[thirdparty/kernel/stable.git] / drivers / gpu / drm / arc / arcpgu_drv.c

/*
 * ARC PGU DRM driver.
 *
 * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * 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/clk.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_debugfs.h>
#include <drm/drm_device.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_probe_helper.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/of_reserved_mem.h>
#include <linux/platform_device.h>

#include "arcpgu.h"
#include "arcpgu_regs.h"

static const struct drm_mode_config_funcs arcpgu_drm_modecfg_funcs = {
	.fb_create  = drm_gem_fb_create,
	.atomic_check = drm_atomic_helper_check,
	.atomic_commit = drm_atomic_helper_commit,
};

static void arcpgu_setup_mode_config(struct drm_device *drm)
{
	drm_mode_config_init(drm);
	drm->mode_config.min_width = 0;
	drm->mode_config.min_height = 0;
	drm->mode_config.max_width = 1920;
	drm->mode_config.max_height = 1080;
	drm->mode_config.funcs = &arcpgu_drm_modecfg_funcs;
}

DEFINE_DRM_GEM_CMA_FOPS(arcpgu_drm_ops);

static int arcpgu_load(struct drm_device *drm)
{
	struct platform_device *pdev = to_platform_device(drm->dev);
	struct arcpgu_drm_private *arcpgu;
	struct device_node *encoder_node;
	struct resource *res;
	int ret;

	arcpgu = devm_kzalloc(&pdev->dev, sizeof(*arcpgu), GFP_KERNEL);
	if (arcpgu == NULL)
		return -ENOMEM;

	drm->dev_private = arcpgu;

	arcpgu->clk = devm_clk_get(drm->dev, "pxlclk");
	if (IS_ERR(arcpgu->clk))
		return PTR_ERR(arcpgu->clk);

	arcpgu_setup_mode_config(drm);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	arcpgu->regs = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(arcpgu->regs))
		return PTR_ERR(arcpgu->regs);

	dev_info(drm->dev, "arc_pgu ID: 0x%x\n",
		 arc_pgu_read(arcpgu, ARCPGU_REG_ID));

	/* Get the optional framebuffer memory resource */
	ret = of_reserved_mem_device_init(drm->dev);
	if (ret && ret != -ENODEV)
		return ret;

	if (dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32)))
		return -ENODEV;

	if (arc_pgu_setup_crtc(drm) < 0)
		return -ENODEV;

	/* find the encoder node and initialize it */
	encoder_node = of_parse_phandle(drm->dev->of_node, "encoder-slave", 0);
	if (encoder_node) {
		ret = arcpgu_drm_hdmi_init(drm, encoder_node);
		of_node_put(encoder_node);
		if (ret < 0)
			return ret;
	} else {
		ret = arcpgu_drm_sim_init(drm, NULL);
		if (ret < 0)
			return ret;
	}

	drm_mode_config_reset(drm);
	drm_kms_helper_poll_init(drm);

	platform_set_drvdata(pdev, drm);
	return 0;
}

static int arcpgu_unload(struct drm_device *drm)
{
	drm_kms_helper_poll_fini(drm);
	drm_atomic_helper_shutdown(drm);
	drm_mode_config_cleanup(drm);

	return 0;
}

#ifdef CONFIG_DEBUG_FS
static int arcpgu_show_pxlclock(struct seq_file *m, void *arg)
{
	struct drm_info_node *node = (struct drm_info_node *)m->private;
	struct drm_device *drm = node->minor->dev;
	struct arcpgu_drm_private *arcpgu = drm->dev_private;
	unsigned long clkrate = clk_get_rate(arcpgu->clk);
	unsigned long mode_clock = arcpgu->crtc.mode.crtc_clock * 1000;

	seq_printf(m, "hw  : %lu\n", clkrate);
	seq_printf(m, "mode: %lu\n", mode_clock);
	return 0;
}

static struct drm_info_list arcpgu_debugfs_list[] = {
	{ "clocks", arcpgu_show_pxlclock, 0 },
};

static int arcpgu_debugfs_init(struct drm_minor *minor)
{
	return drm_debugfs_create_files(arcpgu_debugfs_list,
		ARRAY_SIZE(arcpgu_debugfs_list), minor->debugfs_root, minor);
}
#endif

static struct drm_driver arcpgu_drm_driver = {
	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
			   DRIVER_ATOMIC,
	.name = "arcpgu",
	.desc = "ARC PGU Controller",
	.date = "20160219",
	.major = 1,
	.minor = 0,
	.patchlevel = 0,
	.fops = &arcpgu_drm_ops,
	.dumb_create = drm_gem_cma_dumb_create,
	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
	.gem_free_object_unlocked = drm_gem_cma_free_object,
	.gem_print_info = drm_gem_cma_print_info,
	.gem_vm_ops = &drm_gem_cma_vm_ops,
	.gem_prime_export = drm_gem_prime_export,
	.gem_prime_import = drm_gem_prime_import,
	.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,
#ifdef CONFIG_DEBUG_FS
	.debugfs_init = arcpgu_debugfs_init,
#endif
};

static int arcpgu_probe(struct platform_device *pdev)
{
	struct drm_device *drm;
	int ret;

	drm = drm_dev_alloc(&arcpgu_drm_driver, &pdev->dev);
	if (IS_ERR(drm))
		return PTR_ERR(drm);

	ret = arcpgu_load(drm);
	if (ret)
		goto err_unref;

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

	drm_fbdev_generic_setup(drm, 16);

	return 0;

err_unload:
	arcpgu_unload(drm);

err_unref:
	drm_dev_put(drm);

	return ret;
}

static int arcpgu_remove(struct platform_device *pdev)
{
	struct drm_device *drm = platform_get_drvdata(pdev);

	drm_dev_unregister(drm);
	arcpgu_unload(drm);
	drm_dev_put(drm);

	return 0;
}

static const struct of_device_id arcpgu_of_table[] = {
	{.compatible = "snps,arcpgu"},
	{}
};

MODULE_DEVICE_TABLE(of, arcpgu_of_table);

static struct platform_driver arcpgu_platform_driver = {
	.probe = arcpgu_probe,
	.remove = arcpgu_remove,
	.driver = {
		   .name = "arcpgu",
		   .of_match_table = arcpgu_of_table,
		   },
};

module_platform_driver(arcpgu_platform_driver);

MODULE_AUTHOR("Carlos Palminha <palminha@synopsys.com>");
MODULE_DESCRIPTION("ARC PGU DRM driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
51dacf20 CP	1	/*
	2	* ARC PGU DRM driver.
	3	*
	4	* Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com)
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*
	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	*/
	16
	17	#include <linux/clk.h>
fcd70cd3	18	#include <drm/drm_atomic_helper.h>
fe1f664a	19	#include <drm/drm_debugfs.h>
fcd70cd3	20	#include <drm/drm_device.h>
fe1f664a	21	#include <drm/drm_drv.h>
51dacf20	22	#include <drm/drm_fb_cma_helper.h>
c638f341	23	#include <drm/drm_fb_helper.h>
51dacf20	24	#include <drm/drm_gem_cma_helper.h>
1cdea74e	25	#include <drm/drm_gem_framebuffer_helper.h>
fcd70cd3	26	#include <drm/drm_probe_helper.h>
fe1f664a SR	27	#include <linux/dma-mapping.h>
fe1f664a SR	28	#include <linux/module.h>
8aeab995	29	#include <linux/of_reserved_mem.h>
fe1f664a	30	#include <linux/platform_device.h>
51dacf20 CP	31
	32	#include "arcpgu.h"
	33	#include "arcpgu_regs.h"
	34
a5cb37d8	35	static const struct drm_mode_config_funcs arcpgu_drm_modecfg_funcs = {
1cdea74e	36	.fb_create = drm_gem_fb_create,
51dacf20	37	.atomic_check = drm_atomic_helper_check,
17b58b23	38	.atomic_commit = drm_atomic_helper_commit,
51dacf20 CP	39	};
	40
	41	static void arcpgu_setup_mode_config(struct drm_device *drm)
	42	{
	43	drm_mode_config_init(drm);
	44	drm->mode_config.min_width = 0;
	45	drm->mode_config.min_height = 0;
	46	drm->mode_config.max_width = 1920;
	47	drm->mode_config.max_height = 1080;
	48	drm->mode_config.funcs = &arcpgu_drm_modecfg_funcs;
	49	}
	50
a8f8fb20	51	DEFINE_DRM_GEM_CMA_FOPS(arcpgu_drm_ops);
51dacf20	52
51dacf20 CP	53	static int arcpgu_load(struct drm_device *drm)
	54	{
	55	struct platform_device *pdev = to_platform_device(drm->dev);
	56	struct arcpgu_drm_private *arcpgu;
	57	struct device_node *encoder_node;
	58	struct resource *res;
	59	int ret;
	60
	61	arcpgu = devm_kzalloc(&pdev->dev, sizeof(*arcpgu), GFP_KERNEL);
	62	if (arcpgu == NULL)
	63	return -ENOMEM;
	64
	65	drm->dev_private = arcpgu;
	66
	67	arcpgu->clk = devm_clk_get(drm->dev, "pxlclk");
	68	if (IS_ERR(arcpgu->clk))
	69	return PTR_ERR(arcpgu->clk);
	70
51dacf20 CP	71	arcpgu_setup_mode_config(drm);
	72
	73	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	74	arcpgu->regs = devm_ioremap_resource(&pdev->dev, res);
7725936e	75	if (IS_ERR(arcpgu->regs))
51dacf20	76	return PTR_ERR(arcpgu->regs);
51dacf20 CP	77
	78	dev_info(drm->dev, "arc_pgu ID: 0x%x\n",
	79	arc_pgu_read(arcpgu, ARCPGU_REG_ID));
	80
8aeab995 AB	81	/* Get the optional framebuffer memory resource */
	82	ret = of_reserved_mem_device_init(drm->dev);
	83	if (ret && ret != -ENODEV)
	84	return ret;
	85
51dacf20 CP	86	if (dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32)))
	87	return -ENODEV;
	88
	89	if (arc_pgu_setup_crtc(drm) < 0)
	90	return -ENODEV;
	91
	92	/* find the encoder node and initialize it */
	93	encoder_node = of_parse_phandle(drm->dev->of_node, "encoder-slave", 0);
a189d28e RD	94	if (encoder_node) {
a189d28e RD	95	ret = arcpgu_drm_hdmi_init(drm, encoder_node);
8e7446c3	96	of_node_put(encoder_node);
a189d28e RD	97	if (ret < 0)
	98	return ret;
	99	} else {
ee29a9ea	100	ret = arcpgu_drm_sim_init(drm, NULL);
a189d28e RD	101	if (ret < 0)
a189d28e RD	102	return ret;
51dacf20 CP	103	}
51dacf20 CP	104
51dacf20 CP	105	drm_mode_config_reset(drm);
	106	drm_kms_helper_poll_init(drm);
	107
0c43ff59	108	platform_set_drvdata(pdev, drm);
51dacf20 CP	109	return 0;
	110	}
	111
ee29a9ea	112	static int arcpgu_unload(struct drm_device *drm)
51dacf20	113	{
51dacf20	114	drm_kms_helper_poll_fini(drm);
b3e90917	115	drm_atomic_helper_shutdown(drm);
51dacf20 CP	116	drm_mode_config_cleanup(drm);
	117
	118	return 0;
	119	}
	120
13eee770 AB	121	#ifdef CONFIG_DEBUG_FS
	122	static int arcpgu_show_pxlclock(struct seq_file m, void arg)
	123	{
	124	struct drm_info_node node = (struct drm_info_node )m->private;
	125	struct drm_device *drm = node->minor->dev;
	126	struct arcpgu_drm_private *arcpgu = drm->dev_private;
	127	unsigned long clkrate = clk_get_rate(arcpgu->clk);
	128	unsigned long mode_clock = arcpgu->crtc.mode.crtc_clock * 1000;
	129
	130	seq_printf(m, "hw : %lu\n", clkrate);
	131	seq_printf(m, "mode: %lu\n", mode_clock);
	132	return 0;
	133	}
	134
	135	static struct drm_info_list arcpgu_debugfs_list[] = {
	136	{ "clocks", arcpgu_show_pxlclock, 0 },
13eee770 AB	137	};
	138
	139	static int arcpgu_debugfs_init(struct drm_minor *minor)
	140	{
	141	return drm_debugfs_create_files(arcpgu_debugfs_list,
	142	ARRAY_SIZE(arcpgu_debugfs_list), minor->debugfs_root, minor);
	143	}
	144	#endif
	145
51dacf20 CP	146	static struct drm_driver arcpgu_drm_driver = {
	147	.driver_features = DRIVER_MODESET \| DRIVER_GEM \| DRIVER_PRIME \|
	148	DRIVER_ATOMIC,
429ff616	149	.name = "arcpgu",
51dacf20 CP	150	.desc = "ARC PGU Controller",
	151	.date = "20160219",
	152	.major = 1,
	153	.minor = 0,
	154	.patchlevel = 0,
	155	.fops = &arcpgu_drm_ops,
	156	.dumb_create = drm_gem_cma_dumb_create,
51dacf20 CP	157	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
51dacf20 CP	158	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
e1512ee0	159	.gem_free_object_unlocked = drm_gem_cma_free_object,
80c7f714	160	.gem_print_info = drm_gem_cma_print_info,
51dacf20 CP	161	.gem_vm_ops = &drm_gem_cma_vm_ops,
	162	.gem_prime_export = drm_gem_prime_export,
	163	.gem_prime_import = drm_gem_prime_import,
	164	.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
	165	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
	166	.gem_prime_vmap = drm_gem_cma_prime_vmap,
	167	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
	168	.gem_prime_mmap = drm_gem_cma_prime_mmap,
13eee770 AB	169	#ifdef CONFIG_DEBUG_FS
	170	.debugfs_init = arcpgu_debugfs_init,
	171	#endif
51dacf20 CP	172	};
	173
	174	static int arcpgu_probe(struct platform_device *pdev)
	175	{
	176	struct drm_device *drm;
	177	int ret;
	178
	179	drm = drm_dev_alloc(&arcpgu_drm_driver, &pdev->dev);
0f288605 TG	180	if (IS_ERR(drm))
0f288605 TG	181	return PTR_ERR(drm);
51dacf20 CP	182
	183	ret = arcpgu_load(drm);
	184	if (ret)
	185	goto err_unref;
	186
	187	ret = drm_dev_register(drm, 0);
	188	if (ret)
	189	goto err_unload;
	190
c638f341 NT	191	drm_fbdev_generic_setup(drm, 16);
c638f341 NT	192
51dacf20 CP	193	return 0;
51dacf20 CP	194
51dacf20 CP	195	err_unload:
	196	arcpgu_unload(drm);
	197
	198	err_unref:
808bad32	199	drm_dev_put(drm);
51dacf20 CP	200
	201	return ret;
	202	}
	203
	204	static int arcpgu_remove(struct platform_device *pdev)
	205	{
	206	struct drm_device *drm = platform_get_drvdata(pdev);
	207
51dacf20 CP	208	drm_dev_unregister(drm);
51dacf20 CP	209	arcpgu_unload(drm);
808bad32	210	drm_dev_put(drm);
51dacf20 CP	211
	212	return 0;
	213	}
	214
	215	static const struct of_device_id arcpgu_of_table[] = {
	216	{.compatible = "snps,arcpgu"},
	217	{}
	218	};
	219
	220	MODULE_DEVICE_TABLE(of, arcpgu_of_table);
	221
	222	static struct platform_driver arcpgu_platform_driver = {
	223	.probe = arcpgu_probe,
	224	.remove = arcpgu_remove,
	225	.driver = {
	226	.name = "arcpgu",
	227	.of_match_table = arcpgu_of_table,
	228	},
	229	};
	230
	231	module_platform_driver(arcpgu_platform_driver);
	232
	233	MODULE_AUTHOR("Carlos Palminha <palminha@synopsys.com>");
	234	MODULE_DESCRIPTION("ARC PGU DRM driver");
	235	MODULE_LICENSE("GPL");