1/*
  2 * Copyright 2016 Linaro Ltd.
  3 * Copyright 2016 ZTE Corporation.
  4 *
  5 * This program is free software; you can redistribute it and/or modify
  6 * it under the terms of the GNU General Public License version 2 as
  7 * published by the Free Software Foundation.
  8 *
  9 */
 10
 11#include <linux/clk.h>
 12#include <linux/component.h>
 13#include <linux/list.h>
 14#include <linux/module.h>
 15#include <linux/of_graph.h>
 16#include <linux/of_platform.h>
 17#include <linux/spinlock.h>
 18
 19#include <drm/drm_atomic_helper.h>
 20#include <drm/drm_crtc.h>
 21#include <drm/drm_crtc_helper.h>
 22#include <drm/drm_fb_cma_helper.h>
 23#include <drm/drm_fb_helper.h>
 24#include <drm/drm_gem_cma_helper.h>
 25#include <drm/drm_gem_framebuffer_helper.h>
 26#include <drm/drm_of.h>
 27#include <drm/drmP.h>
 28
 29#include "zx_drm_drv.h"
 30#include "zx_vou.h"
 31
 32static const struct drm_mode_config_funcs zx_drm_mode_config_funcs = {
 33	.fb_create = drm_gem_fb_create,
 34	.output_poll_changed = drm_fb_helper_output_poll_changed,
 35	.atomic_check = drm_atomic_helper_check,
 36	.atomic_commit = drm_atomic_helper_commit,
 37};
 38
 39DEFINE_DRM_GEM_CMA_FOPS(zx_drm_fops);
 40
 41static struct drm_driver zx_drm_driver = {
 42	.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
 43			   DRIVER_ATOMIC,
 44	.lastclose = drm_fb_helper_lastclose,
 45	.gem_free_object_unlocked = drm_gem_cma_free_object,
 46	.gem_vm_ops = &drm_gem_cma_vm_ops,
 47	.dumb_create = drm_gem_cma_dumb_create,
 48	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 49	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 50	.gem_prime_export = drm_gem_prime_export,
 51	.gem_prime_import = drm_gem_prime_import,
 52	.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 53	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 54	.gem_prime_vmap = drm_gem_cma_prime_vmap,
 55	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
 56	.gem_prime_mmap = drm_gem_cma_prime_mmap,
 57	.fops = &zx_drm_fops,
 58	.name = "zx-vou",
 59	.desc = "ZTE VOU Controller DRM",
 60	.date = "20160811",
 61	.major = 1,
 62	.minor = 0,
 63};
 64
 65static int zx_drm_bind(struct device *dev)
 66{
 67	struct drm_device *drm;
 68	int ret;
 69
 70	drm = drm_dev_alloc(&zx_drm_driver, dev);
 71	if (IS_ERR(drm))
 72		return PTR_ERR(drm);
 73
 74	dev_set_drvdata(dev, drm);
 75
 76	drm_mode_config_init(drm);
 77	drm->mode_config.min_width = 16;
 78	drm->mode_config.min_height = 16;
 79	drm->mode_config.max_width = 4096;
 80	drm->mode_config.max_height = 4096;
 81	drm->mode_config.funcs = &zx_drm_mode_config_funcs;
 82
 83	ret = component_bind_all(dev, drm);
 84	if (ret) {
 85		DRM_DEV_ERROR(dev, "failed to bind all components: %d\n", ret);
 86		goto out_unregister;
 87	}
 88
 89	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 90	if (ret < 0) {
 91		DRM_DEV_ERROR(dev, "failed to init vblank: %d\n", ret);
 92		goto out_unbind;
 93	}
 94
 95	/*
 96	 * We will manage irq handler on our own.  In this case, irq_enabled
 97	 * need to be true for using vblank core support.
 98	 */
 99	drm->irq_enabled = true;
100
101	drm_mode_config_reset(drm);
102	drm_kms_helper_poll_init(drm);
103
104	ret = drm_fb_cma_fbdev_init(drm, 32, 0);
105	if (ret) {
106		DRM_DEV_ERROR(dev, "failed to init cma fbdev: %d\n", ret);
107		goto out_poll_fini;
108	}
109
110	ret = drm_dev_register(drm, 0);
111	if (ret)
112		goto out_fbdev_fini;
113
114	return 0;
115
116out_fbdev_fini:
117	drm_fb_cma_fbdev_fini(drm);
118out_poll_fini:
119	drm_kms_helper_poll_fini(drm);
120	drm_mode_config_cleanup(drm);
121out_unbind:
122	component_unbind_all(dev, drm);
123out_unregister:
124	dev_set_drvdata(dev, NULL);
125	drm_dev_unref(drm);
126	return ret;
127}
128
129static void zx_drm_unbind(struct device *dev)
130{
131	struct drm_device *drm = dev_get_drvdata(dev);
132
133	drm_dev_unregister(drm);
134	drm_fb_cma_fbdev_fini(drm);
135	drm_kms_helper_poll_fini(drm);
136	drm_mode_config_cleanup(drm);
137	component_unbind_all(dev, drm);
138	dev_set_drvdata(dev, NULL);
139	drm_dev_unref(drm);
140}
141
142static const struct component_master_ops zx_drm_master_ops = {
143	.bind = zx_drm_bind,
144	.unbind = zx_drm_unbind,
145};
146
147static int compare_of(struct device *dev, void *data)
148{
149	return dev->of_node == data;
150}
151
152static int zx_drm_probe(struct platform_device *pdev)
153{
154	struct device *dev = &pdev->dev;
155	struct device_node *parent = dev->of_node;
156	struct device_node *child;
157	struct component_match *match = NULL;
158	int ret;
159
160	ret = devm_of_platform_populate(dev);
161	if (ret)
162		return ret;
163
164	for_each_available_child_of_node(parent, child) {
165		component_match_add(dev, &match, compare_of, child);
166		of_node_put(child);
167	}
168
169	return component_master_add_with_match(dev, &zx_drm_master_ops, match);
170}
171
172static int zx_drm_remove(struct platform_device *pdev)
173{
174	component_master_del(&pdev->dev, &zx_drm_master_ops);
175	return 0;
176}
177
178static const struct of_device_id zx_drm_of_match[] = {
179	{ .compatible = "zte,zx296718-vou", },
180	{ /* end */ },
181};
182MODULE_DEVICE_TABLE(of, zx_drm_of_match);
183
184static struct platform_driver zx_drm_platform_driver = {
185	.probe = zx_drm_probe,
186	.remove = zx_drm_remove,
187	.driver	= {
188		.name = "zx-drm",
189		.of_match_table	= zx_drm_of_match,
190	},
191};
192
193static struct platform_driver *drivers[] = {
194	&zx_crtc_driver,
195	&zx_hdmi_driver,
196	&zx_tvenc_driver,
197	&zx_vga_driver,
198	&zx_drm_platform_driver,
199};
200
201static int zx_drm_init(void)
202{
203	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
204}
205module_init(zx_drm_init);
206
207static void zx_drm_exit(void)
208{
209	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
210}
211module_exit(zx_drm_exit);
212
213MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
214MODULE_DESCRIPTION("ZTE ZX VOU DRM driver");
215MODULE_LICENSE("GPL v2");