1 // SPDX-License-Identifier: GPL-2.0-or-later
4 * Copyright (C) 2012 Samsung Electronics Co.Ltd
6 * Inki Dae <inki.dae@samsung.com>
9 #include <linux/component.h>
10 #include <linux/kernel.h>
11 #include <linux/platform_device.h>
12 #include <linux/timer.h>
14 #include <drm/drm_atomic_helper.h>
15 #include <drm/drm_edid.h>
16 #include <drm/drm_framebuffer.h>
17 #include <drm/drm_probe_helper.h>
18 #include <drm/drm_simple_kms_helper.h>
19 #include <drm/drm_vblank.h>
20 #include <drm/exynos_drm.h>
22 #include "exynos_drm_crtc.h"
23 #include "exynos_drm_drv.h"
24 #include "exynos_drm_fb.h"
25 #include "exynos_drm_plane.h"
26 #include "exynos_drm_vidi.h"
28 /* VIDI uses fixed refresh rate of 50Hz */
29 #define VIDI_REFRESH_TIME (1000 / 50)
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 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 connected;
48 struct timer_list timer;
52 static inline struct vidi_context *encoder_to_vidi(struct drm_encoder *e)
54 return container_of(e, struct vidi_context, encoder);
57 static const char fake_edid_info[] = {
58 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
59 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
60 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
61 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
62 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
63 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
64 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
65 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
66 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
67 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
68 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
69 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
70 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
71 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
72 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
73 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
74 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
75 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
76 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
77 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
78 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
79 0x00, 0x00, 0x00, 0x06
82 static const uint32_t formats[] = {
88 static const enum drm_plane_type vidi_win_types[WINDOWS_NR] = {
89 DRM_PLANE_TYPE_PRIMARY,
90 DRM_PLANE_TYPE_OVERLAY,
91 DRM_PLANE_TYPE_CURSOR,
94 static int vidi_enable_vblank(struct exynos_drm_crtc *crtc)
96 struct vidi_context *ctx = crtc->ctx;
101 mod_timer(&ctx->timer,
102 jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1);
107 static void vidi_disable_vblank(struct exynos_drm_crtc *crtc)
111 static void vidi_update_plane(struct exynos_drm_crtc *crtc,
112 struct exynos_drm_plane *plane)
114 struct drm_plane_state *state = plane->base.state;
115 struct vidi_context *ctx = crtc->ctx;
121 addr = exynos_drm_fb_dma_addr(state->fb, 0);
122 DRM_DEV_DEBUG_KMS(ctx->dev, "dma_addr = %pad\n", &addr);
125 static void vidi_atomic_enable(struct exynos_drm_crtc *crtc)
127 struct vidi_context *ctx = crtc->ctx;
129 mutex_lock(&ctx->lock);
131 ctx->suspended = false;
133 mutex_unlock(&ctx->lock);
135 drm_crtc_vblank_on(&crtc->base);
138 static void vidi_atomic_disable(struct exynos_drm_crtc *crtc)
140 struct vidi_context *ctx = crtc->ctx;
142 drm_crtc_vblank_off(&crtc->base);
144 mutex_lock(&ctx->lock);
146 ctx->suspended = true;
148 mutex_unlock(&ctx->lock);
151 static const struct exynos_drm_crtc_ops vidi_crtc_ops = {
152 .atomic_enable = vidi_atomic_enable,
153 .atomic_disable = vidi_atomic_disable,
154 .enable_vblank = vidi_enable_vblank,
155 .disable_vblank = vidi_disable_vblank,
156 .update_plane = vidi_update_plane,
157 .atomic_flush = exynos_crtc_handle_event,
160 static void vidi_fake_vblank_timer(struct timer_list *t)
162 struct vidi_context *ctx = from_timer(ctx, t, timer);
164 if (drm_crtc_handle_vblank(&ctx->crtc->base))
165 mod_timer(&ctx->timer,
166 jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1);
169 static ssize_t vidi_show_connection(struct device *dev,
170 struct device_attribute *attr, char *buf)
172 struct vidi_context *ctx = dev_get_drvdata(dev);
175 mutex_lock(&ctx->lock);
177 rc = sprintf(buf, "%d\n", ctx->connected);
179 mutex_unlock(&ctx->lock);
184 static ssize_t vidi_store_connection(struct device *dev,
185 struct device_attribute *attr,
186 const char *buf, size_t len)
188 struct vidi_context *ctx = dev_get_drvdata(dev);
191 ret = kstrtoint(buf, 0, &ctx->connected);
195 if (ctx->connected > 1)
198 /* use fake edid data for test. */
200 ctx->raw_edid = (struct edid *)fake_edid_info;
202 /* if raw_edid isn't same as fake data then it can't be tested. */
203 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
204 DRM_DEV_DEBUG_KMS(dev, "edid data is not fake data.\n");
208 DRM_DEV_DEBUG_KMS(dev, "requested connection.\n");
210 drm_helper_hpd_irq_event(ctx->drm_dev);
215 static DEVICE_ATTR(connection, 0644, vidi_show_connection,
216 vidi_store_connection);
218 static struct attribute *vidi_attrs[] = {
219 &dev_attr_connection.attr,
222 ATTRIBUTE_GROUPS(vidi);
224 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
225 struct drm_file *file_priv)
227 struct vidi_context *ctx = dev_get_drvdata(drm_dev->dev);
228 struct drm_exynos_vidi_connection *vidi = data;
231 DRM_DEV_DEBUG_KMS(ctx->dev,
232 "user data for vidi is null.\n");
236 if (vidi->connection > 1) {
237 DRM_DEV_DEBUG_KMS(ctx->dev,
238 "connection should be 0 or 1.\n");
242 if (ctx->connected == vidi->connection) {
243 DRM_DEV_DEBUG_KMS(ctx->dev,
244 "same connection request.\n");
248 if (vidi->connection) {
249 struct edid *raw_edid;
251 raw_edid = (struct edid *)(unsigned long)vidi->edid;
252 if (!drm_edid_is_valid(raw_edid)) {
253 DRM_DEV_DEBUG_KMS(ctx->dev,
254 "edid data is invalid.\n");
257 ctx->raw_edid = drm_edid_duplicate(raw_edid);
258 if (!ctx->raw_edid) {
259 DRM_DEV_DEBUG_KMS(ctx->dev,
260 "failed to allocate raw_edid.\n");
265 * with connection = 0, free raw_edid
266 * only if raw edid data isn't same as fake data.
268 if (ctx->raw_edid && ctx->raw_edid !=
269 (struct edid *)fake_edid_info) {
270 kfree(ctx->raw_edid);
271 ctx->raw_edid = NULL;
275 ctx->connected = vidi->connection;
276 drm_helper_hpd_irq_event(ctx->drm_dev);
281 static enum drm_connector_status vidi_detect(struct drm_connector *connector,
284 struct vidi_context *ctx = ctx_from_connector(connector);
287 * connection request would come from user side
288 * to do hotplug through specific ioctl.
290 return ctx->connected ? connector_status_connected :
291 connector_status_disconnected;
294 static void vidi_connector_destroy(struct drm_connector *connector)
298 static const struct drm_connector_funcs vidi_connector_funcs = {
299 .fill_modes = drm_helper_probe_single_connector_modes,
300 .detect = vidi_detect,
301 .destroy = vidi_connector_destroy,
302 .reset = drm_atomic_helper_connector_reset,
303 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
304 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
307 static int vidi_get_modes(struct drm_connector *connector)
309 struct vidi_context *ctx = ctx_from_connector(connector);
314 * the edid data comes from user side and it would be set
315 * to ctx->raw_edid through specific ioctl.
317 if (!ctx->raw_edid) {
318 DRM_DEV_DEBUG_KMS(ctx->dev, "raw_edid is null.\n");
322 edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
323 edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
325 DRM_DEV_DEBUG_KMS(ctx->dev, "failed to allocate edid\n");
329 drm_connector_update_edid_property(connector, edid);
331 return drm_add_edid_modes(connector, edid);
334 static const struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
335 .get_modes = vidi_get_modes,
338 static int vidi_create_connector(struct drm_encoder *encoder)
340 struct vidi_context *ctx = encoder_to_vidi(encoder);
341 struct drm_connector *connector = &ctx->connector;
344 connector->polled = DRM_CONNECTOR_POLL_HPD;
346 ret = drm_connector_init(ctx->drm_dev, connector,
347 &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
349 DRM_DEV_ERROR(ctx->dev,
350 "Failed to initialize connector with drm\n");
354 drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
355 drm_connector_attach_encoder(connector, encoder);
360 static void exynos_vidi_mode_set(struct drm_encoder *encoder,
361 struct drm_display_mode *mode,
362 struct drm_display_mode *adjusted_mode)
366 static void exynos_vidi_enable(struct drm_encoder *encoder)
370 static void exynos_vidi_disable(struct drm_encoder *encoder)
374 static const struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = {
375 .mode_set = exynos_vidi_mode_set,
376 .enable = exynos_vidi_enable,
377 .disable = exynos_vidi_disable,
380 static int vidi_bind(struct device *dev, struct device *master, void *data)
382 struct vidi_context *ctx = dev_get_drvdata(dev);
383 struct drm_device *drm_dev = data;
384 struct drm_encoder *encoder = &ctx->encoder;
385 struct exynos_drm_plane *exynos_plane;
386 struct exynos_drm_plane_config plane_config = { 0 };
390 ctx->drm_dev = drm_dev;
392 plane_config.pixel_formats = formats;
393 plane_config.num_pixel_formats = ARRAY_SIZE(formats);
395 for (i = 0; i < WINDOWS_NR; i++) {
396 plane_config.zpos = i;
397 plane_config.type = vidi_win_types[i];
399 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
405 exynos_plane = &ctx->planes[DEFAULT_WIN];
406 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
407 EXYNOS_DISPLAY_TYPE_VIDI, &vidi_crtc_ops, ctx);
408 if (IS_ERR(ctx->crtc)) {
409 DRM_DEV_ERROR(dev, "failed to create crtc.\n");
410 return PTR_ERR(ctx->crtc);
413 drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_TMDS);
415 drm_encoder_helper_add(encoder, &exynos_vidi_encoder_helper_funcs);
417 ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_VIDI);
421 ret = vidi_create_connector(encoder);
423 DRM_DEV_ERROR(dev, "failed to create connector ret = %d\n",
425 drm_encoder_cleanup(encoder);
433 static void vidi_unbind(struct device *dev, struct device *master, void *data)
435 struct vidi_context *ctx = dev_get_drvdata(dev);
437 del_timer_sync(&ctx->timer);
440 static const struct component_ops vidi_component_ops = {
442 .unbind = vidi_unbind,
445 static int vidi_probe(struct platform_device *pdev)
447 struct vidi_context *ctx;
448 struct device *dev = &pdev->dev;
450 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
456 timer_setup(&ctx->timer, vidi_fake_vblank_timer, 0);
458 mutex_init(&ctx->lock);
460 platform_set_drvdata(pdev, ctx);
462 return component_add(dev, &vidi_component_ops);
465 static int vidi_remove(struct platform_device *pdev)
467 struct vidi_context *ctx = platform_get_drvdata(pdev);
469 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
470 kfree(ctx->raw_edid);
471 ctx->raw_edid = NULL;
474 component_del(&pdev->dev, &vidi_component_ops);
479 struct platform_driver vidi_driver = {
481 .remove = vidi_remove,
483 .name = "exynos-drm-vidi",
484 .owner = THIS_MODULE,
485 .dev_groups = vidi_groups,