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 struct edid *vidi_get_edid(struct device *dev,
102 struct drm_connector *connector)
104 struct vidi_context *ctx = get_vidi_context(dev);
108 DRM_DEBUG_KMS("%s\n", __FILE__);
111 * the edid data comes from user side and it would be set
112 * to ctx->raw_edid through specific ioctl.
114 if (!ctx->raw_edid) {
115 DRM_DEBUG_KMS("raw_edid is null.\n");
116 return ERR_PTR(-EFAULT);
119 edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
120 edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
122 DRM_DEBUG_KMS("failed to allocate edid\n");
123 return ERR_PTR(-ENOMEM);
129 static void *vidi_get_panel(struct device *dev)
131 DRM_DEBUG_KMS("%s\n", __FILE__);
138 static int vidi_check_timing(struct device *dev, void *timing)
140 DRM_DEBUG_KMS("%s\n", __FILE__);
147 static int vidi_display_power_on(struct device *dev, int mode)
149 DRM_DEBUG_KMS("%s\n", __FILE__);
156 static struct exynos_drm_display_ops vidi_display_ops = {
157 .type = EXYNOS_DISPLAY_TYPE_VIDI,
158 .is_connected = vidi_display_is_connected,
159 .get_edid = vidi_get_edid,
160 .get_panel = vidi_get_panel,
161 .check_timing = vidi_check_timing,
162 .power_on = vidi_display_power_on,
165 static void vidi_dpms(struct device *subdrv_dev, int mode)
167 struct vidi_context *ctx = get_vidi_context(subdrv_dev);
169 DRM_DEBUG_KMS("%s, %d\n", __FILE__, mode);
171 mutex_lock(&ctx->lock);
174 case DRM_MODE_DPMS_ON:
177 case DRM_MODE_DPMS_STANDBY:
178 case DRM_MODE_DPMS_SUSPEND:
179 case DRM_MODE_DPMS_OFF:
183 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
187 mutex_unlock(&ctx->lock);
190 static void vidi_apply(struct device *subdrv_dev)
192 struct vidi_context *ctx = get_vidi_context(subdrv_dev);
193 struct exynos_drm_manager *mgr = ctx->subdrv.manager;
194 struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
195 struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops;
196 struct vidi_win_data *win_data;
199 DRM_DEBUG_KMS("%s\n", __FILE__);
201 for (i = 0; i < WINDOWS_NR; i++) {
202 win_data = &ctx->win_data[i];
203 if (win_data->enabled && (ovl_ops && ovl_ops->commit))
204 ovl_ops->commit(subdrv_dev, i);
207 if (mgr_ops && mgr_ops->commit)
208 mgr_ops->commit(subdrv_dev);
211 static void vidi_commit(struct device *dev)
213 struct vidi_context *ctx = get_vidi_context(dev);
215 DRM_DEBUG_KMS("%s\n", __FILE__);
221 static int vidi_enable_vblank(struct device *dev)
223 struct vidi_context *ctx = get_vidi_context(dev);
225 DRM_DEBUG_KMS("%s\n", __FILE__);
230 if (!test_and_set_bit(0, &ctx->irq_flags))
231 ctx->vblank_on = true;
233 ctx->direct_vblank = true;
236 * in case of page flip request, vidi_finish_pageflip function
237 * will not be called because direct_vblank is true and then
238 * that function will be called by overlay_ops->commit callback
240 schedule_work(&ctx->work);
245 static void vidi_disable_vblank(struct device *dev)
247 struct vidi_context *ctx = get_vidi_context(dev);
249 DRM_DEBUG_KMS("%s\n", __FILE__);
254 if (test_and_clear_bit(0, &ctx->irq_flags))
255 ctx->vblank_on = false;
258 static struct exynos_drm_manager_ops vidi_manager_ops = {
261 .commit = vidi_commit,
262 .enable_vblank = vidi_enable_vblank,
263 .disable_vblank = vidi_disable_vblank,
266 static void vidi_win_mode_set(struct device *dev,
267 struct exynos_drm_overlay *overlay)
269 struct vidi_context *ctx = get_vidi_context(dev);
270 struct vidi_win_data *win_data;
272 unsigned long offset;
274 DRM_DEBUG_KMS("%s\n", __FILE__);
277 dev_err(dev, "overlay is NULL\n");
282 if (win == DEFAULT_ZPOS)
283 win = ctx->default_win;
285 if (win < 0 || win > WINDOWS_NR)
288 offset = overlay->fb_x * (overlay->bpp >> 3);
289 offset += overlay->fb_y * overlay->pitch;
291 DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
293 win_data = &ctx->win_data[win];
295 win_data->offset_x = overlay->crtc_x;
296 win_data->offset_y = overlay->crtc_y;
297 win_data->ovl_width = overlay->crtc_width;
298 win_data->ovl_height = overlay->crtc_height;
299 win_data->fb_width = overlay->fb_width;
300 win_data->fb_height = overlay->fb_height;
301 win_data->dma_addr = overlay->dma_addr[0] + offset;
302 win_data->bpp = overlay->bpp;
303 win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
305 win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
308 * some parts of win_data should be transferred to user side
309 * through specific ioctl.
312 DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
313 win_data->offset_x, win_data->offset_y);
314 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
315 win_data->ovl_width, win_data->ovl_height);
316 DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
317 DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
318 overlay->fb_width, overlay->crtc_width);
321 static void vidi_win_commit(struct device *dev, int zpos)
323 struct vidi_context *ctx = get_vidi_context(dev);
324 struct vidi_win_data *win_data;
327 DRM_DEBUG_KMS("%s\n", __FILE__);
332 if (win == DEFAULT_ZPOS)
333 win = ctx->default_win;
335 if (win < 0 || win > WINDOWS_NR)
338 win_data = &ctx->win_data[win];
340 win_data->enabled = true;
342 DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data->dma_addr);
345 schedule_work(&ctx->work);
348 static void vidi_win_disable(struct device *dev, int zpos)
350 struct vidi_context *ctx = get_vidi_context(dev);
351 struct vidi_win_data *win_data;
354 DRM_DEBUG_KMS("%s\n", __FILE__);
356 if (win == DEFAULT_ZPOS)
357 win = ctx->default_win;
359 if (win < 0 || win > WINDOWS_NR)
362 win_data = &ctx->win_data[win];
363 win_data->enabled = false;
368 static struct exynos_drm_overlay_ops vidi_overlay_ops = {
369 .mode_set = vidi_win_mode_set,
370 .commit = vidi_win_commit,
371 .disable = vidi_win_disable,
374 static struct exynos_drm_manager vidi_manager = {
376 .ops = &vidi_manager_ops,
377 .overlay_ops = &vidi_overlay_ops,
378 .display_ops = &vidi_display_ops,
381 static void vidi_fake_vblank_handler(struct work_struct *work)
383 struct vidi_context *ctx = container_of(work, struct vidi_context,
385 struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
386 struct exynos_drm_manager *manager = subdrv->manager;
388 if (manager->pipe < 0)
391 /* refresh rate is about 50Hz. */
392 usleep_range(16000, 20000);
394 mutex_lock(&ctx->lock);
396 if (ctx->direct_vblank) {
397 drm_handle_vblank(subdrv->drm_dev, manager->pipe);
398 ctx->direct_vblank = false;
399 mutex_unlock(&ctx->lock);
403 mutex_unlock(&ctx->lock);
405 exynos_drm_crtc_finish_pageflip(subdrv->drm_dev, manager->pipe);
408 static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
410 DRM_DEBUG_KMS("%s\n", __FILE__);
413 * enable drm irq mode.
414 * - with irq_enabled = 1, we can use the vblank feature.
416 * P.S. note that we wouldn't use drm irq handler but
417 * just specific driver own one instead because
418 * drm framework supports only one irq handler.
420 drm_dev->irq_enabled = 1;
423 * with vblank_disable_allowed = 1, vblank interrupt will be disabled
424 * by drm timer once a current process gives up ownership of
425 * vblank event.(after drm_vblank_put function is called)
427 drm_dev->vblank_disable_allowed = 1;
432 static void vidi_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
434 DRM_DEBUG_KMS("%s\n", __FILE__);
439 static int vidi_power_on(struct vidi_context *ctx, bool enable)
441 struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
442 struct device *dev = subdrv->dev;
444 DRM_DEBUG_KMS("%s\n", __FILE__);
446 if (enable != false && enable != true)
450 ctx->suspended = false;
452 /* if vblank was enabled status, enable it again. */
453 if (test_and_clear_bit(0, &ctx->irq_flags))
454 vidi_enable_vblank(dev);
458 ctx->suspended = true;
464 static int vidi_show_connection(struct device *dev,
465 struct device_attribute *attr, char *buf)
468 struct vidi_context *ctx = get_vidi_context(dev);
470 mutex_lock(&ctx->lock);
472 rc = sprintf(buf, "%d\n", ctx->connected);
474 mutex_unlock(&ctx->lock);
479 static int vidi_store_connection(struct device *dev,
480 struct device_attribute *attr,
481 const char *buf, size_t len)
483 struct vidi_context *ctx = get_vidi_context(dev);
486 DRM_DEBUG_KMS("%s\n", __FILE__);
488 ret = kstrtoint(buf, 0, &ctx->connected);
492 if (ctx->connected > 1)
495 /* use fake edid data for test. */
497 ctx->raw_edid = (struct edid *)fake_edid_info;
499 /* if raw_edid isn't same as fake data then it can't be tested. */
500 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
501 DRM_DEBUG_KMS("edid data is not fake data.\n");
505 DRM_DEBUG_KMS("requested connection.\n");
507 drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
512 static DEVICE_ATTR(connection, 0644, vidi_show_connection,
513 vidi_store_connection);
515 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
516 struct drm_file *file_priv)
518 struct vidi_context *ctx = NULL;
519 struct drm_encoder *encoder;
520 struct exynos_drm_manager *manager;
521 struct exynos_drm_display_ops *display_ops;
522 struct drm_exynos_vidi_connection *vidi = data;
525 DRM_DEBUG_KMS("%s\n", __FILE__);
528 DRM_DEBUG_KMS("user data for vidi is null.\n");
532 if (vidi->connection > 1) {
533 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
537 list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
539 manager = exynos_drm_get_manager(encoder);
540 display_ops = manager->display_ops;
542 if (display_ops->type == EXYNOS_DISPLAY_TYPE_VIDI) {
543 ctx = get_vidi_context(manager->dev);
549 DRM_DEBUG_KMS("not found virtual device type encoder.\n");
553 if (ctx->connected == vidi->connection) {
554 DRM_DEBUG_KMS("same connection request.\n");
558 if (vidi->connection) {
559 struct edid *raw_edid = (struct edid *)(uint32_t)vidi->edid;
560 if (!drm_edid_is_valid(raw_edid)) {
561 DRM_DEBUG_KMS("edid data is invalid.\n");
564 edid_len = (1 + raw_edid->extensions) * EDID_LENGTH;
565 ctx->raw_edid = kmemdup(raw_edid, edid_len, GFP_KERNEL);
566 if (!ctx->raw_edid) {
567 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
572 * with connection = 0, free raw_edid
573 * only if raw edid data isn't same as fake data.
575 if (ctx->raw_edid && ctx->raw_edid !=
576 (struct edid *)fake_edid_info) {
577 kfree(ctx->raw_edid);
578 ctx->raw_edid = NULL;
582 ctx->connected = vidi->connection;
583 drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
588 static int vidi_probe(struct platform_device *pdev)
590 struct device *dev = &pdev->dev;
591 struct vidi_context *ctx;
592 struct exynos_drm_subdrv *subdrv;
595 DRM_DEBUG_KMS("%s\n", __FILE__);
597 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
601 ctx->default_win = 0;
603 INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
605 subdrv = &ctx->subdrv;
607 subdrv->manager = &vidi_manager;
608 subdrv->probe = vidi_subdrv_probe;
609 subdrv->remove = vidi_subdrv_remove;
611 mutex_init(&ctx->lock);
613 platform_set_drvdata(pdev, ctx);
615 ret = device_create_file(dev, &dev_attr_connection);
617 DRM_INFO("failed to create connection sysfs.\n");
619 exynos_drm_subdrv_register(subdrv);
624 static int vidi_remove(struct platform_device *pdev)
626 struct vidi_context *ctx = platform_get_drvdata(pdev);
628 DRM_DEBUG_KMS("%s\n", __FILE__);
630 exynos_drm_subdrv_unregister(&ctx->subdrv);
632 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
633 kfree(ctx->raw_edid);
634 ctx->raw_edid = NULL;
640 #ifdef CONFIG_PM_SLEEP
641 static int vidi_suspend(struct device *dev)
643 struct vidi_context *ctx = get_vidi_context(dev);
645 return vidi_power_on(ctx, false);
648 static int vidi_resume(struct device *dev)
650 struct vidi_context *ctx = get_vidi_context(dev);
652 return vidi_power_on(ctx, true);
656 static const struct dev_pm_ops vidi_pm_ops = {
657 SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend, vidi_resume)
660 struct platform_driver vidi_driver = {
662 .remove = vidi_remove,
664 .name = "exynos-drm-vidi",
665 .owner = THIS_MODULE,