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_of.h>
26#include <drm/drmP.h>
27
28#include "zx_drm_drv.h"
29#include "zx_vou.h"
30
31struct zx_drm_private {
32 struct drm_fbdev_cma *fbdev;
33};
34
35static void zx_drm_fb_output_poll_changed(struct drm_device *drm)
36{
37 struct zx_drm_private *priv = drm->dev_private;
38
39 drm_fbdev_cma_hotplug_event(priv->fbdev);
40}
41
42static const struct drm_mode_config_funcs zx_drm_mode_config_funcs = {
43 .fb_create = drm_fb_cma_create,
44 .output_poll_changed = zx_drm_fb_output_poll_changed,
45 .atomic_check = drm_atomic_helper_check,
46 .atomic_commit = drm_atomic_helper_commit,
47};
48
49static void zx_drm_lastclose(struct drm_device *drm)
50{
51 struct zx_drm_private *priv = drm->dev_private;
52
53 drm_fbdev_cma_restore_mode(priv->fbdev);
54}
55
56DEFINE_DRM_GEM_CMA_FOPS(zx_drm_fops);
57
58static struct drm_driver zx_drm_driver = {
59 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
60 DRIVER_ATOMIC,
61 .lastclose = zx_drm_lastclose,
62 .gem_free_object = drm_gem_cma_free_object,
63 .gem_vm_ops = &drm_gem_cma_vm_ops,
64 .dumb_create = drm_gem_cma_dumb_create,
65 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
66 .dumb_destroy = drm_gem_dumb_destroy,
67 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
68 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
69 .gem_prime_export = drm_gem_prime_export,
70 .gem_prime_import = drm_gem_prime_import,
71 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
72 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
73 .gem_prime_vmap = drm_gem_cma_prime_vmap,
74 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
75 .gem_prime_mmap = drm_gem_cma_prime_mmap,
76 .fops = &zx_drm_fops,
77 .name = "zx-vou",
78 .desc = "ZTE VOU Controller DRM",
79 .date = "20160811",
80 .major = 1,
81 .minor = 0,
82};
83
84static int zx_drm_bind(struct device *dev)
85{
86 struct drm_device *drm;
87 struct zx_drm_private *priv;
88 int ret;
89
90 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
91 if (!priv)
92 return -ENOMEM;
93
94 drm = drm_dev_alloc(&zx_drm_driver, dev);
95 if (IS_ERR(drm))
96 return PTR_ERR(drm);
97
98 drm->dev_private = priv;
99 dev_set_drvdata(dev, drm);
100
101 drm_mode_config_init(drm);
102 drm->mode_config.min_width = 16;
103 drm->mode_config.min_height = 16;
104 drm->mode_config.max_width = 4096;
105 drm->mode_config.max_height = 4096;
106 drm->mode_config.funcs = &zx_drm_mode_config_funcs;
107
108 ret = component_bind_all(dev, drm);
109 if (ret) {
110 DRM_DEV_ERROR(dev, "failed to bind all components: %d\n", ret);
111 goto out_unregister;
112 }
113
114 ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
115 if (ret < 0) {
116 DRM_DEV_ERROR(dev, "failed to init vblank: %d\n", ret);
117 goto out_unbind;
118 }
119
120 /*
121 * We will manage irq handler on our own. In this case, irq_enabled
122 * need to be true for using vblank core support.
123 */
124 drm->irq_enabled = true;
125
126 drm_mode_config_reset(drm);
127 drm_kms_helper_poll_init(drm);
128
129 priv->fbdev = drm_fbdev_cma_init(drm, 32,
130 drm->mode_config.num_connector);
131 if (IS_ERR(priv->fbdev)) {
132 ret = PTR_ERR(priv->fbdev);
133 DRM_DEV_ERROR(dev, "failed to init cma fbdev: %d\n", ret);
134 priv->fbdev = NULL;
135 goto out_poll_fini;
136 }
137
138 ret = drm_dev_register(drm, 0);
139 if (ret)
140 goto out_fbdev_fini;
141
142 return 0;
143
144out_fbdev_fini:
145 if (priv->fbdev) {
146 drm_fbdev_cma_fini(priv->fbdev);
147 priv->fbdev = NULL;
148 }
149out_poll_fini:
150 drm_kms_helper_poll_fini(drm);
151 drm_mode_config_cleanup(drm);
152 drm_vblank_cleanup(drm);
153out_unbind:
154 component_unbind_all(dev, drm);
155out_unregister:
156 dev_set_drvdata(dev, NULL);
157 drm->dev_private = NULL;
158 drm_dev_unref(drm);
159 return ret;
160}
161
162static void zx_drm_unbind(struct device *dev)
163{
164 struct drm_device *drm = dev_get_drvdata(dev);
165 struct zx_drm_private *priv = drm->dev_private;
166
167 drm_dev_unregister(drm);
168 if (priv->fbdev) {
169 drm_fbdev_cma_fini(priv->fbdev);
170 priv->fbdev = NULL;
171 }
172 drm_kms_helper_poll_fini(drm);
173 drm_mode_config_cleanup(drm);
174 drm_vblank_cleanup(drm);
175 component_unbind_all(dev, drm);
176 dev_set_drvdata(dev, NULL);
177 drm->dev_private = NULL;
178 drm_dev_unref(drm);
179}
180
181static const struct component_master_ops zx_drm_master_ops = {
182 .bind = zx_drm_bind,
183 .unbind = zx_drm_unbind,
184};
185
186static int compare_of(struct device *dev, void *data)
187{
188 return dev->of_node == data;
189}
190
191static int zx_drm_probe(struct platform_device *pdev)
192{
193 struct device *dev = &pdev->dev;
194 struct device_node *parent = dev->of_node;
195 struct device_node *child;
196 struct component_match *match = NULL;
197 int ret;
198
199 ret = of_platform_populate(parent, NULL, NULL, dev);
200 if (ret)
201 return ret;
202
203 for_each_available_child_of_node(parent, child) {
204 component_match_add(dev, &match, compare_of, child);
205 of_node_put(child);
206 }
207
208 return component_master_add_with_match(dev, &zx_drm_master_ops, match);
209}
210
211static int zx_drm_remove(struct platform_device *pdev)
212{
213 component_master_del(&pdev->dev, &zx_drm_master_ops);
214 return 0;
215}
216
217static const struct of_device_id zx_drm_of_match[] = {
218 { .compatible = "zte,zx296718-vou", },
219 { /* end */ },
220};
221MODULE_DEVICE_TABLE(of, zx_drm_of_match);
222
223static struct platform_driver zx_drm_platform_driver = {
224 .probe = zx_drm_probe,
225 .remove = zx_drm_remove,
226 .driver = {
227 .name = "zx-drm",
228 .of_match_table = zx_drm_of_match,
229 },
230};
231
232static struct platform_driver *drivers[] = {
233 &zx_crtc_driver,
234 &zx_hdmi_driver,
235 &zx_tvenc_driver,
236 &zx_drm_platform_driver,
237};
238
239static int zx_drm_init(void)
240{
241 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
242}
243module_init(zx_drm_init);
244
245static void zx_drm_exit(void)
246{
247 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
248}
249module_exit(zx_drm_exit);
250
251MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
252MODULE_DESCRIPTION("ZTE ZX VOU DRM driver");
253MODULE_LICENSE("GPL v2");