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;
43 unsigned int buf_offsize;
44 unsigned int line_size; /* bytes */
49 struct exynos_drm_subdrv subdrv;
50 struct drm_crtc *crtc;
51 struct vidi_win_data win_data[WINDOWS_NR];
52 struct edid *raw_edid;
54 unsigned int default_win;
55 unsigned long irq_flags;
56 unsigned int connected;
60 struct work_struct work;
64 static const char fake_edid_info[] = {
65 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
66 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
67 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
68 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
69 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
70 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
71 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
72 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
73 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
74 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
75 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
76 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
77 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
78 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
79 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
80 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
81 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
82 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 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, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
86 0x00, 0x00, 0x00, 0x06
89 static bool vidi_display_is_connected(struct device *dev)
91 struct vidi_context *ctx = get_vidi_context(dev);
93 DRM_DEBUG_KMS("%s\n", __FILE__);
96 * connection request would come from user side
97 * to do hotplug through specific ioctl.
99 return ctx->connected ? true : false;
102 static int vidi_get_edid(struct device *dev, struct drm_connector *connector,
105 struct vidi_context *ctx = get_vidi_context(dev);
107 DRM_DEBUG_KMS("%s\n", __FILE__);
110 * the edid data comes from user side and it would be set
111 * to ctx->raw_edid through specific ioctl.
113 if (!ctx->raw_edid) {
114 DRM_DEBUG_KMS("raw_edid is null.\n");
118 memcpy(edid, ctx->raw_edid, min((1 + ctx->raw_edid->extensions)
119 * EDID_LENGTH, len));
124 static void *vidi_get_panel(struct device *dev)
126 DRM_DEBUG_KMS("%s\n", __FILE__);
133 static int vidi_check_timing(struct device *dev, void *timing)
135 DRM_DEBUG_KMS("%s\n", __FILE__);
142 static int vidi_display_power_on(struct device *dev, int mode)
144 DRM_DEBUG_KMS("%s\n", __FILE__);
151 static struct exynos_drm_display_ops vidi_display_ops = {
152 .type = EXYNOS_DISPLAY_TYPE_VIDI,
153 .is_connected = vidi_display_is_connected,
154 .get_edid = vidi_get_edid,
155 .get_panel = vidi_get_panel,
156 .check_timing = vidi_check_timing,
157 .power_on = vidi_display_power_on,
160 static void vidi_dpms(struct device *subdrv_dev, int mode)
162 struct vidi_context *ctx = get_vidi_context(subdrv_dev);
164 DRM_DEBUG_KMS("%s, %d\n", __FILE__, mode);
166 mutex_lock(&ctx->lock);
169 case DRM_MODE_DPMS_ON:
172 case DRM_MODE_DPMS_STANDBY:
173 case DRM_MODE_DPMS_SUSPEND:
174 case DRM_MODE_DPMS_OFF:
178 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
182 mutex_unlock(&ctx->lock);
185 static void vidi_apply(struct device *subdrv_dev)
187 struct vidi_context *ctx = get_vidi_context(subdrv_dev);
188 struct exynos_drm_manager *mgr = ctx->subdrv.manager;
189 struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
190 struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops;
191 struct vidi_win_data *win_data;
194 DRM_DEBUG_KMS("%s\n", __FILE__);
196 for (i = 0; i < WINDOWS_NR; i++) {
197 win_data = &ctx->win_data[i];
198 if (win_data->enabled && (ovl_ops && ovl_ops->commit))
199 ovl_ops->commit(subdrv_dev, i);
202 if (mgr_ops && mgr_ops->commit)
203 mgr_ops->commit(subdrv_dev);
206 static void vidi_commit(struct device *dev)
208 struct vidi_context *ctx = get_vidi_context(dev);
210 DRM_DEBUG_KMS("%s\n", __FILE__);
216 static int vidi_enable_vblank(struct device *dev)
218 struct vidi_context *ctx = get_vidi_context(dev);
220 DRM_DEBUG_KMS("%s\n", __FILE__);
225 if (!test_and_set_bit(0, &ctx->irq_flags))
226 ctx->vblank_on = true;
228 ctx->direct_vblank = true;
231 * in case of page flip request, vidi_finish_pageflip function
232 * will not be called because direct_vblank is true and then
233 * that function will be called by overlay_ops->commit callback
235 schedule_work(&ctx->work);
240 static void vidi_disable_vblank(struct device *dev)
242 struct vidi_context *ctx = get_vidi_context(dev);
244 DRM_DEBUG_KMS("%s\n", __FILE__);
249 if (test_and_clear_bit(0, &ctx->irq_flags))
250 ctx->vblank_on = false;
253 static struct exynos_drm_manager_ops vidi_manager_ops = {
256 .commit = vidi_commit,
257 .enable_vblank = vidi_enable_vblank,
258 .disable_vblank = vidi_disable_vblank,
261 static void vidi_win_mode_set(struct device *dev,
262 struct exynos_drm_overlay *overlay)
264 struct vidi_context *ctx = get_vidi_context(dev);
265 struct vidi_win_data *win_data;
267 unsigned long offset;
269 DRM_DEBUG_KMS("%s\n", __FILE__);
272 dev_err(dev, "overlay is NULL\n");
277 if (win == DEFAULT_ZPOS)
278 win = ctx->default_win;
280 if (win < 0 || win > WINDOWS_NR)
283 offset = overlay->fb_x * (overlay->bpp >> 3);
284 offset += overlay->fb_y * overlay->pitch;
286 DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
288 win_data = &ctx->win_data[win];
290 win_data->offset_x = overlay->crtc_x;
291 win_data->offset_y = overlay->crtc_y;
292 win_data->ovl_width = overlay->crtc_width;
293 win_data->ovl_height = overlay->crtc_height;
294 win_data->fb_width = overlay->fb_width;
295 win_data->fb_height = overlay->fb_height;
296 win_data->dma_addr = overlay->dma_addr[0] + offset;
297 win_data->vaddr = overlay->vaddr[0] + offset;
298 win_data->bpp = overlay->bpp;
299 win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
301 win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
304 * some parts of win_data should be transferred to user side
305 * through specific ioctl.
308 DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
309 win_data->offset_x, win_data->offset_y);
310 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
311 win_data->ovl_width, win_data->ovl_height);
312 DRM_DEBUG_KMS("paddr = 0x%lx, vaddr = 0x%lx\n",
313 (unsigned long)win_data->dma_addr,
314 (unsigned long)win_data->vaddr);
315 DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
316 overlay->fb_width, overlay->crtc_width);
319 static void vidi_win_commit(struct device *dev, int zpos)
321 struct vidi_context *ctx = get_vidi_context(dev);
322 struct vidi_win_data *win_data;
325 DRM_DEBUG_KMS("%s\n", __FILE__);
330 if (win == DEFAULT_ZPOS)
331 win = ctx->default_win;
333 if (win < 0 || win > WINDOWS_NR)
336 win_data = &ctx->win_data[win];
338 win_data->enabled = true;
340 DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data->dma_addr);
343 schedule_work(&ctx->work);
346 static void vidi_win_disable(struct device *dev, int zpos)
348 struct vidi_context *ctx = get_vidi_context(dev);
349 struct vidi_win_data *win_data;
352 DRM_DEBUG_KMS("%s\n", __FILE__);
354 if (win == DEFAULT_ZPOS)
355 win = ctx->default_win;
357 if (win < 0 || win > WINDOWS_NR)
360 win_data = &ctx->win_data[win];
361 win_data->enabled = false;
366 static struct exynos_drm_overlay_ops vidi_overlay_ops = {
367 .mode_set = vidi_win_mode_set,
368 .commit = vidi_win_commit,
369 .disable = vidi_win_disable,
372 static struct exynos_drm_manager vidi_manager = {
374 .ops = &vidi_manager_ops,
375 .overlay_ops = &vidi_overlay_ops,
376 .display_ops = &vidi_display_ops,
379 static void vidi_finish_pageflip(struct drm_device *drm_dev, int crtc)
381 struct exynos_drm_private *dev_priv = drm_dev->dev_private;
382 struct drm_pending_vblank_event *e, *t;
385 bool is_checked = false;
387 spin_lock_irqsave(&drm_dev->event_lock, flags);
389 list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list,
391 /* if event's pipe isn't same as crtc then ignore it. */
397 do_gettimeofday(&now);
398 e->event.sequence = 0;
399 e->event.tv_sec = now.tv_sec;
400 e->event.tv_usec = now.tv_usec;
402 list_move_tail(&e->base.link, &e->base.file_priv->event_list);
403 wake_up_interruptible(&e->base.file_priv->event_wait);
404 drm_vblank_put(drm_dev, crtc);
409 * don't off vblank if vblank_disable_allowed is 1,
410 * because vblank would be off by timer handler.
412 if (!drm_dev->vblank_disable_allowed)
413 drm_vblank_off(drm_dev, crtc);
416 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
419 static void vidi_fake_vblank_handler(struct work_struct *work)
421 struct vidi_context *ctx = container_of(work, struct vidi_context,
423 struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
424 struct exynos_drm_manager *manager = subdrv->manager;
426 if (manager->pipe < 0)
429 /* refresh rate is about 50Hz. */
430 usleep_range(16000, 20000);
432 mutex_lock(&ctx->lock);
434 if (ctx->direct_vblank) {
435 drm_handle_vblank(subdrv->drm_dev, manager->pipe);
436 ctx->direct_vblank = false;
437 mutex_unlock(&ctx->lock);
441 mutex_unlock(&ctx->lock);
443 vidi_finish_pageflip(subdrv->drm_dev, manager->pipe);
446 static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
448 DRM_DEBUG_KMS("%s\n", __FILE__);
451 * enable drm irq mode.
452 * - with irq_enabled = 1, we can use the vblank feature.
454 * P.S. note that we wouldn't use drm irq handler but
455 * just specific driver own one instead because
456 * drm framework supports only one irq handler.
458 drm_dev->irq_enabled = 1;
461 * with vblank_disable_allowed = 1, vblank interrupt will be disabled
462 * by drm timer once a current process gives up ownership of
463 * vblank event.(after drm_vblank_put function is called)
465 drm_dev->vblank_disable_allowed = 1;
470 static void vidi_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
472 DRM_DEBUG_KMS("%s\n", __FILE__);
477 static int vidi_power_on(struct vidi_context *ctx, bool enable)
479 struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
480 struct device *dev = subdrv->dev;
482 DRM_DEBUG_KMS("%s\n", __FILE__);
484 if (enable != false && enable != true)
488 ctx->suspended = false;
490 /* if vblank was enabled status, enable it again. */
491 if (test_and_clear_bit(0, &ctx->irq_flags))
492 vidi_enable_vblank(dev);
496 ctx->suspended = true;
502 static int vidi_show_connection(struct device *dev,
503 struct device_attribute *attr, char *buf)
506 struct vidi_context *ctx = get_vidi_context(dev);
508 mutex_lock(&ctx->lock);
510 rc = sprintf(buf, "%d\n", ctx->connected);
512 mutex_unlock(&ctx->lock);
517 static int vidi_store_connection(struct device *dev,
518 struct device_attribute *attr,
519 const char *buf, size_t len)
521 struct vidi_context *ctx = get_vidi_context(dev);
524 DRM_DEBUG_KMS("%s\n", __FILE__);
526 ret = kstrtoint(buf, 0, &ctx->connected);
530 if (ctx->connected > 1)
533 /* use fake edid data for test. */
535 ctx->raw_edid = (struct edid *)fake_edid_info;
537 /* if raw_edid isn't same as fake data then it can't be tested. */
538 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
539 DRM_DEBUG_KMS("edid data is not fake data.\n");
543 DRM_DEBUG_KMS("requested connection.\n");
545 drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
550 static DEVICE_ATTR(connection, 0644, vidi_show_connection,
551 vidi_store_connection);
553 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
554 struct drm_file *file_priv)
556 struct vidi_context *ctx = NULL;
557 struct drm_encoder *encoder;
558 struct exynos_drm_manager *manager;
559 struct exynos_drm_display_ops *display_ops;
560 struct drm_exynos_vidi_connection *vidi = data;
561 struct edid *raw_edid;
564 DRM_DEBUG_KMS("%s\n", __FILE__);
567 DRM_DEBUG_KMS("user data for vidi is null.\n");
571 if (vidi->connection > 1) {
572 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
576 list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
578 manager = exynos_drm_get_manager(encoder);
579 display_ops = manager->display_ops;
581 if (display_ops->type == EXYNOS_DISPLAY_TYPE_VIDI) {
582 ctx = get_vidi_context(manager->dev);
588 DRM_DEBUG_KMS("not found virtual device type encoder.\n");
592 if (ctx->connected == vidi->connection) {
593 DRM_DEBUG_KMS("same connection request.\n");
597 if (vidi->connection) {
599 DRM_DEBUG_KMS("edid data is null.\n");
602 raw_edid = (struct edid *)(uint32_t)vidi->edid;
603 edid_len = (1 + raw_edid->extensions) * EDID_LENGTH;
604 ctx->raw_edid = kzalloc(edid_len, GFP_KERNEL);
605 if (!ctx->raw_edid) {
606 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
609 memcpy(ctx->raw_edid, raw_edid, edid_len);
612 * with connection = 0, free raw_edid
613 * only if raw edid data isn't same as fake data.
615 if (ctx->raw_edid && ctx->raw_edid !=
616 (struct edid *)fake_edid_info) {
617 kfree(ctx->raw_edid);
618 ctx->raw_edid = NULL;
622 ctx->connected = vidi->connection;
623 drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
628 static int __devinit vidi_probe(struct platform_device *pdev)
630 struct device *dev = &pdev->dev;
631 struct vidi_context *ctx;
632 struct exynos_drm_subdrv *subdrv;
635 DRM_DEBUG_KMS("%s\n", __FILE__);
637 ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
641 ctx->default_win = 0;
643 INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
645 subdrv = &ctx->subdrv;
647 subdrv->manager = &vidi_manager;
648 subdrv->probe = vidi_subdrv_probe;
649 subdrv->remove = vidi_subdrv_remove;
651 mutex_init(&ctx->lock);
653 platform_set_drvdata(pdev, ctx);
655 ret = device_create_file(&pdev->dev, &dev_attr_connection);
657 DRM_INFO("failed to create connection sysfs.\n");
659 exynos_drm_subdrv_register(subdrv);
664 static int __devexit vidi_remove(struct platform_device *pdev)
666 struct vidi_context *ctx = platform_get_drvdata(pdev);
668 DRM_DEBUG_KMS("%s\n", __FILE__);
670 exynos_drm_subdrv_unregister(&ctx->subdrv);
672 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
673 kfree(ctx->raw_edid);
674 ctx->raw_edid = NULL;
680 #ifdef CONFIG_PM_SLEEP
681 static int vidi_suspend(struct device *dev)
683 struct vidi_context *ctx = get_vidi_context(dev);
685 return vidi_power_on(ctx, false);
688 static int vidi_resume(struct device *dev)
690 struct vidi_context *ctx = get_vidi_context(dev);
692 return vidi_power_on(ctx, true);
696 static const struct dev_pm_ops vidi_pm_ops = {
697 SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend, vidi_resume)
700 struct platform_driver vidi_driver = {
702 .remove = __devexit_p(vidi_remove),
704 .name = "exynos-drm-vidi",
705 .owner = THIS_MODULE,