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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/* exynos_drm_vidi.c
2 *
3 * Copyright (C) 2012 Samsung Electronics Co.Ltd
4 * Authors:
5 * Inki Dae <inki.dae@samsung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 */
13#include <drm/drmP.h>
14
15#include <linux/kernel.h>
16#include <linux/platform_device.h>
17
18#include <drm/exynos_drm.h>
19
20#include <drm/drm_edid.h>
21#include <drm/drm_crtc_helper.h>
22
23#include "exynos_drm_drv.h"
24#include "exynos_drm_crtc.h"
25#include "exynos_drm_encoder.h"
26#include "exynos_drm_vidi.h"
27
28/* vidi has totally three virtual windows. */
29#define WINDOWS_NR 3
30
31#define get_vidi_mgr(dev) platform_get_drvdata(to_platform_device(dev))
32#define ctx_from_connector(c) container_of(c, struct vidi_context, \
33 connector)
34
35struct vidi_win_data {
36 unsigned int offset_x;
37 unsigned int offset_y;
38 unsigned int ovl_width;
39 unsigned int ovl_height;
40 unsigned int fb_width;
41 unsigned int fb_height;
42 unsigned int bpp;
43 dma_addr_t dma_addr;
44 unsigned int buf_offsize;
45 unsigned int line_size; /* bytes */
46 bool enabled;
47};
48
49struct vidi_context {
50 struct drm_device *drm_dev;
51 struct drm_crtc *crtc;
52 struct drm_encoder *encoder;
53 struct drm_connector connector;
54 struct vidi_win_data win_data[WINDOWS_NR];
55 struct edid *raw_edid;
56 unsigned int clkdiv;
57 unsigned int default_win;
58 unsigned long irq_flags;
59 unsigned int connected;
60 bool vblank_on;
61 bool suspended;
62 bool direct_vblank;
63 struct work_struct work;
64 struct mutex lock;
65 int pipe;
66};
67
68static const char fake_edid_info[] = {
69 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
70 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
71 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
72 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
73 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
74 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
75 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
76 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
77 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
78 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
79 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
80 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
81 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
82 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
83 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
84 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
85 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
86 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
87 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
88 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
89 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
90 0x00, 0x00, 0x00, 0x06
91};
92
93static void vidi_apply(struct exynos_drm_manager *mgr)
94{
95 struct vidi_context *ctx = mgr->ctx;
96 struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
97 struct vidi_win_data *win_data;
98 int i;
99
100 for (i = 0; i < WINDOWS_NR; i++) {
101 win_data = &ctx->win_data[i];
102 if (win_data->enabled && (mgr_ops && mgr_ops->win_commit))
103 mgr_ops->win_commit(mgr, i);
104 }
105
106 if (mgr_ops && mgr_ops->commit)
107 mgr_ops->commit(mgr);
108}
109
110static void vidi_commit(struct exynos_drm_manager *mgr)
111{
112 struct vidi_context *ctx = mgr->ctx;
113
114 if (ctx->suspended)
115 return;
116}
117
118static int vidi_enable_vblank(struct exynos_drm_manager *mgr)
119{
120 struct vidi_context *ctx = mgr->ctx;
121
122 if (ctx->suspended)
123 return -EPERM;
124
125 if (!test_and_set_bit(0, &ctx->irq_flags))
126 ctx->vblank_on = true;
127
128 ctx->direct_vblank = true;
129
130 /*
131 * in case of page flip request, vidi_finish_pageflip function
132 * will not be called because direct_vblank is true and then
133 * that function will be called by manager_ops->win_commit callback
134 */
135 schedule_work(&ctx->work);
136
137 return 0;
138}
139
140static void vidi_disable_vblank(struct exynos_drm_manager *mgr)
141{
142 struct vidi_context *ctx = mgr->ctx;
143
144 if (ctx->suspended)
145 return;
146
147 if (test_and_clear_bit(0, &ctx->irq_flags))
148 ctx->vblank_on = false;
149}
150
151static void vidi_win_mode_set(struct exynos_drm_manager *mgr,
152 struct exynos_drm_overlay *overlay)
153{
154 struct vidi_context *ctx = mgr->ctx;
155 struct vidi_win_data *win_data;
156 int win;
157 unsigned long offset;
158
159 if (!overlay) {
160 DRM_ERROR("overlay is NULL\n");
161 return;
162 }
163
164 win = overlay->zpos;
165 if (win == DEFAULT_ZPOS)
166 win = ctx->default_win;
167
168 if (win < 0 || win >= WINDOWS_NR)
169 return;
170
171 offset = overlay->fb_x * (overlay->bpp >> 3);
172 offset += overlay->fb_y * overlay->pitch;
173
174 DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
175
176 win_data = &ctx->win_data[win];
177
178 win_data->offset_x = overlay->crtc_x;
179 win_data->offset_y = overlay->crtc_y;
180 win_data->ovl_width = overlay->crtc_width;
181 win_data->ovl_height = overlay->crtc_height;
182 win_data->fb_width = overlay->fb_width;
183 win_data->fb_height = overlay->fb_height;
184 win_data->dma_addr = overlay->dma_addr[0] + offset;
185 win_data->bpp = overlay->bpp;
186 win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
187 (overlay->bpp >> 3);
188 win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
189
190 /*
191 * some parts of win_data should be transferred to user side
192 * through specific ioctl.
193 */
194
195 DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
196 win_data->offset_x, win_data->offset_y);
197 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
198 win_data->ovl_width, win_data->ovl_height);
199 DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
200 DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
201 overlay->fb_width, overlay->crtc_width);
202}
203
204static void vidi_win_commit(struct exynos_drm_manager *mgr, int zpos)
205{
206 struct vidi_context *ctx = mgr->ctx;
207 struct vidi_win_data *win_data;
208 int win = zpos;
209
210 if (ctx->suspended)
211 return;
212
213 if (win == DEFAULT_ZPOS)
214 win = ctx->default_win;
215
216 if (win < 0 || win >= WINDOWS_NR)
217 return;
218
219 win_data = &ctx->win_data[win];
220
221 win_data->enabled = true;
222
223 DRM_DEBUG_KMS("dma_addr = %pad\n", &win_data->dma_addr);
224
225 if (ctx->vblank_on)
226 schedule_work(&ctx->work);
227}
228
229static void vidi_win_disable(struct exynos_drm_manager *mgr, int zpos)
230{
231 struct vidi_context *ctx = mgr->ctx;
232 struct vidi_win_data *win_data;
233 int win = zpos;
234
235 if (win == DEFAULT_ZPOS)
236 win = ctx->default_win;
237
238 if (win < 0 || win >= WINDOWS_NR)
239 return;
240
241 win_data = &ctx->win_data[win];
242 win_data->enabled = false;
243
244 /* TODO. */
245}
246
247static int vidi_power_on(struct exynos_drm_manager *mgr, bool enable)
248{
249 struct vidi_context *ctx = mgr->ctx;
250
251 DRM_DEBUG_KMS("%s\n", __FILE__);
252
253 if (enable != false && enable != true)
254 return -EINVAL;
255
256 if (enable) {
257 ctx->suspended = false;
258
259 /* if vblank was enabled status, enable it again. */
260 if (test_and_clear_bit(0, &ctx->irq_flags))
261 vidi_enable_vblank(mgr);
262
263 vidi_apply(mgr);
264 } else {
265 ctx->suspended = true;
266 }
267
268 return 0;
269}
270
271static void vidi_dpms(struct exynos_drm_manager *mgr, int mode)
272{
273 struct vidi_context *ctx = mgr->ctx;
274
275 DRM_DEBUG_KMS("%d\n", mode);
276
277 mutex_lock(&ctx->lock);
278
279 switch (mode) {
280 case DRM_MODE_DPMS_ON:
281 vidi_power_on(mgr, true);
282 break;
283 case DRM_MODE_DPMS_STANDBY:
284 case DRM_MODE_DPMS_SUSPEND:
285 case DRM_MODE_DPMS_OFF:
286 vidi_power_on(mgr, false);
287 break;
288 default:
289 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
290 break;
291 }
292
293 mutex_unlock(&ctx->lock);
294}
295
296static int vidi_mgr_initialize(struct exynos_drm_manager *mgr,
297 struct drm_device *drm_dev, int pipe)
298{
299 struct vidi_context *ctx = mgr->ctx;
300
301 DRM_ERROR("vidi initialize ct=%p dev=%p pipe=%d\n", ctx, drm_dev, pipe);
302
303 ctx->drm_dev = drm_dev;
304 ctx->pipe = pipe;
305
306 /*
307 * enable drm irq mode.
308 * - with irq_enabled = 1, we can use the vblank feature.
309 *
310 * P.S. note that we wouldn't use drm irq handler but
311 * just specific driver own one instead because
312 * drm framework supports only one irq handler.
313 */
314 drm_dev->irq_enabled = 1;
315
316 /*
317 * with vblank_disable_allowed = 1, vblank interrupt will be disabled
318 * by drm timer once a current process gives up ownership of
319 * vblank event.(after drm_vblank_put function is called)
320 */
321 drm_dev->vblank_disable_allowed = 1;
322
323 return 0;
324}
325
326static struct exynos_drm_manager_ops vidi_manager_ops = {
327 .initialize = vidi_mgr_initialize,
328 .dpms = vidi_dpms,
329 .commit = vidi_commit,
330 .enable_vblank = vidi_enable_vblank,
331 .disable_vblank = vidi_disable_vblank,
332 .win_mode_set = vidi_win_mode_set,
333 .win_commit = vidi_win_commit,
334 .win_disable = vidi_win_disable,
335};
336
337static struct exynos_drm_manager vidi_manager = {
338 .type = EXYNOS_DISPLAY_TYPE_VIDI,
339 .ops = &vidi_manager_ops,
340};
341
342static void vidi_fake_vblank_handler(struct work_struct *work)
343{
344 struct vidi_context *ctx = container_of(work, struct vidi_context,
345 work);
346
347 if (ctx->pipe < 0)
348 return;
349
350 /* refresh rate is about 50Hz. */
351 usleep_range(16000, 20000);
352
353 mutex_lock(&ctx->lock);
354
355 if (ctx->direct_vblank) {
356 drm_handle_vblank(ctx->drm_dev, ctx->pipe);
357 ctx->direct_vblank = false;
358 mutex_unlock(&ctx->lock);
359 return;
360 }
361
362 mutex_unlock(&ctx->lock);
363
364 exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
365}
366
367static int vidi_show_connection(struct device *dev,
368 struct device_attribute *attr, char *buf)
369{
370 int rc;
371 struct exynos_drm_manager *mgr = get_vidi_mgr(dev);
372 struct vidi_context *ctx = mgr->ctx;
373
374 mutex_lock(&ctx->lock);
375
376 rc = sprintf(buf, "%d\n", ctx->connected);
377
378 mutex_unlock(&ctx->lock);
379
380 return rc;
381}
382
383static int vidi_store_connection(struct device *dev,
384 struct device_attribute *attr,
385 const char *buf, size_t len)
386{
387 struct exynos_drm_manager *mgr = get_vidi_mgr(dev);
388 struct vidi_context *ctx = mgr->ctx;
389 int ret;
390
391 ret = kstrtoint(buf, 0, &ctx->connected);
392 if (ret)
393 return ret;
394
395 if (ctx->connected > 1)
396 return -EINVAL;
397
398 /* use fake edid data for test. */
399 if (!ctx->raw_edid)
400 ctx->raw_edid = (struct edid *)fake_edid_info;
401
402 /* if raw_edid isn't same as fake data then it can't be tested. */
403 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
404 DRM_DEBUG_KMS("edid data is not fake data.\n");
405 return -EINVAL;
406 }
407
408 DRM_DEBUG_KMS("requested connection.\n");
409
410 drm_helper_hpd_irq_event(ctx->drm_dev);
411
412 return len;
413}
414
415static DEVICE_ATTR(connection, 0644, vidi_show_connection,
416 vidi_store_connection);
417
418int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
419 struct drm_file *file_priv)
420{
421 struct vidi_context *ctx = NULL;
422 struct drm_encoder *encoder;
423 struct exynos_drm_display *display;
424 struct drm_exynos_vidi_connection *vidi = data;
425
426 if (!vidi) {
427 DRM_DEBUG_KMS("user data for vidi is null.\n");
428 return -EINVAL;
429 }
430
431 if (vidi->connection > 1) {
432 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
433 return -EINVAL;
434 }
435
436 list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
437 head) {
438 display = exynos_drm_get_display(encoder);
439
440 if (display->type == EXYNOS_DISPLAY_TYPE_VIDI) {
441 ctx = display->ctx;
442 break;
443 }
444 }
445
446 if (!ctx) {
447 DRM_DEBUG_KMS("not found virtual device type encoder.\n");
448 return -EINVAL;
449 }
450
451 if (ctx->connected == vidi->connection) {
452 DRM_DEBUG_KMS("same connection request.\n");
453 return -EINVAL;
454 }
455
456 if (vidi->connection) {
457 struct edid *raw_edid = (struct edid *)(uint32_t)vidi->edid;
458 if (!drm_edid_is_valid(raw_edid)) {
459 DRM_DEBUG_KMS("edid data is invalid.\n");
460 return -EINVAL;
461 }
462 ctx->raw_edid = drm_edid_duplicate(raw_edid);
463 if (!ctx->raw_edid) {
464 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
465 return -ENOMEM;
466 }
467 } else {
468 /*
469 * with connection = 0, free raw_edid
470 * only if raw edid data isn't same as fake data.
471 */
472 if (ctx->raw_edid && ctx->raw_edid !=
473 (struct edid *)fake_edid_info) {
474 kfree(ctx->raw_edid);
475 ctx->raw_edid = NULL;
476 }
477 }
478
479 ctx->connected = vidi->connection;
480 drm_helper_hpd_irq_event(ctx->drm_dev);
481
482 return 0;
483}
484
485static enum drm_connector_status vidi_detect(struct drm_connector *connector,
486 bool force)
487{
488 struct vidi_context *ctx = ctx_from_connector(connector);
489
490 /*
491 * connection request would come from user side
492 * to do hotplug through specific ioctl.
493 */
494 return ctx->connected ? connector_status_connected :
495 connector_status_disconnected;
496}
497
498static void vidi_connector_destroy(struct drm_connector *connector)
499{
500}
501
502static struct drm_connector_funcs vidi_connector_funcs = {
503 .dpms = drm_helper_connector_dpms,
504 .fill_modes = drm_helper_probe_single_connector_modes,
505 .detect = vidi_detect,
506 .destroy = vidi_connector_destroy,
507};
508
509static int vidi_get_modes(struct drm_connector *connector)
510{
511 struct vidi_context *ctx = ctx_from_connector(connector);
512 struct edid *edid;
513 int edid_len;
514
515 /*
516 * the edid data comes from user side and it would be set
517 * to ctx->raw_edid through specific ioctl.
518 */
519 if (!ctx->raw_edid) {
520 DRM_DEBUG_KMS("raw_edid is null.\n");
521 return -EFAULT;
522 }
523
524 edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
525 edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
526 if (!edid) {
527 DRM_DEBUG_KMS("failed to allocate edid\n");
528 return -ENOMEM;
529 }
530
531 drm_mode_connector_update_edid_property(connector, edid);
532
533 return drm_add_edid_modes(connector, edid);
534}
535
536static int vidi_mode_valid(struct drm_connector *connector,
537 struct drm_display_mode *mode)
538{
539 return MODE_OK;
540}
541
542static struct drm_encoder *vidi_best_encoder(struct drm_connector *connector)
543{
544 struct vidi_context *ctx = ctx_from_connector(connector);
545
546 return ctx->encoder;
547}
548
549static struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
550 .get_modes = vidi_get_modes,
551 .mode_valid = vidi_mode_valid,
552 .best_encoder = vidi_best_encoder,
553};
554
555static int vidi_create_connector(struct exynos_drm_display *display,
556 struct drm_encoder *encoder)
557{
558 struct vidi_context *ctx = display->ctx;
559 struct drm_connector *connector = &ctx->connector;
560 int ret;
561
562 ctx->encoder = encoder;
563 connector->polled = DRM_CONNECTOR_POLL_HPD;
564
565 ret = drm_connector_init(ctx->drm_dev, connector,
566 &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
567 if (ret) {
568 DRM_ERROR("Failed to initialize connector with drm\n");
569 return ret;
570 }
571
572 drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
573 drm_sysfs_connector_add(connector);
574 drm_mode_connector_attach_encoder(connector, encoder);
575
576 return 0;
577}
578
579
580static struct exynos_drm_display_ops vidi_display_ops = {
581 .create_connector = vidi_create_connector,
582};
583
584static struct exynos_drm_display vidi_display = {
585 .type = EXYNOS_DISPLAY_TYPE_VIDI,
586 .ops = &vidi_display_ops,
587};
588
589static int vidi_probe(struct platform_device *pdev)
590{
591 struct device *dev = &pdev->dev;
592 struct vidi_context *ctx;
593 int ret;
594
595 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
596 if (!ctx)
597 return -ENOMEM;
598
599 ctx->default_win = 0;
600
601 INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
602
603 vidi_manager.ctx = ctx;
604 vidi_display.ctx = ctx;
605
606 mutex_init(&ctx->lock);
607
608 platform_set_drvdata(pdev, &vidi_manager);
609
610 ret = device_create_file(dev, &dev_attr_connection);
611 if (ret < 0)
612 DRM_INFO("failed to create connection sysfs.\n");
613
614 exynos_drm_manager_register(&vidi_manager);
615 exynos_drm_display_register(&vidi_display);
616
617 return 0;
618}
619
620static int vidi_remove(struct platform_device *pdev)
621{
622 struct vidi_context *ctx = platform_get_drvdata(pdev);
623
624 exynos_drm_display_unregister(&vidi_display);
625 exynos_drm_manager_unregister(&vidi_manager);
626
627 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
628 kfree(ctx->raw_edid);
629 ctx->raw_edid = NULL;
630 }
631
632 return 0;
633}
634
635struct platform_driver vidi_driver = {
636 .probe = vidi_probe,
637 .remove = vidi_remove,
638 .driver = {
639 .name = "exynos-drm-vidi",
640 .owner = THIS_MODULE,
641 },
642};