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_crtc.h"
25#include "sti_drv.h"
26#include "sti_plane.h"
27
28#define DRIVER_NAME "sti"
29#define DRIVER_DESC "STMicroelectronics SoC DRM"
30#define DRIVER_DATE "20140601"
31#define DRIVER_MAJOR 1
32#define DRIVER_MINOR 0
33
34#define STI_MAX_FB_HEIGHT 4096
35#define STI_MAX_FB_WIDTH 4096
36
37static int sti_drm_fps_get(void *data, u64 *val)
38{
39 struct drm_device *drm_dev = data;
40 struct drm_plane *p;
41 unsigned int i = 0;
42
43 *val = 0;
44 list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
45 struct sti_plane *plane = to_sti_plane(p);
46
47 *val |= plane->fps_info.output << i;
48 i++;
49 }
50
51 return 0;
52}
53
54static int sti_drm_fps_set(void *data, u64 val)
55{
56 struct drm_device *drm_dev = data;
57 struct drm_plane *p;
58 unsigned int i = 0;
59
60 list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
61 struct sti_plane *plane = to_sti_plane(p);
62
63 memset(&plane->fps_info, 0, sizeof(plane->fps_info));
64 plane->fps_info.output = (val >> i) & 1;
65
66 i++;
67 }
68
69 return 0;
70}
71
72DEFINE_SIMPLE_ATTRIBUTE(sti_drm_fps_fops,
73 sti_drm_fps_get, sti_drm_fps_set, "%llu\n");
74
75static int sti_drm_fps_dbg_show(struct seq_file *s, void *data)
76{
77 struct drm_info_node *node = s->private;
78 struct drm_device *dev = node->minor->dev;
79 struct drm_plane *p;
80
81 list_for_each_entry(p, &dev->mode_config.plane_list, head) {
82 struct sti_plane *plane = to_sti_plane(p);
83
84 seq_printf(s, "%s%s\n",
85 plane->fps_info.fps_str,
86 plane->fps_info.fips_str);
87 }
88
89 return 0;
90}
91
92static struct drm_info_list sti_drm_dbg_list[] = {
93 {"fps_get", sti_drm_fps_dbg_show, 0},
94};
95
96static int sti_drm_dbg_init(struct drm_minor *minor)
97{
98 int ret;
99
100 ret = drm_debugfs_create_files(sti_drm_dbg_list,
101 ARRAY_SIZE(sti_drm_dbg_list),
102 minor->debugfs_root, minor);
103 if (ret)
104 goto err;
105
106 debugfs_create_file("fps_show", S_IRUGO | S_IWUSR, minor->debugfs_root,
107 minor->dev, &sti_drm_fps_fops);
108
109 DRM_INFO("%s: debugfs installed\n", DRIVER_NAME);
110 return 0;
111err:
112 DRM_ERROR("%s: cannot install debugfs\n", DRIVER_NAME);
113 return ret;
114}
115
116static const struct drm_mode_config_funcs sti_mode_config_funcs = {
117 .fb_create = drm_gem_fb_create,
118 .atomic_check = drm_atomic_helper_check,
119 .atomic_commit = drm_atomic_helper_commit,
120};
121
122static void sti_mode_config_init(struct drm_device *dev)
123{
124 dev->mode_config.min_width = 0;
125 dev->mode_config.min_height = 0;
126
127 /*
128 * set max width and height as default value.
129 * this value would be used to check framebuffer size limitation
130 * at drm_mode_addfb().
131 */
132 dev->mode_config.max_width = STI_MAX_FB_WIDTH;
133 dev->mode_config.max_height = STI_MAX_FB_HEIGHT;
134
135 dev->mode_config.funcs = &sti_mode_config_funcs;
136
137 dev->mode_config.normalize_zpos = true;
138}
139
140DEFINE_DRM_GEM_CMA_FOPS(sti_driver_fops);
141
142static struct drm_driver sti_driver = {
143 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
144 .gem_free_object_unlocked = drm_gem_cma_free_object,
145 .gem_vm_ops = &drm_gem_cma_vm_ops,
146 .dumb_create = drm_gem_cma_dumb_create,
147 .fops = &sti_driver_fops,
148
149 .enable_vblank = sti_crtc_enable_vblank,
150 .disable_vblank = sti_crtc_disable_vblank,
151
152 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
153 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
154 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
155 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
156 .gem_prime_vmap = drm_gem_cma_prime_vmap,
157 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
158 .gem_prime_mmap = drm_gem_cma_prime_mmap,
159
160 .debugfs_init = sti_drm_dbg_init,
161
162 .name = DRIVER_NAME,
163 .desc = DRIVER_DESC,
164 .date = DRIVER_DATE,
165 .major = DRIVER_MAJOR,
166 .minor = DRIVER_MINOR,
167};
168
169static int compare_of(struct device *dev, void *data)
170{
171 return dev->of_node == data;
172}
173
174static int sti_init(struct drm_device *ddev)
175{
176 struct sti_private *private;
177
178 private = kzalloc(sizeof(*private), GFP_KERNEL);
179 if (!private)
180 return -ENOMEM;
181
182 ddev->dev_private = (void *)private;
183 dev_set_drvdata(ddev->dev, ddev);
184 private->drm_dev = ddev;
185
186 drm_mode_config_init(ddev);
187
188 sti_mode_config_init(ddev);
189
190 drm_kms_helper_poll_init(ddev);
191
192 return 0;
193}
194
195static void sti_cleanup(struct drm_device *ddev)
196{
197 struct sti_private *private = ddev->dev_private;
198
199 drm_kms_helper_poll_fini(ddev);
200 drm_atomic_helper_shutdown(ddev);
201 drm_mode_config_cleanup(ddev);
202 component_unbind_all(ddev->dev, ddev);
203 kfree(private);
204 ddev->dev_private = NULL;
205}
206
207static int sti_bind(struct device *dev)
208{
209 struct drm_device *ddev;
210 int ret;
211
212 ddev = drm_dev_alloc(&sti_driver, dev);
213 if (IS_ERR(ddev))
214 return PTR_ERR(ddev);
215
216 ret = sti_init(ddev);
217 if (ret)
218 goto err_drm_dev_put;
219
220 ret = component_bind_all(ddev->dev, ddev);
221 if (ret)
222 goto err_cleanup;
223
224 ret = drm_dev_register(ddev, 0);
225 if (ret)
226 goto err_cleanup;
227
228 drm_mode_config_reset(ddev);
229
230 drm_fbdev_generic_setup(ddev, 32);
231
232 return 0;
233
234err_cleanup:
235 sti_cleanup(ddev);
236err_drm_dev_put:
237 drm_dev_put(ddev);
238 return ret;
239}
240
241static void sti_unbind(struct device *dev)
242{
243 struct drm_device *ddev = dev_get_drvdata(dev);
244
245 drm_dev_unregister(ddev);
246 sti_cleanup(ddev);
247 drm_dev_put(ddev);
248}
249
250static const struct component_master_ops sti_ops = {
251 .bind = sti_bind,
252 .unbind = sti_unbind,
253};
254
255static int sti_platform_probe(struct platform_device *pdev)
256{
257 struct device *dev = &pdev->dev;
258 struct device_node *node = dev->of_node;
259 struct device_node *child_np;
260 struct component_match *match = NULL;
261
262 dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
263
264 devm_of_platform_populate(dev);
265
266 child_np = of_get_next_available_child(node, NULL);
267
268 while (child_np) {
269 drm_of_component_match_add(dev, &match, compare_of,
270 child_np);
271 child_np = of_get_next_available_child(node, child_np);
272 }
273
274 return component_master_add_with_match(dev, &sti_ops, match);
275}
276
277static int sti_platform_remove(struct platform_device *pdev)
278{
279 component_master_del(&pdev->dev, &sti_ops);
280
281 return 0;
282}
283
284static const struct of_device_id sti_dt_ids[] = {
285 { .compatible = "st,sti-display-subsystem", },
286 { /* end node */ },
287};
288MODULE_DEVICE_TABLE(of, sti_dt_ids);
289
290static struct platform_driver sti_platform_driver = {
291 .probe = sti_platform_probe,
292 .remove = sti_platform_remove,
293 .driver = {
294 .name = DRIVER_NAME,
295 .of_match_table = sti_dt_ids,
296 },
297};
298
299static struct platform_driver * const drivers[] = {
300 &sti_tvout_driver,
301 &sti_hqvdp_driver,
302 &sti_hdmi_driver,
303 &sti_hda_driver,
304 &sti_dvo_driver,
305 &sti_vtg_driver,
306 &sti_compositor_driver,
307 &sti_platform_driver,
308};
309
310static int sti_drm_init(void)
311{
312 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
313}
314module_init(sti_drm_init);
315
316static void sti_drm_exit(void)
317{
318 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
319}
320module_exit(sti_drm_exit);
321
322MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
323MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
324MODULE_LICENSE("GPL");