[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 <drm/exynos_drm.h>

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

#include "exynos_drm_drv.h"
#include "exynos_drm_crtc.h"
#include "exynos_drm_encoder.h"

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

#define get_vidi_context(dev)	platform_get_drvdata(to_platform_device(dev))

struct vidi_win_data {
	unsigned int		offset_x;
	unsigned int		offset_y;
	unsigned int		ovl_width;
	unsigned int		ovl_height;
	unsigned int		fb_width;
	unsigned int		fb_height;
	unsigned int		bpp;
	dma_addr_t		dma_addr;
	unsigned int		buf_offsize;
	unsigned int		line_size;	/* bytes */
	bool			enabled;
};

struct vidi_context {
	struct exynos_drm_subdrv	subdrv;
	struct drm_crtc			*crtc;
	struct vidi_win_data		win_data[WINDOWS_NR];
	struct edid			*raw_edid;
	unsigned int			clkdiv;
	unsigned int			default_win;
	unsigned long			irq_flags;
	unsigned int			connected;
	bool				vblank_on;
	bool				suspended;
	bool				direct_vblank;
	struct work_struct		work;
	struct mutex			lock;
};

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 bool vidi_display_is_connected(struct device *dev)
{
	struct vidi_context *ctx = get_vidi_context(dev);

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

static struct edid *vidi_get_edid(struct device *dev,
			struct drm_connector *connector)
{
	struct vidi_context *ctx = get_vidi_context(dev);
	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 ERR_PTR(-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 ERR_PTR(-ENOMEM);
	}

	return edid;
}

static void *vidi_get_panel(struct device *dev)
{
	/* TODO. */

	return NULL;
}

static int vidi_check_mode(struct device *dev, struct drm_display_mode *mode)
{
	/* TODO. */

	return 0;
}

static int vidi_display_power_on(struct device *dev, int mode)
{
	/* TODO */

	return 0;
}

static struct exynos_drm_display_ops vidi_display_ops = {
	.type = EXYNOS_DISPLAY_TYPE_VIDI,
	.is_connected = vidi_display_is_connected,
	.get_edid = vidi_get_edid,
	.get_panel = vidi_get_panel,
	.check_mode = vidi_check_mode,
	.power_on = vidi_display_power_on,
};

static void vidi_dpms(struct device *subdrv_dev, int mode)
{
	struct vidi_context *ctx = get_vidi_context(subdrv_dev);

	DRM_DEBUG_KMS("%d\n", mode);

	mutex_lock(&ctx->lock);

	switch (mode) {
	case DRM_MODE_DPMS_ON:
		/* TODO. */
		break;
	case DRM_MODE_DPMS_STANDBY:
	case DRM_MODE_DPMS_SUSPEND:
	case DRM_MODE_DPMS_OFF:
		/* TODO. */
		break;
	default:
		DRM_DEBUG_KMS("unspecified mode %d\n", mode);
		break;
	}

	mutex_unlock(&ctx->lock);
}

static void vidi_apply(struct device *subdrv_dev)
{
	struct vidi_context *ctx = get_vidi_context(subdrv_dev);
	struct exynos_drm_manager *mgr = ctx->subdrv.manager;
	struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
	struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops;
	struct vidi_win_data *win_data;
	int i;

	for (i = 0; i < WINDOWS_NR; i++) {
		win_data = &ctx->win_data[i];
		if (win_data->enabled && (ovl_ops && ovl_ops->commit))
			ovl_ops->commit(subdrv_dev, i);
	}

	if (mgr_ops && mgr_ops->commit)
		mgr_ops->commit(subdrv_dev);
}

static void vidi_commit(struct device *dev)
{
	struct vidi_context *ctx = get_vidi_context(dev);

	if (ctx->suspended)
		return;
}

static int vidi_enable_vblank(struct device *dev)
{
	struct vidi_context *ctx = get_vidi_context(dev);

	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 overlay_ops->commit callback
	 */
	schedule_work(&ctx->work);

	return 0;
}

static void vidi_disable_vblank(struct device *dev)
{
	struct vidi_context *ctx = get_vidi_context(dev);

	if (ctx->suspended)
		return;

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

static struct exynos_drm_manager_ops vidi_manager_ops = {
	.dpms = vidi_dpms,
	.apply = vidi_apply,
	.commit = vidi_commit,
	.enable_vblank = vidi_enable_vblank,
	.disable_vblank = vidi_disable_vblank,
};

static void vidi_win_mode_set(struct device *dev,
			      struct exynos_drm_overlay *overlay)
{
	struct vidi_context *ctx = get_vidi_context(dev);
	struct vidi_win_data *win_data;
	int win;
	unsigned long offset;

	if (!overlay) {
		dev_err(dev, "overlay is NULL\n");
		return;
	}

	win = overlay->zpos;
	if (win == DEFAULT_ZPOS)
		win = ctx->default_win;

	if (win < 0 || win >= WINDOWS_NR)
		return;

	offset = overlay->fb_x * (overlay->bpp >> 3);
	offset += overlay->fb_y * overlay->pitch;

	DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);

	win_data = &ctx->win_data[win];

	win_data->offset_x = overlay->crtc_x;
	win_data->offset_y = overlay->crtc_y;
	win_data->ovl_width = overlay->crtc_width;
	win_data->ovl_height = overlay->crtc_height;
	win_data->fb_width = overlay->fb_width;
	win_data->fb_height = overlay->fb_height;
	win_data->dma_addr = overlay->dma_addr[0] + offset;
	win_data->bpp = overlay->bpp;
	win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
				(overlay->bpp >> 3);
	win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);

	/*
	 * some parts of win_data should be transferred to user side
	 * through specific ioctl.
	 */

	DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
			win_data->offset_x, win_data->offset_y);
	DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
			win_data->ovl_width, win_data->ovl_height);
	DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
	DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
			overlay->fb_width, overlay->crtc_width);
}

static void vidi_win_commit(struct device *dev, int zpos)
{
	struct vidi_context *ctx = get_vidi_context(dev);
	struct vidi_win_data *win_data;
	int win = zpos;

	if (ctx->suspended)
		return;

	if (win == DEFAULT_ZPOS)
		win = ctx->default_win;

	if (win < 0 || win >= WINDOWS_NR)
		return;

	win_data = &ctx->win_data[win];

	win_data->enabled = true;

	DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data->dma_addr);

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

static void vidi_win_disable(struct device *dev, int zpos)
{
	struct vidi_context *ctx = get_vidi_context(dev);
	struct vidi_win_data *win_data;
	int win = zpos;

	if (win == DEFAULT_ZPOS)
		win = ctx->default_win;

	if (win < 0 || win >= WINDOWS_NR)
		return;

	win_data = &ctx->win_data[win];
	win_data->enabled = false;

	/* TODO. */
}

static struct exynos_drm_overlay_ops vidi_overlay_ops = {
	.mode_set = vidi_win_mode_set,
	.commit = vidi_win_commit,
	.disable = vidi_win_disable,
};

static struct exynos_drm_manager vidi_manager = {
	.pipe		= -1,
	.ops		= &vidi_manager_ops,
	.overlay_ops	= &vidi_overlay_ops,
	.display_ops	= &vidi_display_ops,
};

static void vidi_fake_vblank_handler(struct work_struct *work)
{
	struct vidi_context *ctx = container_of(work, struct vidi_context,
					work);
	struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
	struct exynos_drm_manager *manager = subdrv->manager;

	if (manager->pipe < 0)
		return;

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

	mutex_lock(&ctx->lock);

	if (ctx->direct_vblank) {
		drm_handle_vblank(subdrv->drm_dev, manager->pipe);
		ctx->direct_vblank = false;
		mutex_unlock(&ctx->lock);
		return;
	}

	mutex_unlock(&ctx->lock);

	exynos_drm_crtc_finish_pageflip(subdrv->drm_dev, manager->pipe);
}

static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
{
	/*
	 * enable drm irq mode.
	 * - with irq_enabled = 1, we can use the vblank feature.
	 *
	 * P.S. note that we wouldn't use drm irq handler but
	 *	just specific driver own one instead because
	 *	drm framework supports only one irq handler.
	 */
	drm_dev->irq_enabled = 1;

	/*
	 * with vblank_disable_allowed = 1, vblank interrupt will be disabled
	 * by drm timer once a current process gives up ownership of
	 * vblank event.(after drm_vblank_put function is called)
	 */
	drm_dev->vblank_disable_allowed = 1;

	return 0;
}

static void vidi_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
{
	/* TODO. */
}

static int vidi_power_on(struct vidi_context *ctx, bool enable)
{
	struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
	struct device *dev = subdrv->dev;

	if (enable) {
		ctx->suspended = false;

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

		vidi_apply(dev);
	} else {
		ctx->suspended = true;
	}

	return 0;
}

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

	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 = get_vidi_context(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->subdrv.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 = NULL;
	struct drm_encoder *encoder;
	struct exynos_drm_manager *manager;
	struct exynos_drm_display_ops *display_ops;
	struct drm_exynos_vidi_connection *vidi = data;
	int edid_len;

	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;
	}

	list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
								head) {
		manager = exynos_drm_get_manager(encoder);
		display_ops = manager->display_ops;

		if (display_ops->type == EXYNOS_DISPLAY_TYPE_VIDI) {
			ctx = get_vidi_context(manager->dev);
			break;
		}
	}

	if (!ctx) {
		DRM_DEBUG_KMS("not found virtual device type encoder.\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;
		}
		edid_len = (1 + raw_edid->extensions) * EDID_LENGTH;
		ctx->raw_edid = kmemdup(raw_edid, edid_len, GFP_KERNEL);
		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->subdrv.drm_dev);

	return 0;
}

static int vidi_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct vidi_context *ctx;
	struct exynos_drm_subdrv *subdrv;
	int ret;

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

	ctx->default_win = 0;

	INIT_WORK(&ctx->work, vidi_fake_vblank_handler);

	subdrv = &ctx->subdrv;
	subdrv->dev = dev;
	subdrv->manager = &vidi_manager;
	subdrv->probe = vidi_subdrv_probe;
	subdrv->remove = vidi_subdrv_remove;

	mutex_init(&ctx->lock);

	platform_set_drvdata(pdev, ctx);

	ret = device_create_file(dev, &dev_attr_connection);
	if (ret < 0)
		DRM_INFO("failed to create connection sysfs.\n");

	exynos_drm_subdrv_register(subdrv);

	return 0;
}

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

	exynos_drm_subdrv_unregister(&ctx->subdrv);

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

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int vidi_suspend(struct device *dev)
{
	struct vidi_context *ctx = get_vidi_context(dev);

	return vidi_power_on(ctx, false);
}

static int vidi_resume(struct device *dev)
{
	struct vidi_context *ctx = get_vidi_context(dev);

	return vidi_power_on(ctx, true);
}
#endif

static const struct dev_pm_ops vidi_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend, vidi_resume)
};

struct platform_driver vidi_driver = {
	.probe		= vidi_probe,
	.remove		= vidi_remove,
	.driver		= {
		.name	= "exynos-drm-vidi",
		.owner	= THIS_MODULE,
		.pm	= &vidi_pm_ops,
	},
};
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 ID	16	#include <linux/platform_device.h>
	17
	18	#include <drm/exynos_drm.h>
	19
760285e7 DH	20	#include <drm/drm_edid.h>
760285e7 DH	21	#include <drm/drm_crtc_helper.h>
b73d1230 ID	22
	23	#include "exynos_drm_drv.h"
	24	#include "exynos_drm_crtc.h"
	25	#include "exynos_drm_encoder.h"
	26
	27	/* vidi has totally three virtual windows. */
	28	#define WINDOWS_NR 3
	29
	30	#define get_vidi_context(dev) platform_get_drvdata(to_platform_device(dev))
	31
	32	struct vidi_win_data {
	33	unsigned int offset_x;
	34	unsigned int offset_y;
	35	unsigned int ovl_width;
	36	unsigned int ovl_height;
	37	unsigned int fb_width;
	38	unsigned int fb_height;
	39	unsigned int bpp;
	40	dma_addr_t dma_addr;
b73d1230 ID	41	unsigned int buf_offsize;
	42	unsigned int line_size; /* bytes */
	43	bool enabled;
	44	};
	45
	46	struct vidi_context {
	47	struct exynos_drm_subdrv subdrv;
	48	struct drm_crtc *crtc;
	49	struct vidi_win_data win_data[WINDOWS_NR];
	50	struct edid *raw_edid;
	51	unsigned int clkdiv;
	52	unsigned int default_win;
	53	unsigned long irq_flags;
	54	unsigned int connected;
	55	bool vblank_on;
	56	bool suspended;
291257cf	57	bool direct_vblank;
b73d1230 ID	58	struct work_struct work;
	59	struct mutex lock;
	60	};
	61
	62	static const char fake_edid_info[] = {
	63	0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
	64	0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
	65	0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
	66	0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
	67	0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
	68	0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
	69	0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
	70	0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
	71	0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
	72	0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
	73	0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
	74	0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
	75	0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
	76	0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
	77	0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
	78	0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
	79	0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
	80	0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 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, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	84	0x00, 0x00, 0x00, 0x06
	85	};
	86
b73d1230 ID	87	static bool vidi_display_is_connected(struct device *dev)
	88	{
	89	struct vidi_context *ctx = get_vidi_context(dev);
	90
b73d1230 ID	91	/*
	92	* connection request would come from user side
	93	* to do hotplug through specific ioctl.
	94	*/
	95	return ctx->connected ? true : false;
	96	}
	97
9c08e4ba RS	98	static struct edid vidi_get_edid(struct device dev,
9c08e4ba RS	99	struct drm_connector *connector)
b73d1230 ID	100	{
b73d1230 ID	101	struct vidi_context *ctx = get_vidi_context(dev);
9c08e4ba RS	102	struct edid *edid;
9c08e4ba RS	103	int edid_len;
b73d1230	104
b73d1230 ID	105	/*
	106	* the edid data comes from user side and it would be set
	107	* to ctx->raw_edid through specific ioctl.
	108	*/
	109	if (!ctx->raw_edid) {
	110	DRM_DEBUG_KMS("raw_edid is null.\n");
9c08e4ba	111	return ERR_PTR(-EFAULT);
b73d1230 ID	112	}
b73d1230 ID	113
9c08e4ba	114	edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
e2779e16	115	edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
9c08e4ba RS	116	if (!edid) {
	117	DRM_DEBUG_KMS("failed to allocate edid\n");
	118	return ERR_PTR(-ENOMEM);
	119	}
b73d1230	120
9c08e4ba	121	return edid;
b73d1230 ID	122	}
	123
	124	static void vidi_get_panel(struct device dev)
	125	{
b73d1230 ID	126	/* TODO. */
	127
	128	return NULL;
	129	}
	130
16844fb1	131	static int vidi_check_mode(struct device dev, struct drm_display_mode mode)
b73d1230	132	{
b73d1230 ID	133	/* TODO. */
	134
	135	return 0;
	136	}
	137
	138	static int vidi_display_power_on(struct device *dev, int mode)
	139	{
b73d1230 ID	140	/* TODO */
	141
	142	return 0;
	143	}
	144
	145	static struct exynos_drm_display_ops vidi_display_ops = {
	146	.type = EXYNOS_DISPLAY_TYPE_VIDI,
	147	.is_connected = vidi_display_is_connected,
	148	.get_edid = vidi_get_edid,
	149	.get_panel = vidi_get_panel,
16844fb1	150	.check_mode = vidi_check_mode,
b73d1230 ID	151	.power_on = vidi_display_power_on,
	152	};
	153
	154	static void vidi_dpms(struct device *subdrv_dev, int mode)
	155	{
	156	struct vidi_context *ctx = get_vidi_context(subdrv_dev);
	157
bca34c9a	158	DRM_DEBUG_KMS("%d\n", mode);
b73d1230 ID	159
	160	mutex_lock(&ctx->lock);
	161
	162	switch (mode) {
	163	case DRM_MODE_DPMS_ON:
	164	/* TODO. */
	165	break;
	166	case DRM_MODE_DPMS_STANDBY:
	167	case DRM_MODE_DPMS_SUSPEND:
	168	case DRM_MODE_DPMS_OFF:
	169	/* TODO. */
	170	break;
	171	default:
	172	DRM_DEBUG_KMS("unspecified mode %d\n", mode);
	173	break;
	174	}
	175
	176	mutex_unlock(&ctx->lock);
	177	}
	178
	179	static void vidi_apply(struct device *subdrv_dev)
	180	{
	181	struct vidi_context *ctx = get_vidi_context(subdrv_dev);
677e84c1	182	struct exynos_drm_manager *mgr = ctx->subdrv.manager;
b73d1230 ID	183	struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
	184	struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops;
	185	struct vidi_win_data *win_data;
	186	int i;
	187
b73d1230 ID	188	for (i = 0; i < WINDOWS_NR; i++) {
	189	win_data = &ctx->win_data[i];
	190	if (win_data->enabled && (ovl_ops && ovl_ops->commit))
	191	ovl_ops->commit(subdrv_dev, i);
	192	}
	193
	194	if (mgr_ops && mgr_ops->commit)
	195	mgr_ops->commit(subdrv_dev);
	196	}
	197
	198	static void vidi_commit(struct device *dev)
	199	{
	200	struct vidi_context *ctx = get_vidi_context(dev);
	201
b73d1230 ID	202	if (ctx->suspended)
	203	return;
	204	}
	205
	206	static int vidi_enable_vblank(struct device *dev)
	207	{
	208	struct vidi_context *ctx = get_vidi_context(dev);
	209
b73d1230 ID	210	if (ctx->suspended)
	211	return -EPERM;
	212
	213	if (!test_and_set_bit(0, &ctx->irq_flags))
	214	ctx->vblank_on = true;
	215
291257cf ID	216	ctx->direct_vblank = true;
	217
	218	/*
	219	* in case of page flip request, vidi_finish_pageflip function
	220	* will not be called because direct_vblank is true and then
	221	* that function will be called by overlay_ops->commit callback
	222	*/
	223	schedule_work(&ctx->work);
	224
b73d1230 ID	225	return 0;
	226	}
	227
	228	static void vidi_disable_vblank(struct device *dev)
	229	{
	230	struct vidi_context *ctx = get_vidi_context(dev);
	231
b73d1230 ID	232	if (ctx->suspended)
	233	return;
	234
	235	if (test_and_clear_bit(0, &ctx->irq_flags))
	236	ctx->vblank_on = false;
	237	}
	238
	239	static struct exynos_drm_manager_ops vidi_manager_ops = {
	240	.dpms = vidi_dpms,
	241	.apply = vidi_apply,
	242	.commit = vidi_commit,
	243	.enable_vblank = vidi_enable_vblank,
	244	.disable_vblank = vidi_disable_vblank,
	245	};
	246
	247	static void vidi_win_mode_set(struct device *dev,
	248	struct exynos_drm_overlay *overlay)
	249	{
	250	struct vidi_context *ctx = get_vidi_context(dev);
	251	struct vidi_win_data *win_data;
	252	int win;
	253	unsigned long offset;
	254
b73d1230 ID	255	if (!overlay) {
	256	dev_err(dev, "overlay is NULL\n");
	257	return;
	258	}
	259
	260	win = overlay->zpos;
	261	if (win == DEFAULT_ZPOS)
	262	win = ctx->default_win;
	263
a7f98d6a	264	if (win < 0 \|\| win >= WINDOWS_NR)
b73d1230 ID	265	return;
	266
	267	offset = overlay->fb_x * (overlay->bpp >> 3);
	268	offset += overlay->fb_y * overlay->pitch;
	269
	270	DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
	271
	272	win_data = &ctx->win_data[win];
	273
	274	win_data->offset_x = overlay->crtc_x;
	275	win_data->offset_y = overlay->crtc_y;
	276	win_data->ovl_width = overlay->crtc_width;
	277	win_data->ovl_height = overlay->crtc_height;
	278	win_data->fb_width = overlay->fb_width;
	279	win_data->fb_height = overlay->fb_height;
	280	win_data->dma_addr = overlay->dma_addr[0] + offset;
b73d1230 ID	281	win_data->bpp = overlay->bpp;
	282	win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
	283	(overlay->bpp >> 3);
	284	win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
	285
	286	/*
	287	* some parts of win_data should be transferred to user side
	288	* through specific ioctl.
	289	*/
	290
	291	DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
	292	win_data->offset_x, win_data->offset_y);
	293	DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
	294	win_data->ovl_width, win_data->ovl_height);
ddd8e959	295	DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
b73d1230 ID	296	DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
	297	overlay->fb_width, overlay->crtc_width);
	298	}
	299
	300	static void vidi_win_commit(struct device *dev, int zpos)
	301	{
	302	struct vidi_context *ctx = get_vidi_context(dev);
	303	struct vidi_win_data *win_data;
	304	int win = zpos;
	305
b73d1230 ID	306	if (ctx->suspended)
	307	return;
	308
	309	if (win == DEFAULT_ZPOS)
	310	win = ctx->default_win;
	311
a7f98d6a	312	if (win < 0 \|\| win >= WINDOWS_NR)
b73d1230 ID	313	return;
	314
	315	win_data = &ctx->win_data[win];
	316
	317	win_data->enabled = true;
	318
	319	DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data->dma_addr);
	320
	321	if (ctx->vblank_on)
	322	schedule_work(&ctx->work);
	323	}
	324
	325	static void vidi_win_disable(struct device *dev, int zpos)
	326	{
	327	struct vidi_context *ctx = get_vidi_context(dev);
	328	struct vidi_win_data *win_data;
	329	int win = zpos;
	330
b73d1230 ID	331	if (win == DEFAULT_ZPOS)
	332	win = ctx->default_win;
	333
a7f98d6a	334	if (win < 0 \|\| win >= WINDOWS_NR)
b73d1230 ID	335	return;
	336
	337	win_data = &ctx->win_data[win];
	338	win_data->enabled = false;
	339
	340	/* TODO. */
	341	}
	342
	343	static struct exynos_drm_overlay_ops vidi_overlay_ops = {
	344	.mode_set = vidi_win_mode_set,
	345	.commit = vidi_win_commit,
	346	.disable = vidi_win_disable,
	347	};
	348
677e84c1 JS	349	static struct exynos_drm_manager vidi_manager = {
	350	.pipe = -1,
	351	.ops = &vidi_manager_ops,
	352	.overlay_ops = &vidi_overlay_ops,
	353	.display_ops = &vidi_display_ops,
	354	};
	355
b73d1230 ID	356	static void vidi_fake_vblank_handler(struct work_struct *work)
	357	{
	358	struct vidi_context *ctx = container_of(work, struct vidi_context,
	359	work);
	360	struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
677e84c1	361	struct exynos_drm_manager *manager = subdrv->manager;
b73d1230 ID	362
	363	if (manager->pipe < 0)
	364	return;
	365
	366	/* refresh rate is about 50Hz. */
	367	usleep_range(16000, 20000);
	368
291257cf ID	369	mutex_lock(&ctx->lock);
	370
	371	if (ctx->direct_vblank) {
	372	drm_handle_vblank(subdrv->drm_dev, manager->pipe);
	373	ctx->direct_vblank = false;
	374	mutex_unlock(&ctx->lock);
	375	return;
	376	}
	377
	378	mutex_unlock(&ctx->lock);
	379
663d8766	380	exynos_drm_crtc_finish_pageflip(subdrv->drm_dev, manager->pipe);
b73d1230 ID	381	}
	382
	383	static int vidi_subdrv_probe(struct drm_device drm_dev, struct device dev)
	384	{
b73d1230 ID	385	/*
	386	* enable drm irq mode.
	387	* - with irq_enabled = 1, we can use the vblank feature.
	388	*
	389	* P.S. note that we wouldn't use drm irq handler but
	390	* just specific driver own one instead because
	391	* drm framework supports only one irq handler.
	392	*/
	393	drm_dev->irq_enabled = 1;
	394
	395	/*
	396	* with vblank_disable_allowed = 1, vblank interrupt will be disabled
	397	* by drm timer once a current process gives up ownership of
	398	* vblank event.(after drm_vblank_put function is called)
	399	*/
	400	drm_dev->vblank_disable_allowed = 1;
	401
	402	return 0;
	403	}
	404
29cb6025	405	static void vidi_subdrv_remove(struct drm_device drm_dev, struct device dev)
b73d1230	406	{
b73d1230 ID	407	/* TODO. */
	408	}
	409
	410	static int vidi_power_on(struct vidi_context *ctx, bool enable)
	411	{
	412	struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
677e84c1	413	struct device *dev = subdrv->dev;
b73d1230	414
b73d1230 ID	415	if (enable) {
	416	ctx->suspended = false;
	417
	418	/* if vblank was enabled status, enable it again. */
	419	if (test_and_clear_bit(0, &ctx->irq_flags))
	420	vidi_enable_vblank(dev);
	421
	422	vidi_apply(dev);
	423	} else {
	424	ctx->suspended = true;
	425	}
	426
	427	return 0;
	428	}
	429
	430	static int vidi_show_connection(struct device *dev,
	431	struct device_attribute attr, char buf)
	432	{
	433	int rc;
	434	struct vidi_context *ctx = get_vidi_context(dev);
	435
	436	mutex_lock(&ctx->lock);
	437
	438	rc = sprintf(buf, "%d\n", ctx->connected);
	439
	440	mutex_unlock(&ctx->lock);
	441
	442	return rc;
	443	}
	444
	445	static int vidi_store_connection(struct device *dev,
	446	struct device_attribute *attr,
	447	const char *buf, size_t len)
	448	{
	449	struct vidi_context *ctx = get_vidi_context(dev);
	450	int ret;
	451
b73d1230 ID	452	ret = kstrtoint(buf, 0, &ctx->connected);
	453	if (ret)
	454	return ret;
	455
	456	if (ctx->connected > 1)
	457	return -EINVAL;
	458
d07d39df ID	459	/* use fake edid data for test. */
	460	if (!ctx->raw_edid)
	461	ctx->raw_edid = (struct edid *)fake_edid_info;
	462
d7b8478a ID	463	/* if raw_edid isn't same as fake data then it can't be tested. */
	464	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
	465	DRM_DEBUG_KMS("edid data is not fake data.\n");
	466	return -EINVAL;
	467	}
	468
b73d1230 ID	469	DRM_DEBUG_KMS("requested connection.\n");
	470
	471	drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
	472
	473	return len;
	474	}
	475
	476	static DEVICE_ATTR(connection, 0644, vidi_show_connection,
	477	vidi_store_connection);
	478
	479	int vidi_connection_ioctl(struct drm_device drm_dev, void data,
	480	struct drm_file *file_priv)
	481	{
	482	struct vidi_context *ctx = NULL;
	483	struct drm_encoder *encoder;
	484	struct exynos_drm_manager *manager;
	485	struct exynos_drm_display_ops *display_ops;
	486	struct drm_exynos_vidi_connection *vidi = data;
d3b62dbf	487	int edid_len;
b73d1230	488
b73d1230 ID	489	if (!vidi) {
	490	DRM_DEBUG_KMS("user data for vidi is null.\n");
	491	return -EINVAL;
	492	}
	493
b73d1230 ID	494	if (vidi->connection > 1) {
	495	DRM_DEBUG_KMS("connection should be 0 or 1.\n");
	496	return -EINVAL;
	497	}
	498
	499	list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
	500	head) {
	501	manager = exynos_drm_get_manager(encoder);
	502	display_ops = manager->display_ops;
	503
	504	if (display_ops->type == EXYNOS_DISPLAY_TYPE_VIDI) {
	505	ctx = get_vidi_context(manager->dev);
	506	break;
	507	}
	508	}
	509
	510	if (!ctx) {
	511	DRM_DEBUG_KMS("not found virtual device type encoder.\n");
	512	return -EINVAL;
	513	}
	514
	515	if (ctx->connected == vidi->connection) {
	516	DRM_DEBUG_KMS("same connection request.\n");
	517	return -EINVAL;
	518	}
	519
d3b62dbf	520	if (vidi->connection) {
e7808df1 SWK	521	struct edid raw_edid = (struct edid )(uint32_t)vidi->edid;
	522	if (!drm_edid_is_valid(raw_edid)) {
	523	DRM_DEBUG_KMS("edid data is invalid.\n");
d3b62dbf ID	524	return -EINVAL;
d3b62dbf ID	525	}
d3b62dbf	526	edid_len = (1 + raw_edid->extensions) * EDID_LENGTH;
e2779e16	527	ctx->raw_edid = kmemdup(raw_edid, edid_len, GFP_KERNEL);
d3b62dbf ID	528	if (!ctx->raw_edid) {
	529	DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
	530	return -ENOMEM;
	531	}
d3b62dbf ID	532	} else {
	533	/*
	534	* with connection = 0, free raw_edid
	535	* only if raw edid data isn't same as fake data.
	536	*/
	537	if (ctx->raw_edid && ctx->raw_edid !=
	538	(struct edid *)fake_edid_info) {
	539	kfree(ctx->raw_edid);
	540	ctx->raw_edid = NULL;
	541	}
	542	}
b73d1230 ID	543
	544	ctx->connected = vidi->connection;
	545	drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
	546
	547	return 0;
	548	}
	549
56550d94	550	static int vidi_probe(struct platform_device *pdev)
b73d1230 ID	551	{
	552	struct device *dev = &pdev->dev;
	553	struct vidi_context *ctx;
	554	struct exynos_drm_subdrv *subdrv;
	555	int ret;
	556
d873ab99	557	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
b73d1230 ID	558	if (!ctx)
	559	return -ENOMEM;
	560
	561	ctx->default_win = 0;
	562
	563	INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
	564
b73d1230	565	subdrv = &ctx->subdrv;
677e84c1 JS	566	subdrv->dev = dev;
677e84c1 JS	567	subdrv->manager = &vidi_manager;
b73d1230 ID	568	subdrv->probe = vidi_subdrv_probe;
b73d1230 ID	569	subdrv->remove = vidi_subdrv_remove;
b73d1230 ID	570
	571	mutex_init(&ctx->lock);
	572
	573	platform_set_drvdata(pdev, ctx);
	574
d873ab99	575	ret = device_create_file(dev, &dev_attr_connection);
b73d1230 ID	576	if (ret < 0)
	577	DRM_INFO("failed to create connection sysfs.\n");
	578
	579	exynos_drm_subdrv_register(subdrv);
	580
	581	return 0;
	582	}
	583
56550d94	584	static int vidi_remove(struct platform_device *pdev)
b73d1230 ID	585	{
	586	struct vidi_context *ctx = platform_get_drvdata(pdev);
	587
b73d1230 ID	588	exynos_drm_subdrv_unregister(&ctx->subdrv);
b73d1230 ID	589
d3b62dbf ID	590	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
	591	kfree(ctx->raw_edid);
	592	ctx->raw_edid = NULL;
	593	}
	594
b73d1230 ID	595	return 0;
	596	}
	597
	598	#ifdef CONFIG_PM_SLEEP
	599	static int vidi_suspend(struct device *dev)
	600	{
	601	struct vidi_context *ctx = get_vidi_context(dev);
	602
	603	return vidi_power_on(ctx, false);
	604	}
	605
	606	static int vidi_resume(struct device *dev)
	607	{
	608	struct vidi_context *ctx = get_vidi_context(dev);
	609
	610	return vidi_power_on(ctx, true);
	611	}
	612	#endif
	613
	614	static const struct dev_pm_ops vidi_pm_ops = {
	615	SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend, vidi_resume)
	616	};
	617
	618	struct platform_driver vidi_driver = {
	619	.probe = vidi_probe,
56550d94	620	.remove = vidi_remove,
b73d1230 ID	621	.driver = {
	622	.name = "exynos-drm-vidi",
	623	.owner = THIS_MODULE,
	624	.pm = &vidi_pm_ops,
	625	},
	626	};