[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_fb.h"
#include "exynos_drm_plane.h"
#include "exynos_drm_vidi.h"

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

#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 const enum drm_plane_type vidi_win_types[WINDOWS_NR] = {
	DRM_PLANE_TYPE_PRIMARY,
	DRM_PLANE_TYPE_OVERLAY,
	DRM_PLANE_TYPE_CURSOR,
};

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 drm_plane_state *state = plane->base.state;
	struct vidi_context *ctx = crtc->ctx;
	dma_addr_t addr;

	if (ctx->suspended)
		return;

	addr = exynos_drm_fb_dma_addr(state->fb, 0);
	DRM_DEBUG_KMS("dma_addr = %pad\n", &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 ssize_t 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 ssize_t 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;

		raw_edid = (struct edid *)(unsigned long)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 const 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 const 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 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 const struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = {
	.mode_set = exynos_vidi_mode_set,
	.enable = exynos_vidi_enable,
	.disable = exynos_vidi_disable,
};

static const 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;
	struct exynos_drm_plane_config plane_config = { 0 };
	unsigned int i;
	int pipe, ret;

	vidi_ctx_initialize(ctx, drm_dev);

	plane_config.pixel_formats = formats;
	plane_config.num_pixel_formats = ARRAY_SIZE(formats);

	for (i = 0; i < WINDOWS_NR; i++) {
		plane_config.zpos = i;
		plane_config.type = vidi_win_types[i];

		ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
					1 << ctx->pipe, &plane_config);
		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"
0488f50e	27	#include "exynos_drm_fb.h"
7ee14cdc	28	#include "exynos_drm_plane.h"
e30655d0	29	#include "exynos_drm_vidi.h"
b73d1230 ID	30
	31	/* vidi has totally three virtual windows. */
	32	#define WINDOWS_NR 3
	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
fd2d2fc2 MS	92	static const enum drm_plane_type vidi_win_types[WINDOWS_NR] = {
	93	DRM_PLANE_TYPE_PRIMARY,
	94	DRM_PLANE_TYPE_OVERLAY,
	95	DRM_PLANE_TYPE_CURSOR,
	96	};
	97
93bca243	98	static int vidi_enable_vblank(struct exynos_drm_crtc *crtc)
b73d1230	99	{
93bca243	100	struct vidi_context *ctx = crtc->ctx;
b73d1230	101
b73d1230 ID	102	if (ctx->suspended)
	103	return -EPERM;
	104
	105	if (!test_and_set_bit(0, &ctx->irq_flags))
	106	ctx->vblank_on = true;
	107
291257cf ID	108	ctx->direct_vblank = true;
	109
	110	/*
	111	* in case of page flip request, vidi_finish_pageflip function
	112	* will not be called because direct_vblank is true and then
9cc7610a	113	* that function will be called by crtc_ops->update_plane callback
291257cf ID	114	*/
	115	schedule_work(&ctx->work);
	116
b73d1230 ID	117	return 0;
	118	}
	119
93bca243	120	static void vidi_disable_vblank(struct exynos_drm_crtc *crtc)
b73d1230	121	{
93bca243	122	struct vidi_context *ctx = crtc->ctx;
b73d1230	123
b73d1230 ID	124	if (ctx->suspended)
	125	return;
	126
	127	if (test_and_clear_bit(0, &ctx->irq_flags))
	128	ctx->vblank_on = false;
	129	}
	130
1e1d1393 GP	131	static void vidi_update_plane(struct exynos_drm_crtc *crtc,
1e1d1393 GP	132	struct exynos_drm_plane *plane)
b73d1230	133	{
0488f50e	134	struct drm_plane_state *state = plane->base.state;
93bca243	135	struct vidi_context *ctx = crtc->ctx;
0488f50e	136	dma_addr_t addr;
b73d1230	137
b73d1230 ID	138	if (ctx->suspended)
	139	return;
	140
0488f50e MS	141	addr = exynos_drm_fb_dma_addr(state->fb, 0);
0488f50e MS	142	DRM_DEBUG_KMS("dma_addr = %pad\n", &addr);
b73d1230 ID	143
	144	if (ctx->vblank_on)
	145	schedule_work(&ctx->work);
	146	}
	147
3cecda03	148	static void vidi_enable(struct exynos_drm_crtc *crtc)
af65c804	149	{
3cecda03	150	struct vidi_context *ctx = crtc->ctx;
7ee14cdc	151
3cecda03	152	mutex_lock(&ctx->lock);
af65c804	153
3cecda03	154	ctx->suspended = false;
af65c804	155
3cecda03 GP	156	/* if vblank was enabled status, enable it again. */
	157	if (test_and_clear_bit(0, &ctx->irq_flags))
	158	vidi_enable_vblank(ctx->crtc);
af65c804	159
3cecda03	160	mutex_unlock(&ctx->lock);
af65c804 SP	161	}
af65c804 SP	162
3cecda03	163	static void vidi_disable(struct exynos_drm_crtc *crtc)
af65c804	164	{
93bca243	165	struct vidi_context *ctx = crtc->ctx;
af65c804 SP	166
	167	mutex_lock(&ctx->lock);
	168
3cecda03	169	ctx->suspended = true;
af65c804 SP	170
	171	mutex_unlock(&ctx->lock);
	172	}
	173
93bca243	174	static int vidi_ctx_initialize(struct vidi_context *ctx,
f37cd5e8	175	struct drm_device *drm_dev)
080be03d	176	{
f37cd5e8	177	struct exynos_drm_private *priv = drm_dev->dev_private;
080be03d	178
eb88e422	179	ctx->drm_dev = drm_dev;
8a326edd	180	ctx->pipe = priv->pipe++;
080be03d	181
080be03d SP	182	return 0;
	183	}
	184
f3aaf762	185	static const struct exynos_drm_crtc_ops vidi_crtc_ops = {
3cecda03 GP	186	.enable = vidi_enable,
3cecda03 GP	187	.disable = vidi_disable,
1c6244c3 SP	188	.enable_vblank = vidi_enable_vblank,
1c6244c3 SP	189	.disable_vblank = vidi_disable_vblank,
9cc7610a	190	.update_plane = vidi_update_plane,
b73d1230 ID	191	};
b73d1230 ID	192
b73d1230 ID	193	static void vidi_fake_vblank_handler(struct work_struct *work)
	194	{
	195	struct vidi_context *ctx = container_of(work, struct vidi_context,
	196	work);
822f6dfd	197	int win;
b73d1230	198
080be03d	199	if (ctx->pipe < 0)
b73d1230 ID	200	return;
	201
	202	/* refresh rate is about 50Hz. */
	203	usleep_range(16000, 20000);
	204
291257cf ID	205	mutex_lock(&ctx->lock);
	206
	207	if (ctx->direct_vblank) {
eafd540a	208	drm_crtc_handle_vblank(&ctx->crtc->base);
291257cf ID	209	ctx->direct_vblank = false;
	210	mutex_unlock(&ctx->lock);
	211	return;
	212	}
	213
	214	mutex_unlock(&ctx->lock);
	215
822f6dfd GP	216	for (win = 0 ; win < WINDOWS_NR ; win++) {
	217	struct exynos_drm_plane *plane = &ctx->planes[win];
	218
	219	if (!plane->pending_fb)
	220	continue;
	221
	222	exynos_drm_crtc_finish_update(ctx->crtc, plane);
	223	}
b73d1230 ID	224	}
b73d1230 ID	225
c5f2f0c4	226	static ssize_t vidi_show_connection(struct device *dev,
b73d1230 ID	227	struct device_attribute attr, char buf)
b73d1230 ID	228	{
f01833cd	229	struct vidi_context *ctx = dev_get_drvdata(dev);
b73d1230	230	int rc;
b73d1230 ID	231
	232	mutex_lock(&ctx->lock);
	233
	234	rc = sprintf(buf, "%d\n", ctx->connected);
	235
	236	mutex_unlock(&ctx->lock);
	237
	238	return rc;
	239	}
	240
c5f2f0c4	241	static ssize_t vidi_store_connection(struct device *dev,
b73d1230 ID	242	struct device_attribute *attr,
	243	const char *buf, size_t len)
	244	{
f01833cd	245	struct vidi_context *ctx = dev_get_drvdata(dev);
b73d1230 ID	246	int ret;
b73d1230 ID	247
b73d1230 ID	248	ret = kstrtoint(buf, 0, &ctx->connected);
	249	if (ret)
	250	return ret;
	251
	252	if (ctx->connected > 1)
	253	return -EINVAL;
	254
d07d39df ID	255	/* use fake edid data for test. */
	256	if (!ctx->raw_edid)
	257	ctx->raw_edid = (struct edid *)fake_edid_info;
	258
d7b8478a ID	259	/* if raw_edid isn't same as fake data then it can't be tested. */
	260	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
	261	DRM_DEBUG_KMS("edid data is not fake data.\n");
	262	return -EINVAL;
	263	}
	264
b73d1230 ID	265	DRM_DEBUG_KMS("requested connection.\n");
b73d1230 ID	266
080be03d	267	drm_helper_hpd_irq_event(ctx->drm_dev);
b73d1230 ID	268
	269	return len;
	270	}
	271
	272	static DEVICE_ATTR(connection, 0644, vidi_show_connection,
	273	vidi_store_connection);
	274
	275	int vidi_connection_ioctl(struct drm_device drm_dev, void data,
	276	struct drm_file *file_priv)
	277	{
cf67cc9a	278	struct vidi_context *ctx = dev_get_drvdata(drm_dev->dev);
b73d1230 ID	279	struct drm_exynos_vidi_connection *vidi = data;
b73d1230 ID	280
b73d1230 ID	281	if (!vidi) {
	282	DRM_DEBUG_KMS("user data for vidi is null.\n");
	283	return -EINVAL;
	284	}
	285
b73d1230 ID	286	if (vidi->connection > 1) {
	287	DRM_DEBUG_KMS("connection should be 0 or 1.\n");
	288	return -EINVAL;
	289	}
	290
b73d1230 ID	291	if (ctx->connected == vidi->connection) {
	292	DRM_DEBUG_KMS("same connection request.\n");
	293	return -EINVAL;
	294	}
	295
d3b62dbf	296	if (vidi->connection) {
c5f2f0c4 MS	297	struct edid *raw_edid;
	298
	299	raw_edid = (struct edid *)(unsigned long)vidi->edid;
e7808df1 SWK	300	if (!drm_edid_is_valid(raw_edid)) {
e7808df1 SWK	301	DRM_DEBUG_KMS("edid data is invalid.\n");
d3b62dbf ID	302	return -EINVAL;
d3b62dbf ID	303	}
4ddc773b	304	ctx->raw_edid = drm_edid_duplicate(raw_edid);
d3b62dbf ID	305	if (!ctx->raw_edid) {
	306	DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
	307	return -ENOMEM;
	308	}
d3b62dbf ID	309	} else {
	310	/*
	311	* with connection = 0, free raw_edid
	312	* only if raw edid data isn't same as fake data.
	313	*/
	314	if (ctx->raw_edid && ctx->raw_edid !=
	315	(struct edid *)fake_edid_info) {
	316	kfree(ctx->raw_edid);
	317	ctx->raw_edid = NULL;
	318	}
	319	}
b73d1230 ID	320
b73d1230 ID	321	ctx->connected = vidi->connection;
080be03d	322	drm_helper_hpd_irq_event(ctx->drm_dev);
b73d1230 ID	323
	324	return 0;
	325	}
	326
ce6cb556 SP	327	static enum drm_connector_status vidi_detect(struct drm_connector *connector,
	328	bool force)
	329	{
	330	struct vidi_context *ctx = ctx_from_connector(connector);
	331
	332	/*
	333	* connection request would come from user side
	334	* to do hotplug through specific ioctl.
	335	*/
	336	return ctx->connected ? connector_status_connected :
	337	connector_status_disconnected;
	338	}
	339
	340	static void vidi_connector_destroy(struct drm_connector *connector)
	341	{
	342	}
	343
800ba2b5	344	static const struct drm_connector_funcs vidi_connector_funcs = {
63498e30	345	.dpms = drm_atomic_helper_connector_dpms,
ce6cb556 SP	346	.fill_modes = drm_helper_probe_single_connector_modes,
	347	.detect = vidi_detect,
	348	.destroy = vidi_connector_destroy,
4ea9526b GP	349	.reset = drm_atomic_helper_connector_reset,
	350	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
	351	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
ce6cb556 SP	352	};
	353
	354	static int vidi_get_modes(struct drm_connector *connector)
	355	{
	356	struct vidi_context *ctx = ctx_from_connector(connector);
	357	struct edid *edid;
	358	int edid_len;
	359
	360	/*
	361	* the edid data comes from user side and it would be set
	362	* to ctx->raw_edid through specific ioctl.
	363	*/
	364	if (!ctx->raw_edid) {
	365	DRM_DEBUG_KMS("raw_edid is null.\n");
	366	return -EFAULT;
	367	}
	368
	369	edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
	370	edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
	371	if (!edid) {
	372	DRM_DEBUG_KMS("failed to allocate edid\n");
	373	return -ENOMEM;
	374	}
	375
	376	drm_mode_connector_update_edid_property(connector, edid);
	377
	378	return drm_add_edid_modes(connector, edid);
	379	}
	380
ce6cb556 SP	381	static struct drm_encoder vidi_best_encoder(struct drm_connector connector)
	382	{
	383	struct vidi_context *ctx = ctx_from_connector(connector);
	384
2b8376c8	385	return &ctx->encoder;
ce6cb556 SP	386	}
ce6cb556 SP	387
800ba2b5	388	static const struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
ce6cb556	389	.get_modes = vidi_get_modes,
ce6cb556 SP	390	.best_encoder = vidi_best_encoder,
	391	};
	392
2b8376c8	393	static int vidi_create_connector(struct drm_encoder *encoder)
ce6cb556	394	{
2b8376c8	395	struct vidi_context *ctx = encoder_to_vidi(encoder);
ce6cb556 SP	396	struct drm_connector *connector = &ctx->connector;
	397	int ret;
	398
ce6cb556 SP	399	connector->polled = DRM_CONNECTOR_POLL_HPD;
	400
	401	ret = drm_connector_init(ctx->drm_dev, connector,
	402	&vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
	403	if (ret) {
	404	DRM_ERROR("Failed to initialize connector with drm\n");
	405	return ret;
	406	}
	407
	408	drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
34ea3d38	409	drm_connector_register(connector);
ce6cb556 SP	410	drm_mode_connector_attach_encoder(connector, encoder);
	411
	412	return 0;
	413	}
	414
2b8376c8 GP	415	static void exynos_vidi_mode_set(struct drm_encoder *encoder,
	416	struct drm_display_mode *mode,
	417	struct drm_display_mode *adjusted_mode)
	418	{
	419	}
	420
	421	static void exynos_vidi_enable(struct drm_encoder *encoder)
	422	{
	423	}
	424
	425	static void exynos_vidi_disable(struct drm_encoder *encoder)
	426	{
	427	}
	428
800ba2b5	429	static const struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = {
2b8376c8 GP	430	.mode_set = exynos_vidi_mode_set,
	431	.enable = exynos_vidi_enable,
	432	.disable = exynos_vidi_disable,
	433	};
	434
800ba2b5	435	static const struct drm_encoder_funcs exynos_vidi_encoder_funcs = {
2b8376c8 GP	436	.destroy = drm_encoder_cleanup,
	437	};
	438
1d50aa9c	439	static int vidi_bind(struct device dev, struct device master, void *data)
f37cd5e8	440	{
f01833cd	441	struct vidi_context *ctx = dev_get_drvdata(dev);
1d50aa9c	442	struct drm_device *drm_dev = data;
2b8376c8	443	struct drm_encoder *encoder = &ctx->encoder;
7ee14cdc	444	struct exynos_drm_plane *exynos_plane;
fd2d2fc2 MS	445	struct exynos_drm_plane_config plane_config = { 0 };
fd2d2fc2 MS	446	unsigned int i;
2b8376c8	447	int pipe, ret;
f37cd5e8	448
0f04cf8d JS	449	vidi_ctx_initialize(ctx, drm_dev);
0f04cf8d JS	450
fd2d2fc2 MS	451	plane_config.pixel_formats = formats;
	452	plane_config.num_pixel_formats = ARRAY_SIZE(formats);
	453
	454	for (i = 0; i < WINDOWS_NR; i++) {
	455	plane_config.zpos = i;
	456	plane_config.type = vidi_win_types[i];
	457
40bdfb0a	458	ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
fd2d2fc2	459	1 << ctx->pipe, &plane_config);
7ee14cdc GP	460	if (ret)
	461	return ret;
	462	}
	463
5d3d0995	464	exynos_plane = &ctx->planes[DEFAULT_WIN];
7ee14cdc GP	465	ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
7ee14cdc GP	466	ctx->pipe, EXYNOS_DISPLAY_TYPE_VIDI,
93bca243 GP	467	&vidi_crtc_ops, ctx);
93bca243 GP	468	if (IS_ERR(ctx->crtc)) {
f37cd5e8	469	DRM_ERROR("failed to create crtc.\n");
93bca243	470	return PTR_ERR(ctx->crtc);
f37cd5e8 ID	471	}
f37cd5e8 ID	472
2b8376c8 GP	473	pipe = exynos_drm_crtc_get_pipe_from_type(drm_dev,
	474	EXYNOS_DISPLAY_TYPE_VIDI);
	475	if (pipe < 0)
	476	return pipe;
	477
	478	encoder->possible_crtcs = 1 << pipe;
	479
	480	DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
	481
	482	drm_encoder_init(drm_dev, encoder, &exynos_vidi_encoder_funcs,
13a3d91f	483	DRM_MODE_ENCODER_TMDS, NULL);
2b8376c8 GP	484
2b8376c8 GP	485	drm_encoder_helper_add(encoder, &exynos_vidi_encoder_helper_funcs);
a2986e80	486
2b8376c8	487	ret = vidi_create_connector(encoder);
f37cd5e8	488	if (ret) {
a2986e80	489	DRM_ERROR("failed to create connector ret = %d\n", ret);
2b8376c8	490	drm_encoder_cleanup(encoder);
f37cd5e8 ID	491	return ret;
	492	}
	493
	494	return 0;
	495	}
	496
1d50aa9c ID	497
	498	static void vidi_unbind(struct device dev, struct device master, void *data)
	499	{
	500	}
	501
	502	static const struct component_ops vidi_component_ops = {
	503	.bind = vidi_bind,
	504	.unbind = vidi_unbind,
	505	};
	506
56550d94	507	static int vidi_probe(struct platform_device *pdev)
b73d1230	508	{
b73d1230	509	struct vidi_context *ctx;
b73d1230 ID	510	int ret;
b73d1230 ID	511
f37cd5e8	512	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
b73d1230 ID	513	if (!ctx)
	514	return -ENOMEM;
	515
1d50aa9c ID	516	ctx->pdev = pdev;
1d50aa9c ID	517
b73d1230 ID	518	INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
b73d1230 ID	519
b73d1230 ID	520	mutex_init(&ctx->lock);
b73d1230 ID	521
f01833cd	522	platform_set_drvdata(pdev, ctx);
b73d1230	523
f37cd5e8 ID	524	ret = device_create_file(&pdev->dev, &dev_attr_connection);
f37cd5e8 ID	525	if (ret < 0) {
1d50aa9c	526	DRM_ERROR("failed to create connection sysfs.\n");
86650408	527	return ret;
f37cd5e8	528	}
b73d1230	529
1d50aa9c ID	530	ret = component_add(&pdev->dev, &vidi_component_ops);
	531	if (ret)
	532	goto err_remove_file;
	533
	534	return ret;
	535
	536	err_remove_file:
	537	device_remove_file(&pdev->dev, &dev_attr_connection);
1d50aa9c ID	538
1d50aa9c ID	539	return ret;
b73d1230 ID	540	}
b73d1230 ID	541
56550d94	542	static int vidi_remove(struct platform_device *pdev)
b73d1230	543	{
f01833cd	544	struct vidi_context *ctx = platform_get_drvdata(pdev);
b73d1230	545
d3b62dbf ID	546	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
	547	kfree(ctx->raw_edid);
	548	ctx->raw_edid = NULL;
f37cd5e8 ID	549
f37cd5e8 ID	550	return -EINVAL;
d3b62dbf ID	551	}
d3b62dbf ID	552
1d50aa9c	553	component_del(&pdev->dev, &vidi_component_ops);
1d50aa9c	554
b73d1230 ID	555	return 0;
	556	}
	557
b73d1230 ID	558	struct platform_driver vidi_driver = {
b73d1230 ID	559	.probe = vidi_probe,
56550d94	560	.remove = vidi_remove,
b73d1230 ID	561	.driver = {
	562	.name = "exynos-drm-vidi",
	563	.owner = THIS_MODULE,
b73d1230 ID	564	},
b73d1230 ID	565	};