Merge tag 'drm-for-v4.15' of git://people.freedesktop.org/~airlied/linux

Pull drm updates from Dave Airlie:
 "This is the main drm pull request for v4.15.

  Core:
   - Atomic object lifetime fixes
   - Atomic iterator improvements
   - Sparse/smatch fixes
   - Legacy kms ioctls to be interruptible
   - EDID override improvements
   - fb/gem helper cleanups
   - Simple outreachy patches
   - Documentation improvements
   - Fix dma-buf rcu races
   - DRM mode object leasing for improving VR use cases.
   - vgaarb improvements for non-x86 platforms.

  New driver:
   - tve200: Faraday Technology TVE200 block.

     This "TV Encoder" encodes a ITU-T BT.656 stream and can be found in
     the StorLink SL3516 (later Cortina Systems CS3516) as well as the
     Grain Media GM8180.

  New bridges:
   - SiI9234 support

  New panels:
   - S6E63J0X03, OTM8009A, Seiko 43WVF1G, 7" rpi touch panel, Toshiba
     LT089AC19000, Innolux AT043TN24

  i915:
   - Remove Coffeelake from alpha support
   - Cannonlake workarounds
   - Infoframe refactoring for DisplayPort
   - VBT updates
   - DisplayPort vswing/emph/buffer translation refactoring
   - CCS fixes
   - Restore GPU clock boost on missed vblanks
   - Scatter list updates for userptr allocations
   - Gen9+ transition watermarks
   - Display IPC (Isochronous Priority Control)
   - Private PAT management
   - GVT: improved error handling and pci config sanitizing
   - Execlist refactoring
   - Transparent Huge Page support
   - User defined priorities support
   - HuC/GuC firmware refactoring
   - DP MST fixes
   - eDP power sequencing fixes
   - Use RCU instead of stop_machine
   - PSR state tracking support
   - Eviction fixes
   - BDW DP aux channel timeout fixes
   - LSPCON fixes
   - Cannonlake PLL fixes

  amdgpu:
   - Per VM BO support
   - Powerplay cleanups
   - CI powerplay support
   - PASID mgr for kfd
   - SR-IOV fixes
   - initial GPU reset for vega10
   - Prime mmap support
   - TTM updates
   - Clock query interface for Raven
   - Fence to handle ioctl
   - UVD encode ring support on Polaris
   - Transparent huge page DMA support
   - Compute LRU pipe tweaks
   - BO flag to allow buffers to opt out of implicit sync
   - CTX priority setting API
   - VRAM lost infrastructure plumbing

  qxl:
   - fix flicker since atomic rework

  amdkfd:
   - Further improvements from internal AMD tree
   - Usermode events
   - Drop radeon support

  nouveau:
   - Pascal temperature sensor support
   - Improved BAR2 handling
   - MMU rework to support Pascal MMU

  exynos:
   - Improved HDMI/mixer support
   - HDMI audio interface support

  tegra:
   - Prep work for tegra186
   - Cleanup/fixes

  msm:
   - Preemption support for a5xx
   - Display fixes for 8x96 (snapdragon 820)
   - Async cursor plane fixes
   - FW loading rework
   - GPU debugging improvements

  vc4:
   - Prep for DSI panels
   - fix T-format tiling scanout
   - New madvise ioctl

  Rockchip:
   - LVDS support

  omapdrm:
   - omap4 HDMI CEC support

  etnaviv:
   - GPU performance counters groundwork

  sun4i:
   - refactor driver load + TCON backend
   - HDMI improvements
   - A31 support
   - Misc fixes

  udl:
   - Probe/EDID read fixes.

  tilcdc:
   - Misc fixes.

  pl111:
   - Support more variants

  adv7511:
   - Improve EDID handling.
   - HDMI CEC support

  sii8620:
   - Add remote control support"

* tag 'drm-for-v4.15' of git://people.freedesktop.org/~airlied/linux: (1480 commits)
  drm/rockchip: analogix_dp: Use mutex rather than spinlock
  drm/mode_object: fix documentation for object lookups.
  drm/i915: Reorder context-close to avoid calling i915_vma_close() under RCU
  drm/i915: Move init_clock_gating() back to where it was
  drm/i915: Prune the reservation shared fence array
  drm/i915: Idle the GPU before shinking everything
  drm/i915: Lock llist_del_first() vs llist_del_all()
  drm/i915: Calculate ironlake intermediate watermarks correctly, v2.
  drm/i915: Disable lazy PPGTT page table optimization for vGPU
  drm/i915/execlists: Remove the priority "optimisation"
  drm/i915: Filter out spurious execlists context-switch interrupts
  drm/amdgpu: use irq-safe lock for kiq->ring_lock
  drm/amdgpu: bypass lru touch for KIQ ring submission
  drm/amdgpu: Potential uninitialized variable in amdgpu_vm_update_directories()
  drm/amdgpu: potential uninitialized variable in amdgpu_vce_ring_parse_cs()
  drm/amd/powerplay: initialize a variable before using it
  drm/amd/powerplay: suppress KASAN out of bounds warning in vega10_populate_all_memory_levels
  drm/amd/amdgpu: fix evicted VRAM bo adjudgement condition
  drm/vblank: Tune drm_crtc_accurate_vblank_count() WARN down to a debug
  drm/rockchip: add CONFIG_OF dependency for lvds
  ...

13 files changed, 1663 insertions, 127 deletions

diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index adf9ae0e0b7c..3b99d5a06c16 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -71,7 +71,7 @@ config DRM_PARADE_PS8622
 
 config DRM_SIL_SII8620
 	tristate "Silicon Image SII8620 HDMI/MHL bridge"
-	depends on OF
+	depends on OF && RC_CORE
 	select DRM_KMS_HELPER
 	help
 	  Silicon Image SII8620 HDMI/MHL bridge chip driver.
@@ -84,6 +84,14 @@ config DRM_SII902X
 	---help---
 	  Silicon Image sii902x bridge chip driver.
 
+config DRM_SII9234
+	tristate "Silicon Image SII9234 HDMI/MHL bridge"
+	depends on OF
+	---help---
+	  Say Y here if you want support for the MHL interface.
+	  It is an I2C driver, that detects connection of MHL bridge
+	  and starts encapsulation of HDMI signal.
+
 config DRM_TOSHIBA_TC358767
 	tristate "Toshiba TC358767 eDP bridge"
 	depends on OF
diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
index 60dab87e4783..373eb28f31ed 100644
--- a/drivers/gpu/drm/bridge/Makefile
+++ b/drivers/gpu/drm/bridge/Makefile
@@ -7,6 +7,7 @@ obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o
 obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o
 obj-$(CONFIG_DRM_SIL_SII8620) += sil-sii8620.o
 obj-$(CONFIG_DRM_SII902X) += sii902x.o
+obj-$(CONFIG_DRM_SII9234) += sii9234.o
 obj-$(CONFIG_DRM_TOSHIBA_TC358767) += tc358767.o
 obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix/
 obj-$(CONFIG_DRM_I2C_ADV7511) += adv7511/
diff --git a/drivers/gpu/drm/bridge/adv7511/Kconfig b/drivers/gpu/drm/bridge/adv7511/Kconfig
index 2fed567f9943..592b9d2ec034 100644
--- a/drivers/gpu/drm/bridge/adv7511/Kconfig
+++ b/drivers/gpu/drm/bridge/adv7511/Kconfig
@@ -21,3 +21,11 @@ config DRM_I2C_ADV7533
 	default y
 	help
 	  Support for the Analog Devices ADV7533 DSI to HDMI encoder.
+
+config DRM_I2C_ADV7511_CEC
+	bool "ADV7511/33 HDMI CEC driver"
+	depends on DRM_I2C_ADV7511
+	select CEC_CORE
+	default y
+	help
+	  When selected the HDMI transmitter will support the CEC feature.
diff --git a/drivers/gpu/drm/bridge/adv7511/Makefile b/drivers/gpu/drm/bridge/adv7511/Makefile
index 5ba675534f6e..5bb384938a71 100644
--- a/drivers/gpu/drm/bridge/adv7511/Makefile
+++ b/drivers/gpu/drm/bridge/adv7511/Makefile
@@ -1,4 +1,5 @@
 adv7511-y := adv7511_drv.o
 adv7511-$(CONFIG_DRM_I2C_ADV7511_AUDIO) += adv7511_audio.o
+adv7511-$(CONFIG_DRM_I2C_ADV7511_CEC) += adv7511_cec.o
 adv7511-$(CONFIG_DRM_I2C_ADV7533) += adv7533.o
 obj-$(CONFIG_DRM_I2C_ADV7511) += adv7511.o
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511.h b/drivers/gpu/drm/bridge/adv7511/adv7511.h
index fe18a5d2d84b..b4efcbabf7f7 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511.h
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511.h
@@ -195,6 +195,25 @@
 #define ADV7511_PACKET_GM(x)	    ADV7511_PACKET(5, x)
 #define ADV7511_PACKET_SPARE(x)	    ADV7511_PACKET(6, x)
 
+#define ADV7511_REG_CEC_TX_FRAME_HDR	0x00
+#define ADV7511_REG_CEC_TX_FRAME_DATA0	0x01
+#define ADV7511_REG_CEC_TX_FRAME_LEN	0x10
+#define ADV7511_REG_CEC_TX_ENABLE	0x11
+#define ADV7511_REG_CEC_TX_RETRY	0x12
+#define ADV7511_REG_CEC_TX_LOW_DRV_CNT	0x14
+#define ADV7511_REG_CEC_RX_FRAME_HDR	0x15
+#define ADV7511_REG_CEC_RX_FRAME_DATA0	0x16
+#define ADV7511_REG_CEC_RX_FRAME_LEN	0x25
+#define ADV7511_REG_CEC_RX_ENABLE	0x26
+#define ADV7511_REG_CEC_RX_BUFFERS	0x4a
+#define ADV7511_REG_CEC_LOG_ADDR_MASK	0x4b
+#define ADV7511_REG_CEC_LOG_ADDR_0_1	0x4c
+#define ADV7511_REG_CEC_LOG_ADDR_2	0x4d
+#define ADV7511_REG_CEC_CLK_DIV		0x4e
+#define ADV7511_REG_CEC_SOFT_RESET	0x50
+
+#define ADV7533_REG_CEC_OFFSET		0x70
+
 enum adv7511_input_clock {
 	ADV7511_INPUT_CLOCK_1X,
 	ADV7511_INPUT_CLOCK_2X,
@@ -297,6 +316,8 @@ enum adv7511_type {
 	ADV7533,
 };
 
+#define ADV7511_MAX_ADDRS 3
+
 struct adv7511 {
 	struct i2c_client *i2c_main;
 	struct i2c_client *i2c_edid;
@@ -328,8 +349,6 @@ struct adv7511 {
 	enum adv7511_sync_polarity hsync_polarity;
 	bool rgb;
 
-	struct edid *edid;
-
 	struct gpio_desc *gpio_pd;
 
 	struct regulator_bulk_data *supplies;
@@ -343,15 +362,27 @@ struct adv7511 {
 
 	enum adv7511_type type;
 	struct platform_device *audio_pdev;
+
+	struct cec_adapter *cec_adap;
+	u8   cec_addr[ADV7511_MAX_ADDRS];
+	u8   cec_valid_addrs;
+	bool cec_enabled_adap;
+	struct clk *cec_clk;
+	u32 cec_clk_freq;
 };
 
+#ifdef CONFIG_DRM_I2C_ADV7511_CEC
+int adv7511_cec_init(struct device *dev, struct adv7511 *adv7511,
+		     unsigned int offset);
+void adv7511_cec_irq_process(struct adv7511 *adv7511, unsigned int irq1);
+#endif
+
 #ifdef CONFIG_DRM_I2C_ADV7533
 void adv7533_dsi_power_on(struct adv7511 *adv);
 void adv7533_dsi_power_off(struct adv7511 *adv);
 void adv7533_mode_set(struct adv7511 *adv, struct drm_display_mode *mode);
 int adv7533_patch_registers(struct adv7511 *adv);
-void adv7533_uninit_cec(struct adv7511 *adv);
-int adv7533_init_cec(struct adv7511 *adv);
+int adv7533_patch_cec_registers(struct adv7511 *adv);
 int adv7533_attach_dsi(struct adv7511 *adv);
 void adv7533_detach_dsi(struct adv7511 *adv);
 int adv7533_parse_dt(struct device_node *np, struct adv7511 *adv);
@@ -374,11 +405,7 @@ static inline int adv7533_patch_registers(struct adv7511 *adv)
 	return -ENODEV;
 }
 
-static inline void adv7533_uninit_cec(struct adv7511 *adv)
-{
-}
-
-static inline int adv7533_init_cec(struct adv7511 *adv)
+static inline int adv7533_patch_cec_registers(struct adv7511 *adv)
 {
 	return -ENODEV;
 }
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c b/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c
index 67469c26bae8..1b4783d45c53 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c
@@ -210,7 +210,7 @@ static const struct hdmi_codec_ops adv7511_codec_ops = {
 	.get_dai_id	= adv7511_hdmi_i2s_get_dai_id,
 };
 
-static struct hdmi_codec_pdata codec_data = {
+static const struct hdmi_codec_pdata codec_data = {
 	.ops = &adv7511_codec_ops,
 	.max_i2s_channels = 2,
 	.i2s = 1,
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_cec.c b/drivers/gpu/drm/bridge/adv7511/adv7511_cec.c
new file mode 100644
index 000000000000..b33d730e4d73
--- /dev/null
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_cec.c
@@ -0,0 +1,337 @@
+/*
+ * adv7511_cec.c - Analog Devices ADV7511/33 cec driver
+ *
+ * Copyright 2017 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * 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 AUTHORS OR COPYRIGHT HOLDERS
+ * 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/device.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/slab.h>
+#include <linux/clk.h>
+
+#include <media/cec.h>
+
+#include "adv7511.h"
+
+#define ADV7511_INT1_CEC_MASK \
+	(ADV7511_INT1_CEC_TX_READY | ADV7511_INT1_CEC_TX_ARBIT_LOST | \
+	 ADV7511_INT1_CEC_TX_RETRY_TIMEOUT | ADV7511_INT1_CEC_RX_READY1)
+
+static void adv_cec_tx_raw_status(struct adv7511 *adv7511, u8 tx_raw_status)
+{
+	unsigned int offset = adv7511->type == ADV7533 ?
+					ADV7533_REG_CEC_OFFSET : 0;
+	unsigned int val;
+
+	if (regmap_read(adv7511->regmap_cec,
+			ADV7511_REG_CEC_TX_ENABLE + offset, &val))
+		return;
+
+	if ((val & 0x01) == 0)
+		return;
+
+	if (tx_raw_status & ADV7511_INT1_CEC_TX_ARBIT_LOST) {
+		cec_transmit_attempt_done(adv7511->cec_adap,
+					  CEC_TX_STATUS_ARB_LOST);
+		return;
+	}
+	if (tx_raw_status & ADV7511_INT1_CEC_TX_RETRY_TIMEOUT) {
+		u8 status;
+		u8 err_cnt = 0;
+		u8 nack_cnt = 0;
+		u8 low_drive_cnt = 0;
+		unsigned int cnt;
+
+		/*
+		 * We set this status bit since this hardware performs
+		 * retransmissions.
+		 */
+		status = CEC_TX_STATUS_MAX_RETRIES;
+		if (regmap_read(adv7511->regmap_cec,
+			    ADV7511_REG_CEC_TX_LOW_DRV_CNT + offset, &cnt)) {
+			err_cnt = 1;
+			status |= CEC_TX_STATUS_ERROR;
+		} else {
+			nack_cnt = cnt & 0xf;
+			if (nack_cnt)
+				status |= CEC_TX_STATUS_NACK;
+			low_drive_cnt = cnt >> 4;
+			if (low_drive_cnt)
+				status |= CEC_TX_STATUS_LOW_DRIVE;
+		}
+		cec_transmit_done(adv7511->cec_adap, status,
+				  0, nack_cnt, low_drive_cnt, err_cnt);
+		return;
+	}
+	if (tx_raw_status & ADV7511_INT1_CEC_TX_READY) {
+		cec_transmit_attempt_done(adv7511->cec_adap, CEC_TX_STATUS_OK);
+		return;
+	}
+}
+
+void adv7511_cec_irq_process(struct adv7511 *adv7511, unsigned int irq1)
+{
+	unsigned int offset = adv7511->type == ADV7533 ?
+					ADV7533_REG_CEC_OFFSET : 0;
+	const u32 irq_tx_mask = ADV7511_INT1_CEC_TX_READY |
+				ADV7511_INT1_CEC_TX_ARBIT_LOST |
+				ADV7511_INT1_CEC_TX_RETRY_TIMEOUT;
+	struct cec_msg msg = {};
+	unsigned int len;
+	unsigned int val;
+	u8 i;
+
+	if (irq1 & irq_tx_mask)
+		adv_cec_tx_raw_status(adv7511, irq1);
+
+	if (!(irq1 & ADV7511_INT1_CEC_RX_READY1))
+		return;
+
+	if (regmap_read(adv7511->regmap_cec,
+			ADV7511_REG_CEC_RX_FRAME_LEN + offset, &len))
+		return;
+
+	msg.len = len & 0x1f;
+
+	if (msg.len > 16)
+		msg.len = 16;
+
+	if (!msg.len)
+		return;
+
+	for (i = 0; i < msg.len; i++) {
+		regmap_read(adv7511->regmap_cec,
+			    i + ADV7511_REG_CEC_RX_FRAME_HDR + offset, &val);
+		msg.msg[i] = val;
+	}
+
+	/* toggle to re-enable rx 1 */
+	regmap_write(adv7511->regmap_cec,
+		     ADV7511_REG_CEC_RX_BUFFERS + offset, 1);
+	regmap_write(adv7511->regmap_cec,
+		     ADV7511_REG_CEC_RX_BUFFERS + offset, 0);
+	cec_received_msg(adv7511->cec_adap, &msg);
+}
+
+static int adv7511_cec_adap_enable(struct cec_adapter *adap, bool enable)
+{
+	struct adv7511 *adv7511 = cec_get_drvdata(adap);
+	unsigned int offset = adv7511->type == ADV7533 ?
+					ADV7533_REG_CEC_OFFSET : 0;
+
+	if (adv7511->i2c_cec == NULL)
+		return -EIO;
+
+	if (!adv7511->cec_enabled_adap && enable) {
+		/* power up cec section */
+		regmap_update_bits(adv7511->regmap_cec,
+				   ADV7511_REG_CEC_CLK_DIV + offset,
+				   0x03, 0x01);
+		/* legacy mode and clear all rx buffers */
+		regmap_write(adv7511->regmap_cec,
+			     ADV7511_REG_CEC_RX_BUFFERS + offset, 0x07);
+		regmap_write(adv7511->regmap_cec,
+			     ADV7511_REG_CEC_RX_BUFFERS + offset, 0);
+		/* initially disable tx */
+		regmap_update_bits(adv7511->regmap_cec,
+				   ADV7511_REG_CEC_TX_ENABLE + offset, 1, 0);
+		/* enabled irqs: */
+		/* tx: ready */
+		/* tx: arbitration lost */
+		/* tx: retry timeout */
+		/* rx: ready 1 */
+		regmap_update_bits(adv7511->regmap,
+				   ADV7511_REG_INT_ENABLE(1), 0x3f,
+				   ADV7511_INT1_CEC_MASK);
+	} else if (adv7511->cec_enabled_adap && !enable) {
+		regmap_update_bits(adv7511->regmap,
+				   ADV7511_REG_INT_ENABLE(1), 0x3f, 0);
+		/* disable address mask 1-3 */
+		regmap_update_bits(adv7511->regmap_cec,
+				   ADV7511_REG_CEC_LOG_ADDR_MASK + offset,
+				   0x70, 0x00);
+		/* power down cec section */
+		regmap_update_bits(adv7511->regmap_cec,
+				   ADV7511_REG_CEC_CLK_DIV + offset,
+				   0x03, 0x00);
+		adv7511->cec_valid_addrs = 0;
+	}
+	adv7511->cec_enabled_adap = enable;
+	return 0;
+}
+
+static int adv7511_cec_adap_log_addr(struct cec_adapter *adap, u8 addr)
+{
+	struct adv7511 *adv7511 = cec_get_drvdata(adap);
+	unsigned int offset = adv7511->type == ADV7533 ?
+					ADV7533_REG_CEC_OFFSET : 0;
+	unsigned int i, free_idx = ADV7511_MAX_ADDRS;
+
+	if (!adv7511->cec_enabled_adap)
+		return addr == CEC_LOG_ADDR_INVALID ? 0 : -EIO;
+
+	if (addr == CEC_LOG_ADDR_INVALID) {
+		regmap_update_bits(adv7511->regmap_cec,
+				   ADV7511_REG_CEC_LOG_ADDR_MASK + offset,
+				   0x70, 0);
+		adv7511->cec_valid_addrs = 0;
+		return 0;
+	}
+
+	for (i = 0; i < ADV7511_MAX_ADDRS; i++) {
+		bool is_valid = adv7511->cec_valid_addrs & (1 << i);
+
+		if (free_idx == ADV7511_MAX_ADDRS && !is_valid)
+			free_idx = i;
+		if (is_valid && adv7511->cec_addr[i] == addr)
+			return 0;
+	}
+	if (i == ADV7511_MAX_ADDRS) {
+		i = free_idx;
+		if (i == ADV7511_MAX_ADDRS)
+			return -ENXIO;
+	}
+	adv7511->cec_addr[i] = addr;
+	adv7511->cec_valid_addrs |= 1 << i;
+
+	switch (i) {
+	case 0:
+		/* enable address mask 0 */
+		regmap_update_bits(adv7511->regmap_cec,
+				   ADV7511_REG_CEC_LOG_ADDR_MASK + offset,
+				   0x10, 0x10);
+		/* set address for mask 0 */
+		regmap_update_bits(adv7511->regmap_cec,
+				   ADV7511_REG_CEC_LOG_ADDR_0_1 + offset,
+				   0x0f, addr);
+		break;
+	case 1:
+		/* enable address mask 1 */
+		regmap_update_bits(adv7511->regmap_cec,
+				   ADV7511_REG_CEC_LOG_ADDR_MASK + offset,
+				   0x20, 0x20);
+		/* set address for mask 1 */
+		regmap_update_bits(adv7511->regmap_cec,
+				   ADV7511_REG_CEC_LOG_ADDR_0_1 + offset,
+				   0xf0, addr << 4);
+		break;
+	case 2:
+		/* enable address mask 2 */
+		regmap_update_bits(adv7511->regmap_cec,
+				   ADV7511_REG_CEC_LOG_ADDR_MASK + offset,
+				   0x40, 0x40);
+		/* set address for mask 1 */
+		regmap_update_bits(adv7511->regmap_cec,
+				   ADV7511_REG_CEC_LOG_ADDR_2 + offset,
+				   0x0f, addr);
+		break;
+	}
+	return 0;
+}
+
+static int adv7511_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
+				     u32 signal_free_time, struct cec_msg *msg)
+{
+	struct adv7511 *adv7511 = cec_get_drvdata(adap);
+	unsigned int offset = adv7511->type == ADV7533 ?
+					ADV7533_REG_CEC_OFFSET : 0;
+	u8 len = msg->len;
+	unsigned int i;
+
+	/*
+	 * The number of retries is the number of attempts - 1, but retry
+	 * at least once. It's not clear if a value of 0 is allowed, so
+	 * let's do at least one retry.
+	 */
+	regmap_update_bits(adv7511->regmap_cec,
+			   ADV7511_REG_CEC_TX_RETRY + offset,
+			   0x70, max(1, attempts - 1) << 4);
+
+	/* blocking, clear cec tx irq status */
+	regmap_update_bits(adv7511->regmap, ADV7511_REG_INT(1), 0x38, 0x38);
+
+	/* write data */
+	for (i = 0; i < len; i++)
+		regmap_write(adv7511->regmap_cec,
+			     i + ADV7511_REG_CEC_TX_FRAME_HDR + offset,
+			     msg->msg[i]);
+
+	/* set length (data + header) */
+	regmap_write(adv7511->regmap_cec,
+		     ADV7511_REG_CEC_TX_FRAME_LEN + offset, len);
+	/* start transmit, enable tx */
+	regmap_write(adv7511->regmap_cec,
+		     ADV7511_REG_CEC_TX_ENABLE + offset, 0x01);
+	return 0;
+}
+
+static const struct cec_adap_ops adv7511_cec_adap_ops = {
+	.adap_enable = adv7511_cec_adap_enable,
+	.adap_log_addr = adv7511_cec_adap_log_addr,
+	.adap_transmit = adv7511_cec_adap_transmit,
+};
+
+static int adv7511_cec_parse_dt(struct device *dev, struct adv7511 *adv7511)
+{
+	adv7511->cec_clk = devm_clk_get(dev, "cec");
+	if (IS_ERR(adv7511->cec_clk)) {
+		int ret = PTR_ERR(adv7511->cec_clk);
+
+		adv7511->cec_clk = NULL;
+		return ret;
+	}
+	clk_prepare_enable(adv7511->cec_clk);
+	adv7511->cec_clk_freq = clk_get_rate(adv7511->cec_clk);
+	return 0;
+}
+
+int adv7511_cec_init(struct device *dev, struct adv7511 *adv7511,
+		     unsigned int offset)
+{
+	int ret = adv7511_cec_parse_dt(dev, adv7511);
+
+	if (ret)
+		return ret;
+
+	adv7511->cec_adap = cec_allocate_adapter(&adv7511_cec_adap_ops,
+		adv7511, dev_name(dev), CEC_CAP_DEFAULTS, ADV7511_MAX_ADDRS);
+	if (IS_ERR(adv7511->cec_adap))
+		return PTR_ERR(adv7511->cec_adap);
+
+	regmap_write(adv7511->regmap, ADV7511_REG_CEC_CTRL + offset, 0);
+	/* cec soft reset */
+	regmap_write(adv7511->regmap_cec,
+		     ADV7511_REG_CEC_SOFT_RESET + offset, 0x01);
+	regmap_write(adv7511->regmap_cec,
+		     ADV7511_REG_CEC_SOFT_RESET + offset, 0x00);
+
+	/* legacy mode */
+	regmap_write(adv7511->regmap_cec,
+		     ADV7511_REG_CEC_RX_BUFFERS + offset, 0x00);
+
+	regmap_write(adv7511->regmap_cec,
+		     ADV7511_REG_CEC_CLK_DIV + offset,
+		     ((adv7511->cec_clk_freq / 750000) - 1) << 2);
+
+	ret = cec_register_adapter(adv7511->cec_adap, dev);
+	if (ret) {
+		cec_delete_adapter(adv7511->cec_adap);
+		adv7511->cec_adap = NULL;
+	}
+	return ret;
+}
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
index b2431aee7887..0e14f1572d05 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
@@ -11,12 +11,15 @@
 #include <linux/module.h>
 #include <linux/of_device.h>
 #include <linux/slab.h>
+#include <linux/clk.h>
 
 #include <drm/drmP.h>
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_edid.h>
 
+#include <media/cec.h>
+
 #include "adv7511.h"
 
 /* ADI recommended values for proper operation. */
@@ -199,17 +202,14 @@ static const uint16_t adv7511_csc_ycbcr_to_rgb[] = {
 
 static void adv7511_set_config_csc(struct adv7511 *adv7511,
 				   struct drm_connector *connector,
-				   bool rgb)
+				   bool rgb, bool hdmi_mode)
 {
 	struct adv7511_video_config config;
 	bool output_format_422, output_format_ycbcr;
 	unsigned int mode;
 	uint8_t infoframe[17];
 
-	if (adv7511->edid)
-		config.hdmi_mode = drm_detect_hdmi_monitor(adv7511->edid);
-	else
-		config.hdmi_mode = false;
+	config.hdmi_mode = hdmi_mode;
 
 	hdmi_avi_infoframe_init(&config.avi_infoframe);
 
@@ -339,8 +339,10 @@ static void __adv7511_power_on(struct adv7511 *adv7511)
 		 */
 		regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(0),
 			     ADV7511_INT0_EDID_READY | ADV7511_INT0_HPD);
-		regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(1),
-			     ADV7511_INT1_DDC_ERROR);
+		regmap_update_bits(adv7511->regmap,
+				   ADV7511_REG_INT_ENABLE(1),
+				   ADV7511_INT1_DDC_ERROR,
+				   ADV7511_INT1_DDC_ERROR);
 	}
 
 	/*
@@ -376,6 +378,9 @@ static void __adv7511_power_off(struct adv7511 *adv7511)
 	regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
 			   ADV7511_POWER_POWER_DOWN,
 			   ADV7511_POWER_POWER_DOWN);
+	regmap_update_bits(adv7511->regmap,
+			   ADV7511_REG_INT_ENABLE(1),
+			   ADV7511_INT1_DDC_ERROR, 0);
 	regcache_mark_dirty(adv7511->regmap);
 }
 
@@ -426,6 +431,8 @@ static void adv7511_hpd_work(struct work_struct *work)
 
 	if (adv7511->connector.status != status) {
 		adv7511->connector.status = status;
+		if (status == connector_status_disconnected)
+			cec_phys_addr_invalidate(adv7511->cec_adap);
 		drm_kms_helper_hotplug_event(adv7511->connector.dev);
 	}
 }
@@ -456,6 +463,10 @@ static int adv7511_irq_process(struct adv7511 *adv7511, bool process_hpd)
 			wake_up_all(&adv7511->wq);
 	}
 
+#ifdef CONFIG_DRM_I2C_ADV7511_CEC
+	adv7511_cec_irq_process(adv7511, irq1);
+#endif
+
 	return 0;
 }
 
@@ -589,15 +600,16 @@ static int adv7511_get_modes(struct adv7511 *adv7511,
 	if (!adv7511->powered)
 		__adv7511_power_off(adv7511);
 
-	kfree(adv7511->edid);
-	adv7511->edid = edid;
-	if (!edid)
-		return 0;
 
 	drm_mode_connector_update_edid_property(connector, edid);
 	count = drm_add_edid_modes(connector, edid);
 
-	adv7511_set_config_csc(adv7511, connector, adv7511->rgb);
+	adv7511_set_config_csc(adv7511, connector, adv7511->rgb,
+			       drm_detect_hdmi_monitor(edid));
+
+	cec_s_phys_addr_from_edid(adv7511->cec_adap, edid);
+
+	kfree(edid);
 
 	return count;
 }
@@ -833,7 +845,11 @@ static int adv7511_bridge_attach(struct drm_bridge *bridge)
 		return -ENODEV;
 	}
 
-	adv->connector.polled = DRM_CONNECTOR_POLL_HPD;
+	if (adv->i2c_main->irq)
+		adv->connector.polled = DRM_CONNECTOR_POLL_HPD;
+	else
+		adv->connector.polled = DRM_CONNECTOR_POLL_CONNECT |
+				DRM_CONNECTOR_POLL_DISCONNECT;
 
 	ret = drm_connector_init(bridge->dev, &adv->connector,
 				 &adv7511_connector_funcs,
@@ -919,6 +935,65 @@ static void adv7511_uninit_regulators(struct adv7511 *adv)
 	regulator_bulk_disable(adv->num_supplies, adv->supplies);
 }
 
+static bool adv7511_cec_register_volatile(struct device *dev, unsigned int reg)
+{
+	struct i2c_client *i2c = to_i2c_client(dev);
+	struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
+
+	if (adv7511->type == ADV7533)
+		reg -= ADV7533_REG_CEC_OFFSET;
+
+	switch (reg) {
+	case ADV7511_REG_CEC_RX_FRAME_HDR:
+	case ADV7511_REG_CEC_RX_FRAME_DATA0...
+		ADV7511_REG_CEC_RX_FRAME_DATA0 + 14:
+	case ADV7511_REG_CEC_RX_FRAME_LEN:
+	case ADV7511_REG_CEC_RX_BUFFERS:
+	case ADV7511_REG_CEC_TX_LOW_DRV_CNT:
+		return true;
+	}
+
+	return false;
+}
+
+static const struct regmap_config adv7511_cec_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.max_register = 0xff,
+	.cache_type = REGCACHE_RBTREE,
+	.volatile_reg = adv7511_cec_register_volatile,
+};
+
+static int adv7511_init_cec_regmap(struct adv7511 *adv)
+{
+	int ret;
+
+	adv->i2c_cec = i2c_new_dummy(adv->i2c_main->adapter,
+				     adv->i2c_main->addr - 1);
+	if (!adv->i2c_cec)
+		return -ENOMEM;
+	i2c_set_clientdata(adv->i2c_cec, adv);
+
+	adv->regmap_cec = devm_regmap_init_i2c(adv->i2c_cec,
+					&adv7511_cec_regmap_config);
+	if (IS_ERR(adv->regmap_cec)) {
+		ret = PTR_ERR(adv->regmap_cec);
+		goto err;
+	}
+
+	if (adv->type == ADV7533) {
+		ret = adv7533_patch_cec_registers(adv);
+		if (ret)
+			goto err;
+	}
+
+	return 0;
+err:
+	i2c_unregister_device(adv->i2c_cec);
+	return ret;
+}
+
 static int adv7511_parse_dt(struct device_node *np,
 			    struct adv7511_link_config *config)
 {
@@ -1009,6 +1084,7 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 	struct device *dev = &i2c->dev;
 	unsigned int main_i2c_addr = i2c->addr << 1;
 	unsigned int edid_i2c_addr = main_i2c_addr + 4;
+	unsigned int offset;
 	unsigned int val;
 	int ret;
 
@@ -1092,11 +1168,9 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 		goto uninit_regulators;
 	}
 
-	if (adv7511->type == ADV7533) {
-		ret = adv7533_init_cec(adv7511);
-		if (ret)
-			goto err_i2c_unregister_edid;
-	}
+	ret = adv7511_init_cec_regmap(adv7511);
+	if (ret)
+		goto err_i2c_unregister_edid;
 
 	INIT_WORK(&adv7511->hpd_work, adv7511_hpd_work);
 
@@ -1111,10 +1185,6 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 			goto err_unregister_cec;
 	}
 
-	/* CEC is unused for now */
-	regmap_write(adv7511->regmap, ADV7511_REG_CEC_CTRL,
-		     ADV7511_CEC_CTRL_POWER_DOWN);
-
 	adv7511_power_off(adv7511);
 
 	i2c_set_clientdata(i2c, adv7511);
@@ -1129,10 +1199,23 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 
 	adv7511_audio_init(dev, adv7511);
 
+	offset = adv7511->type == ADV7533 ? ADV7533_REG_CEC_OFFSET : 0;
+
+#ifdef CONFIG_DRM_I2C_ADV7511_CEC
+	ret = adv7511_cec_init(dev, adv7511, offset);
+	if (ret)
+		goto err_unregister_cec;
+#else
+	regmap_write(adv7511->regmap, ADV7511_REG_CEC_CTRL + offset,
+		     ADV7511_CEC_CTRL_POWER_DOWN);
+#endif
+
 	return 0;
 
 err_unregister_cec:
-	adv7533_uninit_cec(adv7511);
+	i2c_unregister_device(adv7511->i2c_cec);
+	if (adv7511->cec_clk)
+		clk_disable_unprepare(adv7511->cec_clk);
 err_i2c_unregister_edid:
 	i2c_unregister_device(adv7511->i2c_edid);
 uninit_regulators:
@@ -1145,10 +1228,11 @@ static int adv7511_remove(struct i2c_client *i2c)
 {
 	struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
 
-	if (adv7511->type == ADV7533) {
+	if (adv7511->type == ADV7533)
 		adv7533_detach_dsi(adv7511);
-		adv7533_uninit_cec(adv7511);
-	}
+	i2c_unregister_device(adv7511->i2c_cec);
+	if (adv7511->cec_clk)
+		clk_disable_unprepare(adv7511->cec_clk);
 
 	adv7511_uninit_regulators(adv7511);
 
@@ -1156,9 +1240,9 @@ static int adv7511_remove(struct i2c_client *i2c)
 
 	adv7511_audio_exit(adv7511);
 
-	i2c_unregister_device(adv7511->i2c_edid);
+	cec_unregister_adapter(adv7511->cec_adap);
 
-	kfree(adv7511->edid);
+	i2c_unregister_device(adv7511->i2c_edid);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7533.c b/drivers/gpu/drm/bridge/adv7511/adv7533.c
index ac804f81e2f6..185b6d842166 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7533.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7533.c
@@ -32,14 +32,6 @@ static const struct reg_sequence adv7533_cec_fixed_registers[] = {
 	{ 0x05, 0xc8 },
 };
 
-static const struct regmap_config adv7533_cec_regmap_config = {
-	.reg_bits = 8,
-	.val_bits = 8,
-
-	.max_register = 0xff,
-	.cache_type = REGCACHE_RBTREE,
-};
-
 static void adv7511_dsi_config_timing_gen(struct adv7511 *adv)
 {
 	struct mipi_dsi_device *dsi = adv->dsi;
@@ -145,37 +137,11 @@ int adv7533_patch_registers(struct adv7511 *adv)
 				     ARRAY_SIZE(adv7533_fixed_registers));
 }
 
-void adv7533_uninit_cec(struct adv7511 *adv)
-{
-	i2c_unregister_device(adv->i2c_cec);
-}
-
-int adv7533_init_cec(struct adv7511 *adv)
+int adv7533_patch_cec_registers(struct adv7511 *adv)
 {
-	int ret;
-
-	adv->i2c_cec = i2c_new_dummy(adv->i2c_main->adapter,
-				     adv->i2c_main->addr - 1);
-	if (!adv->i2c_cec)
-		return -ENOMEM;
-
-	adv->regmap_cec = devm_regmap_init_i2c(adv->i2c_cec,
-					&adv7533_cec_regmap_config);
-	if (IS_ERR(adv->regmap_cec)) {
-		ret = PTR_ERR(adv->regmap_cec);
-		goto err;
-	}
-
-	ret = regmap_register_patch(adv->regmap_cec,
+	return regmap_register_patch(adv->regmap_cec,
 				    adv7533_cec_fixed_registers,
 				    ARRAY_SIZE(adv7533_cec_fixed_registers));
-	if (ret)
-		goto err;
-
-	return 0;
-err:
-	adv7533_uninit_cec(adv);
-	return ret;
 }
 
 int adv7533_attach_dsi(struct adv7511 *adv)
diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c
index e0cca19b4044..6d99d4a3beb3 100644
--- a/drivers/gpu/drm/bridge/panel.c
+++ b/drivers/gpu/drm/bridge/panel.c
@@ -188,7 +188,15 @@ EXPORT_SYMBOL(drm_panel_bridge_add);
  */
 void drm_panel_bridge_remove(struct drm_bridge *bridge)
 {
-	struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge);
+	struct panel_bridge *panel_bridge;
+
+	if (!bridge)
+		return;
+
+	if (bridge->funcs != &panel_bridge_bridge_funcs)
+		return;
+
+	panel_bridge = drm_bridge_to_panel_bridge(bridge);
 
 	drm_bridge_remove(bridge);
 	devm_kfree(panel_bridge->panel->dev, bridge);
diff --git a/drivers/gpu/drm/bridge/sii9234.c b/drivers/gpu/drm/bridge/sii9234.c
new file mode 100644
index 000000000000..c77000626c22
--- /dev/null
+++ b/drivers/gpu/drm/bridge/sii9234.c
@@ -0,0 +1,994 @@
+/*
+ * Copyright (C) 2017 Samsung Electronics
+ *
+ * Authors:
+ *    Tomasz Stanislawski <t.stanislaws@samsung.com>
+ *    Maciej Purski <m.purski@samsung.com>
+ *
+ * Based on sii9234 driver created by:
+ *    Adam Hampson <ahampson@sta.samsung.com>
+ *    Erik Gilling <konkers@android.com>
+ *    Shankar Bandal <shankar.b@samsung.com>
+ *    Dharam Kumar <dharam.kr@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program
+ *
+ */
+#include <drm/bridge/mhl.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_edid.h>
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+
+#define CBUS_DEVCAP_OFFSET		0x80
+
+#define SII9234_MHL_VERSION		0x11
+#define SII9234_SCRATCHPAD_SIZE		0x10
+#define SII9234_INT_STAT_SIZE		0x33
+
+#define BIT_TMDS_CCTRL_TMDS_OE		BIT(4)
+#define MHL_HPD_OUT_OVR_EN		BIT(4)
+#define MHL_HPD_OUT_OVR_VAL		BIT(5)
+#define MHL_INIT_TIMEOUT		0x0C
+
+/* MHL Tx registers and bits */
+#define MHL_TX_SRST			0x05
+#define MHL_TX_SYSSTAT_REG		0x09
+#define MHL_TX_INTR1_REG		0x71
+#define MHL_TX_INTR4_REG		0x74
+#define MHL_TX_INTR1_ENABLE_REG		0x75
+#define MHL_TX_INTR4_ENABLE_REG		0x78
+#define MHL_TX_INT_CTRL_REG		0x79
+#define MHL_TX_TMDS_CCTRL		0x80
+#define MHL_TX_DISC_CTRL1_REG		0x90
+#define MHL_TX_DISC_CTRL2_REG		0x91
+#define MHL_TX_DISC_CTRL3_REG		0x92
+#define MHL_TX_DISC_CTRL4_REG		0x93
+#define MHL_TX_DISC_CTRL5_REG		0x94
+#define MHL_TX_DISC_CTRL6_REG		0x95
+#define MHL_TX_DISC_CTRL7_REG		0x96
+#define MHL_TX_DISC_CTRL8_REG		0x97
+#define MHL_TX_STAT2_REG		0x99
+#define MHL_TX_MHLTX_CTL1_REG		0xA0
+#define MHL_TX_MHLTX_CTL2_REG		0xA1
+#define MHL_TX_MHLTX_CTL4_REG		0xA3
+#define MHL_TX_MHLTX_CTL6_REG		0xA5
+#define MHL_TX_MHLTX_CTL7_REG		0xA6
+
+#define RSEN_STATUS			BIT(2)
+#define HPD_CHANGE_INT			BIT(6)
+#define RSEN_CHANGE_INT			BIT(5)
+#define RGND_READY_INT			BIT(6)
+#define VBUS_LOW_INT			BIT(5)
+#define CBUS_LKOUT_INT			BIT(4)
+#define MHL_DISC_FAIL_INT		BIT(3)
+#define MHL_EST_INT			BIT(2)
+#define HPD_CHANGE_INT_MASK		BIT(6)
+#define RSEN_CHANGE_INT_MASK		BIT(5)
+
+#define RGND_READY_MASK			BIT(6)
+#define CBUS_LKOUT_MASK			BIT(4)
+#define MHL_DISC_FAIL_MASK		BIT(3)
+#define MHL_EST_MASK			BIT(2)
+
+#define SKIP_GND			BIT(6)
+
+#define ATT_THRESH_SHIFT		0x04
+#define ATT_THRESH_MASK			(0x03 << ATT_THRESH_SHIFT)
+#define USB_D_OEN			BIT(3)
+#define DEGLITCH_TIME_MASK		0x07
+#define DEGLITCH_TIME_2MS		0
+#define DEGLITCH_TIME_4MS		1
+#define DEGLITCH_TIME_8MS		2
+#define DEGLITCH_TIME_16MS		3
+#define DEGLITCH_TIME_40MS		4
+#define DEGLITCH_TIME_50MS		5
+#define DEGLITCH_TIME_60MS		6
+#define DEGLITCH_TIME_128MS		7
+
+#define USB_D_OVR			BIT(7)
+#define USB_ID_OVR			BIT(6)
+#define DVRFLT_SEL			BIT(5)
+#define BLOCK_RGND_INT			BIT(4)
+#define SKIP_DEG			BIT(3)
+#define CI2CA_POL			BIT(2)
+#define CI2CA_WKUP			BIT(1)
+#define SINGLE_ATT			BIT(0)
+
+#define USB_D_ODN			BIT(5)
+#define VBUS_CHECK			BIT(2)
+#define RGND_INTP_MASK			0x03
+#define RGND_INTP_OPEN			0
+#define RGND_INTP_2K			1
+#define RGND_INTP_1K			2
+#define RGND_INTP_SHORT			3
+
+/* HDMI registers */
+#define HDMI_RX_TMDS0_CCTRL1_REG	0x10
+#define HDMI_RX_TMDS_CLK_EN_REG		0x11
+#define HDMI_RX_TMDS_CH_EN_REG		0x12
+#define HDMI_RX_PLL_CALREFSEL_REG	0x17
+#define HDMI_RX_PLL_VCOCAL_REG		0x1A
+#define HDMI_RX_EQ_DATA0_REG		0x22
+#define HDMI_RX_EQ_DATA1_REG		0x23
+#define HDMI_RX_EQ_DATA2_REG		0x24
+#define HDMI_RX_EQ_DATA3_REG		0x25
+#define HDMI_RX_EQ_DATA4_REG		0x26
+#define HDMI_RX_TMDS_ZONE_CTRL_REG	0x4C
+#define HDMI_RX_TMDS_MODE_CTRL_REG	0x4D
+
+/* CBUS registers */
+#define CBUS_INT_STATUS_1_REG		0x08
+#define CBUS_INTR1_ENABLE_REG		0x09
+#define CBUS_MSC_REQ_ABORT_REASON_REG	0x0D
+#define CBUS_INT_STATUS_2_REG		0x1E
+#define CBUS_INTR2_ENABLE_REG		0x1F
+#define CBUS_LINK_CONTROL_2_REG		0x31
+#define CBUS_MHL_STATUS_REG_0		0xB0
+#define CBUS_MHL_STATUS_REG_1		0xB1
+
+#define BIT_CBUS_RESET			BIT(3)
+#define SET_HPD_DOWNSTREAM		BIT(6)
+
+/* TPI registers */
+#define TPI_DPD_REG			0x3D
+
+/* Timeouts in msec */
+#define T_SRC_VBUS_CBUS_TO_STABLE	200
+#define T_SRC_CBUS_FLOAT		100
+#define T_SRC_CBUS_DEGLITCH		2
+#define T_SRC_RXSENSE_DEGLITCH		110
+
+#define MHL1_MAX_CLK			75000 /* in kHz */
+
+#define I2C_TPI_ADDR			0x3D
+#define I2C_HDMI_ADDR			0x49
+#define I2C_CBUS_ADDR			0x64
+
+enum sii9234_state {
+	ST_OFF,
+	ST_D3,
+	ST_RGND_INIT,
+	ST_RGND_1K,
+	ST_RSEN_HIGH,
+	ST_MHL_ESTABLISHED,
+	ST_FAILURE_DISCOVERY,
+	ST_FAILURE,
+};
+
+struct sii9234 {
+	struct i2c_client *client[4];
+	struct drm_bridge bridge;
+	struct device *dev;
+	struct gpio_desc *gpio_reset;
+	int i2c_error;
+	struct regulator_bulk_data supplies[4];
+
+	struct mutex lock; /* Protects fields below and device registers */
+	enum sii9234_state state;
+};
+
+enum sii9234_client_id {
+	I2C_MHL,
+	I2C_TPI,
+	I2C_HDMI,
+	I2C_CBUS,
+};
+
+static const char * const sii9234_client_name[] = {
+	[I2C_MHL] = "MHL",
+	[I2C_TPI] = "TPI",
+	[I2C_HDMI] = "HDMI",
+	[I2C_CBUS] = "CBUS",
+};
+
+static int sii9234_writeb(struct sii9234 *ctx, int id, int offset,
+			  int value)
+{
+	int ret;
+	struct i2c_client *client = ctx->client[id];
+
+	if (ctx->i2c_error)
+		return ctx->i2c_error;
+
+	ret = i2c_smbus_write_byte_data(client, offset, value);
+	if (ret < 0)
+		dev_err(ctx->dev, "writeb: %4s[0x%02x] <- 0x%02x\n",
+			sii9234_client_name[id], offset, value);
+	ctx->i2c_error = ret;
+
+	return ret;
+}
+
+static int sii9234_writebm(struct sii9234 *ctx, int id, int offset,
+			   int value, int mask)
+{
+	int ret;
+	struct i2c_client *client = ctx->client[id];
+
+	if (ctx->i2c_error)
+		return ctx->i2c_error;
+
+	ret = i2c_smbus_write_byte(client, offset);
+	if (ret < 0) {
+		dev_err(ctx->dev, "writebm: %4s[0x%02x] <- 0x%02x\n",
+			sii9234_client_name[id], offset, value);
+		ctx->i2c_error = ret;
+		return ret;
+	}
+
+	ret = i2c_smbus_read_byte(client);
+	if (ret < 0) {
+		dev_err(ctx->dev, "writebm: %4s[0x%02x] <- 0x%02x\n",
+			sii9234_client_name[id], offset, value);
+		ctx->i2c_error = ret;
+		return ret;
+	}
+
+	value = (value & mask) | (ret & ~mask);
+
+	ret = i2c_smbus_write_byte_data(client, offset, value);
+	if (ret < 0) {
+		dev_err(ctx->dev, "writebm: %4s[0x%02x] <- 0x%02x\n",
+			sii9234_client_name[id], offset, value);
+		ctx->i2c_error = ret;
+	}
+
+	return ret;
+}
+
+static int sii9234_readb(struct sii9234 *ctx, int id, int offset)
+{
+	int ret;
+	struct i2c_client *client = ctx->client[id];
+
+	if (ctx->i2c_error)
+		return ctx->i2c_error;
+
+	ret = i2c_smbus_write_byte(client, offset);
+	if (ret < 0) {
+		dev_err(ctx->dev, "readb: %4s[0x%02x]\n",
+			sii9234_client_name[id], offset);
+		ctx->i2c_error = ret;
+		return ret;
+	}
+
+	ret = i2c_smbus_read_byte(client);
+	if (ret < 0) {
+		dev_err(ctx->dev, "readb: %4s[0x%02x]\n",
+			sii9234_client_name[id], offset);
+		ctx->i2c_error = ret;
+	}
+
+	return ret;
+}
+
+static int sii9234_clear_error(struct sii9234 *ctx)
+{
+	int ret = ctx->i2c_error;
+
+	ctx->i2c_error = 0;
+
+	return ret;
+}
+
+#define mhl_tx_writeb(sii9234, offset, value) \
+	sii9234_writeb(sii9234, I2C_MHL, offset, value)
+#define mhl_tx_writebm(sii9234, offset, value, mask) \
+	sii9234_writebm(sii9234, I2C_MHL, offset, value, mask)
+#define mhl_tx_readb(sii9234, offset) \
+	sii9234_readb(sii9234, I2C_MHL, offset)
+#define cbus_writeb(sii9234, offset, value) \
+	sii9234_writeb(sii9234, I2C_CBUS, offset, value)
+#define cbus_writebm(sii9234, offset, value, mask) \
+	sii9234_writebm(sii9234, I2C_CBUS, offset, value, mask)
+#define cbus_readb(sii9234, offset) \
+	sii9234_readb(sii9234, I2C_CBUS, offset)
+#define hdmi_writeb(sii9234, offset, value) \
+	sii9234_writeb(sii9234, I2C_HDMI, offset, value)
+#define hdmi_writebm(sii9234, offset, value, mask) \
+	sii9234_writebm(sii9234, I2C_HDMI, offset, value, mask)
+#define hdmi_readb(sii9234, offset) \
+	sii9234_readb(sii9234, I2C_HDMI, offset)
+#define tpi_writeb(sii9234, offset, value) \
+	sii9234_writeb(sii9234, I2C_TPI, offset, value)
+#define tpi_writebm(sii9234, offset, value, mask) \
+	sii9234_writebm(sii9234, I2C_TPI, offset, value, mask)
+#define tpi_readb(sii9234, offset) \
+	sii9234_readb(sii9234, I2C_TPI, offset)
+
+static u8 sii9234_tmds_control(struct sii9234 *ctx, bool enable)
+{
+	mhl_tx_writebm(ctx, MHL_TX_TMDS_CCTRL, enable ? ~0 : 0,
+		       BIT_TMDS_CCTRL_TMDS_OE);
+	mhl_tx_writebm(ctx, MHL_TX_INT_CTRL_REG, enable ? ~0 : 0,
+		       MHL_HPD_OUT_OVR_EN | MHL_HPD_OUT_OVR_VAL);
+	return sii9234_clear_error(ctx);
+}
+
+static int sii9234_cbus_reset(struct sii9234 *ctx)
+{
+	int i;
+
+	mhl_tx_writebm(ctx, MHL_TX_SRST, ~0, BIT_CBUS_RESET);
+	msleep(T_SRC_CBUS_DEGLITCH);
+	mhl_tx_writebm(ctx, MHL_TX_SRST, 0, BIT_CBUS_RESET);
+
+	for (i = 0; i < 4; i++) {
+		/*
+		 * Enable WRITE_STAT interrupt for writes to all
+		 * 4 MSC Status registers.
+		 */
+		cbus_writeb(ctx, 0xE0 + i, 0xF2);
+		/*
+		 * Enable SET_INT interrupt for writes to all
+		 * 4 MSC Interrupt registers.
+		 */
+		cbus_writeb(ctx, 0xF0 + i, 0xF2);
+	}
+
+	return sii9234_clear_error(ctx);
+}
+
+/* Require to chek mhl imformation of samsung in cbus_init_register */
+static int sii9234_cbus_init(struct sii9234 *ctx)
+{
+	cbus_writeb(ctx, 0x07, 0xF2);
+	cbus_writeb(ctx, 0x40, 0x03);
+	cbus_writeb(ctx, 0x42, 0x06);
+	cbus_writeb(ctx, 0x36, 0x0C);
+	cbus_writeb(ctx, 0x3D, 0xFD);
+	cbus_writeb(ctx, 0x1C, 0x01);
+	cbus_writeb(ctx, 0x1D, 0x0F);
+	cbus_writeb(ctx, 0x44, 0x02);
+	/* Setup our devcap */
+	cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_DEV_STATE, 0x00);
+	cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_MHL_VERSION,
+		    SII9234_MHL_VERSION);
+	cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_CAT,
+		    MHL_DCAP_CAT_SOURCE);
+	cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_ADOPTER_ID_H, 0x01);
+	cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_ADOPTER_ID_L, 0x41);
+	cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_VID_LINK_MODE,
+		    MHL_DCAP_VID_LINK_RGB444 | MHL_DCAP_VID_LINK_YCBCR444);
+	cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_VIDEO_TYPE,
+		    MHL_DCAP_VT_GRAPHICS);
+	cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_LOG_DEV_MAP,
+		    MHL_DCAP_LD_GUI);
+	cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_BANDWIDTH, 0x0F);
+	cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_FEATURE_FLAG,
+		    MHL_DCAP_FEATURE_RCP_SUPPORT | MHL_DCAP_FEATURE_RAP_SUPPORT
+			| MHL_DCAP_FEATURE_SP_SUPPORT);
+	cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_DEVICE_ID_H, 0x0);
+	cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_DEVICE_ID_L, 0x0);
+	cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_SCRATCHPAD_SIZE,
+		    SII9234_SCRATCHPAD_SIZE);
+	cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_INT_STAT_SIZE,
+		    SII9234_INT_STAT_SIZE);
+	cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_RESERVED, 0);
+	cbus_writebm(ctx, 0x31, 0x0C, 0x0C);
+	cbus_writeb(ctx, 0x30, 0x01);
+	cbus_writebm(ctx, 0x3C, 0x30, 0x38);
+	cbus_writebm(ctx, 0x22, 0x0D, 0x0F);
+	cbus_writebm(ctx, 0x2E, 0x15, 0x15);
+	cbus_writeb(ctx, CBUS_INTR1_ENABLE_REG, 0);
+	cbus_writeb(ctx, CBUS_INTR2_ENABLE_REG, 0);
+
+	return sii9234_clear_error(ctx);
+}
+
+static void force_usb_id_switch_open(struct sii9234 *ctx)
+{
+	/* Disable CBUS discovery */
+	mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL1_REG, 0, 0x01);
+	/* Force USB ID switch to open */
+	mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL6_REG, ~0, USB_ID_OVR);
+	mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL3_REG, ~0, 0x86);
+	/* Force upstream HPD to 0 when not in MHL mode. */
+	mhl_tx_writebm(ctx, MHL_TX_INT_CTRL_REG, 0, 0x30);
+}
+
+static void release_usb_id_switch_open(struct sii9234 *ctx)
+{
+	msleep(T_SRC_CBUS_FLOAT);
+	/* Clear USB ID switch to open */
+	mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL6_REG, 0, USB_ID_OVR);
+	/* Enable CBUS discovery */
+	mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL1_REG, ~0, 0x01);
+}
+
+static int sii9234_power_init(struct sii9234 *ctx)
+{
+	/* Force the SiI9234 into the D0 state. */
+	tpi_writeb(ctx, TPI_DPD_REG, 0x3F);
+	/* Enable TxPLL Clock */
+	hdmi_writeb(ctx, HDMI_RX_TMDS_CLK_EN_REG, 0x01);
+	/* Enable Tx Clock Path & Equalizer */
+	hdmi_writeb(ctx, HDMI_RX_TMDS_CH_EN_REG, 0x15);
+	/* Power Up TMDS */
+	mhl_tx_writeb(ctx, 0x08, 0x35);
+	return sii9234_clear_error(ctx);
+}
+
+static int sii9234_hdmi_init(struct sii9234 *ctx)
+{
+	hdmi_writeb(ctx, HDMI_RX_TMDS0_CCTRL1_REG, 0xC1);
+	hdmi_writeb(ctx, HDMI_RX_PLL_CALREFSEL_REG, 0x03);
+	hdmi_writeb(ctx, HDMI_RX_PLL_VCOCAL_REG, 0x20);
+	hdmi_writeb(ctx, HDMI_RX_EQ_DATA0_REG, 0x8A);
+	hdmi_writeb(ctx, HDMI_RX_EQ_DATA1_REG, 0x6A);
+	hdmi_writeb(ctx, HDMI_RX_EQ_DATA2_REG, 0xAA);
+	hdmi_writeb(ctx, HDMI_RX_EQ_DATA3_REG, 0xCA);
+	hdmi_writeb(ctx, HDMI_RX_EQ_DATA4_REG, 0xEA);
+	hdmi_writeb(ctx, HDMI_RX_TMDS_ZONE_CTRL_REG, 0xA0);
+	hdmi_writeb(ctx, HDMI_RX_TMDS_MODE_CTRL_REG, 0x00);
+	mhl_tx_writeb(ctx, MHL_TX_TMDS_CCTRL, 0x34);
+	hdmi_writeb(ctx, 0x45, 0x44);
+	hdmi_writeb(ctx, 0x31, 0x0A);
+	hdmi_writeb(ctx, HDMI_RX_TMDS0_CCTRL1_REG, 0xC1);
+
+	return sii9234_clear_error(ctx);
+}
+
+static int sii9234_mhl_tx_ctl_int(struct sii9234 *ctx)
+{
+	mhl_tx_writeb(ctx, MHL_TX_MHLTX_CTL1_REG, 0xD0);
+	mhl_tx_writeb(ctx, MHL_TX_MHLTX_CTL2_REG, 0xFC);
+	mhl_tx_writeb(ctx, MHL_TX_MHLTX_CTL4_REG, 0xEB);
+	mhl_tx_writeb(ctx, MHL_TX_MHLTX_CTL7_REG, 0x0C);
+
+	return sii9234_clear_error(ctx);
+}
+
+static int sii9234_reset(struct sii9234 *ctx)
+{
+	int ret;
+
+	sii9234_clear_error(ctx);
+
+	ret = sii9234_power_init(ctx);
+	if (ret < 0)
+		return ret;
+	ret = sii9234_cbus_reset(ctx);
+	if (ret < 0)
+		return ret;
+	ret = sii9234_hdmi_init(ctx);
+	if (ret < 0)
+		return ret;
+	ret = sii9234_mhl_tx_ctl_int(ctx);
+	if (ret < 0)
+		return ret;
+
+	/* Enable HDCP Compliance safety */
+	mhl_tx_writeb(ctx, 0x2B, 0x01);
+	/* CBUS discovery cycle time for each drive and float = 150us */
+	mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL1_REG, 0x04, 0x06);
+	/* Clear bit 6 (reg_skip_rgnd) */
+	mhl_tx_writeb(ctx, MHL_TX_DISC_CTRL2_REG, (1 << 7) /* Reserved */
+		      | 2 << ATT_THRESH_SHIFT | DEGLITCH_TIME_50MS);
+	/*
+	 * Changed from 66 to 65 for 94[1:0] = 01 = 5k reg_cbusmhl_pup_sel
+	 * 1.8V CBUS VTH & GND threshold
+	 * to meet CTS 3.3.7.2 spec
+	 */
+	mhl_tx_writeb(ctx, MHL_TX_DISC_CTRL5_REG, 0x77);
+	cbus_writebm(ctx, CBUS_LINK_CONTROL_2_REG, ~0, MHL_INIT_TIMEOUT);
+	mhl_tx_writeb(ctx, MHL_TX_MHLTX_CTL6_REG, 0xA0);
+	/* RGND & single discovery attempt (RGND blocking) */
+	mhl_tx_writeb(ctx, MHL_TX_DISC_CTRL6_REG, BLOCK_RGND_INT |
+		      DVRFLT_SEL | SINGLE_ATT);
+	/* Use VBUS path of discovery state machine */
+	mhl_tx_writeb(ctx, MHL_TX_DISC_CTRL8_REG, 0);
+	/* 0x92[3] sets the CBUS / ID switch */
+	mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL6_REG, ~0, USB_ID_OVR);
+	/*
+	 * To allow RGND engine to operate correctly.
+	 * When moving the chip from D2 to D0 (power up, init regs)
+	 * the values should be
+	 * 94[1:0] = 01  reg_cbusmhl_pup_sel[1:0] should be set for 5k
+	 * 93[7:6] = 10  reg_cbusdisc_pup_sel[1:0] should be
+	 * set for 10k (default)
+	 * 93[5:4] = 00  reg_cbusidle_pup_sel[1:0] = open (default)
+	 */
+	mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL3_REG, ~0, 0x86);
+	/*
+	 * Change from CC to 8C to match 5K
+	 * to meet CTS 3.3.72 spec
+	 */
+	mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL4_REG, ~0, 0x8C);
+	/* Configure the interrupt as active high */
+	mhl_tx_writebm(ctx, MHL_TX_INT_CTRL_REG, 0, 0x06);
+
+	msleep(25);
+
+	/* Release usb_id switch */
+	mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL6_REG, 0,  USB_ID_OVR);
+	mhl_tx_writeb(ctx, MHL_TX_DISC_CTRL1_REG, 0x27);
+
+	ret = sii9234_clear_error(ctx);
+	if (ret < 0)
+		return ret;
+	ret = sii9234_cbus_init(ctx);
+	if (ret < 0)
+		return ret;
+
+	/* Enable Auto soft reset on SCDT = 0 */
+	mhl_tx_writeb(ctx, 0x05, 0x04);
+	/* HDMI Transcode mode enable */
+	mhl_tx_writeb(ctx, 0x0D, 0x1C);
+	mhl_tx_writeb(ctx, MHL_TX_INTR4_ENABLE_REG,
+		      RGND_READY_MASK | CBUS_LKOUT_MASK
+			| MHL_DISC_FAIL_MASK | MHL_EST_MASK);
+	mhl_tx_writeb(ctx, MHL_TX_INTR1_ENABLE_REG, 0x60);
+
+	/* This point is very important before measure RGND impedance */
+	force_usb_id_switch_open(ctx);
+	mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL4_REG, 0, 0xF0);
+	mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL5_REG, 0, 0x03);
+	release_usb_id_switch_open(ctx);
+
+	/* Force upstream HPD to 0 when not in MHL mode */
+	mhl_tx_writebm(ctx, MHL_TX_INT_CTRL_REG, 0, 1 << 5);
+	mhl_tx_writebm(ctx, MHL_TX_INT_CTRL_REG, ~0, 1 << 4);
+
+	return sii9234_clear_error(ctx);
+}
+
+static int sii9234_goto_d3(struct sii9234 *ctx)
+{
+	int ret;
+
+	dev_dbg(ctx->dev, "sii9234: detection started d3\n");
+
+	ret = sii9234_reset(ctx);
+	if (ret < 0)
+		goto exit;
+
+	hdmi_writeb(ctx, 0x01, 0x03);
+	tpi_writebm(ctx, TPI_DPD_REG, 0, 1);
+	/* I2C above is expected to fail because power goes down */
+	sii9234_clear_error(ctx);
+
+	ctx->state = ST_D3;
+
+	return 0;
+ exit:
+	dev_err(ctx->dev, "%s failed\n", __func__);
+	return -1;
+}
+
+static int sii9234_hw_on(struct sii9234 *ctx)
+{
+	return regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+}
+
+static void sii9234_hw_off(struct sii9234 *ctx)
+{
+	gpiod_set_value(ctx->gpio_reset, 1);
+	msleep(20);
+	regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+}
+
+static void sii9234_hw_reset(struct sii9234 *ctx)
+{
+	gpiod_set_value(ctx->gpio_reset, 1);
+	msleep(20);
+	gpiod_set_value(ctx->gpio_reset, 0);
+}
+
+static void sii9234_cable_in(struct sii9234 *ctx)
+{
+	int ret;
+
+	mutex_lock(&ctx->lock);
+	if (ctx->state != ST_OFF)
+		goto unlock;
+	ret = sii9234_hw_on(ctx);
+	if (ret < 0)
+		goto unlock;
+
+	sii9234_hw_reset(ctx);
+	sii9234_goto_d3(ctx);
+	/* To avoid irq storm, when hw is in meta state */
+	enable_irq(to_i2c_client(ctx->dev)->irq);
+
+unlock:
+	mutex_unlock(&ctx->lock);
+}
+
+static void sii9234_cable_out(struct sii9234 *ctx)
+{
+	mutex_lock(&ctx->lock);
+
+	if (ctx->state == ST_OFF)
+		goto unlock;
+
+	disable_irq(to_i2c_client(ctx->dev)->irq);
+	tpi_writeb(ctx, TPI_DPD_REG, 0);
+	/* Turn on&off hpd festure for only QCT HDMI */
+	sii9234_hw_off(ctx);
+
+	ctx->state = ST_OFF;
+
+unlock:
+	mutex_unlock(&ctx->lock);
+}
+
+static enum sii9234_state sii9234_rgnd_ready_irq(struct sii9234 *ctx)
+{
+	int value;
+
+	if (ctx->state == ST_D3) {
+		int ret;
+
+		dev_dbg(ctx->dev, "RGND_READY_INT\n");
+		sii9234_hw_reset(ctx);
+
+		ret = sii9234_reset(ctx);
+		if (ret < 0) {
+			dev_err(ctx->dev, "sii9234_reset() failed\n");
+			return ST_FAILURE;
+		}
+
+		return ST_RGND_INIT;
+	}
+
+	/* Got interrupt in inappropriate state */
+	if (ctx->state != ST_RGND_INIT)
+		return ST_FAILURE;
+
+	value = mhl_tx_readb(ctx, MHL_TX_STAT2_REG);
+	if (sii9234_clear_error(ctx))
+		return ST_FAILURE;
+
+	if ((value & RGND_INTP_MASK) != RGND_INTP_1K) {
+		dev_warn(ctx->dev, "RGND is not 1k\n");
+		return ST_RGND_INIT;
+	}
+	dev_dbg(ctx->dev, "RGND 1K!!\n");
+	mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL4_REG, ~0, 0x8C);
+	mhl_tx_writeb(ctx, MHL_TX_DISC_CTRL5_REG, 0x77);
+	mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL6_REG, ~0, 0x05);
+	if (sii9234_clear_error(ctx))
+		return ST_FAILURE;
+
+	msleep(T_SRC_VBUS_CBUS_TO_STABLE);
+	return ST_RGND_1K;
+}
+
+static enum sii9234_state sii9234_mhl_established(struct sii9234 *ctx)
+{
+	dev_dbg(ctx->dev, "mhl est interrupt\n");
+
+	/* Discovery override */
+	mhl_tx_writeb(ctx, MHL_TX_MHLTX_CTL1_REG, 0x10);
+	/* Increase DDC translation layer timer (byte mode) */
+	cbus_writeb(ctx, 0x07, 0x32);
+	cbus_writebm(ctx, 0x44, ~0, 1 << 1);
+	/* Keep the discovery enabled. Need RGND interrupt */
+	mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL1_REG, ~0, 1);
+	mhl_tx_writeb(ctx, MHL_TX_INTR1_ENABLE_REG,
+		      RSEN_CHANGE_INT_MASK | HPD_CHANGE_INT_MASK);
+
+	if (sii9234_clear_error(ctx))
+		return ST_FAILURE;
+
+	return ST_MHL_ESTABLISHED;
+}
+
+static enum sii9234_state sii9234_hpd_change(struct sii9234 *ctx)
+{
+	int value;
+
+	value = cbus_readb(ctx, CBUS_MSC_REQ_ABORT_REASON_REG);
+	if (sii9234_clear_error(ctx))
+		return ST_FAILURE;
+
+	if (value & SET_HPD_DOWNSTREAM) {
+		/* Downstream HPD High, Enable TMDS */
+		sii9234_tmds_control(ctx, true);
+	} else {
+		/* Downstream HPD Low, Disable TMDS */
+		sii9234_tmds_control(ctx, false);
+	}
+
+	return ctx->state;
+}
+
+static enum sii9234_state sii9234_rsen_change(struct sii9234 *ctx)
+{
+	int value;
+
+	/* Work_around code to handle wrong interrupt */
+	if (ctx->state != ST_RGND_1K) {
+		dev_err(ctx->dev, "RSEN_HIGH without RGND_1K\n");
+		return ST_FAILURE;
+	}
+	value = mhl_tx_readb(ctx, MHL_TX_SYSSTAT_REG);
+	if (value < 0)
+		return ST_FAILURE;
+
+	if (value & RSEN_STATUS) {
+		dev_dbg(ctx->dev, "MHL cable connected.. RSEN High\n");
+		return ST_RSEN_HIGH;
+	}
+	dev_dbg(ctx->dev, "RSEN lost\n");
+	/*
+	 * Once RSEN loss is confirmed,we need to check
+	 * based on cable status and chip power status,whether
+	 * it is SINK Loss(HDMI cable not connected, TV Off)
+	 * or MHL cable disconnection
+	 * TODO: Define the below mhl_disconnection()
+	 */
+	msleep(T_SRC_RXSENSE_DEGLITCH);
+	value = mhl_tx_readb(ctx, MHL_TX_SYSSTAT_REG);
+	if (value < 0)
+		return ST_FAILURE;
+	dev_dbg(ctx->dev, "sys_stat: %x\n", value);
+
+	if (value & RSEN_STATUS) {
+		dev_dbg(ctx->dev, "RSEN recovery\n");
+		return ST_RSEN_HIGH;
+	}
+	dev_dbg(ctx->dev, "RSEN Really LOW\n");
+	/* To meet CTS 3.3.22.2 spec */
+	sii9234_tmds_control(ctx, false);
+	force_usb_id_switch_open(ctx);
+	release_usb_id_switch_open(ctx);
+
+	return ST_FAILURE;
+}
+
+static irqreturn_t sii9234_irq_thread(int irq, void *data)
+{
+	struct sii9234 *ctx = data;
+	int intr1, intr4;
+	int intr1_en, intr4_en;
+	int cbus_intr1, cbus_intr2;
+
+	dev_dbg(ctx->dev, "%s\n", __func__);
+
+	mutex_lock(&ctx->lock);
+
+	intr1 = mhl_tx_readb(ctx, MHL_TX_INTR1_REG);
+	intr4 = mhl_tx_readb(ctx, MHL_TX_INTR4_REG);
+	intr1_en = mhl_tx_readb(ctx, MHL_TX_INTR1_ENABLE_REG);
+	intr4_en = mhl_tx_readb(ctx, MHL_TX_INTR4_ENABLE_REG);
+	cbus_intr1 = cbus_readb(ctx, CBUS_INT_STATUS_1_REG);
+	cbus_intr2 = cbus_readb(ctx, CBUS_INT_STATUS_2_REG);
+
+	if (sii9234_clear_error(ctx))
+		goto done;
+
+	dev_dbg(ctx->dev, "irq %02x/%02x %02x/%02x %02x/%02x\n",
+		intr1, intr1_en, intr4, intr4_en, cbus_intr1, cbus_intr2);
+
+	if (intr4 & RGND_READY_INT)
+		ctx->state = sii9234_rgnd_ready_irq(ctx);
+	if (intr1 & RSEN_CHANGE_INT)
+		ctx->state = sii9234_rsen_change(ctx);
+	if (intr4 & MHL_EST_INT)
+		ctx->state = sii9234_mhl_established(ctx);
+	if (intr1 & HPD_CHANGE_INT)
+		ctx->state = sii9234_hpd_change(ctx);
+	if (intr4 & CBUS_LKOUT_INT)
+		ctx->state = ST_FAILURE;
+	if (intr4 & MHL_DISC_FAIL_INT)
+		ctx->state = ST_FAILURE_DISCOVERY;
+
+ done:
+	/* Clean interrupt status and pending flags */
+	mhl_tx_writeb(ctx, MHL_TX_INTR1_REG, intr1);
+	mhl_tx_writeb(ctx, MHL_TX_INTR4_REG, intr4);
+	cbus_writeb(ctx, CBUS_MHL_STATUS_REG_0, 0xFF);
+	cbus_writeb(ctx, CBUS_MHL_STATUS_REG_1, 0xFF);
+	cbus_writeb(ctx, CBUS_INT_STATUS_1_REG, cbus_intr1);
+	cbus_writeb(ctx, CBUS_INT_STATUS_2_REG, cbus_intr2);
+
+	sii9234_clear_error(ctx);
+
+	if (ctx->state == ST_FAILURE) {
+		dev_dbg(ctx->dev, "try to reset after failure\n");
+		sii9234_hw_reset(ctx);
+		sii9234_goto_d3(ctx);
+	}
+
+	if (ctx->state == ST_FAILURE_DISCOVERY) {
+		dev_err(ctx->dev, "discovery failed, no power for MHL?\n");
+		tpi_writebm(ctx, TPI_DPD_REG, 0, 1);
+		ctx->state = ST_D3;
+	}
+
+	mutex_unlock(&ctx->lock);
+
+	return IRQ_HANDLED;
+}
+
+static int sii9234_init_resources(struct sii9234 *ctx,
+				  struct i2c_client *client)
+{
+	struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+	int ret;
+
+	if (!ctx->dev->of_node) {
+		dev_err(ctx->dev, "not DT device\n");
+		return -ENODEV;
+	}
+
+	ctx->gpio_reset = devm_gpiod_get(ctx->dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(ctx->gpio_reset)) {
+		dev_err(ctx->dev, "failed to get reset gpio from DT\n");
+		return PTR_ERR(ctx->gpio_reset);
+	}
+
+	ctx->supplies[0].supply = "avcc12";
+	ctx->supplies[1].supply = "avcc33";
+	ctx->supplies[2].supply = "iovcc18";
+	ctx->supplies[3].supply = "cvcc12";
+	ret = devm_regulator_bulk_get(ctx->dev, 4, ctx->supplies);
+	if (ret) {
+		dev_err(ctx->dev, "regulator_bulk failed\n");
+		return ret;
+	}
+
+	ctx->client[I2C_MHL] = client;
+
+	ctx->client[I2C_TPI] = i2c_new_dummy(adapter, I2C_TPI_ADDR);
+	if (!ctx->client[I2C_TPI]) {
+		dev_err(ctx->dev, "failed to create TPI client\n");
+		return -ENODEV;
+	}
+
+	ctx->client[I2C_HDMI] = i2c_new_dummy(adapter, I2C_HDMI_ADDR);
+	if (!ctx->client[I2C_HDMI]) {
+		dev_err(ctx->dev, "failed to create HDMI RX client\n");
+		goto fail_tpi;
+	}
+
+	ctx->client[I2C_CBUS] = i2c_new_dummy(adapter, I2C_CBUS_ADDR);
+	if (!ctx->client[I2C_CBUS]) {
+		dev_err(ctx->dev, "failed to create CBUS client\n");
+		goto fail_hdmi;
+	}
+
+	return 0;
+
+fail_hdmi:
+	i2c_unregister_device(ctx->client[I2C_HDMI]);
+fail_tpi:
+	i2c_unregister_device(ctx->client[I2C_TPI]);
+
+	return -ENODEV;
+}
+
+static void sii9234_deinit_resources(struct sii9234 *ctx)
+{
+	i2c_unregister_device(ctx->client[I2C_CBUS]);
+	i2c_unregister_device(ctx->client[I2C_HDMI]);
+	i2c_unregister_device(ctx->client[I2C_TPI]);
+}
+
+static inline struct sii9234 *bridge_to_sii9234(struct drm_bridge *bridge)
+{
+	return container_of(bridge, struct sii9234, bridge);
+}
+
+static enum drm_mode_status sii9234_mode_valid(struct drm_bridge *bridge,
+					 const struct drm_display_mode *mode)
+{
+	if (mode->clock > MHL1_MAX_CLK)
+		return MODE_CLOCK_HIGH;
+
+	return MODE_OK;
+}
+
+static const struct drm_bridge_funcs sii9234_bridge_funcs = {
+	.mode_valid = sii9234_mode_valid,
+};
+
+static int sii9234_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+	struct sii9234 *ctx;
+	struct device *dev = &client->dev;
+	int ret;
+
+	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	ctx->dev = dev;
+	mutex_init(&ctx->lock);
+
+	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
+		dev_err(dev, "I2C adapter lacks SMBUS feature\n");
+		return -EIO;
+	}
+
+	if (!client->irq) {
+		dev_err(dev, "no irq provided\n");
+		return -EINVAL;
+	}
+
+	irq_set_status_flags(client->irq, IRQ_NOAUTOEN);
+	ret = devm_request_threaded_irq(dev, client->irq, NULL,
+					sii9234_irq_thread,
+					IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+					"sii9234", ctx);
+	if (ret < 0) {
+		dev_err(dev, "failed to install IRQ handler\n");
+		return ret;
+	}
+
+	ret = sii9234_init_resources(ctx, client);
+	if (ret < 0)
+		return ret;
+
+	i2c_set_clientdata(client, ctx);
+
+	ctx->bridge.funcs = &sii9234_bridge_funcs;
+	ctx->bridge.of_node = dev->of_node;
+	drm_bridge_add(&ctx->bridge);
+
+	sii9234_cable_in(ctx);
+
+	return 0;
+}
+
+static int sii9234_remove(struct i2c_client *client)
+{
+	struct sii9234 *ctx = i2c_get_clientdata(client);
+
+	sii9234_cable_out(ctx);
+	drm_bridge_remove(&ctx->bridge);
+	sii9234_deinit_resources(ctx);
+
+	return 0;
+}
+
+static const struct of_device_id sii9234_dt_match[] = {
+	{ .compatible = "sil,sii9234" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, sii9234_dt_match);
+
+static const struct i2c_device_id sii9234_id[] = {
+	{ "SII9234", 0 },
+	{ },
+};
+MODULE_DEVICE_TABLE(i2c, sii9234_id);
+
+static struct i2c_driver sii9234_driver = {
+	.driver = {
+		.name	= "sii9234",
+		.of_match_table = sii9234_dt_match,
+	},
+	.probe = sii9234_probe,
+	.remove = sii9234_remove,
+	.id_table = sii9234_id,
+};
+
+module_i2c_driver(sii9234_driver);
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/bridge/sil-sii8620.c b/drivers/gpu/drm/bridge/sil-sii8620.c
index 5131bfb94f06..b7eb704d0a8a 100644
--- a/drivers/gpu/drm/bridge/sil-sii8620.c
+++ b/drivers/gpu/drm/bridge/sil-sii8620.c
@@ -28,6 +28,8 @@
 #include <linux/regulator/consumer.h>
 #include <linux/slab.h>
 
+#include <media/rc-core.h>
+
 #include "sil-sii8620.h"
 
 #define SII8620_BURST_BUF_LEN 288
@@ -58,6 +60,7 @@ enum sii8620_mt_state {
 struct sii8620 {
 	struct drm_bridge bridge;
 	struct device *dev;
+	struct rc_dev *rc_dev;
 	struct clk *clk_xtal;
 	struct gpio_desc *gpio_reset;
 	struct gpio_desc *gpio_int;
@@ -431,6 +434,16 @@ static void sii8620_mt_rap(struct sii8620 *ctx, u8 code)
 	sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RAP, code);
 }
 
+static void sii8620_mt_rcpk(struct sii8620 *ctx, u8 code)
+{
+	sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RCPK, code);
+}
+
+static void sii8620_mt_rcpe(struct sii8620 *ctx, u8 code)
+{
+	sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RCPE, code);
+}
+
 static void sii8620_mt_read_devcap_send(struct sii8620 *ctx,
 					struct sii8620_mt_msg *msg)
 {
@@ -1753,6 +1766,25 @@ static void sii8620_send_features(struct sii8620 *ctx)
 	sii8620_write_buf(ctx, REG_MDT_XMIT_WRITE_PORT, buf, ARRAY_SIZE(buf));
 }
 
+static bool sii8620_rcp_consume(struct sii8620 *ctx, u8 scancode)
+{
+	bool pressed = !(scancode & MHL_RCP_KEY_RELEASED_MASK);
+
+	scancode &= MHL_RCP_KEY_ID_MASK;
+
+	if (!ctx->rc_dev) {
+		dev_dbg(ctx->dev, "RCP input device not initialized\n");
+		return false;
+	}
+
+	if (pressed)
+		rc_keydown(ctx->rc_dev, RC_PROTO_CEC, scancode, 0);
+	else
+		rc_keyup(ctx->rc_dev);
+
+	return true;
+}
+
 static void sii8620_msc_mr_set_int(struct sii8620 *ctx)
 {
 	u8 ints[MHL_INT_SIZE];
@@ -1804,19 +1836,25 @@ static void sii8620_msc_mt_done(struct sii8620 *ctx)
 
 static void sii8620_msc_mr_msc_msg(struct sii8620 *ctx)
 {
-	struct sii8620_mt_msg *msg = sii8620_msc_msg_first(ctx);
+	struct sii8620_mt_msg *msg;
 	u8 buf[2];
 
-	if (!msg)
-		return;
-
 	sii8620_read_buf(ctx, REG_MSC_MR_MSC_MSG_RCVD_1ST_DATA, buf, 2);
 
 	switch (buf[0]) {
 	case MHL_MSC_MSG_RAPK:
+		msg = sii8620_msc_msg_first(ctx);
+		if (!msg)
+			return;
 		msg->ret = buf[1];
 		ctx->mt_state = MT_STATE_DONE;
 		break;
+	case MHL_MSC_MSG_RCP:
+		if (!sii8620_rcp_consume(ctx, buf[1]))
+			sii8620_mt_rcpe(ctx,
+					MHL_RCPE_STATUS_INEFFECTIVE_KEY_CODE);
+		sii8620_mt_rcpk(ctx, buf[1]);
+		break;
 	default:
 		dev_err(ctx->dev, "%s message type %d,%d not supported",
 			__func__, buf[0], buf[1]);
@@ -2102,11 +2140,57 @@ static void sii8620_cable_in(struct sii8620 *ctx)
 	enable_irq(to_i2c_client(ctx->dev)->irq);
 }
 
+static void sii8620_init_rcp_input_dev(struct sii8620 *ctx)
+{
+	struct rc_dev *rc_dev;
+	int ret;
+
+	rc_dev = rc_allocate_device(RC_DRIVER_SCANCODE);
+	if (!rc_dev) {
+		dev_err(ctx->dev, "Failed to allocate RC device\n");
+		ctx->error = -ENOMEM;
+		return;
+	}
+
+	rc_dev->input_phys = "sii8620/input0";
+	rc_dev->input_id.bustype = BUS_VIRTUAL;
+	rc_dev->map_name = RC_MAP_CEC;
+	rc_dev->allowed_protocols = RC_PROTO_BIT_CEC;
+	rc_dev->driver_name = "sii8620";
+	rc_dev->device_name = "sii8620";
+
+	ret = rc_register_device(rc_dev);
+
+	if (ret) {
+		dev_err(ctx->dev, "Failed to register RC device\n");
+		ctx->error = ret;
+		rc_free_device(ctx->rc_dev);
+		return;
+	}
+	ctx->rc_dev = rc_dev;
+}
+
 static inline struct sii8620 *bridge_to_sii8620(struct drm_bridge *bridge)
 {
 	return container_of(bridge, struct sii8620, bridge);
 }
 
+static int sii8620_attach(struct drm_bridge *bridge)
+{
+	struct sii8620 *ctx = bridge_to_sii8620(bridge);
+
+	sii8620_init_rcp_input_dev(ctx);
+
+	return sii8620_clear_error(ctx);
+}
+
+static void sii8620_detach(struct drm_bridge *bridge)
+{
+	struct sii8620 *ctx = bridge_to_sii8620(bridge);
+
+	rc_unregister_device(ctx->rc_dev);
+}
+
 static bool sii8620_mode_fixup(struct drm_bridge *bridge,
 			       const struct drm_display_mode *mode,
 			       struct drm_display_mode *adjusted_mode)
@@ -2151,6 +2235,8 @@ end:
 }
 
 static const struct drm_bridge_funcs sii8620_bridge_funcs = {
+	.attach = sii8620_attach,
+	.detach = sii8620_detach,
 	.mode_fixup = sii8620_mode_fixup,
 };
 
@@ -2217,8 +2303,8 @@ static int sii8620_remove(struct i2c_client *client)
 	struct sii8620 *ctx = i2c_get_clientdata(client);
 
 	disable_irq(to_i2c_client(ctx->dev)->irq);
-	drm_bridge_remove(&ctx->bridge);
 	sii8620_hw_off(ctx);
+	drm_bridge_remove(&ctx->bridge);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
index 63c7a01b7053..d9cca4fd66ec 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
@@ -30,19 +30,20 @@
 #include <video/mipi_display.h>
 
 #define DSI_VERSION			0x00
+
 #define DSI_PWR_UP			0x04
 #define RESET				0
 #define POWERUP				BIT(0)
 
 #define DSI_CLKMGR_CFG			0x08
-#define TO_CLK_DIVIDSION(div)		(((div) & 0xff) << 8)
-#define TX_ESC_CLK_DIVIDSION(div)	(((div) & 0xff) << 0)
+#define TO_CLK_DIVISION(div)		(((div) & 0xff) << 8)
+#define TX_ESC_CLK_DIVISION(div)	((div) & 0xff)
 
 #define DSI_DPI_VCID			0x0c
-#define DPI_VID(vid)			(((vid) & 0x3) << 0)
+#define DPI_VCID(vcid)			((vcid) & 0x3)
 
 #define DSI_DPI_COLOR_CODING		0x10
-#define EN18_LOOSELY			BIT(8)
+#define LOOSELY18_EN			BIT(8)
 #define DPI_COLOR_CODING_16BIT_1	0x0
 #define DPI_COLOR_CODING_16BIT_2	0x1
 #define DPI_COLOR_CODING_16BIT_3	0x2
@@ -61,22 +62,25 @@
 #define OUTVACT_LPCMD_TIME(p)		(((p) & 0xff) << 16)
 #define INVACT_LPCMD_TIME(p)		((p) & 0xff)
 
+#define DSI_DBI_VCID			0x1c
 #define DSI_DBI_CFG			0x20
+#define DSI_DBI_PARTITIONING_EN		0x24
 #define DSI_DBI_CMDSIZE			0x28
 
 #define DSI_PCKHDL_CFG			0x2c
-#define EN_CRC_RX			BIT(4)
-#define EN_ECC_RX			BIT(3)
-#define EN_BTA				BIT(2)
-#define EN_EOTP_RX			BIT(1)
-#define EN_EOTP_TX			BIT(0)
+#define CRC_RX_EN			BIT(4)
+#define ECC_RX_EN			BIT(3)
+#define BTA_EN				BIT(2)
+#define EOTP_RX_EN			BIT(1)
+#define EOTP_TX_EN			BIT(0)
+
+#define DSI_GEN_VCID			0x30
 
 #define DSI_MODE_CFG			0x34
 #define ENABLE_VIDEO_MODE		0
 #define ENABLE_CMD_MODE			BIT(0)
 
 #define DSI_VID_MODE_CFG		0x38
-#define FRAME_BTA_ACK			BIT(14)
 #define ENABLE_LOW_POWER		(0x3f << 8)
 #define ENABLE_LOW_POWER_MASK		(0x3f << 8)
 #define VID_MODE_TYPE_NON_BURST_SYNC_PULSES	0x0
@@ -85,8 +89,13 @@
 #define VID_MODE_TYPE_MASK			0x3
 
 #define DSI_VID_PKT_SIZE		0x3c
-#define VID_PKT_SIZE(p)			(((p) & 0x3fff) << 0)
-#define VID_PKT_MAX_SIZE		0x3fff
+#define VID_PKT_SIZE(p)			((p) & 0x3fff)
+
+#define DSI_VID_NUM_CHUNKS		0x40
+#define VID_NUM_CHUNKS(c)		((c) & 0x1fff)
+
+#define DSI_VID_NULL_SIZE		0x44
+#define VID_NULL_SIZE(b)		((b) & 0x1fff)
 
 #define DSI_VID_HSA_TIME		0x48
 #define DSI_VID_HBP_TIME		0x4c
@@ -95,6 +104,8 @@
 #define DSI_VID_VBP_LINES		0x58
 #define DSI_VID_VFP_LINES		0x5c
 #define DSI_VID_VACTIVE_LINES		0x60
+#define DSI_EDPI_CMD_SIZE		0x64
+
 #define DSI_CMD_MODE_CFG		0x68
 #define MAX_RD_PKT_SIZE_LP		BIT(24)
 #define DCS_LW_TX_LP			BIT(19)
@@ -108,8 +119,8 @@
 #define GEN_SW_2P_TX_LP			BIT(10)
 #define GEN_SW_1P_TX_LP			BIT(9)
 #define GEN_SW_0P_TX_LP			BIT(8)
-#define EN_ACK_RQST			BIT(1)
-#define EN_TEAR_FX			BIT(0)
+#define ACK_RQST_EN			BIT(1)
+#define TEAR_FX_EN			BIT(0)
 
 #define CMD_MODE_ALL_LP			(MAX_RD_PKT_SIZE_LP | \
 					 DCS_LW_TX_LP | \
@@ -125,27 +136,31 @@
 					 GEN_SW_0P_TX_LP)
 
 #define DSI_GEN_HDR			0x6c
+/* TODO These 2 defines will be reworked thanks to mipi_dsi_create_packet() */
 #define GEN_HDATA(data)			(((data) & 0xffff) << 8)
-#define GEN_HDATA_MASK			(0xffff << 8)
 #define GEN_HTYPE(type)			(((type) & 0xff) << 0)
-#define GEN_HTYPE_MASK			0xff
 
 #define DSI_GEN_PLD_DATA		0x70
 
 #define DSI_CMD_PKT_STATUS		0x74
-#define GEN_CMD_EMPTY			BIT(0)
-#define GEN_CMD_FULL			BIT(1)
-#define GEN_PLD_W_EMPTY			BIT(2)
-#define GEN_PLD_W_FULL			BIT(3)
-#define GEN_PLD_R_EMPTY			BIT(4)
-#define GEN_PLD_R_FULL			BIT(5)
 #define GEN_RD_CMD_BUSY			BIT(6)
+#define GEN_PLD_R_FULL			BIT(5)
+#define GEN_PLD_R_EMPTY			BIT(4)
+#define GEN_PLD_W_FULL			BIT(3)
+#define GEN_PLD_W_EMPTY			BIT(2)
+#define GEN_CMD_FULL			BIT(1)
+#define GEN_CMD_EMPTY			BIT(0)
 
 #define DSI_TO_CNT_CFG			0x78
 #define HSTX_TO_CNT(p)			(((p) & 0xffff) << 16)
 #define LPRX_TO_CNT(p)			((p) & 0xffff)
 
+#define DSI_HS_RD_TO_CNT		0x7c
+#define DSI_LP_RD_TO_CNT		0x80
+#define DSI_HS_WR_TO_CNT		0x84
+#define DSI_LP_WR_TO_CNT		0x88
 #define DSI_BTA_TO_CNT			0x8c
+
 #define DSI_LPCLK_CTRL			0x94
 #define AUTO_CLKLANE_CTRL		BIT(1)
 #define PHY_TXREQUESTCLKHS		BIT(0)
@@ -154,6 +169,7 @@
 #define PHY_CLKHS2LP_TIME(lbcc)		(((lbcc) & 0x3ff) << 16)
 #define PHY_CLKLP2HS_TIME(lbcc)		((lbcc) & 0x3ff)
 
+/* TODO Next register is slightly different between 1.30 & 1.31 IP version */
 #define DSI_PHY_TMR_CFG			0x9c
 #define PHY_HS2LP_TIME(lbcc)		(((lbcc) & 0xff) << 24)
 #define PHY_LP2HS_TIME(lbcc)		(((lbcc) & 0xff) << 16)
@@ -170,12 +186,15 @@
 #define PHY_UNSHUTDOWNZ			BIT(0)
 
 #define DSI_PHY_IF_CFG			0xa4
-#define N_LANES(n)			((((n) - 1) & 0x3) << 0)
 #define PHY_STOP_WAIT_TIME(cycle)	(((cycle) & 0xff) << 8)
+#define N_LANES(n)			(((n) - 1) & 0x3)
+
+#define DSI_PHY_ULPS_CTRL		0xa8
+#define DSI_PHY_TX_TRIGGERS		0xac
 
 #define DSI_PHY_STATUS			0xb0
-#define LOCK				BIT(0)
-#define STOP_STATE_CLK_LANE		BIT(2)
+#define PHY_STOP_STATE_CLK_LANE		BIT(2)
+#define PHY_LOCK			BIT(0)
 
 #define DSI_PHY_TST_CTRL0		0xb4
 #define PHY_TESTCLK			BIT(1)
@@ -187,12 +206,13 @@
 #define PHY_TESTEN			BIT(16)
 #define PHY_UNTESTEN			0
 #define PHY_TESTDOUT(n)			(((n) & 0xff) << 8)
-#define PHY_TESTDIN(n)			(((n) & 0xff) << 0)
+#define PHY_TESTDIN(n)			((n) & 0xff)
 
 #define DSI_INT_ST0			0xbc
 #define DSI_INT_ST1			0xc0
 #define DSI_INT_MSK0			0xc4
 #define DSI_INT_MSK1			0xc8
+#define DSI_PHY_TMR_RD_CFG		0xf4
 
 #define PHY_STATUS_TIMEOUT_US		10000
 #define CMD_PKT_STATUS_TIMEOUT_US	20000
@@ -201,7 +221,6 @@ struct dw_mipi_dsi {
 	struct drm_bridge bridge;
 	struct mipi_dsi_host dsi_host;
 	struct drm_bridge *panel_bridge;
-	bool is_panel_bridge;
 	struct device *dev;
 	void __iomem *base;
 
@@ -277,7 +296,6 @@ static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
 		bridge = drm_panel_bridge_add(panel, DRM_MODE_CONNECTOR_DSI);
 		if (IS_ERR(bridge))
 			return PTR_ERR(bridge);
-		dsi->is_panel_bridge = true;
 	}
 
 	dsi->panel_bridge = bridge;
@@ -292,8 +310,7 @@ static int dw_mipi_dsi_host_detach(struct mipi_dsi_host *host,
 {
 	struct dw_mipi_dsi *dsi = host_to_dsi(host);
 
-	if (dsi->is_panel_bridge)
-		drm_panel_bridge_remove(dsi->panel_bridge);
+	drm_of_panel_bridge_remove(host->dev->of_node, 1, 0);
 
 	drm_bridge_remove(&dsi->bridge);
 
@@ -307,7 +324,7 @@ static void dw_mipi_message_config(struct dw_mipi_dsi *dsi,
 	u32 val = 0;
 
 	if (msg->flags & MIPI_DSI_MSG_REQ_ACK)
-		val |= EN_ACK_RQST;
+		val |= ACK_RQST_EN;
 	if (lpm)
 		val |= CMD_MODE_ALL_LP;
 
@@ -506,8 +523,8 @@ static void dw_mipi_dsi_init(struct dw_mipi_dsi *dsi)
 	 * timeout clock division should be computed with the
 	 * high speed transmission counter timeout and byte lane...
 	 */
-	dsi_write(dsi, DSI_CLKMGR_CFG, TO_CLK_DIVIDSION(10) |
-		  TX_ESC_CLK_DIVIDSION(esc_clk_division));
+	dsi_write(dsi, DSI_CLKMGR_CFG, TO_CLK_DIVISION(10) |
+		  TX_ESC_CLK_DIVISION(esc_clk_division));
 }
 
 static void dw_mipi_dsi_dpi_config(struct dw_mipi_dsi *dsi,
@@ -520,7 +537,7 @@ static void dw_mipi_dsi_dpi_config(struct dw_mipi_dsi *dsi,
 		color = DPI_COLOR_CODING_24BIT;
 		break;
 	case MIPI_DSI_FMT_RGB666:
-		color = DPI_COLOR_CODING_18BIT_2 | EN18_LOOSELY;
+		color = DPI_COLOR_CODING_18BIT_2 | LOOSELY18_EN;
 		break;
 	case MIPI_DSI_FMT_RGB666_PACKED:
 		color = DPI_COLOR_CODING_18BIT_1;
@@ -535,7 +552,7 @@ static void dw_mipi_dsi_dpi_config(struct dw_mipi_dsi *dsi,
 	if (mode->flags & DRM_MODE_FLAG_NHSYNC)
 		val |= HSYNC_ACTIVE_LOW;
 
-	dsi_write(dsi, DSI_DPI_VCID, DPI_VID(dsi->channel));
+	dsi_write(dsi, DSI_DPI_VCID, DPI_VCID(dsi->channel));
 	dsi_write(dsi, DSI_DPI_COLOR_CODING, color);
 	dsi_write(dsi, DSI_DPI_CFG_POL, val);
 	/*
@@ -550,7 +567,7 @@ static void dw_mipi_dsi_dpi_config(struct dw_mipi_dsi *dsi,
 
 static void dw_mipi_dsi_packet_handler_config(struct dw_mipi_dsi *dsi)
 {
-	dsi_write(dsi, DSI_PCKHDL_CFG, EN_CRC_RX | EN_ECC_RX | EN_BTA);
+	dsi_write(dsi, DSI_PCKHDL_CFG, CRC_RX_EN | ECC_RX_EN | BTA_EN);
 }
 
 static void dw_mipi_dsi_video_packet_config(struct dw_mipi_dsi *dsi,
@@ -571,7 +588,7 @@ static void dw_mipi_dsi_command_mode_config(struct dw_mipi_dsi *dsi)
 	/*
 	 * TODO dw drv improvements
 	 * compute high speed transmission counter timeout according
-	 * to the timeout clock division (TO_CLK_DIVIDSION) and byte lane...
+	 * to the timeout clock division (TO_CLK_DIVISION) and byte lane...
 	 */
 	dsi_write(dsi, DSI_TO_CNT_CFG, HSTX_TO_CNT(1000) | LPRX_TO_CNT(1000));
 	/*
@@ -684,13 +701,13 @@ static void dw_mipi_dsi_dphy_enable(struct dw_mipi_dsi *dsi)
 	dsi_write(dsi, DSI_PHY_RSTZ, PHY_ENFORCEPLL | PHY_ENABLECLK |
 		  PHY_UNRSTZ | PHY_UNSHUTDOWNZ);
 
-	ret = readl_poll_timeout(dsi->base + DSI_PHY_STATUS,
-				 val, val & LOCK, 1000, PHY_STATUS_TIMEOUT_US);
+	ret = readl_poll_timeout(dsi->base + DSI_PHY_STATUS, val,
+				 val & PHY_LOCK, 1000, PHY_STATUS_TIMEOUT_US);
 	if (ret < 0)
 		DRM_DEBUG_DRIVER("failed to wait phy lock state\n");
 
 	ret = readl_poll_timeout(dsi->base + DSI_PHY_STATUS,
-				 val, val & STOP_STATE_CLK_LANE, 1000,
+				 val, val & PHY_STOP_STATE_CLK_LANE, 1000,
 				 PHY_STATUS_TIMEOUT_US);
 	if (ret < 0)
 		DRM_DEBUG_DRIVER("failed to wait phy clk lane stop state\n");
@@ -865,15 +882,14 @@ __dw_mipi_dsi_probe(struct platform_device *pdev,
 	 * Note that the reset was not defined in the initial device tree, so
 	 * we have to be prepared for it not being found.
 	 */
-	apb_rst = devm_reset_control_get(dev, "apb");
+	apb_rst = devm_reset_control_get_optional_exclusive(dev, "apb");
 	if (IS_ERR(apb_rst)) {
 		ret = PTR_ERR(apb_rst);
-		if (ret == -ENOENT) {
-			apb_rst = NULL;
-		} else {
+
+		if (ret != -EPROBE_DEFER)
 			dev_err(dev, "Unable to get reset control: %d\n", ret);
-			return ERR_PTR(ret);
-		}
+
+		return ERR_PTR(ret);
 	}
 
 	if (apb_rst) {