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8#include <linux/component.h>
9#include <linux/device.h>
10#include <linux/dma-buf.h>
11#include <linux/module.h>
12#include <linux/platform_device.h>
13
14#include <video/imx-ipu-v3.h>
15
16#include <drm/drm_atomic.h>
17#include <drm/drm_atomic_helper.h>
18#include <drm/drm_drv.h>
19#include <drm/drm_fb_cma_helper.h>
20#include <drm/drm_fb_helper.h>
21#include <drm/drm_gem_cma_helper.h>
22#include <drm/drm_gem_framebuffer_helper.h>
23#include <drm/drm_managed.h>
24#include <drm/drm_of.h>
25#include <drm/drm_plane_helper.h>
26#include <drm/drm_probe_helper.h>
27#include <drm/drm_vblank.h>
28
29#include "imx-drm.h"
30#include "ipuv3-plane.h"
31
32#define MAX_CRTC 4
33
34static int legacyfb_depth = 16;
35module_param(legacyfb_depth, int, 0444);
36
37DEFINE_DRM_GEM_CMA_FOPS(imx_drm_driver_fops);
38
39void imx_drm_connector_destroy(struct drm_connector *connector)
40{
41 drm_connector_unregister(connector);
42 drm_connector_cleanup(connector);
43}
44EXPORT_SYMBOL_GPL(imx_drm_connector_destroy);
45
46static int imx_drm_atomic_check(struct drm_device *dev,
47 struct drm_atomic_state *state)
48{
49 int ret;
50
51 ret = drm_atomic_helper_check(dev, state);
52 if (ret)
53 return ret;
54
55
56
57
58
59 ret = drm_atomic_helper_check_modeset(dev, state);
60 if (ret)
61 return ret;
62
63
64 ret = ipu_planes_assign_pre(dev, state);
65 if (ret)
66 return ret;
67
68 return ret;
69}
70
71static const struct drm_mode_config_funcs imx_drm_mode_config_funcs = {
72 .fb_create = drm_gem_fb_create,
73 .atomic_check = imx_drm_atomic_check,
74 .atomic_commit = drm_atomic_helper_commit,
75};
76
77static void imx_drm_atomic_commit_tail(struct drm_atomic_state *state)
78{
79 struct drm_device *dev = state->dev;
80 struct drm_plane *plane;
81 struct drm_plane_state *old_plane_state, *new_plane_state;
82 bool plane_disabling = false;
83 int i;
84 bool fence_cookie = dma_fence_begin_signalling();
85
86 drm_atomic_helper_commit_modeset_disables(dev, state);
87
88 drm_atomic_helper_commit_planes(dev, state,
89 DRM_PLANE_COMMIT_ACTIVE_ONLY |
90 DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET);
91
92 drm_atomic_helper_commit_modeset_enables(dev, state);
93
94 for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
95 if (drm_atomic_plane_disabling(old_plane_state, new_plane_state))
96 plane_disabling = true;
97 }
98
99
100
101
102
103
104
105
106 drm_atomic_helper_wait_for_flip_done(dev, state);
107
108 if (plane_disabling) {
109 for_each_old_plane_in_state(state, plane, old_plane_state, i)
110 ipu_plane_disable_deferred(plane);
111
112 }
113
114 drm_atomic_helper_commit_hw_done(state);
115 dma_fence_end_signalling(fence_cookie);
116}
117
118static const struct drm_mode_config_helper_funcs imx_drm_mode_config_helpers = {
119 .atomic_commit_tail = imx_drm_atomic_commit_tail,
120};
121
122
123int imx_drm_encoder_parse_of(struct drm_device *drm,
124 struct drm_encoder *encoder, struct device_node *np)
125{
126 uint32_t crtc_mask = drm_of_find_possible_crtcs(drm, np);
127
128
129
130
131
132
133
134 if (crtc_mask == 0)
135 return -EPROBE_DEFER;
136
137 encoder->possible_crtcs = crtc_mask;
138
139
140 encoder->possible_clones = 0;
141
142 return 0;
143}
144EXPORT_SYMBOL_GPL(imx_drm_encoder_parse_of);
145
146static const struct drm_ioctl_desc imx_drm_ioctls[] = {
147
148};
149
150static int imx_drm_dumb_create(struct drm_file *file_priv,
151 struct drm_device *drm,
152 struct drm_mode_create_dumb *args)
153{
154 u32 width = args->width;
155 int ret;
156
157 args->width = ALIGN(width, 8);
158
159 ret = drm_gem_cma_dumb_create(file_priv, drm, args);
160 if (ret)
161 return ret;
162
163 args->width = width;
164 return ret;
165}
166
167static const struct drm_driver imx_drm_driver = {
168 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
169 DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(imx_drm_dumb_create),
170 .ioctls = imx_drm_ioctls,
171 .num_ioctls = ARRAY_SIZE(imx_drm_ioctls),
172 .fops = &imx_drm_driver_fops,
173 .name = "imx-drm",
174 .desc = "i.MX DRM graphics",
175 .date = "20120507",
176 .major = 1,
177 .minor = 0,
178 .patchlevel = 0,
179};
180
181static int compare_of(struct device *dev, void *data)
182{
183 struct device_node *np = data;
184
185
186 if (strcmp(dev->driver->name, "imx-ipuv3-crtc") == 0) {
187 struct ipu_client_platformdata *pdata = dev->platform_data;
188
189 return pdata->of_node == np;
190 }
191
192
193 if (of_node_name_eq(np, "lvds-channel")) {
194 np = of_get_parent(np);
195 of_node_put(np);
196 }
197
198 return dev->of_node == np;
199}
200
201static int imx_drm_bind(struct device *dev)
202{
203 struct drm_device *drm;
204 int ret;
205
206 drm = drm_dev_alloc(&imx_drm_driver, dev);
207 if (IS_ERR(drm))
208 return PTR_ERR(drm);
209
210
211
212
213
214
215 drm->mode_config.min_width = 1;
216 drm->mode_config.min_height = 1;
217 drm->mode_config.max_width = 4096;
218 drm->mode_config.max_height = 4096;
219 drm->mode_config.funcs = &imx_drm_mode_config_funcs;
220 drm->mode_config.helper_private = &imx_drm_mode_config_helpers;
221 drm->mode_config.normalize_zpos = true;
222
223 ret = drmm_mode_config_init(drm);
224 if (ret)
225 goto err_kms;
226
227 ret = drm_vblank_init(drm, MAX_CRTC);
228 if (ret)
229 goto err_kms;
230
231 dev_set_drvdata(dev, drm);
232
233
234 ret = component_bind_all(dev, drm);
235 if (ret)
236 goto err_kms;
237
238 drm_mode_config_reset(drm);
239
240
241
242
243
244
245 if (legacyfb_depth != 16 && legacyfb_depth != 32) {
246 dev_warn(dev, "Invalid legacyfb_depth. Defaulting to 16bpp\n");
247 legacyfb_depth = 16;
248 }
249
250 drm_kms_helper_poll_init(drm);
251
252 ret = drm_dev_register(drm, 0);
253 if (ret)
254 goto err_poll_fini;
255
256 drm_fbdev_generic_setup(drm, legacyfb_depth);
257
258 return 0;
259
260err_poll_fini:
261 drm_kms_helper_poll_fini(drm);
262 component_unbind_all(drm->dev, drm);
263err_kms:
264 drm_dev_put(drm);
265
266 return ret;
267}
268
269static void imx_drm_unbind(struct device *dev)
270{
271 struct drm_device *drm = dev_get_drvdata(dev);
272
273 drm_dev_unregister(drm);
274
275 drm_kms_helper_poll_fini(drm);
276
277 component_unbind_all(drm->dev, drm);
278
279 drm_dev_put(drm);
280
281 dev_set_drvdata(dev, NULL);
282}
283
284static const struct component_master_ops imx_drm_ops = {
285 .bind = imx_drm_bind,
286 .unbind = imx_drm_unbind,
287};
288
289static int imx_drm_platform_probe(struct platform_device *pdev)
290{
291 int ret = drm_of_component_probe(&pdev->dev, compare_of, &imx_drm_ops);
292
293 if (!ret)
294 ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
295
296 return ret;
297}
298
299static int imx_drm_platform_remove(struct platform_device *pdev)
300{
301 component_master_del(&pdev->dev, &imx_drm_ops);
302 return 0;
303}
304
305#ifdef CONFIG_PM_SLEEP
306static int imx_drm_suspend(struct device *dev)
307{
308 struct drm_device *drm_dev = dev_get_drvdata(dev);
309
310 return drm_mode_config_helper_suspend(drm_dev);
311}
312
313static int imx_drm_resume(struct device *dev)
314{
315 struct drm_device *drm_dev = dev_get_drvdata(dev);
316
317 return drm_mode_config_helper_resume(drm_dev);
318}
319#endif
320
321static SIMPLE_DEV_PM_OPS(imx_drm_pm_ops, imx_drm_suspend, imx_drm_resume);
322
323static const struct of_device_id imx_drm_dt_ids[] = {
324 { .compatible = "fsl,imx-display-subsystem", },
325 { },
326};
327MODULE_DEVICE_TABLE(of, imx_drm_dt_ids);
328
329static struct platform_driver imx_drm_pdrv = {
330 .probe = imx_drm_platform_probe,
331 .remove = imx_drm_platform_remove,
332 .driver = {
333 .name = "imx-drm",
334 .pm = &imx_drm_pm_ops,
335 .of_match_table = imx_drm_dt_ids,
336 },
337};
338
339static struct platform_driver * const drivers[] = {
340 &imx_drm_pdrv,
341 &ipu_drm_driver,
342};
343
344static int __init imx_drm_init(void)
345{
346 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
347}
348module_init(imx_drm_init);
349
350static void __exit imx_drm_exit(void)
351{
352 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
353}
354module_exit(imx_drm_exit);
355
356MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
357MODULE_DESCRIPTION("i.MX drm driver core");
358MODULE_LICENSE("GPL");
359