[deliverable/linux.git] / drivers / gpu / drm / imx / imx-drm-core.c

/*
 * Freescale i.MX drm driver
 *
 * Copyright (C) 2011 Sascha Hauer, Pengutronix
 *
 * 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.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */
#include <linux/component.h>
#include <linux/device.h>
#include <linux/fb.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <drm/drmP.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_of.h>
#include <video/imx-ipu-v3.h>

#include "imx-drm.h"

#define MAX_CRTC	4

struct imx_drm_component {
	struct device_node *of_node;
	struct list_head list;
};

struct imx_drm_device {
	struct drm_device			*drm;
	struct imx_drm_crtc			*crtc[MAX_CRTC];
	unsigned int				pipes;
	struct drm_fbdev_cma			*fbhelper;
};

struct imx_drm_crtc {
	struct drm_crtc				*crtc;
	struct imx_drm_crtc_helper_funcs	imx_drm_helper_funcs;
};

#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
static int legacyfb_depth = 16;
module_param(legacyfb_depth, int, 0444);
#endif

unsigned int imx_drm_crtc_id(struct imx_drm_crtc *crtc)
{
	return drm_crtc_index(crtc->crtc);
}
EXPORT_SYMBOL_GPL(imx_drm_crtc_id);

static void imx_drm_driver_lastclose(struct drm_device *drm)
{
	struct imx_drm_device *imxdrm = drm->dev_private;

	drm_fbdev_cma_restore_mode(imxdrm->fbhelper);
}

static int imx_drm_driver_unload(struct drm_device *drm)
{
	struct imx_drm_device *imxdrm = drm->dev_private;

	drm_kms_helper_poll_fini(drm);

	if (imxdrm->fbhelper)
		drm_fbdev_cma_fini(imxdrm->fbhelper);

	component_unbind_all(drm->dev, drm);

	drm_vblank_cleanup(drm);
	drm_mode_config_cleanup(drm);

	platform_set_drvdata(drm->platformdev, NULL);

	return 0;
}

static struct imx_drm_crtc *imx_drm_find_crtc(struct drm_crtc *crtc)
{
	struct imx_drm_device *imxdrm = crtc->dev->dev_private;
	unsigned i;

	for (i = 0; i < MAX_CRTC; i++)
		if (imxdrm->crtc[i] && imxdrm->crtc[i]->crtc == crtc)
			return imxdrm->crtc[i];

	return NULL;
}

int imx_drm_set_bus_config(struct drm_encoder *encoder, u32 bus_format,
		int hsync_pin, int vsync_pin, u32 bus_flags)
{
	struct imx_drm_crtc_helper_funcs *helper;
	struct imx_drm_crtc *imx_crtc;

	imx_crtc = imx_drm_find_crtc(encoder->crtc);
	if (!imx_crtc)
		return -EINVAL;

	helper = &imx_crtc->imx_drm_helper_funcs;
	if (helper->set_interface_pix_fmt)
		return helper->set_interface_pix_fmt(encoder->crtc,
					bus_format, hsync_pin, vsync_pin,
					bus_flags);
	return 0;
}
EXPORT_SYMBOL_GPL(imx_drm_set_bus_config);

int imx_drm_set_bus_format(struct drm_encoder *encoder, u32 bus_format)
{
	return imx_drm_set_bus_config(encoder, bus_format, 2, 3,
				      DRM_BUS_FLAG_DE_HIGH |
				      DRM_BUS_FLAG_PIXDATA_NEGEDGE);
}
EXPORT_SYMBOL_GPL(imx_drm_set_bus_format);

int imx_drm_crtc_vblank_get(struct imx_drm_crtc *imx_drm_crtc)
{
	return drm_crtc_vblank_get(imx_drm_crtc->crtc);
}
EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_get);

void imx_drm_crtc_vblank_put(struct imx_drm_crtc *imx_drm_crtc)
{
	drm_crtc_vblank_put(imx_drm_crtc->crtc);
}
EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_put);

void imx_drm_handle_vblank(struct imx_drm_crtc *imx_drm_crtc)
{
	drm_crtc_handle_vblank(imx_drm_crtc->crtc);
}
EXPORT_SYMBOL_GPL(imx_drm_handle_vblank);

static int imx_drm_enable_vblank(struct drm_device *drm, unsigned int pipe)
{
	struct imx_drm_device *imxdrm = drm->dev_private;
	struct imx_drm_crtc *imx_drm_crtc = imxdrm->crtc[pipe];
	int ret;

	if (!imx_drm_crtc)
		return -EINVAL;

	if (!imx_drm_crtc->imx_drm_helper_funcs.enable_vblank)
		return -ENOSYS;

	ret = imx_drm_crtc->imx_drm_helper_funcs.enable_vblank(
			imx_drm_crtc->crtc);

	return ret;
}

static void imx_drm_disable_vblank(struct drm_device *drm, unsigned int pipe)
{
	struct imx_drm_device *imxdrm = drm->dev_private;
	struct imx_drm_crtc *imx_drm_crtc = imxdrm->crtc[pipe];

	if (!imx_drm_crtc)
		return;

	if (!imx_drm_crtc->imx_drm_helper_funcs.disable_vblank)
		return;

	imx_drm_crtc->imx_drm_helper_funcs.disable_vblank(imx_drm_crtc->crtc);
}

static const struct file_operations imx_drm_driver_fops = {
	.owner = THIS_MODULE,
	.open = drm_open,
	.release = drm_release,
	.unlocked_ioctl = drm_ioctl,
	.mmap = drm_gem_cma_mmap,
	.poll = drm_poll,
	.read = drm_read,
	.llseek = noop_llseek,
};

void imx_drm_connector_destroy(struct drm_connector *connector)
{
	drm_connector_unregister(connector);
	drm_connector_cleanup(connector);
}
EXPORT_SYMBOL_GPL(imx_drm_connector_destroy);

void imx_drm_encoder_destroy(struct drm_encoder *encoder)
{
	drm_encoder_cleanup(encoder);
}
EXPORT_SYMBOL_GPL(imx_drm_encoder_destroy);

static void imx_drm_output_poll_changed(struct drm_device *drm)
{
	struct imx_drm_device *imxdrm = drm->dev_private;

	drm_fbdev_cma_hotplug_event(imxdrm->fbhelper);
}

static const struct drm_mode_config_funcs imx_drm_mode_config_funcs = {
	.fb_create = drm_fb_cma_create,
	.output_poll_changed = imx_drm_output_poll_changed,
};

/*
 * Main DRM initialisation. This binds, initialises and registers
 * with DRM the subcomponents of the driver.
 */
static int imx_drm_driver_load(struct drm_device *drm, unsigned long flags)
{
	struct imx_drm_device *imxdrm;
	struct drm_connector *connector;
	int ret;

	imxdrm = devm_kzalloc(drm->dev, sizeof(*imxdrm), GFP_KERNEL);
	if (!imxdrm)
		return -ENOMEM;

	imxdrm->drm = drm;

	drm->dev_private = imxdrm;

	/*
	 * enable drm irq mode.
	 * - with irq_enabled = true, 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 and
	 *      drivers can well take care of their interrupts
	 */
	drm->irq_enabled = true;

	/*
	 * set max width and height as default value(4096x4096).
	 * this value would be used to check framebuffer size limitation
	 * at drm_mode_addfb().
	 */
	drm->mode_config.min_width = 64;
	drm->mode_config.min_height = 64;
	drm->mode_config.max_width = 4096;
	drm->mode_config.max_height = 4096;
	drm->mode_config.funcs = &imx_drm_mode_config_funcs;

	drm_mode_config_init(drm);

	ret = drm_vblank_init(drm, MAX_CRTC);
	if (ret)
		goto err_kms;

	platform_set_drvdata(drm->platformdev, drm);

	/* Now try and bind all our sub-components */
	ret = component_bind_all(drm->dev, drm);
	if (ret)
		goto err_vblank;

	/*
	 * All components are now added, we can publish the connector sysfs
	 * entries to userspace.  This will generate hotplug events and so
	 * userspace will expect to be able to access DRM at this point.
	 */
	list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
		ret = drm_connector_register(connector);
		if (ret) {
			dev_err(drm->dev,
				"[CONNECTOR:%d:%s] drm_connector_register failed: %d\n",
				connector->base.id,
				connector->name, ret);
			goto err_unbind;
		}
	}

	/*
	 * All components are now initialised, so setup the fb helper.
	 * The fb helper takes copies of key hardware information, so the
	 * crtcs/connectors/encoders must not change after this point.
	 */
#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
	if (legacyfb_depth != 16 && legacyfb_depth != 32) {
		dev_warn(drm->dev, "Invalid legacyfb_depth.  Defaulting to 16bpp\n");
		legacyfb_depth = 16;
	}
	drm_helper_disable_unused_functions(drm);
	imxdrm->fbhelper = drm_fbdev_cma_init(drm, legacyfb_depth,
				drm->mode_config.num_crtc, MAX_CRTC);
	if (IS_ERR(imxdrm->fbhelper)) {
		ret = PTR_ERR(imxdrm->fbhelper);
		imxdrm->fbhelper = NULL;
		goto err_unbind;
	}
#endif

	drm_kms_helper_poll_init(drm);

	return 0;

err_unbind:
	component_unbind_all(drm->dev, drm);
err_vblank:
	drm_vblank_cleanup(drm);
err_kms:
	drm_mode_config_cleanup(drm);

	return ret;
}

/*
 * imx_drm_add_crtc - add a new crtc
 */
int imx_drm_add_crtc(struct drm_device *drm, struct drm_crtc *crtc,
		struct imx_drm_crtc **new_crtc, struct drm_plane *primary_plane,
		const struct imx_drm_crtc_helper_funcs *imx_drm_helper_funcs,
		struct device_node *port)
{
	struct imx_drm_device *imxdrm = drm->dev_private;
	struct imx_drm_crtc *imx_drm_crtc;

	/*
	 * The vblank arrays are dimensioned by MAX_CRTC - we can't
	 * pass IDs greater than this to those functions.
	 */
	if (imxdrm->pipes >= MAX_CRTC)
		return -EINVAL;

	if (imxdrm->drm->open_count)
		return -EBUSY;

	imx_drm_crtc = kzalloc(sizeof(*imx_drm_crtc), GFP_KERNEL);
	if (!imx_drm_crtc)
		return -ENOMEM;

	imx_drm_crtc->imx_drm_helper_funcs = *imx_drm_helper_funcs;
	imx_drm_crtc->crtc = crtc;

	crtc->port = port;

	imxdrm->crtc[imxdrm->pipes++] = imx_drm_crtc;

	*new_crtc = imx_drm_crtc;

	drm_crtc_helper_add(crtc,
			imx_drm_crtc->imx_drm_helper_funcs.crtc_helper_funcs);

	drm_crtc_init_with_planes(drm, crtc, primary_plane, NULL,
			imx_drm_crtc->imx_drm_helper_funcs.crtc_funcs, NULL);

	return 0;
}
EXPORT_SYMBOL_GPL(imx_drm_add_crtc);

/*
 * imx_drm_remove_crtc - remove a crtc
 */
int imx_drm_remove_crtc(struct imx_drm_crtc *imx_drm_crtc)
{
	struct imx_drm_device *imxdrm = imx_drm_crtc->crtc->dev->dev_private;
	unsigned int pipe = drm_crtc_index(imx_drm_crtc->crtc);

	drm_crtc_cleanup(imx_drm_crtc->crtc);

	imxdrm->crtc[pipe] = NULL;

	kfree(imx_drm_crtc);

	return 0;
}
EXPORT_SYMBOL_GPL(imx_drm_remove_crtc);

int imx_drm_encoder_parse_of(struct drm_device *drm,
	struct drm_encoder *encoder, struct device_node *np)
{
	uint32_t crtc_mask = drm_of_find_possible_crtcs(drm, np);

	/*
	 * If we failed to find the CRTC(s) which this encoder is
	 * supposed to be connected to, it's because the CRTC has
	 * not been registered yet.  Defer probing, and hope that
	 * the required CRTC is added later.
	 */
	if (crtc_mask == 0)
		return -EPROBE_DEFER;

	encoder->possible_crtcs = crtc_mask;

	/* FIXME: this is the mask of outputs which can clone this output. */
	encoder->possible_clones = ~0;

	return 0;
}
EXPORT_SYMBOL_GPL(imx_drm_encoder_parse_of);

static const struct drm_ioctl_desc imx_drm_ioctls[] = {
	/* none so far */
};

static struct drm_driver imx_drm_driver = {
	.driver_features	= DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
	.load			= imx_drm_driver_load,
	.unload			= imx_drm_driver_unload,
	.lastclose		= imx_drm_driver_lastclose,
	.set_busid		= drm_platform_set_busid,
	.gem_free_object_unlocked = drm_gem_cma_free_object,
	.gem_vm_ops		= &drm_gem_cma_vm_ops,
	.dumb_create		= drm_gem_cma_dumb_create,
	.dumb_map_offset	= drm_gem_cma_dumb_map_offset,
	.dumb_destroy		= drm_gem_dumb_destroy,

	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
	.gem_prime_import	= drm_gem_prime_import,
	.gem_prime_export	= drm_gem_prime_export,
	.gem_prime_get_sg_table	= drm_gem_cma_prime_get_sg_table,
	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
	.gem_prime_vmap		= drm_gem_cma_prime_vmap,
	.gem_prime_vunmap	= drm_gem_cma_prime_vunmap,
	.gem_prime_mmap		= drm_gem_cma_prime_mmap,
	.get_vblank_counter	= drm_vblank_no_hw_counter,
	.enable_vblank		= imx_drm_enable_vblank,
	.disable_vblank		= imx_drm_disable_vblank,
	.ioctls			= imx_drm_ioctls,
	.num_ioctls		= ARRAY_SIZE(imx_drm_ioctls),
	.fops			= &imx_drm_driver_fops,
	.name			= "imx-drm",
	.desc			= "i.MX DRM graphics",
	.date			= "20120507",
	.major			= 1,
	.minor			= 0,
	.patchlevel		= 0,
};

static int compare_of(struct device *dev, void *data)
{
	struct device_node *np = data;

	/* Special case for DI, dev->of_node may not be set yet */
	if (strcmp(dev->driver->name, "imx-ipuv3-crtc") == 0) {
		struct ipu_client_platformdata *pdata = dev->platform_data;

		return pdata->of_node == np;
	}

	/* Special case for LDB, one device for two channels */
	if (of_node_cmp(np->name, "lvds-channel") == 0) {
		np = of_get_parent(np);
		of_node_put(np);
	}

	return dev->of_node == np;
}

static int imx_drm_bind(struct device *dev)
{
	return drm_platform_init(&imx_drm_driver, to_platform_device(dev));
}

static void imx_drm_unbind(struct device *dev)
{
	drm_put_dev(dev_get_drvdata(dev));
}

static const struct component_master_ops imx_drm_ops = {
	.bind = imx_drm_bind,
	.unbind = imx_drm_unbind,
};

static int imx_drm_platform_probe(struct platform_device *pdev)
{
	int ret = drm_of_component_probe(&pdev->dev, compare_of, &imx_drm_ops);

	if (!ret)
		ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));

	return ret;
}

static int imx_drm_platform_remove(struct platform_device *pdev)
{
	component_master_del(&pdev->dev, &imx_drm_ops);
	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int imx_drm_suspend(struct device *dev)
{
	struct drm_device *drm_dev = dev_get_drvdata(dev);

	/* The drm_dev is NULL before .load hook is called */
	if (drm_dev == NULL)
		return 0;

	drm_kms_helper_poll_disable(drm_dev);

	return 0;
}

static int imx_drm_resume(struct device *dev)
{
	struct drm_device *drm_dev = dev_get_drvdata(dev);

	if (drm_dev == NULL)
		return 0;

	drm_helper_resume_force_mode(drm_dev);
	drm_kms_helper_poll_enable(drm_dev);

	return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(imx_drm_pm_ops, imx_drm_suspend, imx_drm_resume);

static const struct of_device_id imx_drm_dt_ids[] = {
	{ .compatible = "fsl,imx-display-subsystem", },
	{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, imx_drm_dt_ids);

static struct platform_driver imx_drm_pdrv = {
	.probe		= imx_drm_platform_probe,
	.remove		= imx_drm_platform_remove,
	.driver		= {
		.name	= "imx-drm",
		.pm	= &imx_drm_pm_ops,
		.of_match_table = imx_drm_dt_ids,
	},
};
module_platform_driver(imx_drm_pdrv);

MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
MODULE_DESCRIPTION("i.MX drm driver core");
MODULE_LICENSE("GPL");
Commit	Line	Data
e692da4d SH	1	/*
	2	* Freescale i.MX drm driver
	3	*
	4	* Copyright (C) 2011 Sascha Hauer, Pengutronix
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* as published by the Free Software Foundation; either version 2
	9	* of the License, or (at your option) any later version.
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	*/
17b5001b	16	#include <linux/component.h>
e692da4d	17	#include <linux/device.h>
e7d6231e RK	18	#include <linux/fb.h>
e7d6231e RK	19	#include <linux/module.h>
e692da4d SH	20	#include <linux/platform_device.h>
	21	#include <drm/drmP.h>
	22	#include <drm/drm_fb_helper.h>
	23	#include <drm/drm_crtc_helper.h>
e692da4d SH	24	#include <drm/drm_gem_cma_helper.h>
e692da4d SH	25	#include <drm/drm_fb_cma_helper.h>
3cb9ae4f	26	#include <drm/drm_plane_helper.h>
6457b971	27	#include <drm/drm_of.h>
310944d1	28	#include <video/imx-ipu-v3.h>
e692da4d SH	29
	30	#include "imx-drm.h"
	31
	32	#define MAX_CRTC 4
	33
655b43cc PZ	34	struct imx_drm_component {
	35	struct device_node *of_node;
	36	struct list_head list;
	37	};
	38
e692da4d SH	39	struct imx_drm_device {
e692da4d SH	40	struct drm_device *drm;
887eceac	41	struct imx_drm_crtc *crtc[MAX_CRTC];
d2ab8ad9	42	unsigned int pipes;
e692da4d SH	43	struct drm_fbdev_cma *fbhelper;
	44	};
	45
	46	struct imx_drm_crtc {
	47	struct drm_crtc *crtc;
e692da4d	48	struct imx_drm_crtc_helper_funcs imx_drm_helper_funcs;
e692da4d SH	49	};
e692da4d SH	50
c1ff5a7a	51	#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
8acba02f RK	52	static int legacyfb_depth = 16;
8acba02f RK	53	module_param(legacyfb_depth, int, 0444);
c1ff5a7a	54	#endif
8acba02f	55
d2ab8ad9	56	unsigned int imx_drm_crtc_id(struct imx_drm_crtc *crtc)
b8d181e4	57	{
d4b20e4d	58	return drm_crtc_index(crtc->crtc);
b8d181e4	59	}
9c74360f	60	EXPORT_SYMBOL_GPL(imx_drm_crtc_id);
b8d181e4	61
e692da4d SH	62	static void imx_drm_driver_lastclose(struct drm_device *drm)
	63	{
	64	struct imx_drm_device *imxdrm = drm->dev_private;
	65
3f3a7280	66	drm_fbdev_cma_restore_mode(imxdrm->fbhelper);
e692da4d SH	67	}
	68
	69	static int imx_drm_driver_unload(struct drm_device *drm)
	70	{
	71	struct imx_drm_device *imxdrm = drm->dev_private;
3e68439b RK	72
3e68439b RK	73	drm_kms_helper_poll_fini(drm);
e692da4d	74
8acba02f RK	75	if (imxdrm->fbhelper)
8acba02f RK	76	drm_fbdev_cma_fini(imxdrm->fbhelper);
8acba02f	77
17b5001b RK	78	component_unbind_all(drm->dev, drm);
17b5001b RK	79
020a9ea7	80	drm_vblank_cleanup(drm);
020a9ea7	81	drm_mode_config_cleanup(drm);
e692da4d	82
bfe945c8 SG	83	platform_set_drvdata(drm->platformdev, NULL);
bfe945c8 SG	84
e692da4d SH	85	return 0;
	86	}
	87
fdffa6f2	88	static struct imx_drm_crtc imx_drm_find_crtc(struct drm_crtc crtc)
e692da4d	89	{
32266b45	90	struct imx_drm_device *imxdrm = crtc->dev->dev_private;
887eceac RK	91	unsigned i;
	92
	93	for (i = 0; i < MAX_CRTC; i++)
	94	if (imxdrm->crtc[i] && imxdrm->crtc[i]->crtc == crtc)
	95	return imxdrm->crtc[i];
e692da4d	96
e692da4d SH	97	return NULL;
	98	}
	99
4ed094fd PZ	100	int imx_drm_set_bus_config(struct drm_encoder *encoder, u32 bus_format,
4ed094fd PZ	101	int hsync_pin, int vsync_pin, u32 bus_flags)
e692da4d	102	{
e692da4d	103	struct imx_drm_crtc_helper_funcs *helper;
887eceac	104	struct imx_drm_crtc *imx_crtc;
e692da4d	105
f2d66aad	106	imx_crtc = imx_drm_find_crtc(encoder->crtc);
887eceac RK	107	if (!imx_crtc)
887eceac RK	108	return -EINVAL;
e692da4d	109
e692da4d SH	110	helper = &imx_crtc->imx_drm_helper_funcs;
e692da4d SH	111	if (helper->set_interface_pix_fmt)
f2d66aad	112	return helper->set_interface_pix_fmt(encoder->crtc,
4ed094fd PZ	113	bus_format, hsync_pin, vsync_pin,
4ed094fd PZ	114	bus_flags);
e692da4d SH	115	return 0;
e692da4d SH	116	}
4ed094fd	117	EXPORT_SYMBOL_GPL(imx_drm_set_bus_config);
2ea42608	118
2872c807	119	int imx_drm_set_bus_format(struct drm_encoder *encoder, u32 bus_format)
2ea42608	120	{
4ed094fd PZ	121	return imx_drm_set_bus_config(encoder, bus_format, 2, 3,
	122	DRM_BUS_FLAG_DE_HIGH \|
	123	DRM_BUS_FLAG_PIXDATA_NEGEDGE);
2ea42608	124	}
2872c807	125	EXPORT_SYMBOL_GPL(imx_drm_set_bus_format);
e692da4d SH	126
	127	int imx_drm_crtc_vblank_get(struct imx_drm_crtc *imx_drm_crtc)
	128	{
d4b20e4d	129	return drm_crtc_vblank_get(imx_drm_crtc->crtc);
e692da4d SH	130	}
	131	EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_get);
	132
	133	void imx_drm_crtc_vblank_put(struct imx_drm_crtc *imx_drm_crtc)
	134	{
d4b20e4d	135	drm_crtc_vblank_put(imx_drm_crtc->crtc);
e692da4d SH	136	}
	137	EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_put);
	138
	139	void imx_drm_handle_vblank(struct imx_drm_crtc *imx_drm_crtc)
	140	{
d4b20e4d	141	drm_crtc_handle_vblank(imx_drm_crtc->crtc);
e692da4d SH	142	}
	143	EXPORT_SYMBOL_GPL(imx_drm_handle_vblank);
	144
88e72717	145	static int imx_drm_enable_vblank(struct drm_device *drm, unsigned int pipe)
e692da4d SH	146	{
e692da4d SH	147	struct imx_drm_device *imxdrm = drm->dev_private;
88e72717	148	struct imx_drm_crtc *imx_drm_crtc = imxdrm->crtc[pipe];
e692da4d SH	149	int ret;
e692da4d SH	150
e692da4d SH	151	if (!imx_drm_crtc)
	152	return -EINVAL;
	153
	154	if (!imx_drm_crtc->imx_drm_helper_funcs.enable_vblank)
	155	return -ENOSYS;
	156
	157	ret = imx_drm_crtc->imx_drm_helper_funcs.enable_vblank(
	158	imx_drm_crtc->crtc);
	159
	160	return ret;
	161	}
	162
88e72717	163	static void imx_drm_disable_vblank(struct drm_device *drm, unsigned int pipe)
e692da4d SH	164	{
e692da4d SH	165	struct imx_drm_device *imxdrm = drm->dev_private;
88e72717	166	struct imx_drm_crtc *imx_drm_crtc = imxdrm->crtc[pipe];
e692da4d	167
e692da4d SH	168	if (!imx_drm_crtc)
	169	return;
	170
	171	if (!imx_drm_crtc->imx_drm_helper_funcs.disable_vblank)
	172	return;
	173
	174	imx_drm_crtc->imx_drm_helper_funcs.disable_vblank(imx_drm_crtc->crtc);
	175	}
	176
	177	static const struct file_operations imx_drm_driver_fops = {
	178	.owner = THIS_MODULE,
	179	.open = drm_open,
	180	.release = drm_release,
	181	.unlocked_ioctl = drm_ioctl,
	182	.mmap = drm_gem_cma_mmap,
	183	.poll = drm_poll,
e692da4d SH	184	.read = drm_read,
	185	.llseek = noop_llseek,
	186	};
	187
8a51a33b RK	188	void imx_drm_connector_destroy(struct drm_connector *connector)
8a51a33b RK	189	{
34ea3d38	190	drm_connector_unregister(connector);
8a51a33b RK	191	drm_connector_cleanup(connector);
	192	}
	193	EXPORT_SYMBOL_GPL(imx_drm_connector_destroy);
	194
	195	void imx_drm_encoder_destroy(struct drm_encoder *encoder)
	196	{
	197	drm_encoder_cleanup(encoder);
	198	}
	199	EXPORT_SYMBOL_GPL(imx_drm_encoder_destroy);
	200
3e68439b RK	201	static void imx_drm_output_poll_changed(struct drm_device *drm)
3e68439b RK	202	{
3e68439b RK	203	struct imx_drm_device *imxdrm = drm->dev_private;
	204
	205	drm_fbdev_cma_hotplug_event(imxdrm->fbhelper);
3e68439b RK	206	}
3e68439b RK	207
7ae847dd	208	static const struct drm_mode_config_funcs imx_drm_mode_config_funcs = {
1df8b530	209	.fb_create = drm_fb_cma_create,
3e68439b	210	.output_poll_changed = imx_drm_output_poll_changed,
1df8b530 RK	211	};
1df8b530 RK	212
e692da4d	213	/*
17b5001b RK	214	* Main DRM initialisation. This binds, initialises and registers
17b5001b RK	215	* with DRM the subcomponents of the driver.
e692da4d SH	216	*/
	217	static int imx_drm_driver_load(struct drm_device *drm, unsigned long flags)
	218	{
b85f2b5d	219	struct imx_drm_device *imxdrm;
e355e7dd	220	struct drm_connector *connector;
e692da4d SH	221	int ret;
e692da4d SH	222
b85f2b5d RK	223	imxdrm = devm_kzalloc(drm->dev, sizeof(*imxdrm), GFP_KERNEL);
	224	if (!imxdrm)
	225	return -ENOMEM;
	226
e692da4d SH	227	imxdrm->drm = drm;
	228
	229	drm->dev_private = imxdrm;
	230
	231	/*
	232	* enable drm irq mode.
4423843c	233	* - with irq_enabled = true, we can use the vblank feature.
e692da4d SH	234	*
	235	* P.S. note that we wouldn't use drm irq handler but
	236	* just specific driver own one instead because
	237	* drm framework supports only one irq handler and
	238	* drivers can well take care of their interrupts
	239	*/
4423843c	240	drm->irq_enabled = true;
e692da4d	241
1df8b530 RK	242	/*
	243	* set max width and height as default value(4096x4096).
	244	* this value would be used to check framebuffer size limitation
	245	* at drm_mode_addfb().
	246	*/
	247	drm->mode_config.min_width = 64;
	248	drm->mode_config.min_height = 64;
	249	drm->mode_config.max_width = 4096;
	250	drm->mode_config.max_height = 4096;
	251	drm->mode_config.funcs = &imx_drm_mode_config_funcs;
	252
e692da4d	253	drm_mode_config_init(drm);
e692da4d	254
020a9ea7	255	ret = drm_vblank_init(drm, MAX_CRTC);
e692da4d	256	if (ret)
8007875f	257	goto err_kms;
e692da4d	258
a72f8bee	259	platform_set_drvdata(drm->platformdev, drm);
8d71de61	260
17b5001b RK	261	/* Now try and bind all our sub-components */
	262	ret = component_bind_all(drm->dev, drm);
	263	if (ret)
ccec7f62	264	goto err_vblank;
e355e7dd RK	265
	266	/*
	267	* All components are now added, we can publish the connector sysfs
	268	* entries to userspace. This will generate hotplug events and so
	269	* userspace will expect to be able to access DRM at this point.
	270	*/
	271	list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
34ea3d38	272	ret = drm_connector_register(connector);
e355e7dd RK	273	if (ret) {
e355e7dd RK	274	dev_err(drm->dev,
34ea3d38	275	"[CONNECTOR:%d:%s] drm_connector_register failed: %d\n",
e355e7dd	276	connector->base.id,
4a2a450f	277	connector->name, ret);
e355e7dd RK	278	goto err_unbind;
	279	}
	280	}
	281
8acba02f RK	282	/*
	283	* All components are now initialised, so setup the fb helper.
	284	* The fb helper takes copies of key hardware information, so the
	285	* crtcs/connectors/encoders must not change after this point.
	286	*/
c1ff5a7a	287	#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
8acba02f RK	288	if (legacyfb_depth != 16 && legacyfb_depth != 32) {
	289	dev_warn(drm->dev, "Invalid legacyfb_depth. Defaulting to 16bpp\n");
	290	legacyfb_depth = 16;
	291	}
4314e19e	292	drm_helper_disable_unused_functions(drm);
8acba02f RK	293	imxdrm->fbhelper = drm_fbdev_cma_init(drm, legacyfb_depth,
	294	drm->mode_config.num_crtc, MAX_CRTC);
	295	if (IS_ERR(imxdrm->fbhelper)) {
	296	ret = PTR_ERR(imxdrm->fbhelper);
	297	imxdrm->fbhelper = NULL;
	298	goto err_unbind;
	299	}
	300	#endif
3e68439b RK	301
	302	drm_kms_helper_poll_init(drm);
	303
8007875f	304	return 0;
a72f8bee	305
e355e7dd RK	306	err_unbind:
e355e7dd RK	307	component_unbind_all(drm->dev, drm);
ccec7f62	308	err_vblank:
8007875f RK	309	drm_vblank_cleanup(drm);
8007875f RK	310	err_kms:
8007875f	311	drm_mode_config_cleanup(drm);
e692da4d SH	312
	313	return ret;
	314	}
	315
e692da4d SH	316	/*
e692da4d SH	317	* imx_drm_add_crtc - add a new crtc
e692da4d	318	*/
32266b45	319	int imx_drm_add_crtc(struct drm_device drm, struct drm_crtc crtc,
43895599	320	struct imx_drm_crtc *new_crtc, struct drm_plane primary_plane,
e692da4d	321	const struct imx_drm_crtc_helper_funcs *imx_drm_helper_funcs,
655b43cc	322	struct device_node *port)
e692da4d	323	{
32266b45	324	struct imx_drm_device *imxdrm = drm->dev_private;
e692da4d	325	struct imx_drm_crtc *imx_drm_crtc;
e692da4d	326
fd6040ed RK	327	/*
	328	* The vblank arrays are dimensioned by MAX_CRTC - we can't
	329	* pass IDs greater than this to those functions.
	330	*/
e7d6231e RK	331	if (imxdrm->pipes >= MAX_CRTC)
e7d6231e RK	332	return -EINVAL;
fd6040ed	333
e7d6231e RK	334	if (imxdrm->drm->open_count)
e7d6231e RK	335	return -EBUSY;
e692da4d SH	336
e692da4d SH	337	imx_drm_crtc = kzalloc(sizeof(*imx_drm_crtc), GFP_KERNEL);
e7d6231e RK	338	if (!imx_drm_crtc)
e7d6231e RK	339	return -ENOMEM;
e692da4d SH	340
e692da4d SH	341	imx_drm_crtc->imx_drm_helper_funcs = *imx_drm_helper_funcs;
e692da4d	342	imx_drm_crtc->crtc = crtc;
e692da4d	343
6457b971 RK	344	crtc->port = port;
6457b971 RK	345
d4b20e4d	346	imxdrm->crtc[imxdrm->pipes++] = imx_drm_crtc;
e692da4d SH	347
	348	*new_crtc = imx_drm_crtc;
	349
ec9557d7 RK	350	drm_crtc_helper_add(crtc,
	351	imx_drm_crtc->imx_drm_helper_funcs.crtc_helper_funcs);
	352
43895599	353	drm_crtc_init_with_planes(drm, crtc, primary_plane, NULL,
f9882876	354	imx_drm_crtc->imx_drm_helper_funcs.crtc_funcs, NULL);
ec9557d7	355
e692da4d	356	return 0;
e692da4d SH	357	}
	358	EXPORT_SYMBOL_GPL(imx_drm_add_crtc);
	359
	360	/*
	361	* imx_drm_remove_crtc - remove a crtc
	362	*/
	363	int imx_drm_remove_crtc(struct imx_drm_crtc *imx_drm_crtc)
	364	{
ccec7f62	365	struct imx_drm_device *imxdrm = imx_drm_crtc->crtc->dev->dev_private;
d4b20e4d	366	unsigned int pipe = drm_crtc_index(imx_drm_crtc->crtc);
e692da4d SH	367
	368	drm_crtc_cleanup(imx_drm_crtc->crtc);
	369
d4b20e4d	370	imxdrm->crtc[pipe] = NULL;
e692da4d	371
e692da4d SH	372	kfree(imx_drm_crtc);
	373
	374	return 0;
	375	}
	376	EXPORT_SYMBOL_GPL(imx_drm_remove_crtc);
	377
6457b971 RK	378	int imx_drm_encoder_parse_of(struct drm_device *drm,
6457b971 RK	379	struct drm_encoder encoder, struct device_node np)
9e2d410d	380	{
6457b971	381	uint32_t crtc_mask = drm_of_find_possible_crtcs(drm, np);
9e2d410d	382
6457b971 RK	383	/*
	384	* If we failed to find the CRTC(s) which this encoder is
	385	* supposed to be connected to, it's because the CRTC has
	386	* not been registered yet. Defer probing, and hope that
	387	* the required CRTC is added later.
	388	*/
	389	if (crtc_mask == 0)
	390	return -EPROBE_DEFER;
655b43cc	391
6457b971	392	encoder->possible_crtcs = crtc_mask;
63bc5164	393
6457b971 RK	394	/* FIXME: this is the mask of outputs which can clone this output. */
6457b971 RK	395	encoder->possible_clones = ~0;
9e2d410d RK	396
	397	return 0;
	398	}
6457b971	399	EXPORT_SYMBOL_GPL(imx_drm_encoder_parse_of);
9e2d410d	400
baa70943	401	static const struct drm_ioctl_desc imx_drm_ioctls[] = {
e692da4d SH	402	/* none so far */
	403	};
	404
	405	static struct drm_driver imx_drm_driver = {
bd3665c9	406	.driver_features = DRIVER_MODESET \| DRIVER_GEM \| DRIVER_PRIME,
e692da4d SH	407	.load = imx_drm_driver_load,
e692da4d SH	408	.unload = imx_drm_driver_unload,
e692da4d	409	.lastclose = imx_drm_driver_lastclose,
915b4d11	410	.set_busid = drm_platform_set_busid,
4b193663	411	.gem_free_object_unlocked = drm_gem_cma_free_object,
e692da4d SH	412	.gem_vm_ops = &drm_gem_cma_vm_ops,
	413	.dumb_create = drm_gem_cma_dumb_create,
	414	.dumb_map_offset = drm_gem_cma_dumb_map_offset,
43387b37	415	.dumb_destroy = drm_gem_dumb_destroy,
e692da4d	416
bd3665c9 PZ	417	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
	418	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
	419	.gem_prime_import = drm_gem_prime_import,
	420	.gem_prime_export = drm_gem_prime_export,
	421	.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
	422	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
	423	.gem_prime_vmap = drm_gem_cma_prime_vmap,
	424	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
	425	.gem_prime_mmap = drm_gem_cma_prime_mmap,
b44f8408	426	.get_vblank_counter = drm_vblank_no_hw_counter,
e692da4d SH	427	.enable_vblank = imx_drm_enable_vblank,
	428	.disable_vblank = imx_drm_disable_vblank,
	429	.ioctls = imx_drm_ioctls,
	430	.num_ioctls = ARRAY_SIZE(imx_drm_ioctls),
	431	.fops = &imx_drm_driver_fops,
	432	.name = "imx-drm",
	433	.desc = "i.MX DRM graphics",
	434	.date = "20120507",
	435	.major = 1,
	436	.minor = 0,
	437	.patchlevel = 0,
	438	};
	439
17b5001b RK	440	static int compare_of(struct device dev, void data)
17b5001b RK	441	{
655b43cc	442	struct device_node *np = data;
17b5001b	443
310944d1 PZ	444	/* Special case for DI, dev->of_node may not be set yet */
	445	if (strcmp(dev->driver->name, "imx-ipuv3-crtc") == 0) {
	446	struct ipu_client_platformdata *pdata = dev->platform_data;
	447
	448	return pdata->of_node == np;
	449	}
	450
655b43cc PZ	451	/* Special case for LDB, one device for two channels */
	452	if (of_node_cmp(np->name, "lvds-channel") == 0) {
	453	np = of_get_parent(np);
	454	of_node_put(np);
17b5001b RK	455	}
17b5001b RK	456
655b43cc PZ	457	return dev->of_node == np;
655b43cc PZ	458	}
17b5001b	459
17b5001b RK	460	static int imx_drm_bind(struct device *dev)
	461	{
	462	return drm_platform_init(&imx_drm_driver, to_platform_device(dev));
	463	}
	464
	465	static void imx_drm_unbind(struct device *dev)
	466	{
	467	drm_put_dev(dev_get_drvdata(dev));
	468	}
	469
	470	static const struct component_master_ops imx_drm_ops = {
17b5001b RK	471	.bind = imx_drm_bind,
	472	.unbind = imx_drm_unbind,
	473	};
	474
e692da4d SH	475	static int imx_drm_platform_probe(struct platform_device *pdev)
e692da4d SH	476	{
9cace32f	477	int ret = drm_of_component_probe(&pdev->dev, compare_of, &imx_drm_ops);
655b43cc	478
9cace32f LD	479	if (!ret)
9cace32f LD	480	ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
655b43cc	481
9cace32f	482	return ret;
e692da4d SH	483	}
	484
	485	static int imx_drm_platform_remove(struct platform_device *pdev)
	486	{
17b5001b	487	component_master_del(&pdev->dev, &imx_drm_ops);
e692da4d SH	488	return 0;
	489	}
	490
bfe945c8 SG	491	#ifdef CONFIG_PM_SLEEP
	492	static int imx_drm_suspend(struct device *dev)
	493	{
	494	struct drm_device *drm_dev = dev_get_drvdata(dev);
	495
	496	/* The drm_dev is NULL before .load hook is called */
	497	if (drm_dev == NULL)
	498	return 0;
	499
	500	drm_kms_helper_poll_disable(drm_dev);
	501
	502	return 0;
	503	}
	504
	505	static int imx_drm_resume(struct device *dev)
	506	{
	507	struct drm_device *drm_dev = dev_get_drvdata(dev);
	508
	509	if (drm_dev == NULL)
	510	return 0;
	511
	512	drm_helper_resume_force_mode(drm_dev);
	513	drm_kms_helper_poll_enable(drm_dev);
	514
	515	return 0;
	516	}
	517	#endif
	518
	519	static SIMPLE_DEV_PM_OPS(imx_drm_pm_ops, imx_drm_suspend, imx_drm_resume);
	520
17b5001b	521	static const struct of_device_id imx_drm_dt_ids[] = {
655b43cc	522	{ .compatible = "fsl,imx-display-subsystem", },
17b5001b RK	523	{ /* sentinel */ },
	524	};
	525	MODULE_DEVICE_TABLE(of, imx_drm_dt_ids);
	526
e692da4d SH	527	static struct platform_driver imx_drm_pdrv = {
e692da4d SH	528	.probe = imx_drm_platform_probe,
99c28f10	529	.remove = imx_drm_platform_remove,
e692da4d	530	.driver = {
e692da4d	531	.name = "imx-drm",
bfe945c8	532	.pm = &imx_drm_pm_ops,
17b5001b	533	.of_match_table = imx_drm_dt_ids,
e692da4d SH	534	},
e692da4d SH	535	};
b85f2b5d	536	module_platform_driver(imx_drm_pdrv);
e692da4d SH	537
	538	MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
	539	MODULE_DESCRIPTION("i.MX drm driver core");
	540	MODULE_LICENSE("GPL");