Merge tag 'drm/panel/for-3.20-rc1' of git://anongit.freedesktop.org/tegra/linux into drm-next

drm/panel: Changes for v3.20-rc1

This contains the long-awaited drm_bridge series that makes Chromebooks
work for people. I had thought this would've been perfect by now, but
then I go and build test it and the first thing it does is yell about a
recursive dependency. I fixed that up because I was feeling bad for not
getting around to look at this earlier.

Biseds that there is new support for two more panels, a couple of fixup
patches to the Sharp LQ101R1SX01 dual-channel DSI panel driver and a
potential NULL pointer dereference fix.

* tag 'drm/panel/for-3.20-rc1' of git://anongit.freedesktop.org/tegra/linux: (23 commits)
  drm/bridge: dw-hdmi: Adapt to bridge API change
  drm/sti: fixup for bridge interface
  drm/bridge: dw-hdmi: Fix return error path
  drm: Check the right variable when setting formats
  Documentation: bridge: Add documentation for ps8622 DT properties
  Documentation: devicetree: Add vendor prefix for parade
  Documentation: drm: bridge: move to video/bridge
  drm/bridge: ptn3460: use gpiod interface
  drm/bridge: ptn3460: probe connector at the end of bridge attach
  drm/bridge: ptn3460: support drm_panel
  drm/exynos: dp: support drm_bridge
  drm/bridge: ptn3460: Convert to I2C driver model
  drm/bridge: make bridge registration independent of drm flow
  drm/bridge: do not pass drm_bridge_funcs to drm_bridge_init
  drm/bridge: ptn3460: Few trivial cleanups
  drm/panel: simple: Add AVIC TM070DDH03 panel support
  of: Add vendor prefix for Shanghai AVIC Optoelectronics Co., Ltd.
  drm/panel: sharp: lq101r1sx01: Remove unneeded include
  drm/panel: sharp: lq101r1sx01: Respect power timings
  drm/panel: sharp: lq101r1sx01: Add delay after display on
  ...

Documentation/devicetree/bindings/panel/avic,tm070ddh03.txt

@@ -0,0 +1,7 @@
+Shanghai AVIC Optoelectronics 7" 1024x600 color TFT-LCD panel
+
+Required properties:
+- compatible: should be "avic,tm070ddh03"
+
+This binding is compatible with the simple-panel binding, which is specified
+in simple-panel.txt in this directory.

Documentation/devicetree/bindings/panel/giantplus,gpg482739qs5.txt

@@ -0,0 +1,7 @@
+GiantPlus GPG48273QS5 4.3" (480x272) WQVGA TFT LCD panel
+
+Required properties:
+- compatible: should be "giantplus,gpg48273qs5"
+
+This binding is compatible with the simple-panel binding, which is specified
+in simple-panel.txt in this directory.

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -23,6 +23,7 @@ armadeus	ARMadeus Systems SARL
 atmel	Atmel Corporation
 auo	AU Optronics Corporation
 avago	Avago Technologies
+avic	Shanghai AVIC Optoelectronics Co., Ltd.
 bosch	Bosch Sensortec GmbH
 brcm	Broadcom Corporation
 buffalo	Buffalo, Inc.
@@ -62,6 +63,7 @@ fsl	Freescale Semiconductor
 GEFanuc	GE Fanuc Intelligent Platforms Embedded Systems, Inc.
 gef	GE Fanuc Intelligent Platforms Embedded Systems, Inc.
 geniatech	Geniatech, Inc.
+giantplus	Giantplus Technology Co., Ltd.
 globalscale	Globalscale Technologies, Inc.
 gmt	Global Mixed-mode Technology, Inc.
 google	Google, Inc.
@@ -119,6 +121,7 @@ nxp	NXP Semiconductors
 onnn	ON Semiconductor Corp.
 opencores	OpenCores.org
 panasonic	Panasonic Corporation
+parade	Parade Technologies Inc.
 pericom	Pericom Technology Inc.
 phytec	PHYTEC Messtechnik GmbH
 picochip	Picochip Ltd

Documentation/devicetree/bindings/video/bridge/ps8622.txt

@@ -0,0 +1,31 @@
+ps8622-bridge bindings
+
+Required properties:
+	- compatible: "parade,ps8622" or "parade,ps8625"
+	- reg: first i2c address of the bridge
+	- sleep-gpios: OF device-tree gpio specification for PD_ pin.
+	- reset-gpios: OF device-tree gpio specification for RST_ pin.
+
+Optional properties:
+	- lane-count: number of DP lanes to use
+	- use-external-pwm: backlight will be controlled by an external PWM
+	- video interfaces: Device node can contain video interface port
+			    nodes for panel according to [1].
+
+[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
+
+Example:
+	lvds-bridge@48 {
+		compatible = "parade,ps8622";
+		reg = <0x48>;
+		sleep-gpios = <&gpc3 6 1 0 0>;
+		reset-gpios = <&gpc3 1 1 0 0>;
+		lane-count = <1>;
+		ports {
+			port@0 {
+				bridge_out: endpoint {
+					remote-endpoint = <&panel_in>;
+				};
+			};
+		};
+	};

Documentation/devicetree/bindings/drm/bridge/ptn3460.txt → Documentation/devicetree/bindings/video/bridge/ptn3460.txt

@@ -3,8 +3,8 @@ ptn3460 bridge bindings
 Required properties:
 	- compatible: "nxp,ptn3460"
 	- reg: i2c address of the bridge
-	- powerdown-gpio: OF device-tree gpio specification
-	- reset-gpio: OF device-tree gpio specification
+	- powerdown-gpio: OF device-tree gpio specification  for PD_N pin.
+	- reset-gpio: OF device-tree gpio specification for RST_N pin.
 	- edid-emulation: The EDID emulation entry to use
 		+-------+------------+------------------+
 		| Value | Resolution | Description      |
@@ -17,6 +17,11 @@ Required properties:
 		|   6   |  1600x900  | ChiMei M215HGE   |
 		+-------+------------+------------------+
 
+	- video interfaces: Device node can contain video interface port
+			    nodes for panel according to [1].
+
+[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
+
 Example:
 	lvds-bridge@20 {
 		compatible = "nxp,ptn3460";
@@ -24,4 +29,11 @@ Example:
 		powerdown-gpio = <&gpy2 5 1 0 0>;
 		reset-gpio = <&gpx1 5 1 0 0>;
 		edid-emulation = <5>;
+		ports {
+			port@0 {
+				bridge_out: endpoint {
+					remote-endpoint = <&panel_in>;
+				};
+			};
+		};
 	};

Documentation/devicetree/bindings/video/exynos_dp.txt

@@ -66,6 +66,10 @@ Optional properties for dp-controller:
 		Hotplug detect GPIO.
 			Indicates which GPIO should be used for hotplug
 			detection
+	-video interfaces: Device node can contain video interface port
+			    nodes according to [1].
+
+[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
 
 Example:
 
@@ -105,4 +109,12 @@ Board Specific portion:
 				vsync-len = <6>;
 			};
 		};
+
+		ports {
+			port@0 {
+				dp_out: endpoint {
+					remote-endpoint = <&bridge_in>;
+				};
+			};
+		};
 	};

drivers/gpu/drm/Makefile

@@ -14,7 +14,7 @@ drm-y       :=	drm_auth.o drm_bufs.o drm_cache.o \
 		drm_info.o drm_debugfs.o drm_encoder_slave.o \
 		drm_trace_points.o drm_global.o drm_prime.o \
 		drm_rect.o drm_vma_manager.o drm_flip_work.o \
-		drm_modeset_lock.o drm_atomic.o
+		drm_modeset_lock.o drm_atomic.o drm_bridge.o
 
 drm-$(CONFIG_COMPAT) += drm_ioc32.o
 drm-$(CONFIG_DRM_GEM_CMA_HELPER) += drm_gem_cma_helper.o

drivers/gpu/drm/bridge/Kconfig

@@ -1,10 +1,13 @@
-config DRM_PTN3460
-	tristate "PTN3460 DP/LVDS bridge"
+config DRM_DW_HDMI
+	tristate
 	depends on DRM
 	select DRM_KMS_HELPER
-	---help---
 
-config DRM_DW_HDMI
-	tristate
+config DRM_PTN3460
+	tristate "PTN3460 DP/LVDS bridge"
 	depends on DRM
+	depends on OF
 	select DRM_KMS_HELPER
+	select DRM_PANEL
+	---help---
+	  ptn3460 eDP-LVDS bridge chip driver.

drivers/gpu/drm/bridge/dw_hdmi.c

@@ -1373,12 +1373,6 @@ static void dw_hdmi_bridge_enable(struct drm_bridge *bridge)
 	dw_hdmi_poweron(hdmi);
 }
 
-static void dw_hdmi_bridge_destroy(struct drm_bridge *bridge)
-{
-	drm_bridge_cleanup(bridge);
-	kfree(bridge);
-}
-
 static void dw_hdmi_bridge_nop(struct drm_bridge *bridge)
 {
 	/* do nothing */
@@ -1468,7 +1462,6 @@ struct drm_bridge_funcs dw_hdmi_bridge_funcs = {
 	.post_disable = dw_hdmi_bridge_nop,
 	.mode_set = dw_hdmi_bridge_mode_set,
 	.mode_fixup = dw_hdmi_bridge_mode_fixup,
-	.destroy = dw_hdmi_bridge_destroy,
 };
 
 static irqreturn_t dw_hdmi_hardirq(int irq, void *dev_id)
@@ -1531,8 +1524,8 @@ static int dw_hdmi_register(struct drm_device *drm, struct dw_hdmi *hdmi)
 
 	hdmi->bridge = bridge;
 	bridge->driver_private = hdmi;
-
-	ret = drm_bridge_init(drm, bridge, &dw_hdmi_bridge_funcs);
+	bridge->funcs = &dw_hdmi_bridge_funcs;
+	ret = drm_bridge_attach(drm, bridge);
 	if (ret) {
 		DRM_ERROR("Failed to initialize bridge with drm\n");
 		return -EINVAL;
@@ -1649,7 +1642,7 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
 					dw_hdmi_irq, IRQF_SHARED,
 					dev_name(dev), hdmi);
 	if (ret)
-		return ret;
+		goto err_iahb;
 
 	/*
 	 * To prevent overflows in HDMI_IH_FC_STAT2, set the clk regenerator

drivers/gpu/drm/bridge/ptn3460.c

@@ -13,20 +13,23 @@
  * GNU General Public License for more details.
  */
 
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>
-#include <linux/i2c.h>
-#include <linux/gpio.h>
-#include <linux/delay.h>
+#include <linux/of_graph.h>
 
-#include "drmP.h"
-#include "drm_edid.h"
-#include "drm_crtc.h"
-#include "drm_crtc_helper.h"
+#include <drm/drm_panel.h>
 
 #include "bridge/ptn3460.h"
 
+#include "drm_crtc.h"
+#include "drm_crtc_helper.h"
+#include "drm_edid.h"
+#include "drmP.h"
+
 #define PTN3460_EDID_ADDR			0x0
 #define PTN3460_EDID_EMULATION_ADDR		0x84
 #define PTN3460_EDID_ENABLE_EMULATION		0
@@ -36,15 +39,27 @@
 struct ptn3460_bridge {
 	struct drm_connector connector;
 	struct i2c_client *client;
-	struct drm_encoder *encoder;
-	struct drm_bridge *bridge;
+	struct drm_bridge bridge;
 	struct edid *edid;
-	int gpio_pd_n;
-	int gpio_rst_n;
+	struct drm_panel *panel;
+	struct gpio_desc *gpio_pd_n;
+	struct gpio_desc *gpio_rst_n;
 	u32 edid_emulation;
 	bool enabled;
 };
 
+static inline struct ptn3460_bridge *
+		bridge_to_ptn3460(struct drm_bridge *bridge)
+{
+	return container_of(bridge, struct ptn3460_bridge, bridge);
+}
+
+static inline struct ptn3460_bridge *
+		connector_to_ptn3460(struct drm_connector *connector)
+{
+	return container_of(connector, struct ptn3460_bridge, connector);
+}
+
 static int ptn3460_read_bytes(struct ptn3460_bridge *ptn_bridge, char addr,
 		u8 *buf, int len)
 {
@@ -92,7 +107,7 @@ static int ptn3460_select_edid(struct ptn3460_bridge *ptn_bridge)
 	ret = ptn3460_write_byte(ptn_bridge, PTN3460_EDID_SRAM_LOAD_ADDR,
 			ptn_bridge->edid_emulation);
 	if (ret) {
-		DRM_ERROR("Failed to transfer edid to sram, ret=%d\n", ret);
+		DRM_ERROR("Failed to transfer EDID to sram, ret=%d\n", ret);
 		return ret;
 	}
 
@@ -102,7 +117,7 @@ static int ptn3460_select_edid(struct ptn3460_bridge *ptn_bridge)
 
 	ret = ptn3460_write_byte(ptn_bridge, PTN3460_EDID_EMULATION_ADDR, val);
 	if (ret) {
-		DRM_ERROR("Failed to write edid value, ret=%d\n", ret);
+		DRM_ERROR("Failed to write EDID value, ret=%d\n", ret);
 		return ret;
 	}
 
@@ -111,19 +126,21 @@ static int ptn3460_select_edid(struct ptn3460_bridge *ptn_bridge)
 
 static void ptn3460_pre_enable(struct drm_bridge *bridge)
 {
-	struct ptn3460_bridge *ptn_bridge = bridge->driver_private;
+	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
 	int ret;
 
 	if (ptn_bridge->enabled)
 		return;
 
-	if (gpio_is_valid(ptn_bridge->gpio_pd_n))
-		gpio_set_value(ptn_bridge->gpio_pd_n, 1);
+	gpiod_set_value(ptn_bridge->gpio_pd_n, 1);
+
+	gpiod_set_value(ptn_bridge->gpio_rst_n, 0);
+	usleep_range(10, 20);
+	gpiod_set_value(ptn_bridge->gpio_rst_n, 1);
 
-	if (gpio_is_valid(ptn_bridge->gpio_rst_n)) {
-		gpio_set_value(ptn_bridge->gpio_rst_n, 0);
-		udelay(10);
-		gpio_set_value(ptn_bridge->gpio_rst_n, 1);
+	if (drm_panel_prepare(ptn_bridge->panel)) {
+		DRM_ERROR("failed to prepare panel\n");
+		return;
 	}
 
 	/*
@@ -135,73 +152,67 @@ static void ptn3460_pre_enable(struct drm_bridge *bridge)
 
 	ret = ptn3460_select_edid(ptn_bridge);
 	if (ret)
-		DRM_ERROR("Select edid failed ret=%d\n", ret);
+		DRM_ERROR("Select EDID failed ret=%d\n", ret);
 
 	ptn_bridge->enabled = true;
 }
 
 static void ptn3460_enable(struct drm_bridge *bridge)
 {
+	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
+
+	if (drm_panel_enable(ptn_bridge->panel)) {
+		DRM_ERROR("failed to enable panel\n");
+		return;
+	}
 }
 
 static void ptn3460_disable(struct drm_bridge *bridge)
 {
-	struct ptn3460_bridge *ptn_bridge = bridge->driver_private;
+	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
 
 	if (!ptn_bridge->enabled)
 		return;
 
 	ptn_bridge->enabled = false;
 
-	if (gpio_is_valid(ptn_bridge->gpio_rst_n))
-		gpio_set_value(ptn_bridge->gpio_rst_n, 1);
+	if (drm_panel_disable(ptn_bridge->panel)) {
+		DRM_ERROR("failed to disable panel\n");
+		return;
+	}
 
-	if (gpio_is_valid(ptn_bridge->gpio_pd_n))
-		gpio_set_value(ptn_bridge->gpio_pd_n, 0);
+	gpiod_set_value(ptn_bridge->gpio_rst_n, 1);
+	gpiod_set_value(ptn_bridge->gpio_pd_n, 0);
 }
 
 static void ptn3460_post_disable(struct drm_bridge *bridge)
 {
-}
+	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
 
-void ptn3460_bridge_destroy(struct drm_bridge *bridge)
-{
-	struct ptn3460_bridge *ptn_bridge = bridge->driver_private;
-
-	drm_bridge_cleanup(bridge);
-	if (gpio_is_valid(ptn_bridge->gpio_pd_n))
-		gpio_free(ptn_bridge->gpio_pd_n);
-	if (gpio_is_valid(ptn_bridge->gpio_rst_n))
-		gpio_free(ptn_bridge->gpio_rst_n);
-	/* Nothing else to free, we've got devm allocated memory */
+	if (drm_panel_unprepare(ptn_bridge->panel)) {
+		DRM_ERROR("failed to unprepare panel\n");
+		return;
+	}
 }
 
-struct drm_bridge_funcs ptn3460_bridge_funcs = {
-	.pre_enable = ptn3460_pre_enable,
-	.enable = ptn3460_enable,
-	.disable = ptn3460_disable,
-	.post_disable = ptn3460_post_disable,
-	.destroy = ptn3460_bridge_destroy,
-};
-
-int ptn3460_get_modes(struct drm_connector *connector)
+static int ptn3460_get_modes(struct drm_connector *connector)
 {
 	struct ptn3460_bridge *ptn_bridge;
 	u8 *edid;
-	int ret, num_modes;
+	int ret, num_modes = 0;
 	bool power_off;
 
-	ptn_bridge = container_of(connector, struct ptn3460_bridge, connector);
+	ptn_bridge = connector_to_ptn3460(connector);
 
 	if (ptn_bridge->edid)
 		return drm_add_edid_modes(connector, ptn_bridge->edid);
 
 	power_off = !ptn_bridge->enabled;
-	ptn3460_pre_enable(ptn_bridge->bridge);
+	ptn3460_pre_enable(&ptn_bridge->bridge);
 
 	edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
 	if (!edid) {
-		DRM_ERROR("Failed to allocate edid\n");
+		DRM_ERROR("Failed to allocate EDID\n");
 		return 0;
 	}
 
@@ -209,7 +220,6 @@ int ptn3460_get_modes(struct drm_connector *connector)
 			EDID_LENGTH);
 	if (ret) {
 		kfree(edid);
-		num_modes = 0;
 		goto out;
 	}
 
@@ -220,124 +230,188 @@ int ptn3460_get_modes(struct drm_connector *connector)
 
 out:
 	if (power_off)
-		ptn3460_disable(ptn_bridge->bridge);
+		ptn3460_disable(&ptn_bridge->bridge);
 
 	return num_modes;
 }
 
-struct drm_encoder *ptn3460_best_encoder(struct drm_connector *connector)
+static struct drm_encoder *ptn3460_best_encoder(struct drm_connector *connector)
 {
-	struct ptn3460_bridge *ptn_bridge;
-
-	ptn_bridge = container_of(connector, struct ptn3460_bridge, connector);
+	struct ptn3460_bridge *ptn_bridge = connector_to_ptn3460(connector);
 
-	return ptn_bridge->encoder;
+	return ptn_bridge->bridge.encoder;
 }
 
-struct drm_connector_helper_funcs ptn3460_connector_helper_funcs = {
+static struct drm_connector_helper_funcs ptn3460_connector_helper_funcs = {
 	.get_modes = ptn3460_get_modes,
 	.best_encoder = ptn3460_best_encoder,
 };
 
-enum drm_connector_status ptn3460_detect(struct drm_connector *connector,
+static enum drm_connector_status ptn3460_detect(struct drm_connector *connector,
 		bool force)
 {
 	return connector_status_connected;
 }
 
-void ptn3460_connector_destroy(struct drm_connector *connector)
+static void ptn3460_connector_destroy(struct drm_connector *connector)
 {
 	drm_connector_cleanup(connector);
 }
 
-struct drm_connector_funcs ptn3460_connector_funcs = {
+static struct drm_connector_funcs ptn3460_connector_funcs = {
 	.dpms = drm_helper_connector_dpms,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.detect = ptn3460_detect,
 	.destroy = ptn3460_connector_destroy,
 };
 
-int ptn3460_init(struct drm_device *dev, struct drm_encoder *encoder,
-		struct i2c_client *client, struct device_node *node)
+int ptn3460_bridge_attach(struct drm_bridge *bridge)
 {
+	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
 	int ret;
-	struct drm_bridge *bridge;
-	struct ptn3460_bridge *ptn_bridge;
 
-	bridge = devm_kzalloc(dev->dev, sizeof(*bridge), GFP_KERNEL);
-	if (!bridge) {
-		DRM_ERROR("Failed to allocate drm bridge\n");
-		return -ENOMEM;
+	if (!bridge->encoder) {
+		DRM_ERROR("Parent encoder object not found");
+		return -ENODEV;
+	}
+
+	ptn_bridge->connector.polled = DRM_CONNECTOR_POLL_HPD;
+	ret = drm_connector_init(bridge->dev, &ptn_bridge->connector,
+			&ptn3460_connector_funcs, DRM_MODE_CONNECTOR_LVDS);
+	if (ret) {
+		DRM_ERROR("Failed to initialize connector with drm\n");
+		return ret;
 	}
+	drm_connector_helper_add(&ptn_bridge->connector,
+					&ptn3460_connector_helper_funcs);
+	drm_connector_register(&ptn_bridge->connector);
+	drm_mode_connector_attach_encoder(&ptn_bridge->connector,
+							bridge->encoder);
 
-	ptn_bridge = devm_kzalloc(dev->dev, sizeof(*ptn_bridge), GFP_KERNEL);
+	if (ptn_bridge->panel)
+		drm_panel_attach(ptn_bridge->panel, &ptn_bridge->connector);
+
+	drm_helper_hpd_irq_event(ptn_bridge->connector.dev);
+
+	return ret;
+}
+
+static struct drm_bridge_funcs ptn3460_bridge_funcs = {
+	.pre_enable = ptn3460_pre_enable,
+	.enable = ptn3460_enable,
+	.disable = ptn3460_disable,
+	.post_disable = ptn3460_post_disable,
+	.attach = ptn3460_bridge_attach,
+};
+
+static int ptn3460_probe(struct i2c_client *client,
+				const struct i2c_device_id *id)
+{
+	struct device *dev = &client->dev;
+	struct ptn3460_bridge *ptn_bridge;
+	struct device_node *endpoint, *panel_node;
+	int ret;
+
+	ptn_bridge = devm_kzalloc(dev, sizeof(*ptn_bridge), GFP_KERNEL);
 	if (!ptn_bridge) {
-		DRM_ERROR("Failed to allocate ptn bridge\n");
 		return -ENOMEM;
 	}
 
-	ptn_bridge->client = client;
-	ptn_bridge->encoder = encoder;
-	ptn_bridge->bridge = bridge;
-	ptn_bridge->gpio_pd_n = of_get_named_gpio(node, "powerdown-gpio", 0);
-	if (gpio_is_valid(ptn_bridge->gpio_pd_n)) {
-		ret = gpio_request_one(ptn_bridge->gpio_pd_n,
-				GPIOF_OUT_INIT_HIGH, "PTN3460_PD_N");
-		if (ret) {
-			DRM_ERROR("Request powerdown-gpio failed (%d)\n", ret);
-			return ret;
+	endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
+	if (endpoint) {
+		panel_node = of_graph_get_remote_port_parent(endpoint);
+		if (panel_node) {
+			ptn_bridge->panel = of_drm_find_panel(panel_node);
+			of_node_put(panel_node);
+			if (!ptn_bridge->panel)
+				return -EPROBE_DEFER;
 		}
 	}
 
-	ptn_bridge->gpio_rst_n = of_get_named_gpio(node, "reset-gpio", 0);
-	if (gpio_is_valid(ptn_bridge->gpio_rst_n)) {
-		/*
-		 * Request the reset pin low to avoid the bridge being
-		 * initialized prematurely
-		 */
-		ret = gpio_request_one(ptn_bridge->gpio_rst_n,
-				GPIOF_OUT_INIT_LOW, "PTN3460_RST_N");
-		if (ret) {
-			DRM_ERROR("Request reset-gpio failed (%d)\n", ret);
-			gpio_free(ptn_bridge->gpio_pd_n);
-			return ret;
-		}
+	ptn_bridge->client = client;
+
+	ptn_bridge->gpio_pd_n = devm_gpiod_get(&client->dev, "powerdown");
+	if (IS_ERR(ptn_bridge->gpio_pd_n)) {
+		ret = PTR_ERR(ptn_bridge->gpio_pd_n);
+		dev_err(dev, "cannot get gpio_pd_n %d\n", ret);
+		return ret;
 	}
 
-	ret = of_property_read_u32(node, "edid-emulation",
-			&ptn_bridge->edid_emulation);
+	ret = gpiod_direction_output(ptn_bridge->gpio_pd_n, 1);
 	if (ret) {
-		DRM_ERROR("Can't read edid emulation value\n");
-		goto err;
+		DRM_ERROR("cannot configure gpio_pd_n\n");
+		return ret;
 	}
 
-	ret = drm_bridge_init(dev, bridge, &ptn3460_bridge_funcs);
+	ptn_bridge->gpio_rst_n = devm_gpiod_get(&client->dev, "reset");
+	if (IS_ERR(ptn_bridge->gpio_rst_n)) {
+		ret = PTR_ERR(ptn_bridge->gpio_rst_n);
+		DRM_ERROR("cannot get gpio_rst_n %d\n", ret);
+		return ret;
+	}
+	/*
+	 * Request the reset pin low to avoid the bridge being
+	 * initialized prematurely
+	 */
+	ret = gpiod_direction_output(ptn_bridge->gpio_rst_n, 0);
 	if (ret) {
-		DRM_ERROR("Failed to initialize bridge with drm\n");
-		goto err;
+		DRM_ERROR("cannot configure gpio_rst_n\n");
+		return ret;
 	}
 
-	bridge->driver_private = ptn_bridge;
-	encoder->bridge = bridge;
+	ret = of_property_read_u32(dev->of_node, "edid-emulation",
+			&ptn_bridge->edid_emulation);
+	if (ret) {
+		dev_err(dev, "Can't read EDID emulation value\n");
+		return ret;
+	}
 
-	ret = drm_connector_init(dev, &ptn_bridge->connector,
-			&ptn3460_connector_funcs, DRM_MODE_CONNECTOR_LVDS);
+	ptn_bridge->bridge.funcs = &ptn3460_bridge_funcs;
+	ptn_bridge->bridge.of_node = dev->of_node;
+	ret = drm_bridge_add(&ptn_bridge->bridge);
 	if (ret) {
-		DRM_ERROR("Failed to initialize connector with drm\n");
-		goto err;
+		DRM_ERROR("Failed to add bridge\n");
+		return ret;
 	}
-	drm_connector_helper_add(&ptn_bridge->connector,
-			&ptn3460_connector_helper_funcs);
-	drm_connector_register(&ptn_bridge->connector);
-	drm_mode_connector_attach_encoder(&ptn_bridge->connector, encoder);
+
+	i2c_set_clientdata(client, ptn_bridge);
 
 	return 0;
+}
 
-err:
-	if (gpio_is_valid(ptn_bridge->gpio_pd_n))
-		gpio_free(ptn_bridge->gpio_pd_n);
-	if (gpio_is_valid(ptn_bridge->gpio_rst_n))
-		gpio_free(ptn_bridge->gpio_rst_n);
-	return ret;
+static int ptn3460_remove(struct i2c_client *client)
+{
+	struct ptn3460_bridge *ptn_bridge = i2c_get_clientdata(client);
+
+	drm_bridge_remove(&ptn_bridge->bridge);
+
+	return 0;
 }
-EXPORT_SYMBOL(ptn3460_init);
+
+static const struct i2c_device_id ptn3460_i2c_table[] = {
+	{"nxp,ptn3460", 0},
+	{},
+};
+MODULE_DEVICE_TABLE(i2c, ptn3460_i2c_table);
+
+static const struct of_device_id ptn3460_match[] = {
+	{ .compatible = "nxp,ptn3460" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, ptn3460_match);
+
+static struct i2c_driver ptn3460_driver = {
+	.id_table	= ptn3460_i2c_table,
+	.probe		= ptn3460_probe,
+	.remove		= ptn3460_remove,
+	.driver		= {
+		.name	= "nxp,ptn3460",
+		.owner	= THIS_MODULE,
+		.of_match_table = ptn3460_match,
+	},
+};
+module_i2c_driver(ptn3460_driver);
+
+MODULE_AUTHOR("Sean Paul <seanpaul@chromium.org>");
+MODULE_DESCRIPTION("NXP ptn3460 eDP-LVDS converter driver");
+MODULE_LICENSE("GPL v2");

drivers/gpu/drm/drm_bridge.c

@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sub license,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 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/err.h>
+#include <linux/module.h>
+
+#include <drm/drm_crtc.h>
+
+#include "drm/drmP.h"
+
+static DEFINE_MUTEX(bridge_lock);
+static LIST_HEAD(bridge_list);
+
+int drm_bridge_add(struct drm_bridge *bridge)
+{
+	mutex_lock(&bridge_lock);
+	list_add_tail(&bridge->list, &bridge_list);
+	mutex_unlock(&bridge_lock);
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_bridge_add);
+
+void drm_bridge_remove(struct drm_bridge *bridge)
+{
+	mutex_lock(&bridge_lock);
+	list_del_init(&bridge->list);
+	mutex_unlock(&bridge_lock);
+}
+EXPORT_SYMBOL(drm_bridge_remove);
+
+extern int drm_bridge_attach(struct drm_device *dev, struct drm_bridge *bridge)
+{
+	if (!dev || !bridge)
+		return -EINVAL;
+
+	if (bridge->dev)
+		return -EBUSY;
+
+	bridge->dev = dev;
+
+	if (bridge->funcs->attach)
+		return bridge->funcs->attach(bridge);
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_bridge_attach);
+
+#ifdef CONFIG_OF
+struct drm_bridge *of_drm_find_bridge(struct device_node *np)
+{
+	struct drm_bridge *bridge;
+
+	mutex_lock(&bridge_lock);
+
+	list_for_each_entry(bridge, &bridge_list, list) {
+		if (bridge->of_node == np) {
+			mutex_unlock(&bridge_lock);
+			return bridge;
+		}
+	}
+
+	mutex_unlock(&bridge_lock);
+	return NULL;
+}
+EXPORT_SYMBOL(of_drm_find_bridge);
+#endif
+
+MODULE_AUTHOR("Ajay Kumar <ajaykumar.rs@samsung.com>");
+MODULE_DESCRIPTION("DRM bridge infrastructure");
+MODULE_LICENSE("GPL and additional rights");

drivers/gpu/drm/drm_crtc.c

@@ -787,7 +787,7 @@ int drm_display_info_set_bus_formats(struct drm_display_info *info,
 	if (formats && num_formats) {
 		fmts = kmemdup(formats, sizeof(*formats) * num_formats,
 			       GFP_KERNEL);
-		if (!formats)
+		if (!fmts)
 			return -ENOMEM;
 	}
 
@@ -1065,61 +1065,6 @@ void drm_connector_unplug_all(struct drm_device *dev)
 }
 EXPORT_SYMBOL(drm_connector_unplug_all);
 
-/**
- * drm_bridge_init - initialize a drm transcoder/bridge
- * @dev: drm device
- * @bridge: transcoder/bridge to set up
- * @funcs: bridge function table
- *
- * Initialises a preallocated bridge. Bridges should be
- * subclassed as part of driver connector objects.
- *
- * Returns:
- * Zero on success, error code on failure.
- */
-int drm_bridge_init(struct drm_device *dev, struct drm_bridge *bridge,
-		const struct drm_bridge_funcs *funcs)
-{
-	int ret;
-
-	drm_modeset_lock_all(dev);
-
-	ret = drm_mode_object_get(dev, &bridge->base, DRM_MODE_OBJECT_BRIDGE);
-	if (ret)
-		goto out;
-
-	bridge->dev = dev;
-	bridge->funcs = funcs;
-
-	list_add_tail(&bridge->head, &dev->mode_config.bridge_list);
-	dev->mode_config.num_bridge++;
-
- out:
-	drm_modeset_unlock_all(dev);
-	return ret;
-}
-EXPORT_SYMBOL(drm_bridge_init);
-
-/**
- * drm_bridge_cleanup - cleans up an initialised bridge
- * @bridge: bridge to cleanup
- *
- * Cleans up the bridge but doesn't free the object.
- */
-void drm_bridge_cleanup(struct drm_bridge *bridge)
-{
-	struct drm_device *dev = bridge->dev;
-
-	drm_modeset_lock_all(dev);
-	drm_mode_object_put(dev, &bridge->base);
-	list_del(&bridge->head);
-	dev->mode_config.num_bridge--;
-	drm_modeset_unlock_all(dev);
-
-	memset(bridge, 0, sizeof(*bridge));
-}
-EXPORT_SYMBOL(drm_bridge_cleanup);
-
 /**
  * drm_encoder_init - Init a preallocated encoder
  * @dev: drm device
@@ -1715,7 +1660,6 @@ static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *gr
 	total_objects += dev->mode_config.num_crtc;
 	total_objects += dev->mode_config.num_connector;
 	total_objects += dev->mode_config.num_encoder;
-	total_objects += dev->mode_config.num_bridge;
 
 	group->id_list = kcalloc(total_objects, sizeof(uint32_t), GFP_KERNEL);
 	if (!group->id_list)
@@ -1724,7 +1668,6 @@ static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *gr
 	group->num_crtcs = 0;
 	group->num_connectors = 0;
 	group->num_encoders = 0;
-	group->num_bridges = 0;
 	return 0;
 }
 
@@ -1744,7 +1687,6 @@ int drm_mode_group_init_legacy_group(struct drm_device *dev,
 	struct drm_crtc *crtc;
 	struct drm_encoder *encoder;
 	struct drm_connector *connector;
-	struct drm_bridge *bridge;
 	int ret;
 
 	ret = drm_mode_group_init(dev, group);
@@ -1762,11 +1704,6 @@ int drm_mode_group_init_legacy_group(struct drm_device *dev,
 		group->id_list[group->num_crtcs + group->num_encoders +
 			       group->num_connectors++] = connector->base.id;
 
-	list_for_each_entry(bridge, &dev->mode_config.bridge_list, head)
-		group->id_list[group->num_crtcs + group->num_encoders +
-			       group->num_connectors + group->num_bridges++] =
-					bridge->base.id;
-
 	return 0;
 }
 EXPORT_SYMBOL(drm_mode_group_init_legacy_group);
@@ -5443,7 +5380,6 @@ void drm_mode_config_init(struct drm_device *dev)
 	INIT_LIST_HEAD(&dev->mode_config.fb_list);
 	INIT_LIST_HEAD(&dev->mode_config.crtc_list);
 	INIT_LIST_HEAD(&dev->mode_config.connector_list);
-	INIT_LIST_HEAD(&dev->mode_config.bridge_list);
 	INIT_LIST_HEAD(&dev->mode_config.encoder_list);
 	INIT_LIST_HEAD(&dev->mode_config.property_list);
 	INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
@@ -5483,7 +5419,6 @@ void drm_mode_config_cleanup(struct drm_device *dev)
 	struct drm_connector *connector, *ot;
 	struct drm_crtc *crtc, *ct;
 	struct drm_encoder *encoder, *enct;
-	struct drm_bridge *bridge, *brt;
 	struct drm_framebuffer *fb, *fbt;
 	struct drm_property *property, *pt;
 	struct drm_property_blob *blob, *bt;
@@ -5494,11 +5429,6 @@ void drm_mode_config_cleanup(struct drm_device *dev)
 		encoder->funcs->destroy(encoder);
 	}
 
-	list_for_each_entry_safe(bridge, brt,
-				 &dev->mode_config.bridge_list, head) {
-		bridge->funcs->destroy(bridge);
-	}
-
 	list_for_each_entry_safe(connector, ot,
 				 &dev->mode_config.connector_list, head) {
 		connector->funcs->destroy(connector);

drivers/gpu/drm/drm_mipi_dsi.c

@@ -323,8 +323,6 @@ EXPORT_SYMBOL(mipi_dsi_packet_format_is_long);
 int mipi_dsi_create_packet(struct mipi_dsi_packet *packet,
 			   const struct mipi_dsi_msg *msg)
 {
-	const u8 *tx = msg->tx_buf;
-
 	if (!packet || !msg)
 		return -EINVAL;
 
@@ -353,8 +351,10 @@ int mipi_dsi_create_packet(struct mipi_dsi_packet *packet,
 		packet->header[2] = (msg->tx_len >> 8) & 0xff;
 
 		packet->payload_length = msg->tx_len;
-		packet->payload = tx;
+		packet->payload = msg->tx_buf;
 	} else {
+		const u8 *tx = msg->tx_buf;
+
 		packet->header[1] = (msg->tx_len > 0) ? tx[0] : 0;
 		packet->header[2] = (msg->tx_len > 1) ? tx[1] : 0;
 	}

drivers/gpu/drm/exynos/exynos_dp_core.c

@@ -18,6 +18,7 @@
 #include <linux/interrupt.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>
+#include <linux/of_graph.h>
 #include <linux/gpio.h>
 #include <linux/component.h>
 #include <linux/phy/phy.h>
@@ -993,32 +994,20 @@ static struct drm_connector_helper_funcs exynos_dp_connector_helper_funcs = {
 	.best_encoder = exynos_dp_best_encoder,
 };
 
-static bool find_bridge(const char *compat, struct bridge_init *bridge)
-{
-	bridge->client = NULL;
-	bridge->node = of_find_compatible_node(NULL, NULL, compat);
-	if (!bridge->node)
-		return false;
-
-	bridge->client = of_find_i2c_device_by_node(bridge->node);
-	if (!bridge->client)
-		return false;
-
-	return true;
-}
-
 /* returns the number of bridges attached */
-static int exynos_drm_attach_lcd_bridge(struct drm_device *dev,
+static int exynos_drm_attach_lcd_bridge(struct exynos_dp_device *dp,
 		struct drm_encoder *encoder)
 {
-	struct bridge_init bridge;
 	int ret;
 
-	if (find_bridge("nxp,ptn3460", &bridge)) {
-		ret = ptn3460_init(dev, encoder, bridge.client, bridge.node);
-		if (!ret)
-			return 1;
+	encoder->bridge = dp->bridge;
+	dp->bridge->encoder = encoder;
+	ret = drm_bridge_attach(encoder->dev, dp->bridge);
+	if (ret) {
+		DRM_ERROR("Failed to attach bridge to drm\n");
+		return ret;
 	}
+
 	return 0;
 }
 
@@ -1032,9 +1021,11 @@ static int exynos_dp_create_connector(struct exynos_drm_display *display,
 	dp->encoder = encoder;
 
 	/* Pre-empt DP connector creation if there's a bridge */
-	ret = exynos_drm_attach_lcd_bridge(dp->drm_dev, encoder);
-	if (ret)
-		return 0;
+	if (dp->bridge) {
+		ret = exynos_drm_attach_lcd_bridge(dp, encoder);
+		if (!ret)
+			return 0;
+	}
 
 	connector->polled = DRM_CONNECTOR_POLL_HPD;
 
@@ -1241,7 +1232,7 @@ static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
 		}
 	}
 
-	if (!dp->panel) {
+	if (!dp->panel && !dp->bridge) {
 		ret = exynos_dp_dt_parse_panel(dp);
 		if (ret)
 			return ret;
@@ -1325,7 +1316,7 @@ static const struct component_ops exynos_dp_ops = {
 static int exynos_dp_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct device_node *panel_node;
+	struct device_node *panel_node, *bridge_node, *endpoint;
 	struct exynos_dp_device *dp;
 	int ret;
 
@@ -1351,6 +1342,18 @@ static int exynos_dp_probe(struct platform_device *pdev)
 			return -EPROBE_DEFER;
 	}
 
+	endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
+	if (endpoint) {
+		bridge_node = of_graph_get_remote_port_parent(endpoint);
+		if (bridge_node) {
+			dp->bridge = of_drm_find_bridge(bridge_node);
+			of_node_put(bridge_node);
+			if (!dp->bridge)
+				return -EPROBE_DEFER;
+		} else
+			return -EPROBE_DEFER;
+	}
+
 	ret = component_add(&pdev->dev, &exynos_dp_ops);
 	if (ret)
 		exynos_drm_component_del(&pdev->dev,

drivers/gpu/drm/exynos/exynos_dp_core.h

@@ -153,6 +153,7 @@ struct exynos_dp_device {
 	struct drm_connector	connector;
 	struct drm_encoder	*encoder;
 	struct drm_panel	*panel;
+	struct drm_bridge	*bridge;
 	struct clk		*clock;
 	unsigned int		irq;
 	void __iomem		*reg_base;

drivers/gpu/drm/msm/hdmi/hdmi.c

@@ -247,9 +247,9 @@ int hdmi_modeset_init(struct hdmi *hdmi,
 	return 0;
 
 fail:
-	/* bridge/connector are normally destroyed by drm: */
+	/* bridge is normally destroyed by drm: */
 	if (hdmi->bridge) {
-		hdmi->bridge->funcs->destroy(hdmi->bridge);
+		hdmi_bridge_destroy(hdmi->bridge);
 		hdmi->bridge = NULL;
 	}
 	if (hdmi->connector) {

drivers/gpu/drm/msm/hdmi/hdmi.h

@@ -146,6 +146,7 @@ void hdmi_audio_set_sample_rate(struct hdmi *hdmi, int rate);
  */
 
 struct drm_bridge *hdmi_bridge_init(struct hdmi *hdmi);
+void hdmi_bridge_destroy(struct drm_bridge *bridge);
 
 /*
  * hdmi connector:

drivers/gpu/drm/msm/hdmi/hdmi_bridge.c

@@ -23,10 +23,9 @@ struct hdmi_bridge {
 };
 #define to_hdmi_bridge(x) container_of(x, struct hdmi_bridge, base)
 
-static void hdmi_bridge_destroy(struct drm_bridge *bridge)
+void hdmi_bridge_destroy(struct drm_bridge *bridge)
 {
 	struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
-	drm_bridge_cleanup(bridge);
 	kfree(hdmi_bridge);
 }
 
@@ -200,7 +199,6 @@ static const struct drm_bridge_funcs hdmi_bridge_funcs = {
 		.disable = hdmi_bridge_disable,
 		.post_disable = hdmi_bridge_post_disable,
 		.mode_set = hdmi_bridge_mode_set,
-		.destroy = hdmi_bridge_destroy,
 };
 
 
@@ -220,8 +218,9 @@ struct drm_bridge *hdmi_bridge_init(struct hdmi *hdmi)
 	hdmi_bridge->hdmi = hdmi;
 
 	bridge = &hdmi_bridge->base;
+	bridge->funcs = &hdmi_bridge_funcs;
 
-	drm_bridge_init(hdmi->dev, bridge, &hdmi_bridge_funcs);
+	drm_bridge_attach(hdmi->dev, bridge);
 
 	return bridge;
 

drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c

@@ -19,8 +19,6 @@
 
 #include <video/mipi_display.h>
 
-#include <linux/host1x.h>
-
 struct sharp_panel {
 	struct drm_panel base;
 	/* the datasheet refers to them as DSI-LINK1 and DSI-LINK2 */
@@ -41,6 +39,16 @@ static inline struct sharp_panel *to_sharp_panel(struct drm_panel *panel)
 	return container_of(panel, struct sharp_panel, base);
 }
 
+static void sharp_wait_frames(struct sharp_panel *sharp, unsigned int frames)
+{
+	unsigned int refresh = drm_mode_vrefresh(sharp->mode);
+
+	if (WARN_ON(frames > refresh))
+		return;
+
+	msleep(1000 / (refresh / frames));
+}
+
 static int sharp_panel_write(struct sharp_panel *sharp, u16 offset, u8 value)
 {
 	u8 payload[3] = { offset >> 8, offset & 0xff, value };
@@ -106,6 +114,8 @@ static int sharp_panel_unprepare(struct drm_panel *panel)
 	if (!sharp->prepared)
 		return 0;
 
+	sharp_wait_frames(sharp, 4);
+
 	err = mipi_dsi_dcs_set_display_off(sharp->link1);
 	if (err < 0)
 		dev_err(panel->dev, "failed to set display off: %d\n", err);
@@ -170,15 +180,13 @@ static int sharp_panel_prepare(struct drm_panel *panel)
 	if (err < 0)
 		return err;
 
-	usleep_range(10000, 20000);
-
-	err = mipi_dsi_dcs_soft_reset(sharp->link1);
-	if (err < 0) {
-		dev_err(panel->dev, "soft reset failed: %d\n", err);
-		goto poweroff;
-	}
-
-	msleep(120);
+	/*
+	 * According to the datasheet, the panel needs around 10 ms to fully
+	 * power up. At least another 120 ms is required before exiting sleep
+	 * mode to make sure the panel is ready. Throw in another 20 ms for
+	 * good measure.
+	 */
+	msleep(150);
 
 	err = mipi_dsi_dcs_exit_sleep_mode(sharp->link1);
 	if (err < 0) {
@@ -238,6 +246,9 @@ static int sharp_panel_prepare(struct drm_panel *panel)
 
 	sharp->prepared = true;
 
+	/* wait for 6 frames before continuing */
+	sharp_wait_frames(sharp, 6);
+
 	return 0;
 
 poweroff:

drivers/gpu/drm/panel/panel-simple.c

@@ -448,6 +448,34 @@ static const struct panel_desc auo_b133htn01 = {
 	},
 };
 
+static const struct drm_display_mode avic_tm070ddh03_mode = {
+	.clock = 51200,
+	.hdisplay = 1024,
+	.hsync_start = 1024 + 160,
+	.hsync_end = 1024 + 160 + 4,
+	.htotal = 1024 + 160 + 4 + 156,
+	.vdisplay = 600,
+	.vsync_start = 600 + 17,
+	.vsync_end = 600 + 17 + 1,
+	.vtotal = 600 + 17 + 1 + 17,
+	.vrefresh = 60,
+};
+
+static const struct panel_desc avic_tm070ddh03 = {
+	.modes = &avic_tm070ddh03_mode,
+	.num_modes = 1,
+	.bpc = 8,
+	.size = {
+		.width = 154,
+		.height = 90,
+	},
+	.delay = {
+		.prepare = 20,
+		.enable = 200,
+		.disable = 200,
+	},
+};
+
 static const struct drm_display_mode chunghwa_claa101wa01a_mode = {
 	.clock = 72070,
 	.hdisplay = 1366,
@@ -566,6 +594,29 @@ static const struct panel_desc foxlink_fl500wvr00_a0t = {
 	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
 };
 
+static const struct drm_display_mode giantplus_gpg482739qs5_mode = {
+	.clock = 9000,
+	.hdisplay = 480,
+	.hsync_start = 480 + 5,
+	.hsync_end = 480 + 5 + 1,
+	.htotal = 480 + 5 + 1 + 40,
+	.vdisplay = 272,
+	.vsync_start = 272 + 8,
+	.vsync_end = 272 + 8 + 1,
+	.vtotal = 272 + 8 + 1 + 8,
+	.vrefresh = 60,
+};
+
+static const struct panel_desc giantplus_gpg482739qs5 = {
+	.modes = &giantplus_gpg482739qs5_mode,
+	.num_modes = 1,
+	.bpc = 8,
+	.size = {
+		.width = 95,
+		.height = 54,
+	},
+};
+
 static const struct drm_display_mode hannstar_hsd070pww1_mode = {
 	.clock = 71100,
 	.hdisplay = 1280,
@@ -744,6 +795,9 @@ static const struct of_device_id platform_of_match[] = {
 	}, {
 		.compatible = "auo,b133xtn01",
 		.data = &auo_b133xtn01,
+	}, {
+		.compatible = "avic,tm070ddh03",
+		.data = &avic_tm070ddh03,
 	}, {
 		.compatible = "chunghwa,claa101wa01a",
 		.data = &chunghwa_claa101wa01a
@@ -762,6 +816,9 @@ static const struct of_device_id platform_of_match[] = {
 	}, {
 		.compatible = "foxlink,fl500wvr00-a0t",
 		.data = &foxlink_fl500wvr00_a0t,
+	}, {
+		.compatible = "giantplus,gpg482739qs5",
+		.data = &giantplus_gpg482739qs5
 	}, {
 		.compatible = "hannstar,hsd070pww1",
 		.data = &hannstar_hsd070pww1,

drivers/gpu/drm/sti/sti_dvo.c

@@ -91,6 +91,7 @@ struct sti_dvo {
 	struct dvo_config *config;
 	bool enabled;
 	struct drm_encoder *encoder;
+	struct drm_bridge *bridge;
 };
 
 struct sti_dvo_connector {
@@ -272,19 +273,12 @@ static void sti_dvo_bridge_nope(struct drm_bridge *bridge)
 	/* do nothing */
 }
 
-static void sti_dvo_brigde_destroy(struct drm_bridge *bridge)
-{
-	drm_bridge_cleanup(bridge);
-	kfree(bridge);
-}
-
 static const struct drm_bridge_funcs sti_dvo_bridge_funcs = {
 	.pre_enable = sti_dvo_pre_enable,
 	.enable = sti_dvo_bridge_nope,
 	.disable = sti_dvo_disable,
 	.post_disable = sti_dvo_bridge_nope,
 	.mode_set = sti_dvo_set_mode,
-	.destroy = sti_dvo_brigde_destroy,
 };
 
 static int sti_dvo_connector_get_modes(struct drm_connector *connector)
@@ -416,8 +410,21 @@ static int sti_dvo_bind(struct device *dev, struct device *master, void *data)
 		return -ENOMEM;
 
 	bridge->driver_private = dvo;
-	drm_bridge_init(drm_dev, bridge, &sti_dvo_bridge_funcs);
+	bridge->funcs = &sti_dvo_bridge_funcs;
+	bridge->of_node = dvo->dev.of_node;
+	err = drm_bridge_add(bridge);
+	if (err) {
+		DRM_ERROR("Failed to add bridge\n");
+		return err;
+	}
 
+	err = drm_bridge_attach(drm_dev, bridge);
+	if (err) {
+		DRM_ERROR("Failed to attach bridge\n");
+		return err;
+	}
+
+	dvo->bridge = bridge;
 	encoder->bridge = bridge;
 	connector->encoder = encoder;
 	dvo->encoder = encoder;
@@ -446,7 +453,7 @@ static int sti_dvo_bind(struct device *dev, struct device *master, void *data)
 err_sysfs:
 	drm_connector_unregister(drm_connector);
 err_connector:
-	drm_bridge_cleanup(bridge);
+	drm_bridge_remove(bridge);
 	drm_connector_cleanup(drm_connector);
 	return -EINVAL;
 }
@@ -454,7 +461,9 @@ err_connector:
 static void sti_dvo_unbind(struct device *dev,
 			   struct device *master, void *data)
 {
-	/* do nothing */
+	struct sti_dvo *dvo = dev_get_drvdata(dev);
+
+	drm_bridge_remove(dvo->bridge);
 }
 
 static const struct component_ops sti_dvo_ops = {

drivers/gpu/drm/sti/sti_hda.c

@@ -508,19 +508,12 @@ static void sti_hda_bridge_nope(struct drm_bridge *bridge)
 	/* do nothing */
 }
 
-static void sti_hda_brigde_destroy(struct drm_bridge *bridge)
-{
-	drm_bridge_cleanup(bridge);
-	kfree(bridge);
-}
-
 static const struct drm_bridge_funcs sti_hda_bridge_funcs = {
 	.pre_enable = sti_hda_pre_enable,
 	.enable = sti_hda_bridge_nope,
 	.disable = sti_hda_disable,
 	.post_disable = sti_hda_bridge_nope,
 	.mode_set = sti_hda_set_mode,
-	.destroy = sti_hda_brigde_destroy,
 };
 
 static int sti_hda_connector_get_modes(struct drm_connector *connector)
@@ -664,7 +657,8 @@ static int sti_hda_bind(struct device *dev, struct device *master, void *data)
 		return -ENOMEM;
 
 	bridge->driver_private = hda;
-	drm_bridge_init(drm_dev, bridge, &sti_hda_bridge_funcs);
+	bridge->funcs = &sti_hda_bridge_funcs;
+	drm_bridge_attach(drm_dev, bridge);
 
 	encoder->bridge = bridge;
 	connector->encoder = encoder;
@@ -693,7 +687,6 @@ static int sti_hda_bind(struct device *dev, struct device *master, void *data)
 err_sysfs:
 	drm_connector_unregister(drm_connector);
 err_connector:
-	drm_bridge_cleanup(bridge);
 	drm_connector_cleanup(drm_connector);
 	return -EINVAL;
 }

drivers/gpu/drm/sti/sti_hdmi.c

@@ -463,19 +463,12 @@ static void sti_hdmi_bridge_nope(struct drm_bridge *bridge)
 	/* do nothing */
 }
 
-static void sti_hdmi_brigde_destroy(struct drm_bridge *bridge)
-{
-	drm_bridge_cleanup(bridge);
-	kfree(bridge);
-}
-
 static const struct drm_bridge_funcs sti_hdmi_bridge_funcs = {
 	.pre_enable = sti_hdmi_pre_enable,
 	.enable = sti_hdmi_bridge_nope,
 	.disable = sti_hdmi_disable,
 	.post_disable = sti_hdmi_bridge_nope,
 	.mode_set = sti_hdmi_set_mode,
-	.destroy = sti_hdmi_brigde_destroy,
 };
 
 static int sti_hdmi_connector_get_modes(struct drm_connector *connector)
@@ -635,7 +628,8 @@ static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
 		goto err_adapt;
 
 	bridge->driver_private = hdmi;
-	drm_bridge_init(drm_dev, bridge, &sti_hdmi_bridge_funcs);
+	bridge->funcs = &sti_hdmi_bridge_funcs;
+	drm_bridge_attach(drm_dev, bridge);
 
 	encoder->bridge = bridge;
 	connector->encoder = encoder;
@@ -667,7 +661,6 @@ static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
 err_sysfs:
 	drm_connector_unregister(drm_connector);
 err_connector:
-	drm_bridge_cleanup(bridge);
 	drm_connector_cleanup(drm_connector);
 err_adapt:
 	put_device(&hdmi->ddc_adapt->dev);

include/drm/bridge/ptn3460.h

@@ -15,6 +15,7 @@
 #define _DRM_BRIDGE_PTN3460_H_
 
 struct drm_device;
+struct drm_bridge;
 struct drm_encoder;
 struct i2c_client;
 struct device_node;
@@ -23,6 +24,9 @@ struct device_node;
 
 int ptn3460_init(struct drm_device *dev, struct drm_encoder *encoder,
 		struct i2c_client *client, struct device_node *node);
+
+void ptn3460_destroy(struct drm_bridge *bridge);
+
 #else
 
 static inline int ptn3460_init(struct drm_device *dev,
@@ -32,6 +36,10 @@ static inline int ptn3460_init(struct drm_device *dev,
 	return 0;
 }
 
+static inline void ptn3460_destroy(struct drm_bridge *bridge)
+{
+}
+
 #endif
 
 #endif

include/drm/drm_crtc.h

@@ -868,15 +868,16 @@ struct drm_plane {
 
 /**
  * struct drm_bridge_funcs - drm_bridge control functions
+ * @attach: Called during drm_bridge_attach
  * @mode_fixup: Try to fixup (or reject entirely) proposed mode for this bridge
  * @disable: Called right before encoder prepare, disables the bridge
  * @post_disable: Called right after encoder prepare, for lockstepped disable
  * @mode_set: Set this mode to the bridge
  * @pre_enable: Called right before encoder commit, for lockstepped commit
  * @enable: Called right after encoder commit, enables the bridge
- * @destroy: make object go away
  */
 struct drm_bridge_funcs {
+	int (*attach)(struct drm_bridge *bridge);
 	bool (*mode_fixup)(struct drm_bridge *bridge,
 			   const struct drm_display_mode *mode,
 			   struct drm_display_mode *adjusted_mode);
@@ -887,22 +888,24 @@ struct drm_bridge_funcs {
 			 struct drm_display_mode *adjusted_mode);
 	void (*pre_enable)(struct drm_bridge *bridge);
 	void (*enable)(struct drm_bridge *bridge);
-	void (*destroy)(struct drm_bridge *bridge);
 };
 
 /**
  * struct drm_bridge - central DRM bridge control structure
  * @dev: DRM device this bridge belongs to
- * @head: list management
+ * @of_node: device node pointer to the bridge
+ * @list: to keep track of all added bridges
  * @base: base mode object
  * @funcs: control functions
  * @driver_private: pointer to the bridge driver's internal context
  */
 struct drm_bridge {
 	struct drm_device *dev;
-	struct list_head head;
-
-	struct drm_mode_object base;
+	struct drm_encoder *encoder;
+#ifdef CONFIG_OF
+	struct device_node *of_node;
+#endif
+	struct list_head list;
 
 	const struct drm_bridge_funcs *funcs;
 	void *driver_private;
@@ -1007,7 +1010,6 @@ struct drm_mode_group {
 	uint32_t num_crtcs;
 	uint32_t num_encoders;
 	uint32_t num_connectors;
-	uint32_t num_bridges;
 
 	/* list of object IDs for this group */
 	uint32_t *id_list;
@@ -1026,8 +1028,6 @@ struct drm_mode_group {
  * @fb_list: list of framebuffers available
  * @num_connector: number of connectors on this device
  * @connector_list: list of connector objects
- * @num_bridge: number of bridges on this device
- * @bridge_list: list of bridge objects
  * @num_encoder: number of encoders on this device
  * @encoder_list: list of encoder objects
  * @num_overlay_plane: number of overlay planes on this device
@@ -1072,8 +1072,6 @@ struct drm_mode_config {
 
 	int num_connector;
 	struct list_head connector_list;
-	int num_bridge;
-	struct list_head bridge_list;
 	int num_encoder;
 	struct list_head encoder_list;
 
@@ -1222,9 +1220,10 @@ extern unsigned int drm_connector_index(struct drm_connector *connector);
 /* helper to unplug all connectors from sysfs for device */
 extern void drm_connector_unplug_all(struct drm_device *dev);
 
-extern int drm_bridge_init(struct drm_device *dev, struct drm_bridge *bridge,
-			   const struct drm_bridge_funcs *funcs);
-extern void drm_bridge_cleanup(struct drm_bridge *bridge);
+extern int drm_bridge_add(struct drm_bridge *bridge);
+extern void drm_bridge_remove(struct drm_bridge *bridge);
+extern struct drm_bridge *of_drm_find_bridge(struct device_node *np);
+extern int drm_bridge_attach(struct drm_device *dev, struct drm_bridge *bridge);
 
 extern int drm_encoder_init(struct drm_device *dev,
 			    struct drm_encoder *encoder,