret;
+	struct amdgpu_ras_eeprom_control *control = to_eeprom_control(i2c_adap);
+
+	if (!control->bus_locked) {
+		DRM_ERROR("I2C bus unlocked, stopping transaction!");
+		return -EIO;
+	}
+
+	smu_v11_0_i2c_init(i2c_adap);
+
+	for (i = 0; i < num; i++) {
+		if (msgs[i].flags & I2C_M_RD)
+			ret = smu_v11_0_i2c_eeprom_read_data(i2c_adap,
+							(uint8_t)msgs[i].addr,
+							msgs[i].buf, msgs[i].len);
+		else
+			ret = smu_v11_0_i2c_eeprom_write_data(i2c_adap,
+							 (uint8_t)msgs[i].addr,
+							 msgs[i].buf, msgs[i].len);
+
+		if (ret != I2C_OK) {
+			num = -EIO;
+			break;
+		}
+	}
+
+	smu_v11_0_i2c_fini(i2c_adap);
+	return num;
+}
+
+static u32 smu_v11_0_i2c_eeprom_i2c_func(struct i2c_adapter *adap)
+{
+	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+}
+
+
+static const struct i2c_algorithm smu_v11_0_i2c_eeprom_i2c_algo = {
+	.master_xfer = smu_v11_0_i2c_eeprom_i2c_xfer,
+	.functionality = smu_v11_0_i2c_eeprom_i2c_func,
+};
+
+int smu_v11_0_i2c_eeprom_control_init(struct i2c_adapter *control)
+{
+	struct amdgpu_device *adev = to_amdgpu_device(control);
+	int res;
+
+	control->owner = THIS_MODULE;
+	control->class = I2C_CLASS_SPD;
+	control->dev.parent = &adev->pdev->dev;
+	control->algo = &smu_v11_0_i2c_eeprom_i2c_algo;
+	snprintf(control->name, sizeof(control->name), "RAS EEPROM");
+	control->lock_ops = &smu_v11_0_i2c_i2c_lock_ops;
+
+	res = i2c_add_adapter(control);
+	if (res)
+		DRM_ERROR("Failed to register hw i2c, err: %d\n", res);
+
+	return res;
+}
+
+void smu_v11_0_i2c_eeprom_control_fini(struct i2c_adapter *control)
+{
+	i2c_del_adapter(control);
+}
+
+/*
+ * Keep this for future unit test if bugs arise
+ */
+#if 0
+#define I2C_TARGET_ADDR 0xA0
+
+bool smu_v11_0_i2c_test_bus(struct i2c_adapter *control)
+{
+
+	uint32_t ret = I2C_OK;
+	uint8_t data[6] = {0xf, 0, 0xde, 0xad, 0xbe, 0xef};
+
+
+	DRM_INFO("Begin");
+
+	if (!smu_v11_0_i2c_bus_lock(control)) {
+		DRM_ERROR("Failed to lock the bus!.");
+		return false;
+	}
+
+	smu_v11_0_i2c_init(control);
+
+	/* Write 0xde to address 0x0000 on the EEPROM */
+	ret = smu_v11_0_i2c_eeprom_write_data(control, I2C_TARGET_ADDR, data, 6);
+
+	ret = smu_v11_0_i2c_eeprom_read_data(control, I2C_TARGET_ADDR, data, 6);
+
+	smu_v11_0_i2c_fini(control);
+
+	smu_v11_0_i2c_bus_unlock(control);
+
+
+	DRM_INFO("End");
+	return true;
+}
+#endif