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>
17 #include <linux/component.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"
27 #include "exynos_drm_vidi.h"
29 /* vidi has totally three virtual windows. */
32 #define ctx_from_connector(c) container_of(c, struct vidi_context, \
35 struct vidi_win_data {
36 unsigned int offset_x;
37 unsigned int offset_y;
38 unsigned int ovl_width;
39 unsigned int ovl_height;
40 unsigned int fb_width;
41 unsigned int fb_height;
44 unsigned int buf_offsize;
45 unsigned int line_size; /* bytes */
50 struct exynos_drm_display display;
51 struct platform_device *pdev;
52 struct drm_device *drm_dev;
53 struct exynos_drm_crtc *crtc;
54 struct drm_encoder *encoder;
55 struct drm_connector connector;
56 struct vidi_win_data win_data[WINDOWS_NR];
57 struct edid *raw_edid;
59 unsigned int default_win;
60 unsigned long irq_flags;
61 unsigned int connected;
65 struct work_struct work;
70 static inline struct vidi_context *display_to_vidi(struct exynos_drm_display *d)
72 return container_of(d, struct vidi_context, display);
75 static const char fake_edid_info[] = {
76 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
77 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
78 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
79 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
80 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
81 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
82 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
83 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
84 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
85 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
86 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
87 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
88 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
89 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
90 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
91 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
92 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
93 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 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, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
97 0x00, 0x00, 0x00, 0x06
100 static void vidi_apply(struct vidi_context *ctx)
102 struct exynos_drm_crtc_ops *crtc_ops = ctx->crtc->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 && (crtc_ops && crtc_ops->win_commit))
109 crtc_ops->win_commit(ctx->crtc, i);
113 static int vidi_enable_vblank(struct exynos_drm_crtc *crtc)
115 struct vidi_context *ctx = crtc->ctx;
120 if (!test_and_set_bit(0, &ctx->irq_flags))
121 ctx->vblank_on = true;
123 ctx->direct_vblank = true;
126 * in case of page flip request, vidi_finish_pageflip function
127 * will not be called because direct_vblank is true and then
128 * that function will be called by crtc_ops->win_commit callback
130 schedule_work(&ctx->work);
135 static void vidi_disable_vblank(struct exynos_drm_crtc *crtc)
137 struct vidi_context *ctx = crtc->ctx;
142 if (test_and_clear_bit(0, &ctx->irq_flags))
143 ctx->vblank_on = false;
146 static void vidi_win_mode_set(struct exynos_drm_crtc *crtc,
147 struct exynos_drm_plane *plane)
149 struct vidi_context *ctx = crtc->ctx;
150 struct vidi_win_data *win_data;
152 unsigned long offset;
155 DRM_ERROR("plane is NULL\n");
160 if (win == DEFAULT_ZPOS)
161 win = ctx->default_win;
163 if (win < 0 || win >= WINDOWS_NR)
166 offset = plane->fb_x * (plane->bpp >> 3);
167 offset += plane->fb_y * plane->pitch;
169 DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, plane->pitch);
171 win_data = &ctx->win_data[win];
173 win_data->offset_x = plane->crtc_x;
174 win_data->offset_y = plane->crtc_y;
175 win_data->ovl_width = plane->crtc_width;
176 win_data->ovl_height = plane->crtc_height;
177 win_data->fb_width = plane->fb_width;
178 win_data->fb_height = plane->fb_height;
179 win_data->dma_addr = plane->dma_addr[0] + offset;
180 win_data->bpp = plane->bpp;
181 win_data->buf_offsize = (plane->fb_width - plane->crtc_width) *
183 win_data->line_size = plane->crtc_width * (plane->bpp >> 3);
186 * some parts of win_data should be transferred to user side
187 * through specific ioctl.
190 DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
191 win_data->offset_x, win_data->offset_y);
192 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
193 win_data->ovl_width, win_data->ovl_height);
194 DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
195 DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
196 plane->fb_width, plane->crtc_width);
199 static void vidi_win_commit(struct exynos_drm_crtc *crtc, int zpos)
201 struct vidi_context *ctx = crtc->ctx;
202 struct vidi_win_data *win_data;
208 if (win == DEFAULT_ZPOS)
209 win = ctx->default_win;
211 if (win < 0 || win >= WINDOWS_NR)
214 win_data = &ctx->win_data[win];
216 win_data->enabled = true;
218 DRM_DEBUG_KMS("dma_addr = %pad\n", &win_data->dma_addr);
221 schedule_work(&ctx->work);
224 static void vidi_win_disable(struct exynos_drm_crtc *crtc, int zpos)
226 struct vidi_context *ctx = crtc->ctx;
227 struct vidi_win_data *win_data;
230 if (win == DEFAULT_ZPOS)
231 win = ctx->default_win;
233 if (win < 0 || win >= WINDOWS_NR)
236 win_data = &ctx->win_data[win];
237 win_data->enabled = false;
242 static int vidi_power_on(struct vidi_context *ctx, bool enable)
244 DRM_DEBUG_KMS("%s\n", __FILE__);
246 if (enable != false && enable != true)
250 ctx->suspended = false;
252 /* if vblank was enabled status, enable it again. */
253 if (test_and_clear_bit(0, &ctx->irq_flags))
254 vidi_enable_vblank(ctx->crtc);
258 ctx->suspended = true;
264 static void vidi_dpms(struct exynos_drm_crtc *crtc, int mode)
266 struct vidi_context *ctx = crtc->ctx;
268 DRM_DEBUG_KMS("%d\n", mode);
270 mutex_lock(&ctx->lock);
273 case DRM_MODE_DPMS_ON:
274 vidi_power_on(ctx, true);
276 case DRM_MODE_DPMS_STANDBY:
277 case DRM_MODE_DPMS_SUSPEND:
278 case DRM_MODE_DPMS_OFF:
279 vidi_power_on(ctx, false);
282 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
286 mutex_unlock(&ctx->lock);
289 static int vidi_ctx_initialize(struct vidi_context *ctx,
290 struct drm_device *drm_dev)
292 struct exynos_drm_private *priv = drm_dev->dev_private;
294 ctx->drm_dev = drm_dev;
295 ctx->pipe = priv->pipe++;
300 static struct exynos_drm_crtc_ops vidi_crtc_ops = {
302 .enable_vblank = vidi_enable_vblank,
303 .disable_vblank = vidi_disable_vblank,
304 .win_mode_set = vidi_win_mode_set,
305 .win_commit = vidi_win_commit,
306 .win_disable = vidi_win_disable,
309 static void vidi_fake_vblank_handler(struct work_struct *work)
311 struct vidi_context *ctx = container_of(work, struct vidi_context,
317 /* refresh rate is about 50Hz. */
318 usleep_range(16000, 20000);
320 mutex_lock(&ctx->lock);
322 if (ctx->direct_vblank) {
323 drm_handle_vblank(ctx->drm_dev, ctx->pipe);
324 ctx->direct_vblank = false;
325 mutex_unlock(&ctx->lock);
329 mutex_unlock(&ctx->lock);
331 exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
334 static int vidi_show_connection(struct device *dev,
335 struct device_attribute *attr, char *buf)
337 struct vidi_context *ctx = dev_get_drvdata(dev);
340 mutex_lock(&ctx->lock);
342 rc = sprintf(buf, "%d\n", ctx->connected);
344 mutex_unlock(&ctx->lock);
349 static int vidi_store_connection(struct device *dev,
350 struct device_attribute *attr,
351 const char *buf, size_t len)
353 struct vidi_context *ctx = dev_get_drvdata(dev);
356 ret = kstrtoint(buf, 0, &ctx->connected);
360 if (ctx->connected > 1)
363 /* use fake edid data for test. */
365 ctx->raw_edid = (struct edid *)fake_edid_info;
367 /* if raw_edid isn't same as fake data then it can't be tested. */
368 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
369 DRM_DEBUG_KMS("edid data is not fake data.\n");
373 DRM_DEBUG_KMS("requested connection.\n");
375 drm_helper_hpd_irq_event(ctx->drm_dev);
380 static DEVICE_ATTR(connection, 0644, vidi_show_connection,
381 vidi_store_connection);
383 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
384 struct drm_file *file_priv)
386 struct vidi_context *ctx = NULL;
387 struct drm_encoder *encoder;
388 struct exynos_drm_display *display;
389 struct drm_exynos_vidi_connection *vidi = data;
392 DRM_DEBUG_KMS("user data for vidi is null.\n");
396 if (vidi->connection > 1) {
397 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
401 list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
403 display = exynos_drm_get_display(encoder);
405 if (display->type == EXYNOS_DISPLAY_TYPE_VIDI) {
406 ctx = display_to_vidi(display);
412 DRM_DEBUG_KMS("not found virtual device type encoder.\n");
416 if (ctx->connected == vidi->connection) {
417 DRM_DEBUG_KMS("same connection request.\n");
421 if (vidi->connection) {
422 struct edid *raw_edid = (struct edid *)(uint32_t)vidi->edid;
423 if (!drm_edid_is_valid(raw_edid)) {
424 DRM_DEBUG_KMS("edid data is invalid.\n");
427 ctx->raw_edid = drm_edid_duplicate(raw_edid);
428 if (!ctx->raw_edid) {
429 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
434 * with connection = 0, free raw_edid
435 * only if raw edid data isn't same as fake data.
437 if (ctx->raw_edid && ctx->raw_edid !=
438 (struct edid *)fake_edid_info) {
439 kfree(ctx->raw_edid);
440 ctx->raw_edid = NULL;
444 ctx->connected = vidi->connection;
445 drm_helper_hpd_irq_event(ctx->drm_dev);
450 static enum drm_connector_status vidi_detect(struct drm_connector *connector,
453 struct vidi_context *ctx = ctx_from_connector(connector);
456 * connection request would come from user side
457 * to do hotplug through specific ioctl.
459 return ctx->connected ? connector_status_connected :
460 connector_status_disconnected;
463 static void vidi_connector_destroy(struct drm_connector *connector)
467 static struct drm_connector_funcs vidi_connector_funcs = {
468 .dpms = drm_helper_connector_dpms,
469 .fill_modes = drm_helper_probe_single_connector_modes,
470 .detect = vidi_detect,
471 .destroy = vidi_connector_destroy,
474 static int vidi_get_modes(struct drm_connector *connector)
476 struct vidi_context *ctx = ctx_from_connector(connector);
481 * the edid data comes from user side and it would be set
482 * to ctx->raw_edid through specific ioctl.
484 if (!ctx->raw_edid) {
485 DRM_DEBUG_KMS("raw_edid is null.\n");
489 edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
490 edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
492 DRM_DEBUG_KMS("failed to allocate edid\n");
496 drm_mode_connector_update_edid_property(connector, edid);
498 return drm_add_edid_modes(connector, edid);
501 static struct drm_encoder *vidi_best_encoder(struct drm_connector *connector)
503 struct vidi_context *ctx = ctx_from_connector(connector);
508 static struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
509 .get_modes = vidi_get_modes,
510 .best_encoder = vidi_best_encoder,
513 static int vidi_create_connector(struct exynos_drm_display *display,
514 struct drm_encoder *encoder)
516 struct vidi_context *ctx = display_to_vidi(display);
517 struct drm_connector *connector = &ctx->connector;
520 ctx->encoder = encoder;
521 connector->polled = DRM_CONNECTOR_POLL_HPD;
523 ret = drm_connector_init(ctx->drm_dev, connector,
524 &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
526 DRM_ERROR("Failed to initialize connector with drm\n");
530 drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
531 drm_connector_register(connector);
532 drm_mode_connector_attach_encoder(connector, encoder);
538 static struct exynos_drm_display_ops vidi_display_ops = {
539 .create_connector = vidi_create_connector,
542 static int vidi_bind(struct device *dev, struct device *master, void *data)
544 struct vidi_context *ctx = dev_get_drvdata(dev);
545 struct drm_device *drm_dev = data;
548 vidi_ctx_initialize(ctx, drm_dev);
550 ctx->crtc = exynos_drm_crtc_create(drm_dev, ctx->pipe,
551 EXYNOS_DISPLAY_TYPE_VIDI,
552 &vidi_crtc_ops, ctx);
553 if (IS_ERR(ctx->crtc)) {
554 DRM_ERROR("failed to create crtc.\n");
555 return PTR_ERR(ctx->crtc);
558 ret = exynos_drm_create_enc_conn(drm_dev, &ctx->display);
560 ctx->crtc->base.funcs->destroy(&ctx->crtc->base);
568 static void vidi_unbind(struct device *dev, struct device *master, void *data)
572 static const struct component_ops vidi_component_ops = {
574 .unbind = vidi_unbind,
577 static int vidi_probe(struct platform_device *pdev)
579 struct vidi_context *ctx;
582 ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
586 ctx->display.type = EXYNOS_DISPLAY_TYPE_VIDI;
587 ctx->display.ops = &vidi_display_ops;
588 ctx->default_win = 0;
591 ret = exynos_drm_component_add(&pdev->dev, EXYNOS_DEVICE_TYPE_CRTC,
592 EXYNOS_DISPLAY_TYPE_VIDI);
596 ret = exynos_drm_component_add(&pdev->dev, EXYNOS_DEVICE_TYPE_CONNECTOR,
599 goto err_del_crtc_component;
601 INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
603 mutex_init(&ctx->lock);
605 platform_set_drvdata(pdev, ctx);
607 ret = device_create_file(&pdev->dev, &dev_attr_connection);
609 DRM_ERROR("failed to create connection sysfs.\n");
610 goto err_del_conn_component;
613 ret = component_add(&pdev->dev, &vidi_component_ops);
615 goto err_remove_file;
620 device_remove_file(&pdev->dev, &dev_attr_connection);
621 err_del_conn_component:
622 exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CONNECTOR);
623 err_del_crtc_component:
624 exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CRTC);
629 static int vidi_remove(struct platform_device *pdev)
631 struct vidi_context *ctx = platform_get_drvdata(pdev);
633 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
634 kfree(ctx->raw_edid);
635 ctx->raw_edid = NULL;
640 component_del(&pdev->dev, &vidi_component_ops);
641 exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CONNECTOR);
642 exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CRTC);
647 struct platform_driver vidi_driver = {
649 .remove = vidi_remove,
651 .name = "exynos-drm-vidi",
652 .owner = THIS_MODULE,
656 int exynos_drm_probe_vidi(void)
658 struct platform_device *pdev;
661 pdev = platform_device_register_simple("exynos-drm-vidi", -1, NULL, 0);
663 return PTR_ERR(pdev);
665 ret = platform_driver_register(&vidi_driver);
667 platform_device_unregister(pdev);
674 static int exynos_drm_remove_vidi_device(struct device *dev, void *data)
676 platform_device_unregister(to_platform_device(dev));
681 void exynos_drm_remove_vidi(void)
683 int ret = driver_for_each_device(&vidi_driver.driver, NULL, NULL,
684 exynos_drm_remove_vidi_device);
685 /* silence compiler warning */
688 platform_driver_unregister(&vidi_driver);