3 * Copyright (C) 2012 Samsung Electronics Co.Ltd
5 * Inki Dae <inki.dae@samsung.com>
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.
15 #include <linux/kernel.h>
16 #include <linux/platform_device.h>
18 #include <drm/exynos_drm.h>
20 #include <drm/drm_edid.h>
21 #include <drm/drm_crtc_helper.h>
23 #include "exynos_drm_drv.h"
24 #include "exynos_drm_crtc.h"
25 #include "exynos_drm_encoder.h"
26 #include "exynos_drm_vidi.h"
28 /* vidi has totally three virtual windows. */
31 #define ctx_from_connector(c) container_of(c, struct vidi_context, \
34 struct vidi_win_data {
35 unsigned int offset_x;
36 unsigned int offset_y;
37 unsigned int ovl_width;
38 unsigned int ovl_height;
39 unsigned int fb_width;
40 unsigned int fb_height;
43 unsigned int buf_offsize;
44 unsigned int line_size; /* bytes */
49 struct exynos_drm_manager manager;
50 struct drm_device *drm_dev;
51 struct drm_crtc *crtc;
52 struct drm_encoder *encoder;
53 struct drm_connector connector;
54 struct exynos_drm_subdrv subdrv;
55 struct vidi_win_data win_data[WINDOWS_NR];
56 struct edid *raw_edid;
58 unsigned int default_win;
59 unsigned long irq_flags;
60 unsigned int connected;
64 struct work_struct work;
69 static inline struct vidi_context *manager_to_vidi(struct exynos_drm_manager *m)
71 return container_of(m, struct vidi_context, manager);
74 static const char fake_edid_info[] = {
75 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
76 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
77 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
78 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
79 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
80 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
81 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
82 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
83 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
84 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
85 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
86 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
87 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
88 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
89 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
90 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
91 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
92 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
93 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
94 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
95 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
96 0x00, 0x00, 0x00, 0x06
99 static void vidi_apply(struct exynos_drm_manager *mgr)
101 struct vidi_context *ctx = manager_to_vidi(mgr);
102 struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
103 struct vidi_win_data *win_data;
106 for (i = 0; i < WINDOWS_NR; i++) {
107 win_data = &ctx->win_data[i];
108 if (win_data->enabled && (mgr_ops && mgr_ops->win_commit))
109 mgr_ops->win_commit(mgr, i);
112 if (mgr_ops && mgr_ops->commit)
113 mgr_ops->commit(mgr);
116 static void vidi_commit(struct exynos_drm_manager *mgr)
118 struct vidi_context *ctx = manager_to_vidi(mgr);
124 static int vidi_enable_vblank(struct exynos_drm_manager *mgr)
126 struct vidi_context *ctx = manager_to_vidi(mgr);
131 if (!test_and_set_bit(0, &ctx->irq_flags))
132 ctx->vblank_on = true;
134 ctx->direct_vblank = true;
137 * in case of page flip request, vidi_finish_pageflip function
138 * will not be called because direct_vblank is true and then
139 * that function will be called by manager_ops->win_commit callback
141 schedule_work(&ctx->work);
146 static void vidi_disable_vblank(struct exynos_drm_manager *mgr)
148 struct vidi_context *ctx = manager_to_vidi(mgr);
153 if (test_and_clear_bit(0, &ctx->irq_flags))
154 ctx->vblank_on = false;
157 static void vidi_win_mode_set(struct exynos_drm_manager *mgr,
158 struct exynos_drm_overlay *overlay)
160 struct vidi_context *ctx = manager_to_vidi(mgr);
161 struct vidi_win_data *win_data;
163 unsigned long offset;
166 DRM_ERROR("overlay is NULL\n");
171 if (win == DEFAULT_ZPOS)
172 win = ctx->default_win;
174 if (win < 0 || win >= WINDOWS_NR)
177 offset = overlay->fb_x * (overlay->bpp >> 3);
178 offset += overlay->fb_y * overlay->pitch;
180 DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
182 win_data = &ctx->win_data[win];
184 win_data->offset_x = overlay->crtc_x;
185 win_data->offset_y = overlay->crtc_y;
186 win_data->ovl_width = overlay->crtc_width;
187 win_data->ovl_height = overlay->crtc_height;
188 win_data->fb_width = overlay->fb_width;
189 win_data->fb_height = overlay->fb_height;
190 win_data->dma_addr = overlay->dma_addr[0] + offset;
191 win_data->bpp = overlay->bpp;
192 win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
194 win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
197 * some parts of win_data should be transferred to user side
198 * through specific ioctl.
201 DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
202 win_data->offset_x, win_data->offset_y);
203 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
204 win_data->ovl_width, win_data->ovl_height);
205 DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
206 DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
207 overlay->fb_width, overlay->crtc_width);
210 static void vidi_win_commit(struct exynos_drm_manager *mgr, int zpos)
212 struct vidi_context *ctx = manager_to_vidi(mgr);
213 struct vidi_win_data *win_data;
219 if (win == DEFAULT_ZPOS)
220 win = ctx->default_win;
222 if (win < 0 || win >= WINDOWS_NR)
225 win_data = &ctx->win_data[win];
227 win_data->enabled = true;
229 DRM_DEBUG_KMS("dma_addr = %pad\n", &win_data->dma_addr);
232 schedule_work(&ctx->work);
235 static void vidi_win_disable(struct exynos_drm_manager *mgr, int zpos)
237 struct vidi_context *ctx = manager_to_vidi(mgr);
238 struct vidi_win_data *win_data;
241 if (win == DEFAULT_ZPOS)
242 win = ctx->default_win;
244 if (win < 0 || win >= WINDOWS_NR)
247 win_data = &ctx->win_data[win];
248 win_data->enabled = false;
253 static int vidi_power_on(struct exynos_drm_manager *mgr, bool enable)
255 struct vidi_context *ctx = manager_to_vidi(mgr);
257 DRM_DEBUG_KMS("%s\n", __FILE__);
259 if (enable != false && enable != true)
263 ctx->suspended = false;
265 /* if vblank was enabled status, enable it again. */
266 if (test_and_clear_bit(0, &ctx->irq_flags))
267 vidi_enable_vblank(mgr);
271 ctx->suspended = true;
277 static void vidi_dpms(struct exynos_drm_manager *mgr, int mode)
279 struct vidi_context *ctx = manager_to_vidi(mgr);
281 DRM_DEBUG_KMS("%d\n", mode);
283 mutex_lock(&ctx->lock);
286 case DRM_MODE_DPMS_ON:
287 vidi_power_on(mgr, true);
289 case DRM_MODE_DPMS_STANDBY:
290 case DRM_MODE_DPMS_SUSPEND:
291 case DRM_MODE_DPMS_OFF:
292 vidi_power_on(mgr, false);
295 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
299 mutex_unlock(&ctx->lock);
302 static int vidi_mgr_initialize(struct exynos_drm_manager *mgr,
303 struct drm_device *drm_dev)
305 struct vidi_context *ctx = manager_to_vidi(mgr);
306 struct exynos_drm_private *priv = drm_dev->dev_private;
308 mgr->drm_dev = ctx->drm_dev = drm_dev;
309 mgr->pipe = ctx->pipe = priv->pipe++;
314 static struct exynos_drm_manager_ops vidi_manager_ops = {
316 .commit = vidi_commit,
317 .enable_vblank = vidi_enable_vblank,
318 .disable_vblank = vidi_disable_vblank,
319 .win_mode_set = vidi_win_mode_set,
320 .win_commit = vidi_win_commit,
321 .win_disable = vidi_win_disable,
324 static void vidi_fake_vblank_handler(struct work_struct *work)
326 struct vidi_context *ctx = container_of(work, struct vidi_context,
332 /* refresh rate is about 50Hz. */
333 usleep_range(16000, 20000);
335 mutex_lock(&ctx->lock);
337 if (ctx->direct_vblank) {
338 drm_handle_vblank(ctx->drm_dev, ctx->pipe);
339 ctx->direct_vblank = false;
340 mutex_unlock(&ctx->lock);
344 mutex_unlock(&ctx->lock);
346 exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
349 static int vidi_show_connection(struct device *dev,
350 struct device_attribute *attr, char *buf)
352 struct vidi_context *ctx = dev_get_drvdata(dev);
355 mutex_lock(&ctx->lock);
357 rc = sprintf(buf, "%d\n", ctx->connected);
359 mutex_unlock(&ctx->lock);
364 static int vidi_store_connection(struct device *dev,
365 struct device_attribute *attr,
366 const char *buf, size_t len)
368 struct vidi_context *ctx = dev_get_drvdata(dev);
371 ret = kstrtoint(buf, 0, &ctx->connected);
375 if (ctx->connected > 1)
378 /* use fake edid data for test. */
380 ctx->raw_edid = (struct edid *)fake_edid_info;
382 /* if raw_edid isn't same as fake data then it can't be tested. */
383 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
384 DRM_DEBUG_KMS("edid data is not fake data.\n");
388 DRM_DEBUG_KMS("requested connection.\n");
390 drm_helper_hpd_irq_event(ctx->drm_dev);
395 static DEVICE_ATTR(connection, 0644, vidi_show_connection,
396 vidi_store_connection);
398 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
399 struct drm_file *file_priv)
401 struct vidi_context *ctx = NULL;
402 struct drm_encoder *encoder;
403 struct exynos_drm_display *display;
404 struct drm_exynos_vidi_connection *vidi = data;
407 DRM_DEBUG_KMS("user data for vidi is null.\n");
411 if (vidi->connection > 1) {
412 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
416 list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
418 display = exynos_drm_get_display(encoder);
420 if (display->type == EXYNOS_DISPLAY_TYPE_VIDI) {
427 DRM_DEBUG_KMS("not found virtual device type encoder.\n");
431 if (ctx->connected == vidi->connection) {
432 DRM_DEBUG_KMS("same connection request.\n");
436 if (vidi->connection) {
437 struct edid *raw_edid = (struct edid *)(uint32_t)vidi->edid;
438 if (!drm_edid_is_valid(raw_edid)) {
439 DRM_DEBUG_KMS("edid data is invalid.\n");
442 ctx->raw_edid = drm_edid_duplicate(raw_edid);
443 if (!ctx->raw_edid) {
444 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
449 * with connection = 0, free raw_edid
450 * only if raw edid data isn't same as fake data.
452 if (ctx->raw_edid && ctx->raw_edid !=
453 (struct edid *)fake_edid_info) {
454 kfree(ctx->raw_edid);
455 ctx->raw_edid = NULL;
459 ctx->connected = vidi->connection;
460 drm_helper_hpd_irq_event(ctx->drm_dev);
465 static enum drm_connector_status vidi_detect(struct drm_connector *connector,
468 struct vidi_context *ctx = ctx_from_connector(connector);
471 * connection request would come from user side
472 * to do hotplug through specific ioctl.
474 return ctx->connected ? connector_status_connected :
475 connector_status_disconnected;
478 static void vidi_connector_destroy(struct drm_connector *connector)
482 static struct drm_connector_funcs vidi_connector_funcs = {
483 .dpms = drm_helper_connector_dpms,
484 .fill_modes = drm_helper_probe_single_connector_modes,
485 .detect = vidi_detect,
486 .destroy = vidi_connector_destroy,
489 static int vidi_get_modes(struct drm_connector *connector)
491 struct vidi_context *ctx = ctx_from_connector(connector);
496 * the edid data comes from user side and it would be set
497 * to ctx->raw_edid through specific ioctl.
499 if (!ctx->raw_edid) {
500 DRM_DEBUG_KMS("raw_edid is null.\n");
504 edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
505 edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
507 DRM_DEBUG_KMS("failed to allocate edid\n");
511 drm_mode_connector_update_edid_property(connector, edid);
513 return drm_add_edid_modes(connector, edid);
516 static struct drm_encoder *vidi_best_encoder(struct drm_connector *connector)
518 struct vidi_context *ctx = ctx_from_connector(connector);
523 static struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
524 .get_modes = vidi_get_modes,
525 .best_encoder = vidi_best_encoder,
528 static int vidi_create_connector(struct exynos_drm_display *display,
529 struct drm_encoder *encoder)
531 struct vidi_context *ctx = display->ctx;
532 struct drm_connector *connector = &ctx->connector;
535 ctx->encoder = encoder;
536 connector->polled = DRM_CONNECTOR_POLL_HPD;
538 ret = drm_connector_init(ctx->drm_dev, connector,
539 &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
541 DRM_ERROR("Failed to initialize connector with drm\n");
545 drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
546 drm_connector_register(connector);
547 drm_mode_connector_attach_encoder(connector, encoder);
553 static struct exynos_drm_display_ops vidi_display_ops = {
554 .create_connector = vidi_create_connector,
557 static struct exynos_drm_display vidi_display = {
558 .type = EXYNOS_DISPLAY_TYPE_VIDI,
559 .ops = &vidi_display_ops,
562 static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
564 struct vidi_context *ctx = dev_get_drvdata(dev);
565 struct drm_crtc *crtc = ctx->crtc;
568 vidi_mgr_initialize(&ctx->manager, drm_dev);
570 ret = exynos_drm_crtc_create(&ctx->manager);
572 DRM_ERROR("failed to create crtc.\n");
576 ret = exynos_drm_create_enc_conn(drm_dev, &vidi_display);
578 crtc->funcs->destroy(crtc);
579 DRM_ERROR("failed to create encoder and connector.\n");
586 static int vidi_probe(struct platform_device *pdev)
588 struct exynos_drm_subdrv *subdrv;
589 struct vidi_context *ctx;
592 ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
596 ctx->manager.type = EXYNOS_DISPLAY_TYPE_VIDI;
597 ctx->manager.ops = &vidi_manager_ops;
598 ctx->default_win = 0;
600 INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
602 vidi_display.ctx = ctx;
604 mutex_init(&ctx->lock);
606 platform_set_drvdata(pdev, ctx);
608 subdrv = &ctx->subdrv;
609 subdrv->dev = &pdev->dev;
610 subdrv->probe = vidi_subdrv_probe;
612 ret = exynos_drm_subdrv_register(subdrv);
614 dev_err(&pdev->dev, "failed to register drm vidi device\n");
618 ret = device_create_file(&pdev->dev, &dev_attr_connection);
620 exynos_drm_subdrv_unregister(subdrv);
621 DRM_INFO("failed to create connection sysfs.\n");
627 static int vidi_remove(struct platform_device *pdev)
629 struct vidi_context *ctx = platform_get_drvdata(pdev);
631 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
632 kfree(ctx->raw_edid);
633 ctx->raw_edid = NULL;
641 struct platform_driver vidi_driver = {
643 .remove = vidi_remove,
645 .name = "exynos-drm-vidi",
646 .owner = THIS_MODULE,
650 int exynos_drm_probe_vidi(void)
652 struct platform_device *pdev;
655 pdev = platform_device_register_simple("exynos-drm-vidi", -1, NULL, 0);
657 return PTR_ERR(pdev);
659 ret = platform_driver_register(&vidi_driver);
661 platform_device_unregister(pdev);
668 static int exynos_drm_remove_vidi_device(struct device *dev, void *data)
670 platform_device_unregister(to_platform_device(dev));
675 void exynos_drm_remove_vidi(void)
677 int ret = driver_for_each_device(&vidi_driver.driver, NULL, NULL,
678 exynos_drm_remove_vidi_device);
679 /* silence compiler warning */
682 platform_driver_unregister(&vidi_driver);