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1// SPDX-License-Identifier: GPL-2.0-or-later
2/* exynos_drm_vidi.c
3 *
4 * Copyright (C) 2012 Samsung Electronics Co.Ltd
5 * Authors:
6 * Inki Dae <inki.dae@samsung.com>
7 */
8
9#include <linux/component.h>
10#include <linux/kernel.h>
11#include <linux/platform_device.h>
12#include <linux/timer.h>
13
14#include <drm/drm_atomic_helper.h>
15#include <drm/drm_edid.h>
16#include <drm/drm_framebuffer.h>
17#include <drm/drm_probe_helper.h>
18#include <drm/drm_simple_kms_helper.h>
19#include <drm/drm_vblank.h>
20#include <drm/exynos_drm.h>
21
22#include "exynos_drm_crtc.h"
23#include "exynos_drm_drv.h"
24#include "exynos_drm_fb.h"
25#include "exynos_drm_plane.h"
26#include "exynos_drm_vidi.h"
27
28/* VIDI uses fixed refresh rate of 50Hz */
29#define VIDI_REFRESH_TIME (1000 / 50)
30
31/* vidi has totally three virtual windows. */
32#define WINDOWS_NR 3
33
34#define ctx_from_connector(c) container_of(c, struct vidi_context, \
35 connector)
36
37struct vidi_context {
38 struct drm_encoder encoder;
39 struct drm_device *drm_dev;
40 struct device *dev;
41 struct exynos_drm_crtc *crtc;
42 struct drm_connector connector;
43 struct exynos_drm_plane planes[WINDOWS_NR];
44 const struct drm_edid *raw_edid;
45 unsigned int clkdiv;
46 unsigned int connected;
47 bool suspended;
48 struct timer_list timer;
49 struct mutex lock;
50};
51
52static inline struct vidi_context *encoder_to_vidi(struct drm_encoder *e)
53{
54 return container_of(e, struct vidi_context, encoder);
55}
56
57static const char fake_edid_info[] = {
58 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
59 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
60 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
61 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
62 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
63 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
64 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
65 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
66 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
67 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
68 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
69 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
70 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
71 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
72 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
73 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
74 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
75 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
76 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
77 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
78 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
79 0x00, 0x00, 0x00, 0x06
80};
81
82static const uint32_t formats[] = {
83 DRM_FORMAT_XRGB8888,
84 DRM_FORMAT_ARGB8888,
85 DRM_FORMAT_NV12,
86};
87
88static const enum drm_plane_type vidi_win_types[WINDOWS_NR] = {
89 DRM_PLANE_TYPE_PRIMARY,
90 DRM_PLANE_TYPE_OVERLAY,
91 DRM_PLANE_TYPE_CURSOR,
92};
93
94static int vidi_enable_vblank(struct exynos_drm_crtc *crtc)
95{
96 struct vidi_context *ctx = crtc->ctx;
97
98 if (ctx->suspended)
99 return -EPERM;
100
101 mod_timer(&ctx->timer,
102 jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1);
103
104 return 0;
105}
106
107static void vidi_disable_vblank(struct exynos_drm_crtc *crtc)
108{
109}
110
111static void vidi_update_plane(struct exynos_drm_crtc *crtc,
112 struct exynos_drm_plane *plane)
113{
114 struct drm_plane_state *state = plane->base.state;
115 struct vidi_context *ctx = crtc->ctx;
116 dma_addr_t addr;
117
118 if (ctx->suspended)
119 return;
120
121 addr = exynos_drm_fb_dma_addr(state->fb, 0);
122 DRM_DEV_DEBUG_KMS(ctx->dev, "dma_addr = %pad\n", &addr);
123}
124
125static void vidi_atomic_enable(struct exynos_drm_crtc *crtc)
126{
127 struct vidi_context *ctx = crtc->ctx;
128
129 mutex_lock(&ctx->lock);
130
131 ctx->suspended = false;
132
133 mutex_unlock(&ctx->lock);
134
135 drm_crtc_vblank_on(&crtc->base);
136}
137
138static void vidi_atomic_disable(struct exynos_drm_crtc *crtc)
139{
140 struct vidi_context *ctx = crtc->ctx;
141
142 drm_crtc_vblank_off(&crtc->base);
143
144 mutex_lock(&ctx->lock);
145
146 ctx->suspended = true;
147
148 mutex_unlock(&ctx->lock);
149}
150
151static const struct exynos_drm_crtc_ops vidi_crtc_ops = {
152 .atomic_enable = vidi_atomic_enable,
153 .atomic_disable = vidi_atomic_disable,
154 .enable_vblank = vidi_enable_vblank,
155 .disable_vblank = vidi_disable_vblank,
156 .update_plane = vidi_update_plane,
157 .atomic_flush = exynos_crtc_handle_event,
158};
159
160static void vidi_fake_vblank_timer(struct timer_list *t)
161{
162 struct vidi_context *ctx = from_timer(ctx, t, timer);
163
164 if (drm_crtc_handle_vblank(&ctx->crtc->base))
165 mod_timer(&ctx->timer,
166 jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1);
167}
168
169static ssize_t vidi_show_connection(struct device *dev,
170 struct device_attribute *attr, char *buf)
171{
172 struct vidi_context *ctx = dev_get_drvdata(dev);
173 int rc;
174
175 mutex_lock(&ctx->lock);
176
177 rc = sprintf(buf, "%d\n", ctx->connected);
178
179 mutex_unlock(&ctx->lock);
180
181 return rc;
182}
183
184static ssize_t vidi_store_connection(struct device *dev,
185 struct device_attribute *attr,
186 const char *buf, size_t len)
187{
188 struct vidi_context *ctx = dev_get_drvdata(dev);
189 int ret;
190
191 ret = kstrtoint(buf, 0, &ctx->connected);
192 if (ret)
193 return ret;
194
195 if (ctx->connected > 1)
196 return -EINVAL;
197
198 /*
199 * Use fake edid data for test. If raw_edid is set then it can't be
200 * tested.
201 */
202 if (ctx->raw_edid) {
203 DRM_DEV_DEBUG_KMS(dev, "edid data is not fake data.\n");
204 return -EINVAL;
205 }
206
207 DRM_DEV_DEBUG_KMS(dev, "requested connection.\n");
208
209 drm_helper_hpd_irq_event(ctx->drm_dev);
210
211 return len;
212}
213
214static DEVICE_ATTR(connection, 0644, vidi_show_connection,
215 vidi_store_connection);
216
217static struct attribute *vidi_attrs[] = {
218 &dev_attr_connection.attr,
219 NULL,
220};
221ATTRIBUTE_GROUPS(vidi);
222
223int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
224 struct drm_file *file_priv)
225{
226 struct vidi_context *ctx = dev_get_drvdata(drm_dev->dev);
227 struct drm_exynos_vidi_connection *vidi = data;
228
229 if (!vidi) {
230 DRM_DEV_DEBUG_KMS(ctx->dev,
231 "user data for vidi is null.\n");
232 return -EINVAL;
233 }
234
235 if (vidi->connection > 1) {
236 DRM_DEV_DEBUG_KMS(ctx->dev,
237 "connection should be 0 or 1.\n");
238 return -EINVAL;
239 }
240
241 if (ctx->connected == vidi->connection) {
242 DRM_DEV_DEBUG_KMS(ctx->dev,
243 "same connection request.\n");
244 return -EINVAL;
245 }
246
247 if (vidi->connection) {
248 const struct drm_edid *drm_edid;
249 const struct edid *raw_edid;
250 size_t size;
251
252 raw_edid = (const struct edid *)(unsigned long)vidi->edid;
253 size = (raw_edid->extensions + 1) * EDID_LENGTH;
254
255 drm_edid = drm_edid_alloc(raw_edid, size);
256 if (!drm_edid)
257 return -ENOMEM;
258
259 if (!drm_edid_valid(drm_edid)) {
260 drm_edid_free(drm_edid);
261 DRM_DEV_DEBUG_KMS(ctx->dev,
262 "edid data is invalid.\n");
263 return -EINVAL;
264 }
265 ctx->raw_edid = drm_edid;
266 } else {
267 /* with connection = 0, free raw_edid */
268 drm_edid_free(ctx->raw_edid);
269 ctx->raw_edid = NULL;
270 }
271
272 ctx->connected = vidi->connection;
273 drm_helper_hpd_irq_event(ctx->drm_dev);
274
275 return 0;
276}
277
278static enum drm_connector_status vidi_detect(struct drm_connector *connector,
279 bool force)
280{
281 struct vidi_context *ctx = ctx_from_connector(connector);
282
283 /*
284 * connection request would come from user side
285 * to do hotplug through specific ioctl.
286 */
287 return ctx->connected ? connector_status_connected :
288 connector_status_disconnected;
289}
290
291static void vidi_connector_destroy(struct drm_connector *connector)
292{
293}
294
295static const struct drm_connector_funcs vidi_connector_funcs = {
296 .fill_modes = drm_helper_probe_single_connector_modes,
297 .detect = vidi_detect,
298 .destroy = vidi_connector_destroy,
299 .reset = drm_atomic_helper_connector_reset,
300 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
301 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
302};
303
304static int vidi_get_modes(struct drm_connector *connector)
305{
306 struct vidi_context *ctx = ctx_from_connector(connector);
307 const struct drm_edid *drm_edid;
308 int count;
309
310 if (ctx->raw_edid)
311 drm_edid = drm_edid_dup(ctx->raw_edid);
312 else
313 drm_edid = drm_edid_alloc(fake_edid_info, sizeof(fake_edid_info));
314
315 if (!drm_edid)
316 return 0;
317
318 drm_edid_connector_update(connector, drm_edid);
319
320 count = drm_edid_connector_add_modes(connector);
321
322 drm_edid_free(drm_edid);
323
324 return count;
325}
326
327static const struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
328 .get_modes = vidi_get_modes,
329};
330
331static int vidi_create_connector(struct drm_encoder *encoder)
332{
333 struct vidi_context *ctx = encoder_to_vidi(encoder);
334 struct drm_connector *connector = &ctx->connector;
335 int ret;
336
337 connector->polled = DRM_CONNECTOR_POLL_HPD;
338
339 ret = drm_connector_init(ctx->drm_dev, connector,
340 &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
341 if (ret) {
342 DRM_DEV_ERROR(ctx->dev,
343 "Failed to initialize connector with drm\n");
344 return ret;
345 }
346
347 drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
348 drm_connector_attach_encoder(connector, encoder);
349
350 return 0;
351}
352
353static void exynos_vidi_mode_set(struct drm_encoder *encoder,
354 struct drm_display_mode *mode,
355 struct drm_display_mode *adjusted_mode)
356{
357}
358
359static void exynos_vidi_enable(struct drm_encoder *encoder)
360{
361}
362
363static void exynos_vidi_disable(struct drm_encoder *encoder)
364{
365}
366
367static const struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = {
368 .mode_set = exynos_vidi_mode_set,
369 .enable = exynos_vidi_enable,
370 .disable = exynos_vidi_disable,
371};
372
373static int vidi_bind(struct device *dev, struct device *master, void *data)
374{
375 struct vidi_context *ctx = dev_get_drvdata(dev);
376 struct drm_device *drm_dev = data;
377 struct drm_encoder *encoder = &ctx->encoder;
378 struct exynos_drm_plane *exynos_plane;
379 struct exynos_drm_plane_config plane_config = { 0 };
380 unsigned int i;
381 int ret;
382
383 ctx->drm_dev = drm_dev;
384
385 plane_config.pixel_formats = formats;
386 plane_config.num_pixel_formats = ARRAY_SIZE(formats);
387
388 for (i = 0; i < WINDOWS_NR; i++) {
389 plane_config.zpos = i;
390 plane_config.type = vidi_win_types[i];
391
392 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
393 &plane_config);
394 if (ret)
395 return ret;
396 }
397
398 exynos_plane = &ctx->planes[DEFAULT_WIN];
399 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
400 EXYNOS_DISPLAY_TYPE_VIDI, &vidi_crtc_ops, ctx);
401 if (IS_ERR(ctx->crtc)) {
402 DRM_DEV_ERROR(dev, "failed to create crtc.\n");
403 return PTR_ERR(ctx->crtc);
404 }
405
406 drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_TMDS);
407
408 drm_encoder_helper_add(encoder, &exynos_vidi_encoder_helper_funcs);
409
410 ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_VIDI);
411 if (ret < 0)
412 return ret;
413
414 ret = vidi_create_connector(encoder);
415 if (ret) {
416 DRM_DEV_ERROR(dev, "failed to create connector ret = %d\n",
417 ret);
418 drm_encoder_cleanup(encoder);
419 return ret;
420 }
421
422 return 0;
423}
424
425
426static void vidi_unbind(struct device *dev, struct device *master, void *data)
427{
428 struct vidi_context *ctx = dev_get_drvdata(dev);
429
430 del_timer_sync(&ctx->timer);
431}
432
433static const struct component_ops vidi_component_ops = {
434 .bind = vidi_bind,
435 .unbind = vidi_unbind,
436};
437
438static int vidi_probe(struct platform_device *pdev)
439{
440 struct vidi_context *ctx;
441 struct device *dev = &pdev->dev;
442
443 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
444 if (!ctx)
445 return -ENOMEM;
446
447 ctx->dev = dev;
448
449 timer_setup(&ctx->timer, vidi_fake_vblank_timer, 0);
450
451 mutex_init(&ctx->lock);
452
453 platform_set_drvdata(pdev, ctx);
454
455 return component_add(dev, &vidi_component_ops);
456}
457
458static void vidi_remove(struct platform_device *pdev)
459{
460 struct vidi_context *ctx = platform_get_drvdata(pdev);
461
462 drm_edid_free(ctx->raw_edid);
463 ctx->raw_edid = NULL;
464
465 component_del(&pdev->dev, &vidi_component_ops);
466}
467
468struct platform_driver vidi_driver = {
469 .probe = vidi_probe,
470 .remove = vidi_remove,
471 .driver = {
472 .name = "exynos-drm-vidi",
473 .dev_groups = vidi_groups,
474 },
475};
1// SPDX-License-Identifier: GPL-2.0-or-later
2/* exynos_drm_vidi.c
3 *
4 * Copyright (C) 2012 Samsung Electronics Co.Ltd
5 * Authors:
6 * Inki Dae <inki.dae@samsung.com>
7 */
8
9#include <linux/component.h>
10#include <linux/kernel.h>
11#include <linux/platform_device.h>
12#include <linux/timer.h>
13
14#include <drm/drm_atomic_helper.h>
15#include <drm/drm_edid.h>
16#include <drm/drm_framebuffer.h>
17#include <drm/drm_probe_helper.h>
18#include <drm/drm_simple_kms_helper.h>
19#include <drm/drm_vblank.h>
20#include <drm/exynos_drm.h>
21
22#include "exynos_drm_crtc.h"
23#include "exynos_drm_drv.h"
24#include "exynos_drm_fb.h"
25#include "exynos_drm_plane.h"
26#include "exynos_drm_vidi.h"
27
28/* VIDI uses fixed refresh rate of 50Hz */
29#define VIDI_REFRESH_TIME (1000 / 50)
30
31/* vidi has totally three virtual windows. */
32#define WINDOWS_NR 3
33
34#define ctx_from_connector(c) container_of(c, struct vidi_context, \
35 connector)
36
37struct vidi_context {
38 struct drm_encoder encoder;
39 struct drm_device *drm_dev;
40 struct device *dev;
41 struct exynos_drm_crtc *crtc;
42 struct drm_connector connector;
43 struct exynos_drm_plane planes[WINDOWS_NR];
44 struct edid *raw_edid;
45 unsigned int clkdiv;
46 unsigned int connected;
47 bool suspended;
48 struct timer_list timer;
49 struct mutex lock;
50};
51
52static inline struct vidi_context *encoder_to_vidi(struct drm_encoder *e)
53{
54 return container_of(e, struct vidi_context, encoder);
55}
56
57static const char fake_edid_info[] = {
58 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
59 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
60 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
61 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
62 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
63 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
64 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
65 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
66 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
67 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
68 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
69 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
70 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
71 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
72 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
73 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
74 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
75 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
76 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
77 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
78 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
79 0x00, 0x00, 0x00, 0x06
80};
81
82static const uint32_t formats[] = {
83 DRM_FORMAT_XRGB8888,
84 DRM_FORMAT_ARGB8888,
85 DRM_FORMAT_NV12,
86};
87
88static const enum drm_plane_type vidi_win_types[WINDOWS_NR] = {
89 DRM_PLANE_TYPE_PRIMARY,
90 DRM_PLANE_TYPE_OVERLAY,
91 DRM_PLANE_TYPE_CURSOR,
92};
93
94static int vidi_enable_vblank(struct exynos_drm_crtc *crtc)
95{
96 struct vidi_context *ctx = crtc->ctx;
97
98 if (ctx->suspended)
99 return -EPERM;
100
101 mod_timer(&ctx->timer,
102 jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1);
103
104 return 0;
105}
106
107static void vidi_disable_vblank(struct exynos_drm_crtc *crtc)
108{
109}
110
111static void vidi_update_plane(struct exynos_drm_crtc *crtc,
112 struct exynos_drm_plane *plane)
113{
114 struct drm_plane_state *state = plane->base.state;
115 struct vidi_context *ctx = crtc->ctx;
116 dma_addr_t addr;
117
118 if (ctx->suspended)
119 return;
120
121 addr = exynos_drm_fb_dma_addr(state->fb, 0);
122 DRM_DEV_DEBUG_KMS(ctx->dev, "dma_addr = %pad\n", &addr);
123}
124
125static void vidi_atomic_enable(struct exynos_drm_crtc *crtc)
126{
127 struct vidi_context *ctx = crtc->ctx;
128
129 mutex_lock(&ctx->lock);
130
131 ctx->suspended = false;
132
133 mutex_unlock(&ctx->lock);
134
135 drm_crtc_vblank_on(&crtc->base);
136}
137
138static void vidi_atomic_disable(struct exynos_drm_crtc *crtc)
139{
140 struct vidi_context *ctx = crtc->ctx;
141
142 drm_crtc_vblank_off(&crtc->base);
143
144 mutex_lock(&ctx->lock);
145
146 ctx->suspended = true;
147
148 mutex_unlock(&ctx->lock);
149}
150
151static const struct exynos_drm_crtc_ops vidi_crtc_ops = {
152 .atomic_enable = vidi_atomic_enable,
153 .atomic_disable = vidi_atomic_disable,
154 .enable_vblank = vidi_enable_vblank,
155 .disable_vblank = vidi_disable_vblank,
156 .update_plane = vidi_update_plane,
157 .atomic_flush = exynos_crtc_handle_event,
158};
159
160static void vidi_fake_vblank_timer(struct timer_list *t)
161{
162 struct vidi_context *ctx = from_timer(ctx, t, timer);
163
164 if (drm_crtc_handle_vblank(&ctx->crtc->base))
165 mod_timer(&ctx->timer,
166 jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1);
167}
168
169static ssize_t vidi_show_connection(struct device *dev,
170 struct device_attribute *attr, char *buf)
171{
172 struct vidi_context *ctx = dev_get_drvdata(dev);
173 int rc;
174
175 mutex_lock(&ctx->lock);
176
177 rc = sprintf(buf, "%d\n", ctx->connected);
178
179 mutex_unlock(&ctx->lock);
180
181 return rc;
182}
183
184static ssize_t vidi_store_connection(struct device *dev,
185 struct device_attribute *attr,
186 const char *buf, size_t len)
187{
188 struct vidi_context *ctx = dev_get_drvdata(dev);
189 int ret;
190
191 ret = kstrtoint(buf, 0, &ctx->connected);
192 if (ret)
193 return ret;
194
195 if (ctx->connected > 1)
196 return -EINVAL;
197
198 /* use fake edid data for test. */
199 if (!ctx->raw_edid)
200 ctx->raw_edid = (struct edid *)fake_edid_info;
201
202 /* if raw_edid isn't same as fake data then it can't be tested. */
203 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
204 DRM_DEV_DEBUG_KMS(dev, "edid data is not fake data.\n");
205 return -EINVAL;
206 }
207
208 DRM_DEV_DEBUG_KMS(dev, "requested connection.\n");
209
210 drm_helper_hpd_irq_event(ctx->drm_dev);
211
212 return len;
213}
214
215static DEVICE_ATTR(connection, 0644, vidi_show_connection,
216 vidi_store_connection);
217
218static struct attribute *vidi_attrs[] = {
219 &dev_attr_connection.attr,
220 NULL,
221};
222ATTRIBUTE_GROUPS(vidi);
223
224int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
225 struct drm_file *file_priv)
226{
227 struct vidi_context *ctx = dev_get_drvdata(drm_dev->dev);
228 struct drm_exynos_vidi_connection *vidi = data;
229
230 if (!vidi) {
231 DRM_DEV_DEBUG_KMS(ctx->dev,
232 "user data for vidi is null.\n");
233 return -EINVAL;
234 }
235
236 if (vidi->connection > 1) {
237 DRM_DEV_DEBUG_KMS(ctx->dev,
238 "connection should be 0 or 1.\n");
239 return -EINVAL;
240 }
241
242 if (ctx->connected == vidi->connection) {
243 DRM_DEV_DEBUG_KMS(ctx->dev,
244 "same connection request.\n");
245 return -EINVAL;
246 }
247
248 if (vidi->connection) {
249 struct edid *raw_edid;
250
251 raw_edid = (struct edid *)(unsigned long)vidi->edid;
252 if (!drm_edid_is_valid(raw_edid)) {
253 DRM_DEV_DEBUG_KMS(ctx->dev,
254 "edid data is invalid.\n");
255 return -EINVAL;
256 }
257 ctx->raw_edid = drm_edid_duplicate(raw_edid);
258 if (!ctx->raw_edid) {
259 DRM_DEV_DEBUG_KMS(ctx->dev,
260 "failed to allocate raw_edid.\n");
261 return -ENOMEM;
262 }
263 } else {
264 /*
265 * with connection = 0, free raw_edid
266 * only if raw edid data isn't same as fake data.
267 */
268 if (ctx->raw_edid && ctx->raw_edid !=
269 (struct edid *)fake_edid_info) {
270 kfree(ctx->raw_edid);
271 ctx->raw_edid = NULL;
272 }
273 }
274
275 ctx->connected = vidi->connection;
276 drm_helper_hpd_irq_event(ctx->drm_dev);
277
278 return 0;
279}
280
281static enum drm_connector_status vidi_detect(struct drm_connector *connector,
282 bool force)
283{
284 struct vidi_context *ctx = ctx_from_connector(connector);
285
286 /*
287 * connection request would come from user side
288 * to do hotplug through specific ioctl.
289 */
290 return ctx->connected ? connector_status_connected :
291 connector_status_disconnected;
292}
293
294static void vidi_connector_destroy(struct drm_connector *connector)
295{
296}
297
298static const struct drm_connector_funcs vidi_connector_funcs = {
299 .fill_modes = drm_helper_probe_single_connector_modes,
300 .detect = vidi_detect,
301 .destroy = vidi_connector_destroy,
302 .reset = drm_atomic_helper_connector_reset,
303 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
304 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
305};
306
307static int vidi_get_modes(struct drm_connector *connector)
308{
309 struct vidi_context *ctx = ctx_from_connector(connector);
310 struct edid *edid;
311 int edid_len;
312
313 /*
314 * the edid data comes from user side and it would be set
315 * to ctx->raw_edid through specific ioctl.
316 */
317 if (!ctx->raw_edid) {
318 DRM_DEV_DEBUG_KMS(ctx->dev, "raw_edid is null.\n");
319 return -EFAULT;
320 }
321
322 edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
323 edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
324 if (!edid) {
325 DRM_DEV_DEBUG_KMS(ctx->dev, "failed to allocate edid\n");
326 return -ENOMEM;
327 }
328
329 drm_connector_update_edid_property(connector, edid);
330
331 return drm_add_edid_modes(connector, edid);
332}
333
334static const struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
335 .get_modes = vidi_get_modes,
336};
337
338static int vidi_create_connector(struct drm_encoder *encoder)
339{
340 struct vidi_context *ctx = encoder_to_vidi(encoder);
341 struct drm_connector *connector = &ctx->connector;
342 int ret;
343
344 connector->polled = DRM_CONNECTOR_POLL_HPD;
345
346 ret = drm_connector_init(ctx->drm_dev, connector,
347 &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
348 if (ret) {
349 DRM_DEV_ERROR(ctx->dev,
350 "Failed to initialize connector with drm\n");
351 return ret;
352 }
353
354 drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
355 drm_connector_attach_encoder(connector, encoder);
356
357 return 0;
358}
359
360static void exynos_vidi_mode_set(struct drm_encoder *encoder,
361 struct drm_display_mode *mode,
362 struct drm_display_mode *adjusted_mode)
363{
364}
365
366static void exynos_vidi_enable(struct drm_encoder *encoder)
367{
368}
369
370static void exynos_vidi_disable(struct drm_encoder *encoder)
371{
372}
373
374static const struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = {
375 .mode_set = exynos_vidi_mode_set,
376 .enable = exynos_vidi_enable,
377 .disable = exynos_vidi_disable,
378};
379
380static int vidi_bind(struct device *dev, struct device *master, void *data)
381{
382 struct vidi_context *ctx = dev_get_drvdata(dev);
383 struct drm_device *drm_dev = data;
384 struct drm_encoder *encoder = &ctx->encoder;
385 struct exynos_drm_plane *exynos_plane;
386 struct exynos_drm_plane_config plane_config = { 0 };
387 unsigned int i;
388 int ret;
389
390 ctx->drm_dev = drm_dev;
391
392 plane_config.pixel_formats = formats;
393 plane_config.num_pixel_formats = ARRAY_SIZE(formats);
394
395 for (i = 0; i < WINDOWS_NR; i++) {
396 plane_config.zpos = i;
397 plane_config.type = vidi_win_types[i];
398
399 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
400 &plane_config);
401 if (ret)
402 return ret;
403 }
404
405 exynos_plane = &ctx->planes[DEFAULT_WIN];
406 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
407 EXYNOS_DISPLAY_TYPE_VIDI, &vidi_crtc_ops, ctx);
408 if (IS_ERR(ctx->crtc)) {
409 DRM_DEV_ERROR(dev, "failed to create crtc.\n");
410 return PTR_ERR(ctx->crtc);
411 }
412
413 drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_TMDS);
414
415 drm_encoder_helper_add(encoder, &exynos_vidi_encoder_helper_funcs);
416
417 ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_VIDI);
418 if (ret < 0)
419 return ret;
420
421 ret = vidi_create_connector(encoder);
422 if (ret) {
423 DRM_DEV_ERROR(dev, "failed to create connector ret = %d\n",
424 ret);
425 drm_encoder_cleanup(encoder);
426 return ret;
427 }
428
429 return 0;
430}
431
432
433static void vidi_unbind(struct device *dev, struct device *master, void *data)
434{
435 struct vidi_context *ctx = dev_get_drvdata(dev);
436
437 del_timer_sync(&ctx->timer);
438}
439
440static const struct component_ops vidi_component_ops = {
441 .bind = vidi_bind,
442 .unbind = vidi_unbind,
443};
444
445static int vidi_probe(struct platform_device *pdev)
446{
447 struct vidi_context *ctx;
448 struct device *dev = &pdev->dev;
449
450 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
451 if (!ctx)
452 return -ENOMEM;
453
454 ctx->dev = dev;
455
456 timer_setup(&ctx->timer, vidi_fake_vblank_timer, 0);
457
458 mutex_init(&ctx->lock);
459
460 platform_set_drvdata(pdev, ctx);
461
462 return component_add(dev, &vidi_component_ops);
463}
464
465static void vidi_remove(struct platform_device *pdev)
466{
467 struct vidi_context *ctx = platform_get_drvdata(pdev);
468
469 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
470 kfree(ctx->raw_edid);
471 ctx->raw_edid = NULL;
472 }
473
474 component_del(&pdev->dev, &vidi_component_ops);
475}
476
477struct platform_driver vidi_driver = {
478 .probe = vidi_probe,
479 .remove_new = vidi_remove,
480 .driver = {
481 .name = "exynos-drm-vidi",
482 .owner = THIS_MODULE,
483 .dev_groups = vidi_groups,
484 },
485};