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 const char fake_edid_info[] = {
70 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
71 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
72 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
73 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
74 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
75 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
76 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
77 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
78 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
79 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
80 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
81 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
82 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
83 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
84 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
85 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
86 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
87 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 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, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
91 0x00, 0x00, 0x00, 0x06
94 static void vidi_apply(struct exynos_drm_manager *mgr)
96 struct vidi_context *ctx = mgr->ctx;
97 struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
98 struct vidi_win_data *win_data;
101 for (i = 0; i < WINDOWS_NR; i++) {
102 win_data = &ctx->win_data[i];
103 if (win_data->enabled && (mgr_ops && mgr_ops->win_commit))
104 mgr_ops->win_commit(mgr, i);
107 if (mgr_ops && mgr_ops->commit)
108 mgr_ops->commit(mgr);
111 static void vidi_commit(struct exynos_drm_manager *mgr)
113 struct vidi_context *ctx = mgr->ctx;
119 static int vidi_enable_vblank(struct exynos_drm_manager *mgr)
121 struct vidi_context *ctx = mgr->ctx;
126 if (!test_and_set_bit(0, &ctx->irq_flags))
127 ctx->vblank_on = true;
129 ctx->direct_vblank = true;
132 * in case of page flip request, vidi_finish_pageflip function
133 * will not be called because direct_vblank is true and then
134 * that function will be called by manager_ops->win_commit callback
136 schedule_work(&ctx->work);
141 static void vidi_disable_vblank(struct exynos_drm_manager *mgr)
143 struct vidi_context *ctx = mgr->ctx;
148 if (test_and_clear_bit(0, &ctx->irq_flags))
149 ctx->vblank_on = false;
152 static void vidi_win_mode_set(struct exynos_drm_manager *mgr,
153 struct exynos_drm_overlay *overlay)
155 struct vidi_context *ctx = mgr->ctx;
156 struct vidi_win_data *win_data;
158 unsigned long offset;
161 DRM_ERROR("overlay is NULL\n");
166 if (win == DEFAULT_ZPOS)
167 win = ctx->default_win;
169 if (win < 0 || win >= WINDOWS_NR)
172 offset = overlay->fb_x * (overlay->bpp >> 3);
173 offset += overlay->fb_y * overlay->pitch;
175 DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
177 win_data = &ctx->win_data[win];
179 win_data->offset_x = overlay->crtc_x;
180 win_data->offset_y = overlay->crtc_y;
181 win_data->ovl_width = overlay->crtc_width;
182 win_data->ovl_height = overlay->crtc_height;
183 win_data->fb_width = overlay->fb_width;
184 win_data->fb_height = overlay->fb_height;
185 win_data->dma_addr = overlay->dma_addr[0] + offset;
186 win_data->bpp = overlay->bpp;
187 win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
189 win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
192 * some parts of win_data should be transferred to user side
193 * through specific ioctl.
196 DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
197 win_data->offset_x, win_data->offset_y);
198 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
199 win_data->ovl_width, win_data->ovl_height);
200 DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
201 DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
202 overlay->fb_width, overlay->crtc_width);
205 static void vidi_win_commit(struct exynos_drm_manager *mgr, int zpos)
207 struct vidi_context *ctx = mgr->ctx;
208 struct vidi_win_data *win_data;
214 if (win == DEFAULT_ZPOS)
215 win = ctx->default_win;
217 if (win < 0 || win >= WINDOWS_NR)
220 win_data = &ctx->win_data[win];
222 win_data->enabled = true;
224 DRM_DEBUG_KMS("dma_addr = %pad\n", &win_data->dma_addr);
227 schedule_work(&ctx->work);
230 static void vidi_win_disable(struct exynos_drm_manager *mgr, int zpos)
232 struct vidi_context *ctx = mgr->ctx;
233 struct vidi_win_data *win_data;
236 if (win == DEFAULT_ZPOS)
237 win = ctx->default_win;
239 if (win < 0 || win >= WINDOWS_NR)
242 win_data = &ctx->win_data[win];
243 win_data->enabled = false;
248 static int vidi_power_on(struct exynos_drm_manager *mgr, bool enable)
250 struct vidi_context *ctx = mgr->ctx;
252 DRM_DEBUG_KMS("%s\n", __FILE__);
254 if (enable != false && enable != true)
258 ctx->suspended = false;
260 /* if vblank was enabled status, enable it again. */
261 if (test_and_clear_bit(0, &ctx->irq_flags))
262 vidi_enable_vblank(mgr);
266 ctx->suspended = true;
272 static void vidi_dpms(struct exynos_drm_manager *mgr, int mode)
274 struct vidi_context *ctx = mgr->ctx;
276 DRM_DEBUG_KMS("%d\n", mode);
278 mutex_lock(&ctx->lock);
281 case DRM_MODE_DPMS_ON:
282 vidi_power_on(mgr, true);
284 case DRM_MODE_DPMS_STANDBY:
285 case DRM_MODE_DPMS_SUSPEND:
286 case DRM_MODE_DPMS_OFF:
287 vidi_power_on(mgr, false);
290 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
294 mutex_unlock(&ctx->lock);
297 static int vidi_mgr_initialize(struct exynos_drm_manager *mgr,
298 struct drm_device *drm_dev)
300 struct vidi_context *ctx = mgr->ctx;
301 struct exynos_drm_private *priv = drm_dev->dev_private;
303 mgr->drm_dev = ctx->drm_dev = drm_dev;
304 mgr->pipe = ctx->pipe = priv->pipe++;
309 static struct exynos_drm_manager_ops vidi_manager_ops = {
311 .commit = vidi_commit,
312 .enable_vblank = vidi_enable_vblank,
313 .disable_vblank = vidi_disable_vblank,
314 .win_mode_set = vidi_win_mode_set,
315 .win_commit = vidi_win_commit,
316 .win_disable = vidi_win_disable,
319 static void vidi_fake_vblank_handler(struct work_struct *work)
321 struct vidi_context *ctx = container_of(work, struct vidi_context,
327 /* refresh rate is about 50Hz. */
328 usleep_range(16000, 20000);
330 mutex_lock(&ctx->lock);
332 if (ctx->direct_vblank) {
333 drm_handle_vblank(ctx->drm_dev, ctx->pipe);
334 ctx->direct_vblank = false;
335 mutex_unlock(&ctx->lock);
339 mutex_unlock(&ctx->lock);
341 exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
344 static int vidi_show_connection(struct device *dev,
345 struct device_attribute *attr, char *buf)
347 struct vidi_context *ctx = dev_get_drvdata(dev);
350 mutex_lock(&ctx->lock);
352 rc = sprintf(buf, "%d\n", ctx->connected);
354 mutex_unlock(&ctx->lock);
359 static int vidi_store_connection(struct device *dev,
360 struct device_attribute *attr,
361 const char *buf, size_t len)
363 struct vidi_context *ctx = dev_get_drvdata(dev);
366 ret = kstrtoint(buf, 0, &ctx->connected);
370 if (ctx->connected > 1)
373 /* use fake edid data for test. */
375 ctx->raw_edid = (struct edid *)fake_edid_info;
377 /* if raw_edid isn't same as fake data then it can't be tested. */
378 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
379 DRM_DEBUG_KMS("edid data is not fake data.\n");
383 DRM_DEBUG_KMS("requested connection.\n");
385 drm_helper_hpd_irq_event(ctx->drm_dev);
390 static DEVICE_ATTR(connection, 0644, vidi_show_connection,
391 vidi_store_connection);
393 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
394 struct drm_file *file_priv)
396 struct vidi_context *ctx = NULL;
397 struct drm_encoder *encoder;
398 struct exynos_drm_display *display;
399 struct drm_exynos_vidi_connection *vidi = data;
402 DRM_DEBUG_KMS("user data for vidi is null.\n");
406 if (vidi->connection > 1) {
407 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
411 list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
413 display = exynos_drm_get_display(encoder);
415 if (display->type == EXYNOS_DISPLAY_TYPE_VIDI) {
422 DRM_DEBUG_KMS("not found virtual device type encoder.\n");
426 if (ctx->connected == vidi->connection) {
427 DRM_DEBUG_KMS("same connection request.\n");
431 if (vidi->connection) {
432 struct edid *raw_edid = (struct edid *)(uint32_t)vidi->edid;
433 if (!drm_edid_is_valid(raw_edid)) {
434 DRM_DEBUG_KMS("edid data is invalid.\n");
437 ctx->raw_edid = drm_edid_duplicate(raw_edid);
438 if (!ctx->raw_edid) {
439 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
444 * with connection = 0, free raw_edid
445 * only if raw edid data isn't same as fake data.
447 if (ctx->raw_edid && ctx->raw_edid !=
448 (struct edid *)fake_edid_info) {
449 kfree(ctx->raw_edid);
450 ctx->raw_edid = NULL;
454 ctx->connected = vidi->connection;
455 drm_helper_hpd_irq_event(ctx->drm_dev);
460 static enum drm_connector_status vidi_detect(struct drm_connector *connector,
463 struct vidi_context *ctx = ctx_from_connector(connector);
466 * connection request would come from user side
467 * to do hotplug through specific ioctl.
469 return ctx->connected ? connector_status_connected :
470 connector_status_disconnected;
473 static void vidi_connector_destroy(struct drm_connector *connector)
477 static struct drm_connector_funcs vidi_connector_funcs = {
478 .dpms = drm_helper_connector_dpms,
479 .fill_modes = drm_helper_probe_single_connector_modes,
480 .detect = vidi_detect,
481 .destroy = vidi_connector_destroy,
484 static int vidi_get_modes(struct drm_connector *connector)
486 struct vidi_context *ctx = ctx_from_connector(connector);
491 * the edid data comes from user side and it would be set
492 * to ctx->raw_edid through specific ioctl.
494 if (!ctx->raw_edid) {
495 DRM_DEBUG_KMS("raw_edid is null.\n");
499 edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
500 edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
502 DRM_DEBUG_KMS("failed to allocate edid\n");
506 drm_mode_connector_update_edid_property(connector, edid);
508 return drm_add_edid_modes(connector, edid);
511 static struct drm_encoder *vidi_best_encoder(struct drm_connector *connector)
513 struct vidi_context *ctx = ctx_from_connector(connector);
518 static struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
519 .get_modes = vidi_get_modes,
520 .best_encoder = vidi_best_encoder,
523 static int vidi_create_connector(struct exynos_drm_display *display,
524 struct drm_encoder *encoder)
526 struct vidi_context *ctx = display->ctx;
527 struct drm_connector *connector = &ctx->connector;
530 ctx->encoder = encoder;
531 connector->polled = DRM_CONNECTOR_POLL_HPD;
533 ret = drm_connector_init(ctx->drm_dev, connector,
534 &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
536 DRM_ERROR("Failed to initialize connector with drm\n");
540 drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
541 drm_connector_register(connector);
542 drm_mode_connector_attach_encoder(connector, encoder);
548 static struct exynos_drm_display_ops vidi_display_ops = {
549 .create_connector = vidi_create_connector,
552 static struct exynos_drm_display vidi_display = {
553 .type = EXYNOS_DISPLAY_TYPE_VIDI,
554 .ops = &vidi_display_ops,
557 static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
559 struct vidi_context *ctx = dev_get_drvdata(dev);
560 struct drm_crtc *crtc = ctx->crtc;
563 vidi_mgr_initialize(&ctx->manager, drm_dev);
565 ret = exynos_drm_crtc_create(&ctx->manager);
567 DRM_ERROR("failed to create crtc.\n");
571 ret = exynos_drm_create_enc_conn(drm_dev, &vidi_display);
573 crtc->funcs->destroy(crtc);
574 DRM_ERROR("failed to create encoder and connector.\n");
581 static int vidi_probe(struct platform_device *pdev)
583 struct exynos_drm_subdrv *subdrv;
584 struct vidi_context *ctx;
587 ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
591 ctx->manager.type = EXYNOS_DISPLAY_TYPE_VIDI;
592 ctx->manager.ops = &vidi_manager_ops;
593 ctx->default_win = 0;
595 INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
597 ctx->manager.ctx = ctx;
598 vidi_display.ctx = ctx;
600 mutex_init(&ctx->lock);
602 platform_set_drvdata(pdev, ctx);
604 subdrv = &ctx->subdrv;
605 subdrv->dev = &pdev->dev;
606 subdrv->probe = vidi_subdrv_probe;
608 ret = exynos_drm_subdrv_register(subdrv);
610 dev_err(&pdev->dev, "failed to register drm vidi device\n");
614 ret = device_create_file(&pdev->dev, &dev_attr_connection);
616 exynos_drm_subdrv_unregister(subdrv);
617 DRM_INFO("failed to create connection sysfs.\n");
623 static int vidi_remove(struct platform_device *pdev)
625 struct vidi_context *ctx = platform_get_drvdata(pdev);
627 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
628 kfree(ctx->raw_edid);
629 ctx->raw_edid = NULL;
637 struct platform_driver vidi_driver = {
639 .remove = vidi_remove,
641 .name = "exynos-drm-vidi",
642 .owner = THIS_MODULE,
646 int exynos_drm_probe_vidi(void)
648 struct platform_device *pdev;
651 pdev = platform_device_register_simple("exynos-drm-vidi", -1, NULL, 0);
653 return PTR_ERR(pdev);
655 ret = platform_driver_register(&vidi_driver);
657 platform_device_unregister(pdev);
664 static int exynos_drm_remove_vidi_device(struct device *dev, void *data)
666 platform_device_unregister(to_platform_device(dev));
671 void exynos_drm_remove_vidi(void)
673 int ret = driver_for_each_device(&vidi_driver.driver, NULL, NULL,
674 exynos_drm_remove_vidi_device);
675 /* silence compiler warning */
678 platform_driver_unregister(&vidi_driver);