[PATCH v7 1/8] drm: sun8i: Add a basic DRM driver for Allwinner DE2

* [PATCH v7 1/8] drm: sun8i: Add a basic DRM driver for Allwinner DE2
  2016-11-29 10:18 ` Jean-Francois Moine
@ 2016-11-28 14:23     ` Jean-Francois Moine
  -1 siblings, 0 replies; 79+ messages in thread
From: Jean-Francois Moine @ 2016-11-28 14:23 UTC (permalink / raw)
  To: Dave Airlie, Maxime Ripard, Rob Herring
  Cc: devicetree-u79uwXL29TY76Z2rM5mHXA,
	dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
	linux-sunxi-/JYPxA39Uh5TLH3MbocFFw

Allwinner's recent SoCs, as A64, A83T and H3, contain a new display
engine, DE2.
This patch adds a DRM video driver for this device.

Signed-off-by: Jean-Francois Moine <moinejf-GANU6spQydw@public.gmane.org>
---
 drivers/gpu/drm/Kconfig           |   2 +
 drivers/gpu/drm/Makefile          |   1 +
 drivers/gpu/drm/sun8i/Kconfig     |  19 +
 drivers/gpu/drm/sun8i/Makefile    |   7 +
 drivers/gpu/drm/sun8i/de2_crtc.c  | 449 +++++++++++++++++++++++
 drivers/gpu/drm/sun8i/de2_crtc.h  |  50 +++
 drivers/gpu/drm/sun8i/de2_drv.c   | 317 ++++++++++++++++
 drivers/gpu/drm/sun8i/de2_drv.h   |  48 +++
 drivers/gpu/drm/sun8i/de2_plane.c | 734 ++++++++++++++++++++++++++++++++++++++
 9 files changed, 1627 insertions(+)
 create mode 100644 drivers/gpu/drm/sun8i/Kconfig
 create mode 100644 drivers/gpu/drm/sun8i/Makefile
 create mode 100644 drivers/gpu/drm/sun8i/de2_crtc.c
 create mode 100644 drivers/gpu/drm/sun8i/de2_crtc.h
 create mode 100644 drivers/gpu/drm/sun8i/de2_drv.c
 create mode 100644 drivers/gpu/drm/sun8i/de2_drv.h
 create mode 100644 drivers/gpu/drm/sun8i/de2_plane.c

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 95fc041..bb1bfbc 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -202,6 +202,8 @@ source "drivers/gpu/drm/shmobile/Kconfig"
 
 source "drivers/gpu/drm/sun4i/Kconfig"
 
+source "drivers/gpu/drm/sun8i/Kconfig"
+
 source "drivers/gpu/drm/omapdrm/Kconfig"
 
 source "drivers/gpu/drm/tilcdc/Kconfig"
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 883f3e7..3e1eaa0 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -72,6 +72,7 @@ obj-$(CONFIG_DRM_RCAR_DU) += rcar-du/
 obj-$(CONFIG_DRM_SHMOBILE) +=shmobile/
 obj-y			+= omapdrm/
 obj-$(CONFIG_DRM_SUN4I) += sun4i/
+obj-$(CONFIG_DRM_SUN8I) += sun8i/
 obj-y			+= tilcdc/
 obj-$(CONFIG_DRM_QXL) += qxl/
 obj-$(CONFIG_DRM_BOCHS) += bochs/
diff --git a/drivers/gpu/drm/sun8i/Kconfig b/drivers/gpu/drm/sun8i/Kconfig
new file mode 100644
index 0000000..6940895
--- /dev/null
+++ b/drivers/gpu/drm/sun8i/Kconfig
@@ -0,0 +1,19 @@
+#
+# Allwinner DE2 Video configuration
+#
+
+config DRM_SUN8I
+	bool
+
+config DRM_SUN8I_DE2
+	tristate "Support for Allwinner Video with DE2 interface"
+	depends on DRM && OF
+	depends on ARCH_SUNXI || COMPILE_TEST
+	select DRM_GEM_CMA_HELPER
+	select DRM_KMS_CMA_HELPER
+	select DRM_KMS_HELPER
+	select DRM_SUN8I
+	help
+	  Choose this option if your Allwinner chipset has the DE2 interface
+	  as the A64, A83T and H3. If M is selected the module will be called
+	  sun8i-de2-drm.
diff --git a/drivers/gpu/drm/sun8i/Makefile b/drivers/gpu/drm/sun8i/Makefile
new file mode 100644
index 0000000..f107919
--- /dev/null
+++ b/drivers/gpu/drm/sun8i/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for Allwinner's sun8i DRM device driver
+#
+
+sun8i-de2-drm-objs := de2_drv.o de2_crtc.o de2_plane.o
+
+obj-$(CONFIG_DRM_SUN8I_DE2) += sun8i-de2-drm.o
diff --git a/drivers/gpu/drm/sun8i/de2_crtc.c b/drivers/gpu/drm/sun8i/de2_crtc.c
new file mode 100644
index 0000000..4e94ccc
--- /dev/null
+++ b/drivers/gpu/drm/sun8i/de2_crtc.c
@@ -0,0 +1,449 @@
+/*
+ * Allwinner DRM driver - DE2 CRTC
+ *
+ * Copyright (C) 2016 Jean-Francois Moine <moinejf-GANU6spQydw@public.gmane.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <linux/component.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_atomic_helper.h>
+#include <linux/io.h>
+#include <linux/of_irq.h>
+#include <linux/of_graph.h>
+
+#include "de2_drv.h"
+#include "de2_crtc.h"
+
+/* I/O map */
+
+#define TCON_GCTL_REG		0x00
+#define		TCON_GCTL_TCON_ENABLE BIT(31)
+#define TCON_GINT0_REG		0x04
+#define		TCON_GINT0_TCON1_Vb_Int_En BIT(30)
+#define		TCON_GINT0_TCON1_Vb_Int_Flag BIT(14)
+#define		TCON_GINT0_TCON1_Vb_Line_Int_Flag BIT(12)
+#define TCON0_CTL_REG		0x40
+#define		TCON0_CTL_TCON_ENABLE BIT(31)
+#define TCON1_CTL_REG		0x90
+#define		TCON1_CTL_TCON_ENABLE BIT(31)
+#define		TCON1_CTL_INTERLACE_ENABLE BIT(20)
+#define		TCON1_CTL_Start_Delay_SHIFT 4
+#define		TCON1_CTL_Start_Delay_MASK GENMASK(8, 4)
+#define TCON1_BASIC0_REG	0x94	/* XI/YI */
+#define TCON1_BASIC1_REG	0x98	/* LS_XO/LS_YO */
+#define TCON1_BASIC2_REG	0x9c	/* XO/YO */
+#define TCON1_BASIC3_REG	0xa0	/* HT/HBP */
+#define TCON1_BASIC4_REG	0xa4	/* VT/VBP */
+#define TCON1_BASIC5_REG	0xa8	/* HSPW/VSPW */
+#define TCON1_PS_SYNC_REG	0xb0
+#define TCON1_IO_POL_REG	0xf0
+#define		TCON1_IO_POL_IO0_inv BIT(24)
+#define		TCON1_IO_POL_IO1_inv BIT(25)
+#define		TCON1_IO_POL_IO2_inv BIT(26)
+#define TCON1_IO_TRI_REG	0xf4
+#define TCON_CEU_CTL_REG	0x100
+#define		TCON_CEU_CTL_ceu_en BIT(31)
+#define	TCON1_FILL_CTL_REG	0x300
+#define TCON1_FILL_START0_REG	0x304
+#define TCON1_FILL_END0_REG	0x308
+#define TCON1_FILL_DATA0_REG	0x30c
+
+#define XY(x, y) (((x) << 16) | (y))
+
+#define andl_relaxed(addr, val) \
+	writel_relaxed(readl_relaxed(addr) & val, addr)
+#define orl_relaxed(addr, val) \
+	writel_relaxed(readl_relaxed(addr) | val, addr)
+
+/* vertical blank functions */
+
+static void de2_atomic_flush(struct drm_crtc *crtc,
+			struct drm_crtc_state *old_state)
+{
+	struct drm_pending_vblank_event *event = crtc->state->event;
+
+	if (event) {
+		crtc->state->event = NULL;
+		spin_lock_irq(&crtc->dev->event_lock);
+		if (drm_crtc_vblank_get(crtc) == 0)
+			drm_crtc_arm_vblank_event(crtc, event);
+		else
+			drm_crtc_send_vblank_event(crtc, event);
+		spin_unlock_irq(&crtc->dev->event_lock);
+	}
+}
+
+static irqreturn_t de2_lcd_irq(int irq, void *dev_id)
+{
+	struct lcd *lcd = (struct lcd *) dev_id;
+	u32 isr;
+
+	isr = readl_relaxed(lcd->mmio + TCON_GINT0_REG);
+
+	drm_crtc_handle_vblank(&lcd->crtc);
+
+	writel_relaxed(isr &
+			~(TCON_GINT0_TCON1_Vb_Int_Flag |
+			  TCON_GINT0_TCON1_Vb_Line_Int_Flag),
+			lcd->mmio + TCON_GINT0_REG);
+
+	return IRQ_HANDLED;
+}
+
+int de2_enable_vblank(struct drm_device *drm, unsigned int crtc_ix)
+{
+	struct priv *priv = drm_to_priv(drm);
+	struct lcd *lcd = priv->lcds[crtc_ix];
+
+	orl_relaxed(lcd->mmio + TCON_GINT0_REG, TCON_GINT0_TCON1_Vb_Int_En);
+
+	return 0;
+}
+
+void de2_disable_vblank(struct drm_device *drm, unsigned int crtc_ix)
+{
+	struct priv *priv = drm_to_priv(drm);
+	struct lcd *lcd = priv->lcds[crtc_ix];
+
+	andl_relaxed(lcd->mmio + TCON_GINT0_REG, ~TCON_GINT0_TCON1_Vb_Int_En);
+}
+
+void de2_vblank_reset(struct lcd *lcd)
+{
+	drm_crtc_vblank_reset(&lcd->crtc);
+}
+
+/* frame functions */
+static int de2_crtc_set_clock(struct lcd *lcd, int rate)
+{
+	struct clk *parent_clk;
+	u32 parent_rate;
+	int ret;
+
+	/* determine and set the best rate for the parent clock (pll-video) */
+	if ((270000 * 2) % rate == 0)
+		parent_rate = 270000000;
+	else if (297000 % rate == 0)
+		parent_rate = 297000000;
+	else
+		return -EINVAL;			/* unsupported clock */
+
+	parent_clk = clk_get_parent(lcd->clk);
+
+	ret = clk_set_rate(parent_clk, parent_rate);
+	if (ret) {
+		dev_err(lcd->dev, "set parent rate failed %d\n", ret);
+		return ret;
+	}
+	ret = clk_set_rate(lcd->clk, rate * 1000);
+	if (ret) {
+		dev_err(lcd->dev, "set rate failed %d\n", ret);
+		return ret;
+	}
+
+	/* enable the clock */
+	reset_control_deassert(lcd->reset);
+	clk_prepare_enable(lcd->bus);
+	clk_prepare_enable(lcd->clk);
+
+	return ret;
+}
+
+static void de2_tcon_init(struct lcd *lcd)
+{
+	andl_relaxed(lcd->mmio + TCON0_CTL_REG, ~TCON0_CTL_TCON_ENABLE);
+	andl_relaxed(lcd->mmio + TCON1_CTL_REG, ~TCON1_CTL_TCON_ENABLE);
+	andl_relaxed(lcd->mmio + TCON_GCTL_REG, ~TCON_GCTL_TCON_ENABLE);
+
+	/* disable/ack interrupts */
+	writel_relaxed(0, lcd->mmio + TCON_GINT0_REG);
+}
+
+static void de2_tcon_enable(struct lcd *lcd)
+{
+	struct drm_crtc *crtc = &lcd->crtc;
+	const struct drm_display_mode *mode = &crtc->mode;
+	int interlace = mode->flags & DRM_MODE_FLAG_INTERLACE ? 2 : 1;
+	int start_delay;
+	u32 data;
+
+	orl_relaxed(lcd->mmio + TCON_GCTL_REG, TCON_GCTL_TCON_ENABLE);
+
+	data = XY(mode->hdisplay - 1, mode->vdisplay / interlace - 1);
+	writel_relaxed(data, lcd->mmio + TCON1_BASIC0_REG);
+	writel_relaxed(data, lcd->mmio + TCON1_BASIC1_REG);
+	writel_relaxed(data, lcd->mmio + TCON1_BASIC2_REG);
+	writel_relaxed(XY(mode->htotal - 1,
+			 mode->htotal - mode->hsync_start - 1),
+		      lcd->mmio + TCON1_BASIC3_REG);
+	writel_relaxed(XY(mode->vtotal * (3 - interlace),
+			 mode->vtotal - mode->vsync_start - 1),
+		      lcd->mmio + TCON1_BASIC4_REG);
+	writel_relaxed(XY(mode->hsync_end - mode->hsync_start - 1,
+			 mode->vsync_end - mode->vsync_start - 1),
+		      lcd->mmio + TCON1_BASIC5_REG);
+
+	data = TCON1_IO_POL_IO2_inv;
+	if (mode->flags & DRM_MODE_FLAG_PVSYNC)
+		data |= TCON1_IO_POL_IO0_inv;
+	if (mode->flags & DRM_MODE_FLAG_PHSYNC)
+		data |= TCON1_IO_POL_IO1_inv;
+	writel_relaxed(data, lcd->mmio + TCON1_IO_POL_REG);
+
+	andl_relaxed(lcd->mmio + TCON_CEU_CTL_REG, ~TCON_CEU_CTL_ceu_en);
+
+	if (interlace == 2)
+		orl_relaxed(lcd->mmio + TCON1_CTL_REG,
+			    TCON1_CTL_INTERLACE_ENABLE);
+	else
+		andl_relaxed(lcd->mmio + TCON1_CTL_REG,
+			     ~TCON1_CTL_INTERLACE_ENABLE);
+
+	writel_relaxed(0, lcd->mmio + TCON1_FILL_CTL_REG);
+	writel_relaxed(mode->vtotal + 1, lcd->mmio + TCON1_FILL_START0_REG);
+	writel_relaxed(mode->vtotal, lcd->mmio + TCON1_FILL_END0_REG);
+	writel_relaxed(0, lcd->mmio + TCON1_FILL_DATA0_REG);
+
+	start_delay = (mode->vtotal - mode->vdisplay) / interlace - 5;
+	if (start_delay > 31)
+		start_delay = 31;
+	data = readl_relaxed(lcd->mmio + TCON1_CTL_REG);
+	data &= ~TCON1_CTL_Start_Delay_MASK;
+	data |= start_delay << TCON1_CTL_Start_Delay_SHIFT;
+	writel_relaxed(data, lcd->mmio + TCON1_CTL_REG);
+
+	orl_relaxed(lcd->mmio + TCON1_CTL_REG, TCON1_CTL_TCON_ENABLE);
+}
+
+static void de2_tcon_disable(struct lcd *lcd)
+{
+	andl_relaxed(lcd->mmio + TCON1_CTL_REG, ~TCON1_CTL_TCON_ENABLE);
+	andl_relaxed(lcd->mmio + TCON_GCTL_REG, ~TCON_GCTL_TCON_ENABLE);
+}
+
+static void de2_crtc_enable(struct drm_crtc *crtc)
+{
+	struct lcd *lcd = crtc_to_lcd(crtc);
+	struct drm_display_mode *mode = &crtc->mode;
+
+	if (de2_crtc_set_clock(lcd, mode->clock) < 0)
+		return;
+	lcd->clk_enabled = true;
+
+	/* start the TCON and the DE */
+	de2_tcon_enable(lcd);
+	de2_de_enable(lcd);
+
+	/* turn on blanking interrupt */
+	drm_crtc_vblank_on(crtc);
+}
+
+static void de2_crtc_disable(struct drm_crtc *crtc,
+				struct drm_crtc_state *old_crtc_state)
+{
+	struct lcd *lcd = crtc_to_lcd(crtc);
+
+	if (!lcd->clk_enabled)
+		return;			/* already disabled */
+	lcd->clk_enabled = false;
+
+	de2_de_disable(lcd);
+
+	drm_crtc_vblank_off(crtc);
+
+	de2_tcon_disable(lcd);
+
+	clk_disable_unprepare(lcd->clk);
+	clk_disable_unprepare(lcd->bus);
+	reset_control_assert(lcd->reset);
+}
+
+static const struct drm_crtc_funcs de2_crtc_funcs = {
+	.destroy	= drm_crtc_cleanup,
+	.set_config	= drm_atomic_helper_set_config,
+	.page_flip	= drm_atomic_helper_page_flip,
+	.reset		= drm_atomic_helper_crtc_reset,
+	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
+};
+
+static const struct drm_crtc_helper_funcs de2_crtc_helper_funcs = {
+	.atomic_flush	= de2_atomic_flush,
+	.enable		= de2_crtc_enable,
+	.atomic_disable	= de2_crtc_disable,
+};
+
+/* device init */
+static int de2_lcd_bind(struct device *dev, struct device *master,
+			void *data)
+{
+	struct drm_device *drm = data;
+	struct priv *priv = drm_to_priv(drm);
+	struct lcd *lcd = dev_get_drvdata(dev);
+	struct drm_crtc *crtc = &lcd->crtc;
+	int ret, i, crtc_ix;
+
+	lcd->priv = priv;
+
+	/* set the CRTC reference */
+	crtc_ix = drm_crtc_index(crtc);
+	if (crtc_ix >= ARRAY_SIZE(priv->lcds)) {
+		dev_err(drm->dev, "Bad crtc index");
+		return -ENOENT;
+	}
+	priv->lcds[crtc_ix] = lcd;
+
+	/* and the mixer index (DT port index in the DE) */
+	for (i = 0; ; i++) {
+		struct device_node *port;
+
+		port = of_parse_phandle(drm->dev->of_node, "ports", i);
+		if (!port)
+			break;
+		if (port == lcd->crtc.port) {
+			lcd->mixer = i;
+			break;
+		}
+	}
+
+	ret = de2_plane_init(drm, lcd);
+	if (ret < 0)
+		return ret;
+
+	drm_crtc_helper_add(crtc, &de2_crtc_helper_funcs);
+
+	return drm_crtc_init_with_planes(drm, crtc,
+					 &lcd->planes[DE2_PRIMARY_PLANE],
+					 &lcd->planes[DE2_CURSOR_PLANE],
+					 &de2_crtc_funcs, NULL);
+}
+
+static void de2_lcd_unbind(struct device *dev, struct device *master,
+			   void *data)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct lcd *lcd = platform_get_drvdata(pdev);
+
+	if (lcd->priv)
+		lcd->priv->lcds[drm_crtc_index(&lcd->crtc)] = NULL;
+}
+
+static const struct component_ops de2_lcd_ops = {
+	.bind = de2_lcd_bind,
+	.unbind = de2_lcd_unbind,
+};
+
+static int de2_lcd_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node, *tmp, *parent, *port;
+	struct lcd *lcd;
+	struct resource *res;
+	int id, irq, ret;
+
+	lcd = devm_kzalloc(dev, sizeof(*lcd), GFP_KERNEL);
+	if (!lcd)
+		return -ENOMEM;
+
+	dev_set_drvdata(dev, lcd);
+	lcd->dev = dev;
+	lcd->mixer = id;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(dev, "failed to get memory resource\n");
+		return -EINVAL;
+	}
+
+	lcd->mmio = devm_ioremap_resource(dev, res);
+	if (IS_ERR(lcd->mmio)) {
+		dev_err(dev, "failed to map registers\n");
+		return PTR_ERR(lcd->mmio);
+	}
+
+	/* possible CRTC */
+	parent = np;
+	tmp = of_get_child_by_name(np, "ports");
+	if (tmp)
+		parent = tmp;
+	port = of_get_child_by_name(parent, "port");
+	of_node_put(tmp);
+	if (!port) {
+		dev_err(dev, "no port node\n");
+		return -ENXIO;
+	}
+	lcd->crtc.port = port;
+
+	lcd->bus = devm_clk_get(dev, "bus");
+	if (IS_ERR(lcd->bus)) {
+		dev_err(dev, "get bus clock err %d\n", (int) PTR_ERR(lcd->bus));
+		ret = PTR_ERR(lcd->bus);
+		goto err;
+	}
+
+	lcd->clk = devm_clk_get(dev, "clock");
+	if (IS_ERR(lcd->clk)) {
+		ret = PTR_ERR(lcd->clk);
+		dev_err(dev, "get video clock err %d\n", ret);
+		goto err;
+	}
+
+	lcd->reset = devm_reset_control_get(dev, NULL);
+	if (IS_ERR(lcd->reset)) {
+		ret = PTR_ERR(lcd->reset);
+		dev_err(dev, "get reset err %d\n", ret);
+		goto err;
+	}
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq <= 0) {
+		dev_err(dev, "unable to get irq\n");
+		ret = -EINVAL;
+		goto err;
+	}
+
+	de2_tcon_init(lcd);		/* stop TCON and avoid interrupts */
+
+	ret = devm_request_irq(dev, irq, de2_lcd_irq, 0,
+				dev_name(dev), lcd);
+	if (ret < 0) {
+		dev_err(dev, "unable to request irq %d\n", irq);
+		goto err;
+	}
+
+	return component_add(dev, &de2_lcd_ops);
+
+err:
+	of_node_put(lcd->crtc.port);
+	return ret;
+}
+
+static int de2_lcd_remove(struct platform_device *pdev)
+{
+	struct lcd *lcd = platform_get_drvdata(pdev);
+
+	component_del(&pdev->dev, &de2_lcd_ops);
+
+	of_node_put(lcd->crtc.port);
+
+	return 0;
+}
+
+static const struct of_device_id de2_lcd_ids[] = {
+	{ .compatible = "allwinner,sun8i-a83t-tcon", },
+	{ }
+};
+
+struct platform_driver de2_lcd_platform_driver = {
+	.probe = de2_lcd_probe,
+	.remove = de2_lcd_remove,
+	.driver = {
+		.name = "sun8i-de2-tcon",
+		.of_match_table = of_match_ptr(de2_lcd_ids),
+	},
+};
diff --git a/drivers/gpu/drm/sun8i/de2_crtc.h b/drivers/gpu/drm/sun8i/de2_crtc.h
new file mode 100644
index 0000000..c0d34a7
--- /dev/null
+++ b/drivers/gpu/drm/sun8i/de2_crtc.h
@@ -0,0 +1,50 @@
+#ifndef __DE2_CRTC_H__
+#define __DE2_CRTC_H__
+/*
+ * Copyright (C) 2016 Jean-François Moine
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <drm/drm_plane_helper.h>
+
+struct clk;
+struct reset_control;
+struct priv;
+
+/* planes */
+#define DE2_PRIMARY_PLANE 0
+#define DE2_CURSOR_PLANE 1
+#define DE2_N_PLANES 5	/* number of planes - see plane_tb[] in de2_plane.c */
+
+struct lcd {
+	void __iomem *mmio;
+
+	struct device *dev;
+	struct drm_crtc crtc;
+
+	struct priv *priv;	/* DRM/DE private data */
+
+	u8 mixer;		/* LCD (mixer) number */
+	u8 delayed;		/* bitmap of planes with delayed update */
+
+	u8 clk_enabled;		/* used for error in crtc_enable */
+
+	struct clk *clk;
+	struct clk *bus;
+	struct reset_control *reset;
+
+	struct drm_plane planes[DE2_N_PLANES];
+};
+
+#define crtc_to_lcd(x) container_of(x, struct lcd, crtc)
+
+/* in de2_plane.c */
+void de2_de_enable(struct lcd *lcd);
+void de2_de_disable(struct lcd *lcd);
+int de2_plane_init(struct drm_device *drm, struct lcd *lcd);
+
+#endif /* __DE2_CRTC_H__ */
diff --git a/drivers/gpu/drm/sun8i/de2_drv.c b/drivers/gpu/drm/sun8i/de2_drv.c
new file mode 100644
index 0000000..f96babe
--- /dev/null
+++ b/drivers/gpu/drm/sun8i/de2_drv.c
@@ -0,0 +1,317 @@
+/*
+ * Allwinner DRM driver - DE2 DRM driver
+ *
+ * Copyright (C) 2016 Jean-Francois Moine <moinejf-GANU6spQydw@public.gmane.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <drm/drm_of.h>
+#include <linux/component.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+
+#include "de2_drv.h"
+
+#define DRIVER_NAME	"sun8i-de2"
+#define DRIVER_DESC	"Allwinner DRM DE2"
+#define DRIVER_DATE	"20161101"
+#define DRIVER_MAJOR	1
+#define DRIVER_MINOR	0
+
+static const struct of_device_id de2_drm_of_match[] = {
+	{ .compatible = "allwinner,sun8i-a83t-display-engine",
+				.data = (void *) SOC_A83T },
+	{ .compatible = "allwinner,sun8i-h3-display-engine",
+				.data = (void *) SOC_H3 },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, de2_drm_of_match);
+
+static void de2_fb_output_poll_changed(struct drm_device *drm)
+{
+	struct priv *priv = drm_to_priv(drm);
+
+	if (priv->fbdev)
+		drm_fbdev_cma_hotplug_event(priv->fbdev);
+}
+
+static const struct drm_mode_config_funcs de2_mode_config_funcs = {
+	.fb_create = drm_fb_cma_create,
+	.output_poll_changed = de2_fb_output_poll_changed,
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
+};
+
+/* -- DRM operations -- */
+
+static void de2_lastclose(struct drm_device *drm)
+{
+	struct priv *priv = drm_to_priv(drm);
+
+	if (priv->fbdev)
+		drm_fbdev_cma_restore_mode(priv->fbdev);
+}
+
+static const struct file_operations de2_fops = {
+	.owner		= THIS_MODULE,
+	.open		= drm_open,
+	.release	= drm_release,
+	.unlocked_ioctl	= drm_ioctl,
+	.poll		= drm_poll,
+	.read		= drm_read,
+	.llseek		= no_llseek,
+	.mmap		= drm_gem_cma_mmap,
+};
+
+static struct drm_driver de2_drm_driver = {
+	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
+					DRIVER_ATOMIC,
+	.lastclose		= de2_lastclose,
+	.get_vblank_counter	= drm_vblank_no_hw_counter,
+	.enable_vblank		= de2_enable_vblank,
+	.disable_vblank		= de2_disable_vblank,
+	.gem_free_object	= drm_gem_cma_free_object,
+	.gem_vm_ops		= &drm_gem_cma_vm_ops,
+	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
+	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
+	.gem_prime_import	= drm_gem_prime_import,
+	.gem_prime_export	= drm_gem_prime_export,
+	.gem_prime_get_sg_table	= drm_gem_cma_prime_get_sg_table,
+	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
+	.gem_prime_vmap		= drm_gem_cma_prime_vmap,
+	.gem_prime_vunmap	= drm_gem_cma_prime_vunmap,
+	.gem_prime_mmap		= drm_gem_cma_prime_mmap,
+	.dumb_create		= drm_gem_cma_dumb_create,
+	.dumb_map_offset	= drm_gem_cma_dumb_map_offset,
+	.dumb_destroy		= drm_gem_dumb_destroy,
+	.fops			= &de2_fops,
+	.name			= DRIVER_NAME,
+	.desc			= DRIVER_DESC,
+	.date			= DRIVER_DATE,
+	.major			= DRIVER_MAJOR,
+	.minor			= DRIVER_MINOR,
+};
+
+/*
+ * Platform driver
+ */
+
+static int de2_drm_bind(struct device *dev)
+{
+	struct drm_device *drm;
+	struct priv *priv;
+	struct resource *res;
+	struct lcd *lcd;
+	int i, ret;
+
+	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	drm = &priv->drm;
+	dev_set_drvdata(dev, drm);
+
+	/* get the resources */
+	priv->soc_type = (int) of_match_device(de2_drm_of_match, dev)->data;
+
+	res = platform_get_resource(to_platform_device(dev),
+				IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(dev, "failed to get memory resource\n");
+		ret = -EINVAL;
+		goto out1;
+	}
+
+	priv->mmio = devm_ioremap_resource(dev, res);
+	if (IS_ERR(priv->mmio)) {
+		ret = PTR_ERR(priv->mmio);
+		dev_err(dev, "failed to map registers %d\n", ret);
+		goto out1;
+	}
+
+	priv->gate = devm_clk_get(dev, "bus");
+	if (IS_ERR(priv->gate)) {
+		ret = PTR_ERR(priv->gate);
+		dev_err(dev, "bus gate err %d\n", ret);
+		goto out1;
+	}
+
+	priv->clk = devm_clk_get(dev, "clock");
+	if (IS_ERR(priv->clk)) {
+		ret = PTR_ERR(priv->clk);
+		dev_err(dev, "clock err %d\n", ret);
+		goto out1;
+	}
+
+	priv->reset = devm_reset_control_get(dev, NULL);
+	if (IS_ERR(priv->reset)) {
+		ret = PTR_ERR(priv->reset);
+		dev_err(dev, "reset err %d\n", ret);
+		goto out1;
+	}
+
+	mutex_init(&priv->mutex);	/* protect DE I/O accesses */
+
+	ret = drm_dev_init(drm, &de2_drm_driver, dev);
+	if (ret != 0) {
+		dev_err(dev, "dev_init failed %d\n", ret);
+		goto out1;
+	}
+
+	drm_mode_config_init(drm);
+	drm->mode_config.min_width = 32;	/* needed for cursor */
+	drm->mode_config.min_height = 32;
+	drm->mode_config.max_width = 1920;
+	drm->mode_config.max_height = 1080;
+	drm->mode_config.funcs = &de2_mode_config_funcs;
+
+	drm->irq_enabled = true;
+
+	/* start the subdevices */
+	ret = component_bind_all(dev, drm);
+	if (ret < 0)
+		goto out2;
+
+	/* initialize and disable vertical blanking on all CRTCs */
+	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
+	if (ret < 0)
+		dev_warn(dev, "vblank_init failed %d\n", ret);
+
+	for (i = 0; i < ARRAY_SIZE(priv->lcds); i++) {
+		lcd = priv->lcds[i];
+		if (lcd)
+			de2_vblank_reset(lcd);
+	}
+
+	drm_mode_config_reset(drm);
+
+	priv->fbdev = drm_fbdev_cma_init(drm,
+					 32,	/* bpp */
+					 drm->mode_config.num_crtc,
+					 drm->mode_config.num_connector);
+	if (IS_ERR(priv->fbdev)) {
+		ret = PTR_ERR(priv->fbdev);
+		priv->fbdev = NULL;
+		goto out3;
+	}
+
+	drm_kms_helper_poll_init(drm);
+
+	ret = drm_dev_register(drm, 0);
+	if (ret < 0)
+		goto out4;
+
+	return 0;
+
+out4:
+	drm_fbdev_cma_fini(priv->fbdev);
+out3:
+	component_unbind_all(dev, drm);
+out2:
+	drm_dev_unref(drm);
+out1:
+	kfree(priv);
+	return ret;
+}
+
+static void de2_drm_unbind(struct device *dev)
+{
+	struct drm_device *drm = dev_get_drvdata(dev);
+	struct priv *priv = drm_to_priv(drm);
+
+	drm_dev_unregister(drm);
+
+	drm_fbdev_cma_fini(priv->fbdev);
+	drm_kms_helper_poll_fini(drm);
+	drm_vblank_cleanup(drm);
+	drm_mode_config_cleanup(drm);
+
+	component_unbind_all(dev, drm);
+
+	kfree(priv);
+}
+
+static const struct component_master_ops de2_drm_comp_ops = {
+	.bind = de2_drm_bind,
+	.unbind = de2_drm_unbind,
+};
+
+/*
+ * drm_of_component_probe() does:
+ * - bind of the ports (lcd-controller.port)
+ * - bind of the remote nodes (hdmi, tve..)
+ */
+static int compare_of(struct device *dev, void *data)
+{
+	struct device_node *np = data;
+
+	if (of_node_cmp(np->name, "port") == 0) {
+		np = of_get_parent(np);
+		of_node_put(np);
+	}
+	return dev->of_node == np;
+}
+
+static int de2_drm_probe(struct platform_device *pdev)
+{
+	int ret;
+
+	ret = drm_of_component_probe(&pdev->dev,
+				     compare_of,
+				     &de2_drm_comp_ops);
+	if (ret == -EINVAL)
+		ret = -ENXIO;
+	return ret;
+}
+
+static int de2_drm_remove(struct platform_device *pdev)
+{
+	component_master_del(&pdev->dev, &de2_drm_comp_ops);
+
+	return 0;
+}
+
+static struct platform_driver de2_drm_platform_driver = {
+	.probe      = de2_drm_probe,
+	.remove     = de2_drm_remove,
+	.driver     = {
+		.name = DRIVER_NAME,
+		.of_match_table = de2_drm_of_match,
+	},
+};
+
+static int __init de2_drm_init(void)
+{
+	int ret;
+
+	ret = platform_driver_register(&de2_lcd_platform_driver);
+	if (ret < 0)
+		return ret;
+
+	ret = platform_driver_register(&de2_drm_platform_driver);
+	if (ret < 0)
+		platform_driver_unregister(&de2_lcd_platform_driver);
+
+	return ret;
+}
+
+static void __exit de2_drm_fini(void)
+{
+	platform_driver_unregister(&de2_lcd_platform_driver);
+	platform_driver_unregister(&de2_drm_platform_driver);
+}
+
+module_init(de2_drm_init);
+module_exit(de2_drm_fini);
+
+MODULE_AUTHOR("Jean-Francois Moine <moinejf-GANU6spQydw@public.gmane.org>");
+MODULE_DESCRIPTION("Allwinner DE2 DRM Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/sun8i/de2_drv.h b/drivers/gpu/drm/sun8i/de2_drv.h
new file mode 100644
index 0000000..c42c30a
--- /dev/null
+++ b/drivers/gpu/drm/sun8i/de2_drv.h
@@ -0,0 +1,48 @@
+#ifndef __DE2_DRM_H__
+#define __DE2_DRM_H__
+/*
+ * Copyright (C) 2016 Jean-François Moine
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <drm/drmP.h>
+#include <linux/clk.h>
+#include <linux/reset.h>
+
+struct drm_fbdev_cma;
+struct lcd;
+
+#define N_LCDS 2
+
+struct priv {
+	struct drm_device drm;
+	void __iomem *mmio;
+	struct clk *clk;
+	struct clk *gate;
+	struct reset_control *reset;
+
+	struct mutex mutex;	/* protect DE I/O access */
+	u8 soc_type;
+#define SOC_A83T 0
+#define SOC_H3 1
+	u8 started;		/* bitmap of started mixers */
+	u8 clean;		/* bitmap of clean mixers */
+
+	struct drm_fbdev_cma *fbdev;
+
+	struct lcd *lcds[N_LCDS]; /* CRTCs */
+};
+
+#define drm_to_priv(x) container_of(x, struct priv, drm)
+
+/* in de2_crtc.c */
+int de2_enable_vblank(struct drm_device *drm, unsigned int crtc);
+void de2_disable_vblank(struct drm_device *drm, unsigned int crtc);
+void de2_vblank_reset(struct lcd *lcd);
+extern struct platform_driver de2_lcd_platform_driver;
+
+#endif /* __DE2_DRM_H__ */
diff --git a/drivers/gpu/drm/sun8i/de2_plane.c b/drivers/gpu/drm/sun8i/de2_plane.c
new file mode 100644
index 0000000..2fd72dc
--- /dev/null
+++ b/drivers/gpu/drm/sun8i/de2_plane.c
@@ -0,0 +1,734 @@
+/*
+ * Allwinner DRM driver - Display Engine 2
+ *
+ * Copyright (C) 2016 Jean-Francois Moine <moinejf-GANU6spQydw@public.gmane.org>
+ * Adapted from the sun8iw6 and sun8iw7 disp2 drivers
+ *	Copyright (c) 2016 Allwinnertech Co., Ltd.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <linux/io.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_plane_helper.h>
+
+#include "de2_drv.h"
+#include "de2_crtc.h"
+
+/* DE2 I/O map */
+
+#define DE2_MOD_REG 0x0000		/* 1 bit per LCD */
+#define DE2_GATE_REG 0x0004
+#define DE2_RESET_REG 0x0008
+#define DE2_DIV_REG 0x000c		/* 4 bits per LCD */
+#define DE2_SEL_REG 0x0010
+
+#define DE2_MIXER0_BASE 0x00100000	/* LCD 0 */
+#define DE2_MIXER1_BASE 0x00200000	/* LCD 1 */
+
+/* mixer registers (addr / mixer base) */
+#define MIXER_GLB_REGS	0x00000		/* global control */
+#define MIXER_BLD_REGS	0x01000		/* alpha blending */
+#define MIXER_CHAN_REGS 0x02000		/* VI/UI overlay channels */
+#define		MIXER_CHAN_SZ 0x1000	/* size of a channel */
+#define MIXER_VSU_REGS	0x20000		/* VSU */
+#define MIXER_GSU1_REGS 0x30000		/* GSUs */
+#define MIXER_GSU2_REGS 0x40000
+#define MIXER_GSU3_REGS 0x50000
+#define MIXER_FCE_REGS	0xa0000		/* FCE */
+#define MIXER_BWS_REGS	0xa2000		/* BWS */
+#define MIXER_LTI_REGS	0xa4000		/* LTI */
+#define MIXER_PEAK_REGS 0xa6000		/* PEAK */
+#define MIXER_ASE_REGS	0xa8000		/* ASE */
+#define MIXER_FCC_REGS	0xaa000		/* FCC */
+#define MIXER_DCSC_REGS 0xb0000		/* DCSC/SMBL */
+
+/* global control */
+#define MIXER_GLB_CTL_REG	0x00
+#define		MIXER_GLB_CTL_rt_en BIT(0)
+#define		MIXER_GLB_CTL_finish_irq_en BIT(4)
+#define		MIXER_GLB_CTL_rtwb_port BIT(12)
+#define MIXER_GLB_STATUS_REG	0x04
+#define MIXER_GLB_DBUFF_REG	0x08
+#define MIXER_GLB_SIZE_REG	0x0c
+
+/* alpha blending */
+#define MIXER_BLD_FCOLOR_CTL_REG	0x00
+#define		MIXER_BLD_FCOLOR_CTL_PEN(pipe)	(0x0100 << (pipe))
+#define	MIXER_BLD_ATTR_N 4		/* number of attribute blocks */
+#define	MIXER_BLD_ATTR_SIZE (4 * 4)	/* size of an attribute block */
+#define MIXER_BLD_ATTRx_FCOLOR(x)	(0x04 + MIXER_BLD_ATTR_SIZE * (x))
+#define MIXER_BLD_ATTRx_INSIZE(x)	(0x08 + MIXER_BLD_ATTR_SIZE * (x))
+#define MIXER_BLD_ATTRx_OFFSET(x)	(0x0c + MIXER_BLD_ATTR_SIZE * (x))
+#define MIXER_BLD_ROUTE_REG	0x80
+#define		MIXER_BLD_ROUTE(chan, pipe) ((chan) << ((pipe) * 4))
+#define MIXER_BLD_PREMULTIPLY_REG	0x84
+#define MIXER_BLD_BKCOLOR_REG	0x88
+#define MIXER_BLD_OUTPUT_SIZE_REG	0x8c
+#define MIXER_BLD_MODEx_REG(x)	(0x90 + 4 * (x))	/* x = 0..3 */
+#define		MIXER_BLD_MODE_SRCOVER	0x03010301
+#define MIXER_BLD_OUT_CTL_REG	0xfc
+
+/* VI channel (channel 0) */
+#define VI_CFG_N		4		/* number of layers */
+#define VI_CFG_SIZE		0x30		/* size of a layer */
+#define VI_CFGx_ATTR(l)		(0x00 + VI_CFG_SIZE * (l))
+#define		VI_CFG_ATTR_en BIT(0)
+#define		VI_CFG_ATTR_fcolor_en BIT(4)
+#define		VI_CFG_ATTR_fmt_SHIFT 8
+#define		VI_CFG_ATTR_fmt_MASK GENMASK(12, 8)
+#define		VI_CFG_ATTR_ui_sel BIT(15)
+#define		VI_CFG_ATTR_top_down BIT(23)
+#define VI_CFGx_SIZE(l)		(0x04 + VI_CFG_SIZE * (l))
+#define VI_CFGx_COORD(l)	(0x08 + VI_CFG_SIZE * (l))
+#define VI_N_PLANES 3
+#define VI_CFGx_PITCHy(l, p)	(0x0c + VI_CFG_SIZE * (l) + 4 * (p))
+#define VI_CFGx_TOP_LADDRy(l, p) (0x18 + VI_CFG_SIZE * (l) + 4 * (p))
+#define VI_CFGx_BOT_LADDRy(l, p) (0x24 + VI_CFG_SIZE * (l) + 4 * (p))
+#define VI_FCOLORx(l)		(0xc0 + 4 * (l))
+#define VI_TOP_HADDRx(p)	(0xd0 + 4 * (p))
+#define VI_BOT_HADDRx(p)	(0xdc + 4 * (p))
+#define VI_OVL_SIZEx(n)		(0xe8 + 4 * (n))
+#define VI_HORI_DSx(n)		(0xf0 + 4 * (n))
+#define VI_VERT_DSx(n)		(0xf8 + 4 * (n))
+#define VI_SIZE			0x100
+
+/* UI channel (channels 1..3) */
+#define UI_CFG_N		4		/* number of layers */
+#define UI_CFG_SIZE		(8 * 4)		/* size of a layer */
+#define UI_CFGx_ATTR(l)		(0x00 + UI_CFG_SIZE * (l))
+#define		UI_CFG_ATTR_en BIT(0)
+#define		UI_CFG_ATTR_alpmod_SHIFT 1
+#define		UI_CFG_ATTR_alpmod_MASK GENMASK(2, 1)
+#define		UI_CFG_ATTR_fcolor_en BIT(4)
+#define		UI_CFG_ATTR_fmt_SHIFT 8
+#define		UI_CFG_ATTR_fmt_MASK GENMASK(12, 8)
+#define		UI_CFG_ATTR_top_down BIT(23)
+#define		UI_CFG_ATTR_alpha_SHIFT 24
+#define		UI_CFG_ATTR_alpha_MASK GENMASK(31, 24)
+#define UI_CFGx_SIZE(l)		(0x04 + UI_CFG_SIZE * (l))
+#define UI_CFGx_COORD(l)	(0x08 + UI_CFG_SIZE * (l))
+#define UI_CFGx_PITCH(l)	(0x0c + UI_CFG_SIZE * (l))
+#define UI_CFGx_TOP_LADDR(l)	(0x10 + UI_CFG_SIZE * (l))
+#define UI_CFGx_BOT_LADDR(l)	(0x14 + UI_CFG_SIZE * (l))
+#define UI_CFGx_FCOLOR(l)	(0x18 + UI_CFG_SIZE * (l))
+#define UI_TOP_HADDR		0x80
+#define UI_BOT_HADDR		0x84
+#define UI_OVL_SIZE		0x88
+#define UI_SIZE			0x8c
+
+/* coordinates and sizes */
+#define XY(x, y) (((y) << 16) | (x))
+#define WH(w, h) ((((h) - 1) << 16) | ((w) - 1))
+
+/* UI video formats */
+#define DE2_FORMAT_ARGB_8888 0
+#define DE2_FORMAT_BGRA_8888 3
+#define DE2_FORMAT_XRGB_8888 4
+#define DE2_FORMAT_RGB_888 8
+#define DE2_FORMAT_BGR_888 9
+
+/* VI video formats */
+#define DE2_FORMAT_YUV422_I_YVYU 1	/* YVYU */
+#define DE2_FORMAT_YUV422_I_UYVY 2	/* UYVY */
+#define DE2_FORMAT_YUV422_I_YUYV 3	/* YUYV */
+#define DE2_FORMAT_YUV422_P 6		/* YYYY UU VV planar */
+#define DE2_FORMAT_YUV420_P 10		/* YYYY U V planar */
+
+/* plane formats */
+static const uint32_t ui_formats[] = {
+	DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_BGRA8888,
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_RGB888,
+	DRM_FORMAT_BGR888,
+};
+
+static const uint32_t vi_formats[] = {
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_YUYV,
+	DRM_FORMAT_YVYU,
+	DRM_FORMAT_YUV422,
+	DRM_FORMAT_YUV420,
+	DRM_FORMAT_UYVY,
+	DRM_FORMAT_BGRA8888,
+	DRM_FORMAT_RGB888,
+	DRM_FORMAT_BGR888,
+};
+
+/*
+ * plane table
+ *
+ * The chosen channel/layer assignment of the planes respects
+ * the following constraints:
+ * - the cursor must be in a channel higher than the primary channel
+ * - there are 4 channels in the LCD 0 and only 2 channels in the LCD 1
+ */
+static const struct {
+	u8 chan;
+	u8 layer;
+	u8 pipe;
+	u8 type;			/* plane type */
+	const uint32_t *formats;
+	u8 n_formats;
+} plane_tb[] = {
+	[DE2_PRIMARY_PLANE] = {		/* primary plane: channel 0 (VI) */
+		0, 0, 0,
+		DRM_PLANE_TYPE_PRIMARY,
+		ui_formats, ARRAY_SIZE(ui_formats),
+	},
+	[DE2_CURSOR_PLANE] = {		/* cursor: channel 1 (UI) */
+		1, 0, 1,
+		DRM_PLANE_TYPE_CURSOR,
+		ui_formats, ARRAY_SIZE(ui_formats),
+	},
+	{
+		0, 1, 0,		/* 1st overlay: channel 0, layer 1 */
+		DRM_PLANE_TYPE_OVERLAY,
+		vi_formats, ARRAY_SIZE(vi_formats),
+	},
+	{
+		0, 2, 0,		/* 2nd overlay: channel 0, layer 2 */
+		DRM_PLANE_TYPE_OVERLAY,
+		vi_formats, ARRAY_SIZE(vi_formats),
+	},
+	{
+		0, 3, 0,		/* 3rd overlay: channel 0, layer 3 */
+		DRM_PLANE_TYPE_OVERLAY,
+		vi_formats, ARRAY_SIZE(vi_formats),
+	},
+};
+
+static inline void andl_relaxed(void __iomem *addr, u32 val)
+{
+	writel_relaxed(readl_relaxed(addr) & val, addr);
+}
+
+static inline void orl_relaxed(void __iomem *addr, u32 val)
+{
+	writel_relaxed(readl_relaxed(addr) | val, addr);
+}
+
+/* alert the DE processor about changes in a mixer configuration */
+static void de2_mixer_select(struct priv *priv,
+			int mixer,
+			void __iomem *mixer_io)
+{
+	/* select the mixer */
+	andl_relaxed(priv->mmio + DE2_SEL_REG, ~1);
+
+	/* double register switch */
+	writel_relaxed(1, mixer_io + MIXER_GLB_REGS + MIXER_GLB_DBUFF_REG);
+}
+
+/*
+ * cleanup a mixer
+ *
+ * This is needed only once after power on.
+ */
+static void de2_mixer_cleanup(struct priv *priv, int mixer,
+				u32 size)
+{
+	void __iomem *mixer_io = priv->mmio;
+	void __iomem *chan_io;
+	u32 data;
+	unsigned int i;
+
+	mixer_io += (mixer == 0) ? DE2_MIXER0_BASE : DE2_MIXER1_BASE;
+	chan_io = mixer_io + MIXER_CHAN_REGS;
+
+	andl_relaxed(priv->mmio + DE2_SEL_REG, ~1);
+	writel_relaxed(1, mixer_io + MIXER_GLB_REGS + MIXER_GLB_DBUFF_REG);
+
+	writel_relaxed(MIXER_GLB_CTL_rt_en,
+			mixer_io + MIXER_GLB_REGS + MIXER_GLB_CTL_REG);
+	writel_relaxed(0, mixer_io + MIXER_GLB_REGS + MIXER_GLB_STATUS_REG);
+
+	writel_relaxed(size, mixer_io + MIXER_GLB_REGS + MIXER_GLB_SIZE_REG);
+
+	/*
+	 * clear the VI/UI channels
+	 *	LCD0: 1 VI and 3 UIs
+	 *	LCD1: 1 VI and 1 UI
+	 */
+	memset_io(chan_io, 0, VI_SIZE);
+	memset_io(chan_io + MIXER_CHAN_SZ, 0, UI_SIZE);
+	if (mixer == 0) {
+		memset_io(chan_io + MIXER_CHAN_SZ * 2, 0, UI_SIZE);
+		memset_io(chan_io + MIXER_CHAN_SZ * 3, 0, UI_SIZE);
+	}
+
+	/* alpha blending */
+	writel_relaxed(0x00000001 |		/* fcolor for primary */
+			MIXER_BLD_FCOLOR_CTL_PEN(0),
+			mixer_io + MIXER_BLD_REGS + MIXER_BLD_FCOLOR_CTL_REG);
+	for (i = 0; i < MIXER_BLD_ATTR_N; i++) {
+		writel_relaxed(0xff000000,
+			mixer_io + MIXER_BLD_REGS + MIXER_BLD_ATTRx_FCOLOR(i));
+		writel_relaxed(size,
+			mixer_io + MIXER_BLD_REGS + MIXER_BLD_ATTRx_INSIZE(i));
+		writel_relaxed(0,
+			mixer_io + MIXER_BLD_REGS + MIXER_BLD_ATTRx_OFFSET(i));
+	}
+	writel_relaxed(0, mixer_io + MIXER_BLD_REGS + MIXER_BLD_OUT_CTL_REG);
+
+	/* prepare the pipe route for the planes */
+	data = 0;
+	for (i = 0; i < DE2_N_PLANES; i++)
+		data |= MIXER_BLD_ROUTE(plane_tb[i].chan, plane_tb[i].pipe);
+	writel_relaxed(data, mixer_io + MIXER_BLD_REGS + MIXER_BLD_ROUTE_REG);
+
+	writel_relaxed(0, mixer_io + MIXER_BLD_REGS +
+			MIXER_BLD_PREMULTIPLY_REG);
+	writel_relaxed(0xff000000, mixer_io + MIXER_BLD_REGS +
+			MIXER_BLD_BKCOLOR_REG);
+	writel_relaxed(size, mixer_io + MIXER_BLD_REGS +
+			MIXER_BLD_OUTPUT_SIZE_REG);
+	writel_relaxed(MIXER_BLD_MODE_SRCOVER,
+			mixer_io + MIXER_BLD_REGS + MIXER_BLD_MODEx_REG(0));
+	writel_relaxed(MIXER_BLD_MODE_SRCOVER,
+			mixer_io + MIXER_BLD_REGS + MIXER_BLD_MODEx_REG(1));
+
+	/* disable the enhancements */
+	writel_relaxed(0, mixer_io + MIXER_VSU_REGS);
+	writel_relaxed(0, mixer_io + MIXER_GSU1_REGS);
+	writel_relaxed(0, mixer_io + MIXER_GSU2_REGS);
+	writel_relaxed(0, mixer_io + MIXER_GSU3_REGS);
+	writel_relaxed(0, mixer_io + MIXER_FCE_REGS);
+	writel_relaxed(0, mixer_io + MIXER_BWS_REGS);
+	writel_relaxed(0, mixer_io + MIXER_LTI_REGS);
+	writel_relaxed(0, mixer_io + MIXER_PEAK_REGS);
+	writel_relaxed(0, mixer_io + MIXER_ASE_REGS);
+	writel_relaxed(0, mixer_io + MIXER_FCC_REGS);
+	writel_relaxed(0, mixer_io + MIXER_DCSC_REGS);
+}
+
+/* enable a mixer */
+static void de2_mixer_enable(struct lcd *lcd)
+{
+	struct priv *priv = lcd->priv;
+	void __iomem *mixer_io = priv->mmio;
+	struct drm_display_mode *mode = &lcd->crtc.mode;
+	u32 size = WH(mode->hdisplay, mode->vdisplay);
+	u32 data;
+	int mixer = lcd->mixer;
+	int i;
+
+	mixer_io += (mixer == 0) ? DE2_MIXER0_BASE : DE2_MIXER1_BASE;
+
+	/* if not done yet, start the DE processor */
+	if (!priv->started) {
+		reset_control_deassert(priv->reset);
+		clk_prepare_enable(priv->gate);
+		clk_prepare_enable(priv->clk);
+	}
+	priv->started |= 1 << mixer;
+
+	/* set the A83T clock divider (500 / 2) = 250MHz */
+	if (priv->soc_type == SOC_A83T)
+		writel_relaxed(0x00000011, /* div = 2 for both LCDs */
+				priv->mmio + DE2_DIV_REG);
+
+	/* deassert the mixer and enable its clock */
+	orl_relaxed(priv->mmio + DE2_RESET_REG, mixer == 0 ? 1 : 4);
+	data = 1 << mixer;			/* 1 bit / lcd */
+	orl_relaxed(priv->mmio + DE2_GATE_REG, data);
+	orl_relaxed(priv->mmio + DE2_MOD_REG, data);
+
+	/* if not done yet, cleanup and enable */
+	if (!(priv->clean & (1 << mixer))) {
+		priv->clean |= 1 << mixer;
+		de2_mixer_cleanup(priv, mixer, size);
+		return;
+	}
+
+	/* enable */
+	de2_mixer_select(priv, mixer, mixer_io);
+
+	writel_relaxed(MIXER_GLB_CTL_rt_en,
+			mixer_io + MIXER_GLB_REGS + MIXER_GLB_CTL_REG);
+	writel_relaxed(0, mixer_io + MIXER_GLB_REGS + MIXER_GLB_STATUS_REG);
+
+	/* set the size of the frame buffer */
+	writel_relaxed(size, mixer_io + MIXER_GLB_REGS + MIXER_GLB_SIZE_REG);
+	for (i = 0; i < MIXER_BLD_ATTR_N; i++)
+		writel_relaxed(size, mixer_io + MIXER_BLD_REGS +
+				MIXER_BLD_ATTRx_INSIZE(i));
+	writel_relaxed(size, mixer_io + MIXER_BLD_REGS +
+			MIXER_BLD_OUTPUT_SIZE_REG);
+
+	writel_relaxed(mode->flags & DRM_MODE_FLAG_INTERLACE ? 2 : 0,
+			mixer_io + MIXER_BLD_REGS + MIXER_BLD_OUT_CTL_REG);
+}
+
+/* enable a LCD (DE mixer) */
+void de2_de_enable(struct lcd *lcd)
+{
+	mutex_lock(&lcd->priv->mutex);
+
+	de2_mixer_enable(lcd);
+
+	mutex_unlock(&lcd->priv->mutex);
+}
+
+/* disable a LCD (DE mixer) */
+void de2_de_disable(struct lcd *lcd)
+{
+	struct priv *priv = lcd->priv;
+	void __iomem *mixer_io = priv->mmio;
+	int mixer = lcd->mixer;
+	u32 data;
+
+	mixer_io += (mixer == 0) ? DE2_MIXER0_BASE : DE2_MIXER1_BASE;
+
+	mutex_lock(&priv->mutex);
+
+	de2_mixer_select(priv, mixer, mixer_io);
+
+	writel_relaxed(0, mixer_io + MIXER_GLB_REGS + MIXER_GLB_CTL_REG);
+
+	data = ~(1 << mixer);
+	andl_relaxed(priv->mmio + DE2_MOD_REG, data);
+	andl_relaxed(priv->mmio + DE2_GATE_REG, data);
+	andl_relaxed(priv->mmio + DE2_RESET_REG, data);
+
+	mutex_unlock(&priv->mutex);
+
+	/* if all mixers are disabled, stop the DE */
+	priv->started &= ~(1 << mixer);
+	if (!priv->started) {
+		clk_disable_unprepare(priv->clk);
+		clk_disable_unprepare(priv->gate);
+		reset_control_assert(priv->reset);
+	}
+}
+
+static void de2_vi_update(void __iomem *chan_io,
+			  struct drm_gem_cma_object *gem,
+			  int layer,
+			  unsigned int fmt,
+			  u32 ui_sel,
+			  u32 size,
+			  u32 coord,
+			  struct drm_framebuffer *fb,
+			  u32 screen_size)
+{
+	int i;
+
+	writel_relaxed(VI_CFG_ATTR_en |
+			(fmt << VI_CFG_ATTR_fmt_SHIFT) |
+			ui_sel,
+			chan_io + VI_CFGx_ATTR(layer));
+	writel_relaxed(size, chan_io + VI_CFGx_SIZE(layer));
+	writel_relaxed(coord, chan_io + VI_CFGx_COORD(layer));
+	for (i = 0; i < VI_N_PLANES; i++) {
+		writel_relaxed(fb->pitches[i] ? fb->pitches[i] :
+						fb->pitches[0],
+				chan_io + VI_CFGx_PITCHy(layer, i));
+		writel_relaxed(gem->paddr + fb->offsets[i],
+				chan_io + VI_CFGx_TOP_LADDRy(layer, i));
+	}
+	writel_relaxed(0xff000000, chan_io + VI_FCOLORx(layer));
+	if (layer == 0) {
+		writel_relaxed(screen_size,
+				chan_io + VI_OVL_SIZEx(0));
+	}
+}
+
+static void de2_ui_update(void __iomem *chan_io,
+			  struct drm_gem_cma_object *gem,
+			  int layer,
+			  unsigned int fmt,
+			  u32 alpha_glob,
+			  u32 size,
+			  u32 coord,
+			  struct drm_framebuffer *fb,
+			  u32 screen_size)
+{
+	writel_relaxed(UI_CFG_ATTR_en |
+			(fmt << UI_CFG_ATTR_fmt_SHIFT) |
+			alpha_glob,
+			chan_io + UI_CFGx_ATTR(layer));
+	writel_relaxed(size, chan_io + UI_CFGx_SIZE(layer));
+	writel_relaxed(coord, chan_io + UI_CFGx_COORD(layer));
+	writel_relaxed(fb->pitches[0], chan_io + UI_CFGx_PITCH(layer));
+	writel_relaxed(gem->paddr + fb->offsets[0],
+			chan_io + UI_CFGx_TOP_LADDR(layer));
+	if (layer == 0)
+		writel_relaxed(screen_size, chan_io + UI_OVL_SIZE);
+}
+
+static void de2_plane_update(struct priv *priv, struct lcd *lcd,
+				int plane_num,
+				struct drm_plane_state *state,
+				struct drm_plane_state *old_state)
+{
+	void __iomem *mixer_io = priv->mmio;
+	void __iomem *chan_io;
+	struct drm_framebuffer *fb = state->fb;
+	struct drm_gem_cma_object *gem;
+	u32 size = WH(state->crtc_w, state->crtc_h);
+	u32 coord, screen_size;
+	u32 fcolor;
+	u32 ui_sel, alpha_glob;
+	int mixer = lcd->mixer;
+	int chan, layer, x, y;
+	unsigned int fmt;
+
+	chan = plane_tb[plane_num].chan;
+	layer = plane_tb[plane_num].layer;
+
+	mixer_io += (mixer == 0) ? DE2_MIXER0_BASE : DE2_MIXER1_BASE;
+	chan_io = mixer_io + MIXER_CHAN_REGS + MIXER_CHAN_SZ * chan;
+
+	x = state->crtc_x >= 0 ? state->crtc_x : 0;
+	y = state->crtc_y >= 0 ? state->crtc_y : 0;
+	coord = XY(x, y);
+
+	/* if plane update was delayed, force a full update */
+	if (priv->lcds[drm_crtc_index(&lcd->crtc)]->delayed &
+			(1 << plane_num)) {
+		priv->lcds[drm_crtc_index(&lcd->crtc)]->delayed &=
+							~(1 << plane_num);
+
+	/* handle plane move */
+	} else if (fb == old_state->fb) {
+		de2_mixer_select(priv, mixer, mixer_io);
+		if (chan == 0)
+			writel_relaxed(coord, chan_io + VI_CFGx_COORD(layer));
+		else
+			writel_relaxed(coord, chan_io + UI_CFGx_COORD(layer));
+		return;
+	}
+
+	gem = drm_fb_cma_get_gem_obj(fb, 0);
+
+	ui_sel = alpha_glob = 0;
+
+	switch (fb->pixel_format) {
+	case DRM_FORMAT_ARGB8888:
+		fmt = DE2_FORMAT_ARGB_8888;
+		ui_sel = VI_CFG_ATTR_ui_sel;
+		break;
+	case DRM_FORMAT_BGRA8888:
+		fmt = DE2_FORMAT_BGRA_8888;
+		ui_sel = VI_CFG_ATTR_ui_sel;
+		break;
+	case DRM_FORMAT_XRGB8888:
+		fmt = DE2_FORMAT_XRGB_8888;
+		ui_sel = VI_CFG_ATTR_ui_sel;
+		alpha_glob = (1 << UI_CFG_ATTR_alpmod_SHIFT) |
+				(0xff << UI_CFG_ATTR_alpha_SHIFT);
+		break;
+	case DRM_FORMAT_RGB888:
+		fmt = DE2_FORMAT_RGB_888;
+		ui_sel = VI_CFG_ATTR_ui_sel;
+		break;
+	case DRM_FORMAT_BGR888:
+		fmt = DE2_FORMAT_BGR_888;
+		ui_sel = VI_CFG_ATTR_ui_sel;
+		break;
+	case DRM_FORMAT_YUYV:
+		fmt = DE2_FORMAT_YUV422_I_YUYV;
+		break;
+	case DRM_FORMAT_YVYU:
+		fmt = DE2_FORMAT_YUV422_I_YVYU;
+		break;
+	case DRM_FORMAT_YUV422:
+		fmt = DE2_FORMAT_YUV422_P;
+		break;
+	case DRM_FORMAT_YUV420:
+		fmt = DE2_FORMAT_YUV420_P;
+		break;
+	case DRM_FORMAT_UYVY:
+		fmt = DE2_FORMAT_YUV422_I_UYVY;
+		break;
+	default:
+		pr_err("de2_plane_update: format %.4s not yet treated\n",
+			(char *) &fb->pixel_format);
+		return;
+	}
+
+	/* the overlay size is the one of the primary plane */
+	screen_size = plane_num == DE2_PRIMARY_PLANE ?
+		size :
+		readl_relaxed(mixer_io + MIXER_GLB_REGS + MIXER_GLB_SIZE_REG);
+
+	/* prepare pipe enable */
+	fcolor = readl_relaxed(mixer_io + MIXER_BLD_REGS +
+				MIXER_BLD_FCOLOR_CTL_REG);
+	fcolor |= MIXER_BLD_FCOLOR_CTL_PEN(plane_tb[plane_num].pipe);
+
+	de2_mixer_select(priv, mixer, mixer_io);
+
+	if (chan == 0)				/* VI channel */
+		de2_vi_update(chan_io, gem, layer, fmt, ui_sel, size, coord,
+				fb, screen_size);
+	else					/* UI channel */
+		de2_ui_update(chan_io, gem, layer, fmt, alpha_glob, size, coord,
+				fb, screen_size);
+	writel_relaxed(fcolor, mixer_io + MIXER_BLD_REGS +
+				MIXER_BLD_FCOLOR_CTL_REG);
+}
+
+static int vi_nb_layers(void __iomem *chan_io)
+{
+	int layer, n = 0;
+
+	for (layer = 0; layer < 4; layer++) {
+		if (readl_relaxed(chan_io + VI_CFGx_ATTR(layer)) != 0)
+			n++;
+	}
+
+	return n;
+}
+
+static int ui_nb_layers(void __iomem *chan_io)
+{
+	int layer, n = 0;
+
+	for (layer = 0; layer < 4; layer++) {
+		if (readl_relaxed(chan_io + UI_CFGx_ATTR(layer)) != 0)
+			n++;
+	}
+
+	return n;
+}
+
+static void de2_plane_disable(struct priv *priv,
+				int mixer, int plane_num)
+{
+	void __iomem *mixer_io = priv->mmio;
+	void __iomem *chan_io;
+	u32 fcolor;
+	int chan, layer, n;
+
+	chan = plane_tb[plane_num].chan;
+	layer = plane_tb[plane_num].layer;
+
+	mixer_io += (mixer == 0) ? DE2_MIXER0_BASE : DE2_MIXER1_BASE;
+	chan_io = mixer_io + MIXER_CHAN_REGS + MIXER_CHAN_SZ * chan;
+
+	if (chan == 0)
+		n = vi_nb_layers(chan_io);
+	else
+		n = ui_nb_layers(chan_io);
+
+	fcolor = readl_relaxed(mixer_io + MIXER_BLD_REGS +
+			MIXER_BLD_FCOLOR_CTL_REG);
+
+	de2_mixer_select(priv, mixer, mixer_io);
+
+	if (chan == 0)
+		writel_relaxed(0, chan_io + VI_CFGx_ATTR(layer));
+	else
+		writel_relaxed(0, chan_io + UI_CFGx_ATTR(layer));
+
+	/* disable the pipe if no more active layer */
+	if (n <= 1)
+		writel_relaxed(fcolor &
+			~MIXER_BLD_FCOLOR_CTL_PEN(plane_tb[plane_num].pipe),
+			mixer_io + MIXER_BLD_REGS + MIXER_BLD_FCOLOR_CTL_REG);
+}
+
+static void de2_drm_plane_update(struct drm_plane *plane,
+				struct drm_plane_state *old_state)
+{
+	struct drm_plane_state *state = plane->state;
+	struct drm_crtc *crtc = state->crtc;
+	struct lcd *lcd = crtc_to_lcd(crtc);
+	struct priv *priv = lcd->priv;
+	int plane_num = plane - lcd->planes;
+
+	/* if the crtc is disabled, mark update delayed */
+	if (!(priv->started & (1 << lcd->mixer))) {
+		lcd->delayed |= 1 << plane_num;
+		return;				/* mixer disabled */
+	}
+
+	mutex_lock(&priv->mutex);
+
+	de2_plane_update(priv, lcd, plane_num, state, old_state);
+
+	mutex_unlock(&priv->mutex);
+}
+
+static void de2_drm_plane_disable(struct drm_plane *plane,
+				struct drm_plane_state *old_state)
+{
+	struct drm_crtc *crtc = old_state->crtc;
+	struct lcd *lcd = crtc_to_lcd(crtc);
+	struct priv *priv = lcd->priv;
+	int plane_num = plane - lcd->planes;
+
+	if (!(priv->started & (1 << lcd->mixer)))
+		return;				/* mixer disabled */
+
+	mutex_lock(&priv->mutex);
+
+	de2_plane_disable(lcd->priv, lcd->mixer, plane_num);
+
+	mutex_unlock(&priv->mutex);
+}
+
+static const struct drm_plane_helper_funcs plane_helper_funcs = {
+	.atomic_update = de2_drm_plane_update,
+	.atomic_disable = de2_drm_plane_disable,
+};
+
+static const struct drm_plane_funcs plane_funcs = {
+	.update_plane = drm_atomic_helper_update_plane,
+	.disable_plane = drm_atomic_helper_disable_plane,
+	.destroy = drm_plane_cleanup,
+	.reset = drm_atomic_helper_plane_reset,
+	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
+};
+
+static int de2_one_plane_init(struct drm_device *drm,
+				struct drm_plane *plane,
+				int possible_crtcs,
+				int plane_num)
+{
+	int ret;
+
+	ret = drm_universal_plane_init(drm, plane, possible_crtcs,
+				&plane_funcs,
+				plane_tb[plane_num].formats,
+				plane_tb[plane_num].n_formats,
+				plane_tb[plane_num].type, NULL);
+	if (ret >= 0)
+		drm_plane_helper_add(plane, &plane_helper_funcs);
+
+	return ret;
+}
+
+/* initialize the planes */
+int de2_plane_init(struct drm_device *drm, struct lcd *lcd)
+{
+	int i, n, ret, possible_crtcs = 1 << drm_crtc_index(&lcd->crtc);
+
+	n = ARRAY_SIZE(plane_tb);
+	if (n != DE2_N_PLANES) {
+		dev_err(lcd->dev, "Bug: incorrect number of planes %d != "
+			__stringify(DE2_N_PLANES) "\n", n);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < n; i++) {
+		ret = de2_one_plane_init(drm, &lcd->planes[i],
+				possible_crtcs, i);
+		if (ret < 0) {
+			dev_err(lcd->dev, "plane init failed %d\n", ret);
+			break;
+		}
+	}
+
+	return ret;
+}
-- 
2.10.2

-- 
You received this message because you are subscribed to the Google Groups "linux-sunxi" group.
To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
For more options, visit https://groups.google.com/d/optout.

^ permalink raw reply related	[flat|nested] 79+ messages in thread