1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Copyright 2016 Linaro Ltd.
  4 * Copyright 2016 ZTE Corporation.
  5 */
  6
  7#include <linux/clk.h>
  8#include <linux/component.h>
  9#include <linux/list.h>
 10#include <linux/module.h>
 11#include <linux/of_graph.h>
 12#include <linux/of_platform.h>
 13#include <linux/spinlock.h>
 14
 15#include <drm/drm_atomic_helper.h>
 16#include <drm/drm_crtc.h>
 17#include <drm/drm_drv.h>
 18#include <drm/drm_fb_cma_helper.h>
 19#include <drm/drm_fb_helper.h>
 20#include <drm/drm_gem_cma_helper.h>
 21#include <drm/drm_gem_framebuffer_helper.h>
 22#include <drm/drm_of.h>
 23#include <drm/drm_probe_helper.h>
 24#include <drm/drm_vblank.h>
 25
 26#include "zx_drm_drv.h"
 27#include "zx_vou.h"
 28
 29static const struct drm_mode_config_funcs zx_drm_mode_config_funcs = {
 30	.fb_create = drm_gem_fb_create,
 31	.atomic_check = drm_atomic_helper_check,
 32	.atomic_commit = drm_atomic_helper_commit,
 33};
 34
 35DEFINE_DRM_GEM_CMA_FOPS(zx_drm_fops);
 36
 37static struct drm_driver zx_drm_driver = {
 38	.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
 39	.gem_free_object_unlocked = drm_gem_cma_free_object,
 40	.gem_vm_ops = &drm_gem_cma_vm_ops,
 41	.dumb_create = drm_gem_cma_dumb_create,
 42	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 43	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 44	.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 45	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 46	.gem_prime_vmap = drm_gem_cma_prime_vmap,
 47	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
 48	.gem_prime_mmap = drm_gem_cma_prime_mmap,
 49	.fops = &zx_drm_fops,
 50	.name = "zx-vou",
 51	.desc = "ZTE VOU Controller DRM",
 52	.date = "20160811",
 53	.major = 1,
 54	.minor = 0,
 55};
 56
 57static int zx_drm_bind(struct device *dev)
 58{
 59	struct drm_device *drm;
 60	int ret;
 61
 62	drm = drm_dev_alloc(&zx_drm_driver, dev);
 63	if (IS_ERR(drm))
 64		return PTR_ERR(drm);
 65
 66	dev_set_drvdata(dev, drm);
 67
 68	drm_mode_config_init(drm);
 69	drm->mode_config.min_width = 16;
 70	drm->mode_config.min_height = 16;
 71	drm->mode_config.max_width = 4096;
 72	drm->mode_config.max_height = 4096;
 73	drm->mode_config.funcs = &zx_drm_mode_config_funcs;
 74
 75	ret = component_bind_all(dev, drm);
 76	if (ret) {
 77		DRM_DEV_ERROR(dev, "failed to bind all components: %d\n", ret);
 78		goto out_unregister;
 79	}
 80
 81	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 82	if (ret < 0) {
 83		DRM_DEV_ERROR(dev, "failed to init vblank: %d\n", ret);
 84		goto out_unbind;
 85	}
 86
 87	/*
 88	 * We will manage irq handler on our own.  In this case, irq_enabled
 89	 * need to be true for using vblank core support.
 90	 */
 91	drm->irq_enabled = true;
 92
 93	drm_mode_config_reset(drm);
 94	drm_kms_helper_poll_init(drm);
 95
 96	ret = drm_dev_register(drm, 0);
 97	if (ret)
 98		goto out_poll_fini;
 99
100	drm_fbdev_generic_setup(drm, 32);
101
102	return 0;
103
104out_poll_fini:
105	drm_kms_helper_poll_fini(drm);
106	drm_mode_config_cleanup(drm);
107out_unbind:
108	component_unbind_all(dev, drm);
109out_unregister:
110	dev_set_drvdata(dev, NULL);
111	drm_dev_put(drm);
112	return ret;
113}
114
115static void zx_drm_unbind(struct device *dev)
116{
117	struct drm_device *drm = dev_get_drvdata(dev);
118
119	drm_dev_unregister(drm);
120	drm_kms_helper_poll_fini(drm);
121	drm_atomic_helper_shutdown(drm);
122	drm_mode_config_cleanup(drm);
123	component_unbind_all(dev, drm);
124	dev_set_drvdata(dev, NULL);
125	drm_dev_put(drm);
126}
127
128static const struct component_master_ops zx_drm_master_ops = {
129	.bind = zx_drm_bind,
130	.unbind = zx_drm_unbind,
131};
132
133static int compare_of(struct device *dev, void *data)
134{
135	return dev->of_node == data;
136}
137
138static int zx_drm_probe(struct platform_device *pdev)
139{
140	struct device *dev = &pdev->dev;
141	struct device_node *parent = dev->of_node;
142	struct device_node *child;
143	struct component_match *match = NULL;
144	int ret;
145
146	ret = devm_of_platform_populate(dev);
147	if (ret)
148		return ret;
149
150	for_each_available_child_of_node(parent, child)
151		component_match_add(dev, &match, compare_of, child);
152
153	return component_master_add_with_match(dev, &zx_drm_master_ops, match);
154}
155
156static int zx_drm_remove(struct platform_device *pdev)
157{
158	component_master_del(&pdev->dev, &zx_drm_master_ops);
159	return 0;
160}
161
162static const struct of_device_id zx_drm_of_match[] = {
163	{ .compatible = "zte,zx296718-vou", },
164	{ /* end */ },
165};
166MODULE_DEVICE_TABLE(of, zx_drm_of_match);
167
168static struct platform_driver zx_drm_platform_driver = {
169	.probe = zx_drm_probe,
170	.remove = zx_drm_remove,
171	.driver	= {
172		.name = "zx-drm",
173		.of_match_table	= zx_drm_of_match,
174	},
175};
176
177static struct platform_driver *drivers[] = {
178	&zx_crtc_driver,
179	&zx_hdmi_driver,
180	&zx_tvenc_driver,
181	&zx_vga_driver,
182	&zx_drm_platform_driver,
183};
184
185static int zx_drm_init(void)
186{
187	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
188}
189module_init(zx_drm_init);
190
191static void zx_drm_exit(void)
192{
193	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
194}
195module_exit(zx_drm_exit);
196
197MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
198MODULE_DESCRIPTION("ZTE ZX VOU DRM driver");
199MODULE_LICENSE("GPL v2");