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 int sti_drm_dbg_init(struct drm_minor *minor)
96{
97 int ret;
98
99 ret = drm_debugfs_create_files(sti_drm_dbg_list,
100 ARRAY_SIZE(sti_drm_dbg_list),
101 minor->debugfs_root, minor);
102 if (ret)
103 goto err;
104
105 debugfs_create_file("fps_show", S_IRUGO | S_IWUSR, minor->debugfs_root,
106 minor->dev, &sti_drm_fps_fops);
107
108 DRM_INFO("%s: debugfs installed\n", DRIVER_NAME);
109 return 0;
110err:
111 DRM_ERROR("%s: cannot install debugfs\n", DRIVER_NAME);
112 return ret;
113}
114
115static const struct drm_mode_config_funcs sti_mode_config_funcs = {
116 .fb_create = drm_gem_fb_create,
117 .atomic_check = drm_atomic_helper_check,
118 .atomic_commit = drm_atomic_helper_commit,
119};
120
121static void sti_mode_config_init(struct drm_device *dev)
122{
123 dev->mode_config.min_width = 0;
124 dev->mode_config.min_height = 0;
125
126 /*
127 * set max width and height as default value.
128 * this value would be used to check framebuffer size limitation
129 * at drm_mode_addfb().
130 */
131 dev->mode_config.max_width = STI_MAX_FB_WIDTH;
132 dev->mode_config.max_height = STI_MAX_FB_HEIGHT;
133
134 dev->mode_config.funcs = &sti_mode_config_funcs;
135
136 dev->mode_config.normalize_zpos = true;
137}
138
139DEFINE_DRM_GEM_CMA_FOPS(sti_driver_fops);
140
141static struct drm_driver sti_driver = {
142 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
143 .gem_free_object_unlocked = drm_gem_cma_free_object,
144 .gem_vm_ops = &drm_gem_cma_vm_ops,
145 .dumb_create = drm_gem_cma_dumb_create,
146 .fops = &sti_driver_fops,
147
148 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
149 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
150 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
151 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
152 .gem_prime_vmap = drm_gem_cma_prime_vmap,
153 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
154 .gem_prime_mmap = drm_gem_cma_prime_mmap,
155
156 .debugfs_init = sti_drm_dbg_init,
157
158 .name = DRIVER_NAME,
159 .desc = DRIVER_DESC,
160 .date = DRIVER_DATE,
161 .major = DRIVER_MAJOR,
162 .minor = DRIVER_MINOR,
163};
164
165static int compare_of(struct device *dev, void *data)
166{
167 return dev->of_node == data;
168}
169
170static int sti_init(struct drm_device *ddev)
171{
172 struct sti_private *private;
173
174 private = kzalloc(sizeof(*private), GFP_KERNEL);
175 if (!private)
176 return -ENOMEM;
177
178 ddev->dev_private = (void *)private;
179 dev_set_drvdata(ddev->dev, ddev);
180 private->drm_dev = ddev;
181
182 drm_mode_config_init(ddev);
183
184 sti_mode_config_init(ddev);
185
186 drm_kms_helper_poll_init(ddev);
187
188 return 0;
189}
190
191static void sti_cleanup(struct drm_device *ddev)
192{
193 struct sti_private *private = ddev->dev_private;
194
195 drm_kms_helper_poll_fini(ddev);
196 drm_atomic_helper_shutdown(ddev);
197 drm_mode_config_cleanup(ddev);
198 component_unbind_all(ddev->dev, ddev);
199 kfree(private);
200 ddev->dev_private = NULL;
201}
202
203static int sti_bind(struct device *dev)
204{
205 struct drm_device *ddev;
206 int ret;
207
208 ddev = drm_dev_alloc(&sti_driver, dev);
209 if (IS_ERR(ddev))
210 return PTR_ERR(ddev);
211
212 ret = sti_init(ddev);
213 if (ret)
214 goto err_drm_dev_put;
215
216 ret = component_bind_all(ddev->dev, ddev);
217 if (ret)
218 goto err_cleanup;
219
220 ret = drm_dev_register(ddev, 0);
221 if (ret)
222 goto err_cleanup;
223
224 drm_mode_config_reset(ddev);
225
226 drm_fbdev_generic_setup(ddev, 32);
227
228 return 0;
229
230err_cleanup:
231 sti_cleanup(ddev);
232err_drm_dev_put:
233 drm_dev_put(ddev);
234 return ret;
235}
236
237static void sti_unbind(struct device *dev)
238{
239 struct drm_device *ddev = dev_get_drvdata(dev);
240
241 drm_dev_unregister(ddev);
242 sti_cleanup(ddev);
243 drm_dev_put(ddev);
244}
245
246static const struct component_master_ops sti_ops = {
247 .bind = sti_bind,
248 .unbind = sti_unbind,
249};
250
251static int sti_platform_probe(struct platform_device *pdev)
252{
253 struct device *dev = &pdev->dev;
254 struct device_node *node = dev->of_node;
255 struct device_node *child_np;
256 struct component_match *match = NULL;
257
258 dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
259
260 devm_of_platform_populate(dev);
261
262 child_np = of_get_next_available_child(node, NULL);
263
264 while (child_np) {
265 drm_of_component_match_add(dev, &match, compare_of,
266 child_np);
267 child_np = of_get_next_available_child(node, child_np);
268 }
269
270 return component_master_add_with_match(dev, &sti_ops, match);
271}
272
273static int sti_platform_remove(struct platform_device *pdev)
274{
275 component_master_del(&pdev->dev, &sti_ops);
276
277 return 0;
278}
279
280static const struct of_device_id sti_dt_ids[] = {
281 { .compatible = "st,sti-display-subsystem", },
282 { /* end node */ },
283};
284MODULE_DEVICE_TABLE(of, sti_dt_ids);
285
286static struct platform_driver sti_platform_driver = {
287 .probe = sti_platform_probe,
288 .remove = sti_platform_remove,
289 .driver = {
290 .name = DRIVER_NAME,
291 .of_match_table = sti_dt_ids,
292 },
293};
294
295static struct platform_driver * const drivers[] = {
296 &sti_tvout_driver,
297 &sti_hqvdp_driver,
298 &sti_hdmi_driver,
299 &sti_hda_driver,
300 &sti_dvo_driver,
301 &sti_vtg_driver,
302 &sti_compositor_driver,
303 &sti_platform_driver,
304};
305
306static int sti_drm_init(void)
307{
308 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
309}
310module_init(sti_drm_init);
311
312static void sti_drm_exit(void)
313{
314 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
315}
316module_exit(sti_drm_exit);
317
318MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
319MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
320MODULE_LICENSE("GPL");