[linux-2.6-block.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_crtc_helper.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_atomic_helper.h>
#include <linux/of_reserved_mem.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>
	18	#include <drm/drm_crtc_helper.h>
	19	#include <drm/drm_fb_cma_helper.h>
c638f341	20	#include <drm/drm_fb_helper.h>
51dacf20	21	#include <drm/drm_gem_cma_helper.h>
1cdea74e	22	#include <drm/drm_gem_framebuffer_helper.h>
51dacf20	23	#include <drm/drm_atomic_helper.h>
8aeab995	24	#include <linux/of_reserved_mem.h>
51dacf20 CP	25
	26	#include "arcpgu.h"
	27	#include "arcpgu_regs.h"
	28
a5cb37d8	29	static const struct drm_mode_config_funcs arcpgu_drm_modecfg_funcs = {
1cdea74e	30	.fb_create = drm_gem_fb_create,
51dacf20	31	.atomic_check = drm_atomic_helper_check,
17b58b23	32	.atomic_commit = drm_atomic_helper_commit,
51dacf20 CP	33	};
	34
	35	static void arcpgu_setup_mode_config(struct drm_device *drm)
	36	{
	37	drm_mode_config_init(drm);
	38	drm->mode_config.min_width = 0;
	39	drm->mode_config.min_height = 0;
	40	drm->mode_config.max_width = 1920;
	41	drm->mode_config.max_height = 1080;
	42	drm->mode_config.funcs = &arcpgu_drm_modecfg_funcs;
	43	}
	44
a8f8fb20	45	DEFINE_DRM_GEM_CMA_FOPS(arcpgu_drm_ops);
51dacf20	46
51dacf20 CP	47	static int arcpgu_load(struct drm_device *drm)
	48	{
	49	struct platform_device *pdev = to_platform_device(drm->dev);
	50	struct arcpgu_drm_private *arcpgu;
	51	struct device_node *encoder_node;
	52	struct resource *res;
	53	int ret;
	54
	55	arcpgu = devm_kzalloc(&pdev->dev, sizeof(*arcpgu), GFP_KERNEL);
	56	if (arcpgu == NULL)
	57	return -ENOMEM;
	58
	59	drm->dev_private = arcpgu;
	60
	61	arcpgu->clk = devm_clk_get(drm->dev, "pxlclk");
	62	if (IS_ERR(arcpgu->clk))
	63	return PTR_ERR(arcpgu->clk);
	64
51dacf20 CP	65	arcpgu_setup_mode_config(drm);
	66
	67	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	68	arcpgu->regs = devm_ioremap_resource(&pdev->dev, res);
7725936e	69	if (IS_ERR(arcpgu->regs))
51dacf20	70	return PTR_ERR(arcpgu->regs);
51dacf20 CP	71
	72	dev_info(drm->dev, "arc_pgu ID: 0x%x\n",
	73	arc_pgu_read(arcpgu, ARCPGU_REG_ID));
	74
8aeab995 AB	75	/* Get the optional framebuffer memory resource */
	76	ret = of_reserved_mem_device_init(drm->dev);
	77	if (ret && ret != -ENODEV)
	78	return ret;
	79
51dacf20 CP	80	if (dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32)))
	81	return -ENODEV;
	82
	83	if (arc_pgu_setup_crtc(drm) < 0)
	84	return -ENODEV;
	85
	86	/* find the encoder node and initialize it */
	87	encoder_node = of_parse_phandle(drm->dev->of_node, "encoder-slave", 0);
a189d28e RD	88	if (encoder_node) {
a189d28e RD	89	ret = arcpgu_drm_hdmi_init(drm, encoder_node);
8e7446c3	90	of_node_put(encoder_node);
a189d28e RD	91	if (ret < 0)
	92	return ret;
	93	} else {
ee29a9ea	94	ret = arcpgu_drm_sim_init(drm, NULL);
a189d28e RD	95	if (ret < 0)
a189d28e RD	96	return ret;
51dacf20 CP	97	}
51dacf20 CP	98
51dacf20 CP	99	drm_mode_config_reset(drm);
	100	drm_kms_helper_poll_init(drm);
	101
0c43ff59	102	platform_set_drvdata(pdev, drm);
51dacf20 CP	103	return 0;
	104	}
	105
ee29a9ea	106	static int arcpgu_unload(struct drm_device *drm)
51dacf20	107	{
51dacf20	108	drm_kms_helper_poll_fini(drm);
b3e90917	109	drm_atomic_helper_shutdown(drm);
51dacf20 CP	110	drm_mode_config_cleanup(drm);
	111
	112	return 0;
	113	}
	114
13eee770 AB	115	#ifdef CONFIG_DEBUG_FS
	116	static int arcpgu_show_pxlclock(struct seq_file m, void arg)
	117	{
	118	struct drm_info_node node = (struct drm_info_node )m->private;
	119	struct drm_device *drm = node->minor->dev;
	120	struct arcpgu_drm_private *arcpgu = drm->dev_private;
	121	unsigned long clkrate = clk_get_rate(arcpgu->clk);
	122	unsigned long mode_clock = arcpgu->crtc.mode.crtc_clock * 1000;
	123
	124	seq_printf(m, "hw : %lu\n", clkrate);
	125	seq_printf(m, "mode: %lu\n", mode_clock);
	126	return 0;
	127	}
	128
	129	static struct drm_info_list arcpgu_debugfs_list[] = {
	130	{ "clocks", arcpgu_show_pxlclock, 0 },
13eee770 AB	131	};
	132
	133	static int arcpgu_debugfs_init(struct drm_minor *minor)
	134	{
	135	return drm_debugfs_create_files(arcpgu_debugfs_list,
	136	ARRAY_SIZE(arcpgu_debugfs_list), minor->debugfs_root, minor);
	137	}
	138	#endif
	139
51dacf20 CP	140	static struct drm_driver arcpgu_drm_driver = {
	141	.driver_features = DRIVER_MODESET \| DRIVER_GEM \| DRIVER_PRIME \|
	142	DRIVER_ATOMIC,
429ff616	143	.name = "arcpgu",
51dacf20 CP	144	.desc = "ARC PGU Controller",
	145	.date = "20160219",
	146	.major = 1,
	147	.minor = 0,
	148	.patchlevel = 0,
	149	.fops = &arcpgu_drm_ops,
	150	.dumb_create = drm_gem_cma_dumb_create,
51dacf20 CP	151	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
51dacf20 CP	152	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
e1512ee0	153	.gem_free_object_unlocked = drm_gem_cma_free_object,
80c7f714	154	.gem_print_info = drm_gem_cma_print_info,
51dacf20 CP	155	.gem_vm_ops = &drm_gem_cma_vm_ops,
	156	.gem_prime_export = drm_gem_prime_export,
	157	.gem_prime_import = drm_gem_prime_import,
	158	.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
	159	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
	160	.gem_prime_vmap = drm_gem_cma_prime_vmap,
	161	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
	162	.gem_prime_mmap = drm_gem_cma_prime_mmap,
13eee770 AB	163	#ifdef CONFIG_DEBUG_FS
	164	.debugfs_init = arcpgu_debugfs_init,
	165	#endif
51dacf20 CP	166	};
	167
	168	static int arcpgu_probe(struct platform_device *pdev)
	169	{
	170	struct drm_device *drm;
	171	int ret;
	172
	173	drm = drm_dev_alloc(&arcpgu_drm_driver, &pdev->dev);
0f288605 TG	174	if (IS_ERR(drm))
0f288605 TG	175	return PTR_ERR(drm);
51dacf20 CP	176
	177	ret = arcpgu_load(drm);
	178	if (ret)
	179	goto err_unref;
	180
	181	ret = drm_dev_register(drm, 0);
	182	if (ret)
	183	goto err_unload;
	184
c638f341 NT	185	drm_fbdev_generic_setup(drm, 16);
c638f341 NT	186
51dacf20 CP	187	return 0;
51dacf20 CP	188
51dacf20 CP	189	err_unload:
	190	arcpgu_unload(drm);
	191
	192	err_unref:
808bad32	193	drm_dev_put(drm);
51dacf20 CP	194
	195	return ret;
	196	}
	197
	198	static int arcpgu_remove(struct platform_device *pdev)
	199	{
	200	struct drm_device *drm = platform_get_drvdata(pdev);
	201
51dacf20 CP	202	drm_dev_unregister(drm);
51dacf20 CP	203	arcpgu_unload(drm);
808bad32	204	drm_dev_put(drm);
51dacf20 CP	205
	206	return 0;
	207	}
	208
	209	static const struct of_device_id arcpgu_of_table[] = {
	210	{.compatible = "snps,arcpgu"},
	211	{}
	212	};
	213
	214	MODULE_DEVICE_TABLE(of, arcpgu_of_table);
	215
	216	static struct platform_driver arcpgu_platform_driver = {
	217	.probe = arcpgu_probe,
	218	.remove = arcpgu_remove,
	219	.driver = {
	220	.name = "arcpgu",
	221	.of_match_table = arcpgu_of_table,
	222	},
	223	};
	224
	225	module_platform_driver(arcpgu_platform_driver);
	226
	227	MODULE_AUTHOR("Carlos Palminha <palminha@synopsys.com>");
	228	MODULE_DESCRIPTION("ARC PGU DRM driver");
	229	MODULE_LICENSE("GPL");