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 get_vidi_mgr(dev) platform_get_drvdata(to_platform_device(dev))
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 drm_device *drm_dev;
51 struct drm_crtc *crtc;
52 struct drm_encoder *encoder;
53 struct drm_connector connector;
54 struct vidi_win_data win_data[WINDOWS_NR];
55 struct edid *raw_edid;
57 unsigned int default_win;
58 unsigned long irq_flags;
59 unsigned int connected;
63 struct work_struct work;
68 static const char fake_edid_info[] = {
69 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
70 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
71 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
72 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
73 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
74 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
75 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
76 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
77 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
78 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
79 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
80 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
81 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
82 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
83 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
84 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
85 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
86 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
87 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 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, 0x06
93 static void vidi_apply(struct exynos_drm_manager *mgr)
95 struct vidi_context *ctx = mgr->ctx;
96 struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
97 struct vidi_win_data *win_data;
100 for (i = 0; i < WINDOWS_NR; i++) {
101 win_data = &ctx->win_data[i];
102 if (win_data->enabled && (mgr_ops && mgr_ops->win_commit))
103 mgr_ops->win_commit(mgr, i);
106 if (mgr_ops && mgr_ops->commit)
107 mgr_ops->commit(mgr);
110 static void vidi_commit(struct exynos_drm_manager *mgr)
112 struct vidi_context *ctx = mgr->ctx;
118 static int vidi_enable_vblank(struct exynos_drm_manager *mgr)
120 struct vidi_context *ctx = mgr->ctx;
125 if (!test_and_set_bit(0, &ctx->irq_flags))
126 ctx->vblank_on = true;
128 ctx->direct_vblank = true;
131 * in case of page flip request, vidi_finish_pageflip function
132 * will not be called because direct_vblank is true and then
133 * that function will be called by manager_ops->win_commit callback
135 schedule_work(&ctx->work);
140 static void vidi_disable_vblank(struct exynos_drm_manager *mgr)
142 struct vidi_context *ctx = mgr->ctx;
147 if (test_and_clear_bit(0, &ctx->irq_flags))
148 ctx->vblank_on = false;
151 static void vidi_win_mode_set(struct exynos_drm_manager *mgr,
152 struct exynos_drm_overlay *overlay)
154 struct vidi_context *ctx = mgr->ctx;
155 struct vidi_win_data *win_data;
157 unsigned long offset;
160 DRM_ERROR("overlay is NULL\n");
165 if (win == DEFAULT_ZPOS)
166 win = ctx->default_win;
168 if (win < 0 || win >= WINDOWS_NR)
171 offset = overlay->fb_x * (overlay->bpp >> 3);
172 offset += overlay->fb_y * overlay->pitch;
174 DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
176 win_data = &ctx->win_data[win];
178 win_data->offset_x = overlay->crtc_x;
179 win_data->offset_y = overlay->crtc_y;
180 win_data->ovl_width = overlay->crtc_width;
181 win_data->ovl_height = overlay->crtc_height;
182 win_data->fb_width = overlay->fb_width;
183 win_data->fb_height = overlay->fb_height;
184 win_data->dma_addr = overlay->dma_addr[0] + offset;
185 win_data->bpp = overlay->bpp;
186 win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
188 win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
191 * some parts of win_data should be transferred to user side
192 * through specific ioctl.
195 DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
196 win_data->offset_x, win_data->offset_y);
197 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
198 win_data->ovl_width, win_data->ovl_height);
199 DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
200 DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
201 overlay->fb_width, overlay->crtc_width);
204 static void vidi_win_commit(struct exynos_drm_manager *mgr, int zpos)
206 struct vidi_context *ctx = mgr->ctx;
207 struct vidi_win_data *win_data;
213 if (win == DEFAULT_ZPOS)
214 win = ctx->default_win;
216 if (win < 0 || win >= WINDOWS_NR)
219 win_data = &ctx->win_data[win];
221 win_data->enabled = true;
223 DRM_DEBUG_KMS("dma_addr = %pad\n", &win_data->dma_addr);
226 schedule_work(&ctx->work);
229 static void vidi_win_disable(struct exynos_drm_manager *mgr, int zpos)
231 struct vidi_context *ctx = mgr->ctx;
232 struct vidi_win_data *win_data;
235 if (win == DEFAULT_ZPOS)
236 win = ctx->default_win;
238 if (win < 0 || win >= WINDOWS_NR)
241 win_data = &ctx->win_data[win];
242 win_data->enabled = false;
247 static int vidi_power_on(struct exynos_drm_manager *mgr, bool enable)
249 struct vidi_context *ctx = mgr->ctx;
251 DRM_DEBUG_KMS("%s\n", __FILE__);
253 if (enable != false && enable != true)
257 ctx->suspended = false;
259 /* if vblank was enabled status, enable it again. */
260 if (test_and_clear_bit(0, &ctx->irq_flags))
261 vidi_enable_vblank(mgr);
265 ctx->suspended = true;
271 static void vidi_dpms(struct exynos_drm_manager *mgr, int mode)
273 struct vidi_context *ctx = mgr->ctx;
275 DRM_DEBUG_KMS("%d\n", mode);
277 mutex_lock(&ctx->lock);
280 case DRM_MODE_DPMS_ON:
281 vidi_power_on(mgr, true);
283 case DRM_MODE_DPMS_STANDBY:
284 case DRM_MODE_DPMS_SUSPEND:
285 case DRM_MODE_DPMS_OFF:
286 vidi_power_on(mgr, false);
289 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
293 mutex_unlock(&ctx->lock);
296 static int vidi_mgr_initialize(struct exynos_drm_manager *mgr,
297 struct drm_device *drm_dev, int pipe)
299 struct vidi_context *ctx = mgr->ctx;
301 DRM_ERROR("vidi initialize ct=%p dev=%p pipe=%d\n", ctx, drm_dev, pipe);
303 ctx->drm_dev = drm_dev;
307 * enable drm irq mode.
308 * - with irq_enabled = 1, we can use the vblank feature.
310 * P.S. note that we wouldn't use drm irq handler but
311 * just specific driver own one instead because
312 * drm framework supports only one irq handler.
314 drm_dev->irq_enabled = 1;
317 * with vblank_disable_allowed = 1, vblank interrupt will be disabled
318 * by drm timer once a current process gives up ownership of
319 * vblank event.(after drm_vblank_put function is called)
321 drm_dev->vblank_disable_allowed = 1;
326 static struct exynos_drm_manager_ops vidi_manager_ops = {
327 .initialize = vidi_mgr_initialize,
329 .commit = vidi_commit,
330 .enable_vblank = vidi_enable_vblank,
331 .disable_vblank = vidi_disable_vblank,
332 .win_mode_set = vidi_win_mode_set,
333 .win_commit = vidi_win_commit,
334 .win_disable = vidi_win_disable,
337 static struct exynos_drm_manager vidi_manager = {
338 .type = EXYNOS_DISPLAY_TYPE_VIDI,
339 .ops = &vidi_manager_ops,
342 static void vidi_fake_vblank_handler(struct work_struct *work)
344 struct vidi_context *ctx = container_of(work, struct vidi_context,
350 /* refresh rate is about 50Hz. */
351 usleep_range(16000, 20000);
353 mutex_lock(&ctx->lock);
355 if (ctx->direct_vblank) {
356 drm_handle_vblank(ctx->drm_dev, ctx->pipe);
357 ctx->direct_vblank = false;
358 mutex_unlock(&ctx->lock);
362 mutex_unlock(&ctx->lock);
364 exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
367 static int vidi_show_connection(struct device *dev,
368 struct device_attribute *attr, char *buf)
371 struct exynos_drm_manager *mgr = get_vidi_mgr(dev);
372 struct vidi_context *ctx = mgr->ctx;
374 mutex_lock(&ctx->lock);
376 rc = sprintf(buf, "%d\n", ctx->connected);
378 mutex_unlock(&ctx->lock);
383 static int vidi_store_connection(struct device *dev,
384 struct device_attribute *attr,
385 const char *buf, size_t len)
387 struct exynos_drm_manager *mgr = get_vidi_mgr(dev);
388 struct vidi_context *ctx = mgr->ctx;
391 ret = kstrtoint(buf, 0, &ctx->connected);
395 if (ctx->connected > 1)
398 /* use fake edid data for test. */
400 ctx->raw_edid = (struct edid *)fake_edid_info;
402 /* if raw_edid isn't same as fake data then it can't be tested. */
403 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
404 DRM_DEBUG_KMS("edid data is not fake data.\n");
408 DRM_DEBUG_KMS("requested connection.\n");
410 drm_helper_hpd_irq_event(ctx->drm_dev);
415 static DEVICE_ATTR(connection, 0644, vidi_show_connection,
416 vidi_store_connection);
418 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
419 struct drm_file *file_priv)
421 struct vidi_context *ctx = NULL;
422 struct drm_encoder *encoder;
423 struct exynos_drm_display *display;
424 struct drm_exynos_vidi_connection *vidi = data;
427 DRM_DEBUG_KMS("user data for vidi is null.\n");
431 if (vidi->connection > 1) {
432 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
436 list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
438 display = exynos_drm_get_display(encoder);
440 if (display->type == EXYNOS_DISPLAY_TYPE_VIDI) {
447 DRM_DEBUG_KMS("not found virtual device type encoder.\n");
451 if (ctx->connected == vidi->connection) {
452 DRM_DEBUG_KMS("same connection request.\n");
456 if (vidi->connection) {
457 struct edid *raw_edid = (struct edid *)(uint32_t)vidi->edid;
458 if (!drm_edid_is_valid(raw_edid)) {
459 DRM_DEBUG_KMS("edid data is invalid.\n");
462 ctx->raw_edid = drm_edid_duplicate(raw_edid);
463 if (!ctx->raw_edid) {
464 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
469 * with connection = 0, free raw_edid
470 * only if raw edid data isn't same as fake data.
472 if (ctx->raw_edid && ctx->raw_edid !=
473 (struct edid *)fake_edid_info) {
474 kfree(ctx->raw_edid);
475 ctx->raw_edid = NULL;
479 ctx->connected = vidi->connection;
480 drm_helper_hpd_irq_event(ctx->drm_dev);
485 static enum drm_connector_status vidi_detect(struct drm_connector *connector,
488 struct vidi_context *ctx = ctx_from_connector(connector);
491 * connection request would come from user side
492 * to do hotplug through specific ioctl.
494 return ctx->connected ? connector_status_connected :
495 connector_status_disconnected;
498 static void vidi_connector_destroy(struct drm_connector *connector)
502 static struct drm_connector_funcs vidi_connector_funcs = {
503 .dpms = drm_helper_connector_dpms,
504 .fill_modes = drm_helper_probe_single_connector_modes,
505 .detect = vidi_detect,
506 .destroy = vidi_connector_destroy,
509 static int vidi_get_modes(struct drm_connector *connector)
511 struct vidi_context *ctx = ctx_from_connector(connector);
516 * the edid data comes from user side and it would be set
517 * to ctx->raw_edid through specific ioctl.
519 if (!ctx->raw_edid) {
520 DRM_DEBUG_KMS("raw_edid is null.\n");
524 edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
525 edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
527 DRM_DEBUG_KMS("failed to allocate edid\n");
531 drm_mode_connector_update_edid_property(connector, edid);
533 return drm_add_edid_modes(connector, edid);
536 static int vidi_mode_valid(struct drm_connector *connector,
537 struct drm_display_mode *mode)
542 static struct drm_encoder *vidi_best_encoder(struct drm_connector *connector)
544 struct vidi_context *ctx = ctx_from_connector(connector);
549 static struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
550 .get_modes = vidi_get_modes,
551 .mode_valid = vidi_mode_valid,
552 .best_encoder = vidi_best_encoder,
555 static int vidi_create_connector(struct exynos_drm_display *display,
556 struct drm_encoder *encoder)
558 struct vidi_context *ctx = display->ctx;
559 struct drm_connector *connector = &ctx->connector;
562 ctx->encoder = encoder;
563 connector->polled = DRM_CONNECTOR_POLL_HPD;
565 ret = drm_connector_init(ctx->drm_dev, connector,
566 &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
568 DRM_ERROR("Failed to initialize connector with drm\n");
572 drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
573 drm_sysfs_connector_add(connector);
574 drm_mode_connector_attach_encoder(connector, encoder);
580 static struct exynos_drm_display_ops vidi_display_ops = {
581 .create_connector = vidi_create_connector,
584 static struct exynos_drm_display vidi_display = {
585 .type = EXYNOS_DISPLAY_TYPE_VIDI,
586 .ops = &vidi_display_ops,
589 static int vidi_probe(struct platform_device *pdev)
591 struct device *dev = &pdev->dev;
592 struct vidi_context *ctx;
595 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
599 ctx->default_win = 0;
601 INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
603 vidi_manager.ctx = ctx;
604 vidi_display.ctx = ctx;
606 mutex_init(&ctx->lock);
608 platform_set_drvdata(pdev, &vidi_manager);
610 ret = device_create_file(dev, &dev_attr_connection);
612 DRM_INFO("failed to create connection sysfs.\n");
614 exynos_drm_manager_register(&vidi_manager);
615 exynos_drm_display_register(&vidi_display);
620 static int vidi_remove(struct platform_device *pdev)
622 struct vidi_context *ctx = platform_get_drvdata(pdev);
624 exynos_drm_display_unregister(&vidi_display);
625 exynos_drm_manager_unregister(&vidi_manager);
627 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
628 kfree(ctx->raw_edid);
629 ctx->raw_edid = NULL;
635 struct platform_driver vidi_driver = {
637 .remove = vidi_remove,
639 .name = "exynos-drm-vidi",
640 .owner = THIS_MODULE,