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 .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");