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>
23 #include <drm/drm_atomic_helper.h>
25 #include "exynos_drm_drv.h"
26 #include "exynos_drm_crtc.h"
27 #include "exynos_drm_plane.h"
28 #include "exynos_drm_encoder.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 exynos_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 int default_win;
47 unsigned long irq_flags;
48 unsigned int connected;
52 struct work_struct work;
57 static inline struct vidi_context *encoder_to_vidi(struct exynos_drm_encoder *e)
59 return container_of(e, struct vidi_context, encoder);
62 static const char fake_edid_info[] = {
63 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
64 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
65 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
66 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
67 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
68 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
69 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
70 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
71 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
72 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
73 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
74 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
75 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
76 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
77 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
78 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
79 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
80 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 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, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
84 0x00, 0x00, 0x00, 0x06
87 static int vidi_enable_vblank(struct exynos_drm_crtc *crtc)
89 struct vidi_context *ctx = crtc->ctx;
94 if (!test_and_set_bit(0, &ctx->irq_flags))
95 ctx->vblank_on = true;
97 ctx->direct_vblank = true;
100 * in case of page flip request, vidi_finish_pageflip function
101 * will not be called because direct_vblank is true and then
102 * that function will be called by crtc_ops->update_plane callback
104 schedule_work(&ctx->work);
109 static void vidi_disable_vblank(struct exynos_drm_crtc *crtc)
111 struct vidi_context *ctx = crtc->ctx;
116 if (test_and_clear_bit(0, &ctx->irq_flags))
117 ctx->vblank_on = false;
120 static void vidi_update_plane(struct exynos_drm_crtc *crtc,
121 struct exynos_drm_plane *plane)
123 struct vidi_context *ctx = crtc->ctx;
128 DRM_DEBUG_KMS("dma_addr = %pad\n", plane->dma_addr);
131 schedule_work(&ctx->work);
134 static void vidi_enable(struct exynos_drm_crtc *crtc)
136 struct vidi_context *ctx = crtc->ctx;
138 mutex_lock(&ctx->lock);
140 ctx->suspended = false;
142 /* if vblank was enabled status, enable it again. */
143 if (test_and_clear_bit(0, &ctx->irq_flags))
144 vidi_enable_vblank(ctx->crtc);
146 mutex_unlock(&ctx->lock);
149 static void vidi_disable(struct exynos_drm_crtc *crtc)
151 struct vidi_context *ctx = crtc->ctx;
153 mutex_lock(&ctx->lock);
155 ctx->suspended = true;
157 mutex_unlock(&ctx->lock);
160 static int vidi_ctx_initialize(struct vidi_context *ctx,
161 struct drm_device *drm_dev)
163 struct exynos_drm_private *priv = drm_dev->dev_private;
165 ctx->drm_dev = drm_dev;
166 ctx->pipe = priv->pipe++;
171 static const struct exynos_drm_crtc_ops vidi_crtc_ops = {
172 .enable = vidi_enable,
173 .disable = vidi_disable,
174 .enable_vblank = vidi_enable_vblank,
175 .disable_vblank = vidi_disable_vblank,
176 .update_plane = vidi_update_plane,
179 static void vidi_fake_vblank_handler(struct work_struct *work)
181 struct vidi_context *ctx = container_of(work, struct vidi_context,
187 /* refresh rate is about 50Hz. */
188 usleep_range(16000, 20000);
190 mutex_lock(&ctx->lock);
192 if (ctx->direct_vblank) {
193 drm_crtc_handle_vblank(&ctx->crtc->base);
194 ctx->direct_vblank = false;
195 mutex_unlock(&ctx->lock);
199 mutex_unlock(&ctx->lock);
201 exynos_drm_crtc_finish_pageflip(ctx->crtc);
204 static int vidi_show_connection(struct device *dev,
205 struct device_attribute *attr, char *buf)
207 struct vidi_context *ctx = dev_get_drvdata(dev);
210 mutex_lock(&ctx->lock);
212 rc = sprintf(buf, "%d\n", ctx->connected);
214 mutex_unlock(&ctx->lock);
219 static int vidi_store_connection(struct device *dev,
220 struct device_attribute *attr,
221 const char *buf, size_t len)
223 struct vidi_context *ctx = dev_get_drvdata(dev);
226 ret = kstrtoint(buf, 0, &ctx->connected);
230 if (ctx->connected > 1)
233 /* use fake edid data for test. */
235 ctx->raw_edid = (struct edid *)fake_edid_info;
237 /* if raw_edid isn't same as fake data then it can't be tested. */
238 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
239 DRM_DEBUG_KMS("edid data is not fake data.\n");
243 DRM_DEBUG_KMS("requested connection.\n");
245 drm_helper_hpd_irq_event(ctx->drm_dev);
250 static DEVICE_ATTR(connection, 0644, vidi_show_connection,
251 vidi_store_connection);
253 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
254 struct drm_file *file_priv)
256 struct vidi_context *ctx = dev_get_drvdata(drm_dev->dev);
257 struct drm_exynos_vidi_connection *vidi = data;
260 DRM_DEBUG_KMS("user data for vidi is null.\n");
264 if (vidi->connection > 1) {
265 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
269 if (ctx->connected == vidi->connection) {
270 DRM_DEBUG_KMS("same connection request.\n");
274 if (vidi->connection) {
275 struct edid *raw_edid = (struct edid *)(uint32_t)vidi->edid;
276 if (!drm_edid_is_valid(raw_edid)) {
277 DRM_DEBUG_KMS("edid data is invalid.\n");
280 ctx->raw_edid = drm_edid_duplicate(raw_edid);
281 if (!ctx->raw_edid) {
282 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
287 * with connection = 0, free raw_edid
288 * only if raw edid data isn't same as fake data.
290 if (ctx->raw_edid && ctx->raw_edid !=
291 (struct edid *)fake_edid_info) {
292 kfree(ctx->raw_edid);
293 ctx->raw_edid = NULL;
297 ctx->connected = vidi->connection;
298 drm_helper_hpd_irq_event(ctx->drm_dev);
303 static enum drm_connector_status vidi_detect(struct drm_connector *connector,
306 struct vidi_context *ctx = ctx_from_connector(connector);
309 * connection request would come from user side
310 * to do hotplug through specific ioctl.
312 return ctx->connected ? connector_status_connected :
313 connector_status_disconnected;
316 static void vidi_connector_destroy(struct drm_connector *connector)
320 static struct drm_connector_funcs vidi_connector_funcs = {
321 .dpms = drm_atomic_helper_connector_dpms,
322 .fill_modes = drm_helper_probe_single_connector_modes,
323 .detect = vidi_detect,
324 .destroy = vidi_connector_destroy,
325 .reset = drm_atomic_helper_connector_reset,
326 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
327 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
330 static int vidi_get_modes(struct drm_connector *connector)
332 struct vidi_context *ctx = ctx_from_connector(connector);
337 * the edid data comes from user side and it would be set
338 * to ctx->raw_edid through specific ioctl.
340 if (!ctx->raw_edid) {
341 DRM_DEBUG_KMS("raw_edid is null.\n");
345 edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
346 edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
348 DRM_DEBUG_KMS("failed to allocate edid\n");
352 drm_mode_connector_update_edid_property(connector, edid);
354 return drm_add_edid_modes(connector, edid);
357 static struct drm_encoder *vidi_best_encoder(struct drm_connector *connector)
359 struct vidi_context *ctx = ctx_from_connector(connector);
361 return &ctx->encoder.base;
364 static struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
365 .get_modes = vidi_get_modes,
366 .best_encoder = vidi_best_encoder,
369 static int vidi_create_connector(struct exynos_drm_encoder *exynos_encoder)
371 struct vidi_context *ctx = encoder_to_vidi(exynos_encoder);
372 struct drm_encoder *encoder = &exynos_encoder->base;
373 struct drm_connector *connector = &ctx->connector;
376 connector->polled = DRM_CONNECTOR_POLL_HPD;
378 ret = drm_connector_init(ctx->drm_dev, connector,
379 &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
381 DRM_ERROR("Failed to initialize connector with drm\n");
385 drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
386 drm_connector_register(connector);
387 drm_mode_connector_attach_encoder(connector, encoder);
393 static struct exynos_drm_encoder_ops vidi_encoder_ops = {
394 .create_connector = vidi_create_connector,
397 static int vidi_bind(struct device *dev, struct device *master, void *data)
399 struct vidi_context *ctx = dev_get_drvdata(dev);
400 struct drm_device *drm_dev = data;
401 struct exynos_drm_plane *exynos_plane;
402 enum drm_plane_type type;
406 vidi_ctx_initialize(ctx, drm_dev);
408 for (zpos = 0; zpos < WINDOWS_NR; zpos++) {
409 type = (zpos == ctx->default_win) ? DRM_PLANE_TYPE_PRIMARY :
410 DRM_PLANE_TYPE_OVERLAY;
411 ret = exynos_plane_init(drm_dev, &ctx->planes[zpos],
412 1 << ctx->pipe, type, zpos);
417 exynos_plane = &ctx->planes[ctx->default_win];
418 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
419 ctx->pipe, EXYNOS_DISPLAY_TYPE_VIDI,
420 &vidi_crtc_ops, ctx);
421 if (IS_ERR(ctx->crtc)) {
422 DRM_ERROR("failed to create crtc.\n");
423 return PTR_ERR(ctx->crtc);
426 ret = exynos_drm_create_enc_conn(drm_dev, &ctx->encoder,
427 EXYNOS_DISPLAY_TYPE_VIDI);
429 ctx->crtc->base.funcs->destroy(&ctx->crtc->base);
437 static void vidi_unbind(struct device *dev, struct device *master, void *data)
441 static const struct component_ops vidi_component_ops = {
443 .unbind = vidi_unbind,
446 static int vidi_probe(struct platform_device *pdev)
448 struct vidi_context *ctx;
451 ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
455 ctx->encoder.ops = &vidi_encoder_ops;
456 ctx->default_win = 0;
459 INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
461 mutex_init(&ctx->lock);
463 platform_set_drvdata(pdev, ctx);
465 ret = device_create_file(&pdev->dev, &dev_attr_connection);
467 DRM_ERROR("failed to create connection sysfs.\n");
471 ret = component_add(&pdev->dev, &vidi_component_ops);
473 goto err_remove_file;
478 device_remove_file(&pdev->dev, &dev_attr_connection);
483 static int vidi_remove(struct platform_device *pdev)
485 struct vidi_context *ctx = platform_get_drvdata(pdev);
487 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
488 kfree(ctx->raw_edid);
489 ctx->raw_edid = NULL;
494 component_del(&pdev->dev, &vidi_component_ops);
499 struct platform_driver vidi_driver = {
501 .remove = vidi_remove,
503 .name = "exynos-drm-vidi",
504 .owner = THIS_MODULE,