[mirror_ubuntu-artful-kernel.git] / drivers / staging / imx-drm / 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 "imx-drm.h"

#define MAX_CRTC	4

struct imx_drm_crtc;

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

struct imx_drm_crtc {
	struct drm_crtc				*crtc;
	int					pipe;
	struct imx_drm_crtc_helper_funcs	imx_drm_helper_funcs;
	void					*cookie;
	int					id;
	int					mux_id;
};

static int legacyfb_depth = 16;
module_param(legacyfb_depth, int, 0444);

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

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

	if (imxdrm->fbhelper)
		drm_fbdev_cma_restore_mode(imxdrm->fbhelper);
#endif
}

static int imx_drm_driver_unload(struct drm_device *drm)
{
#if IS_ENABLED(CONFIG_DRM_IMX_FB_HELPER)
	struct imx_drm_device *imxdrm = drm->dev_private;
#endif

	drm_kms_helper_poll_fini(drm);

#if IS_ENABLED(CONFIG_DRM_IMX_FB_HELPER)
	if (imxdrm->fbhelper)
		drm_fbdev_cma_fini(imxdrm->fbhelper);
#endif

	component_unbind_all(drm->dev, drm);

	drm_vblank_cleanup(drm);
	drm_mode_config_cleanup(drm);

	return 0;
}

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_panel_format_pins(struct drm_encoder *encoder,
		u32 interface_pix_fmt, int hsync_pin, int vsync_pin)
{
	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,
				encoder->encoder_type, interface_pix_fmt,
				hsync_pin, vsync_pin);
	return 0;
}
EXPORT_SYMBOL_GPL(imx_drm_panel_format_pins);

int imx_drm_panel_format(struct drm_encoder *encoder, u32 interface_pix_fmt)
{
	return imx_drm_panel_format_pins(encoder, interface_pix_fmt, 2, 3);
}
EXPORT_SYMBOL_GPL(imx_drm_panel_format);

int imx_drm_crtc_vblank_get(struct imx_drm_crtc *imx_drm_crtc)
{
	return drm_vblank_get(imx_drm_crtc->crtc->dev, imx_drm_crtc->pipe);
}
EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_get);

void imx_drm_crtc_vblank_put(struct imx_drm_crtc *imx_drm_crtc)
{
	drm_vblank_put(imx_drm_crtc->crtc->dev, imx_drm_crtc->pipe);
}
EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_put);

void imx_drm_handle_vblank(struct imx_drm_crtc *imx_drm_crtc)
{
	drm_handle_vblank(imx_drm_crtc->crtc->dev, imx_drm_crtc->pipe);
}
EXPORT_SYMBOL_GPL(imx_drm_handle_vblank);

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

	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 void imx_drm_driver_preclose(struct drm_device *drm,
		struct drm_file *file)
{
	int i;

	if (!file->is_master)
		return;

	for (i = 0; i < MAX_CRTC; i++)
		imx_drm_disable_vblank(drm, i);
}

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,
};

int imx_drm_connector_mode_valid(struct drm_connector *connector,
	struct drm_display_mode *mode)
{
	return MODE_OK;
}
EXPORT_SYMBOL(imx_drm_connector_mode_valid);

void imx_drm_connector_destroy(struct drm_connector *connector)
{
	drm_sysfs_connector_remove(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)
{
#if IS_ENABLED(CONFIG_DRM_IMX_FB_HELPER)
	struct imx_drm_device *imxdrm = drm->dev_private;

	drm_fbdev_cma_hotplug_event(imxdrm->fbhelper);
#endif
}

static 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;

	/*
	 * with vblank_disable_allowed = true, 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->vblank_disable_allowed = true;

	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_sysfs_connector_add(connector);
		if (ret) {
			dev_err(drm->dev,
				"[CONNECTOR:%d:%s] drm_sysfs_connector_add failed: %d\n",
				connector->base.id,
				drm_get_connector_name(connector), 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_IMX_FB_HELPER)
	if (legacyfb_depth != 16 && legacyfb_depth != 32) {
		dev_warn(drm->dev, "Invalid legacyfb_depth.  Defaulting to 16bpp\n");
		legacyfb_depth = 16;
	}
	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
 *
 * The return value if !NULL is a cookie for the caller to pass to
 * imx_drm_remove_crtc later.
 */
int imx_drm_add_crtc(struct drm_device *drm, struct drm_crtc *crtc,
		struct imx_drm_crtc **new_crtc,
		const struct imx_drm_crtc_helper_funcs *imx_drm_helper_funcs,
		void *cookie, int id)
{
	struct imx_drm_device *imxdrm = drm->dev_private;
	struct imx_drm_crtc *imx_drm_crtc;
	int ret;

	/*
	 * 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->pipe = imxdrm->pipes++;
	imx_drm_crtc->cookie = cookie;
	imx_drm_crtc->id = id;
	imx_drm_crtc->mux_id = imx_drm_crtc->pipe;
	imx_drm_crtc->crtc = crtc;

	imxdrm->crtc[imx_drm_crtc->pipe] = imx_drm_crtc;

	*new_crtc = imx_drm_crtc;

	ret = drm_mode_crtc_set_gamma_size(imx_drm_crtc->crtc, 256);
	if (ret)
		goto err_register;

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

	drm_crtc_init(drm, crtc,
			imx_drm_crtc->imx_drm_helper_funcs.crtc_funcs);

	return 0;

err_register:
	imxdrm->crtc[imx_drm_crtc->pipe] = NULL;
	kfree(imx_drm_crtc);
	return ret;
}
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;

	drm_crtc_cleanup(imx_drm_crtc->crtc);

	imxdrm->crtc[imx_drm_crtc->pipe] = NULL;

	kfree(imx_drm_crtc);

	return 0;
}
EXPORT_SYMBOL_GPL(imx_drm_remove_crtc);

/*
 * Find the DRM CRTC possible mask for the device node cookie/id.
 *
 * The encoder possible masks are defined by their position in the
 * mode_config crtc_list.  This means that CRTCs must not be added
 * or removed once the DRM device has been fully initialised.
 */
static uint32_t imx_drm_find_crtc_mask(struct imx_drm_device *imxdrm,
	void *cookie, int id)
{
	unsigned i;

	for (i = 0; i < MAX_CRTC; i++) {
		struct imx_drm_crtc *imx_drm_crtc = imxdrm->crtc[i];
		if (imx_drm_crtc && imx_drm_crtc->id == id &&
		    imx_drm_crtc->cookie == cookie)
			return drm_crtc_mask(imx_drm_crtc->crtc);
	}

	return 0;
}

int imx_drm_encoder_parse_of(struct drm_device *drm,
	struct drm_encoder *encoder, struct device_node *np)
{
	struct imx_drm_device *imxdrm = drm->dev_private;
	uint32_t crtc_mask = 0;
	int i, ret = 0;

	for (i = 0; !ret; i++) {
		struct of_phandle_args args;
		uint32_t mask;
		int id;

		ret = of_parse_phandle_with_args(np, "crtcs", "#crtc-cells", i,
						 &args);
		if (ret == -ENOENT)
			break;
		if (ret < 0)
			return ret;

		id = args.args_count > 0 ? args.args[0] : 0;
		mask = imx_drm_find_crtc_mask(imxdrm, args.np, id);
		of_node_put(args.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 (mask == 0)
			return -EPROBE_DEFER;

		crtc_mask |= mask;
	}

	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);

int imx_drm_encoder_get_mux_id(struct drm_encoder *encoder)
{
	struct imx_drm_crtc *imx_crtc = imx_drm_find_crtc(encoder->crtc);

	return imx_crtc ? imx_crtc->mux_id : -EINVAL;
}
EXPORT_SYMBOL_GPL(imx_drm_encoder_get_mux_id);

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,
	.preclose		= imx_drm_driver_preclose,
	.gem_free_object	= 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_count,
	.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_parent_of(struct device *dev, void *data)
{
	struct of_phandle_args *args = data;
	return dev->parent && dev->parent->of_node == args->np;
}

static int compare_of(struct device *dev, void *data)
{
	return dev->of_node == data;
}

static int imx_drm_add_components(struct device *master, struct master *m)
{
	struct device_node *np = master->of_node;
	unsigned i;
	int ret;

	for (i = 0; ; i++) {
		struct of_phandle_args args;

		ret = of_parse_phandle_with_fixed_args(np, "crtcs", 1,
						       i, &args);
		if (ret)
			break;

		ret = component_master_add_child(m, compare_parent_of, &args);
		of_node_put(args.np);

		if (ret)
			return ret;
	}

	for (i = 0; ; i++) {
		struct device_node *node;

		node = of_parse_phandle(np, "connectors", i);
		if (!node)
			break;

		ret = component_master_add_child(m, compare_of, node);
		of_node_put(node);

		if (ret)
			return ret;
	}
	return 0;
}

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 = {
	.add_components = imx_drm_add_components,
	.bind = imx_drm_bind,
	.unbind = imx_drm_unbind,
};

static int imx_drm_platform_probe(struct platform_device *pdev)
{
	int ret;

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

	return component_master_add(&pdev->dev, &imx_drm_ops);
}

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

static const struct of_device_id imx_drm_dt_ids[] = {
	{ .compatible = "fsl,imx-drm", },
	{ /* 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		= {
		.owner	= THIS_MODULE,
		.name	= "imx-drm",
		.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>
	25	#include <drm/drm_fb_cma_helper.h>
	26
	27	#include "imx-drm.h"
	28
	29	#define MAX_CRTC 4
	30
887eceac RK	31	struct imx_drm_crtc;
887eceac RK	32
e692da4d SH	33	struct imx_drm_device {
e692da4d SH	34	struct drm_device *drm;
887eceac	35	struct imx_drm_crtc *crtc[MAX_CRTC];
e692da4d SH	36	int pipes;
	37	struct drm_fbdev_cma *fbhelper;
	38	};
	39
	40	struct imx_drm_crtc {
	41	struct drm_crtc *crtc;
e692da4d SH	42	int pipe;
e692da4d SH	43	struct imx_drm_crtc_helper_funcs imx_drm_helper_funcs;
e7d6231e RK	44	void *cookie;
e7d6231e RK	45	int id;
e76171b0	46	int mux_id;
e692da4d SH	47	};
e692da4d SH	48
8acba02f RK	49	static int legacyfb_depth = 16;
	50	module_param(legacyfb_depth, int, 0444);
	51
b8d181e4 PZ	52	int imx_drm_crtc_id(struct imx_drm_crtc *crtc)
	53	{
	54	return crtc->pipe;
	55	}
9c74360f	56	EXPORT_SYMBOL_GPL(imx_drm_crtc_id);
b8d181e4	57
e692da4d SH	58	static void imx_drm_driver_lastclose(struct drm_device *drm)
e692da4d SH	59	{
8acba02f	60	#if IS_ENABLED(CONFIG_DRM_IMX_FB_HELPER)
e692da4d SH	61	struct imx_drm_device *imxdrm = drm->dev_private;
	62
	63	if (imxdrm->fbhelper)
	64	drm_fbdev_cma_restore_mode(imxdrm->fbhelper);
8acba02f	65	#endif
e692da4d SH	66	}
	67
	68	static int imx_drm_driver_unload(struct drm_device *drm)
	69	{
8acba02f	70	#if IS_ENABLED(CONFIG_DRM_IMX_FB_HELPER)
e692da4d	71	struct imx_drm_device *imxdrm = drm->dev_private;
3e68439b RK	72	#endif
	73
	74	drm_kms_helper_poll_fini(drm);
e692da4d	75
3e68439b	76	#if IS_ENABLED(CONFIG_DRM_IMX_FB_HELPER)
8acba02f RK	77	if (imxdrm->fbhelper)
	78	drm_fbdev_cma_fini(imxdrm->fbhelper);
	79	#endif
	80
17b5001b RK	81	component_unbind_all(drm->dev, drm);
17b5001b RK	82
020a9ea7	83	drm_vblank_cleanup(drm);
020a9ea7	84	drm_mode_config_cleanup(drm);
e692da4d SH	85
	86	return 0;
	87	}
	88
887eceac	89	struct imx_drm_crtc imx_drm_find_crtc(struct drm_crtc crtc)
e692da4d	90	{
32266b45	91	struct imx_drm_device *imxdrm = crtc->dev->dev_private;
887eceac RK	92	unsigned i;
	93
	94	for (i = 0; i < MAX_CRTC; i++)
	95	if (imxdrm->crtc[i] && imxdrm->crtc[i]->crtc == crtc)
	96	return imxdrm->crtc[i];
e692da4d	97
e692da4d SH	98	return NULL;
	99	}
	100
f2d66aad	101	int imx_drm_panel_format_pins(struct drm_encoder *encoder,
2ea42608	102	u32 interface_pix_fmt, int hsync_pin, int vsync_pin)
e692da4d	103	{
e692da4d	104	struct imx_drm_crtc_helper_funcs *helper;
887eceac	105	struct imx_drm_crtc *imx_crtc;
e692da4d	106
f2d66aad	107	imx_crtc = imx_drm_find_crtc(encoder->crtc);
887eceac RK	108	if (!imx_crtc)
887eceac RK	109	return -EINVAL;
e692da4d	110
e692da4d SH	111	helper = &imx_crtc->imx_drm_helper_funcs;
e692da4d SH	112	if (helper->set_interface_pix_fmt)
f2d66aad RK	113	return helper->set_interface_pix_fmt(encoder->crtc,
f2d66aad RK	114	encoder->encoder_type, interface_pix_fmt,
2ea42608	115	hsync_pin, vsync_pin);
e692da4d SH	116	return 0;
e692da4d SH	117	}
f2d66aad	118	EXPORT_SYMBOL_GPL(imx_drm_panel_format_pins);
2ea42608	119
f2d66aad	120	int imx_drm_panel_format(struct drm_encoder *encoder, u32 interface_pix_fmt)
2ea42608	121	{
f2d66aad	122	return imx_drm_panel_format_pins(encoder, interface_pix_fmt, 2, 3);
2ea42608	123	}
f2d66aad	124	EXPORT_SYMBOL_GPL(imx_drm_panel_format);
e692da4d SH	125
	126	int imx_drm_crtc_vblank_get(struct imx_drm_crtc *imx_drm_crtc)
	127	{
b5ea1492	128	return drm_vblank_get(imx_drm_crtc->crtc->dev, imx_drm_crtc->pipe);
e692da4d SH	129	}
	130	EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_get);
	131
	132	void imx_drm_crtc_vblank_put(struct imx_drm_crtc *imx_drm_crtc)
	133	{
b5ea1492	134	drm_vblank_put(imx_drm_crtc->crtc->dev, imx_drm_crtc->pipe);
e692da4d SH	135	}
	136	EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_put);
	137
	138	void imx_drm_handle_vblank(struct imx_drm_crtc *imx_drm_crtc)
	139	{
b5ea1492	140	drm_handle_vblank(imx_drm_crtc->crtc->dev, imx_drm_crtc->pipe);
e692da4d SH	141	}
	142	EXPORT_SYMBOL_GPL(imx_drm_handle_vblank);
	143
	144	static int imx_drm_enable_vblank(struct drm_device *drm, int crtc)
	145	{
	146	struct imx_drm_device *imxdrm = drm->dev_private;
887eceac	147	struct imx_drm_crtc *imx_drm_crtc = imxdrm->crtc[crtc];
e692da4d SH	148	int ret;
e692da4d SH	149
e692da4d SH	150	if (!imx_drm_crtc)
	151	return -EINVAL;
	152
	153	if (!imx_drm_crtc->imx_drm_helper_funcs.enable_vblank)
	154	return -ENOSYS;
	155
	156	ret = imx_drm_crtc->imx_drm_helper_funcs.enable_vblank(
	157	imx_drm_crtc->crtc);
	158
	159	return ret;
	160	}
	161
	162	static void imx_drm_disable_vblank(struct drm_device *drm, int crtc)
	163	{
	164	struct imx_drm_device *imxdrm = drm->dev_private;
887eceac	165	struct imx_drm_crtc *imx_drm_crtc = imxdrm->crtc[crtc];
e692da4d	166
e692da4d SH	167	if (!imx_drm_crtc)
	168	return;
	169
	170	if (!imx_drm_crtc->imx_drm_helper_funcs.disable_vblank)
	171	return;
	172
	173	imx_drm_crtc->imx_drm_helper_funcs.disable_vblank(imx_drm_crtc->crtc);
	174	}
	175
6ee4d7fe SH	176	static void imx_drm_driver_preclose(struct drm_device *drm,
	177	struct drm_file *file)
	178	{
	179	int i;
	180
	181	if (!file->is_master)
	182	return;
	183
942325c8 RK	184	for (i = 0; i < MAX_CRTC; i++)
942325c8 RK	185	imx_drm_disable_vblank(drm, i);
6ee4d7fe SH	186	}
6ee4d7fe SH	187
e692da4d SH	188	static const struct file_operations imx_drm_driver_fops = {
	189	.owner = THIS_MODULE,
	190	.open = drm_open,
	191	.release = drm_release,
	192	.unlocked_ioctl = drm_ioctl,
	193	.mmap = drm_gem_cma_mmap,
	194	.poll = drm_poll,
e692da4d SH	195	.read = drm_read,
	196	.llseek = noop_llseek,
	197	};
	198
baa68c4b RK	199	int imx_drm_connector_mode_valid(struct drm_connector *connector,
	200	struct drm_display_mode *mode)
	201	{
	202	return MODE_OK;
	203	}
	204	EXPORT_SYMBOL(imx_drm_connector_mode_valid);
	205
8a51a33b RK	206	void imx_drm_connector_destroy(struct drm_connector *connector)
	207	{
	208	drm_sysfs_connector_remove(connector);
	209	drm_connector_cleanup(connector);
	210	}
	211	EXPORT_SYMBOL_GPL(imx_drm_connector_destroy);
	212
	213	void imx_drm_encoder_destroy(struct drm_encoder *encoder)
	214	{
	215	drm_encoder_cleanup(encoder);
	216	}
	217	EXPORT_SYMBOL_GPL(imx_drm_encoder_destroy);
	218
3e68439b RK	219	static void imx_drm_output_poll_changed(struct drm_device *drm)
	220	{
	221	#if IS_ENABLED(CONFIG_DRM_IMX_FB_HELPER)
	222	struct imx_drm_device *imxdrm = drm->dev_private;
	223
	224	drm_fbdev_cma_hotplug_event(imxdrm->fbhelper);
	225	#endif
	226	}
	227
1df8b530 RK	228	static struct drm_mode_config_funcs imx_drm_mode_config_funcs = {
1df8b530 RK	229	.fb_create = drm_fb_cma_create,
3e68439b	230	.output_poll_changed = imx_drm_output_poll_changed,
1df8b530 RK	231	};
1df8b530 RK	232
e692da4d	233	/*
17b5001b RK	234	* Main DRM initialisation. This binds, initialises and registers
17b5001b RK	235	* with DRM the subcomponents of the driver.
e692da4d SH	236	*/
	237	static int imx_drm_driver_load(struct drm_device *drm, unsigned long flags)
	238	{
b85f2b5d	239	struct imx_drm_device *imxdrm;
e355e7dd	240	struct drm_connector *connector;
e692da4d SH	241	int ret;
e692da4d SH	242
b85f2b5d RK	243	imxdrm = devm_kzalloc(drm->dev, sizeof(*imxdrm), GFP_KERNEL);
	244	if (!imxdrm)
	245	return -ENOMEM;
	246
e692da4d SH	247	imxdrm->drm = drm;
	248
	249	drm->dev_private = imxdrm;
	250
	251	/*
	252	* enable drm irq mode.
4423843c	253	* - with irq_enabled = true, we can use the vblank feature.
e692da4d SH	254	*
	255	* P.S. note that we wouldn't use drm irq handler but
	256	* just specific driver own one instead because
	257	* drm framework supports only one irq handler and
	258	* drivers can well take care of their interrupts
	259	*/
4423843c	260	drm->irq_enabled = true;
e692da4d	261
1df8b530 RK	262	/*
	263	* set max width and height as default value(4096x4096).
	264	* this value would be used to check framebuffer size limitation
	265	* at drm_mode_addfb().
	266	*/
	267	drm->mode_config.min_width = 64;
	268	drm->mode_config.min_height = 64;
	269	drm->mode_config.max_width = 4096;
	270	drm->mode_config.max_height = 4096;
	271	drm->mode_config.funcs = &imx_drm_mode_config_funcs;
	272
e692da4d	273	drm_mode_config_init(drm);
e692da4d	274
020a9ea7	275	ret = drm_vblank_init(drm, MAX_CRTC);
e692da4d	276	if (ret)
8007875f	277	goto err_kms;
e692da4d SH	278
e692da4d SH	279	/*
e7d6231e RK	280	* with vblank_disable_allowed = true, vblank interrupt will be
	281	* disabled by drm timer once a current process gives up ownership
	282	* of vblank event. (after drm_vblank_put function is called)
e692da4d	283	*/
020a9ea7	284	drm->vblank_disable_allowed = true;
e692da4d	285
a72f8bee	286	platform_set_drvdata(drm->platformdev, drm);
8d71de61	287
17b5001b RK	288	/* Now try and bind all our sub-components */
	289	ret = component_bind_all(drm->dev, drm);
	290	if (ret)
ccec7f62	291	goto err_vblank;
e355e7dd RK	292
	293	/*
	294	* All components are now added, we can publish the connector sysfs
	295	* entries to userspace. This will generate hotplug events and so
	296	* userspace will expect to be able to access DRM at this point.
	297	*/
	298	list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
	299	ret = drm_sysfs_connector_add(connector);
	300	if (ret) {
	301	dev_err(drm->dev,
	302	"[CONNECTOR:%d:%s] drm_sysfs_connector_add failed: %d\n",
	303	connector->base.id,
	304	drm_get_connector_name(connector), ret);
	305	goto err_unbind;
	306	}
	307	}
	308
8acba02f RK	309	/*
	310	* All components are now initialised, so setup the fb helper.
	311	* The fb helper takes copies of key hardware information, so the
	312	* crtcs/connectors/encoders must not change after this point.
	313	*/
	314	#if IS_ENABLED(CONFIG_DRM_IMX_FB_HELPER)
	315	if (legacyfb_depth != 16 && legacyfb_depth != 32) {
	316	dev_warn(drm->dev, "Invalid legacyfb_depth. Defaulting to 16bpp\n");
	317	legacyfb_depth = 16;
	318	}
	319	imxdrm->fbhelper = drm_fbdev_cma_init(drm, legacyfb_depth,
	320	drm->mode_config.num_crtc, MAX_CRTC);
	321	if (IS_ERR(imxdrm->fbhelper)) {
	322	ret = PTR_ERR(imxdrm->fbhelper);
	323	imxdrm->fbhelper = NULL;
	324	goto err_unbind;
	325	}
	326	#endif
3e68439b RK	327
	328	drm_kms_helper_poll_init(drm);
	329
8007875f	330	return 0;
a72f8bee	331
e355e7dd RK	332	err_unbind:
e355e7dd RK	333	component_unbind_all(drm->dev, drm);
ccec7f62	334	err_vblank:
8007875f RK	335	drm_vblank_cleanup(drm);
8007875f RK	336	err_kms:
8007875f	337	drm_mode_config_cleanup(drm);
e692da4d SH	338
	339	return ret;
	340	}
	341
e692da4d SH	342	/*
	343	* imx_drm_add_crtc - add a new crtc
	344	*
	345	* The return value if !NULL is a cookie for the caller to pass to
	346	* imx_drm_remove_crtc later.
	347	*/
32266b45	348	int imx_drm_add_crtc(struct drm_device drm, struct drm_crtc crtc,
e692da4d SH	349	struct imx_drm_crtc **new_crtc,
e692da4d SH	350	const struct imx_drm_crtc_helper_funcs *imx_drm_helper_funcs,
32266b45	351	void *cookie, int id)
e692da4d	352	{
32266b45	353	struct imx_drm_device *imxdrm = drm->dev_private;
e692da4d	354	struct imx_drm_crtc *imx_drm_crtc;
e692da4d SH	355	int ret;
e692da4d SH	356
fd6040ed RK	357	/*
	358	* The vblank arrays are dimensioned by MAX_CRTC - we can't
	359	* pass IDs greater than this to those functions.
	360	*/
e7d6231e RK	361	if (imxdrm->pipes >= MAX_CRTC)
e7d6231e RK	362	return -EINVAL;
fd6040ed	363
e7d6231e RK	364	if (imxdrm->drm->open_count)
e7d6231e RK	365	return -EBUSY;
e692da4d SH	366
e692da4d SH	367	imx_drm_crtc = kzalloc(sizeof(*imx_drm_crtc), GFP_KERNEL);
e7d6231e RK	368	if (!imx_drm_crtc)
e7d6231e RK	369	return -ENOMEM;
e692da4d SH	370
	371	imx_drm_crtc->imx_drm_helper_funcs = *imx_drm_helper_funcs;
	372	imx_drm_crtc->pipe = imxdrm->pipes++;
e7d6231e RK	373	imx_drm_crtc->cookie = cookie;
e7d6231e RK	374	imx_drm_crtc->id = id;
e76171b0	375	imx_drm_crtc->mux_id = imx_drm_crtc->pipe;
e692da4d	376	imx_drm_crtc->crtc = crtc;
e692da4d	377
887eceac	378	imxdrm->crtc[imx_drm_crtc->pipe] = imx_drm_crtc;
e692da4d SH	379
	380	*new_crtc = imx_drm_crtc;
	381
ec9557d7	382	ret = drm_mode_crtc_set_gamma_size(imx_drm_crtc->crtc, 256);
e692da4d SH	383	if (ret)
	384	goto err_register;
	385
ec9557d7 RK	386	drm_crtc_helper_add(crtc,
	387	imx_drm_crtc->imx_drm_helper_funcs.crtc_helper_funcs);
	388
32266b45	389	drm_crtc_init(drm, crtc,
ec9557d7 RK	390	imx_drm_crtc->imx_drm_helper_funcs.crtc_funcs);
ec9557d7 RK	391
e692da4d SH	392	return 0;
	393
	394	err_register:
887eceac	395	imxdrm->crtc[imx_drm_crtc->pipe] = NULL;
e692da4d	396	kfree(imx_drm_crtc);
e692da4d SH	397	return ret;
	398	}
	399	EXPORT_SYMBOL_GPL(imx_drm_add_crtc);
	400
	401	/*
	402	* imx_drm_remove_crtc - remove a crtc
	403	*/
	404	int imx_drm_remove_crtc(struct imx_drm_crtc *imx_drm_crtc)
	405	{
ccec7f62	406	struct imx_drm_device *imxdrm = imx_drm_crtc->crtc->dev->dev_private;
e692da4d SH	407
	408	drm_crtc_cleanup(imx_drm_crtc->crtc);
	409
887eceac	410	imxdrm->crtc[imx_drm_crtc->pipe] = NULL;
e692da4d	411
e692da4d SH	412	kfree(imx_drm_crtc);
	413
	414	return 0;
	415	}
	416	EXPORT_SYMBOL_GPL(imx_drm_remove_crtc);
	417
9e2d410d RK	418	/*
	419	* Find the DRM CRTC possible mask for the device node cookie/id.
	420	*
	421	* The encoder possible masks are defined by their position in the
	422	* mode_config crtc_list. This means that CRTCs must not be added
	423	* or removed once the DRM device has been fully initialised.
	424	*/
	425	static uint32_t imx_drm_find_crtc_mask(struct imx_drm_device *imxdrm,
	426	void *cookie, int id)
	427	{
	428	unsigned i;
	429
	430	for (i = 0; i < MAX_CRTC; i++) {
	431	struct imx_drm_crtc *imx_drm_crtc = imxdrm->crtc[i];
e7d6231e RK	432	if (imx_drm_crtc && imx_drm_crtc->id == id &&
e7d6231e RK	433	imx_drm_crtc->cookie == cookie)
9e2d410d RK	434	return drm_crtc_mask(imx_drm_crtc->crtc);
	435	}
	436
	437	return 0;
	438	}
	439
	440	int imx_drm_encoder_parse_of(struct drm_device *drm,
	441	struct drm_encoder encoder, struct device_node np)
	442	{
	443	struct imx_drm_device *imxdrm = drm->dev_private;
	444	uint32_t crtc_mask = 0;
	445	int i, ret = 0;
	446
	447	for (i = 0; !ret; i++) {
	448	struct of_phandle_args args;
	449	uint32_t mask;
	450	int id;
	451
	452	ret = of_parse_phandle_with_args(np, "crtcs", "#crtc-cells", i,
	453	&args);
	454	if (ret == -ENOENT)
	455	break;
	456	if (ret < 0)
	457	return ret;
	458
	459	id = args.args_count > 0 ? args.args[0] : 0;
	460	mask = imx_drm_find_crtc_mask(imxdrm, args.np, id);
	461	of_node_put(args.np);
	462
	463	/*
	464	* If we failed to find the CRTC(s) which this encoder is
	465	* supposed to be connected to, it's because the CRTC has
	466	* not been registered yet. Defer probing, and hope that
	467	* the required CRTC is added later.
	468	*/
	469	if (mask == 0)
	470	return -EPROBE_DEFER;
	471
	472	crtc_mask \|= mask;
	473	}
	474
	475	encoder->possible_crtcs = crtc_mask;
	476
	477	/* FIXME: this is the mask of outputs which can clone this output. */
	478	encoder->possible_clones = ~0;
	479
	480	return 0;
	481	}
	482	EXPORT_SYMBOL_GPL(imx_drm_encoder_parse_of);
	483
e76171b0	484	int imx_drm_encoder_get_mux_id(struct drm_encoder *encoder)
e692da4d	485	{
887eceac	486	struct imx_drm_crtc *imx_crtc = imx_drm_find_crtc(encoder->crtc);
e692da4d	487
887eceac	488	return imx_crtc ? imx_crtc->mux_id : -EINVAL;
e692da4d	489	}
ea8d1583	490	EXPORT_SYMBOL_GPL(imx_drm_encoder_get_mux_id);
e692da4d	491
baa70943	492	static const struct drm_ioctl_desc imx_drm_ioctls[] = {
e692da4d SH	493	/* none so far */
	494	};
	495
	496	static struct drm_driver imx_drm_driver = {
bd3665c9	497	.driver_features = DRIVER_MODESET \| DRIVER_GEM \| DRIVER_PRIME,
e692da4d SH	498	.load = imx_drm_driver_load,
e692da4d SH	499	.unload = imx_drm_driver_unload,
e692da4d	500	.lastclose = imx_drm_driver_lastclose,
6ee4d7fe	501	.preclose = imx_drm_driver_preclose,
e692da4d SH	502	.gem_free_object = drm_gem_cma_free_object,
	503	.gem_vm_ops = &drm_gem_cma_vm_ops,
	504	.dumb_create = drm_gem_cma_dumb_create,
	505	.dumb_map_offset = drm_gem_cma_dumb_map_offset,
43387b37	506	.dumb_destroy = drm_gem_dumb_destroy,
e692da4d	507
bd3665c9 PZ	508	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
	509	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
	510	.gem_prime_import = drm_gem_prime_import,
	511	.gem_prime_export = drm_gem_prime_export,
	512	.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
	513	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
	514	.gem_prime_vmap = drm_gem_cma_prime_vmap,
	515	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
	516	.gem_prime_mmap = drm_gem_cma_prime_mmap,
e692da4d SH	517	.get_vblank_counter = drm_vblank_count,
	518	.enable_vblank = imx_drm_enable_vblank,
	519	.disable_vblank = imx_drm_disable_vblank,
	520	.ioctls = imx_drm_ioctls,
	521	.num_ioctls = ARRAY_SIZE(imx_drm_ioctls),
	522	.fops = &imx_drm_driver_fops,
	523	.name = "imx-drm",
	524	.desc = "i.MX DRM graphics",
	525	.date = "20120507",
	526	.major = 1,
	527	.minor = 0,
	528	.patchlevel = 0,
	529	};
	530
17b5001b RK	531	static int compare_parent_of(struct device dev, void data)
	532	{
	533	struct of_phandle_args *args = data;
	534	return dev->parent && dev->parent->of_node == args->np;
	535	}
	536
	537	static int compare_of(struct device dev, void data)
	538	{
	539	return dev->of_node == data;
	540	}
	541
	542	static int imx_drm_add_components(struct device master, struct master m)
	543	{
	544	struct device_node *np = master->of_node;
	545	unsigned i;
	546	int ret;
	547
	548	for (i = 0; ; i++) {
	549	struct of_phandle_args args;
	550
	551	ret = of_parse_phandle_with_fixed_args(np, "crtcs", 1,
	552	i, &args);
	553	if (ret)
	554	break;
	555
	556	ret = component_master_add_child(m, compare_parent_of, &args);
	557	of_node_put(args.np);
	558
	559	if (ret)
	560	return ret;
	561	}
	562
	563	for (i = 0; ; i++) {
	564	struct device_node *node;
	565
	566	node = of_parse_phandle(np, "connectors", i);
	567	if (!node)
	568	break;
	569
	570	ret = component_master_add_child(m, compare_of, node);
	571	of_node_put(node);
	572
	573	if (ret)
	574	return ret;
	575	}
	576	return 0;
	577	}
	578
	579	static int imx_drm_bind(struct device *dev)
	580	{
	581	return drm_platform_init(&imx_drm_driver, to_platform_device(dev));
	582	}
	583
	584	static void imx_drm_unbind(struct device *dev)
	585	{
	586	drm_put_dev(dev_get_drvdata(dev));
	587	}
	588
	589	static const struct component_master_ops imx_drm_ops = {
	590	.add_components = imx_drm_add_components,
	591	.bind = imx_drm_bind,
	592	.unbind = imx_drm_unbind,
	593	};
	594
e692da4d SH	595	static int imx_drm_platform_probe(struct platform_device *pdev)
e692da4d SH	596	{
4cdbb4ff RK	597	int ret;
	598
	599	ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
	600	if (ret)
	601	return ret;
	602
17b5001b	603	return component_master_add(&pdev->dev, &imx_drm_ops);
e692da4d SH	604	}
	605
	606	static int imx_drm_platform_remove(struct platform_device *pdev)
	607	{
17b5001b	608	component_master_del(&pdev->dev, &imx_drm_ops);
e692da4d SH	609	return 0;
	610	}
	611
17b5001b RK	612	static const struct of_device_id imx_drm_dt_ids[] = {
	613	{ .compatible = "fsl,imx-drm", },
	614	{ /* sentinel */ },
	615	};
	616	MODULE_DEVICE_TABLE(of, imx_drm_dt_ids);
	617
e692da4d SH	618	static struct platform_driver imx_drm_pdrv = {
e692da4d SH	619	.probe = imx_drm_platform_probe,
99c28f10	620	.remove = imx_drm_platform_remove,
e692da4d SH	621	.driver = {
	622	.owner = THIS_MODULE,
	623	.name = "imx-drm",
17b5001b	624	.of_match_table = imx_drm_dt_ids,
e692da4d SH	625	},
e692da4d SH	626	};
b85f2b5d	627	module_platform_driver(imx_drm_pdrv);
e692da4d SH	628
	629	MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
	630	MODULE_DESCRIPTION("i.MX drm driver core");
	631	MODULE_LICENSE("GPL");