3 * Copyright (C) 2012 Samsung Electronics Co.Ltd
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>
23 #include <drm/drm_atomic_helper.h>
25 #include "exynos_drm_drv.h"
26 #include "exynos_drm_crtc.h"
27 #include "exynos_drm_fb.h"
28 #include "exynos_drm_plane.h"
29 #include "exynos_drm_vidi.h"
31 /* vidi has totally three virtual windows. */
34 #define ctx_from_connector(c) container_of(c, struct vidi_context, \
38 struct drm_encoder encoder;
39 struct platform_device *pdev;
40 struct drm_device *drm_dev;
41 struct exynos_drm_crtc *crtc;
42 struct drm_connector connector;
43 struct exynos_drm_plane planes[WINDOWS_NR];
44 struct edid *raw_edid;
46 unsigned long irq_flags;
47 unsigned int connected;
51 struct work_struct work;
56 static inline struct vidi_context *encoder_to_vidi(struct drm_encoder *e)
58 return container_of(e, struct vidi_context, encoder);
61 static const char fake_edid_info[] = {
62 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
63 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
64 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
65 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
66 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
67 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
68 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
69 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
70 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
71 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
72 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
73 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
74 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
75 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
76 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
77 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
78 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
79 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
80 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
81 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
82 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
83 0x00, 0x00, 0x00, 0x06
86 static const uint32_t formats[] = {
92 static const enum drm_plane_type vidi_win_types[WINDOWS_NR] = {
93 DRM_PLANE_TYPE_PRIMARY,
94 DRM_PLANE_TYPE_OVERLAY,
95 DRM_PLANE_TYPE_CURSOR,
98 static int vidi_enable_vblank(struct exynos_drm_crtc *crtc)
100 struct vidi_context *ctx = crtc->ctx;
105 if (!test_and_set_bit(0, &ctx->irq_flags))
106 ctx->vblank_on = true;
108 ctx->direct_vblank = true;
111 * in case of page flip request, vidi_finish_pageflip function
112 * will not be called because direct_vblank is true and then
113 * that function will be called by crtc_ops->update_plane callback
115 schedule_work(&ctx->work);
120 static void vidi_disable_vblank(struct exynos_drm_crtc *crtc)
122 struct vidi_context *ctx = crtc->ctx;
127 if (test_and_clear_bit(0, &ctx->irq_flags))
128 ctx->vblank_on = false;
131 static void vidi_update_plane(struct exynos_drm_crtc *crtc,
132 struct exynos_drm_plane *plane)
134 struct drm_plane_state *state = plane->base.state;
135 struct vidi_context *ctx = crtc->ctx;
141 addr = exynos_drm_fb_dma_addr(state->fb, 0);
142 DRM_DEBUG_KMS("dma_addr = %pad\n", &addr);
145 schedule_work(&ctx->work);
148 static void vidi_enable(struct exynos_drm_crtc *crtc)
150 struct vidi_context *ctx = crtc->ctx;
152 mutex_lock(&ctx->lock);
154 ctx->suspended = false;
156 /* if vblank was enabled status, enable it again. */
157 if (test_and_clear_bit(0, &ctx->irq_flags))
158 vidi_enable_vblank(ctx->crtc);
160 mutex_unlock(&ctx->lock);
163 static void vidi_disable(struct exynos_drm_crtc *crtc)
165 struct vidi_context *ctx = crtc->ctx;
167 mutex_lock(&ctx->lock);
169 ctx->suspended = true;
171 mutex_unlock(&ctx->lock);
174 static int vidi_ctx_initialize(struct vidi_context *ctx,
175 struct drm_device *drm_dev)
177 struct exynos_drm_private *priv = drm_dev->dev_private;
179 ctx->drm_dev = drm_dev;
180 ctx->pipe = priv->pipe++;
185 static const struct exynos_drm_crtc_ops vidi_crtc_ops = {
186 .enable = vidi_enable,
187 .disable = vidi_disable,
188 .enable_vblank = vidi_enable_vblank,
189 .disable_vblank = vidi_disable_vblank,
190 .update_plane = vidi_update_plane,
193 static void vidi_fake_vblank_handler(struct work_struct *work)
195 struct vidi_context *ctx = container_of(work, struct vidi_context,
202 /* refresh rate is about 50Hz. */
203 usleep_range(16000, 20000);
205 mutex_lock(&ctx->lock);
207 if (ctx->direct_vblank) {
208 drm_crtc_handle_vblank(&ctx->crtc->base);
209 ctx->direct_vblank = false;
210 mutex_unlock(&ctx->lock);
214 mutex_unlock(&ctx->lock);
216 for (win = 0 ; win < WINDOWS_NR ; win++) {
217 struct exynos_drm_plane *plane = &ctx->planes[win];
219 if (!plane->pending_fb)
222 exynos_drm_crtc_finish_update(ctx->crtc, plane);
226 static ssize_t vidi_show_connection(struct device *dev,
227 struct device_attribute *attr, char *buf)
229 struct vidi_context *ctx = dev_get_drvdata(dev);
232 mutex_lock(&ctx->lock);
234 rc = sprintf(buf, "%d\n", ctx->connected);
236 mutex_unlock(&ctx->lock);
241 static ssize_t vidi_store_connection(struct device *dev,
242 struct device_attribute *attr,
243 const char *buf, size_t len)
245 struct vidi_context *ctx = dev_get_drvdata(dev);
248 ret = kstrtoint(buf, 0, &ctx->connected);
252 if (ctx->connected > 1)
255 /* use fake edid data for test. */
257 ctx->raw_edid = (struct edid *)fake_edid_info;
259 /* if raw_edid isn't same as fake data then it can't be tested. */
260 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
261 DRM_DEBUG_KMS("edid data is not fake data.\n");
265 DRM_DEBUG_KMS("requested connection.\n");
267 drm_helper_hpd_irq_event(ctx->drm_dev);
272 static DEVICE_ATTR(connection, 0644, vidi_show_connection,
273 vidi_store_connection);
275 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
276 struct drm_file *file_priv)
278 struct vidi_context *ctx = dev_get_drvdata(drm_dev->dev);
279 struct drm_exynos_vidi_connection *vidi = data;
282 DRM_DEBUG_KMS("user data for vidi is null.\n");
286 if (vidi->connection > 1) {
287 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
291 if (ctx->connected == vidi->connection) {
292 DRM_DEBUG_KMS("same connection request.\n");
296 if (vidi->connection) {
297 struct edid *raw_edid;
299 raw_edid = (struct edid *)(unsigned long)vidi->edid;
300 if (!drm_edid_is_valid(raw_edid)) {
301 DRM_DEBUG_KMS("edid data is invalid.\n");
304 ctx->raw_edid = drm_edid_duplicate(raw_edid);
305 if (!ctx->raw_edid) {
306 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
311 * with connection = 0, free raw_edid
312 * only if raw edid data isn't same as fake data.
314 if (ctx->raw_edid && ctx->raw_edid !=
315 (struct edid *)fake_edid_info) {
316 kfree(ctx->raw_edid);
317 ctx->raw_edid = NULL;
321 ctx->connected = vidi->connection;
322 drm_helper_hpd_irq_event(ctx->drm_dev);
327 static enum drm_connector_status vidi_detect(struct drm_connector *connector,
330 struct vidi_context *ctx = ctx_from_connector(connector);
333 * connection request would come from user side
334 * to do hotplug through specific ioctl.
336 return ctx->connected ? connector_status_connected :
337 connector_status_disconnected;
340 static void vidi_connector_destroy(struct drm_connector *connector)
344 static const struct drm_connector_funcs vidi_connector_funcs = {
345 .dpms = drm_atomic_helper_connector_dpms,
346 .fill_modes = drm_helper_probe_single_connector_modes,
347 .detect = vidi_detect,
348 .destroy = vidi_connector_destroy,
349 .reset = drm_atomic_helper_connector_reset,
350 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
351 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
354 static int vidi_get_modes(struct drm_connector *connector)
356 struct vidi_context *ctx = ctx_from_connector(connector);
361 * the edid data comes from user side and it would be set
362 * to ctx->raw_edid through specific ioctl.
364 if (!ctx->raw_edid) {
365 DRM_DEBUG_KMS("raw_edid is null.\n");
369 edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
370 edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
372 DRM_DEBUG_KMS("failed to allocate edid\n");
376 drm_mode_connector_update_edid_property(connector, edid);
378 return drm_add_edid_modes(connector, edid);
381 static struct drm_encoder *vidi_best_encoder(struct drm_connector *connector)
383 struct vidi_context *ctx = ctx_from_connector(connector);
385 return &ctx->encoder;
388 static const struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
389 .get_modes = vidi_get_modes,
390 .best_encoder = vidi_best_encoder,
393 static int vidi_create_connector(struct drm_encoder *encoder)
395 struct vidi_context *ctx = encoder_to_vidi(encoder);
396 struct drm_connector *connector = &ctx->connector;
399 connector->polled = DRM_CONNECTOR_POLL_HPD;
401 ret = drm_connector_init(ctx->drm_dev, connector,
402 &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
404 DRM_ERROR("Failed to initialize connector with drm\n");
408 drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
409 drm_connector_register(connector);
410 drm_mode_connector_attach_encoder(connector, encoder);
415 static bool exynos_vidi_mode_fixup(struct drm_encoder *encoder,
416 const struct drm_display_mode *mode,
417 struct drm_display_mode *adjusted_mode)
422 static void exynos_vidi_mode_set(struct drm_encoder *encoder,
423 struct drm_display_mode *mode,
424 struct drm_display_mode *adjusted_mode)
428 static void exynos_vidi_enable(struct drm_encoder *encoder)
432 static void exynos_vidi_disable(struct drm_encoder *encoder)
436 static const struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = {
437 .mode_fixup = exynos_vidi_mode_fixup,
438 .mode_set = exynos_vidi_mode_set,
439 .enable = exynos_vidi_enable,
440 .disable = exynos_vidi_disable,
443 static const struct drm_encoder_funcs exynos_vidi_encoder_funcs = {
444 .destroy = drm_encoder_cleanup,
447 static int vidi_bind(struct device *dev, struct device *master, void *data)
449 struct vidi_context *ctx = dev_get_drvdata(dev);
450 struct drm_device *drm_dev = data;
451 struct drm_encoder *encoder = &ctx->encoder;
452 struct exynos_drm_plane *exynos_plane;
453 struct exynos_drm_plane_config plane_config = { 0 };
457 vidi_ctx_initialize(ctx, drm_dev);
459 plane_config.pixel_formats = formats;
460 plane_config.num_pixel_formats = ARRAY_SIZE(formats);
462 for (i = 0; i < WINDOWS_NR; i++) {
463 plane_config.zpos = i;
464 plane_config.type = vidi_win_types[i];
466 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
467 1 << ctx->pipe, &plane_config);
472 exynos_plane = &ctx->planes[DEFAULT_WIN];
473 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
474 ctx->pipe, EXYNOS_DISPLAY_TYPE_VIDI,
475 &vidi_crtc_ops, ctx);
476 if (IS_ERR(ctx->crtc)) {
477 DRM_ERROR("failed to create crtc.\n");
478 return PTR_ERR(ctx->crtc);
481 pipe = exynos_drm_crtc_get_pipe_from_type(drm_dev,
482 EXYNOS_DISPLAY_TYPE_VIDI);
486 encoder->possible_crtcs = 1 << pipe;
488 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
490 drm_encoder_init(drm_dev, encoder, &exynos_vidi_encoder_funcs,
491 DRM_MODE_ENCODER_TMDS, NULL);
493 drm_encoder_helper_add(encoder, &exynos_vidi_encoder_helper_funcs);
495 ret = vidi_create_connector(encoder);
497 DRM_ERROR("failed to create connector ret = %d\n", ret);
498 drm_encoder_cleanup(encoder);
506 static void vidi_unbind(struct device *dev, struct device *master, void *data)
510 static const struct component_ops vidi_component_ops = {
512 .unbind = vidi_unbind,
515 static int vidi_probe(struct platform_device *pdev)
517 struct vidi_context *ctx;
520 ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
526 INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
528 mutex_init(&ctx->lock);
530 platform_set_drvdata(pdev, ctx);
532 ret = device_create_file(&pdev->dev, &dev_attr_connection);
534 DRM_ERROR("failed to create connection sysfs.\n");
538 ret = component_add(&pdev->dev, &vidi_component_ops);
540 goto err_remove_file;
545 device_remove_file(&pdev->dev, &dev_attr_connection);
550 static int vidi_remove(struct platform_device *pdev)
552 struct vidi_context *ctx = platform_get_drvdata(pdev);
554 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
555 kfree(ctx->raw_edid);
556 ctx->raw_edid = NULL;
561 component_del(&pdev->dev, &vidi_component_ops);
566 struct platform_driver vidi_driver = {
568 .remove = vidi_remove,
570 .name = "exynos-drm-vidi",
571 .owner = THIS_MODULE,