Merge tag 'drm-misc-next-2018-02-21' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for 4.17:

Cross-subsystem Changes:
- Backlight helpers to enable/disable and find devices in dt (Meghana)

Core Changes:
- Documentation improvements (Chris/Daniel/Jani)
- simple_kms_helper: Add mode_valid() support (Linus)
- mm: Fix bug in interval_tree causing nodes to be out-of-order (Chris)

Driver Changes:
- tinydrm/panel: Use the new backlight helpers (Meghana)
- rockchip: Support gem_prime_import_sg_table + some fixes (Various)
- sun4i: Add A83T HDMI support using dw-hdmi (Jernej)

Cc: Meghana Madhyastha <meghana.madhyastha@gmail.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: Jernej Skrabec <jernej.skrabec@siol.net>

* tag 'drm-misc-next-2018-02-21' of git://anongit.freedesktop.org/drm/drm-misc: (41 commits)
  drm/omapdrm: Use of_find_backlight helper
  drm/panel: Use of_find_backlight helper
  drm/omapdrm: Use backlight_enable/disable helpers
  drm/panel: Use backlight_enable/disable helpers
  drm/tinydrm: Call devres version of of_find_backlight
  drm/tinydrm: Replace tinydrm_of_find_backlight with of_find_backlight
  drm/tinydrm: Convert tinydrm_enable/disable_backlight to backlight_enable/disable
  drm: add documentation for tv connector state margins
  drm/doc: Use new substruct support
  drm/doc: Polish for drm_mode_parse_command_line_for_connector
  drm/docs: Document "scaling mode" property better
  drm/docs: Align layout of optional plane blending properties
  drm/docs: Discourage adding more to kms-properties.csv
  drm: simple_kms_helper: Add mode_valid() callback support
  drm/todo: Add idr_init_base todo
  drm: Use idr_init_base(1) when using id==0 for invalid
  drm: NULL pointer dereference [null-pointer-deref] (CWE 476) problem
  drm: NULL pointer dereference [null-pointer-deref] (CWE 476) problem
  dma-buf/sw_sync: Fix kerneldoc warnings
  drm: Fix kerneldoc warnings for drm_lease
  ...

Documentation/devicetree/bindings/display/rockchip/cdn-dp-rockchip.txt

+Rockchip RK3399 specific extensions to the cdn Display Port
+================================
+
+Required properties:
+- compatible: must be "rockchip,rk3399-cdn-dp"
+
+- reg: physical base address of the controller and length
+
+- clocks: from common clock binding: handle to dp clock.
+
+- clock-names: from common clock binding:
+	       Required elements: "core-clk" "pclk" "spdif" "grf"
+
+- resets : a list of phandle + reset specifier pairs
+- reset-names : string of reset names
+		Required elements: "apb", "core", "dptx", "spdif"
+- power-domains : power-domain property defined with a phandle
+		  to respective power domain.
+- assigned-clocks: main clock, should be <&cru SCLK_DP_CORE>
+- assigned-clock-rates : the DP core clk frequency, shall be: 100000000
+
+- rockchip,grf: this soc should set GRF regs, so need get grf here.
+
+- ports: contain a port nodes with endpoint definitions as defined in
+	 Documentation/devicetree/bindings/media/video-interfaces.txt.
+	 contained 2 endpoints, connecting to the output of vop.
+
+- phys: from general PHY binding: the phandle for the PHY device.
+
+- extcon: extcon specifier for the Power Delivery
+
+- #sound-dai-cells = it must be 1 if your system is using 2 DAIs: I2S, SPDIF
+
+-------------------------------------------------------------------------------
+
+Example:
+	cdn_dp: dp@fec00000 {
+		compatible = "rockchip,rk3399-cdn-dp";
+		reg = <0x0 0xfec00000 0x0 0x100000>;
+		interrupts = <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&cru SCLK_DP_CORE>, <&cru PCLK_DP_CTRL>,
+			 <&cru SCLK_SPDIF_REC_DPTX>, <&cru PCLK_VIO_GRF>;
+		clock-names = "core-clk", "pclk", "spdif", "grf";
+		assigned-clocks = <&cru SCLK_DP_CORE>;
+		assigned-clock-rates = <100000000>;
+		power-domains = <&power RK3399_PD_HDCP>;
+		phys = <&tcphy0_dp>, <&tcphy1_dp>;
+		resets = <&cru SRST_DPTX_SPDIF_REC>;
+		reset-names = "spdif";
+		extcon = <&fusb0>, <&fusb1>;
+		rockchip,grf = <&grf>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		#sound-dai-cells = <1>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			dp_in: port {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				dp_in_vopb: endpoint@0 {
+					reg = <0>;
+					remote-endpoint = <&vopb_out_dp>;
+				};
+
+				dp_in_vopl: endpoint@1 {
+					reg = <1>;
+					remote-endpoint = <&vopl_out_dp>;
+				};
+			};
+		};
+	};

Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt

@@ -64,6 +64,52 @@ Required properties:
     first port should be the input endpoint. The second should be the
     output, usually to an HDMI connector.
 
+DWC HDMI TX Encoder
+-------------------
+
+The HDMI transmitter is a Synopsys DesignWare HDMI 1.4 TX controller IP
+with Allwinner's own PHY IP. It supports audio and video outputs and CEC.
+
+These DT bindings follow the Synopsys DWC HDMI TX bindings defined in
+Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt with the
+following device-specific properties.
+
+Required properties:
+
+  - compatible: value must be one of:
+    * "allwinner,sun8i-a83t-dw-hdmi"
+  - reg: base address and size of memory-mapped region
+  - reg-io-width: See dw_hdmi.txt. Shall be 1.
+  - interrupts: HDMI interrupt number
+  - clocks: phandles to the clocks feeding the HDMI encoder
+    * iahb: the HDMI bus clock
+    * isfr: the HDMI register clock
+    * tmds: TMDS clock
+  - clock-names: the clock names mentioned above
+  - resets: phandle to the reset controller
+  - reset-names: must be "ctrl"
+  - phys: phandle to the DWC HDMI PHY
+  - phy-names: must be "phy"
+
+  - ports: A ports node with endpoint definitions as defined in
+    Documentation/devicetree/bindings/media/video-interfaces.txt. The
+    first port should be the input endpoint. The second should be the
+    output, usually to an HDMI connector.
+
+DWC HDMI PHY
+------------
+
+Required properties:
+  - compatible: value must be one of:
+    * allwinner,sun8i-a83t-hdmi-phy
+  - reg: base address and size of memory-mapped region
+  - clocks: phandles to the clocks feeding the HDMI PHY
+    * bus: the HDMI PHY interface clock
+    * mod: the HDMI PHY module clock
+  - clock-names: the clock names mentioned above
+  - resets: phandle to the reset controller driving the PHY
+  - reset-names: must be "phy"
+
 TV Encoder
 ----------
 
@@ -94,24 +140,26 @@ Required properties:
    * allwinner,sun7i-a20-tcon
    * allwinner,sun8i-a33-tcon
    * allwinner,sun8i-a83t-tcon-lcd
+   * allwinner,sun8i-a83t-tcon-tv
    * allwinner,sun8i-v3s-tcon
  - reg: base address and size of memory-mapped region
  - interrupts: interrupt associated to this IP
- - clocks: phandles to the clocks feeding the TCON. Three are needed:
+ - clocks: phandles to the clocks feeding the TCON.
    - 'ahb': the interface clocks
-   - 'tcon-ch0': The clock driving the TCON channel 0
+   - 'tcon-ch0': The clock driving the TCON channel 0, except for A83T TV TCON
  - resets: phandles to the reset controllers driving the encoder
    - "lcd": the reset line for the TCON channel 0
 
  - clock-names: the clock names mentioned above
  - reset-names: the reset names mentioned above
- - clock-output-names: Name of the pixel clock created
+ - clock-output-names: Name of the pixel clock created, if TCON supports
+   channel 0.
 
 - ports: A ports node with endpoint definitions as defined in
   Documentation/devicetree/bindings/media/video-interfaces.txt. The
   first port should be the input endpoint, the second one the output
 
-  The output may have multiple endpoints. The TCON has two channels,
+  The output may have multiple endpoints. TCON can have 1 or 2 channels,
   usually with the first channel being used for the panels interfaces
   (RGB, LVDS, etc.), and the second being used for the outputs that
   require another controller (TV Encoder, HDMI, etc.). The endpoints
@@ -122,8 +170,8 @@ Required properties:
 On SoCs other than the A33 and V3s, there is one more clock required:
    - 'tcon-ch1': The clock driving the TCON channel 1
 
-On SoCs that support LVDS (all SoCs but the A13, H3, H5 and V3s), you
-need one more reset line:
+When TCON support LVDS (all TCONs except TV TCON on A83T and those found
+in A13, H3, H5 and V3s SoCs), you need one more reset line:
    - 'lvds': The reset line driving the LVDS logic
 
 And on the A23, A31, A31s and A33, you need one more clock line:
@@ -226,6 +274,7 @@ supported.
 Required properties:
   - compatible: value must be one of:
     * allwinner,sun8i-a83t-de2-mixer-0
+    * allwinner,sun8i-a83t-de2-mixer-1
     * allwinner,sun8i-v3s-de2-mixer
   - reg: base address and size of the memory-mapped region.
   - clocks: phandles to the clocks feeding the mixer

Documentation/gpu/drm-kms.rst

@@ -547,8 +547,9 @@ Explicit Fencing Properties
 Existing KMS Properties
 -----------------------
 
-The following table gives description of drm properties exposed by
-various modules/drivers.
+The following table gives description of drm properties exposed by various
+modules/drivers. Because this table is very unwieldy, do not add any new
+properties here. Instead document them in a section above.
 
 .. csv-table::
    :header-rows: 1

Documentation/gpu/kms-properties.csv

 Owner Module/Drivers,Group,Property Name,Type,Property Values,Object attached,Description/Restrictions
-,,“scaling mode”,ENUM,"{ ""None"", ""Full"", ""Center"", ""Full aspect"" }",Connector,"Supported by: amdgpu, gma500, i915, nouveau and radeon."
 ,DVI-I,“subconnector”,ENUM,"{ “Unknown”, “DVI-D”, “DVI-A” }",Connector,TBD
 ,,“select subconnector”,ENUM,"{ “Automatic”, “DVI-D”, “DVI-A” }",Connector,TBD
 ,TV,“subconnector”,ENUM,"{ ""Unknown"", ""Composite"", ""SVIDEO"", ""Component"", ""SCART"" }",Connector,TBD

Documentation/gpu/todo.rst

@@ -212,6 +212,16 @@ probably use drm_fb_helper_fbdev_teardown().
 
 Contact: Maintainer of the driver you plan to convert
 
+idr_init_base()
+---------------
+
+DRM core&drivers uses a lot of idr (integer lookup directories) for mapping
+userspace IDs to internal objects, and in most places ID=0 means NULL and hence
+is never used. Switching to idr_init_base() for these would make the idr more
+efficient.
+
+Contact: Daniel Vetter
+
 Core refactorings
 =================
 

drivers/dma-buf/sw_sync.c

@@ -235,10 +235,10 @@ static void sync_timeline_signal(struct sync_timeline *obj, unsigned int inc)
 
 /**
  * sync_pt_create() - creates a sync pt
- * @parent:	fence's parent sync_timeline
- * @inc:	value of the fence
+ * @obj:	parent sync_timeline
+ * @value:	value of the fence
  *
- * Creates a new sync_pt as a child of @parent.  @size bytes will be
+ * Creates a new sync_pt (fence) as a child of @parent.  @size bytes will be
  * allocated allowing for implementation specific data to be kept after
  * the generic sync_timeline struct. Returns the sync_pt object or
  * NULL in case of error.

drivers/gpu/drm/bochs/bochs_mm.c

@@ -194,7 +194,7 @@ static struct ttm_tt *bochs_ttm_tt_create(struct ttm_bo_device *bdev,
 	return tt;
 }
 
-struct ttm_bo_driver bochs_bo_driver = {
+static struct ttm_bo_driver bochs_bo_driver = {
 	.ttm_tt_create = bochs_ttm_tt_create,
 	.ttm_tt_populate = ttm_pool_populate,
 	.ttm_tt_unpopulate = ttm_pool_unpopulate,

drivers/gpu/drm/bridge/synopsys/dw-hdmi.c

@@ -1037,19 +1037,21 @@ static void dw_hdmi_phy_enable_svsret(struct dw_hdmi *hdmi, u8 enable)
 			 HDMI_PHY_CONF0_SVSRET_MASK);
 }
 
-static void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
+void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
 {
 	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
 			 HDMI_PHY_CONF0_GEN2_PDDQ_OFFSET,
 			 HDMI_PHY_CONF0_GEN2_PDDQ_MASK);
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_pddq);
 
-static void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
+void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
 {
 	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
 			 HDMI_PHY_CONF0_GEN2_TXPWRON_OFFSET,
 			 HDMI_PHY_CONF0_GEN2_TXPWRON_MASK);
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_txpwron);
 
 static void dw_hdmi_phy_sel_data_en_pol(struct dw_hdmi *hdmi, u8 enable)
 {
@@ -1065,6 +1067,22 @@ static void dw_hdmi_phy_sel_interface_control(struct dw_hdmi *hdmi, u8 enable)
 			 HDMI_PHY_CONF0_SELDIPIF_MASK);
 }
 
+void dw_hdmi_phy_reset(struct dw_hdmi *hdmi)
+{
+	/* PHY reset. The reset signal is active high on Gen2 PHYs. */
+	hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
+	hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_reset);
+
+void dw_hdmi_phy_i2c_set_addr(struct dw_hdmi *hdmi, u8 address)
+{
+	hdmi_phy_test_clear(hdmi, 1);
+	hdmi_writeb(hdmi, address, HDMI_PHY_I2CM_SLAVE_ADDR);
+	hdmi_phy_test_clear(hdmi, 0);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_i2c_set_addr);
+
 static void dw_hdmi_phy_power_off(struct dw_hdmi *hdmi)
 {
 	const struct dw_hdmi_phy_data *phy = hdmi->phy.data;
@@ -1203,16 +1221,11 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi)
 	if (phy->has_svsret)
 		dw_hdmi_phy_enable_svsret(hdmi, 1);
 
-	/* PHY reset. The reset signal is active high on Gen2 PHYs. */
-	hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
-	hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
+	dw_hdmi_phy_reset(hdmi);
 
 	hdmi_writeb(hdmi, HDMI_MC_HEACPHY_RST_ASSERT, HDMI_MC_HEACPHY_RST);
 
-	hdmi_phy_test_clear(hdmi, 1);
-	hdmi_writeb(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2,
-		    HDMI_PHY_I2CM_SLAVE_ADDR);
-	hdmi_phy_test_clear(hdmi, 0);
+	dw_hdmi_phy_i2c_set_addr(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2);
 
 	/* Write to the PHY as configured by the platform */
 	if (pdata->configure_phy)
@@ -1251,15 +1264,16 @@ static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi, void *data)
 	dw_hdmi_phy_power_off(hdmi);
 }
 
-static enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
-						      void *data)
+enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
+					       void *data)
 {
 	return hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_HPD ?
 		connector_status_connected : connector_status_disconnected;
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_read_hpd);
 
-static void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
-				   bool force, bool disabled, bool rxsense)
+void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
+			    bool force, bool disabled, bool rxsense)
 {
 	u8 old_mask = hdmi->phy_mask;
 
@@ -1271,8 +1285,9 @@ static void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
 	if (old_mask != hdmi->phy_mask)
 		hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_update_hpd);
 
-static void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
+void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
 {
 	/*
 	 * Configure the PHY RX SENSE and HPD interrupts polarities and clear
@@ -1291,6 +1306,7 @@ static void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
 	hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE),
 		    HDMI_IH_MUTE_PHY_STAT0);
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_setup_hpd);
 
 static const struct dw_hdmi_phy_ops dw_hdmi_synopsys_phy_ops = {
 	.init = dw_hdmi_phy_init,
@@ -1634,9 +1650,10 @@ static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi)
 	 * then write one of the FC registers several times.
 	 *
 	 * The number of iterations matters and depends on the HDMI TX revision
-	 * (and possibly on the platform). So far only i.MX6Q (v1.30a) and
-	 * i.MX6DL (v1.31a) have been identified as needing the workaround, with
-	 * 4 and 1 iterations respectively.
+	 * (and possibly on the platform). So far i.MX6Q (v1.30a), i.MX6DL
+	 * (v1.31a) and multiple Allwinner SoCs (v1.32a) have been identified
+	 * as needing the workaround, with 4 iterations for v1.30a and 1
+	 * iteration for others.
 	 */
 
 	switch (hdmi->version) {
@@ -1644,6 +1661,7 @@ static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi)
 		count = 4;
 		break;
 	case 0x131a:
+	case 0x132a:
 		count = 1;
 		break;
 	default:
@@ -2525,8 +2543,6 @@ __dw_hdmi_probe(struct platform_device *pdev,
 	if (hdmi->i2c)
 		dw_hdmi_i2c_init(hdmi);
 
-	platform_set_drvdata(pdev, hdmi);
-
 	return hdmi;
 
 err_iahb:
@@ -2576,25 +2592,23 @@ static void __dw_hdmi_remove(struct dw_hdmi *hdmi)
 /* -----------------------------------------------------------------------------
  * Probe/remove API, used from platforms based on the DRM bridge API.
  */
-int dw_hdmi_probe(struct platform_device *pdev,
-		  const struct dw_hdmi_plat_data *plat_data)
+struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
+			      const struct dw_hdmi_plat_data *plat_data)
 {
 	struct dw_hdmi *hdmi;
 
 	hdmi = __dw_hdmi_probe(pdev, plat_data);
 	if (IS_ERR(hdmi))
-		return PTR_ERR(hdmi);
+		return hdmi;
 
 	drm_bridge_add(&hdmi->bridge);
 
-	return 0;
+	return hdmi;
 }
 EXPORT_SYMBOL_GPL(dw_hdmi_probe);
 
-void dw_hdmi_remove(struct platform_device *pdev)
+void dw_hdmi_remove(struct dw_hdmi *hdmi)
 {
-	struct dw_hdmi *hdmi = platform_get_drvdata(pdev);
-
 	drm_bridge_remove(&hdmi->bridge);
 
 	__dw_hdmi_remove(hdmi);
@@ -2604,31 +2618,30 @@ EXPORT_SYMBOL_GPL(dw_hdmi_remove);
 /* -----------------------------------------------------------------------------
  * Bind/unbind API, used from platforms based on the component framework.
  */
-int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
-		 const struct dw_hdmi_plat_data *plat_data)
+struct dw_hdmi *dw_hdmi_bind(struct platform_device *pdev,
+			     struct drm_encoder *encoder,
+			     const struct dw_hdmi_plat_data *plat_data)
 {
 	struct dw_hdmi *hdmi;
 	int ret;
 
 	hdmi = __dw_hdmi_probe(pdev, plat_data);
 	if (IS_ERR(hdmi))
-		return PTR_ERR(hdmi);
+		return hdmi;
 
 	ret = drm_bridge_attach(encoder, &hdmi->bridge, NULL);
 	if (ret) {
-		dw_hdmi_remove(pdev);
+		dw_hdmi_remove(hdmi);
 		DRM_ERROR("Failed to initialize bridge with drm\n");
-		return ret;
+		return ERR_PTR(ret);
 	}
 
-	return 0;
+	return hdmi;
 }
 EXPORT_SYMBOL_GPL(dw_hdmi_bind);
 
-void dw_hdmi_unbind(struct device *dev)
+void dw_hdmi_unbind(struct dw_hdmi *hdmi)
 {
-	struct dw_hdmi *hdmi = dev_get_drvdata(dev);
-
 	__dw_hdmi_remove(hdmi);
 }
 EXPORT_SYMBOL_GPL(dw_hdmi_unbind);

drivers/gpu/drm/drm_blend.c

@@ -88,15 +88,17 @@
  * On top of this basic transformation additional properties can be exposed by
  * the driver:
  *
- * - Rotation is set up with drm_plane_create_rotation_property(). It adds a
- *   rotation and reflection step between the source and destination rectangles.
- *   Without this property the rectangle is only scaled, but not rotated or
- *   reflected.
+ * rotation:
+ *	Rotation is set up with drm_plane_create_rotation_property(). It adds a
+ *	rotation and reflection step between the source and destination rectangles.
+ *	Without this property the rectangle is only scaled, but not rotated or
+ *	reflected.
  *
- * - Z position is set up with drm_plane_create_zpos_immutable_property() and
- *   drm_plane_create_zpos_property(). It controls the visibility of overlapping
- *   planes. Without this property the primary plane is always below the cursor
- *   plane, and ordering between all other planes is undefined.
+ * zpos:
+ *	Z position is set up with drm_plane_create_zpos_immutable_property() and
+ *	drm_plane_create_zpos_property(). It controls the visibility of overlapping
+ *	planes. Without this property the primary plane is always below the cursor
+ *	plane, and ordering between all other planes is undefined.
  *
  * Note that all the property extensions described here apply either to the
  * plane or the CRTC (e.g. for the background color, which currently is not

drivers/gpu/drm/drm_connector.c

@@ -849,13 +849,13 @@ DRM_ENUM_NAME_FN(drm_get_content_protection_name, drm_cp_enum_list)
  *
  *	The value of this property can be one of the following:
  *
- *	- DRM_MODE_CONTENT_PROTECTION_UNDESIRED = 0
+ *	DRM_MODE_CONTENT_PROTECTION_UNDESIRED = 0
  *		The link is not protected, content is transmitted in the clear.
- *	- DRM_MODE_CONTENT_PROTECTION_DESIRED = 1
+ *	DRM_MODE_CONTENT_PROTECTION_DESIRED = 1
  *		Userspace has requested content protection, but the link is not
  *		currently protected. When in this state, kernel should enable
  *		Content Protection as soon as possible.
- *	- DRM_MODE_CONTENT_PROTECTION_ENABLED = 2
+ *	DRM_MODE_CONTENT_PROTECTION_ENABLED = 2
  *		Userspace has requested content protection, and the link is
  *		protected. Only the driver can set the property to this value.
  *		If userspace attempts to set to ENABLED, kernel will return
@@ -889,7 +889,31 @@ DRM_ENUM_NAME_FN(drm_get_content_protection_name, drm_cp_enum_list)
  *	INPUT_PROP_DIRECT) will still map 1:1 to the actual LCD panel
  *	coordinates, so if userspace rotates the picture to adjust for
  *	the orientation it must also apply the same transformation to the
- *	touchscreen input coordinates.
+ *	touchscreen input coordinates. This property is initialized by calling
+ *	drm_connector_init_panel_orientation_property().
+ *
+ * scaling mode:
+ *	This property defines how a non-native mode is upscaled to the native
+ *	mode of an LCD panel:
+ *
+ *	None:
+ *		No upscaling happens, scaling is left to the panel. Not all
+ *		drivers expose this mode.
+ *	Full:
+ *		The output is upscaled to the full resolution of the panel,
+ *		ignoring the aspect ratio.
+ *	Center:
+ *		No upscaling happens, the output is centered within the native
+ *		resolution the panel.
+ *	Full aspect:
+ *		The output is upscaled to maximize either the width or height
+ *		while retaining the aspect ratio.
+ *
+ *	This property should be set up by calling
+ *	drm_connector_attach_scaling_mode_property(). Note that drivers
+ *	can also expose this property to external outputs, in which case they
+ *	must support "None", which should be the default (since external screens
+ *	have a built-in scaler).
  */
 
 int drm_connector_create_standard_properties(struct drm_device *dev)

drivers/gpu/drm/drm_dp_mst_topology.c

@@ -1082,10 +1082,12 @@ static bool drm_dp_port_setup_pdt(struct drm_dp_mst_port *port)
 		lct = drm_dp_calculate_rad(port, rad);
 
 		port->mstb = drm_dp_add_mst_branch_device(lct, rad);
-		port->mstb->mgr = port->mgr;
-		port->mstb->port_parent = port;
+		if (port->mstb) {
+			port->mstb->mgr = port->mgr;
+			port->mstb->port_parent = port;
 
-		send_link = true;
+			send_link = true;
+		}
 		break;
 	}
 	return send_link;

drivers/gpu/drm/drm_edid.c

@@ -2083,6 +2083,8 @@ drm_mode_std(struct drm_connector *connector, struct edid *edid,
 	if (hsize == 1366 && vsize == 768 && vrefresh_rate == 60) {
 		mode = drm_cvt_mode(dev, 1366, 768, vrefresh_rate, 0, 0,
 				    false);
+		if (!mode)
+			return NULL;
 		mode->hdisplay = 1366;
 		mode->hsync_start = mode->hsync_start - 1;
 		mode->hsync_end = mode->hsync_end - 1;

drivers/gpu/drm/drm_gem.c

@@ -98,7 +98,7 @@ drm_gem_init(struct drm_device *dev)
 	struct drm_vma_offset_manager *vma_offset_manager;
 
 	mutex_init(&dev->object_name_lock);
-	idr_init(&dev->object_name_idr);
+	idr_init_base(&dev->object_name_idr, 1);
 
 	vma_offset_manager = kzalloc(sizeof(*vma_offset_manager), GFP_KERNEL);
 	if (!vma_offset_manager) {
@@ -776,7 +776,7 @@ drm_gem_open_ioctl(struct drm_device *dev, void *data,
 void
 drm_gem_open(struct drm_device *dev, struct drm_file *file_private)
 {
-	idr_init(&file_private->object_idr);
+	idr_init_base(&file_private->object_idr, 1);
 	spin_lock_init(&file_private->table_lock);
 }
 

drivers/gpu/drm/drm_lease.c

@@ -44,7 +44,7 @@ EXPORT_SYMBOL(drm_lease_owner);
 /**
  * _drm_find_lessee - find lessee by id (idr_mutex held)
  * @master: drm_master of lessor
- * @id: lessee_id
+ * @lessee_id: id
  *
  * RETURN:
  *
@@ -101,7 +101,7 @@ static bool _drm_has_leased(struct drm_master *master, int id)
 
 /**
  * _drm_lease_held - check drm_mode_object lease status (idr_mutex held)
- * @master: the drm_master
+ * @file_priv: the master drm_file
  * @id: the object id
  *
  * Checks if the specified master holds a lease on the object. Return
@@ -121,7 +121,7 @@ EXPORT_SYMBOL(_drm_lease_held);
 
 /**
  * drm_lease_held - check drm_mode_object lease status (idr_mutex not held)
- * @master: the drm_master
+ * @file_priv: the master drm_file
  * @id: the object id
  *
  * Checks if the specified master holds a lease on the object. Return
@@ -149,7 +149,7 @@ EXPORT_SYMBOL(drm_lease_held);
 /**
  * drm_lease_filter_crtcs - restricted crtc set to leased values (idr_mutex not held)
  * @file_priv: requestor file
- * @crtcs: bitmask of crtcs to check
+ * @crtcs_in: bitmask of crtcs to check
  *
  * Reconstructs a crtc mask based on the crtcs which are visible
  * through the specified file.
@@ -305,7 +305,7 @@ void drm_lease_destroy(struct drm_master *master)
 
 /**
  * _drm_lease_revoke - revoke access to all leased objects (idr_mutex held)
- * @master: the master losing its lease
+ * @top: the master losing its lease
  */
 static void _drm_lease_revoke(struct drm_master *top)
 {
@@ -482,7 +482,7 @@ static int fill_object_idr(struct drm_device *dev,
  * drm_mode_create_lease_ioctl - create a new lease
  * @dev: the drm device
  * @data: pointer to struct drm_mode_create_lease
- * @file_priv: the file being manipulated
+ * @lessor_priv: the file being manipulated
  *
  * The master associated with the specified file will have a lease
  * created containing the objects specified in the ioctl structure.
@@ -662,7 +662,7 @@ int drm_mode_list_lessees_ioctl(struct drm_device *dev,
  * drm_mode_get_lease_ioctl - list leased objects
  * @dev: the drm device
  * @data: pointer to struct drm_mode_get_lease
- * @file_priv: the file being manipulated
+ * @lessee_priv: the file being manipulated
  *
  * Return the list of leased objects for the specified lessee
  */
@@ -722,7 +722,7 @@ int drm_mode_get_lease_ioctl(struct drm_device *dev,
  * drm_mode_revoke_lease_ioctl - revoke lease
  * @dev: the drm device
  * @data: pointer to struct drm_mode_revoke_lease
- * @file_priv: the file being manipulated
+ * @lessor_priv: the file being manipulated
  *
  * This removes all of the objects from the lease without
  * actually getting rid of the lease itself; that way all

drivers/gpu/drm/drm_modes.c

@@ -1346,9 +1346,9 @@ EXPORT_SYMBOL(drm_mode_connector_list_update);
  * modeline in fb_mode_option will be parsed instead.
  *
  * This uses the same parameters as the fb modedb.c, except for an extra
- * force-enable, force-enable-digital and force-disable bit at the end:
+ * force-enable, force-enable-digital and force-disable bit at the end::
  *
- * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
+ *	<xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
  *
  * The intermediate drm_cmdline_mode structure is required to store additional
  * options from the command line modline like the force-enable/disable flag.

drivers/gpu/drm/drm_simple_kms_helper.c

@@ -34,6 +34,20 @@ static const struct drm_encoder_funcs drm_simple_kms_encoder_funcs = {
 	.destroy = drm_encoder_cleanup,
 };
 
+static enum drm_mode_status
+drm_simple_kms_crtc_mode_valid(struct drm_crtc *crtc,
+			       const struct drm_display_mode *mode)
+{
+	struct drm_simple_display_pipe *pipe;
+
+	pipe = container_of(crtc, struct drm_simple_display_pipe, crtc);
+	if (!pipe->funcs || !pipe->funcs->mode_valid)
+		/* Anything goes */
+		return MODE_OK;
+
+	return pipe->funcs->mode_valid(crtc, mode);
+}
+
 static int drm_simple_kms_crtc_check(struct drm_crtc *crtc,
 				     struct drm_crtc_state *state)
 {
@@ -72,6 +86,7 @@ static void drm_simple_kms_crtc_disable(struct drm_crtc *crtc,
 }
 
 static const struct drm_crtc_helper_funcs drm_simple_kms_crtc_helper_funcs = {
+	.mode_valid = drm_simple_kms_crtc_mode_valid,
 	.atomic_check = drm_simple_kms_crtc_check,
 	.atomic_enable = drm_simple_kms_crtc_enable,
 	.atomic_disable = drm_simple_kms_crtc_disable,

drivers/gpu/drm/drm_syncobj.c

@@ -546,7 +546,7 @@ static int drm_syncobj_export_sync_file(struct drm_file *file_private,
 void
 drm_syncobj_open(struct drm_file *file_private)
 {
-	idr_init(&file_private->syncobj_idr);
+	idr_init_base(&file_private->syncobj_idr, 1);
 	spin_lock_init(&file_private->syncobj_table_lock);
 }
 

drivers/gpu/drm/imx/dw_hdmi-imx.c

@@ -25,6 +25,7 @@
 struct imx_hdmi {
 	struct device *dev;
 	struct drm_encoder encoder;
+	struct dw_hdmi *hdmi;
 	struct regmap *regmap;
 };
 
@@ -239,14 +240,18 @@ static int dw_hdmi_imx_bind(struct device *dev, struct device *master,
 	drm_encoder_init(drm, encoder, &dw_hdmi_imx_encoder_funcs,
 			 DRM_MODE_ENCODER_TMDS, NULL);
 
-	ret = dw_hdmi_bind(pdev, encoder, plat_data);
+	platform_set_drvdata(pdev, hdmi);
+
+	hdmi->hdmi = dw_hdmi_bind(pdev, encoder, plat_data);
 
 	/*
 	 * If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(),
 	 * which would have called the encoder cleanup.  Do it manually.
 	 */
-	if (ret)
+	if (IS_ERR(hdmi->hdmi)) {
+		ret = PTR_ERR(hdmi->hdmi);
 		drm_encoder_cleanup(encoder);
+	}
 
 	return ret;
 }
@@ -254,7 +259,9 @@ static int dw_hdmi_imx_bind(struct device *dev, struct device *master,
 static void dw_hdmi_imx_unbind(struct device *dev, struct device *master,
 			       void *data)
 {
-	return dw_hdmi_unbind(dev);
+	struct imx_hdmi *hdmi = dev_get_drvdata(dev);
+
+	dw_hdmi_unbind(hdmi->hdmi);
 }
 
 static const struct component_ops dw_hdmi_imx_ops = {

drivers/gpu/drm/meson/meson_dw_hdmi.c

@@ -140,6 +140,7 @@ struct meson_dw_hdmi {
 	struct clk *venci_clk;
 	struct regulator *hdmi_supply;
 	u32 irq_stat;
+	struct dw_hdmi *hdmi;
 };
 #define encoder_to_meson_dw_hdmi(x) \
 	container_of(x, struct meson_dw_hdmi, encoder)
@@ -302,7 +303,7 @@ static void meson_hdmi_phy_setup_mode(struct meson_dw_hdmi *dw_hdmi,
 	}
 }
 
-static inline void dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
+static inline void meson_dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
 {
 	struct meson_drm *priv = dw_hdmi->priv;
 
@@ -409,9 +410,9 @@ static int dw_hdmi_phy_init(struct dw_hdmi *hdmi, void *data,
 	msleep(100);
 
 	/* Reset PHY 3 times in a row */
-	dw_hdmi_phy_reset(dw_hdmi);
-	dw_hdmi_phy_reset(dw_hdmi);
-	dw_hdmi_phy_reset(dw_hdmi);
+	meson_dw_hdmi_phy_reset(dw_hdmi);
+	meson_dw_hdmi_phy_reset(dw_hdmi);
+	meson_dw_hdmi_phy_reset(dw_hdmi);
 
 	/* Temporary Disable VENC video stream */
 	if (priv->venc.hdmi_use_enci)
@@ -878,9 +879,12 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
 	dw_plat_data->input_bus_format = MEDIA_BUS_FMT_YUV8_1X24;
 	dw_plat_data->input_bus_encoding = V4L2_YCBCR_ENC_709;
 
-	ret = dw_hdmi_bind(pdev, encoder, &meson_dw_hdmi->dw_plat_data);
-	if (ret)
-		return ret;
+	platform_set_drvdata(pdev, meson_dw_hdmi);
+
+	meson_dw_hdmi->hdmi = dw_hdmi_bind(pdev, encoder,
+					   &meson_dw_hdmi->dw_plat_data);
+	if (IS_ERR(meson_dw_hdmi->hdmi))
+		return PTR_ERR(meson_dw_hdmi->hdmi);
 
 	DRM_DEBUG_DRIVER("HDMI controller initialized\n");
 
@@ -890,7 +894,9 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
 static void meson_dw_hdmi_unbind(struct device *dev, struct device *master,
 				   void *data)
 {
-	dw_hdmi_unbind(dev);
+	struct meson_dw_hdmi *meson_dw_hdmi = dev_get_drvdata(dev);
+
+	dw_hdmi_unbind(meson_dw_hdmi->hdmi);
 }
 
 static const struct component_ops meson_dw_hdmi_ops = {

drivers/gpu/drm/omapdrm/displays/panel-dpi.c

@@ -87,11 +87,7 @@ static int panel_dpi_enable(struct omap_dss_device *dssdev)
 	}
 
 	gpiod_set_value_cansleep(ddata->enable_gpio, 1);
-
-	if (ddata->backlight) {
-		ddata->backlight->props.power = FB_BLANK_UNBLANK;
-		backlight_update_status(ddata->backlight);
-	}
+	backlight_enable(ddata->backlight);
 
 	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 
@@ -106,10 +102,7 @@ static void panel_dpi_disable(struct omap_dss_device *dssdev)
 	if (!omapdss_device_is_enabled(dssdev))
 		return;
 
-	if (ddata->backlight) {
-		ddata->backlight->props.power = FB_BLANK_POWERDOWN;
-		backlight_update_status(ddata->backlight);
-	}
+	backlight_disable(ddata->backlight);
 
 	gpiod_set_value_cansleep(ddata->enable_gpio, 0);
 	regulator_disable(ddata->vcc_supply);
@@ -164,7 +157,6 @@ static int panel_dpi_probe_of(struct platform_device *pdev)
 {
 	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 	struct device_node *node = pdev->dev.of_node;
-	struct device_node *bl_node;
 	struct omap_dss_device *in;
 	int r;
 	struct display_timing timing;
@@ -190,19 +182,15 @@ static int panel_dpi_probe_of(struct platform_device *pdev)
 	if (IS_ERR(ddata->vcc_supply))
 		return PTR_ERR(ddata->vcc_supply);
 
-	bl_node = of_parse_phandle(node, "backlight", 0);
-	if (bl_node) {
-		ddata->backlight = of_find_backlight_by_node(bl_node);
-		of_node_put(bl_node);
+	ddata->backlight = devm_of_find_backlight(&pdev->dev);
 
-		if (!ddata->backlight)
-			return -EPROBE_DEFER;
-	}
+	if (IS_ERR(ddata->backlight))
+		return PTR_ERR(ddata->backlight);
 
 	r = of_get_display_timing(node, "panel-timing", &timing);
 	if (r) {
 		dev_err(&pdev->dev, "failed to get video timing\n");
-		goto error_free_backlight;
+		return r;
 	}
 
 	videomode_from_timing(&timing, &ddata->vm);
@@ -210,19 +198,12 @@ static int panel_dpi_probe_of(struct platform_device *pdev)
 	in = omapdss_of_find_source_for_first_ep(node);
 	if (IS_ERR(in)) {
 		dev_err(&pdev->dev, "failed to find video source\n");
-		r = PTR_ERR(in);
-		goto error_free_backlight;
+		return PTR_ERR(in);
 	}
 
 	ddata->in = in;
 
 	return 0;
-
-error_free_backlight:
-	if (ddata->backlight)
-		put_device(&ddata->backlight->dev);
-
-	return r;
 }
 
 static int panel_dpi_probe(struct platform_device *pdev)
@@ -277,9 +258,6 @@ static int __exit panel_dpi_remove(struct platform_device *pdev)
 
 	omap_dss_put_device(in);
 
-	if (ddata->backlight)
-		put_device(&ddata->backlight->dev);
-
 	return 0;
 }
 

drivers/gpu/drm/panel/panel-innolux-p079zca.c

@@ -45,8 +45,7 @@ static int innolux_panel_disable(struct drm_panel *panel)
 	if (!innolux->enabled)
 		return 0;
 
-	innolux->backlight->props.power = FB_BLANK_POWERDOWN;
-	backlight_update_status(innolux->backlight);
+	backlight_disable(innolux->backlight);
 
 	err = mipi_dsi_dcs_set_display_off(innolux->link);
 	if (err < 0)
@@ -151,8 +150,7 @@ static int innolux_panel_enable(struct drm_panel *panel)
 	if (innolux->enabled)
 		return 0;
 
-	innolux->backlight->props.power = FB_BLANK_UNBLANK;
-	ret = backlight_update_status(innolux->backlight);
+	ret = backlight_enable(innolux->backlight);
 	if (ret) {
 		DRM_DEV_ERROR(panel->drm->dev,
 			      "Failed to enable backlight %d\n", ret);
@@ -217,7 +215,6 @@ MODULE_DEVICE_TABLE(of, innolux_of_match);
 static int innolux_panel_add(struct innolux_panel *innolux)
 {
 	struct device *dev = &innolux->link->dev;
-	struct device_node *np;
 	int err;
 
 	innolux->supply = devm_regulator_get(dev, "power");
@@ -232,37 +229,22 @@ static int innolux_panel_add(struct innolux_panel *innolux)
 		innolux->enable_gpio = NULL;
 	}
 
-	np = of_parse_phandle(dev->of_node, "backlight", 0);
-	if (np) {
-		innolux->backlight = of_find_backlight_by_node(np);
-		of_node_put(np);
+	innolux->backlight = devm_of_find_backlight(dev);
 
-		if (!innolux->backlight)
-			return -EPROBE_DEFER;
-	}
+	if (IS_ERR(innolux->backlight))
+		return PTR_ERR(innolux->backlight);
 
 	drm_panel_init(&innolux->base);
 	innolux->base.funcs = &innolux_panel_funcs;
 	innolux->base.dev = &innolux->link->dev;
 
-	err = drm_panel_add(&innolux->base);
-	if (err < 0)
-		goto put_backlight;
-
-	return 0;
-
-put_backlight:
-	put_device(&innolux->backlight->dev);
-
-	return err;
+	return drm_panel_add(&innolux->base);
 }
 
 static void innolux_panel_del(struct innolux_panel *innolux)
 {
 	if (innolux->base.dev)
 		drm_panel_remove(&innolux->base);
-
-	put_device(&innolux->backlight->dev);
 }
 
 static int innolux_panel_probe(struct mipi_dsi_device *dsi)

drivers/gpu/drm/panel/panel-jdi-lt070me05000.c

@@ -192,8 +192,7 @@ static int jdi_panel_disable(struct drm_panel *panel)
 	if (!jdi->enabled)
 		return 0;
 
-	jdi->backlight->props.power = FB_BLANK_POWERDOWN;
-	backlight_update_status(jdi->backlight);
+	backlight_disable(jdi->backlight);
 
 	jdi->enabled = false;
 
@@ -289,8 +288,7 @@ static int jdi_panel_enable(struct drm_panel *panel)
 	if (jdi->enabled)
 		return 0;
 
-	jdi->backlight->props.power = FB_BLANK_UNBLANK;
-	backlight_update_status(jdi->backlight);
+	backlight_enable(jdi->backlight);
 
 	jdi->enabled = true;
 

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

@@ -96,10 +96,7 @@ static int sharp_panel_disable(struct drm_panel *panel)
 	if (!sharp->enabled)
 		return 0;
 
-	if (sharp->backlight) {
-		sharp->backlight->props.power = FB_BLANK_POWERDOWN;
-		backlight_update_status(sharp->backlight);
-	}
+	backlight_disable(sharp->backlight);
 
 	sharp->enabled = false;
 
@@ -263,10 +260,7 @@ static int sharp_panel_enable(struct drm_panel *panel)
 	if (sharp->enabled)
 		return 0;
 
-	if (sharp->backlight) {
-		sharp->backlight->props.power = FB_BLANK_UNBLANK;
-		backlight_update_status(sharp->backlight);
-	}
+	backlight_enable(sharp->backlight);
 
 	sharp->enabled = true;
 
@@ -324,8 +318,7 @@ MODULE_DEVICE_TABLE(of, sharp_of_match);
 
 static int sharp_panel_add(struct sharp_panel *sharp)
 {
-	struct device_node *np;
-	int err;
+	struct device *dev = &sharp->link1->dev;
 
 	sharp->mode = &default_mode;
 
@@ -333,30 +326,16 @@ static int sharp_panel_add(struct sharp_panel *sharp)
 	if (IS_ERR(sharp->supply))
 		return PTR_ERR(sharp->supply);
 
-	np = of_parse_phandle(sharp->link1->dev.of_node, "backlight", 0);
-	if (np) {
-		sharp->backlight = of_find_backlight_by_node(np);
-		of_node_put(np);
+	sharp->backlight = devm_of_find_backlight(dev);
 
-		if (!sharp->backlight)
-			return -EPROBE_DEFER;
-	}
+	if (IS_ERR(sharp->backlight))
+		return PTR_ERR(sharp->backlight);
 
 	drm_panel_init(&sharp->base);
 	sharp->base.funcs = &sharp_panel_funcs;
 	sharp->base.dev = &sharp->link1->dev;
 
-	err = drm_panel_add(&sharp->base);
-	if (err < 0)
-		goto put_backlight;
-
-	return 0;
-
-put_backlight:
-	if (sharp->backlight)
-		put_device(&sharp->backlight->dev);
-
-	return err;
+	return drm_panel_add(&sharp->base);
 }
 
 static void sharp_panel_del(struct sharp_panel *sharp)
@@ -364,9 +343,6 @@ static void sharp_panel_del(struct sharp_panel *sharp)
 	if (sharp->base.dev)
 		drm_panel_remove(&sharp->base);
 
-	if (sharp->backlight)
-		put_device(&sharp->backlight->dev);
-
 	if (sharp->link2)
 		put_device(&sharp->link2->dev);
 }

drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c

@@ -117,10 +117,7 @@ static int sharp_nt_panel_disable(struct drm_panel *panel)
 	if (!sharp_nt->enabled)
 		return 0;
 
-	if (sharp_nt->backlight) {
-		sharp_nt->backlight->props.power = FB_BLANK_POWERDOWN;
-		backlight_update_status(sharp_nt->backlight);
-	}
+	backlight_disable(sharp_nt->backlight);
 
 	sharp_nt->enabled = false;
 
@@ -203,10 +200,7 @@ static int sharp_nt_panel_enable(struct drm_panel *panel)
 	if (sharp_nt->enabled)
 		return 0;
 
-	if (sharp_nt->backlight) {
-		sharp_nt->backlight->props.power = FB_BLANK_UNBLANK;
-		backlight_update_status(sharp_nt->backlight);
-	}
+	backlight_enable(sharp_nt->backlight);
 
 	sharp_nt->enabled = true;
 
@@ -259,8 +253,6 @@ static const struct drm_panel_funcs sharp_nt_panel_funcs = {
 static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)
 {
 	struct device *dev = &sharp_nt->dsi->dev;
-	struct device_node *np;
-	int ret;
 
 	sharp_nt->mode = &default_mode;
 
@@ -277,39 +269,22 @@ static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)
 		gpiod_set_value(sharp_nt->reset_gpio, 0);
 	}
 
-	np = of_parse_phandle(dev->of_node, "backlight", 0);
-	if (np) {
-		sharp_nt->backlight = of_find_backlight_by_node(np);
-		of_node_put(np);
+	sharp_nt->backlight = devm_of_find_backlight(dev);
 
-		if (!sharp_nt->backlight)
-			return -EPROBE_DEFER;
-	}
+	if (IS_ERR(sharp_nt->backlight))
+		return PTR_ERR(sharp_nt->backlight);
 
 	drm_panel_init(&sharp_nt->base);
 	sharp_nt->base.funcs = &sharp_nt_panel_funcs;
 	sharp_nt->base.dev = &sharp_nt->dsi->dev;
 
-	ret = drm_panel_add(&sharp_nt->base);
-	if (ret < 0)
-		goto put_backlight;
-
-	return 0;
-
-put_backlight:
-	if (sharp_nt->backlight)
-		put_device(&sharp_nt->backlight->dev);
-
-	return ret;
+	return drm_panel_add(&sharp_nt->base);
 }
 
 static void sharp_nt_panel_del(struct sharp_nt_panel *sharp_nt)
 {
 	if (sharp_nt->base.dev)
 		drm_panel_remove(&sharp_nt->base);
-
-	if (sharp_nt->backlight)
-		put_device(&sharp_nt->backlight->dev);
 }
 
 static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi)

drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c

@@ -68,12 +68,22 @@ static const struct dw_hdmi_plat_data rcar_dw_hdmi_plat_data = {
 
 static int rcar_dw_hdmi_probe(struct platform_device *pdev)
 {
-	return dw_hdmi_probe(pdev, &rcar_dw_hdmi_plat_data);
+	struct dw_hdmi *hdmi;
+
+	hdmi = dw_hdmi_probe(pdev, &rcar_dw_hdmi_plat_data);
+	if (IS_ERR(hdmi))
+		return PTR_ERR(hdmi);
+
+	platform_set_drvdata(pdev, hdmi);
+
+	return 0;
 }
 
 static int rcar_dw_hdmi_remove(struct platform_device *pdev)
 {
-	dw_hdmi_remove(pdev);
+	struct dw_hdmi *hdmi = platform_get_drvdata(pdev);
+
+	dw_hdmi_remove(hdmi);
 
 	return 0;
 }

drivers/gpu/drm/rockchip/dw-mipi-dsi.c

@@ -1202,9 +1202,6 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
 		return ret;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -ENODEV;
-
 	dsi->base = devm_ioremap_resource(dev, res);
 	if (IS_ERR(dsi->base))
 		return PTR_ERR(dsi->base);

drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c

@@ -48,6 +48,7 @@ struct rockchip_hdmi {
 	const struct rockchip_hdmi_chip_data *chip_data;
 	struct clk *vpll_clk;
 	struct clk *grf_clk;
+	struct dw_hdmi *hdmi;
 };
 
 #define to_rockchip_hdmi(x)	container_of(x, struct rockchip_hdmi, x)
@@ -377,14 +378,18 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
 	drm_encoder_init(drm, encoder, &dw_hdmi_rockchip_encoder_funcs,
 			 DRM_MODE_ENCODER_TMDS, NULL);
 
-	ret = dw_hdmi_bind(pdev, encoder, plat_data);
+	platform_set_drvdata(pdev, hdmi);
+
+	hdmi->hdmi = dw_hdmi_bind(pdev, encoder, plat_data);
 
 	/*
 	 * If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(),
 	 * which would have called the encoder cleanup.  Do it manually.
 	 */
-	if (ret)
+	if (IS_ERR(hdmi->hdmi)) {
+		ret = PTR_ERR(hdmi->hdmi);
 		drm_encoder_cleanup(encoder);
+	}
 
 	return ret;
 }
@@ -392,7 +397,9 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
 static void dw_hdmi_rockchip_unbind(struct device *dev, struct device *master,
 				    void *data)
 {
-	return dw_hdmi_unbind(dev);
+	struct rockchip_hdmi *hdmi = dev_get_drvdata(dev);
+
+	dw_hdmi_unbind(hdmi->hdmi);
 }
 
 static const struct component_ops dw_hdmi_rockchip_ops = {

drivers/gpu/drm/rockchip/inno_hdmi.c

@@ -831,9 +831,6 @@ static int inno_hdmi_bind(struct device *dev, struct device *master,
 	hdmi->drm_dev = drm;
 
 	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!iores)
-		return -ENXIO;
-
 	hdmi->regs = devm_ioremap_resource(dev, iores);
 	if (IS_ERR(hdmi->regs))
 		return PTR_ERR(hdmi->regs);

drivers/gpu/drm/rockchip/rockchip_drm_drv.c

@@ -230,6 +230,7 @@ static struct drm_driver rockchip_drm_driver = {
 	.gem_prime_import	= drm_gem_prime_import,
 	.gem_prime_export	= drm_gem_prime_export,
 	.gem_prime_get_sg_table	= rockchip_gem_prime_get_sg_table,
+	.gem_prime_import_sg_table	= rockchip_gem_prime_import_sg_table,
 	.gem_prime_vmap		= rockchip_gem_prime_vmap,
 	.gem_prime_vunmap	= rockchip_gem_prime_vunmap,
 	.gem_prime_mmap		= rockchip_gem_mmap_buf,

drivers/gpu/drm/rockchip/rockchip_drm_gem.c

@@ -16,6 +16,8 @@
 #include <drm/drmP.h>
 #include <drm/drm_gem.h>
 #include <drm/drm_vma_manager.h>
+
+#include <linux/dma-buf.h>
 #include <linux/iommu.h>
 
 #include "rockchip_drm_drv.h"
@@ -262,7 +264,6 @@ static int rockchip_drm_gem_object_mmap(struct drm_gem_object *obj,
 	 * VM_PFNMAP flag that was set by drm_gem_mmap_obj()/drm_gem_mmap().
 	 */
 	vma->vm_flags &= ~VM_PFNMAP;
-	vma->vm_pgoff = 0;
 
 	if (rk_obj->pages)
 		ret = rockchip_drm_gem_object_mmap_iommu(obj, vma);
@@ -297,6 +298,12 @@ int rockchip_gem_mmap(struct file *filp, struct vm_area_struct *vma)
 	if (ret)
 		return ret;
 
+	/*
+	 * Set vm_pgoff (used as a fake buffer offset by DRM) to 0 and map the
+	 * whole buffer from the start.
+	 */
+	vma->vm_pgoff = 0;
+
 	obj = vma->vm_private_data;
 
 	return rockchip_drm_gem_object_mmap(obj, vma);
@@ -309,12 +316,10 @@ static void rockchip_gem_release_object(struct rockchip_gem_object *rk_obj)
 }
 
 struct rockchip_gem_object *
-	rockchip_gem_create_object(struct drm_device *drm, unsigned int size,
-				   bool alloc_kmap)
+	rockchip_gem_alloc_object(struct drm_device *drm, unsigned int size)
 {
 	struct rockchip_gem_object *rk_obj;
 	struct drm_gem_object *obj;
-	int ret;
 
 	size = round_up(size, PAGE_SIZE);
 
@@ -326,6 +331,20 @@ struct rockchip_gem_object *
 
 	drm_gem_object_init(drm, obj, size);
 
+	return rk_obj;
+}
+
+struct rockchip_gem_object *
+rockchip_gem_create_object(struct drm_device *drm, unsigned int size,
+			   bool alloc_kmap)
+{
+	struct rockchip_gem_object *rk_obj;
+	int ret;
+
+	rk_obj = rockchip_gem_alloc_object(drm, size);
+	if (IS_ERR(rk_obj))
+		return rk_obj;
+
 	ret = rockchip_gem_alloc_buf(rk_obj, alloc_kmap);
 	if (ret)
 		goto err_free_rk_obj;
@@ -343,11 +362,21 @@ struct rockchip_gem_object *
  */
 void rockchip_gem_free_object(struct drm_gem_object *obj)
 {
-	struct rockchip_gem_object *rk_obj;
-
-	rk_obj = to_rockchip_obj(obj);
+	struct drm_device *drm = obj->dev;
+	struct rockchip_drm_private *private = drm->dev_private;
+	struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
 
-	rockchip_gem_free_buf(rk_obj);
+	if (obj->import_attach) {
+		if (private->domain) {
+			rockchip_gem_iommu_unmap(rk_obj);
+		} else {
+			dma_unmap_sg(drm->dev, rk_obj->sgt->sgl,
+				     rk_obj->sgt->nents, DMA_BIDIRECTIONAL);
+		}
+		drm_prime_gem_destroy(obj, rk_obj->sgt);
+	} else {
+		rockchip_gem_free_buf(rk_obj);
+	}
 
 	rockchip_gem_release_object(rk_obj);
 }
@@ -451,6 +480,86 @@ struct sg_table *rockchip_gem_prime_get_sg_table(struct drm_gem_object *obj)
 	return sgt;
 }
 
+static unsigned long rockchip_sg_get_contiguous_size(struct sg_table *sgt,
+						     int count)
+{
+	struct scatterlist *s;
+	dma_addr_t expected = sg_dma_address(sgt->sgl);
+	unsigned int i;
+	unsigned long size = 0;
+
+	for_each_sg(sgt->sgl, s, count, i) {
+		if (sg_dma_address(s) != expected)
+			break;
+		expected = sg_dma_address(s) + sg_dma_len(s);
+		size += sg_dma_len(s);
+	}
+	return size;
+}
+
+static int
+rockchip_gem_iommu_map_sg(struct drm_device *drm,
+			  struct dma_buf_attachment *attach,
+			  struct sg_table *sg,
+			  struct rockchip_gem_object *rk_obj)
+{
+	rk_obj->sgt = sg;
+	return rockchip_gem_iommu_map(rk_obj);
+}
+
+static int
+rockchip_gem_dma_map_sg(struct drm_device *drm,
+			struct dma_buf_attachment *attach,
+			struct sg_table *sg,
+			struct rockchip_gem_object *rk_obj)
+{
+	int count = dma_map_sg(drm->dev, sg->sgl, sg->nents,
+			       DMA_BIDIRECTIONAL);
+	if (!count)
+		return -EINVAL;
+
+	if (rockchip_sg_get_contiguous_size(sg, count) < attach->dmabuf->size) {
+		DRM_ERROR("failed to map sg_table to contiguous linear address.\n");
+		dma_unmap_sg(drm->dev, sg->sgl, sg->nents,
+			     DMA_BIDIRECTIONAL);
+		return -EINVAL;
+	}
+
+	rk_obj->dma_addr = sg_dma_address(sg->sgl);
+	rk_obj->sgt = sg;
+	return 0;
+}
+
+struct drm_gem_object *
+rockchip_gem_prime_import_sg_table(struct drm_device *drm,
+				   struct dma_buf_attachment *attach,
+				   struct sg_table *sg)
+{
+	struct rockchip_drm_private *private = drm->dev_private;
+	struct rockchip_gem_object *rk_obj;
+	int ret;
+
+	rk_obj = rockchip_gem_alloc_object(drm, attach->dmabuf->size);
+	if (IS_ERR(rk_obj))
+		return ERR_CAST(rk_obj);
+
+	if (private->domain)
+		ret = rockchip_gem_iommu_map_sg(drm, attach, sg, rk_obj);
+	else
+		ret = rockchip_gem_dma_map_sg(drm, attach, sg, rk_obj);
+
+	if (ret < 0) {
+		DRM_ERROR("failed to import sg table: %d\n", ret);
+		goto err_free_rk_obj;
+	}
+
+	return &rk_obj->base;
+
+err_free_rk_obj:
+	rockchip_gem_release_object(rk_obj);
+	return ERR_PTR(ret);
+}
+
 void *rockchip_gem_prime_vmap(struct drm_gem_object *obj)
 {
 	struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);

drivers/gpu/drm/rockchip/rockchip_drm_gem.h

@@ -36,8 +36,9 @@ struct rockchip_gem_object {
 
 struct sg_table *rockchip_gem_prime_get_sg_table(struct drm_gem_object *obj);
 struct drm_gem_object *
-rockchip_gem_prime_import_sg_table(struct drm_device *dev, size_t size,
-				   struct sg_table *sgt);
+rockchip_gem_prime_import_sg_table(struct drm_device *dev,
+				   struct dma_buf_attachment *attach,
+				   struct sg_table *sg);
 void *rockchip_gem_prime_vmap(struct drm_gem_object *obj);
 void rockchip_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
 

drivers/gpu/drm/rockchip/rockchip_drm_vop.c

@@ -95,9 +95,6 @@ struct vop {
 	struct drm_device *drm_dev;
 	bool is_enabled;
 
-	/* mutex vsync_ work */
-	struct mutex vsync_mutex;
-	bool vsync_work_pending;
 	struct completion dsp_hold_completion;
 
 	/* protected by dev->event_lock */
@@ -1555,8 +1552,6 @@ static int vop_bind(struct device *dev, struct device *master, void *data)
 	spin_lock_init(&vop->reg_lock);
 	spin_lock_init(&vop->irq_lock);
 
-	mutex_init(&vop->vsync_mutex);
-
 	ret = devm_request_irq(dev, vop->irq, vop_isr,
 			       IRQF_SHARED, dev_name(dev), vop);
 	if (ret)

drivers/gpu/drm/sun4i/Kconfig

@@ -40,6 +40,15 @@ config DRM_SUN4I_BACKEND
 	  do some alpha blending and feed graphics to TCON. If M is
 	  selected the module will be called sun4i-backend.
 
+config DRM_SUN8I_DW_HDMI
+	tristate "Support for Allwinner version of DesignWare HDMI"
+	depends on DRM_SUN4I
+	select DRM_DW_HDMI
+	help
+	  Choose this option if you have an Allwinner SoC with the
+	  DesignWare HDMI controller with custom HDMI PHY. If M is
+	  selected the module will be called sun8i_dw_hdmi.
+
 config DRM_SUN8I_MIXER
 	tristate "Support for Allwinner Display Engine 2.0 Mixer"
 	default MACH_SUN8I

drivers/gpu/drm/sun4i/Makefile

@@ -10,6 +10,9 @@ sun4i-drm-hdmi-y		+= sun4i_hdmi_enc.o
 sun4i-drm-hdmi-y		+= sun4i_hdmi_i2c.o
 sun4i-drm-hdmi-y		+= sun4i_hdmi_tmds_clk.o
 
+sun8i-drm-hdmi-y		+= sun8i_dw_hdmi.o
+sun8i-drm-hdmi-y		+= sun8i_hdmi_phy.o
+
 sun8i-mixer-y			+= sun8i_mixer.o sun8i_ui_layer.o \
 				   sun8i_vi_layer.o sun8i_ui_scaler.o \
 				   sun8i_vi_scaler.o sun8i_csc.o
@@ -27,4 +30,5 @@ obj-$(CONFIG_DRM_SUN4I)		+= sun6i_drc.o
 
 obj-$(CONFIG_DRM_SUN4I_BACKEND)	+= sun4i-backend.o sun4i-frontend.o
 obj-$(CONFIG_DRM_SUN4I_HDMI)	+= sun4i-drm-hdmi.o
+obj-$(CONFIG_DRM_SUN8I_DW_HDMI)	+= sun8i-drm-hdmi.o
 obj-$(CONFIG_DRM_SUN8I_MIXER)	+= sun8i-mixer.o

drivers/gpu/drm/sun4i/sun4i_tcon.c

@@ -84,6 +84,7 @@ static void sun4i_tcon_channel_set_status(struct sun4i_tcon *tcon, int channel,
 
 	switch (channel) {
 	case 0:
+		WARN_ON(!tcon->quirks->has_channel_0);
 		regmap_update_bits(tcon->regs, SUN4I_TCON0_CTL_REG,
 				   SUN4I_TCON0_CTL_TCON_ENABLE,
 				   enabled ? SUN4I_TCON0_CTL_TCON_ENABLE : 0);
@@ -276,6 +277,8 @@ static void sun4i_tcon0_mode_set_lvds(struct sun4i_tcon *tcon,
 	u8 clk_delay;
 	u32 reg, val = 0;
 
+	WARN_ON(!tcon->quirks->has_channel_0);
+
 	tcon->dclk_min_div = 7;
 	tcon->dclk_max_div = 7;
 	sun4i_tcon0_mode_set_common(tcon, mode);
@@ -344,6 +347,8 @@ static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon,
 	u8 clk_delay;
 	u32 val = 0;
 
+	WARN_ON(!tcon->quirks->has_channel_0);
+
 	tcon->dclk_min_div = 6;
 	tcon->dclk_max_div = 127;
 	sun4i_tcon0_mode_set_common(tcon, mode);
@@ -389,10 +394,10 @@ static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon,
 		     SUN4I_TCON0_BASIC3_H_SYNC(hsync));
 
 	/* Setup the polarity of the various signals */
-	if (!(mode->flags & DRM_MODE_FLAG_PHSYNC))
+	if (mode->flags & DRM_MODE_FLAG_PHSYNC)
 		val |= SUN4I_TCON0_IO_POL_HSYNC_POSITIVE;
 
-	if (!(mode->flags & DRM_MODE_FLAG_PVSYNC))
+	if (mode->flags & DRM_MODE_FLAG_PVSYNC)
 		val |= SUN4I_TCON0_IO_POL_VSYNC_POSITIVE;
 
 	regmap_update_bits(tcon->regs, SUN4I_TCON0_IO_POL_REG,
@@ -574,10 +579,12 @@ static int sun4i_tcon_init_clocks(struct device *dev,
 	}
 	clk_prepare_enable(tcon->clk);
 
-	tcon->sclk0 = devm_clk_get(dev, "tcon-ch0");
-	if (IS_ERR(tcon->sclk0)) {
-		dev_err(dev, "Couldn't get the TCON channel 0 clock\n");
-		return PTR_ERR(tcon->sclk0);
+	if (tcon->quirks->has_channel_0) {
+		tcon->sclk0 = devm_clk_get(dev, "tcon-ch0");
+		if (IS_ERR(tcon->sclk0)) {
+			dev_err(dev, "Couldn't get the TCON channel 0 clock\n");
+			return PTR_ERR(tcon->sclk0);
+		}
 	}
 
 	if (tcon->quirks->has_channel_1) {
@@ -934,10 +941,12 @@ static int sun4i_tcon_bind(struct device *dev, struct device *master,
 		goto err_free_clocks;
 	}
 
-	ret = sun4i_dclk_create(dev, tcon);
-	if (ret) {
-		dev_err(dev, "Couldn't create our TCON dot clock\n");
-		goto err_free_clocks;
+	if (tcon->quirks->has_channel_0) {
+		ret = sun4i_dclk_create(dev, tcon);
+		if (ret) {
+			dev_err(dev, "Couldn't create our TCON dot clock\n");
+			goto err_free_clocks;
+		}
 	}
 
 	ret = sun4i_tcon_init_irq(dev, tcon);
@@ -995,7 +1004,8 @@ static int sun4i_tcon_bind(struct device *dev, struct device *master,
 	return 0;
 
 err_free_dotclock:
-	sun4i_dclk_free(tcon);
+	if (tcon->quirks->has_channel_0)
+		sun4i_dclk_free(tcon);
 err_free_clocks:
 	sun4i_tcon_free_clocks(tcon);
 err_assert_reset:
@@ -1009,7 +1019,8 @@ static void sun4i_tcon_unbind(struct device *dev, struct device *master,
 	struct sun4i_tcon *tcon = dev_get_drvdata(dev);
 
 	list_del(&tcon->list);
-	sun4i_dclk_free(tcon);
+	if (tcon->quirks->has_channel_0)
+		sun4i_dclk_free(tcon);
 	sun4i_tcon_free_clocks(tcon);
 }
 
@@ -1106,16 +1117,19 @@ static int sun6i_tcon_set_mux(struct sun4i_tcon *tcon,
 }
 
 static const struct sun4i_tcon_quirks sun4i_a10_quirks = {
+	.has_channel_0		= true,
 	.has_channel_1		= true,
 	.set_mux		= sun4i_a10_tcon_set_mux,
 };
 
 static const struct sun4i_tcon_quirks sun5i_a13_quirks = {
+	.has_channel_0		= true,
 	.has_channel_1		= true,
 	.set_mux		= sun5i_a13_tcon_set_mux,
 };
 
 static const struct sun4i_tcon_quirks sun6i_a31_quirks = {
+	.has_channel_0		= true,
 	.has_channel_1		= true,
 	.has_lvds_alt		= true,
 	.needs_de_be_mux	= true,
@@ -1123,26 +1137,33 @@ static const struct sun4i_tcon_quirks sun6i_a31_quirks = {
 };
 
 static const struct sun4i_tcon_quirks sun6i_a31s_quirks = {
+	.has_channel_0		= true,
 	.has_channel_1		= true,
 	.needs_de_be_mux	= true,
 };
 
 static const struct sun4i_tcon_quirks sun7i_a20_quirks = {
+	.has_channel_0		= true,
 	.has_channel_1		= true,
 	/* Same display pipeline structure as A10 */
 	.set_mux		= sun4i_a10_tcon_set_mux,
 };
 
 static const struct sun4i_tcon_quirks sun8i_a33_quirks = {
+	.has_channel_0		= true,
 	.has_lvds_alt		= true,
 };
 
 static const struct sun4i_tcon_quirks sun8i_a83t_lcd_quirks = {
-	/* nothing is supported */
+	.has_channel_0		= true,
+};
+
+static const struct sun4i_tcon_quirks sun8i_a83t_tv_quirks = {
+	.has_channel_1		= true,
 };
 
 static const struct sun4i_tcon_quirks sun8i_v3s_quirks = {
-	/* nothing is supported */
+	.has_channel_0		= true,
 };
 
 /* sun4i_drv uses this list to check if a device node is a TCON */
@@ -1154,6 +1175,7 @@ const struct of_device_id sun4i_tcon_of_table[] = {
 	{ .compatible = "allwinner,sun7i-a20-tcon", .data = &sun7i_a20_quirks },
 	{ .compatible = "allwinner,sun8i-a33-tcon", .data = &sun8i_a33_quirks },
 	{ .compatible = "allwinner,sun8i-a83t-tcon-lcd", .data = &sun8i_a83t_lcd_quirks },
+	{ .compatible = "allwinner,sun8i-a83t-tcon-tv", .data = &sun8i_a83t_tv_quirks },
 	{ .compatible = "allwinner,sun8i-v3s-tcon", .data = &sun8i_v3s_quirks },
 	{ }
 };

drivers/gpu/drm/sun4i/sun4i_tcon.h

@@ -172,6 +172,7 @@
 struct sun4i_tcon;
 
 struct sun4i_tcon_quirks {
+	bool	has_channel_0;	/* a83t does not have channel 0 on second TCON */
 	bool	has_channel_1;	/* a33 does not have channel 1 */
 	bool	has_lvds_alt;	/* Does the LVDS clock have a parent other than the TCON clock? */
 	bool	needs_de_be_mux; /* sun6i needs mux to select backend */

drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c

+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2018 Jernej Skrabec <jernej.skrabec@siol.net>
+ */
+
+#include <linux/component.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <drm/drm_of.h>
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+
+#include "sun8i_dw_hdmi.h"
+
+static void sun8i_dw_hdmi_encoder_mode_set(struct drm_encoder *encoder,
+					   struct drm_display_mode *mode,
+					   struct drm_display_mode *adj_mode)
+{
+	struct sun8i_dw_hdmi *hdmi = encoder_to_sun8i_dw_hdmi(encoder);
+
+	clk_set_rate(hdmi->clk_tmds, mode->crtc_clock * 1000);
+}
+
+static const struct drm_encoder_helper_funcs
+sun8i_dw_hdmi_encoder_helper_funcs = {
+	.mode_set = sun8i_dw_hdmi_encoder_mode_set,
+};
+
+static const struct drm_encoder_funcs sun8i_dw_hdmi_encoder_funcs = {
+	.destroy = drm_encoder_cleanup,
+};
+
+static enum drm_mode_status
+sun8i_dw_hdmi_mode_valid(struct drm_connector *connector,
+			 const struct drm_display_mode *mode)
+{
+	if (mode->clock > 297000)
+		return MODE_CLOCK_HIGH;
+
+	return MODE_OK;
+}
+
+static int sun8i_dw_hdmi_bind(struct device *dev, struct device *master,
+			      void *data)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dw_hdmi_plat_data *plat_data;
+	struct drm_device *drm = data;
+	struct device_node *phy_node;
+	struct drm_encoder *encoder;
+	struct sun8i_dw_hdmi *hdmi;
+	int ret;
+
+	if (!pdev->dev.of_node)
+		return -ENODEV;
+
+	hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
+	if (!hdmi)
+		return -ENOMEM;
+
+	plat_data = &hdmi->plat_data;
+	hdmi->dev = &pdev->dev;
+	encoder = &hdmi->encoder;
+
+	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
+	/*
+	 * If we failed to find the CRTC(s) which this encoder is
+	 * supposed to be connected to, it's because the CRTC has
+	 * not been registered yet.  Defer probing, and hope that
+	 * the required CRTC is added later.
+	 */
+	if (encoder->possible_crtcs == 0)
+		return -EPROBE_DEFER;
+
+	hdmi->rst_ctrl = devm_reset_control_get(dev, "ctrl");
+	if (IS_ERR(hdmi->rst_ctrl)) {
+		dev_err(dev, "Could not get ctrl reset control\n");
+		return PTR_ERR(hdmi->rst_ctrl);
+	}
+
+	hdmi->clk_tmds = devm_clk_get(dev, "tmds");
+	if (IS_ERR(hdmi->clk_tmds)) {
+		dev_err(dev, "Couldn't get the tmds clock\n");
+		return PTR_ERR(hdmi->clk_tmds);
+	}
+
+	ret = reset_control_deassert(hdmi->rst_ctrl);
+	if (ret) {
+		dev_err(dev, "Could not deassert ctrl reset control\n");
+		return ret;
+	}
+
+	ret = clk_prepare_enable(hdmi->clk_tmds);
+	if (ret) {
+		dev_err(dev, "Could not enable tmds clock\n");
+		goto err_assert_ctrl_reset;
+	}
+
+	phy_node = of_parse_phandle(dev->of_node, "phys", 0);
+	if (!phy_node) {
+		dev_err(dev, "Can't found PHY phandle\n");
+		goto err_disable_clk_tmds;
+	}
+
+	ret = sun8i_hdmi_phy_probe(hdmi, phy_node);
+	of_node_put(phy_node);
+	if (ret) {
+		dev_err(dev, "Couldn't get the HDMI PHY\n");
+		goto err_disable_clk_tmds;
+	}
+
+	drm_encoder_helper_add(encoder, &sun8i_dw_hdmi_encoder_helper_funcs);
+	drm_encoder_init(drm, encoder, &sun8i_dw_hdmi_encoder_funcs,
+			 DRM_MODE_ENCODER_TMDS, NULL);
+
+	sun8i_hdmi_phy_init(hdmi->phy);
+
+	plat_data->mode_valid = &sun8i_dw_hdmi_mode_valid;
+	plat_data->phy_ops = sun8i_hdmi_phy_get_ops();
+	plat_data->phy_name = "sun8i_dw_hdmi_phy";
+	plat_data->phy_data = hdmi->phy;
+
+	platform_set_drvdata(pdev, hdmi);
+
+	hdmi->hdmi = dw_hdmi_bind(pdev, encoder, plat_data);
+
+	/*
+	 * If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(),
+	 * which would have called the encoder cleanup.  Do it manually.
+	 */
+	if (IS_ERR(hdmi->hdmi)) {
+		ret = PTR_ERR(hdmi->hdmi);
+		goto cleanup_encoder;
+	}
+
+	return 0;
+
+cleanup_encoder:
+	drm_encoder_cleanup(encoder);
+	sun8i_hdmi_phy_remove(hdmi);
+err_disable_clk_tmds:
+	clk_disable_unprepare(hdmi->clk_tmds);
+err_assert_ctrl_reset:
+	reset_control_assert(hdmi->rst_ctrl);
+
+	return ret;
+}
+
+static void sun8i_dw_hdmi_unbind(struct device *dev, struct device *master,
+				 void *data)
+{
+	struct sun8i_dw_hdmi *hdmi = dev_get_drvdata(dev);
+
+	dw_hdmi_unbind(hdmi->hdmi);
+	sun8i_hdmi_phy_remove(hdmi);
+	clk_disable_unprepare(hdmi->clk_tmds);
+	reset_control_assert(hdmi->rst_ctrl);
+}
+
+static const struct component_ops sun8i_dw_hdmi_ops = {
+	.bind	= sun8i_dw_hdmi_bind,
+	.unbind	= sun8i_dw_hdmi_unbind,
+};
+
+static int sun8i_dw_hdmi_probe(struct platform_device *pdev)
+{
+	return component_add(&pdev->dev, &sun8i_dw_hdmi_ops);
+}
+
+static int sun8i_dw_hdmi_remove(struct platform_device *pdev)
+{
+	component_del(&pdev->dev, &sun8i_dw_hdmi_ops);
+
+	return 0;
+}
+
+static const struct of_device_id sun8i_dw_hdmi_dt_ids[] = {
+	{ .compatible = "allwinner,sun8i-a83t-dw-hdmi" },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, sun8i_dw_hdmi_dt_ids);
+
+struct platform_driver sun8i_dw_hdmi_pltfm_driver = {
+	.probe  = sun8i_dw_hdmi_probe,
+	.remove = sun8i_dw_hdmi_remove,
+	.driver = {
+		.name = "sun8i-dw-hdmi",
+		.of_match_table = sun8i_dw_hdmi_dt_ids,
+	},
+};
+module_platform_driver(sun8i_dw_hdmi_pltfm_driver);
+
+MODULE_AUTHOR("Jernej Skrabec <jernej.skrabec@siol.net>");
+MODULE_DESCRIPTION("Allwinner DW HDMI bridge");
+MODULE_LICENSE("GPL");

drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h

+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2018 Jernej Skrabec <jernej.skrabec@siol.net>
+ */
+
+#ifndef _SUN8I_DW_HDMI_H_
+#define _SUN8I_DW_HDMI_H_
+
+#include <drm/bridge/dw_hdmi.h>
+#include <drm/drm_encoder.h>
+#include <linux/clk.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+
+struct sun8i_hdmi_phy {
+	struct clk		*clk_bus;
+	struct clk		*clk_mod;
+	struct regmap		*regs;
+	struct reset_control	*rst_phy;
+};
+
+struct sun8i_dw_hdmi {
+	struct clk			*clk_tmds;
+	struct device			*dev;
+	struct dw_hdmi			*hdmi;
+	struct drm_encoder		encoder;
+	struct sun8i_hdmi_phy		*phy;
+	struct dw_hdmi_plat_data	plat_data;
+	struct reset_control		*rst_ctrl;
+};
+
+static inline struct sun8i_dw_hdmi *
+encoder_to_sun8i_dw_hdmi(struct drm_encoder *encoder)
+{
+	return container_of(encoder, struct sun8i_dw_hdmi, encoder);
+}
+
+int sun8i_hdmi_phy_probe(struct sun8i_dw_hdmi *hdmi, struct device_node *node);
+void sun8i_hdmi_phy_remove(struct sun8i_dw_hdmi *hdmi);
+
+void sun8i_hdmi_phy_init(struct sun8i_hdmi_phy *phy);
+const struct dw_hdmi_phy_ops *sun8i_hdmi_phy_get_ops(void);
+
+#endif /* _SUN8I_DW_HDMI_H_ */

drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c

+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2018 Jernej Skrabec <jernej.skrabec@siol.net>
+ */
+
+#include <linux/of_address.h>
+
+#include "sun8i_dw_hdmi.h"
+
+#define SUN8I_HDMI_PHY_DBG_CTRL_REG	0x0000
+#define SUN8I_HDMI_PHY_DBG_CTRL_PX_LOCK		BIT(0)
+#define SUN8I_HDMI_PHY_DBG_CTRL_POL_MASK	GENMASK(15, 8)
+#define SUN8I_HDMI_PHY_DBG_CTRL_POL(val)	(val << 8)
+#define SUN8I_HDMI_PHY_DBG_CTRL_ADDR_MASK	GENMASK(23, 16)
+#define SUN8I_HDMI_PHY_DBG_CTRL_ADDR(addr)	(addr << 16)
+
+#define SUN8I_HDMI_PHY_REXT_CTRL_REG	0x0004
+#define SUN8I_HDMI_PHY_REXT_CTRL_REXT_EN	BIT(31)
+
+#define SUN8I_HDMI_PHY_READ_EN_REG	0x0010
+#define SUN8I_HDMI_PHY_READ_EN_MAGIC		0x54524545
+
+#define SUN8I_HDMI_PHY_UNSCRAMBLE_REG	0x0014
+#define SUN8I_HDMI_PHY_UNSCRAMBLE_MAGIC		0x42494E47
+
+/*
+ * Address can be actually any value. Here is set to same value as
+ * it is set in BSP driver.
+ */
+#define I2C_ADDR	0x69
+
+static int sun8i_hdmi_phy_config(struct dw_hdmi *hdmi, void *data,
+				 struct drm_display_mode *mode)
+{
+	struct sun8i_hdmi_phy *phy = (struct sun8i_hdmi_phy *)data;
+	u32 val = 0;
+
+	if ((mode->flags & DRM_MODE_FLAG_NHSYNC) &&
+	    (mode->flags & DRM_MODE_FLAG_NHSYNC)) {
+		val = 0x03;
+	}
+
+	regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_DBG_CTRL_REG,
+			   SUN8I_HDMI_PHY_DBG_CTRL_POL_MASK,
+			   SUN8I_HDMI_PHY_DBG_CTRL_POL(val));
+
+	regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_REXT_CTRL_REG,
+			   SUN8I_HDMI_PHY_REXT_CTRL_REXT_EN,
+			   SUN8I_HDMI_PHY_REXT_CTRL_REXT_EN);
+
+	/* power down */
+	dw_hdmi_phy_gen2_txpwron(hdmi, 0);
+	dw_hdmi_phy_gen2_pddq(hdmi, 1);
+
+	dw_hdmi_phy_reset(hdmi);
+
+	dw_hdmi_phy_gen2_pddq(hdmi, 0);
+
+	dw_hdmi_phy_i2c_set_addr(hdmi, I2C_ADDR);
+
+	/*
+	 * Values are taken from BSP HDMI driver. Although AW didn't
+	 * release any documentation, explanation of this values can
+	 * be found in i.MX 6Dual/6Quad Reference Manual.
+	 */
+	if (mode->crtc_clock <= 27000) {
+		dw_hdmi_phy_i2c_write(hdmi, 0x01e0, 0x06);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x15);
+		dw_hdmi_phy_i2c_write(hdmi, 0x08da, 0x10);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0007, 0x19);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0318, 0x0e);
+		dw_hdmi_phy_i2c_write(hdmi, 0x8009, 0x09);
+	} else if (mode->crtc_clock <= 74250) {
+		dw_hdmi_phy_i2c_write(hdmi, 0x0540, 0x06);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0005, 0x15);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x10);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0007, 0x19);
+		dw_hdmi_phy_i2c_write(hdmi, 0x02b5, 0x0e);
+		dw_hdmi_phy_i2c_write(hdmi, 0x8009, 0x09);
+	} else if (mode->crtc_clock <= 148500) {
+		dw_hdmi_phy_i2c_write(hdmi, 0x04a0, 0x06);
+		dw_hdmi_phy_i2c_write(hdmi, 0x000a, 0x15);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x10);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0002, 0x19);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0021, 0x0e);
+		dw_hdmi_phy_i2c_write(hdmi, 0x8029, 0x09);
+	} else {
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x06);
+		dw_hdmi_phy_i2c_write(hdmi, 0x000f, 0x15);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x10);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0002, 0x19);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x0e);
+		dw_hdmi_phy_i2c_write(hdmi, 0x802b, 0x09);
+	}
+
+	dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x1e);
+	dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x13);
+	dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x17);
+
+	dw_hdmi_phy_gen2_txpwron(hdmi, 1);
+
+	return 0;
+};
+
+static void sun8i_hdmi_phy_disable(struct dw_hdmi *hdmi, void *data)
+{
+	struct sun8i_hdmi_phy *phy = (struct sun8i_hdmi_phy *)data;
+
+	dw_hdmi_phy_gen2_txpwron(hdmi, 0);
+	dw_hdmi_phy_gen2_pddq(hdmi, 1);
+
+	regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_REXT_CTRL_REG,
+			   SUN8I_HDMI_PHY_REXT_CTRL_REXT_EN, 0);
+}
+
+static const struct dw_hdmi_phy_ops sun8i_hdmi_phy_ops = {
+	.init = &sun8i_hdmi_phy_config,
+	.disable = &sun8i_hdmi_phy_disable,
+	.read_hpd = &dw_hdmi_phy_read_hpd,
+	.update_hpd = &dw_hdmi_phy_update_hpd,
+	.setup_hpd = &dw_hdmi_phy_setup_hpd,
+};
+
+void sun8i_hdmi_phy_init(struct sun8i_hdmi_phy *phy)
+{
+	/* enable read access to HDMI controller */
+	regmap_write(phy->regs, SUN8I_HDMI_PHY_READ_EN_REG,
+		     SUN8I_HDMI_PHY_READ_EN_MAGIC);
+
+	/* unscramble register offsets */
+	regmap_write(phy->regs, SUN8I_HDMI_PHY_UNSCRAMBLE_REG,
+		     SUN8I_HDMI_PHY_UNSCRAMBLE_MAGIC);
+
+	regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_DBG_CTRL_REG,
+			   SUN8I_HDMI_PHY_DBG_CTRL_PX_LOCK,
+			   SUN8I_HDMI_PHY_DBG_CTRL_PX_LOCK);
+
+	/*
+	 * Set PHY I2C address. It must match to the address set by
+	 * dw_hdmi_phy_set_slave_addr().
+	 */
+	regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_DBG_CTRL_REG,
+			   SUN8I_HDMI_PHY_DBG_CTRL_ADDR_MASK,
+			   SUN8I_HDMI_PHY_DBG_CTRL_ADDR(I2C_ADDR));
+}
+
+const struct dw_hdmi_phy_ops *sun8i_hdmi_phy_get_ops(void)
+{
+	return &sun8i_hdmi_phy_ops;
+}
+
+static struct regmap_config sun8i_hdmi_phy_regmap_config = {
+	.reg_bits	= 32,
+	.val_bits	= 32,
+	.reg_stride	= 4,
+	.max_register	= SUN8I_HDMI_PHY_UNSCRAMBLE_REG,
+	.name		= "phy"
+};
+
+static const struct of_device_id sun8i_hdmi_phy_of_table[] = {
+	{ .compatible = "allwinner,sun8i-a83t-hdmi-phy" },
+	{ /* sentinel */ }
+};
+
+int sun8i_hdmi_phy_probe(struct sun8i_dw_hdmi *hdmi, struct device_node *node)
+{
+	struct device *dev = hdmi->dev;
+	struct sun8i_hdmi_phy *phy;
+	struct resource res;
+	void __iomem *regs;
+	int ret;
+
+	if (!of_match_node(sun8i_hdmi_phy_of_table, node)) {
+		dev_err(dev, "Incompatible HDMI PHY\n");
+		return -EINVAL;
+	}
+
+	phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
+	if (!phy)
+		return -ENOMEM;
+
+	ret = of_address_to_resource(node, 0, &res);
+	if (ret) {
+		dev_err(dev, "phy: Couldn't get our resources\n");
+		return ret;
+	}
+
+	regs = devm_ioremap_resource(dev, &res);
+	if (IS_ERR(regs)) {
+		dev_err(dev, "Couldn't map the HDMI PHY registers\n");
+		return PTR_ERR(regs);
+	}
+
+	phy->regs = devm_regmap_init_mmio(dev, regs,
+					  &sun8i_hdmi_phy_regmap_config);
+	if (IS_ERR(phy->regs)) {
+		dev_err(dev, "Couldn't create the HDMI PHY regmap\n");
+		return PTR_ERR(phy->regs);
+	}
+
+	phy->clk_bus = of_clk_get_by_name(node, "bus");
+	if (IS_ERR(phy->clk_bus)) {
+		dev_err(dev, "Could not get bus clock\n");
+		return PTR_ERR(phy->clk_bus);
+	}
+
+	phy->clk_mod = of_clk_get_by_name(node, "mod");
+	if (IS_ERR(phy->clk_mod)) {
+		dev_err(dev, "Could not get mod clock\n");
+		ret = PTR_ERR(phy->clk_mod);
+		goto err_put_clk_bus;
+	}
+
+	phy->rst_phy = of_reset_control_get_shared(node, "phy");
+	if (IS_ERR(phy->rst_phy)) {
+		dev_err(dev, "Could not get phy reset control\n");
+		ret = PTR_ERR(phy->rst_phy);
+		goto err_put_clk_mod;
+	}
+
+	ret = reset_control_deassert(phy->rst_phy);
+	if (ret) {
+		dev_err(dev, "Cannot deassert phy reset control: %d\n", ret);
+		goto err_put_rst_phy;
+	}
+
+	ret = clk_prepare_enable(phy->clk_bus);
+	if (ret) {
+		dev_err(dev, "Cannot enable bus clock: %d\n", ret);
+		goto err_deassert_rst_phy;
+	}
+
+	ret = clk_prepare_enable(phy->clk_mod);
+	if (ret) {
+		dev_err(dev, "Cannot enable mod clock: %d\n", ret);
+		goto err_disable_clk_bus;
+	}
+
+	hdmi->phy = phy;
+
+	return 0;
+
+err_disable_clk_bus:
+	clk_disable_unprepare(phy->clk_bus);
+err_deassert_rst_phy:
+	reset_control_assert(phy->rst_phy);
+err_put_rst_phy:
+	reset_control_put(phy->rst_phy);
+err_put_clk_mod:
+	clk_put(phy->clk_mod);
+err_put_clk_bus:
+	clk_put(phy->clk_bus);
+
+	return ret;
+}
+
+void sun8i_hdmi_phy_remove(struct sun8i_dw_hdmi *hdmi)
+{
+	struct sun8i_hdmi_phy *phy = hdmi->phy;
+
+	clk_disable_unprepare(phy->clk_mod);
+	clk_disable_unprepare(phy->clk_bus);
+
+	reset_control_assert(phy->rst_phy);
+
+	reset_control_put(phy->rst_phy);
+
+	clk_put(phy->clk_mod);
+	clk_put(phy->clk_bus);
+}

drivers/gpu/drm/sun4i/sun8i_mixer.c

@@ -485,6 +485,13 @@ static const struct sun8i_mixer_cfg sun8i_a83t_mixer0_cfg = {
 	.vi_num		= 1,
 };
 
+static const struct sun8i_mixer_cfg sun8i_a83t_mixer1_cfg = {
+	.ccsc		= 1,
+	.scaler_mask	= 0x3,
+	.ui_num		= 1,
+	.vi_num		= 1,
+};
+
 static const struct sun8i_mixer_cfg sun8i_v3s_mixer_cfg = {
 	.vi_num = 2,
 	.ui_num = 1,
@@ -498,6 +505,10 @@ static const struct of_device_id sun8i_mixer_of_table[] = {
 		.compatible = "allwinner,sun8i-a83t-de2-mixer-0",
 		.data = &sun8i_a83t_mixer0_cfg,
 	},
+	{
+		.compatible = "allwinner,sun8i-a83t-de2-mixer-1",
+		.data = &sun8i_a83t_mixer1_cfg,
+	},
 	{
 		.compatible = "allwinner,sun8i-v3s-de2-mixer",
 		.data = &sun8i_v3s_mixer_cfg,

drivers/gpu/drm/tinydrm/Kconfig

@@ -3,8 +3,6 @@ menuconfig DRM_TINYDRM
 	depends on DRM
 	select DRM_KMS_HELPER
 	select DRM_KMS_CMA_HELPER
-	select BACKLIGHT_LCD_SUPPORT
-	select BACKLIGHT_CLASS_DEVICE
 	help
 	  Choose this option if you have a tinydrm supported display.
 	  If M is selected the module will be called tinydrm.

drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c

@@ -236,101 +236,6 @@ void tinydrm_xrgb8888_to_gray8(u8 *dst, void *vaddr, struct drm_framebuffer *fb,
 }
 EXPORT_SYMBOL(tinydrm_xrgb8888_to_gray8);
 
-/**
- * tinydrm_of_find_backlight - Find backlight device in device-tree
- * @dev: Device
- *
- * This function looks for a DT node pointed to by a property named 'backlight'
- * and uses of_find_backlight_by_node() to get the backlight device.
- * Additionally if the brightness property is zero, it is set to
- * max_brightness.
- *
- * Returns:
- * NULL if there's no backlight property.
- * Error pointer -EPROBE_DEFER if the DT node is found, but no backlight device
- * is found.
- * If the backlight device is found, a pointer to the structure is returned.
- */
-struct backlight_device *tinydrm_of_find_backlight(struct device *dev)
-{
-	struct backlight_device *backlight;
-	struct device_node *np;
-
-	np = of_parse_phandle(dev->of_node, "backlight", 0);
-	if (!np)
-		return NULL;
-
-	backlight = of_find_backlight_by_node(np);
-	of_node_put(np);
-
-	if (!backlight)
-		return ERR_PTR(-EPROBE_DEFER);
-
-	if (!backlight->props.brightness) {
-		backlight->props.brightness = backlight->props.max_brightness;
-		DRM_DEBUG_KMS("Backlight brightness set to %d\n",
-			      backlight->props.brightness);
-	}
-
-	return backlight;
-}
-EXPORT_SYMBOL(tinydrm_of_find_backlight);
-
-/**
- * tinydrm_enable_backlight - Enable backlight helper
- * @backlight: Backlight device
- *
- * Returns:
- * Zero on success, negative error code on failure.
- */
-int tinydrm_enable_backlight(struct backlight_device *backlight)
-{
-	unsigned int old_state;
-	int ret;
-
-	if (!backlight)
-		return 0;
-
-	old_state = backlight->props.state;
-	backlight->props.state &= ~BL_CORE_FBBLANK;
-	DRM_DEBUG_KMS("Backlight state: 0x%x -> 0x%x\n", old_state,
-		      backlight->props.state);
-
-	ret = backlight_update_status(backlight);
-	if (ret)
-		DRM_ERROR("Failed to enable backlight %d\n", ret);
-
-	return ret;
-}
-EXPORT_SYMBOL(tinydrm_enable_backlight);
-
-/**
- * tinydrm_disable_backlight - Disable backlight helper
- * @backlight: Backlight device
- *
- * Returns:
- * Zero on success, negative error code on failure.
- */
-int tinydrm_disable_backlight(struct backlight_device *backlight)
-{
-	unsigned int old_state;
-	int ret;
-
-	if (!backlight)
-		return 0;
-
-	old_state = backlight->props.state;
-	backlight->props.state |= BL_CORE_FBBLANK;
-	DRM_DEBUG_KMS("Backlight state: 0x%x -> 0x%x\n", old_state,
-		      backlight->props.state);
-	ret = backlight_update_status(backlight);
-	if (ret)
-		DRM_ERROR("Failed to disable backlight %d\n", ret);
-
-	return ret;
-}
-EXPORT_SYMBOL(tinydrm_disable_backlight);
-
 #if IS_ENABLED(CONFIG_SPI)
 
 /**

drivers/gpu/drm/tinydrm/mi0283qt.c

@@ -9,6 +9,7 @@
  * (at your option) any later version.
  */
 
+#include <linux/backlight.h>
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
@@ -195,7 +196,7 @@ static int mi0283qt_probe(struct spi_device *spi)
 	if (IS_ERR(mipi->regulator))
 		return PTR_ERR(mipi->regulator);
 
-	mipi->backlight = tinydrm_of_find_backlight(dev);
+	mipi->backlight = devm_of_find_backlight(dev);
 	if (IS_ERR(mipi->backlight))
 		return PTR_ERR(mipi->backlight);
 

drivers/gpu/drm/tinydrm/mipi-dbi.c

@@ -286,7 +286,7 @@ void mipi_dbi_enable_flush(struct mipi_dbi *mipi)
 	if (fb)
 		fb->funcs->dirty(fb, NULL, 0, 0, NULL, 0);
 
-	tinydrm_enable_backlight(mipi->backlight);
+	backlight_enable(mipi->backlight);
 }
 EXPORT_SYMBOL(mipi_dbi_enable_flush);
 
@@ -325,7 +325,7 @@ void mipi_dbi_pipe_disable(struct drm_simple_display_pipe *pipe)
 	mipi->enabled = false;
 
 	if (mipi->backlight)
-		tinydrm_disable_backlight(mipi->backlight);
+		backlight_disable(mipi->backlight);
 	else
 		mipi_dbi_blank(mipi);
 

drivers/gpu/drm/tinydrm/st7735r.c

@@ -5,6 +5,7 @@
  * Copyright 2017 David Lechner <david@lechnology.com>
  */
 
+#include <linux/backlight.h>
 #include <linux/delay.h>
 #include <linux/dma-buf.h>
 #include <linux/gpio/consumer.h>
@@ -163,7 +164,7 @@ static int st7735r_probe(struct spi_device *spi)
 		return PTR_ERR(dc);
 	}
 
-	mipi->backlight = tinydrm_of_find_backlight(dev);
+	mipi->backlight = devm_of_find_backlight(dev);
 	if (IS_ERR(mipi->backlight))
 		return PTR_ERR(mipi->backlight);
 

drivers/video/backlight/backlight.c

@@ -580,6 +580,79 @@ struct backlight_device *of_find_backlight_by_node(struct device_node *node)
 EXPORT_SYMBOL(of_find_backlight_by_node);
 #endif
 
+/**
+ * of_find_backlight - Get backlight device
+ * @dev: Device
+ *
+ * This function looks for a property named 'backlight' on the DT node
+ * connected to @dev and looks up the backlight device.
+ *
+ * Call backlight_put() to drop the reference on the backlight device.
+ *
+ * Returns:
+ * A pointer to the backlight device if found.
+ * Error pointer -EPROBE_DEFER if the DT property is set, but no backlight
+ * device is found.
+ * NULL if there's no backlight property.
+ */
+struct backlight_device *of_find_backlight(struct device *dev)
+{
+	struct backlight_device *bd = NULL;
+	struct device_node *np;
+
+	if (!dev)
+		return NULL;
+
+	if (IS_ENABLED(CONFIG_OF) && dev->of_node) {
+		np = of_parse_phandle(dev->of_node, "backlight", 0);
+		if (np) {
+			bd = of_find_backlight_by_node(np);
+			of_node_put(np);
+			if (!bd)
+				return ERR_PTR(-EPROBE_DEFER);
+			/*
+			 * Note: gpio_backlight uses brightness as
+			 * power state during probe
+			 */
+			if (!bd->props.brightness)
+				bd->props.brightness = bd->props.max_brightness;
+		}
+	}
+
+	return bd;
+}
+EXPORT_SYMBOL(of_find_backlight);
+
+static void devm_backlight_release(void *data)
+{
+	backlight_put(data);
+}
+
+/**
+ * devm_of_find_backlight - Resource-managed of_find_backlight()
+ * @dev: Device
+ *
+ * Device managed version of of_find_backlight().
+ * The reference on the backlight device is automatically
+ * dropped on driver detach.
+ */
+struct backlight_device *devm_of_find_backlight(struct device *dev)
+{
+	struct backlight_device *bd;
+	int ret;
+
+	bd = of_find_backlight(dev);
+	if (IS_ERR_OR_NULL(bd))
+		return bd;
+	ret = devm_add_action(dev, devm_backlight_release, bd);
+	if (ret) {
+		backlight_put(bd);
+		return ERR_PTR(ret);
+	}
+	return bd;
+}
+EXPORT_SYMBOL(devm_of_find_backlight);
+
 static void __exit backlight_class_exit(void)
 {
 	class_destroy(backlight_class);

include/drm/bridge/dw_hdmi.h

@@ -143,12 +143,13 @@ struct dw_hdmi_plat_data {
 			     unsigned long mpixelclock);
 };
 
-int dw_hdmi_probe(struct platform_device *pdev,
-		  const struct dw_hdmi_plat_data *plat_data);
-void dw_hdmi_remove(struct platform_device *pdev);
-void dw_hdmi_unbind(struct device *dev);
-int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
-		 const struct dw_hdmi_plat_data *plat_data);
+struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
+			      const struct dw_hdmi_plat_data *plat_data);
+void dw_hdmi_remove(struct dw_hdmi *hdmi);
+void dw_hdmi_unbind(struct dw_hdmi *hdmi);
+struct dw_hdmi *dw_hdmi_bind(struct platform_device *pdev,
+			     struct drm_encoder *encoder,
+			     const struct dw_hdmi_plat_data *plat_data);
 
 void dw_hdmi_setup_rx_sense(struct device *dev, bool hpd, bool rx_sense);
 
@@ -157,7 +158,18 @@ void dw_hdmi_audio_enable(struct dw_hdmi *hdmi);
 void dw_hdmi_audio_disable(struct dw_hdmi *hdmi);
 
 /* PHY configuration */
+void dw_hdmi_phy_i2c_set_addr(struct dw_hdmi *hdmi, u8 address);
 void dw_hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
 			   unsigned char addr);
 
+void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable);
+void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable);
+void dw_hdmi_phy_reset(struct dw_hdmi *hdmi);
+
+enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
+					       void *data);
+void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
+			    bool force, bool disabled, bool rxsense);
+void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data);
+
 #endif /* __IMX_HDMI_H__ */

include/drm/drm_connector.h

@@ -342,7 +342,11 @@ int drm_display_info_set_bus_formats(struct drm_display_info *info,
 /**
  * struct drm_tv_connector_state - TV connector related states
  * @subconnector: selected subconnector
- * @margins: left/right/top/bottom margins
+ * @margins: margins
+ * @margins.left: left margin
+ * @margins.right: right margin
+ * @margins.top: top margin
+ * @margins.bottom: bottom margin
  * @mode: TV mode
  * @brightness: brightness in percent
  * @contrast: contrast in percent

include/drm/drm_dp_helper.h

@@ -329,6 +329,13 @@
 # define DP_DS_12BPC		            2
 # define DP_DS_16BPC		            3
 
+/* DP Forward error Correction Registers */
+#define DP_FEC_CAPABILITY		    0x090    /* 1.4 */
+# define DP_FEC_CAPABLE			    (1 << 0)
+# define DP_FEC_UNCORR_BLK_ERROR_COUNT_CAP  (1 << 1)
+# define DP_FEC_CORR_BLK_ERROR_COUNT_CAP    (1 << 2)
+# define DP_FEC_BIT_ERROR_COUNT_CAP	    (1 << 3)
+
 /* link configuration */
 #define	DP_LINK_BW_SET		            0x100
 # define DP_LINK_RATE_TABLE		    0x00    /* eDP 1.4 */
@@ -445,6 +452,19 @@
 #define DP_UPSTREAM_DEVICE_DP_PWR_NEED	    0x118   /* 1.2 */
 # define DP_PWR_NOT_NEEDED		    (1 << 0)
 
+#define DP_FEC_CONFIGURATION		    0x120    /* 1.4 */
+# define DP_FEC_READY			    (1 << 0)
+# define DP_FEC_ERR_COUNT_SEL_MASK	    (7 << 1)
+# define DP_FEC_ERR_COUNT_DIS		    (0 << 1)
+# define DP_FEC_UNCORR_BLK_ERROR_COUNT	    (1 << 1)
+# define DP_FEC_CORR_BLK_ERROR_COUNT	    (2 << 1)
+# define DP_FEC_BIT_ERROR_COUNT		    (3 << 1)
+# define DP_FEC_LANE_SELECT_MASK	    (3 << 4)
+# define DP_FEC_LANE_0_SELECT		    (0 << 4)
+# define DP_FEC_LANE_1_SELECT		    (1 << 4)
+# define DP_FEC_LANE_2_SELECT		    (2 << 4)
+# define DP_FEC_LANE_3_SELECT		    (3 << 4)
+
 #define DP_AUX_FRAME_SYNC_VALUE		    0x15c   /* eDP 1.4 */
 # define DP_AUX_FRAME_SYNC_VALID	    (1 << 0)
 
@@ -620,6 +640,16 @@
 #define DP_TEST_SINK			    0x270
 # define DP_TEST_SINK_START		    (1 << 0)
 
+#define DP_FEC_STATUS			    0x280    /* 1.4 */
+# define DP_FEC_DECODE_EN_DETECTED	    (1 << 0)
+# define DP_FEC_DECODE_DIS_DETECTED	    (1 << 1)
+
+#define DP_FEC_ERROR_COUNT_LSB		    0x0281    /* 1.4 */
+
+#define DP_FEC_ERROR_COUNT_MSB		    0x0282    /* 1.4 */
+# define DP_FEC_ERROR_COUNT_MASK	    0x7F
+# define DP_FEC_ERR_COUNT_VALID		    (1 << 7)
+
 #define DP_PAYLOAD_TABLE_UPDATE_STATUS      0x2c0   /* 1.2 MST */
 # define DP_PAYLOAD_TABLE_UPDATED           (1 << 0)
 # define DP_PAYLOAD_ACT_HANDLED             (1 << 1)

include/drm/drm_simple_kms_helper.h

@@ -21,6 +21,20 @@ struct drm_simple_display_pipe;
  *                                        display pipeline
  */
 struct drm_simple_display_pipe_funcs {
+	/**
+	 * @mode_valid:
+	 *
+	 * This function is called to filter out valid modes from the
+	 * suggestions suggested by the bridge or display. This optional
+	 * hook is passed in when initializing the pipeline.
+	 *
+	 * RETURNS:
+	 *
+	 * drm_mode_status Enum
+	 */
+	enum drm_mode_status (*mode_valid)(struct drm_crtc *crtc,
+					   const struct drm_display_mode *mode);
+
 	/**
 	 * @enable:
 	 *

include/drm/drm_vblank.h

@@ -55,8 +55,24 @@ struct drm_pending_vblank_event {
 	 * @event: Actual event which will be sent to userspace.
 	 */
 	union {
+		/**
+		 * @event.base: DRM event base class.
+		 */
 		struct drm_event base;
+
+		/**
+		 * @event.vbl:
+		 *
+		 * Event payload for vblank events, requested through
+		 * either the MODE_PAGE_FLIP or MODE_ATOMIC IOCTL. Also
+		 * generated by the legacy WAIT_VBLANK IOCTL, but new userspace
+		 * should use MODE_QUEUE_SEQUENCE and &event.seq instead.
+		 */
 		struct drm_event_vblank vbl;
+
+		/**
+		 * @event.seq: Event payload for the MODE_QUEUEU_SEQUENCE IOCTL.
+		 */
 		struct drm_event_crtc_sequence seq;
 	} event;
 };

include/drm/tinydrm/tinydrm-helpers.h

@@ -46,10 +46,6 @@ void tinydrm_xrgb8888_to_rgb565(u16 *dst, void *vaddr,
 void tinydrm_xrgb8888_to_gray8(u8 *dst, void *vaddr, struct drm_framebuffer *fb,
 			       struct drm_clip_rect *clip);
 
-struct backlight_device *tinydrm_of_find_backlight(struct device *dev);
-int tinydrm_enable_backlight(struct backlight_device *backlight);
-int tinydrm_disable_backlight(struct backlight_device *backlight);
-
 size_t tinydrm_spi_max_transfer_size(struct spi_device *spi, size_t max_len);
 bool tinydrm_spi_bpw_supported(struct spi_device *spi, u8 bpw);
 int tinydrm_spi_transfer(struct spi_device *spi, u32 speed_hz,

include/linux/backlight.h

@@ -130,6 +130,48 @@ static inline int backlight_update_status(struct backlight_device *bd)
 	return ret;
 }
 
+/**
+ * backlight_enable - Enable backlight
+ * @bd: the backlight device to enable
+ */
+static inline int backlight_enable(struct backlight_device *bd)
+{
+	if (!bd)
+		return 0;
+
+	bd->props.power = FB_BLANK_UNBLANK;
+	bd->props.fb_blank = FB_BLANK_UNBLANK;
+	bd->props.state &= ~BL_CORE_FBBLANK;
+
+	return backlight_update_status(bd);
+}
+
+/**
+ * backlight_disable - Disable backlight
+ * @bd: the backlight device to disable
+ */
+static inline int backlight_disable(struct backlight_device *bd)
+{
+	if (!bd)
+		return 0;
+
+	bd->props.power = FB_BLANK_POWERDOWN;
+	bd->props.fb_blank = FB_BLANK_POWERDOWN;
+	bd->props.state |= BL_CORE_FBBLANK;
+
+	return backlight_update_status(bd);
+}
+
+/**
+ * backlight_put - Drop backlight reference
+ * @bd: the backlight device to put
+ */
+static inline void backlight_put(struct backlight_device *bd)
+{
+	if (bd)
+		put_device(&bd->dev);
+}
+
 extern struct backlight_device *backlight_device_register(const char *name,
 	struct device *dev, void *devdata, const struct backlight_ops *ops,
 	const struct backlight_properties *props);
@@ -173,4 +215,20 @@ of_find_backlight_by_node(struct device_node *node)
 }
 #endif
 
+#if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE)
+struct backlight_device *of_find_backlight(struct device *dev);
+struct backlight_device *devm_of_find_backlight(struct device *dev);
+#else
+static inline struct backlight_device *of_find_backlight(struct device *dev)
+{
+	return NULL;
+}
+
+static inline struct backlight_device *
+devm_of_find_backlight(struct device *dev)
+{
+	return NULL;
+}
+#endif
+
 #endif