tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) STMicroelectronics SA 2014
4 * Author: Benjamin Gaignard <benjamin.gaignard@st.com> for STMicroelectronics.
5 */
6
7#include <linux/component.h>
8#include <linux/dma-mapping.h>
9#include <linux/kernel.h>
10#include <linux/module.h>
11#include <linux/of_platform.h>
12
13#include <drm/drm_atomic.h>
14#include <drm/drm_atomic_helper.h>
15#include <drm/drm_debugfs.h>
16#include <drm/drm_drv.h>
17#include <drm/drm_fb_cma_helper.h>
18#include <drm/drm_fb_helper.h>
19#include <drm/drm_gem_cma_helper.h>
20#include <drm/drm_gem_framebuffer_helper.h>
21#include <drm/drm_of.h>
22#include <drm/drm_probe_helper.h>
23
24#include "sti_drv.h"
25#include "sti_plane.h"
26
27#define DRIVER_NAME "sti"
28#define DRIVER_DESC "STMicroelectronics SoC DRM"
29#define DRIVER_DATE "20140601"
30#define DRIVER_MAJOR 1
31#define DRIVER_MINOR 0
32
33#define STI_MAX_FB_HEIGHT 4096
34#define STI_MAX_FB_WIDTH 4096
35
36static int sti_drm_fps_get(void *data, u64 *val)
37{
38 struct drm_device *drm_dev = data;
39 struct drm_plane *p;
40 unsigned int i = 0;
41
42 *val = 0;
43 list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
44 struct sti_plane *plane = to_sti_plane(p);
45
46 *val |= plane->fps_info.output << i;
47 i++;
48 }
49
50 return 0;
51}
52
53static int sti_drm_fps_set(void *data, u64 val)
54{
55 struct drm_device *drm_dev = data;
56 struct drm_plane *p;
57 unsigned int i = 0;
58
59 list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
60 struct sti_plane *plane = to_sti_plane(p);
61
62 memset(&plane->fps_info, 0, sizeof(plane->fps_info));
63 plane->fps_info.output = (val >> i) & 1;
64
65 i++;
66 }
67
68 return 0;
69}
70
71DEFINE_SIMPLE_ATTRIBUTE(sti_drm_fps_fops,
72 sti_drm_fps_get, sti_drm_fps_set, "%llu\n");
73
74static int sti_drm_fps_dbg_show(struct seq_file *s, void *data)
75{
76 struct drm_info_node *node = s->private;
77 struct drm_device *dev = node->minor->dev;
78 struct drm_plane *p;
79
80 list_for_each_entry(p, &dev->mode_config.plane_list, head) {
81 struct sti_plane *plane = to_sti_plane(p);
82
83 seq_printf(s, "%s%s\n",
84 plane->fps_info.fps_str,
85 plane->fps_info.fips_str);
86 }
87
88 return 0;
89}
90
91static struct drm_info_list sti_drm_dbg_list[] = {
92 {"fps_get", sti_drm_fps_dbg_show, 0},
93};
94
95static void sti_drm_dbg_init(struct drm_minor *minor)
96{
97 drm_debugfs_create_files(sti_drm_dbg_list,
98 ARRAY_SIZE(sti_drm_dbg_list),
99 minor->debugfs_root, minor);
100
101 debugfs_create_file("fps_show", S_IRUGO | S_IWUSR, minor->debugfs_root,
102 minor->dev, &sti_drm_fps_fops);
103
104 DRM_INFO("%s: debugfs installed\n", DRIVER_NAME);
105}
106
107static const struct drm_mode_config_funcs sti_mode_config_funcs = {
108 .fb_create = drm_gem_fb_create,
109 .atomic_check = drm_atomic_helper_check,
110 .atomic_commit = drm_atomic_helper_commit,
111};
112
113static void sti_mode_config_init(struct drm_device *dev)
114{
115 dev->mode_config.min_width = 0;
116 dev->mode_config.min_height = 0;
117
118 /*
119 * set max width and height as default value.
120 * this value would be used to check framebuffer size limitation
121 * at drm_mode_addfb().
122 */
123 dev->mode_config.max_width = STI_MAX_FB_WIDTH;
124 dev->mode_config.max_height = STI_MAX_FB_HEIGHT;
125
126 dev->mode_config.funcs = &sti_mode_config_funcs;
127
128 dev->mode_config.normalize_zpos = true;
129}
130
131DEFINE_DRM_GEM_CMA_FOPS(sti_driver_fops);
132
133static struct drm_driver sti_driver = {
134 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
135 .gem_free_object_unlocked = drm_gem_cma_free_object,
136 .gem_vm_ops = &drm_gem_cma_vm_ops,
137 .dumb_create = drm_gem_cma_dumb_create,
138 .fops = &sti_driver_fops,
139
140 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
141 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
142 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
143 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
144 .gem_prime_vmap = drm_gem_cma_prime_vmap,
145 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
146 .gem_prime_mmap = drm_gem_cma_prime_mmap,
147
148 .debugfs_init = sti_drm_dbg_init,
149
150 .name = DRIVER_NAME,
151 .desc = DRIVER_DESC,
152 .date = DRIVER_DATE,
153 .major = DRIVER_MAJOR,
154 .minor = DRIVER_MINOR,
155};
156
157static int compare_of(struct device *dev, void *data)
158{
159 return dev->of_node == data;
160}
161
162static int sti_init(struct drm_device *ddev)
163{
164 struct sti_private *private;
165
166 private = kzalloc(sizeof(*private), GFP_KERNEL);
167 if (!private)
168 return -ENOMEM;
169
170 ddev->dev_private = (void *)private;
171 dev_set_drvdata(ddev->dev, ddev);
172 private->drm_dev = ddev;
173
174 drm_mode_config_init(ddev);
175
176 sti_mode_config_init(ddev);
177
178 drm_kms_helper_poll_init(ddev);
179
180 return 0;
181}
182
183static void sti_cleanup(struct drm_device *ddev)
184{
185 struct sti_private *private = ddev->dev_private;
186
187 drm_kms_helper_poll_fini(ddev);
188 drm_atomic_helper_shutdown(ddev);
189 drm_mode_config_cleanup(ddev);
190 component_unbind_all(ddev->dev, ddev);
191 kfree(private);
192 ddev->dev_private = NULL;
193}
194
195static int sti_bind(struct device *dev)
196{
197 struct drm_device *ddev;
198 int ret;
199
200 ddev = drm_dev_alloc(&sti_driver, dev);
201 if (IS_ERR(ddev))
202 return PTR_ERR(ddev);
203
204 ret = sti_init(ddev);
205 if (ret)
206 goto err_drm_dev_put;
207
208 ret = component_bind_all(ddev->dev, ddev);
209 if (ret)
210 goto err_cleanup;
211
212 ret = drm_dev_register(ddev, 0);
213 if (ret)
214 goto err_cleanup;
215
216 drm_mode_config_reset(ddev);
217
218 drm_fbdev_generic_setup(ddev, 32);
219
220 return 0;
221
222err_cleanup:
223 sti_cleanup(ddev);
224err_drm_dev_put:
225 drm_dev_put(ddev);
226 return ret;
227}
228
229static void sti_unbind(struct device *dev)
230{
231 struct drm_device *ddev = dev_get_drvdata(dev);
232
233 drm_dev_unregister(ddev);
234 sti_cleanup(ddev);
235 drm_dev_put(ddev);
236}
237
238static const struct component_master_ops sti_ops = {
239 .bind = sti_bind,
240 .unbind = sti_unbind,
241};
242
243static int sti_platform_probe(struct platform_device *pdev)
244{
245 struct device *dev = &pdev->dev;
246 struct device_node *node = dev->of_node;
247 struct device_node *child_np;
248 struct component_match *match = NULL;
249
250 dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
251
252 devm_of_platform_populate(dev);
253
254 child_np = of_get_next_available_child(node, NULL);
255
256 while (child_np) {
257 drm_of_component_match_add(dev, &match, compare_of,
258 child_np);
259 child_np = of_get_next_available_child(node, child_np);
260 }
261
262 return component_master_add_with_match(dev, &sti_ops, match);
263}
264
265static int sti_platform_remove(struct platform_device *pdev)
266{
267 component_master_del(&pdev->dev, &sti_ops);
268
269 return 0;
270}
271
272static const struct of_device_id sti_dt_ids[] = {
273 { .compatible = "st,sti-display-subsystem", },
274 { /* end node */ },
275};
276MODULE_DEVICE_TABLE(of, sti_dt_ids);
277
278static struct platform_driver sti_platform_driver = {
279 .probe = sti_platform_probe,
280 .remove = sti_platform_remove,
281 .driver = {
282 .name = DRIVER_NAME,
283 .of_match_table = sti_dt_ids,
284 },
285};
286
287static struct platform_driver * const drivers[] = {
288 &sti_tvout_driver,
289 &sti_hqvdp_driver,
290 &sti_hdmi_driver,
291 &sti_hda_driver,
292 &sti_dvo_driver,
293 &sti_vtg_driver,
294 &sti_compositor_driver,
295 &sti_platform_driver,
296};
297
298static int sti_drm_init(void)
299{
300 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
301}
302module_init(sti_drm_init);
303
304static void sti_drm_exit(void)
305{
306 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
307}
308module_exit(sti_drm_exit);
309
310MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
311MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
312MODULE_LICENSE("GPL");