[linux-block.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/dma-buf.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/reservation.h>
#include <drm/drmP.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.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 drm_atomic_state			*state;
};

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

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_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 int imx_drm_atomic_check(struct drm_device *dev,
				struct drm_atomic_state *state)
{
	int ret;

	ret = drm_atomic_helper_check_modeset(dev, state);
	if (ret)
		return ret;

	ret = drm_atomic_helper_check_planes(dev, state);
	if (ret)
		return ret;

	/*
	 * Check modeset again in case crtc_state->mode_changed is
	 * updated in plane's ->atomic_check callback.
	 */
	ret = drm_atomic_helper_check_modeset(dev, state);
	if (ret)
		return ret;

	return ret;
}

static int imx_drm_atomic_commit(struct drm_device *dev,
				 struct drm_atomic_state *state,
				 bool nonblock)
{
	struct drm_plane_state *plane_state;
	struct drm_plane *plane;
	struct dma_buf *dma_buf;
	struct dma_fence *fence;
	int i;

	/*
	 * If the plane fb has an dma-buf attached, fish out the exclusive
	 * fence for the atomic helper to wait on.
	 */
	for_each_plane_in_state(state, plane, plane_state, i) {
		if ((plane->state->fb != plane_state->fb) && plane_state->fb) {
			dma_buf = drm_fb_cma_get_gem_obj(plane_state->fb,
							 0)->base.dma_buf;
			if (!dma_buf)
				continue;
			fence = reservation_object_get_excl_rcu(dma_buf->resv);

			drm_atomic_set_fence_for_plane(plane_state, fence);
		}
	}

	return drm_atomic_helper_commit(dev, state, nonblock);
}

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,
	.atomic_check = imx_drm_atomic_check,
	.atomic_commit = imx_drm_atomic_commit,
};

static void imx_drm_atomic_commit_tail(struct drm_atomic_state *state)
{
	struct drm_device *dev = state->dev;

	drm_atomic_helper_commit_modeset_disables(dev, state);

	drm_atomic_helper_commit_planes(dev, state,
				DRM_PLANE_COMMIT_ACTIVE_ONLY |
				DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET);

	drm_atomic_helper_commit_modeset_enables(dev, state);

	drm_atomic_helper_commit_hw_done(state);

	drm_atomic_helper_wait_for_vblanks(dev, state);

	drm_atomic_helper_cleanup_planes(dev, state);
}

static struct drm_mode_config_helper_funcs imx_drm_mode_config_helpers = {
	.atomic_commit_tail = imx_drm_atomic_commit_tail,
};

/*
 * 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 |
				  DRIVER_ATOMIC,
	.lastclose		= imx_drm_driver_lastclose,
	.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)
{
	struct drm_device *drm;
	struct imx_drm_device *imxdrm;
	int ret;

	drm = drm_dev_alloc(&imx_drm_driver, dev);
	if (IS_ERR(drm))
		return PTR_ERR(drm);

	imxdrm = devm_kzalloc(dev, sizeof(*imxdrm), GFP_KERNEL);
	if (!imxdrm) {
		ret = -ENOMEM;
		goto err_unref;
	}

	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.helper_private = &imx_drm_mode_config_helpers;

	drm_mode_config_init(drm);

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

	dev_set_drvdata(dev, drm);

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

	drm_mode_config_reset(drm);

	/*
	 * 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(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);

	ret = drm_dev_register(drm, 0);
	if (ret)
		goto err_fbhelper;

	return 0;

err_fbhelper:
	drm_kms_helper_poll_fini(drm);
#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
	if (imxdrm->fbhelper)
		drm_fbdev_cma_fini(imxdrm->fbhelper);
err_unbind:
#endif
	component_unbind_all(drm->dev, drm);
err_vblank:
	drm_vblank_cleanup(drm);
err_kms:
	drm_mode_config_cleanup(drm);
err_unref:
	drm_dev_unref(drm);

	return ret;
}

static void imx_drm_unbind(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);
	struct imx_drm_device *imxdrm = drm->dev_private;

	drm_dev_unregister(drm);

	drm_kms_helper_poll_fini(drm);

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

	drm_mode_config_cleanup(drm);

	component_unbind_all(drm->dev, drm);
	dev_set_drvdata(dev, NULL);

	drm_dev_unref(drm);
}

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);
	struct imx_drm_device *imxdrm;

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

	drm_kms_helper_poll_disable(drm_dev);

	imxdrm = drm_dev->dev_private;
	imxdrm->state = drm_atomic_helper_suspend(drm_dev);
	if (IS_ERR(imxdrm->state)) {
		drm_kms_helper_poll_enable(drm_dev);
		return PTR_ERR(imxdrm->state);
	}

	return 0;
}

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

	if (drm_dev == NULL)
		return 0;

	imx_drm = drm_dev->dev_private;
	drm_atomic_helper_resume(drm_dev, imx_drm->state);
	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>
5f2f9115	18	#include <linux/dma-buf.h>
e7d6231e	19	#include <linux/module.h>
e692da4d	20	#include <linux/platform_device.h>
5f2f9115	21	#include <linux/reservation.h>
e692da4d	22	#include <drm/drmP.h>
5f2f9115 LY	23	#include <drm/drm_atomic.h>
5f2f9115 LY	24	#include <drm/drm_atomic_helper.h>
e692da4d SH	25	#include <drm/drm_fb_helper.h>
e692da4d SH	26	#include <drm/drm_crtc_helper.h>
e692da4d SH	27	#include <drm/drm_gem_cma_helper.h>
e692da4d SH	28	#include <drm/drm_fb_cma_helper.h>
3cb9ae4f	29	#include <drm/drm_plane_helper.h>
6457b971	30	#include <drm/drm_of.h>
310944d1	31	#include <video/imx-ipu-v3.h>
e692da4d SH	32
	33	#include "imx-drm.h"
	34
	35	#define MAX_CRTC 4
	36
655b43cc PZ	37	struct imx_drm_component {
	38	struct device_node *of_node;
	39	struct list_head list;
	40	};
	41
e692da4d SH	42	struct imx_drm_device {
e692da4d SH	43	struct drm_device *drm;
887eceac	44	struct imx_drm_crtc *crtc[MAX_CRTC];
d2ab8ad9	45	unsigned int pipes;
e692da4d	46	struct drm_fbdev_cma *fbhelper;
5f2f9115	47	struct drm_atomic_state *state;
e692da4d SH	48	};
	49
	50	struct imx_drm_crtc {
	51	struct drm_crtc *crtc;
e692da4d	52	struct imx_drm_crtc_helper_funcs imx_drm_helper_funcs;
e692da4d SH	53	};
e692da4d SH	54
c1ff5a7a	55	#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
8acba02f RK	56	static int legacyfb_depth = 16;
8acba02f RK	57	module_param(legacyfb_depth, int, 0444);
c1ff5a7a	58	#endif
8acba02f	59
e692da4d SH	60	static void imx_drm_driver_lastclose(struct drm_device *drm)
	61	{
	62	struct imx_drm_device *imxdrm = drm->dev_private;
	63
3f3a7280	64	drm_fbdev_cma_restore_mode(imxdrm->fbhelper);
e692da4d SH	65	}
e692da4d SH	66
88e72717	67	static int imx_drm_enable_vblank(struct drm_device *drm, unsigned int pipe)
e692da4d SH	68	{
e692da4d SH	69	struct imx_drm_device *imxdrm = drm->dev_private;
88e72717	70	struct imx_drm_crtc *imx_drm_crtc = imxdrm->crtc[pipe];
e692da4d SH	71	int ret;
e692da4d SH	72
e692da4d SH	73	if (!imx_drm_crtc)
	74	return -EINVAL;
	75
	76	if (!imx_drm_crtc->imx_drm_helper_funcs.enable_vblank)
	77	return -ENOSYS;
	78
	79	ret = imx_drm_crtc->imx_drm_helper_funcs.enable_vblank(
	80	imx_drm_crtc->crtc);
	81
	82	return ret;
	83	}
	84
88e72717	85	static void imx_drm_disable_vblank(struct drm_device *drm, unsigned int pipe)
e692da4d SH	86	{
e692da4d SH	87	struct imx_drm_device *imxdrm = drm->dev_private;
88e72717	88	struct imx_drm_crtc *imx_drm_crtc = imxdrm->crtc[pipe];
e692da4d	89
e692da4d SH	90	if (!imx_drm_crtc)
	91	return;
	92
	93	if (!imx_drm_crtc->imx_drm_helper_funcs.disable_vblank)
	94	return;
	95
	96	imx_drm_crtc->imx_drm_helper_funcs.disable_vblank(imx_drm_crtc->crtc);
	97	}
	98
	99	static const struct file_operations imx_drm_driver_fops = {
	100	.owner = THIS_MODULE,
	101	.open = drm_open,
	102	.release = drm_release,
	103	.unlocked_ioctl = drm_ioctl,
	104	.mmap = drm_gem_cma_mmap,
	105	.poll = drm_poll,
e692da4d SH	106	.read = drm_read,
	107	.llseek = noop_llseek,
	108	};
	109
8a51a33b RK	110	void imx_drm_connector_destroy(struct drm_connector *connector)
8a51a33b RK	111	{
34ea3d38	112	drm_connector_unregister(connector);
8a51a33b RK	113	drm_connector_cleanup(connector);
	114	}
	115	EXPORT_SYMBOL_GPL(imx_drm_connector_destroy);
	116
	117	void imx_drm_encoder_destroy(struct drm_encoder *encoder)
	118	{
	119	drm_encoder_cleanup(encoder);
	120	}
	121	EXPORT_SYMBOL_GPL(imx_drm_encoder_destroy);
	122
3e68439b RK	123	static void imx_drm_output_poll_changed(struct drm_device *drm)
3e68439b RK	124	{
3e68439b RK	125	struct imx_drm_device *imxdrm = drm->dev_private;
	126
	127	drm_fbdev_cma_hotplug_event(imxdrm->fbhelper);
3e68439b RK	128	}
3e68439b RK	129
1780999c LY	130	static int imx_drm_atomic_check(struct drm_device *dev,
	131	struct drm_atomic_state *state)
	132	{
	133	int ret;
	134
	135	ret = drm_atomic_helper_check_modeset(dev, state);
	136	if (ret)
	137	return ret;
	138
	139	ret = drm_atomic_helper_check_planes(dev, state);
	140	if (ret)
	141	return ret;
	142
	143	/*
	144	* Check modeset again in case crtc_state->mode_changed is
	145	* updated in plane's ->atomic_check callback.
	146	*/
	147	ret = drm_atomic_helper_check_modeset(dev, state);
	148	if (ret)
	149	return ret;
	150
	151	return ret;
	152	}
	153
a40e65b7 LS	154	static int imx_drm_atomic_commit(struct drm_device *dev,
	155	struct drm_atomic_state *state,
	156	bool nonblock)
	157	{
	158	struct drm_plane_state *plane_state;
	159	struct drm_plane *plane;
	160	struct dma_buf *dma_buf;
aee25864	161	struct dma_fence *fence;
a40e65b7 LS	162	int i;
	163
	164	/*
	165	* If the plane fb has an dma-buf attached, fish out the exclusive
	166	* fence for the atomic helper to wait on.
	167	*/
	168	for_each_plane_in_state(state, plane, plane_state, i) {
	169	if ((plane->state->fb != plane_state->fb) && plane_state->fb) {
	170	dma_buf = drm_fb_cma_get_gem_obj(plane_state->fb,
	171	0)->base.dma_buf;
	172	if (!dma_buf)
	173	continue;
aee25864 GP	174	fence = reservation_object_get_excl_rcu(dma_buf->resv);
	175
	176	drm_atomic_set_fence_for_plane(plane_state, fence);
a40e65b7 LS	177	}
	178	}
	179
	180	return drm_atomic_helper_commit(dev, state, nonblock);
	181	}
	182
7ae847dd	183	static const struct drm_mode_config_funcs imx_drm_mode_config_funcs = {
1df8b530	184	.fb_create = drm_fb_cma_create,
3e68439b	185	.output_poll_changed = imx_drm_output_poll_changed,
1780999c	186	.atomic_check = imx_drm_atomic_check,
a40e65b7	187	.atomic_commit = imx_drm_atomic_commit,
5f2f9115 LY	188	};
	189
	190	static void imx_drm_atomic_commit_tail(struct drm_atomic_state *state)
	191	{
	192	struct drm_device *dev = state->dev;
5f2f9115 LY	193
	194	drm_atomic_helper_commit_modeset_disables(dev, state);
	195
2b58e98d	196	drm_atomic_helper_commit_planes(dev, state,
5f4df0c7 LY	197	DRM_PLANE_COMMIT_ACTIVE_ONLY \|
5f4df0c7 LY	198	DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET);
5f2f9115 LY	199
	200	drm_atomic_helper_commit_modeset_enables(dev, state);
	201
	202	drm_atomic_helper_commit_hw_done(state);
	203
	204	drm_atomic_helper_wait_for_vblanks(dev, state);
	205
	206	drm_atomic_helper_cleanup_planes(dev, state);
	207	}
	208
	209	static struct drm_mode_config_helper_funcs imx_drm_mode_config_helpers = {
	210	.atomic_commit_tail = imx_drm_atomic_commit_tail,
1df8b530 RK	211	};
1df8b530 RK	212
e692da4d SH	213	/*
e692da4d SH	214	* imx_drm_add_crtc - add a new crtc
e692da4d	215	*/
32266b45	216	int imx_drm_add_crtc(struct drm_device drm, struct drm_crtc crtc,
43895599	217	struct imx_drm_crtc *new_crtc, struct drm_plane primary_plane,
e692da4d	218	const struct imx_drm_crtc_helper_funcs *imx_drm_helper_funcs,
655b43cc	219	struct device_node *port)
e692da4d	220	{
32266b45	221	struct imx_drm_device *imxdrm = drm->dev_private;
e692da4d	222	struct imx_drm_crtc *imx_drm_crtc;
e692da4d	223
fd6040ed RK	224	/*
	225	* The vblank arrays are dimensioned by MAX_CRTC - we can't
	226	* pass IDs greater than this to those functions.
	227	*/
e7d6231e RK	228	if (imxdrm->pipes >= MAX_CRTC)
e7d6231e RK	229	return -EINVAL;
fd6040ed	230
e7d6231e RK	231	if (imxdrm->drm->open_count)
e7d6231e RK	232	return -EBUSY;
e692da4d SH	233
e692da4d SH	234	imx_drm_crtc = kzalloc(sizeof(*imx_drm_crtc), GFP_KERNEL);
e7d6231e RK	235	if (!imx_drm_crtc)
e7d6231e RK	236	return -ENOMEM;
e692da4d SH	237
e692da4d SH	238	imx_drm_crtc->imx_drm_helper_funcs = *imx_drm_helper_funcs;
e692da4d	239	imx_drm_crtc->crtc = crtc;
e692da4d	240
6457b971 RK	241	crtc->port = port;
6457b971 RK	242
d4b20e4d	243	imxdrm->crtc[imxdrm->pipes++] = imx_drm_crtc;
e692da4d SH	244
	245	*new_crtc = imx_drm_crtc;
	246
ec9557d7 RK	247	drm_crtc_helper_add(crtc,
	248	imx_drm_crtc->imx_drm_helper_funcs.crtc_helper_funcs);
	249
43895599	250	drm_crtc_init_with_planes(drm, crtc, primary_plane, NULL,
f9882876	251	imx_drm_crtc->imx_drm_helper_funcs.crtc_funcs, NULL);
ec9557d7	252
e692da4d	253	return 0;
e692da4d SH	254	}
	255	EXPORT_SYMBOL_GPL(imx_drm_add_crtc);
	256
	257	/*
	258	* imx_drm_remove_crtc - remove a crtc
	259	*/
	260	int imx_drm_remove_crtc(struct imx_drm_crtc *imx_drm_crtc)
	261	{
ccec7f62	262	struct imx_drm_device *imxdrm = imx_drm_crtc->crtc->dev->dev_private;
d4b20e4d	263	unsigned int pipe = drm_crtc_index(imx_drm_crtc->crtc);
e692da4d SH	264
	265	drm_crtc_cleanup(imx_drm_crtc->crtc);
	266
d4b20e4d	267	imxdrm->crtc[pipe] = NULL;
e692da4d	268
e692da4d SH	269	kfree(imx_drm_crtc);
	270
	271	return 0;
	272	}
	273	EXPORT_SYMBOL_GPL(imx_drm_remove_crtc);
	274
6457b971 RK	275	int imx_drm_encoder_parse_of(struct drm_device *drm,
6457b971 RK	276	struct drm_encoder encoder, struct device_node np)
9e2d410d	277	{
6457b971	278	uint32_t crtc_mask = drm_of_find_possible_crtcs(drm, np);
9e2d410d	279
6457b971 RK	280	/*
	281	* If we failed to find the CRTC(s) which this encoder is
	282	* supposed to be connected to, it's because the CRTC has
	283	* not been registered yet. Defer probing, and hope that
	284	* the required CRTC is added later.
	285	*/
	286	if (crtc_mask == 0)
	287	return -EPROBE_DEFER;
655b43cc	288
6457b971	289	encoder->possible_crtcs = crtc_mask;
63bc5164	290
6457b971 RK	291	/* FIXME: this is the mask of outputs which can clone this output. */
6457b971 RK	292	encoder->possible_clones = ~0;
9e2d410d RK	293
	294	return 0;
	295	}
6457b971	296	EXPORT_SYMBOL_GPL(imx_drm_encoder_parse_of);
9e2d410d	297
baa70943	298	static const struct drm_ioctl_desc imx_drm_ioctls[] = {
e692da4d SH	299	/* none so far */
	300	};
	301
	302	static struct drm_driver imx_drm_driver = {
8535c022 LY	303	.driver_features = DRIVER_MODESET \| DRIVER_GEM \| DRIVER_PRIME \|
8535c022 LY	304	DRIVER_ATOMIC,
e692da4d	305	.lastclose = imx_drm_driver_lastclose,
4b193663	306	.gem_free_object_unlocked = drm_gem_cma_free_object,
e692da4d SH	307	.gem_vm_ops = &drm_gem_cma_vm_ops,
	308	.dumb_create = drm_gem_cma_dumb_create,
	309	.dumb_map_offset = drm_gem_cma_dumb_map_offset,
43387b37	310	.dumb_destroy = drm_gem_dumb_destroy,
e692da4d	311
bd3665c9 PZ	312	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
	313	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
	314	.gem_prime_import = drm_gem_prime_import,
	315	.gem_prime_export = drm_gem_prime_export,
	316	.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
	317	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
	318	.gem_prime_vmap = drm_gem_cma_prime_vmap,
	319	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
	320	.gem_prime_mmap = drm_gem_cma_prime_mmap,
b44f8408	321	.get_vblank_counter = drm_vblank_no_hw_counter,
e692da4d SH	322	.enable_vblank = imx_drm_enable_vblank,
	323	.disable_vblank = imx_drm_disable_vblank,
	324	.ioctls = imx_drm_ioctls,
	325	.num_ioctls = ARRAY_SIZE(imx_drm_ioctls),
	326	.fops = &imx_drm_driver_fops,
	327	.name = "imx-drm",
	328	.desc = "i.MX DRM graphics",
	329	.date = "20120507",
	330	.major = 1,
	331	.minor = 0,
	332	.patchlevel = 0,
	333	};
	334
17b5001b RK	335	static int compare_of(struct device dev, void data)
17b5001b RK	336	{
655b43cc	337	struct device_node *np = data;
17b5001b	338
310944d1 PZ	339	/* Special case for DI, dev->of_node may not be set yet */
	340	if (strcmp(dev->driver->name, "imx-ipuv3-crtc") == 0) {
	341	struct ipu_client_platformdata *pdata = dev->platform_data;
	342
	343	return pdata->of_node == np;
	344	}
	345
655b43cc PZ	346	/* Special case for LDB, one device for two channels */
	347	if (of_node_cmp(np->name, "lvds-channel") == 0) {
	348	np = of_get_parent(np);
	349	of_node_put(np);
17b5001b RK	350	}
17b5001b RK	351
655b43cc PZ	352	return dev->of_node == np;
655b43cc PZ	353	}
17b5001b	354
17b5001b RK	355	static int imx_drm_bind(struct device *dev)
17b5001b RK	356	{
54db5dec LS	357	struct drm_device *drm;
	358	struct imx_drm_device *imxdrm;
	359	int ret;
	360
	361	drm = drm_dev_alloc(&imx_drm_driver, dev);
8cca3548 DC	362	if (IS_ERR(drm))
8cca3548 DC	363	return PTR_ERR(drm);
54db5dec LS	364
	365	imxdrm = devm_kzalloc(dev, sizeof(*imxdrm), GFP_KERNEL);
	366	if (!imxdrm) {
	367	ret = -ENOMEM;
	368	goto err_unref;
	369	}
	370
	371	imxdrm->drm = drm;
	372	drm->dev_private = imxdrm;
	373
	374	/*
	375	* enable drm irq mode.
	376	* - with irq_enabled = true, we can use the vblank feature.
	377	*
	378	* P.S. note that we wouldn't use drm irq handler but
	379	* just specific driver own one instead because
	380	* drm framework supports only one irq handler and
	381	* drivers can well take care of their interrupts
	382	*/
	383	drm->irq_enabled = true;
	384
	385	/*
	386	* set max width and height as default value(4096x4096).
	387	* this value would be used to check framebuffer size limitation
	388	* at drm_mode_addfb().
	389	*/
	390	drm->mode_config.min_width = 64;
	391	drm->mode_config.min_height = 64;
	392	drm->mode_config.max_width = 4096;
	393	drm->mode_config.max_height = 4096;
	394	drm->mode_config.funcs = &imx_drm_mode_config_funcs;
	395	drm->mode_config.helper_private = &imx_drm_mode_config_helpers;
	396
	397	drm_mode_config_init(drm);
	398
	399	ret = drm_vblank_init(drm, MAX_CRTC);
	400	if (ret)
	401	goto err_kms;
	402
	403	dev_set_drvdata(dev, drm);
	404
	405	/* Now try and bind all our sub-components */
	406	ret = component_bind_all(dev, drm);
	407	if (ret)
	408	goto err_vblank;
	409
	410	drm_mode_config_reset(drm);
	411
	412	/*
	413	* All components are now initialised, so setup the fb helper.
	414	* The fb helper takes copies of key hardware information, so the
	415	* crtcs/connectors/encoders must not change after this point.
	416	*/
	417	#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
	418	if (legacyfb_depth != 16 && legacyfb_depth != 32) {
	419	dev_warn(dev, "Invalid legacyfb_depth. Defaulting to 16bpp\n");
	420	legacyfb_depth = 16;
	421	}
	422	imxdrm->fbhelper = drm_fbdev_cma_init(drm, legacyfb_depth,
	423	drm->mode_config.num_crtc, MAX_CRTC);
	424	if (IS_ERR(imxdrm->fbhelper)) {
	425	ret = PTR_ERR(imxdrm->fbhelper);
	426	imxdrm->fbhelper = NULL;
	427	goto err_unbind;
428	}
429	#endif
430
431	drm_kms_helper_poll_init(drm);
432
433	ret = drm_dev_register(drm, 0);
434	if (ret)
435	goto err_fbhelper;
436
437	return 0;
438
439	err_fbhelper:
440	drm_kms_helper_poll_fini(drm);
3e3affe5	441	#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
54db5dec LS	442	if (imxdrm->fbhelper)
	443	drm_fbdev_cma_fini(imxdrm->fbhelper);
	444	err_unbind:
3e3affe5	445	#endif
54db5dec LS	446	component_unbind_all(drm->dev, drm);
	447	err_vblank:
	448	drm_vblank_cleanup(drm);
	449	err_kms:
	450	drm_mode_config_cleanup(drm);
	451	err_unref:
	452	drm_dev_unref(drm);
	453
	454	return ret;
17b5001b RK	455	}
	456
	457	static void imx_drm_unbind(struct device *dev)
	458	{
54db5dec LS	459	struct drm_device *drm = dev_get_drvdata(dev);
	460	struct imx_drm_device *imxdrm = drm->dev_private;
	461
	462	drm_dev_unregister(drm);
	463
	464	drm_kms_helper_poll_fini(drm);
	465
	466	if (imxdrm->fbhelper)
	467	drm_fbdev_cma_fini(imxdrm->fbhelper);
	468
8e3b16e2 LS	469	drm_mode_config_cleanup(drm);
8e3b16e2 LS	470
54db5dec LS	471	component_unbind_all(drm->dev, drm);
	472	dev_set_drvdata(dev, NULL);
	473
54db5dec	474	drm_dev_unref(drm);
17b5001b RK	475	}
	476
	477	static const struct component_master_ops imx_drm_ops = {
17b5001b RK	478	.bind = imx_drm_bind,
	479	.unbind = imx_drm_unbind,
	480	};
	481
e692da4d SH	482	static int imx_drm_platform_probe(struct platform_device *pdev)
e692da4d SH	483	{
9cace32f	484	int ret = drm_of_component_probe(&pdev->dev, compare_of, &imx_drm_ops);
655b43cc	485
9cace32f LD	486	if (!ret)
9cace32f LD	487	ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
655b43cc	488
9cace32f	489	return ret;
e692da4d SH	490	}
	491
	492	static int imx_drm_platform_remove(struct platform_device *pdev)
	493	{
17b5001b	494	component_master_del(&pdev->dev, &imx_drm_ops);
e692da4d SH	495	return 0;
	496	}
	497
bfe945c8 SG	498	#ifdef CONFIG_PM_SLEEP
	499	static int imx_drm_suspend(struct device *dev)
	500	{
	501	struct drm_device *drm_dev = dev_get_drvdata(dev);
5f2f9115	502	struct imx_drm_device *imxdrm;
bfe945c8 SG	503
	504	/* The drm_dev is NULL before .load hook is called */
	505	if (drm_dev == NULL)
	506	return 0;
	507
	508	drm_kms_helper_poll_disable(drm_dev);
	509
5f2f9115 LY	510	imxdrm = drm_dev->dev_private;
	511	imxdrm->state = drm_atomic_helper_suspend(drm_dev);
	512	if (IS_ERR(imxdrm->state)) {
	513	drm_kms_helper_poll_enable(drm_dev);
	514	return PTR_ERR(imxdrm->state);
	515	}
	516
bfe945c8 SG	517	return 0;
	518	}
	519
	520	static int imx_drm_resume(struct device *dev)
	521	{
	522	struct drm_device *drm_dev = dev_get_drvdata(dev);
5f2f9115	523	struct imx_drm_device *imx_drm;
bfe945c8 SG	524
	525	if (drm_dev == NULL)
	526	return 0;
	527
5f2f9115 LY	528	imx_drm = drm_dev->dev_private;
5f2f9115 LY	529	drm_atomic_helper_resume(drm_dev, imx_drm->state);
bfe945c8 SG	530	drm_kms_helper_poll_enable(drm_dev);
	531
	532	return 0;
	533	}
	534	#endif
	535
	536	static SIMPLE_DEV_PM_OPS(imx_drm_pm_ops, imx_drm_suspend, imx_drm_resume);
	537
17b5001b	538	static const struct of_device_id imx_drm_dt_ids[] = {
655b43cc	539	{ .compatible = "fsl,imx-display-subsystem", },
17b5001b RK	540	{ /* sentinel */ },
	541	};
	542	MODULE_DEVICE_TABLE(of, imx_drm_dt_ids);
	543
e692da4d SH	544	static struct platform_driver imx_drm_pdrv = {
e692da4d SH	545	.probe = imx_drm_platform_probe,
99c28f10	546	.remove = imx_drm_platform_remove,
e692da4d	547	.driver = {
e692da4d	548	.name = "imx-drm",
bfe945c8	549	.pm = &imx_drm_pm_ops,
17b5001b	550	.of_match_table = imx_drm_dt_ids,
e692da4d SH	551	},
e692da4d SH	552	};
b85f2b5d	553	module_platform_driver(imx_drm_pdrv);
e692da4d SH	554
	555	MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
	556	MODULE_DESCRIPTION("i.MX drm driver core");
	557	MODULE_LICENSE("GPL");