Merge branch 'drm-armada-devel' of git://ftp.arm.linux.org.uk/~rmk/linux-arm into drm-next

Merge armada changes, I've confirmed the componenet changes are same as in Greg's tree.
* 'drm-armada-devel' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  drm/armada: register crtc with port
  drm/armada: permit CRTCs to be registered as separate devices
  dt-bindings: add Marvell Dove LCD controller documentation
  drm/armada: update Armada 510 (Dove) to use "ext_ref_clk1" as the clock
  drm/armada: convert to componentized support
  drm: add of_graph endpoint helper to find possible CRTCs
  component: fix bug with legacy API
  drm/armada: make variant a CRTC thing
  drm/armada: move variant initialisation to CRTC init
  drm/armada: use number of CRTCs registered
  drm/armada: move IRQ handling into CRTC
  component: add support for component match array
  component: ignore multiple additions of the same component
  component: fix missed cleanup in case of devres failure

Documentation/devicetree/bindings/drm/armada/marvell,dove-lcd.txt

@@ -0,0 +1,30 @@
+Device Tree bindings for Armada DRM CRTC driver
+
+Required properties:
+ - compatible: value should be "marvell,dove-lcd".
+ - reg: base address and size of the LCD controller
+ - interrupts: single interrupt number for the LCD controller
+ - port: video output port with endpoints, as described by graph.txt
+
+Optional properties:
+
+ - clocks: as described by clock-bindings.txt
+ - clock-names: as described by clock-bindings.txt
+	"axiclk" - axi bus clock for pixel clock
+	"plldivider" - pll divider clock for pixel clock
+	"ext_ref_clk0" - external clock 0 for pixel clock
+	"ext_ref_clk1" - external clock 1 for pixel clock
+
+Note: all clocks are optional but at least one must be specified.
+Further clocks may be added in the future according to requirements of
+different SoCs.
+
+Example:
+
+	lcd0: lcd-controller@820000 {
+		compatible = "marvell,dove-lcd";
+		reg = <0x820000 0x1000>;
+		interrupts = <47>;
+		clocks = <&si5351 0>;
+		clock-names = "ext_ref_clk_1";
+	};

drivers/base/component.c

@@ -18,6 +18,15 @@
 #include <linux/mutex.h>
 #include <linux/slab.h>
 
+struct component_match {
+	size_t alloc;
+	size_t num;
+	struct {
+		void *data;
+		int (*fn)(struct device *, void *);
+	} compare[0];
+};
+
 struct master {
 	struct list_head node;
 	struct list_head components;
@@ -25,6 +34,7 @@ struct master {
 
 	const struct component_master_ops *ops;
 	struct device *dev;
+	struct component_match *match;
 };
 
 struct component {
@@ -69,6 +79,11 @@ static void component_detach_master(struct master *master, struct component *c)
 	c->master = NULL;
 }
 
+/*
+ * Add a component to a master, finding the component via the compare
+ * function and compare data.  This is safe to call for duplicate matches
+ * and will not result in the same component being added multiple times.
+ */
 int component_master_add_child(struct master *master,
 	int (*compare)(struct device *, void *), void *compare_data)
 {
@@ -76,11 +91,12 @@ int component_master_add_child(struct master *master,
 	int ret = -ENXIO;
 
 	list_for_each_entry(c, &component_list, node) {
-		if (c->master)
+		if (c->master && c->master != master)
 			continue;
 
 		if (compare(c->dev, compare_data)) {
-			component_attach_master(master, c);
+			if (!c->master)
+				component_attach_master(master, c);
 			ret = 0;
 			break;
 		}
@@ -90,6 +106,34 @@ int component_master_add_child(struct master *master,
 }
 EXPORT_SYMBOL_GPL(component_master_add_child);
 
+static int find_components(struct master *master)
+{
+	struct component_match *match = master->match;
+	size_t i;
+	int ret = 0;
+
+	if (!match) {
+		/*
+		 * Search the list of components, looking for components that
+		 * belong to this master, and attach them to the master.
+		 */
+		return master->ops->add_components(master->dev, master);
+	}
+
+	/*
+	 * Scan the array of match functions and attach
+	 * any components which are found to this master.
+	 */
+	for (i = 0; i < match->num; i++) {
+		ret = component_master_add_child(master,
+						 match->compare[i].fn,
+						 match->compare[i].data);
+		if (ret)
+			break;
+	}
+	return ret;
+}
+
 /* Detach all attached components from this master */
 static void master_remove_components(struct master *master)
 {
@@ -113,44 +157,44 @@ static void master_remove_components(struct master *master)
 static int try_to_bring_up_master(struct master *master,
 	struct component *component)
 {
-	int ret = 0;
+	int ret;
 
-	if (!master->bound) {
-		/*
-		 * Search the list of components, looking for components that
-		 * belong to this master, and attach them to the master.
-		 */
-		if (master->ops->add_components(master->dev, master)) {
-			/* Failed to find all components */
-			master_remove_components(master);
-			ret = 0;
-			goto out;
-		}
+	if (master->bound)
+		return 0;
 
-		if (component && component->master != master) {
-			master_remove_components(master);
-			ret = 0;
-			goto out;
-		}
+	/*
+	 * Search the list of components, looking for components that
+	 * belong to this master, and attach them to the master.
+	 */
+	if (find_components(master)) {
+		/* Failed to find all components */
+		ret = 0;
+		goto out;
+	}
 
-		if (!devres_open_group(master->dev, NULL, GFP_KERNEL)) {
-			ret = -ENOMEM;
-			goto out;
-		}
+	if (component && component->master != master) {
+		ret = 0;
+		goto out;
+	}
 
-		/* Found all components */
-		ret = master->ops->bind(master->dev);
-		if (ret < 0) {
-			devres_release_group(master->dev, NULL);
-			dev_info(master->dev, "master bind failed: %d\n", ret);
-			master_remove_components(master);
-			goto out;
-		}
+	if (!devres_open_group(master->dev, NULL, GFP_KERNEL)) {
+		ret = -ENOMEM;
+		goto out;
+	}
 
-		master->bound = true;
-		ret = 1;
+	/* Found all components */
+	ret = master->ops->bind(master->dev);
+	if (ret < 0) {
+		devres_release_group(master->dev, NULL);
+		dev_info(master->dev, "master bind failed: %d\n", ret);
+		goto out;
 	}
+
+	master->bound = true;
+	return 1;
+
 out:
+	master_remove_components(master);
 
 	return ret;
 }
@@ -180,18 +224,89 @@ static void take_down_master(struct master *master)
 	master_remove_components(master);
 }
 
-int component_master_add(struct device *dev,
-	const struct component_master_ops *ops)
+static size_t component_match_size(size_t num)
+{
+	return offsetof(struct component_match, compare[num]);
+}
+
+static struct component_match *component_match_realloc(struct device *dev,
+	struct component_match *match, size_t num)
+{
+	struct component_match *new;
+
+	if (match && match->alloc == num)
+		return match;
+
+	new = devm_kmalloc(dev, component_match_size(num), GFP_KERNEL);
+	if (!new)
+		return ERR_PTR(-ENOMEM);
+
+	if (match) {
+		memcpy(new, match, component_match_size(min(match->num, num)));
+		devm_kfree(dev, match);
+	} else {
+		new->num = 0;
+	}
+
+	new->alloc = num;
+
+	return new;
+}
+
+/*
+ * Add a component to be matched.
+ *
+ * The match array is first created or extended if necessary.
+ */
+void component_match_add(struct device *dev, struct component_match **matchptr,
+	int (*compare)(struct device *, void *), void *compare_data)
+{
+	struct component_match *match = *matchptr;
+
+	if (IS_ERR(match))
+		return;
+
+	if (!match || match->num == match->alloc) {
+		size_t new_size = match ? match->alloc + 16 : 15;
+
+		match = component_match_realloc(dev, match, new_size);
+
+		*matchptr = match;
+
+		if (IS_ERR(match))
+			return;
+	}
+
+	match->compare[match->num].fn = compare;
+	match->compare[match->num].data = compare_data;
+	match->num++;
+}
+EXPORT_SYMBOL(component_match_add);
+
+int component_master_add_with_match(struct device *dev,
+	const struct component_master_ops *ops,
+	struct component_match *match)
 {
 	struct master *master;
 	int ret;
 
+	if (ops->add_components && match)
+		return -EINVAL;
+
+	if (match) {
+		/* Reallocate the match array for its true size */
+		match = component_match_realloc(dev, match, match->num);
+		if (IS_ERR(match))
+			return PTR_ERR(match);
+	}
+
 	master = kzalloc(sizeof(*master), GFP_KERNEL);
 	if (!master)
 		return -ENOMEM;
 
 	master->dev = dev;
 	master->ops = ops;
+	master->match = match;
 	INIT_LIST_HEAD(&master->components);
 
 	/* Add to the list of available masters. */
@@ -209,6 +324,13 @@ int component_master_add(struct device *dev,
 
 	return ret < 0 ? ret : 0;
 }
+EXPORT_SYMBOL_GPL(component_master_add_with_match);
+
+int component_master_add(struct device *dev,
+	const struct component_master_ops *ops)
+{
+	return component_master_add_with_match(dev, ops, NULL);
+}
 EXPORT_SYMBOL_GPL(component_master_add);
 
 void component_master_del(struct device *dev,

drivers/gpu/drm/Makefile

@@ -20,6 +20,7 @@ drm-$(CONFIG_COMPAT) += drm_ioc32.o
 drm-$(CONFIG_DRM_GEM_CMA_HELPER) += drm_gem_cma_helper.o
 drm-$(CONFIG_PCI) += ati_pcigart.o
 drm-$(CONFIG_DRM_PANEL) += drm_panel.o
+drm-$(CONFIG_OF) += drm_of.o
 
 drm-usb-y   := drm_usb.o
 

drivers/gpu/drm/armada/armada_510.c

@@ -15,20 +15,19 @@
 #include "armada_drm.h"
 #include "armada_hw.h"
 
-static int armada510_init(struct armada_private *priv, struct device *dev)
+static int armada510_crtc_init(struct armada_crtc *dcrtc, struct device *dev)
 {
-	priv->extclk[0] = devm_clk_get(dev, "ext_ref_clk_1");
+	struct clk *clk;
 
-	if (IS_ERR(priv->extclk[0]) && PTR_ERR(priv->extclk[0]) == -ENOENT)
-		priv->extclk[0] = ERR_PTR(-EPROBE_DEFER);
+	clk = devm_clk_get(dev, "ext_ref_clk1");
+	if (IS_ERR(clk))
+		return PTR_ERR(clk) == -ENOENT ? -EPROBE_DEFER : PTR_ERR(clk);
 
-	return PTR_RET(priv->extclk[0]);
-}
+	dcrtc->extclk[0] = clk;
 
-static int armada510_crtc_init(struct armada_crtc *dcrtc)
-{
 	/* Lower the watermark so to eliminate jitter at higher bandwidths */
 	armada_updatel(0x20, (1 << 11) | 0xff, dcrtc->base + LCD_CFG_RDREG4F);
+
 	return 0;
 }
 
@@ -45,8 +44,7 @@ static int armada510_crtc_init(struct armada_crtc *dcrtc)
 static int armada510_crtc_compute_clock(struct armada_crtc *dcrtc,
 	const struct drm_display_mode *mode, uint32_t *sclk)
 {
-	struct armada_private *priv = dcrtc->crtc.dev->dev_private;
-	struct clk *clk = priv->extclk[0];
+	struct clk *clk = dcrtc->extclk[0];
 	int ret;
 
 	if (dcrtc->num == 1)
@@ -81,7 +79,6 @@ static int armada510_crtc_compute_clock(struct armada_crtc *dcrtc,
 const struct armada_variant armada510_ops = {
 	.has_spu_adv_reg = true,
 	.spu_adv_reg = ADV_HWC32ENABLE | ADV_HWC32ARGB | ADV_HWC32BLEND,
-	.init = armada510_init,
-	.crtc_init = armada510_crtc_init,
-	.crtc_compute_clock = armada510_crtc_compute_clock,
+	.init = armada510_crtc_init,
+	.compute_clock = armada510_crtc_compute_clock,
 };

drivers/gpu/drm/armada/armada_crtc.c

@@ -7,6 +7,9 @@
  * published by the Free Software Foundation.
  */
 #include <linux/clk.h>
+#include <linux/component.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
 #include <drm/drmP.h>
 #include <drm/drm_crtc_helper.h>
 #include "armada_crtc.h"
@@ -332,24 +335,23 @@ static void armada_drm_crtc_commit(struct drm_crtc *crtc)
 static bool armada_drm_crtc_mode_fixup(struct drm_crtc *crtc,
 	const struct drm_display_mode *mode, struct drm_display_mode *adj)
 {
-	struct armada_private *priv = crtc->dev->dev_private;
 	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 	int ret;
 
 	/* We can't do interlaced modes if we don't have the SPU_ADV_REG */
-	if (!priv->variant->has_spu_adv_reg &&
+	if (!dcrtc->variant->has_spu_adv_reg &&
 	    adj->flags & DRM_MODE_FLAG_INTERLACE)
 		return false;
 
 	/* Check whether the display mode is possible */
-	ret = priv->variant->crtc_compute_clock(dcrtc, adj, NULL);
+	ret = dcrtc->variant->compute_clock(dcrtc, adj, NULL);
 	if (ret)
 		return false;
 
 	return true;
 }
 
-void armada_drm_crtc_irq(struct armada_crtc *dcrtc, u32 stat)
+static void armada_drm_crtc_irq(struct armada_crtc *dcrtc, u32 stat)
 {
 	struct armada_vbl_event *e, *n;
 	void __iomem *base = dcrtc->base;
@@ -410,6 +412,27 @@ void armada_drm_crtc_irq(struct armada_crtc *dcrtc, u32 stat)
 	}
 }
 
+static irqreturn_t armada_drm_irq(int irq, void *arg)
+{
+	struct armada_crtc *dcrtc = arg;
+	u32 v, stat = readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR);
+
+	/*
+	 * This is rediculous - rather than writing bits to clear, we
+	 * have to set the actual status register value.  This is racy.
+	 */
+	writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR);
+
+	/* Mask out those interrupts we haven't enabled */
+	v = stat & dcrtc->irq_ena;
+
+	if (v & (VSYNC_IRQ|GRA_FRAME_IRQ|DUMB_FRAMEDONE)) {
+		armada_drm_crtc_irq(dcrtc, stat);
+		return IRQ_HANDLED;
+	}
+	return IRQ_NONE;
+}
+
 /* These are locked by dev->vbl_lock */
 void armada_drm_crtc_disable_irq(struct armada_crtc *dcrtc, u32 mask)
 {
@@ -470,7 +493,6 @@ static int armada_drm_crtc_mode_set(struct drm_crtc *crtc,
 	struct drm_display_mode *mode, struct drm_display_mode *adj,
 	int x, int y, struct drm_framebuffer *old_fb)
 {
-	struct armada_private *priv = crtc->dev->dev_private;
 	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 	struct armada_regs regs[17];
 	uint32_t lm, rm, tm, bm, val, sclk;
@@ -515,7 +537,7 @@ static int armada_drm_crtc_mode_set(struct drm_crtc *crtc,
 	}
 
 	/* Now compute the divider for real */
-	priv->variant->crtc_compute_clock(dcrtc, adj, &sclk);
+	dcrtc->variant->compute_clock(dcrtc, adj, &sclk);
 
 	/* Ensure graphic fifo is enabled */
 	armada_reg_queue_mod(regs, i, 0, CFG_PDWN64x66, LCD_SPU_SRAM_PARA1);
@@ -537,7 +559,7 @@ static int armada_drm_crtc_mode_set(struct drm_crtc *crtc,
 	dcrtc->v[1].spu_v_porch = tm << 16 | bm;
 	val = adj->crtc_hsync_start;
 	dcrtc->v[1].spu_adv_reg = val << 20 | val | ADV_VSYNCOFFEN |
-		priv->variant->spu_adv_reg;
+		dcrtc->variant->spu_adv_reg;
 
 	if (interlaced) {
 		/* Odd interlaced frame */
@@ -546,7 +568,7 @@ static int armada_drm_crtc_mode_set(struct drm_crtc *crtc,
 		dcrtc->v[0].spu_v_porch = dcrtc->v[1].spu_v_porch + 1;
 		val = adj->crtc_hsync_start - adj->crtc_htotal / 2;
 		dcrtc->v[0].spu_adv_reg = val << 20 | val | ADV_VSYNCOFFEN |
-			priv->variant->spu_adv_reg;
+			dcrtc->variant->spu_adv_reg;
 	} else {
 		dcrtc->v[0] = dcrtc->v[1];
 	}
@@ -561,7 +583,7 @@ static int armada_drm_crtc_mode_set(struct drm_crtc *crtc,
 	armada_reg_queue_set(regs, i, dcrtc->v[0].spu_v_h_total,
 			   LCD_SPUT_V_H_TOTAL);
 
-	if (priv->variant->has_spu_adv_reg) {
+	if (dcrtc->variant->has_spu_adv_reg) {
 		armada_reg_queue_mod(regs, i, dcrtc->v[0].spu_adv_reg,
 				     ADV_VSYNC_L_OFF | ADV_VSYNC_H_OFF |
 				     ADV_VSYNCOFFEN, LCD_SPU_ADV_REG);
@@ -805,12 +827,11 @@ static int armada_drm_crtc_cursor_set(struct drm_crtc *crtc,
 {
 	struct drm_device *dev = crtc->dev;
 	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
-	struct armada_private *priv = crtc->dev->dev_private;
 	struct armada_gem_object *obj = NULL;
 	int ret;
 
 	/* If no cursor support, replicate drm's return value */
-	if (!priv->variant->has_spu_adv_reg)
+	if (!dcrtc->variant->has_spu_adv_reg)
 		return -ENXIO;
 
 	if (handle && w > 0 && h > 0) {
@@ -858,11 +879,10 @@ static int armada_drm_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
 {
 	struct drm_device *dev = crtc->dev;
 	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
-	struct armada_private *priv = crtc->dev->dev_private;
 	int ret;
 
 	/* If no cursor support, replicate drm's return value */
-	if (!priv->variant->has_spu_adv_reg)
+	if (!dcrtc->variant->has_spu_adv_reg)
 		return -EFAULT;
 
 	mutex_lock(&dev->struct_mutex);
@@ -888,6 +908,10 @@ static void armada_drm_crtc_destroy(struct drm_crtc *crtc)
 	if (!IS_ERR(dcrtc->clk))
 		clk_disable_unprepare(dcrtc->clk);
 
+	writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ENA);
+
+	of_node_put(dcrtc->crtc.port);
+
 	kfree(dcrtc);
 }
 
@@ -1027,19 +1051,20 @@ static int armada_drm_crtc_create_properties(struct drm_device *dev)
 	return 0;
 }
 
-int armada_drm_crtc_create(struct drm_device *dev, unsigned num,
-	struct resource *res)
+int armada_drm_crtc_create(struct drm_device *drm, struct device *dev,
+	struct resource *res, int irq, const struct armada_variant *variant,
+	struct device_node *port)
 {
-	struct armada_private *priv = dev->dev_private;
+	struct armada_private *priv = drm->dev_private;
 	struct armada_crtc *dcrtc;
 	void __iomem *base;
 	int ret;
 
-	ret = armada_drm_crtc_create_properties(dev);
+	ret = armada_drm_crtc_create_properties(drm);
 	if (ret)
 		return ret;
 
-	base = devm_request_and_ioremap(dev->dev, res);
+	base = devm_request_and_ioremap(dev, res);
 	if (!base) {
 		DRM_ERROR("failed to ioremap register\n");
 		return -ENOMEM;
@@ -1051,8 +1076,12 @@ int armada_drm_crtc_create(struct drm_device *dev, unsigned num,
 		return -ENOMEM;
 	}
 
+	if (dev != drm->dev)
+		dev_set_drvdata(dev, dcrtc);
+
+	dcrtc->variant = variant;
 	dcrtc->base = base;
-	dcrtc->num = num;
+	dcrtc->num = drm->mode_config.num_crtc;
 	dcrtc->clk = ERR_PTR(-EINVAL);
 	dcrtc->csc_yuv_mode = CSC_AUTO;
 	dcrtc->csc_rgb_mode = CSC_AUTO;
@@ -1074,9 +1103,18 @@ int armada_drm_crtc_create(struct drm_device *dev, unsigned num,
 		       CFG_PDWN64x66, dcrtc->base + LCD_SPU_SRAM_PARA1);
 	writel_relaxed(0x2032ff81, dcrtc->base + LCD_SPU_DMA_CTRL1);
 	writel_relaxed(0x00000000, dcrtc->base + LCD_SPU_GRA_OVSA_HPXL_VLN);
+	writel_relaxed(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
+	writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR);
+
+	ret = devm_request_irq(dev, irq, armada_drm_irq, 0, "armada_drm_crtc",
+			       dcrtc);
+	if (ret < 0) {
+		kfree(dcrtc);
+		return ret;
+	}
 
-	if (priv->variant->crtc_init) {
-		ret = priv->variant->crtc_init(dcrtc);
+	if (dcrtc->variant->init) {
+		ret = dcrtc->variant->init(dcrtc, dev);
 		if (ret) {
 			kfree(dcrtc);
 			return ret;
@@ -1088,7 +1126,8 @@ int armada_drm_crtc_create(struct drm_device *dev, unsigned num,
 
 	priv->dcrtc[dcrtc->num] = dcrtc;
 
-	drm_crtc_init(dev, &dcrtc->crtc, &armada_crtc_funcs);
+	dcrtc->crtc.port = port;
+	drm_crtc_init(drm, &dcrtc->crtc, &armada_crtc_funcs);
 	drm_crtc_helper_add(&dcrtc->crtc, &armada_crtc_helper_funcs);
 
 	drm_object_attach_property(&dcrtc->crtc.base, priv->csc_yuv_prop,
@@ -1096,5 +1135,107 @@ int armada_drm_crtc_create(struct drm_device *dev, unsigned num,
 	drm_object_attach_property(&dcrtc->crtc.base, priv->csc_rgb_prop,
 				   dcrtc->csc_rgb_mode);
 
-	return armada_overlay_plane_create(dev, 1 << dcrtc->num);
+	return armada_overlay_plane_create(drm, 1 << dcrtc->num);
+}
+
+static int
+armada_lcd_bind(struct device *dev, struct device *master, void *data)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct drm_device *drm = data;
+	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	int irq = platform_get_irq(pdev, 0);
+	const struct armada_variant *variant;
+	struct device_node *port = NULL;
+
+	if (irq < 0)
+		return irq;
+
+	if (!dev->of_node) {
+		const struct platform_device_id *id;
+
+		id = platform_get_device_id(pdev);
+		if (!id)
+			return -ENXIO;
+
+		variant = (const struct armada_variant *)id->driver_data;
+	} else {
+		const struct of_device_id *match;
+		struct device_node *np, *parent = dev->of_node;
+
+		match = of_match_device(dev->driver->of_match_table, dev);
+		if (!match)
+			return -ENXIO;
+
+		np = of_get_child_by_name(parent, "ports");
+		if (np)
+			parent = np;
+		port = of_get_child_by_name(parent, "port");
+		of_node_put(np);
+		if (!port) {
+			dev_err(dev, "no port node found in %s\n",
+				parent->full_name);
+			return -ENXIO;
+		}
+
+		variant = match->data;
+	}
+
+	return armada_drm_crtc_create(drm, dev, res, irq, variant, port);
+}
+
+static void
+armada_lcd_unbind(struct device *dev, struct device *master, void *data)
+{
+	struct armada_crtc *dcrtc = dev_get_drvdata(dev);
+
+	armada_drm_crtc_destroy(&dcrtc->crtc);
 }
+
+static const struct component_ops armada_lcd_ops = {
+	.bind = armada_lcd_bind,
+	.unbind = armada_lcd_unbind,
+};
+
+static int armada_lcd_probe(struct platform_device *pdev)
+{
+	return component_add(&pdev->dev, &armada_lcd_ops);
+}
+
+static int armada_lcd_remove(struct platform_device *pdev)
+{
+	component_del(&pdev->dev, &armada_lcd_ops);
+	return 0;
+}
+
+static struct of_device_id armada_lcd_of_match[] = {
+	{
+		.compatible	= "marvell,dove-lcd",
+		.data		= &armada510_ops,
+	},
+	{}
+};
+MODULE_DEVICE_TABLE(of, armada_lcd_of_match);
+
+static const struct platform_device_id armada_lcd_platform_ids[] = {
+	{
+		.name		= "armada-lcd",
+		.driver_data	= (unsigned long)&armada510_ops,
+	}, {
+		.name		= "armada-510-lcd",
+		.driver_data	= (unsigned long)&armada510_ops,
+	},
+	{ },
+};
+MODULE_DEVICE_TABLE(platform, armada_lcd_platform_ids);
+
+struct platform_driver armada_lcd_platform_driver = {
+	.probe	= armada_lcd_probe,
+	.remove	= armada_lcd_remove,
+	.driver = {
+		.name	= "armada-lcd",
+		.owner	=  THIS_MODULE,
+		.of_match_table = armada_lcd_of_match,
+	},
+	.id_table = armada_lcd_platform_ids,
+};

drivers/gpu/drm/armada/armada_crtc.h

@@ -32,12 +32,15 @@ struct armada_regs {
 	armada_reg_queue_mod(_r, _i, 0, 0, ~0)
 
 struct armada_frame_work;
+struct armada_variant;
 
 struct armada_crtc {
 	struct drm_crtc		crtc;
+	const struct armada_variant *variant;
 	unsigned		num;
 	void __iomem		*base;
 	struct clk		*clk;
+	struct clk		*extclk[2];
 	struct {
 		uint32_t	spu_v_h_total;
 		uint32_t	spu_v_porch;
@@ -72,12 +75,16 @@ struct armada_crtc {
 };
 #define drm_to_armada_crtc(c) container_of(c, struct armada_crtc, crtc)
 
-int armada_drm_crtc_create(struct drm_device *, unsigned, struct resource *);
+struct device_node;
+int armada_drm_crtc_create(struct drm_device *, struct device *,
+	struct resource *, int, const struct armada_variant *,
+	struct device_node *);
 void armada_drm_crtc_gamma_set(struct drm_crtc *, u16, u16, u16, int);
 void armada_drm_crtc_gamma_get(struct drm_crtc *, u16 *, u16 *, u16 *, int);
-void armada_drm_crtc_irq(struct armada_crtc *, u32);
 void armada_drm_crtc_disable_irq(struct armada_crtc *, u32);
 void armada_drm_crtc_enable_irq(struct armada_crtc *, u32);
 void armada_drm_crtc_update_regs(struct armada_crtc *, struct armada_regs *);
 
+extern struct platform_driver armada_lcd_platform_driver;
+
 #endif

drivers/gpu/drm/armada/armada_drm.h

@@ -59,26 +59,23 @@ void armada_drm_vbl_event_remove_unlocked(struct armada_crtc *,
 struct armada_private;
 
 struct armada_variant {
-	bool	has_spu_adv_reg;
+	bool has_spu_adv_reg;
 	uint32_t spu_adv_reg;
-	int (*init)(struct armada_private *, struct device *);
-	int (*crtc_init)(struct armada_crtc *);
-	int (*crtc_compute_clock)(struct armada_crtc *,
-				  const struct drm_display_mode *,
-				  uint32_t *);
+	int (*init)(struct armada_crtc *, struct device *);
+	int (*compute_clock)(struct armada_crtc *,
+			     const struct drm_display_mode *,
+			     uint32_t *);
 };
 
 /* Variant ops */
 extern const struct armada_variant armada510_ops;
 
 struct armada_private {
-	const struct armada_variant *variant;
 	struct work_struct	fb_unref_work;
 	DECLARE_KFIFO(fb_unref, struct drm_framebuffer *, 8);
 	struct drm_fb_helper	*fbdev;
 	struct armada_crtc	*dcrtc[2];
 	struct drm_mm		linear;
-	struct clk		*extclk[2];
 	struct drm_property	*csc_yuv_prop;
 	struct drm_property	*csc_rgb_prop;
 	struct drm_property	*colorkey_prop;

drivers/gpu/drm/armada/armada_drv.c

@@ -6,7 +6,9 @@
  * published by the Free Software Foundation.
  */
 #include <linux/clk.h>
+#include <linux/component.h>
 #include <linux/module.h>
+#include <linux/of_graph.h>
 #include <drm/drmP.h>
 #include <drm/drm_crtc_helper.h>
 #include "armada_crtc.h"
@@ -52,6 +54,11 @@ static const struct armada_drm_slave_config tda19988_config = {
 };
 #endif
 
+static bool is_componentized(struct device *dev)
+{
+	return dev->of_node || dev->platform_data;
+}
+
 static void armada_drm_unref_work(struct work_struct *work)
 {
 	struct armada_private *priv =
@@ -85,6 +92,7 @@ void armada_drm_queue_unref_work(struct drm_device *dev,
 static int armada_drm_load(struct drm_device *dev, unsigned long flags)
 {
 	const struct platform_device_id *id;
+	const struct armada_variant *variant;
 	struct armada_private *priv;
 	struct resource *res[ARRAY_SIZE(priv->dcrtc)];
 	struct resource *mem = NULL;
@@ -107,7 +115,7 @@ static int armada_drm_load(struct drm_device *dev, unsigned long flags)
 			return -EINVAL;
 	}
 
-	if (!res[0] || !mem)
+	if (!mem)
 		return -ENXIO;
 
 	if (!devm_request_mem_region(dev->dev, mem->start,
@@ -128,11 +136,7 @@ static int armada_drm_load(struct drm_device *dev, unsigned long flags)
 	if (!id)
 		return -ENXIO;
 
-	priv->variant = (struct armada_variant *)id->driver_data;
-
-	ret = priv->variant->init(priv, dev->dev);
-	if (ret)
-		return ret;
+	variant = (const struct armada_variant *)id->driver_data;
 
 	INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
 	INIT_KFIFO(priv->fb_unref);
@@ -155,40 +159,50 @@ static int armada_drm_load(struct drm_device *dev, unsigned long flags)
 
 	/* Create all LCD controllers */
 	for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) {
+		int irq;
+
 		if (!res[n])
 			break;
 
-		ret = armada_drm_crtc_create(dev, n, res[n]);
+		irq = platform_get_irq(dev->platformdev, n);
+		if (irq < 0)
+			goto err_kms;
+
+		ret = armada_drm_crtc_create(dev, dev->dev, res[n], irq,
+					     variant, NULL);
 		if (ret)
 			goto err_kms;
 	}
 
+	if (is_componentized(dev->dev)) {
+		ret = component_bind_all(dev->dev, dev);
+		if (ret)
+			goto err_kms;
+	} else {
 #ifdef CONFIG_DRM_ARMADA_TDA1998X
-	ret = armada_drm_connector_slave_create(dev, &tda19988_config);
-	if (ret)
-		goto err_kms;
+		ret = armada_drm_connector_slave_create(dev, &tda19988_config);
+		if (ret)
+			goto err_kms;
 #endif
+	}
 
-	ret = drm_vblank_init(dev, n);
-	if (ret)
-		goto err_kms;
-
-	ret = drm_irq_install(dev, platform_get_irq(dev->platformdev, 0));
+	ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
 	if (ret)
-		goto err_kms;
+		goto err_comp;
 
 	dev->vblank_disable_allowed = 1;
 
 	ret = armada_fbdev_init(dev);
 	if (ret)
-		goto err_irq;
+		goto err_comp;
 
 	drm_kms_helper_poll_init(dev);
 
 	return 0;
 
- err_irq:
-	drm_irq_uninstall(dev);
+ err_comp:
+	if (is_componentized(dev->dev))
+		component_unbind_all(dev->dev, dev);
  err_kms:
 	drm_mode_config_cleanup(dev);
 	drm_mm_takedown(&priv->linear);
@@ -203,7 +217,10 @@ static int armada_drm_unload(struct drm_device *dev)
 
 	drm_kms_helper_poll_fini(dev);
 	armada_fbdev_fini(dev);
-	drm_irq_uninstall(dev);
+
+	if (is_componentized(dev->dev))
+		component_unbind_all(dev->dev, dev);
+
 	drm_mode_config_cleanup(dev);
 	drm_mm_takedown(&priv->linear);
 	flush_work(&priv->fb_unref_work);
@@ -259,52 +276,6 @@ static void armada_drm_disable_vblank(struct drm_device *dev, int crtc)
 	armada_drm_crtc_disable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
 }
 
-static irqreturn_t armada_drm_irq_handler(int irq, void *arg)
-{
-	struct drm_device *dev = arg;
-	struct armada_private *priv = dev->dev_private;
-	struct armada_crtc *dcrtc = priv->dcrtc[0];
-	uint32_t v, stat = readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR);
-	irqreturn_t handled = IRQ_NONE;
-
-	/*
-	 * This is rediculous - rather than writing bits to clear, we
-	 * have to set the actual status register value.  This is racy.
-	 */
-	writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR);
-
-	/* Mask out those interrupts we haven't enabled */
-	v = stat & dcrtc->irq_ena;
-
-	if (v & (VSYNC_IRQ|GRA_FRAME_IRQ|DUMB_FRAMEDONE)) {
-		armada_drm_crtc_irq(dcrtc, stat);
-		handled = IRQ_HANDLED;
-	}
-
-	return handled;
-}
-
-static int armada_drm_irq_postinstall(struct drm_device *dev)
-{
-	struct armada_private *priv = dev->dev_private;
-	struct armada_crtc *dcrtc = priv->dcrtc[0];
-
-	spin_lock_irq(&dev->vbl_lock);
-	writel_relaxed(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
-	writel(0, dcrtc->base + LCD_SPU_IRQ_ISR);
-	spin_unlock_irq(&dev->vbl_lock);
-
-	return 0;
-}
-
-static void armada_drm_irq_uninstall(struct drm_device *dev)
-{
-	struct armada_private *priv = dev->dev_private;
-	struct armada_crtc *dcrtc = priv->dcrtc[0];
-
-	writel(0, dcrtc->base + LCD_SPU_IRQ_ENA);
-}
-
 static struct drm_ioctl_desc armada_ioctls[] = {
 	DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,
 		DRM_UNLOCKED),
@@ -340,9 +311,6 @@ static struct drm_driver armada_drm_driver = {
 	.get_vblank_counter	= drm_vblank_count,
 	.enable_vblank		= armada_drm_enable_vblank,
 	.disable_vblank		= armada_drm_disable_vblank,
-	.irq_handler		= armada_drm_irq_handler,
-	.irq_postinstall	= armada_drm_irq_postinstall,
-	.irq_uninstall		= armada_drm_irq_uninstall,
 #ifdef CONFIG_DEBUG_FS
 	.debugfs_init		= armada_drm_debugfs_init,
 	.debugfs_cleanup	= armada_drm_debugfs_cleanup,
@@ -362,19 +330,140 @@ static struct drm_driver armada_drm_driver = {
 	.desc			= "Armada SoC DRM",
 	.date			= "20120730",
 	.driver_features	= DRIVER_GEM | DRIVER_MODESET |
-				  DRIVER_HAVE_IRQ | DRIVER_PRIME,
+				  DRIVER_PRIME,
 	.ioctls			= armada_ioctls,
 	.fops			= &armada_drm_fops,
 };
 
+static int armada_drm_bind(struct device *dev)
+{
+	return drm_platform_init(&armada_drm_driver, to_platform_device(dev));
+}
+
+static void armada_drm_unbind(struct device *dev)
+{
+	drm_put_dev(dev_get_drvdata(dev));
+}
+
+static int compare_of(struct device *dev, void *data)
+{
+	return dev->of_node == data;
+}
+
+static int compare_dev_name(struct device *dev, void *data)
+{
+	const char *name = data;
+	return !strcmp(dev_name(dev), name);
+}
+
+static void armada_add_endpoints(struct device *dev,
+	struct component_match **match, struct device_node *port)
+{
+	struct device_node *ep, *remote;
+
+	for_each_child_of_node(port, ep) {
+		remote = of_graph_get_remote_port_parent(ep);
+		if (!remote || !of_device_is_available(remote)) {
+			of_node_put(remote);
+			continue;
+		} else if (!of_device_is_available(remote->parent)) {
+			dev_warn(dev, "parent device of %s is not available\n",
+				 remote->full_name);
+			of_node_put(remote);
+			continue;
+		}
+
+		component_match_add(dev, match, compare_of, remote);
+		of_node_put(remote);
+	}
+}
+
+static int armada_drm_find_components(struct device *dev,
+	struct component_match **match)
+{
+	struct device_node *port;
+	int i;
+
+	if (dev->of_node) {
+		struct device_node *np = dev->of_node;
+
+		for (i = 0; ; i++) {
+			port = of_parse_phandle(np, "ports", i);
+			if (!port)
+				break;
+
+			component_match_add(dev, match, compare_of, port);
+			of_node_put(port);
+		}
+
+		if (i == 0) {
+			dev_err(dev, "missing 'ports' property\n");
+			return -ENODEV;
+		}
+
+		for (i = 0; ; i++) {
+			port = of_parse_phandle(np, "ports", i);
+			if (!port)
+				break;
+
+			armada_add_endpoints(dev, match, port);
+			of_node_put(port);
+		}
+	} else if (dev->platform_data) {
+		char **devices = dev->platform_data;
+		struct device *d;
+
+		for (i = 0; devices[i]; i++)
+			component_match_add(dev, match, compare_dev_name,
+					    devices[i]);
+
+		if (i == 0) {
+			dev_err(dev, "missing 'ports' property\n");
+			return -ENODEV;
+		}
+
+		for (i = 0; devices[i]; i++) {
+			d = bus_find_device_by_name(&platform_bus_type, NULL,
+					devices[i]);
+			if (d && d->of_node) {
+				for_each_child_of_node(d->of_node, port)
+					armada_add_endpoints(dev, match, port);
+			}
+			put_device(d);
+		}
+	}
+
+	return 0;
+}
+
+static const struct component_master_ops armada_master_ops = {
+	.bind = armada_drm_bind,
+	.unbind = armada_drm_unbind,
+};
+
 static int armada_drm_probe(struct platform_device *pdev)
 {
-	return drm_platform_init(&armada_drm_driver, pdev);
+	if (is_componentized(&pdev->dev)) {
+		struct component_match *match = NULL;
+		int ret;
+
+		ret = armada_drm_find_components(&pdev->dev, &match);
+		if (ret < 0)
+			return ret;
+
+		return component_master_add_with_match(&pdev->dev,
+				&armada_master_ops, match);
+	} else {
+		return drm_platform_init(&armada_drm_driver, pdev);
+	}
 }
 
 static int armada_drm_remove(struct platform_device *pdev)
 {
-	drm_put_dev(platform_get_drvdata(pdev));
+	if (is_componentized(&pdev->dev))
+		component_master_del(&pdev->dev, &armada_master_ops);
+	else
+		drm_put_dev(platform_get_drvdata(pdev));
 	return 0;
 }
 
@@ -402,14 +491,24 @@ static struct platform_driver armada_drm_platform_driver = {
 
 static int __init armada_drm_init(void)
 {
+	int ret;
+
 	armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
-	return platform_driver_register(&armada_drm_platform_driver);
+
+	ret = platform_driver_register(&armada_lcd_platform_driver);
+	if (ret)
+		return ret;
+	ret = platform_driver_register(&armada_drm_platform_driver);
+	if (ret)
+		platform_driver_unregister(&armada_lcd_platform_driver);
+	return ret;
 }
 module_init(armada_drm_init);
 
 static void __exit armada_drm_exit(void)
 {
 	platform_driver_unregister(&armada_drm_platform_driver);
+	platform_driver_unregister(&armada_lcd_platform_driver);
 }
 module_exit(armada_drm_exit);
 

drivers/gpu/drm/drm_of.c

@@ -0,0 +1,67 @@
+#include <linux/export.h>
+#include <linux/list.h>
+#include <linux/of_graph.h>
+#include <drm/drmP.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_of.h>
+
+/**
+ * drm_crtc_port_mask - find the mask of a registered CRTC by port OF node
+ * @dev: DRM device
+ * @port: port OF node
+ *
+ * Given a port OF node, return the possible mask of the corresponding
+ * CRTC within a device's list of CRTCs.  Returns zero if not found.
+ */
+static uint32_t drm_crtc_port_mask(struct drm_device *dev,
+				   struct device_node *port)
+{
+	unsigned int index = 0;
+	struct drm_crtc *tmp;
+
+	list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) {
+		if (tmp->port == port)
+			return 1 << index;
+
+		index++;
+	}
+
+	return 0;
+}
+
+/**
+ * drm_of_find_possible_crtcs - find the possible CRTCs for an encoder port
+ * @dev: DRM device
+ * @port: encoder port to scan for endpoints
+ *
+ * Scan all endpoints attached to a port, locate their attached CRTCs,
+ * and generate the DRM mask of CRTCs which may be attached to this
+ * encoder.
+ *
+ * See Documentation/devicetree/bindings/graph.txt for the bindings.
+ */
+uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,
+				    struct device_node *port)
+{
+	struct device_node *remote_port, *ep = NULL;
+	uint32_t possible_crtcs = 0;
+
+	do {
+		ep = of_graph_get_next_endpoint(port, ep);
+		if (!ep)
+			break;
+
+		remote_port = of_graph_get_remote_port(ep);
+		if (!remote_port) {
+			of_node_put(ep);
+			return 0;
+		}
+
+		possible_crtcs |= drm_crtc_port_mask(dev, remote_port);
+
+		of_node_put(remote_port);
+	} while (1);
+
+	return possible_crtcs;
+}
+EXPORT_SYMBOL(drm_of_find_possible_crtcs);

include/drm/drm_crtc.h

@@ -41,6 +41,7 @@ struct drm_framebuffer;
 struct drm_object_properties;
 struct drm_file;
 struct drm_clip_rect;
+struct device_node;
 
 #define DRM_MODE_OBJECT_CRTC 0xcccccccc
 #define DRM_MODE_OBJECT_CONNECTOR 0xc0c0c0c0
@@ -314,6 +315,7 @@ struct drm_crtc_funcs {
  */
 struct drm_crtc {
 	struct drm_device *dev;
+	struct device_node *port;
 	struct list_head head;
 
 	/**

include/drm/drm_of.h

@@ -0,0 +1,18 @@
+#ifndef __DRM_OF_H__
+#define __DRM_OF_H__
+
+struct drm_device;
+struct device_node;
+
+#ifdef CONFIG_OF
+extern uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,
+					   struct device_node *port);
+#else
+static inline uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,
+						  struct device_node *port)
+{
+	return 0;
+}
+#endif
+
+#endif /* __DRM_OF_H__ */

include/linux/component.h

@@ -29,4 +29,11 @@ void component_master_del(struct device *,
 int component_master_add_child(struct master *master,
 	int (*compare)(struct device *, void *), void *compare_data);
 
+struct component_match;
+
+int component_master_add_with_match(struct device *,
+	const struct component_master_ops *, struct component_match *);
+void component_match_add(struct device *, struct component_match **,
+	int (*compare)(struct device *, void *), void *compare_data);
+
 #endif