tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 .atomic_check = drm_atomic_helper_check,
35 .atomic_commit = drm_atomic_helper_commit,
36};
37
38DEFINE_DRM_GEM_CMA_FOPS(zx_drm_fops);
39
40static struct drm_driver zx_drm_driver = {
41 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
42 DRIVER_ATOMIC,
43 .gem_free_object_unlocked = drm_gem_cma_free_object,
44 .gem_vm_ops = &drm_gem_cma_vm_ops,
45 .dumb_create = drm_gem_cma_dumb_create,
46 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
47 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
48 .gem_prime_export = drm_gem_prime_export,
49 .gem_prime_import = drm_gem_prime_import,
50 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
51 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
52 .gem_prime_vmap = drm_gem_cma_prime_vmap,
53 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
54 .gem_prime_mmap = drm_gem_cma_prime_mmap,
55 .fops = &zx_drm_fops,
56 .name = "zx-vou",
57 .desc = "ZTE VOU Controller DRM",
58 .date = "20160811",
59 .major = 1,
60 .minor = 0,
61};
62
63static int zx_drm_bind(struct device *dev)
64{
65 struct drm_device *drm;
66 int ret;
67
68 drm = drm_dev_alloc(&zx_drm_driver, dev);
69 if (IS_ERR(drm))
70 return PTR_ERR(drm);
71
72 dev_set_drvdata(dev, drm);
73
74 drm_mode_config_init(drm);
75 drm->mode_config.min_width = 16;
76 drm->mode_config.min_height = 16;
77 drm->mode_config.max_width = 4096;
78 drm->mode_config.max_height = 4096;
79 drm->mode_config.funcs = &zx_drm_mode_config_funcs;
80
81 ret = component_bind_all(dev, drm);
82 if (ret) {
83 DRM_DEV_ERROR(dev, "failed to bind all components: %d\n", ret);
84 goto out_unregister;
85 }
86
87 ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
88 if (ret < 0) {
89 DRM_DEV_ERROR(dev, "failed to init vblank: %d\n", ret);
90 goto out_unbind;
91 }
92
93 /*
94 * We will manage irq handler on our own. In this case, irq_enabled
95 * need to be true for using vblank core support.
96 */
97 drm->irq_enabled = true;
98
99 drm_mode_config_reset(drm);
100 drm_kms_helper_poll_init(drm);
101
102 ret = drm_dev_register(drm, 0);
103 if (ret)
104 goto out_poll_fini;
105
106 drm_fbdev_generic_setup(drm, 32);
107
108 return 0;
109
110out_poll_fini:
111 drm_kms_helper_poll_fini(drm);
112 drm_mode_config_cleanup(drm);
113out_unbind:
114 component_unbind_all(dev, drm);
115out_unregister:
116 dev_set_drvdata(dev, NULL);
117 drm_dev_unref(drm);
118 return ret;
119}
120
121static void zx_drm_unbind(struct device *dev)
122{
123 struct drm_device *drm = dev_get_drvdata(dev);
124
125 drm_dev_unregister(drm);
126 drm_kms_helper_poll_fini(drm);
127 drm_mode_config_cleanup(drm);
128 component_unbind_all(dev, drm);
129 dev_set_drvdata(dev, NULL);
130 drm_dev_unref(drm);
131}
132
133static const struct component_master_ops zx_drm_master_ops = {
134 .bind = zx_drm_bind,
135 .unbind = zx_drm_unbind,
136};
137
138static int compare_of(struct device *dev, void *data)
139{
140 return dev->of_node == data;
141}
142
143static int zx_drm_probe(struct platform_device *pdev)
144{
145 struct device *dev = &pdev->dev;
146 struct device_node *parent = dev->of_node;
147 struct device_node *child;
148 struct component_match *match = NULL;
149 int ret;
150
151 ret = devm_of_platform_populate(dev);
152 if (ret)
153 return ret;
154
155 for_each_available_child_of_node(parent, child)
156 component_match_add(dev, &match, compare_of, child);
157
158 return component_master_add_with_match(dev, &zx_drm_master_ops, match);
159}
160
161static int zx_drm_remove(struct platform_device *pdev)
162{
163 component_master_del(&pdev->dev, &zx_drm_master_ops);
164 return 0;
165}
166
167static const struct of_device_id zx_drm_of_match[] = {
168 { .compatible = "zte,zx296718-vou", },
169 { /* end */ },
170};
171MODULE_DEVICE_TABLE(of, zx_drm_of_match);
172
173static struct platform_driver zx_drm_platform_driver = {
174 .probe = zx_drm_probe,
175 .remove = zx_drm_remove,
176 .driver = {
177 .name = "zx-drm",
178 .of_match_table = zx_drm_of_match,
179 },
180};
181
182static struct platform_driver *drivers[] = {
183 &zx_crtc_driver,
184 &zx_hdmi_driver,
185 &zx_tvenc_driver,
186 &zx_vga_driver,
187 &zx_drm_platform_driver,
188};
189
190static int zx_drm_init(void)
191{
192 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
193}
194module_init(zx_drm_init);
195
196static void zx_drm_exit(void)
197{
198 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
199}
200module_exit(zx_drm_exit);
201
202MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
203MODULE_DESCRIPTION("ZTE ZX VOU DRM driver");
204MODULE_LICENSE("GPL v2");