Merge tag 'drm-next-2018-12-14' of git://anongit.freedesktop.org/drm/drm

Pull drm updates from Dave Airlie:
 "Core:
   - shared fencing staging removal
   - drop transactional atomic helpers and move helpers to new location
   - DP/MST atomic cleanup
   - Leasing cleanups and drop EXPORT_SYMBOL
   - Convert drivers to atomic helpers and generic fbdev.
   - removed deprecated obj_ref/unref in favour of get/put
   - Improve dumb callback documentation
   - MODESET_LOCK_BEGIN/END helpers

  panels:
   - CDTech panels, Banana Pi Panel, DLC1010GIG,
   - Olimex LCD-O-LinuXino, Samsung S6D16D0, Truly NT35597 WQXGA,
   - Himax HX8357D, simulated RTSM AEMv8.
   - GPD Win2 panel
   - AUO G101EVN010

  vgem:
   - render node support

  ttm:
   - move global init out of drivers
   - fix LRU handling for ghost objects
   - Support for simultaneous submissions to multiple engines

  scheduler:
   - timeout/fault handling changes to help GPU recovery
   - helpers for hw with preemption support

  i915:
   - Scaler/Watermark fixes
   - DP MST + powerwell fixes
   - PSR fixes
   - Break long get/put shmemfs pages
   - Icelake fixes
   - Icelake DSI video mode enablement
   - Engine workaround improvements

  amdgpu:
   - freesync support
   - GPU reset enabled on CI, VI, SOC15 dGPUs
   - ABM support in DC
   - KFD support for vega12/polaris12
   - SDMA paging queue on vega
   - More amdkfd code sharing
   - DCC scanout on GFX9
   - DC kerneldoc
   - Updated SMU firmware for GFX8 chips
   - XGMI PSP + hive reset support
   - GPU reset
   - DC trace support
   - Powerplay updates for newer Polaris
   - Cursor plane update fast path
   - kfd dma-buf support

  virtio-gpu:
   - add EDID support

  vmwgfx:
   - pageflip with damage support

  nouveau:
   - Initial Turing TU104/TU106 modesetting support

  msm:
   - a2xx gpu support for apq8060 and imx5
   - a2xx gpummu support
   - mdp4 display support for apq8060
   - DPU fixes and cleanups
   - enhanced profiling support
   - debug object naming interface
   - get_iova/page pinning decoupling

  tegra:
   - Tegra194 host1x, VIC and display support enabled
   - Audio over HDMI for Tegra186 and Tegra194

  exynos:
   - DMA/IOMMU refactoring
   - plane alpha + blend mode support
   - Color format fixes for mixer driver

  rcar-du:
   - R8A7744 and R8A77470 support
   - R8A77965 LVDS support

  imx:
   - fbdev emulation fix
   - multi-tiled scalling fixes
   - SPDX identifiers

  rockchip
   - dw_hdmi support
   - dw-mipi-dsi + dual dsi support
   - mailbox read size fix

  qxl:
   - fix cursor pinning

  vc4:
   - YUV support (scaling + cursor)

  v3d:
   - enable TFU (Texture Formatting Unit)

  mali-dp:
   - add support for linear tiled formats

  sun4i:
   - Display Engine 3 support
   - H6 DE3 mixer 0 support
   - H6 display engine support
   - dw-hdmi support
   - H6 HDMI phy support
   - implicit fence waiting
   - BGRX8888 support

  meson:
   - Overlay plane support
   - implicit fence waiting
   - HDMI 1.4 4k modes

  bridge:
   - i2c fixes for sii902x"

* tag 'drm-next-2018-12-14' of git://anongit.freedesktop.org/drm/drm: (1403 commits)
  drm/amd/display: Add fast path for cursor plane updates
  drm/amdgpu: Enable GPU recovery by default for CI
  drm/amd/display: Fix duplicating scaling/underscan connector state
  drm/amd/display: Fix unintialized max_bpc state values
  Revert "drm/amd/display: Set RMX_ASPECT as default"
  drm/amdgpu: Fix stub function name
  drm/msm/dpu: Fix clock issue after bind failure
  drm/msm/dpu: Clean up dpu_media_info.h static inline functions
  drm/msm/dpu: Further cleanups for static inline functions
  drm/msm/dpu: Cleanup the debugfs functions
  drm/msm/dpu: Remove dpu_irq and unused functions
  drm/msm: Make irq_postinstall optional
  drm/msm/dpu: Cleanup callers of dpu_hw_blk_init
  drm/msm/dpu: Remove unused functions
  drm/msm/dpu: Remove dpu_crtc_is_enabled()
  drm/msm/dpu: Remove dpu_crtc_get_mixer_height
  drm/msm/dpu: Remove dpu_dbg
  drm/msm: dpu: Remove crtc_lock
  drm/msm: dpu: Remove vblank_requested flag from dpu_crtc
  drm/msm: dpu: Separate crtc assignment from vblank enable
  ...

6 files changed, 284 insertions, 98 deletions

diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index 9eeb8ef0b174..2fee47b0d50b 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -95,6 +95,7 @@ config DRM_SII902X
 	depends on OF
 	select DRM_KMS_HELPER
 	select REGMAP_I2C
+	select I2C_MUX
 	---help---
 	  Silicon Image sii902x bridge chip driver.
 
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 2f21d3b6850b..753e96129ab7 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -1219,12 +1219,12 @@ static int analogix_dp_bridge_attach(struct drm_bridge *bridge)
 	 * plat_data->attch return, that's why we record the connector
 	 * point after plat attached.
 	 */
-	 if (dp->plat_data->attach) {
-		 ret = dp->plat_data->attach(dp->plat_data, bridge, connector);
-		 if (ret) {
-			 DRM_ERROR("Failed at platform attch func\n");
-			 return ret;
-		 }
+	if (dp->plat_data->attach) {
+		ret = dp->plat_data->attach(dp->plat_data, bridge, connector);
+		if (ret) {
+			DRM_ERROR("Failed at platform attach func\n");
+			return ret;
+		}
 	}
 
 	if (dp->plat_data->panel) {
diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
index e59a13542333..bfa902013aa4 100644
--- a/drivers/gpu/drm/bridge/sii902x.c
+++ b/drivers/gpu/drm/bridge/sii902x.c
@@ -1,4 +1,6 @@
 /*
+ * Copyright (C) 2018 Renesas Electronics
+ *
  * Copyright (C) 2016 Atmel
  *		      Bo Shen <voice.shen@atmel.com>
  *
@@ -21,6 +23,7 @@
  */
 
 #include <linux/gpio/consumer.h>
+#include <linux/i2c-mux.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/regmap.h>
@@ -86,8 +89,49 @@ struct sii902x {
 	struct drm_bridge bridge;
 	struct drm_connector connector;
 	struct gpio_desc *reset_gpio;
+	struct i2c_mux_core *i2cmux;
 };
 
+static int sii902x_read_unlocked(struct i2c_client *i2c, u8 reg, u8 *val)
+{
+	union i2c_smbus_data data;
+	int ret;
+
+	ret = __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,
+			       I2C_SMBUS_READ, reg, I2C_SMBUS_BYTE_DATA, &data);
+
+	if (ret < 0)
+		return ret;
+
+	*val = data.byte;
+	return 0;
+}
+
+static int sii902x_write_unlocked(struct i2c_client *i2c, u8 reg, u8 val)
+{
+	union i2c_smbus_data data;
+
+	data.byte = val;
+
+	return __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,
+				I2C_SMBUS_WRITE, reg, I2C_SMBUS_BYTE_DATA,
+				&data);
+}
+
+static int sii902x_update_bits_unlocked(struct i2c_client *i2c, u8 reg, u8 mask,
+					u8 val)
+{
+	int ret;
+	u8 status;
+
+	ret = sii902x_read_unlocked(i2c, reg, &status);
+	if (ret)
+		return ret;
+	status &= ~mask;
+	status |= val & mask;
+	return sii902x_write_unlocked(i2c, reg, status);
+}
+
 static inline struct sii902x *bridge_to_sii902x(struct drm_bridge *bridge)
 {
 	return container_of(bridge, struct sii902x, bridge);
@@ -135,41 +179,11 @@ static const struct drm_connector_funcs sii902x_connector_funcs = {
 static int sii902x_get_modes(struct drm_connector *connector)
 {
 	struct sii902x *sii902x = connector_to_sii902x(connector);
-	struct regmap *regmap = sii902x->regmap;
 	u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
-	struct device *dev = &sii902x->i2c->dev;
-	unsigned long timeout;
-	unsigned int retries;
-	unsigned int status;
 	struct edid *edid;
-	int num = 0;
-	int ret;
-
-	ret = regmap_update_bits(regmap, SII902X_SYS_CTRL_DATA,
-				 SII902X_SYS_CTRL_DDC_BUS_REQ,
-				 SII902X_SYS_CTRL_DDC_BUS_REQ);
-	if (ret)
-		return ret;
-
-	timeout = jiffies +
-		  msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
-	do {
-		ret = regmap_read(regmap, SII902X_SYS_CTRL_DATA, &status);
-		if (ret)
-			return ret;
-	} while (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
-		 time_before(jiffies, timeout));
+	int num = 0, ret;
 
-	if (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
-		dev_err(dev, "failed to acquire the i2c bus\n");
-		return -ETIMEDOUT;
-	}
-
-	ret = regmap_write(regmap, SII902X_SYS_CTRL_DATA, status);
-	if (ret)
-		return ret;
-
-	edid = drm_get_edid(connector, sii902x->i2c->adapter);
+	edid = drm_get_edid(connector, sii902x->i2cmux->adapter[0]);
 	drm_connector_update_edid_property(connector, edid);
 	if (edid) {
 		num = drm_add_edid_modes(connector, edid);
@@ -181,42 +195,6 @@ static int sii902x_get_modes(struct drm_connector *connector)
 	if (ret)
 		return ret;
 
-	/*
-	 * Sometimes the I2C bus can stall after failure to use the
-	 * EDID channel. Retry a few times to see if things clear
-	 * up, else continue anyway.
-	 */
-	retries = 5;
-	do {
-		ret = regmap_read(regmap, SII902X_SYS_CTRL_DATA,
-				  &status);
-		retries--;
-	} while (ret && retries);
-	if (ret)
-		dev_err(dev, "failed to read status (%d)\n", ret);
-
-	ret = regmap_update_bits(regmap, SII902X_SYS_CTRL_DATA,
-				 SII902X_SYS_CTRL_DDC_BUS_REQ |
-				 SII902X_SYS_CTRL_DDC_BUS_GRTD, 0);
-	if (ret)
-		return ret;
-
-	timeout = jiffies +
-		  msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
-	do {
-		ret = regmap_read(regmap, SII902X_SYS_CTRL_DATA, &status);
-		if (ret)
-			return ret;
-	} while (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
-			   SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
-		 time_before(jiffies, timeout));
-
-	if (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
-		      SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
-		dev_err(dev, "failed to release the i2c bus\n");
-		return -ETIMEDOUT;
-	}
-
 	return num;
 }
 
@@ -366,6 +344,121 @@ static irqreturn_t sii902x_interrupt(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
+/*
+ * The purpose of sii902x_i2c_bypass_select is to enable the pass through
+ * mode of the HDMI transmitter. Do not use regmap from within this function,
+ * only use sii902x_*_unlocked functions to read/modify/write registers.
+ * We are holding the parent adapter lock here, keep this in mind before
+ * adding more i2c transactions.
+ *
+ * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere
+ * in this driver, we need to make sure that we only touch 0x1A[2:1] from
+ * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that
+ * we leave the remaining bits as we have found them.
+ */
+static int sii902x_i2c_bypass_select(struct i2c_mux_core *mux, u32 chan_id)
+{
+	struct sii902x *sii902x = i2c_mux_priv(mux);
+	struct device *dev = &sii902x->i2c->dev;
+	unsigned long timeout;
+	u8 status;
+	int ret;
+
+	ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
+					   SII902X_SYS_CTRL_DDC_BUS_REQ,
+					   SII902X_SYS_CTRL_DDC_BUS_REQ);
+	if (ret)
+		return ret;
+
+	timeout = jiffies +
+		  msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
+	do {
+		ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
+					    &status);
+		if (ret)
+			return ret;
+	} while (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
+		 time_before(jiffies, timeout));
+
+	if (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
+		dev_err(dev, "Failed to acquire the i2c bus\n");
+		return -ETIMEDOUT;
+	}
+
+	return sii902x_write_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
+				      status);
+}
+
+/*
+ * The purpose of sii902x_i2c_bypass_deselect is to disable the pass through
+ * mode of the HDMI transmitter. Do not use regmap from within this function,
+ * only use sii902x_*_unlocked functions to read/modify/write registers.
+ * We are holding the parent adapter lock here, keep this in mind before
+ * adding more i2c transactions.
+ *
+ * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere
+ * in this driver, we need to make sure that we only touch 0x1A[2:1] from
+ * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that
+ * we leave the remaining bits as we have found them.
+ */
+static int sii902x_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id)
+{
+	struct sii902x *sii902x = i2c_mux_priv(mux);
+	struct device *dev = &sii902x->i2c->dev;
+	unsigned long timeout;
+	unsigned int retries;
+	u8 status;
+	int ret;
+
+	/*
+	 * When the HDMI transmitter is in pass through mode, we need an
+	 * (undocumented) additional delay between STOP and START conditions
+	 * to guarantee the bus won't get stuck.
+	 */
+	udelay(30);
+
+	/*
+	 * Sometimes the I2C bus can stall after failure to use the
+	 * EDID channel. Retry a few times to see if things clear
+	 * up, else continue anyway.
+	 */
+	retries = 5;
+	do {
+		ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
+					    &status);
+		retries--;
+	} while (ret && retries);
+	if (ret) {
+		dev_err(dev, "failed to read status (%d)\n", ret);
+		return ret;
+	}
+
+	ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
+					   SII902X_SYS_CTRL_DDC_BUS_REQ |
+					   SII902X_SYS_CTRL_DDC_BUS_GRTD, 0);
+	if (ret)
+		return ret;
+
+	timeout = jiffies +
+		  msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
+	do {
+		ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
+					    &status);
+		if (ret)
+			return ret;
+	} while (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
+			   SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
+		 time_before(jiffies, timeout));
+
+	if (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
+		      SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
+		dev_err(dev, "failed to release the i2c bus\n");
+		return -ETIMEDOUT;
+	}
+
+	return 0;
+}
+
 static int sii902x_probe(struct i2c_client *client,
 			 const struct i2c_device_id *id)
 {
@@ -375,6 +468,13 @@ static int sii902x_probe(struct i2c_client *client,
 	u8 chipid[4];
 	int ret;
 
+	ret = i2c_check_functionality(client->adapter,
+				      I2C_FUNC_SMBUS_BYTE_DATA);
+	if (!ret) {
+		dev_err(dev, "I2C adapter not suitable\n");
+		return -EIO;
+	}
+
 	sii902x = devm_kzalloc(dev, sizeof(*sii902x), GFP_KERNEL);
 	if (!sii902x)
 		return -ENOMEM;
@@ -433,7 +533,15 @@ static int sii902x_probe(struct i2c_client *client,
 
 	i2c_set_clientdata(client, sii902x);
 
-	return 0;
+	sii902x->i2cmux = i2c_mux_alloc(client->adapter, dev,
+					1, 0, I2C_MUX_GATE,
+					sii902x_i2c_bypass_select,
+					sii902x_i2c_bypass_deselect);
+	if (!sii902x->i2cmux)
+		return -ENOMEM;
+
+	sii902x->i2cmux->priv = sii902x;
+	return i2c_mux_add_adapter(sii902x->i2cmux, 0, 0, 0);
 }
 
 static int sii902x_remove(struct i2c_client *client)
@@ -441,6 +549,7 @@ static int sii902x_remove(struct i2c_client *client)
 {
 	struct sii902x *sii902x = i2c_get_clientdata(client);
 
+	i2c_mux_del_adapters(sii902x->i2cmux);
 	drm_bridge_remove(&sii902x->bridge);
 
 	return 0;
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 5971976284bf..64c3cf027518 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1664,6 +1664,7 @@ static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi)
 	case 0x131a:
 	case 0x132a:
 	case 0x201a:
+	case 0x212a:
 		count = 1;
 		break;
 	default:
@@ -1957,7 +1958,6 @@ static const struct drm_connector_funcs dw_hdmi_connector_funcs = {
 
 static const struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs = {
 	.get_modes = dw_hdmi_connector_get_modes,
-	.best_encoder = drm_atomic_helper_best_encoder,
 };
 
 static int dw_hdmi_bridge_attach(struct drm_bridge *bridge)
@@ -2205,7 +2205,9 @@ static int dw_hdmi_detect_phy(struct dw_hdmi *hdmi)
 	unsigned int i;
 	u8 phy_type;
 
-	phy_type = hdmi_readb(hdmi, HDMI_CONFIG2_ID);
+	phy_type = hdmi->plat_data->phy_force_vendor ?
+				DW_HDMI_PHY_VENDOR_PHY :
+				hdmi_readb(hdmi, HDMI_CONFIG2_ID);
 
 	if (phy_type == DW_HDMI_PHY_VENDOR_PHY) {
 		/* Vendor PHYs require support from the glue layer. */
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
index fd7999642cf8..2f4b145b73af 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
@@ -230,10 +230,21 @@ struct dw_mipi_dsi {
 	u32 format;
 	unsigned long mode_flags;
 
+	struct dw_mipi_dsi *master; /* dual-dsi master ptr */
+	struct dw_mipi_dsi *slave; /* dual-dsi slave ptr */
+
 	const struct dw_mipi_dsi_plat_data *plat_data;
 };
 
 /*
+ * Check if either a link to a master or slave is present
+ */
+static inline bool dw_mipi_is_dual_mode(struct dw_mipi_dsi *dsi)
+{
+	return dsi->slave || dsi->master;
+}
+
+/*
  * The controller should generate 2 frames before
  * preparing the peripheral.
  */
@@ -270,6 +281,7 @@ static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
 				   struct mipi_dsi_device *device)
 {
 	struct dw_mipi_dsi *dsi = host_to_dsi(host);
+	const struct dw_mipi_dsi_plat_data *pdata = dsi->plat_data;
 	struct drm_bridge *bridge;
 	struct drm_panel *panel;
 	int ret;
@@ -300,6 +312,12 @@ static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
 
 	drm_bridge_add(&dsi->bridge);
 
+	if (pdata->host_ops && pdata->host_ops->attach) {
+		ret = pdata->host_ops->attach(pdata->priv_data, device);
+		if (ret < 0)
+			return ret;
+	}
+
 	return 0;
 }
 
@@ -307,6 +325,14 @@ static int dw_mipi_dsi_host_detach(struct mipi_dsi_host *host,
 				   struct mipi_dsi_device *device)
 {
 	struct dw_mipi_dsi *dsi = host_to_dsi(host);
+	const struct dw_mipi_dsi_plat_data *pdata = dsi->plat_data;
+	int ret;
+
+	if (pdata->host_ops && pdata->host_ops->detach) {
+		ret = pdata->host_ops->detach(pdata->priv_data, device);
+		if (ret < 0)
+			return ret;
+	}
 
 	drm_of_panel_bridge_remove(host->dev->of_node, 1, 0);
 
@@ -441,10 +467,17 @@ static ssize_t dw_mipi_dsi_host_transfer(struct mipi_dsi_host *host,
 	}
 
 	dw_mipi_message_config(dsi, msg);
+	if (dsi->slave)
+		dw_mipi_message_config(dsi->slave, msg);
 
 	ret = dw_mipi_dsi_write(dsi, &packet);
 	if (ret)
 		return ret;
+	if (dsi->slave) {
+		ret = dw_mipi_dsi_write(dsi->slave, &packet);
+		if (ret)
+			return ret;
+	}
 
 	if (msg->rx_buf && msg->rx_len) {
 		ret = dw_mipi_dsi_read(dsi, msg);
@@ -583,7 +616,11 @@ static void dw_mipi_dsi_video_packet_config(struct dw_mipi_dsi *dsi,
 	 * DSI_VNPCR.NPSIZE... especially because this driver supports
 	 * non-burst video modes, see dw_mipi_dsi_video_mode_config()...
 	 */
-	dsi_write(dsi, DSI_VID_PKT_SIZE, VID_PKT_SIZE(mode->hdisplay));
+
+	dsi_write(dsi, DSI_VID_PKT_SIZE,
+		       dw_mipi_is_dual_mode(dsi) ?
+				VID_PKT_SIZE(mode->hdisplay / 2) :
+				VID_PKT_SIZE(mode->hdisplay));
 }
 
 static void dw_mipi_dsi_command_mode_config(struct dw_mipi_dsi *dsi)
@@ -755,24 +792,43 @@ static void dw_mipi_dsi_bridge_post_disable(struct drm_bridge *bridge)
 	 */
 	dsi->panel_bridge->funcs->post_disable(dsi->panel_bridge);
 
+	if (dsi->slave) {
+		dw_mipi_dsi_disable(dsi->slave);
+		clk_disable_unprepare(dsi->slave->pclk);
+		pm_runtime_put(dsi->slave->dev);
+	}
 	dw_mipi_dsi_disable(dsi);
+
 	clk_disable_unprepare(dsi->pclk);
 	pm_runtime_put(dsi->dev);
 }
 
-static void dw_mipi_dsi_bridge_mode_set(struct drm_bridge *bridge,
-					struct drm_display_mode *mode,
-					struct drm_display_mode *adjusted_mode)
+static unsigned int dw_mipi_dsi_get_lanes(struct dw_mipi_dsi *dsi)
+{
+	/* this instance is the slave, so add the master's lanes */
+	if (dsi->master)
+		return dsi->master->lanes + dsi->lanes;
+
+	/* this instance is the master, so add the slave's lanes */
+	if (dsi->slave)
+		return dsi->lanes + dsi->slave->lanes;
+
+	/* single-dsi, so no other instance to consider */
+	return dsi->lanes;
+}
+
+static void dw_mipi_dsi_mode_set(struct dw_mipi_dsi *dsi,
+				struct drm_display_mode *adjusted_mode)
 {
-	struct dw_mipi_dsi *dsi = bridge_to_dsi(bridge);
 	const struct dw_mipi_dsi_phy_ops *phy_ops = dsi->plat_data->phy_ops;
 	void *priv_data = dsi->plat_data->priv_data;
 	int ret;
+	u32 lanes = dw_mipi_dsi_get_lanes(dsi);
 
 	clk_prepare_enable(dsi->pclk);
 
 	ret = phy_ops->get_lane_mbps(priv_data, adjusted_mode, dsi->mode_flags,
-				     dsi->lanes, dsi->format, &dsi->lane_mbps);
+				     lanes, dsi->format, &dsi->lane_mbps);
 	if (ret)
 		DRM_DEBUG_DRIVER("Phy get_lane_mbps() failed\n");
 
@@ -804,12 +860,25 @@ static void dw_mipi_dsi_bridge_mode_set(struct drm_bridge *bridge,
 	dw_mipi_dsi_set_mode(dsi, 0);
 }
 
+static void dw_mipi_dsi_bridge_mode_set(struct drm_bridge *bridge,
+					struct drm_display_mode *mode,
+					struct drm_display_mode *adjusted_mode)
+{
+	struct dw_mipi_dsi *dsi = bridge_to_dsi(bridge);
+
+	dw_mipi_dsi_mode_set(dsi, adjusted_mode);
+	if (dsi->slave)
+		dw_mipi_dsi_mode_set(dsi->slave, adjusted_mode);
+}
+
 static void dw_mipi_dsi_bridge_enable(struct drm_bridge *bridge)
 {
 	struct dw_mipi_dsi *dsi = bridge_to_dsi(bridge);
 
 	/* Switch to video mode for panel-bridge enable & panel enable */
 	dw_mipi_dsi_set_mode(dsi, MIPI_DSI_MODE_VIDEO);
+	if (dsi->slave)
+		dw_mipi_dsi_set_mode(dsi->slave, MIPI_DSI_MODE_VIDEO);
 }
 
 static enum drm_mode_status
@@ -941,9 +1010,25 @@ __dw_mipi_dsi_probe(struct platform_device *pdev,
 
 static void __dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi)
 {
+	mipi_dsi_host_unregister(&dsi->dsi_host);
+
 	pm_runtime_disable(dsi->dev);
 }
 
+void dw_mipi_dsi_set_slave(struct dw_mipi_dsi *dsi, struct dw_mipi_dsi *slave)
+{
+	/* introduce controllers to each other */
+	dsi->slave = slave;
+	dsi->slave->master = dsi;
+
+	/* migrate settings for already attached displays */
+	dsi->slave->lanes = dsi->lanes;
+	dsi->slave->channel = dsi->channel;
+	dsi->slave->format = dsi->format;
+	dsi->slave->mode_flags = dsi->mode_flags;
+}
+EXPORT_SYMBOL_GPL(dw_mipi_dsi_set_slave);
+
 /*
  * Probe/remove API, used from platforms based on the DRM bridge API.
  */
@@ -957,8 +1042,6 @@ EXPORT_SYMBOL_GPL(dw_mipi_dsi_probe);
 
 void dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi)
 {
-	mipi_dsi_host_unregister(&dsi->dsi_host);
-
 	__dw_mipi_dsi_remove(dsi);
 }
 EXPORT_SYMBOL_GPL(dw_mipi_dsi_remove);
@@ -966,31 +1049,22 @@ EXPORT_SYMBOL_GPL(dw_mipi_dsi_remove);
 /*
  * Bind/unbind API, used from platforms based on the component framework.
  */
-struct dw_mipi_dsi *
-dw_mipi_dsi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
-		 const struct dw_mipi_dsi_plat_data *plat_data)
+int dw_mipi_dsi_bind(struct dw_mipi_dsi *dsi, struct drm_encoder *encoder)
 {
-	struct dw_mipi_dsi *dsi;
 	int ret;
 
-	dsi = __dw_mipi_dsi_probe(pdev, plat_data);
-	if (IS_ERR(dsi))
-		return dsi;
-
 	ret = drm_bridge_attach(encoder, &dsi->bridge, NULL);
 	if (ret) {
-		dw_mipi_dsi_remove(dsi);
 		DRM_ERROR("Failed to initialize bridge with drm\n");
-		return ERR_PTR(ret);
+		return ret;
 	}
 
-	return dsi;
+	return ret;
 }
 EXPORT_SYMBOL_GPL(dw_mipi_dsi_bind);
 
 void dw_mipi_dsi_unbind(struct dw_mipi_dsi *dsi)
 {
-	__dw_mipi_dsi_remove(dsi);
 }
 EXPORT_SYMBOL_GPL(dw_mipi_dsi_unbind);
 
diff --git a/drivers/gpu/drm/bridge/tc358764.c b/drivers/gpu/drm/bridge/tc358764.c
index ee6b98efa9c2..afd491018bfc 100644
--- a/drivers/gpu/drm/bridge/tc358764.c
+++ b/drivers/gpu/drm/bridge/tc358764.c
@@ -379,7 +379,7 @@ static void tc358764_detach(struct drm_bridge *bridge)
 	drm_fb_helper_remove_one_connector(drm->fb_helper, &ctx->connector);
 	drm_panel_detach(ctx->panel);
 	ctx->panel = NULL;
-	drm_connector_unreference(&ctx->connector);
+	drm_connector_put(&ctx->connector);
 }
 
 static const struct drm_bridge_funcs tc358764_bridge_funcs = {