[deliverable/linux.git] / drivers / gpu / drm / exynos / exynos_drm_vidi.c

/* exynos_drm_vidi.c
 *
 * Copyright (C) 2012 Samsung Electronics Co.Ltd
 * Authors:
 *	Inki Dae <inki.dae@samsung.com>
 *
 * 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/kernel.h>
#include <linux/platform_device.h>
#include <linux/component.h>

#include <drm/exynos_drm.h>

#include <drm/drm_edid.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_atomic_helper.h>

#include "exynos_drm_drv.h"
#include "exynos_drm_crtc.h"
#include "exynos_drm_plane.h"
#include "exynos_drm_vidi.h"

/* vidi has totally three virtual windows. */
#define WINDOWS_NR		3
#define CURSOR_WIN		2

#define ctx_from_connector(c)	container_of(c, struct vidi_context, \
					connector)

struct vidi_context {
	struct drm_encoder		encoder;
	struct platform_device		*pdev;
	struct drm_device		*drm_dev;
	struct exynos_drm_crtc		*crtc;
	struct drm_connector		connector;
	struct exynos_drm_plane		planes[WINDOWS_NR];
	struct edid			*raw_edid;
	unsigned int			clkdiv;
	unsigned long			irq_flags;
	unsigned int			connected;
	bool				vblank_on;
	bool				suspended;
	bool				direct_vblank;
	struct work_struct		work;
	struct mutex			lock;
	int				pipe;
};

static inline struct vidi_context *encoder_to_vidi(struct drm_encoder *e)
{
	return container_of(e, struct vidi_context, encoder);
}

static const char fake_edid_info[] = {
	0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
	0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
	0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
	0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
	0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
	0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
	0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
	0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
	0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
	0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
	0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
	0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
	0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
	0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
	0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
	0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
	0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
	0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x06
};

static const uint32_t formats[] = {
	DRM_FORMAT_XRGB8888,
	DRM_FORMAT_ARGB8888,
	DRM_FORMAT_NV12,
};

static int vidi_enable_vblank(struct exynos_drm_crtc *crtc)
{
	struct vidi_context *ctx = crtc->ctx;

	if (ctx->suspended)
		return -EPERM;

	if (!test_and_set_bit(0, &ctx->irq_flags))
		ctx->vblank_on = true;

	ctx->direct_vblank = true;

	/*
	 * in case of page flip request, vidi_finish_pageflip function
	 * will not be called because direct_vblank is true and then
	 * that function will be called by crtc_ops->update_plane callback
	 */
	schedule_work(&ctx->work);

	return 0;
}

static void vidi_disable_vblank(struct exynos_drm_crtc *crtc)
{
	struct vidi_context *ctx = crtc->ctx;

	if (ctx->suspended)
		return;

	if (test_and_clear_bit(0, &ctx->irq_flags))
		ctx->vblank_on = false;
}

static void vidi_update_plane(struct exynos_drm_crtc *crtc,
			      struct exynos_drm_plane *plane)
{
	struct vidi_context *ctx = crtc->ctx;

	if (ctx->suspended)
		return;

	DRM_DEBUG_KMS("dma_addr = %pad\n", plane->dma_addr);

	if (ctx->vblank_on)
		schedule_work(&ctx->work);
}

static void vidi_enable(struct exynos_drm_crtc *crtc)
{
	struct vidi_context *ctx = crtc->ctx;

	mutex_lock(&ctx->lock);

	ctx->suspended = false;

	/* if vblank was enabled status, enable it again. */
	if (test_and_clear_bit(0, &ctx->irq_flags))
		vidi_enable_vblank(ctx->crtc);

	mutex_unlock(&ctx->lock);
}

static void vidi_disable(struct exynos_drm_crtc *crtc)
{
	struct vidi_context *ctx = crtc->ctx;

	mutex_lock(&ctx->lock);

	ctx->suspended = true;

	mutex_unlock(&ctx->lock);
}

static int vidi_ctx_initialize(struct vidi_context *ctx,
			struct drm_device *drm_dev)
{
	struct exynos_drm_private *priv = drm_dev->dev_private;

	ctx->drm_dev = drm_dev;
	ctx->pipe = priv->pipe++;

	return 0;
}

static const struct exynos_drm_crtc_ops vidi_crtc_ops = {
	.enable = vidi_enable,
	.disable = vidi_disable,
	.enable_vblank = vidi_enable_vblank,
	.disable_vblank = vidi_disable_vblank,
	.update_plane = vidi_update_plane,
};

static void vidi_fake_vblank_handler(struct work_struct *work)
{
	struct vidi_context *ctx = container_of(work, struct vidi_context,
					work);
	int win;

	if (ctx->pipe < 0)
		return;

	/* refresh rate is about 50Hz. */
	usleep_range(16000, 20000);

	mutex_lock(&ctx->lock);

	if (ctx->direct_vblank) {
		drm_crtc_handle_vblank(&ctx->crtc->base);
		ctx->direct_vblank = false;
		mutex_unlock(&ctx->lock);
		return;
	}

	mutex_unlock(&ctx->lock);

	for (win = 0 ; win < WINDOWS_NR ; win++) {
		struct exynos_drm_plane *plane = &ctx->planes[win];

		if (!plane->pending_fb)
			continue;

		exynos_drm_crtc_finish_update(ctx->crtc, plane);
	}
}

static int vidi_show_connection(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct vidi_context *ctx = dev_get_drvdata(dev);
	int rc;

	mutex_lock(&ctx->lock);

	rc = sprintf(buf, "%d\n", ctx->connected);

	mutex_unlock(&ctx->lock);

	return rc;
}

static int vidi_store_connection(struct device *dev,
				struct device_attribute *attr,
				const char *buf, size_t len)
{
	struct vidi_context *ctx = dev_get_drvdata(dev);
	int ret;

	ret = kstrtoint(buf, 0, &ctx->connected);
	if (ret)
		return ret;

	if (ctx->connected > 1)
		return -EINVAL;

	/* use fake edid data for test. */
	if (!ctx->raw_edid)
		ctx->raw_edid = (struct edid *)fake_edid_info;

	/* if raw_edid isn't same as fake data then it can't be tested. */
	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
		DRM_DEBUG_KMS("edid data is not fake data.\n");
		return -EINVAL;
	}

	DRM_DEBUG_KMS("requested connection.\n");

	drm_helper_hpd_irq_event(ctx->drm_dev);

	return len;
}

static DEVICE_ATTR(connection, 0644, vidi_show_connection,
			vidi_store_connection);

int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
				struct drm_file *file_priv)
{
	struct vidi_context *ctx = dev_get_drvdata(drm_dev->dev);
	struct drm_exynos_vidi_connection *vidi = data;

	if (!vidi) {
		DRM_DEBUG_KMS("user data for vidi is null.\n");
		return -EINVAL;
	}

	if (vidi->connection > 1) {
		DRM_DEBUG_KMS("connection should be 0 or 1.\n");
		return -EINVAL;
	}

	if (ctx->connected == vidi->connection) {
		DRM_DEBUG_KMS("same connection request.\n");
		return -EINVAL;
	}

	if (vidi->connection) {
		struct edid *raw_edid  = (struct edid *)(uint32_t)vidi->edid;
		if (!drm_edid_is_valid(raw_edid)) {
			DRM_DEBUG_KMS("edid data is invalid.\n");
			return -EINVAL;
		}
		ctx->raw_edid = drm_edid_duplicate(raw_edid);
		if (!ctx->raw_edid) {
			DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
			return -ENOMEM;
		}
	} else {
		/*
		 * with connection = 0, free raw_edid
		 * only if raw edid data isn't same as fake data.
		 */
		if (ctx->raw_edid && ctx->raw_edid !=
				(struct edid *)fake_edid_info) {
			kfree(ctx->raw_edid);
			ctx->raw_edid = NULL;
		}
	}

	ctx->connected = vidi->connection;
	drm_helper_hpd_irq_event(ctx->drm_dev);

	return 0;
}

static enum drm_connector_status vidi_detect(struct drm_connector *connector,
			bool force)
{
	struct vidi_context *ctx = ctx_from_connector(connector);

	/*
	 * connection request would come from user side
	 * to do hotplug through specific ioctl.
	 */
	return ctx->connected ? connector_status_connected :
			connector_status_disconnected;
}

static void vidi_connector_destroy(struct drm_connector *connector)
{
}

static struct drm_connector_funcs vidi_connector_funcs = {
	.dpms = drm_atomic_helper_connector_dpms,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.detect = vidi_detect,
	.destroy = vidi_connector_destroy,
	.reset = drm_atomic_helper_connector_reset,
	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};

static int vidi_get_modes(struct drm_connector *connector)
{
	struct vidi_context *ctx = ctx_from_connector(connector);
	struct edid *edid;
	int edid_len;

	/*
	 * the edid data comes from user side and it would be set
	 * to ctx->raw_edid through specific ioctl.
	 */
	if (!ctx->raw_edid) {
		DRM_DEBUG_KMS("raw_edid is null.\n");
		return -EFAULT;
	}

	edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
	edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
	if (!edid) {
		DRM_DEBUG_KMS("failed to allocate edid\n");
		return -ENOMEM;
	}

	drm_mode_connector_update_edid_property(connector, edid);

	return drm_add_edid_modes(connector, edid);
}

static struct drm_encoder *vidi_best_encoder(struct drm_connector *connector)
{
	struct vidi_context *ctx = ctx_from_connector(connector);

	return &ctx->encoder;
}

static struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
	.get_modes = vidi_get_modes,
	.best_encoder = vidi_best_encoder,
};

static int vidi_create_connector(struct drm_encoder *encoder)
{
	struct vidi_context *ctx = encoder_to_vidi(encoder);
	struct drm_connector *connector = &ctx->connector;
	int ret;

	connector->polled = DRM_CONNECTOR_POLL_HPD;

	ret = drm_connector_init(ctx->drm_dev, connector,
			&vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
	if (ret) {
		DRM_ERROR("Failed to initialize connector with drm\n");
		return ret;
	}

	drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
	drm_connector_register(connector);
	drm_mode_connector_attach_encoder(connector, encoder);

	return 0;
}

static bool exynos_vidi_mode_fixup(struct drm_encoder *encoder,
				 const struct drm_display_mode *mode,
				 struct drm_display_mode *adjusted_mode)
{
	return true;
}

static void exynos_vidi_mode_set(struct drm_encoder *encoder,
			       struct drm_display_mode *mode,
			       struct drm_display_mode *adjusted_mode)
{
}

static void exynos_vidi_enable(struct drm_encoder *encoder)
{
}

static void exynos_vidi_disable(struct drm_encoder *encoder)
{
}

static struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = {
	.mode_fixup = exynos_vidi_mode_fixup,
	.mode_set = exynos_vidi_mode_set,
	.enable = exynos_vidi_enable,
	.disable = exynos_vidi_disable,
};

static struct drm_encoder_funcs exynos_vidi_encoder_funcs = {
	.destroy = drm_encoder_cleanup,
};

static int vidi_bind(struct device *dev, struct device *master, void *data)
{
	struct vidi_context *ctx = dev_get_drvdata(dev);
	struct drm_device *drm_dev = data;
	struct drm_encoder *encoder = &ctx->encoder;
	struct exynos_drm_plane *exynos_plane;
	enum drm_plane_type type;
	unsigned int zpos;
	int pipe, ret;

	vidi_ctx_initialize(ctx, drm_dev);

	for (zpos = 0; zpos < WINDOWS_NR; zpos++) {
		type = exynos_plane_get_type(zpos, CURSOR_WIN);
		ret = exynos_plane_init(drm_dev, &ctx->planes[zpos],
					1 << ctx->pipe, type, formats,
					ARRAY_SIZE(formats), zpos);
		if (ret)
			return ret;
	}

	exynos_plane = &ctx->planes[DEFAULT_WIN];
	ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
					   ctx->pipe, EXYNOS_DISPLAY_TYPE_VIDI,
					   &vidi_crtc_ops, ctx);
	if (IS_ERR(ctx->crtc)) {
		DRM_ERROR("failed to create crtc.\n");
		return PTR_ERR(ctx->crtc);
	}

	pipe = exynos_drm_crtc_get_pipe_from_type(drm_dev,
						  EXYNOS_DISPLAY_TYPE_VIDI);
	if (pipe < 0)
		return pipe;

	encoder->possible_crtcs = 1 << pipe;

	DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);

	drm_encoder_init(drm_dev, encoder, &exynos_vidi_encoder_funcs,
			 DRM_MODE_ENCODER_TMDS, NULL);

	drm_encoder_helper_add(encoder, &exynos_vidi_encoder_helper_funcs);

	ret = vidi_create_connector(encoder);
	if (ret) {
		DRM_ERROR("failed to create connector ret = %d\n", ret);
		drm_encoder_cleanup(encoder);
		return ret;
	}

	return 0;
}


static void vidi_unbind(struct device *dev, struct device *master, void *data)
{
}

static const struct component_ops vidi_component_ops = {
	.bind	= vidi_bind,
	.unbind = vidi_unbind,
};

static int vidi_probe(struct platform_device *pdev)
{
	struct vidi_context *ctx;
	int ret;

	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
	if (!ctx)
		return -ENOMEM;

	ctx->pdev = pdev;

	INIT_WORK(&ctx->work, vidi_fake_vblank_handler);

	mutex_init(&ctx->lock);

	platform_set_drvdata(pdev, ctx);

	ret = device_create_file(&pdev->dev, &dev_attr_connection);
	if (ret < 0) {
		DRM_ERROR("failed to create connection sysfs.\n");
		return ret;
	}

	ret = component_add(&pdev->dev, &vidi_component_ops);
	if (ret)
		goto err_remove_file;

	return ret;

err_remove_file:
	device_remove_file(&pdev->dev, &dev_attr_connection);

	return ret;
}

static int vidi_remove(struct platform_device *pdev)
{
	struct vidi_context *ctx = platform_get_drvdata(pdev);

	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
		kfree(ctx->raw_edid);
		ctx->raw_edid = NULL;

		return -EINVAL;
	}

	component_del(&pdev->dev, &vidi_component_ops);

	return 0;
}

struct platform_driver vidi_driver = {
	.probe		= vidi_probe,
	.remove		= vidi_remove,
	.driver		= {
		.name	= "exynos-drm-vidi",
		.owner	= THIS_MODULE,
	},
};
Commit	Line	Data
b73d1230 ID	1	/* exynos_drm_vidi.c
	2	*
	3	* Copyright (C) 2012 Samsung Electronics Co.Ltd
	4	* Authors:
	5	* Inki Dae <inki.dae@samsung.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; either version 2 of the License, or (at your
	10	* option) any later version.
	11	*
	12	*/
760285e7	13	#include <drm/drmP.h>
b73d1230 ID	14
b73d1230 ID	15	#include <linux/kernel.h>
b73d1230	16	#include <linux/platform_device.h>
1d50aa9c	17	#include <linux/component.h>
b73d1230 ID	18
	19	#include <drm/exynos_drm.h>
	20
760285e7 DH	21	#include <drm/drm_edid.h>
760285e7 DH	22	#include <drm/drm_crtc_helper.h>
4ea9526b	23	#include <drm/drm_atomic_helper.h>
b73d1230 ID	24
	25	#include "exynos_drm_drv.h"
	26	#include "exynos_drm_crtc.h"
7ee14cdc	27	#include "exynos_drm_plane.h"
e30655d0	28	#include "exynos_drm_vidi.h"
b73d1230 ID	29
	30	/* vidi has totally three virtual windows. */
	31	#define WINDOWS_NR 3
323db0ed	32	#define CURSOR_WIN 2
b73d1230	33
ce6cb556 SP	34	#define ctx_from_connector(c) container_of(c, struct vidi_context, \
ce6cb556 SP	35	connector)
b73d1230	36
b73d1230	37	struct vidi_context {
2b8376c8	38	struct drm_encoder encoder;
1d50aa9c	39	struct platform_device *pdev;
080be03d	40	struct drm_device *drm_dev;
93bca243	41	struct exynos_drm_crtc *crtc;
ce6cb556	42	struct drm_connector connector;
7ee14cdc	43	struct exynos_drm_plane planes[WINDOWS_NR];
b73d1230 ID	44	struct edid *raw_edid;
b73d1230 ID	45	unsigned int clkdiv;
b73d1230 ID	46	unsigned long irq_flags;
	47	unsigned int connected;
	48	bool vblank_on;
	49	bool suspended;
291257cf	50	bool direct_vblank;
b73d1230 ID	51	struct work_struct work;
b73d1230 ID	52	struct mutex lock;
080be03d	53	int pipe;
b73d1230 ID	54	};
b73d1230 ID	55
2b8376c8	56	static inline struct vidi_context encoder_to_vidi(struct drm_encoder e)
2f26bd72	57	{
cf67cc9a	58	return container_of(e, struct vidi_context, encoder);
2f26bd72 AH	59	}
2f26bd72 AH	60
b73d1230 ID	61	static const char fake_edid_info[] = {
	62	0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
	63	0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
	64	0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
	65	0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
	66	0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
	67	0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
	68	0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
	69	0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
	70	0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
	71	0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
	72	0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
	73	0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
	74	0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
	75	0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
	76	0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
	77	0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
	78	0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
	79	0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
	80	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	81	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	82	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	83	0x00, 0x00, 0x00, 0x06
	84	};
	85
fbbb1e1a MS	86	static const uint32_t formats[] = {
	87	DRM_FORMAT_XRGB8888,
	88	DRM_FORMAT_ARGB8888,
	89	DRM_FORMAT_NV12,
	90	};
	91
93bca243	92	static int vidi_enable_vblank(struct exynos_drm_crtc *crtc)
b73d1230	93	{
93bca243	94	struct vidi_context *ctx = crtc->ctx;
b73d1230	95
b73d1230 ID	96	if (ctx->suspended)
	97	return -EPERM;
	98
	99	if (!test_and_set_bit(0, &ctx->irq_flags))
	100	ctx->vblank_on = true;
	101
291257cf ID	102	ctx->direct_vblank = true;
	103
	104	/*
	105	* in case of page flip request, vidi_finish_pageflip function
	106	* will not be called because direct_vblank is true and then
9cc7610a	107	* that function will be called by crtc_ops->update_plane callback
291257cf ID	108	*/
	109	schedule_work(&ctx->work);
	110
b73d1230 ID	111	return 0;
	112	}
	113
93bca243	114	static void vidi_disable_vblank(struct exynos_drm_crtc *crtc)
b73d1230	115	{
93bca243	116	struct vidi_context *ctx = crtc->ctx;
b73d1230	117
b73d1230 ID	118	if (ctx->suspended)
	119	return;
	120
	121	if (test_and_clear_bit(0, &ctx->irq_flags))
	122	ctx->vblank_on = false;
	123	}
	124
1e1d1393 GP	125	static void vidi_update_plane(struct exynos_drm_crtc *crtc,
1e1d1393 GP	126	struct exynos_drm_plane *plane)
b73d1230	127	{
93bca243	128	struct vidi_context *ctx = crtc->ctx;
b73d1230	129
b73d1230 ID	130	if (ctx->suspended)
	131	return;
	132
7ee14cdc	133	DRM_DEBUG_KMS("dma_addr = %pad\n", plane->dma_addr);
b73d1230 ID	134
	135	if (ctx->vblank_on)
	136	schedule_work(&ctx->work);
	137	}
	138
3cecda03	139	static void vidi_enable(struct exynos_drm_crtc *crtc)
af65c804	140	{
3cecda03	141	struct vidi_context *ctx = crtc->ctx;
7ee14cdc	142
3cecda03	143	mutex_lock(&ctx->lock);
af65c804	144
3cecda03	145	ctx->suspended = false;
af65c804	146
3cecda03 GP	147	/* if vblank was enabled status, enable it again. */
	148	if (test_and_clear_bit(0, &ctx->irq_flags))
	149	vidi_enable_vblank(ctx->crtc);
af65c804	150
3cecda03	151	mutex_unlock(&ctx->lock);
af65c804 SP	152	}
af65c804 SP	153
3cecda03	154	static void vidi_disable(struct exynos_drm_crtc *crtc)
af65c804	155	{
93bca243	156	struct vidi_context *ctx = crtc->ctx;
af65c804 SP	157
	158	mutex_lock(&ctx->lock);
	159
3cecda03	160	ctx->suspended = true;
af65c804 SP	161
	162	mutex_unlock(&ctx->lock);
	163	}
	164
93bca243	165	static int vidi_ctx_initialize(struct vidi_context *ctx,
f37cd5e8	166	struct drm_device *drm_dev)
080be03d	167	{
f37cd5e8	168	struct exynos_drm_private *priv = drm_dev->dev_private;
080be03d	169
eb88e422	170	ctx->drm_dev = drm_dev;
8a326edd	171	ctx->pipe = priv->pipe++;
080be03d	172
080be03d SP	173	return 0;
	174	}
	175
f3aaf762	176	static const struct exynos_drm_crtc_ops vidi_crtc_ops = {
3cecda03 GP	177	.enable = vidi_enable,
3cecda03 GP	178	.disable = vidi_disable,
1c6244c3 SP	179	.enable_vblank = vidi_enable_vblank,
1c6244c3 SP	180	.disable_vblank = vidi_disable_vblank,
9cc7610a	181	.update_plane = vidi_update_plane,
b73d1230 ID	182	};
b73d1230 ID	183
b73d1230 ID	184	static void vidi_fake_vblank_handler(struct work_struct *work)
	185	{
	186	struct vidi_context *ctx = container_of(work, struct vidi_context,
	187	work);
822f6dfd	188	int win;
b73d1230	189
080be03d	190	if (ctx->pipe < 0)
b73d1230 ID	191	return;
	192
	193	/* refresh rate is about 50Hz. */
	194	usleep_range(16000, 20000);
	195
291257cf ID	196	mutex_lock(&ctx->lock);
	197
	198	if (ctx->direct_vblank) {
eafd540a	199	drm_crtc_handle_vblank(&ctx->crtc->base);
291257cf ID	200	ctx->direct_vblank = false;
	201	mutex_unlock(&ctx->lock);
	202	return;
	203	}
	204
	205	mutex_unlock(&ctx->lock);
	206
822f6dfd GP	207	for (win = 0 ; win < WINDOWS_NR ; win++) {
	208	struct exynos_drm_plane *plane = &ctx->planes[win];
	209
	210	if (!plane->pending_fb)
	211	continue;
	212
	213	exynos_drm_crtc_finish_update(ctx->crtc, plane);
	214	}
b73d1230 ID	215	}
b73d1230 ID	216
b73d1230 ID	217	static int vidi_show_connection(struct device *dev,
	218	struct device_attribute attr, char buf)
	219	{
f01833cd	220	struct vidi_context *ctx = dev_get_drvdata(dev);
b73d1230	221	int rc;
b73d1230 ID	222
	223	mutex_lock(&ctx->lock);
	224
	225	rc = sprintf(buf, "%d\n", ctx->connected);
	226
	227	mutex_unlock(&ctx->lock);
	228
	229	return rc;
	230	}
	231
	232	static int vidi_store_connection(struct device *dev,
	233	struct device_attribute *attr,
	234	const char *buf, size_t len)
	235	{
f01833cd	236	struct vidi_context *ctx = dev_get_drvdata(dev);
b73d1230 ID	237	int ret;
b73d1230 ID	238
b73d1230 ID	239	ret = kstrtoint(buf, 0, &ctx->connected);
	240	if (ret)
	241	return ret;
	242
	243	if (ctx->connected > 1)
	244	return -EINVAL;
	245
d07d39df ID	246	/* use fake edid data for test. */
	247	if (!ctx->raw_edid)
	248	ctx->raw_edid = (struct edid *)fake_edid_info;
	249
d7b8478a ID	250	/* if raw_edid isn't same as fake data then it can't be tested. */
	251	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
	252	DRM_DEBUG_KMS("edid data is not fake data.\n");
	253	return -EINVAL;
	254	}
	255
b73d1230 ID	256	DRM_DEBUG_KMS("requested connection.\n");
b73d1230 ID	257
080be03d	258	drm_helper_hpd_irq_event(ctx->drm_dev);
b73d1230 ID	259
	260	return len;
	261	}
	262
	263	static DEVICE_ATTR(connection, 0644, vidi_show_connection,
	264	vidi_store_connection);
	265
	266	int vidi_connection_ioctl(struct drm_device drm_dev, void data,
	267	struct drm_file *file_priv)
	268	{
cf67cc9a	269	struct vidi_context *ctx = dev_get_drvdata(drm_dev->dev);
b73d1230 ID	270	struct drm_exynos_vidi_connection *vidi = data;
b73d1230 ID	271
b73d1230 ID	272	if (!vidi) {
	273	DRM_DEBUG_KMS("user data for vidi is null.\n");
	274	return -EINVAL;
	275	}
	276
b73d1230 ID	277	if (vidi->connection > 1) {
	278	DRM_DEBUG_KMS("connection should be 0 or 1.\n");
	279	return -EINVAL;
	280	}
	281
b73d1230 ID	282	if (ctx->connected == vidi->connection) {
	283	DRM_DEBUG_KMS("same connection request.\n");
	284	return -EINVAL;
	285	}
	286
d3b62dbf	287	if (vidi->connection) {
e7808df1 SWK	288	struct edid raw_edid = (struct edid )(uint32_t)vidi->edid;
	289	if (!drm_edid_is_valid(raw_edid)) {
	290	DRM_DEBUG_KMS("edid data is invalid.\n");
d3b62dbf ID	291	return -EINVAL;
d3b62dbf ID	292	}
4ddc773b	293	ctx->raw_edid = drm_edid_duplicate(raw_edid);
d3b62dbf ID	294	if (!ctx->raw_edid) {
	295	DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
	296	return -ENOMEM;
	297	}
d3b62dbf ID	298	} else {
	299	/*
	300	* with connection = 0, free raw_edid
	301	* only if raw edid data isn't same as fake data.
	302	*/
	303	if (ctx->raw_edid && ctx->raw_edid !=
	304	(struct edid *)fake_edid_info) {
	305	kfree(ctx->raw_edid);
	306	ctx->raw_edid = NULL;
	307	}
	308	}
b73d1230 ID	309
b73d1230 ID	310	ctx->connected = vidi->connection;
080be03d	311	drm_helper_hpd_irq_event(ctx->drm_dev);
b73d1230 ID	312
	313	return 0;
	314	}
	315
ce6cb556 SP	316	static enum drm_connector_status vidi_detect(struct drm_connector *connector,
	317	bool force)
	318	{
	319	struct vidi_context *ctx = ctx_from_connector(connector);
	320
	321	/*
	322	* connection request would come from user side
	323	* to do hotplug through specific ioctl.
	324	*/
	325	return ctx->connected ? connector_status_connected :
	326	connector_status_disconnected;
	327	}
	328
	329	static void vidi_connector_destroy(struct drm_connector *connector)
	330	{
	331	}
	332
	333	static struct drm_connector_funcs vidi_connector_funcs = {
63498e30	334	.dpms = drm_atomic_helper_connector_dpms,
ce6cb556 SP	335	.fill_modes = drm_helper_probe_single_connector_modes,
	336	.detect = vidi_detect,
	337	.destroy = vidi_connector_destroy,
4ea9526b GP	338	.reset = drm_atomic_helper_connector_reset,
	339	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
	340	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
ce6cb556 SP	341	};
	342
	343	static int vidi_get_modes(struct drm_connector *connector)
	344	{
	345	struct vidi_context *ctx = ctx_from_connector(connector);
	346	struct edid *edid;
	347	int edid_len;
	348
	349	/*
	350	* the edid data comes from user side and it would be set
	351	* to ctx->raw_edid through specific ioctl.
	352	*/
	353	if (!ctx->raw_edid) {
	354	DRM_DEBUG_KMS("raw_edid is null.\n");
	355	return -EFAULT;
	356	}
	357
	358	edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
	359	edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
	360	if (!edid) {
	361	DRM_DEBUG_KMS("failed to allocate edid\n");
	362	return -ENOMEM;
	363	}
	364
	365	drm_mode_connector_update_edid_property(connector, edid);
	366
	367	return drm_add_edid_modes(connector, edid);
	368	}
	369
ce6cb556 SP	370	static struct drm_encoder vidi_best_encoder(struct drm_connector connector)
	371	{
	372	struct vidi_context *ctx = ctx_from_connector(connector);
	373
2b8376c8	374	return &ctx->encoder;
ce6cb556 SP	375	}
	376
	377	static struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
	378	.get_modes = vidi_get_modes,
ce6cb556 SP	379	.best_encoder = vidi_best_encoder,
	380	};
	381
2b8376c8	382	static int vidi_create_connector(struct drm_encoder *encoder)
ce6cb556	383	{
2b8376c8	384	struct vidi_context *ctx = encoder_to_vidi(encoder);
ce6cb556 SP	385	struct drm_connector *connector = &ctx->connector;
	386	int ret;
	387
ce6cb556 SP	388	connector->polled = DRM_CONNECTOR_POLL_HPD;
	389
	390	ret = drm_connector_init(ctx->drm_dev, connector,
	391	&vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
	392	if (ret) {
	393	DRM_ERROR("Failed to initialize connector with drm\n");
	394	return ret;
	395	}
	396
	397	drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
34ea3d38	398	drm_connector_register(connector);
ce6cb556 SP	399	drm_mode_connector_attach_encoder(connector, encoder);
	400
	401	return 0;
	402	}
	403
2b8376c8 GP	404	static bool exynos_vidi_mode_fixup(struct drm_encoder *encoder,
	405	const struct drm_display_mode *mode,
	406	struct drm_display_mode *adjusted_mode)
	407	{
	408	return true;
	409	}
	410
	411	static void exynos_vidi_mode_set(struct drm_encoder *encoder,
	412	struct drm_display_mode *mode,
	413	struct drm_display_mode *adjusted_mode)
	414	{
	415	}
	416
	417	static void exynos_vidi_enable(struct drm_encoder *encoder)
	418	{
	419	}
	420
	421	static void exynos_vidi_disable(struct drm_encoder *encoder)
	422	{
	423	}
	424
	425	static struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = {
	426	.mode_fixup = exynos_vidi_mode_fixup,
	427	.mode_set = exynos_vidi_mode_set,
	428	.enable = exynos_vidi_enable,
	429	.disable = exynos_vidi_disable,
	430	};
	431
	432	static struct drm_encoder_funcs exynos_vidi_encoder_funcs = {
	433	.destroy = drm_encoder_cleanup,
	434	};
	435
1d50aa9c	436	static int vidi_bind(struct device dev, struct device master, void *data)
f37cd5e8	437	{
f01833cd	438	struct vidi_context *ctx = dev_get_drvdata(dev);
1d50aa9c	439	struct drm_device *drm_dev = data;
2b8376c8	440	struct drm_encoder *encoder = &ctx->encoder;
7ee14cdc GP	441	struct exynos_drm_plane *exynos_plane;
7ee14cdc GP	442	enum drm_plane_type type;
6e2a3b66	443	unsigned int zpos;
2b8376c8	444	int pipe, ret;
f37cd5e8	445
0f04cf8d JS	446	vidi_ctx_initialize(ctx, drm_dev);
0f04cf8d JS	447
7ee14cdc	448	for (zpos = 0; zpos < WINDOWS_NR; zpos++) {
323db0ed	449	type = exynos_plane_get_type(zpos, CURSOR_WIN);
7ee14cdc	450	ret = exynos_plane_init(drm_dev, &ctx->planes[zpos],
fbbb1e1a MS	451	1 << ctx->pipe, type, formats,
fbbb1e1a MS	452	ARRAY_SIZE(formats), zpos);
7ee14cdc GP	453	if (ret)
	454	return ret;
	455	}
	456
5d3d0995	457	exynos_plane = &ctx->planes[DEFAULT_WIN];
7ee14cdc GP	458	ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
7ee14cdc GP	459	ctx->pipe, EXYNOS_DISPLAY_TYPE_VIDI,
93bca243 GP	460	&vidi_crtc_ops, ctx);
93bca243 GP	461	if (IS_ERR(ctx->crtc)) {
f37cd5e8	462	DRM_ERROR("failed to create crtc.\n");
93bca243	463	return PTR_ERR(ctx->crtc);
f37cd5e8 ID	464	}
f37cd5e8 ID	465
2b8376c8 GP	466	pipe = exynos_drm_crtc_get_pipe_from_type(drm_dev,
	467	EXYNOS_DISPLAY_TYPE_VIDI);
	468	if (pipe < 0)
	469	return pipe;
	470
	471	encoder->possible_crtcs = 1 << pipe;
	472
	473	DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
	474
	475	drm_encoder_init(drm_dev, encoder, &exynos_vidi_encoder_funcs,
13a3d91f	476	DRM_MODE_ENCODER_TMDS, NULL);
2b8376c8 GP	477
2b8376c8 GP	478	drm_encoder_helper_add(encoder, &exynos_vidi_encoder_helper_funcs);
a2986e80	479
2b8376c8	480	ret = vidi_create_connector(encoder);
f37cd5e8	481	if (ret) {
a2986e80	482	DRM_ERROR("failed to create connector ret = %d\n", ret);
2b8376c8	483	drm_encoder_cleanup(encoder);
f37cd5e8 ID	484	return ret;
	485	}
	486
	487	return 0;
	488	}
	489
1d50aa9c ID	490
	491	static void vidi_unbind(struct device dev, struct device master, void *data)
	492	{
	493	}
	494
	495	static const struct component_ops vidi_component_ops = {
	496	.bind = vidi_bind,
	497	.unbind = vidi_unbind,
	498	};
	499
56550d94	500	static int vidi_probe(struct platform_device *pdev)
b73d1230	501	{
b73d1230	502	struct vidi_context *ctx;
b73d1230 ID	503	int ret;
b73d1230 ID	504
f37cd5e8	505	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
b73d1230 ID	506	if (!ctx)
	507	return -ENOMEM;
	508
1d50aa9c ID	509	ctx->pdev = pdev;
1d50aa9c ID	510
b73d1230 ID	511	INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
b73d1230 ID	512
b73d1230 ID	513	mutex_init(&ctx->lock);
b73d1230 ID	514
f01833cd	515	platform_set_drvdata(pdev, ctx);
b73d1230	516
f37cd5e8 ID	517	ret = device_create_file(&pdev->dev, &dev_attr_connection);
f37cd5e8 ID	518	if (ret < 0) {
1d50aa9c	519	DRM_ERROR("failed to create connection sysfs.\n");
86650408	520	return ret;
f37cd5e8	521	}
b73d1230	522
1d50aa9c ID	523	ret = component_add(&pdev->dev, &vidi_component_ops);
	524	if (ret)
	525	goto err_remove_file;
	526
	527	return ret;
	528
	529	err_remove_file:
	530	device_remove_file(&pdev->dev, &dev_attr_connection);
1d50aa9c ID	531
1d50aa9c ID	532	return ret;
b73d1230 ID	533	}
b73d1230 ID	534
56550d94	535	static int vidi_remove(struct platform_device *pdev)
b73d1230	536	{
f01833cd	537	struct vidi_context *ctx = platform_get_drvdata(pdev);
b73d1230	538
d3b62dbf ID	539	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
	540	kfree(ctx->raw_edid);
	541	ctx->raw_edid = NULL;
f37cd5e8 ID	542
f37cd5e8 ID	543	return -EINVAL;
d3b62dbf ID	544	}
d3b62dbf ID	545
1d50aa9c	546	component_del(&pdev->dev, &vidi_component_ops);
1d50aa9c	547
b73d1230 ID	548	return 0;
	549	}
	550
b73d1230 ID	551	struct platform_driver vidi_driver = {
b73d1230 ID	552	.probe = vidi_probe,
56550d94	553	.remove = vidi_remove,
b73d1230 ID	554	.driver = {
	555	.name = "exynos-drm-vidi",
	556	.owner = THIS_MODULE,
b73d1230 ID	557	},
b73d1230 ID	558	};