blob: 9ce7574ac8736385c2dcf123a4215cc3d270587c [file] [log] [blame]
Benjamin Gaignard9bbf86f2014-07-31 09:39:11 +02001/*
2 * Copyright (C) STMicroelectronics SA 2014
3 * Author: Benjamin Gaignard <benjamin.gaignard@st.com> for STMicroelectronics.
4 * License terms: GNU General Public License (GPL), version 2
5 */
6
7#include <drm/drmP.h>
8
9#include <linux/component.h>
10#include <linux/debugfs.h>
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/of_platform.h>
14
15#include <drm/drm_crtc_helper.h>
16#include <drm/drm_gem_cma_helper.h>
17#include <drm/drm_fb_cma_helper.h>
18
19#include "sti_drm_drv.h"
20#include "sti_drm_crtc.h"
21
22#define DRIVER_NAME "sti"
23#define DRIVER_DESC "STMicroelectronics SoC DRM"
24#define DRIVER_DATE "20140601"
25#define DRIVER_MAJOR 1
26#define DRIVER_MINOR 0
27
28#define STI_MAX_FB_HEIGHT 4096
29#define STI_MAX_FB_WIDTH 4096
30
31static struct drm_mode_config_funcs sti_drm_mode_config_funcs = {
32 .fb_create = drm_fb_cma_create,
33};
34
35static void sti_drm_mode_config_init(struct drm_device *dev)
36{
37 dev->mode_config.min_width = 0;
38 dev->mode_config.min_height = 0;
39
40 /*
41 * set max width and height as default value.
42 * this value would be used to check framebuffer size limitation
43 * at drm_mode_addfb().
44 */
45 dev->mode_config.max_width = STI_MAX_FB_HEIGHT;
46 dev->mode_config.max_height = STI_MAX_FB_WIDTH;
47
48 dev->mode_config.funcs = &sti_drm_mode_config_funcs;
49}
50
51static int sti_drm_load(struct drm_device *dev, unsigned long flags)
52{
53 struct sti_drm_private *private;
54 int ret;
55
56 private = kzalloc(sizeof(struct sti_drm_private), GFP_KERNEL);
57 if (!private) {
58 DRM_ERROR("Failed to allocate private\n");
59 return -ENOMEM;
60 }
61 dev->dev_private = (void *)private;
62 private->drm_dev = dev;
63
64 drm_mode_config_init(dev);
65 drm_kms_helper_poll_init(dev);
66
67 sti_drm_mode_config_init(dev);
68
69 ret = component_bind_all(dev->dev, dev);
Benjamin Gaignardf78e7722014-12-11 13:35:29 +010070 if (ret) {
71 drm_kms_helper_poll_fini(dev);
72 drm_mode_config_cleanup(dev);
73 kfree(private);
Benjamin Gaignard9bbf86f2014-07-31 09:39:11 +020074 return ret;
Benjamin Gaignardf78e7722014-12-11 13:35:29 +010075 }
Benjamin Gaignard9bbf86f2014-07-31 09:39:11 +020076
77 drm_helper_disable_unused_functions(dev);
78
79#ifdef CONFIG_DRM_STI_FBDEV
80 drm_fbdev_cma_init(dev, 32,
81 dev->mode_config.num_crtc,
82 dev->mode_config.num_connector);
83#endif
84 return 0;
85}
86
87static const struct file_operations sti_drm_driver_fops = {
88 .owner = THIS_MODULE,
89 .open = drm_open,
90 .mmap = drm_gem_cma_mmap,
91 .poll = drm_poll,
92 .read = drm_read,
93 .unlocked_ioctl = drm_ioctl,
94#ifdef CONFIG_COMPAT
95 .compat_ioctl = drm_compat_ioctl,
96#endif
97 .release = drm_release,
98};
99
100static struct dma_buf *sti_drm_gem_prime_export(struct drm_device *dev,
101 struct drm_gem_object *obj,
102 int flags)
103{
104 /* we want to be able to write in mmapped buffer */
105 flags |= O_RDWR;
106 return drm_gem_prime_export(dev, obj, flags);
107}
108
109static struct drm_driver sti_drm_driver = {
110 .driver_features = DRIVER_HAVE_IRQ | DRIVER_MODESET |
111 DRIVER_GEM | DRIVER_PRIME,
112 .load = sti_drm_load,
113 .gem_free_object = drm_gem_cma_free_object,
114 .gem_vm_ops = &drm_gem_cma_vm_ops,
115 .dumb_create = drm_gem_cma_dumb_create,
116 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
117 .dumb_destroy = drm_gem_dumb_destroy,
118 .fops = &sti_drm_driver_fops,
119
120 .get_vblank_counter = drm_vblank_count,
121 .enable_vblank = sti_drm_crtc_enable_vblank,
122 .disable_vblank = sti_drm_crtc_disable_vblank,
123
124 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
125 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
126 .gem_prime_export = sti_drm_gem_prime_export,
127 .gem_prime_import = drm_gem_prime_import,
128 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
129 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
130 .gem_prime_vmap = drm_gem_cma_prime_vmap,
131 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
132 .gem_prime_mmap = drm_gem_cma_prime_mmap,
133
134 .name = DRIVER_NAME,
135 .desc = DRIVER_DESC,
136 .date = DRIVER_DATE,
137 .major = DRIVER_MAJOR,
138 .minor = DRIVER_MINOR,
139};
140
141static int compare_of(struct device *dev, void *data)
142{
143 return dev->of_node == data;
144}
145
146static int sti_drm_bind(struct device *dev)
147{
148 return drm_platform_init(&sti_drm_driver, to_platform_device(dev));
149}
150
151static void sti_drm_unbind(struct device *dev)
152{
153 drm_put_dev(dev_get_drvdata(dev));
154}
155
156static const struct component_master_ops sti_drm_ops = {
157 .bind = sti_drm_bind,
158 .unbind = sti_drm_unbind,
159};
160
161static int sti_drm_master_probe(struct platform_device *pdev)
162{
163 struct device *dev = &pdev->dev;
164 struct device_node *node = dev->parent->of_node;
165 struct device_node *child_np;
166 struct component_match *match = NULL;
167
168 dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
169
170 child_np = of_get_next_available_child(node, NULL);
171
172 while (child_np) {
173 component_match_add(dev, &match, compare_of, child_np);
174 of_node_put(child_np);
175 child_np = of_get_next_available_child(node, child_np);
176 }
177
178 return component_master_add_with_match(dev, &sti_drm_ops, match);
179}
180
181static int sti_drm_master_remove(struct platform_device *pdev)
182{
183 component_master_del(&pdev->dev, &sti_drm_ops);
184 return 0;
185}
186
187static struct platform_driver sti_drm_master_driver = {
188 .probe = sti_drm_master_probe,
189 .remove = sti_drm_master_remove,
190 .driver = {
191 .owner = THIS_MODULE,
192 .name = DRIVER_NAME "__master",
193 },
194};
195
196static int sti_drm_platform_probe(struct platform_device *pdev)
197{
198 struct device *dev = &pdev->dev;
199 struct device_node *node = dev->of_node;
200 struct platform_device *master;
201
202 of_platform_populate(node, NULL, NULL, dev);
203
204 platform_driver_register(&sti_drm_master_driver);
205 master = platform_device_register_resndata(dev,
206 DRIVER_NAME "__master", -1,
207 NULL, 0, NULL, 0);
Wei Yongjuneacd9aa2014-08-26 12:24:24 +0200208 if (IS_ERR(master))
209 return PTR_ERR(master);
Benjamin Gaignard9bbf86f2014-07-31 09:39:11 +0200210
211 platform_set_drvdata(pdev, master);
212 return 0;
213}
214
215static int sti_drm_platform_remove(struct platform_device *pdev)
216{
217 struct platform_device *master = platform_get_drvdata(pdev);
218
219 of_platform_depopulate(&pdev->dev);
220 platform_device_unregister(master);
221 platform_driver_unregister(&sti_drm_master_driver);
222 return 0;
223}
224
225static const struct of_device_id sti_drm_dt_ids[] = {
226 { .compatible = "st,sti-display-subsystem", },
227 { /* end node */ },
228};
229MODULE_DEVICE_TABLE(of, sti_drm_dt_ids);
230
231static struct platform_driver sti_drm_platform_driver = {
232 .probe = sti_drm_platform_probe,
233 .remove = sti_drm_platform_remove,
234 .driver = {
235 .owner = THIS_MODULE,
236 .name = DRIVER_NAME,
237 .of_match_table = sti_drm_dt_ids,
238 },
239};
240
241module_platform_driver(sti_drm_platform_driver);
242
243MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
244MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
245MODULE_LICENSE("GPL");