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
29 static 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
35 DEFINE_DRM_GEM_CMA_FOPS(zx_drm_fops);
36
37 static 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
zx_drm_bind(struct device * dev)57 static 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
104 out_poll_fini:
105 drm_kms_helper_poll_fini(drm);
106 drm_mode_config_cleanup(drm);
107 out_unbind:
108 component_unbind_all(dev, drm);
109 out_unregister:
110 dev_set_drvdata(dev, NULL);
111 drm_dev_put(drm);
112 return ret;
113 }
114
zx_drm_unbind(struct device * dev)115 static 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
128 static const struct component_master_ops zx_drm_master_ops = {
129 .bind = zx_drm_bind,
130 .unbind = zx_drm_unbind,
131 };
132
compare_of(struct device * dev,void * data)133 static int compare_of(struct device *dev, void *data)
134 {
135 return dev->of_node == data;
136 }
137
zx_drm_probe(struct platform_device * pdev)138 static 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
zx_drm_remove(struct platform_device * pdev)156 static int zx_drm_remove(struct platform_device *pdev)
157 {
158 component_master_del(&pdev->dev, &zx_drm_master_ops);
159 return 0;
160 }
161
162 static const struct of_device_id zx_drm_of_match[] = {
163 { .compatible = "zte,zx296718-vou", },
164 { /* end */ },
165 };
166 MODULE_DEVICE_TABLE(of, zx_drm_of_match);
167
168 static 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
177 static 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
zx_drm_init(void)185 static int zx_drm_init(void)
186 {
187 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
188 }
189 module_init(zx_drm_init);
190
zx_drm_exit(void)191 static void zx_drm_exit(void)
192 {
193 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
194 }
195 module_exit(zx_drm_exit);
196
197 MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
198 MODULE_DESCRIPTION("ZTE ZX VOU DRM driver");
199 MODULE_LICENSE("GPL v2");
200
