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/module.h>
17 #include <linux/platform_device.h>
19 #include <drm/exynos_drm.h>
21 #include <drm/drm_edid.h>
22 #include <drm/drm_crtc_helper.h>
24 #include "exynos_drm_drv.h"
25 #include "exynos_drm_crtc.h"
26 #include "exynos_drm_encoder.h"
28 /* vidi has totally three virtual windows. */
31 #define get_vidi_context(dev) platform_get_drvdata(to_platform_device(dev))
33 struct vidi_win_data {
34 unsigned int offset_x;
35 unsigned int offset_y;
36 unsigned int ovl_width;
37 unsigned int ovl_height;
38 unsigned int fb_width;
39 unsigned int fb_height;
42 unsigned int buf_offsize;
43 unsigned int line_size; /* bytes */
48 struct exynos_drm_subdrv subdrv;
49 struct drm_crtc *crtc;
50 struct vidi_win_data win_data[WINDOWS_NR];
51 struct edid *raw_edid;
53 unsigned int default_win;
54 unsigned long irq_flags;
55 unsigned int connected;
59 struct work_struct work;
63 static const char fake_edid_info[] = {
64 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
65 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
66 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
67 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
68 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
69 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
70 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
71 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
72 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
73 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
74 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
75 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
76 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
77 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
78 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
79 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
80 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
81 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
82 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
83 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
84 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
85 0x00, 0x00, 0x00, 0x06
88 static bool vidi_display_is_connected(struct device *dev)
90 struct vidi_context *ctx = get_vidi_context(dev);
92 DRM_DEBUG_KMS("%s\n", __FILE__);
95 * connection request would come from user side
96 * to do hotplug through specific ioctl.
98 return ctx->connected ? true : false;
101 static int vidi_get_edid(struct device *dev, struct drm_connector *connector,
104 struct vidi_context *ctx = get_vidi_context(dev);
106 DRM_DEBUG_KMS("%s\n", __FILE__);
109 * the edid data comes from user side and it would be set
110 * to ctx->raw_edid through specific ioctl.
112 if (!ctx->raw_edid) {
113 DRM_DEBUG_KMS("raw_edid is null.\n");
117 memcpy(edid, ctx->raw_edid, min((1 + ctx->raw_edid->extensions)
118 * EDID_LENGTH, len));
123 static void *vidi_get_panel(struct device *dev)
125 DRM_DEBUG_KMS("%s\n", __FILE__);
132 static int vidi_check_timing(struct device *dev, void *timing)
134 DRM_DEBUG_KMS("%s\n", __FILE__);
141 static int vidi_display_power_on(struct device *dev, int mode)
143 DRM_DEBUG_KMS("%s\n", __FILE__);
150 static struct exynos_drm_display_ops vidi_display_ops = {
151 .type = EXYNOS_DISPLAY_TYPE_VIDI,
152 .is_connected = vidi_display_is_connected,
153 .get_edid = vidi_get_edid,
154 .get_panel = vidi_get_panel,
155 .check_timing = vidi_check_timing,
156 .power_on = vidi_display_power_on,
159 static void vidi_dpms(struct device *subdrv_dev, int mode)
161 struct vidi_context *ctx = get_vidi_context(subdrv_dev);
163 DRM_DEBUG_KMS("%s, %d\n", __FILE__, mode);
165 mutex_lock(&ctx->lock);
168 case DRM_MODE_DPMS_ON:
171 case DRM_MODE_DPMS_STANDBY:
172 case DRM_MODE_DPMS_SUSPEND:
173 case DRM_MODE_DPMS_OFF:
177 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
181 mutex_unlock(&ctx->lock);
184 static void vidi_apply(struct device *subdrv_dev)
186 struct vidi_context *ctx = get_vidi_context(subdrv_dev);
187 struct exynos_drm_manager *mgr = ctx->subdrv.manager;
188 struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
189 struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops;
190 struct vidi_win_data *win_data;
193 DRM_DEBUG_KMS("%s\n", __FILE__);
195 for (i = 0; i < WINDOWS_NR; i++) {
196 win_data = &ctx->win_data[i];
197 if (win_data->enabled && (ovl_ops && ovl_ops->commit))
198 ovl_ops->commit(subdrv_dev, i);
201 if (mgr_ops && mgr_ops->commit)
202 mgr_ops->commit(subdrv_dev);
205 static void vidi_commit(struct device *dev)
207 struct vidi_context *ctx = get_vidi_context(dev);
209 DRM_DEBUG_KMS("%s\n", __FILE__);
215 static int vidi_enable_vblank(struct device *dev)
217 struct vidi_context *ctx = get_vidi_context(dev);
219 DRM_DEBUG_KMS("%s\n", __FILE__);
224 if (!test_and_set_bit(0, &ctx->irq_flags))
225 ctx->vblank_on = true;
227 ctx->direct_vblank = true;
230 * in case of page flip request, vidi_finish_pageflip function
231 * will not be called because direct_vblank is true and then
232 * that function will be called by overlay_ops->commit callback
234 schedule_work(&ctx->work);
239 static void vidi_disable_vblank(struct device *dev)
241 struct vidi_context *ctx = get_vidi_context(dev);
243 DRM_DEBUG_KMS("%s\n", __FILE__);
248 if (test_and_clear_bit(0, &ctx->irq_flags))
249 ctx->vblank_on = false;
252 static struct exynos_drm_manager_ops vidi_manager_ops = {
255 .commit = vidi_commit,
256 .enable_vblank = vidi_enable_vblank,
257 .disable_vblank = vidi_disable_vblank,
260 static void vidi_win_mode_set(struct device *dev,
261 struct exynos_drm_overlay *overlay)
263 struct vidi_context *ctx = get_vidi_context(dev);
264 struct vidi_win_data *win_data;
266 unsigned long offset;
268 DRM_DEBUG_KMS("%s\n", __FILE__);
271 dev_err(dev, "overlay is NULL\n");
276 if (win == DEFAULT_ZPOS)
277 win = ctx->default_win;
279 if (win < 0 || win > WINDOWS_NR)
282 offset = overlay->fb_x * (overlay->bpp >> 3);
283 offset += overlay->fb_y * overlay->pitch;
285 DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
287 win_data = &ctx->win_data[win];
289 win_data->offset_x = overlay->crtc_x;
290 win_data->offset_y = overlay->crtc_y;
291 win_data->ovl_width = overlay->crtc_width;
292 win_data->ovl_height = overlay->crtc_height;
293 win_data->fb_width = overlay->fb_width;
294 win_data->fb_height = overlay->fb_height;
295 win_data->dma_addr = overlay->dma_addr[0] + offset;
296 win_data->bpp = overlay->bpp;
297 win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
299 win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
302 * some parts of win_data should be transferred to user side
303 * through specific ioctl.
306 DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
307 win_data->offset_x, win_data->offset_y);
308 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
309 win_data->ovl_width, win_data->ovl_height);
310 DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
311 DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
312 overlay->fb_width, overlay->crtc_width);
315 static void vidi_win_commit(struct device *dev, int zpos)
317 struct vidi_context *ctx = get_vidi_context(dev);
318 struct vidi_win_data *win_data;
321 DRM_DEBUG_KMS("%s\n", __FILE__);
326 if (win == DEFAULT_ZPOS)
327 win = ctx->default_win;
329 if (win < 0 || win > WINDOWS_NR)
332 win_data = &ctx->win_data[win];
334 win_data->enabled = true;
336 DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data->dma_addr);
339 schedule_work(&ctx->work);
342 static void vidi_win_disable(struct device *dev, int zpos)
344 struct vidi_context *ctx = get_vidi_context(dev);
345 struct vidi_win_data *win_data;
348 DRM_DEBUG_KMS("%s\n", __FILE__);
350 if (win == DEFAULT_ZPOS)
351 win = ctx->default_win;
353 if (win < 0 || win > WINDOWS_NR)
356 win_data = &ctx->win_data[win];
357 win_data->enabled = false;
362 static struct exynos_drm_overlay_ops vidi_overlay_ops = {
363 .mode_set = vidi_win_mode_set,
364 .commit = vidi_win_commit,
365 .disable = vidi_win_disable,
368 static struct exynos_drm_manager vidi_manager = {
370 .ops = &vidi_manager_ops,
371 .overlay_ops = &vidi_overlay_ops,
372 .display_ops = &vidi_display_ops,
375 static void vidi_finish_pageflip(struct drm_device *drm_dev, int crtc)
377 struct exynos_drm_private *dev_priv = drm_dev->dev_private;
378 struct drm_pending_vblank_event *e, *t;
382 spin_lock_irqsave(&drm_dev->event_lock, flags);
384 list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list,
386 /* if event's pipe isn't same as crtc then ignore it. */
390 do_gettimeofday(&now);
391 e->event.sequence = 0;
392 e->event.tv_sec = now.tv_sec;
393 e->event.tv_usec = now.tv_usec;
395 list_move_tail(&e->base.link, &e->base.file_priv->event_list);
396 wake_up_interruptible(&e->base.file_priv->event_wait);
397 drm_vblank_put(drm_dev, crtc);
400 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
403 static void vidi_fake_vblank_handler(struct work_struct *work)
405 struct vidi_context *ctx = container_of(work, struct vidi_context,
407 struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
408 struct exynos_drm_manager *manager = subdrv->manager;
410 if (manager->pipe < 0)
413 /* refresh rate is about 50Hz. */
414 usleep_range(16000, 20000);
416 mutex_lock(&ctx->lock);
418 if (ctx->direct_vblank) {
419 drm_handle_vblank(subdrv->drm_dev, manager->pipe);
420 ctx->direct_vblank = false;
421 mutex_unlock(&ctx->lock);
425 mutex_unlock(&ctx->lock);
427 vidi_finish_pageflip(subdrv->drm_dev, manager->pipe);
430 static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
432 DRM_DEBUG_KMS("%s\n", __FILE__);
435 * enable drm irq mode.
436 * - with irq_enabled = 1, we can use the vblank feature.
438 * P.S. note that we wouldn't use drm irq handler but
439 * just specific driver own one instead because
440 * drm framework supports only one irq handler.
442 drm_dev->irq_enabled = 1;
445 * with vblank_disable_allowed = 1, vblank interrupt will be disabled
446 * by drm timer once a current process gives up ownership of
447 * vblank event.(after drm_vblank_put function is called)
449 drm_dev->vblank_disable_allowed = 1;
454 static void vidi_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
456 DRM_DEBUG_KMS("%s\n", __FILE__);
461 static int vidi_power_on(struct vidi_context *ctx, bool enable)
463 struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
464 struct device *dev = subdrv->dev;
466 DRM_DEBUG_KMS("%s\n", __FILE__);
468 if (enable != false && enable != true)
472 ctx->suspended = false;
474 /* if vblank was enabled status, enable it again. */
475 if (test_and_clear_bit(0, &ctx->irq_flags))
476 vidi_enable_vblank(dev);
480 ctx->suspended = true;
486 static int vidi_show_connection(struct device *dev,
487 struct device_attribute *attr, char *buf)
490 struct vidi_context *ctx = get_vidi_context(dev);
492 mutex_lock(&ctx->lock);
494 rc = sprintf(buf, "%d\n", ctx->connected);
496 mutex_unlock(&ctx->lock);
501 static int vidi_store_connection(struct device *dev,
502 struct device_attribute *attr,
503 const char *buf, size_t len)
505 struct vidi_context *ctx = get_vidi_context(dev);
508 DRM_DEBUG_KMS("%s\n", __FILE__);
510 ret = kstrtoint(buf, 0, &ctx->connected);
514 if (ctx->connected > 1)
517 /* use fake edid data for test. */
519 ctx->raw_edid = (struct edid *)fake_edid_info;
521 /* if raw_edid isn't same as fake data then it can't be tested. */
522 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
523 DRM_DEBUG_KMS("edid data is not fake data.\n");
527 DRM_DEBUG_KMS("requested connection.\n");
529 drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
534 static DEVICE_ATTR(connection, 0644, vidi_show_connection,
535 vidi_store_connection);
537 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
538 struct drm_file *file_priv)
540 struct vidi_context *ctx = NULL;
541 struct drm_encoder *encoder;
542 struct exynos_drm_manager *manager;
543 struct exynos_drm_display_ops *display_ops;
544 struct drm_exynos_vidi_connection *vidi = data;
545 struct edid *raw_edid;
548 DRM_DEBUG_KMS("%s\n", __FILE__);
551 DRM_DEBUG_KMS("user data for vidi is null.\n");
555 if (vidi->connection > 1) {
556 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
560 list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
562 manager = exynos_drm_get_manager(encoder);
563 display_ops = manager->display_ops;
565 if (display_ops->type == EXYNOS_DISPLAY_TYPE_VIDI) {
566 ctx = get_vidi_context(manager->dev);
572 DRM_DEBUG_KMS("not found virtual device type encoder.\n");
576 if (ctx->connected == vidi->connection) {
577 DRM_DEBUG_KMS("same connection request.\n");
581 if (vidi->connection) {
583 DRM_DEBUG_KMS("edid data is null.\n");
586 raw_edid = (struct edid *)(uint32_t)vidi->edid;
587 edid_len = (1 + raw_edid->extensions) * EDID_LENGTH;
588 ctx->raw_edid = kzalloc(edid_len, GFP_KERNEL);
589 if (!ctx->raw_edid) {
590 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
593 memcpy(ctx->raw_edid, raw_edid, edid_len);
596 * with connection = 0, free raw_edid
597 * only if raw edid data isn't same as fake data.
599 if (ctx->raw_edid && ctx->raw_edid !=
600 (struct edid *)fake_edid_info) {
601 kfree(ctx->raw_edid);
602 ctx->raw_edid = NULL;
606 ctx->connected = vidi->connection;
607 drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
612 static int __devinit vidi_probe(struct platform_device *pdev)
614 struct device *dev = &pdev->dev;
615 struct vidi_context *ctx;
616 struct exynos_drm_subdrv *subdrv;
619 DRM_DEBUG_KMS("%s\n", __FILE__);
621 ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
625 ctx->default_win = 0;
627 INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
629 subdrv = &ctx->subdrv;
631 subdrv->manager = &vidi_manager;
632 subdrv->probe = vidi_subdrv_probe;
633 subdrv->remove = vidi_subdrv_remove;
635 mutex_init(&ctx->lock);
637 platform_set_drvdata(pdev, ctx);
639 ret = device_create_file(&pdev->dev, &dev_attr_connection);
641 DRM_INFO("failed to create connection sysfs.\n");
643 exynos_drm_subdrv_register(subdrv);
648 static int __devexit vidi_remove(struct platform_device *pdev)
650 struct vidi_context *ctx = platform_get_drvdata(pdev);
652 DRM_DEBUG_KMS("%s\n", __FILE__);
654 exynos_drm_subdrv_unregister(&ctx->subdrv);
656 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
657 kfree(ctx->raw_edid);
658 ctx->raw_edid = NULL;
664 #ifdef CONFIG_PM_SLEEP
665 static int vidi_suspend(struct device *dev)
667 struct vidi_context *ctx = get_vidi_context(dev);
669 return vidi_power_on(ctx, false);
672 static int vidi_resume(struct device *dev)
674 struct vidi_context *ctx = get_vidi_context(dev);
676 return vidi_power_on(ctx, true);
680 static const struct dev_pm_ops vidi_pm_ops = {
681 SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend, vidi_resume)
684 struct platform_driver vidi_driver = {
686 .remove = __devexit_p(vidi_remove),
688 .name = "exynos-drm-vidi",
689 .owner = THIS_MODULE,