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1// SPDX-License-Identifier: GPL-2.0-or-later2/* exynos_drm_vidi.c3 *4 * Copyright (C) 2012 Samsung Electronics Co.Ltd5 * Authors:6 * Inki Dae <inki.dae@samsung.com>7 */8 9#include <linux/component.h>10#include <linux/kernel.h>11#include <linux/platform_device.h>12#include <linux/timer.h>13 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>21 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"27 28/* VIDI uses fixed refresh rate of 50Hz */29#define VIDI_REFRESH_TIME (1000 / 50)30 31/* vidi has totally three virtual windows. */32#define WINDOWS_NR 333 34#define ctx_from_connector(c) container_of(c, struct vidi_context, \35 connector)36 37struct vidi_context {38 struct drm_encoder encoder;39 struct drm_device *drm_dev;40 struct device *dev;41 struct exynos_drm_crtc *crtc;42 struct drm_connector connector;43 struct exynos_drm_plane planes[WINDOWS_NR];44 const struct drm_edid *raw_edid;45 unsigned int clkdiv;46 unsigned int connected;47 bool suspended;48 struct timer_list timer;49 struct mutex lock;50};51 52static inline struct vidi_context *encoder_to_vidi(struct drm_encoder *e)53{54 return container_of(e, struct vidi_context, encoder);55}56 57static 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, 0x0680};81 82static const uint32_t formats[] = {83 DRM_FORMAT_XRGB8888,84 DRM_FORMAT_ARGB8888,85 DRM_FORMAT_NV12,86};87 88static 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,92};93 94static int vidi_enable_vblank(struct exynos_drm_crtc *crtc)95{96 struct vidi_context *ctx = crtc->ctx;97 98 if (ctx->suspended)99 return -EPERM;100 101 mod_timer(&ctx->timer,102 jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1);103 104 return 0;105}106 107static void vidi_disable_vblank(struct exynos_drm_crtc *crtc)108{109}110 111static void vidi_update_plane(struct exynos_drm_crtc *crtc,112 struct exynos_drm_plane *plane)113{114 struct drm_plane_state *state = plane->base.state;115 struct vidi_context *ctx = crtc->ctx;116 dma_addr_t addr;117 118 if (ctx->suspended)119 return;120 121 addr = exynos_drm_fb_dma_addr(state->fb, 0);122 DRM_DEV_DEBUG_KMS(ctx->dev, "dma_addr = %pad\n", &addr);123}124 125static void vidi_atomic_enable(struct exynos_drm_crtc *crtc)126{127 struct vidi_context *ctx = crtc->ctx;128 129 mutex_lock(&ctx->lock);130 131 ctx->suspended = false;132 133 mutex_unlock(&ctx->lock);134 135 drm_crtc_vblank_on(&crtc->base);136}137 138static void vidi_atomic_disable(struct exynos_drm_crtc *crtc)139{140 struct vidi_context *ctx = crtc->ctx;141 142 drm_crtc_vblank_off(&crtc->base);143 144 mutex_lock(&ctx->lock);145 146 ctx->suspended = true;147 148 mutex_unlock(&ctx->lock);149}150 151static 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,158};159 160static void vidi_fake_vblank_timer(struct timer_list *t)161{162 struct vidi_context *ctx = from_timer(ctx, t, timer);163 164 if (drm_crtc_handle_vblank(&ctx->crtc->base))165 mod_timer(&ctx->timer,166 jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1);167}168 169static ssize_t vidi_show_connection(struct device *dev,170 struct device_attribute *attr, char *buf)171{172 struct vidi_context *ctx = dev_get_drvdata(dev);173 int rc;174 175 mutex_lock(&ctx->lock);176 177 rc = sprintf(buf, "%d\n", ctx->connected);178 179 mutex_unlock(&ctx->lock);180 181 return rc;182}183 184static ssize_t vidi_store_connection(struct device *dev,185 struct device_attribute *attr,186 const char *buf, size_t len)187{188 struct vidi_context *ctx = dev_get_drvdata(dev);189 int ret;190 191 ret = kstrtoint(buf, 0, &ctx->connected);192 if (ret)193 return ret;194 195 if (ctx->connected > 1)196 return -EINVAL;197 198 /*199 * Use fake edid data for test. If raw_edid is set then it can't be200 * tested.201 */202 if (ctx->raw_edid) {203 DRM_DEV_DEBUG_KMS(dev, "edid data is not fake data.\n");204 return -EINVAL;205 }206 207 DRM_DEV_DEBUG_KMS(dev, "requested connection.\n");208 209 drm_helper_hpd_irq_event(ctx->drm_dev);210 211 return len;212}213 214static DEVICE_ATTR(connection, 0644, vidi_show_connection,215 vidi_store_connection);216 217static struct attribute *vidi_attrs[] = {218 &dev_attr_connection.attr,219 NULL,220};221ATTRIBUTE_GROUPS(vidi);222 223int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,224 struct drm_file *file_priv)225{226 struct vidi_context *ctx = dev_get_drvdata(drm_dev->dev);227 struct drm_exynos_vidi_connection *vidi = data;228 229 if (!vidi) {230 DRM_DEV_DEBUG_KMS(ctx->dev,231 "user data for vidi is null.\n");232 return -EINVAL;233 }234 235 if (vidi->connection > 1) {236 DRM_DEV_DEBUG_KMS(ctx->dev,237 "connection should be 0 or 1.\n");238 return -EINVAL;239 }240 241 if (ctx->connected == vidi->connection) {242 DRM_DEV_DEBUG_KMS(ctx->dev,243 "same connection request.\n");244 return -EINVAL;245 }246 247 if (vidi->connection) {248 const struct drm_edid *drm_edid;249 const struct edid *raw_edid;250 size_t size;251 252 raw_edid = (const struct edid *)(unsigned long)vidi->edid;253 size = (raw_edid->extensions + 1) * EDID_LENGTH;254 255 drm_edid = drm_edid_alloc(raw_edid, size);256 if (!drm_edid)257 return -ENOMEM;258 259 if (!drm_edid_valid(drm_edid)) {260 drm_edid_free(drm_edid);261 DRM_DEV_DEBUG_KMS(ctx->dev,262 "edid data is invalid.\n");263 return -EINVAL;264 }265 ctx->raw_edid = drm_edid;266 } else {267 /* with connection = 0, free raw_edid */268 drm_edid_free(ctx->raw_edid);269 ctx->raw_edid = NULL;270 }271 272 ctx->connected = vidi->connection;273 drm_helper_hpd_irq_event(ctx->drm_dev);274 275 return 0;276}277 278static enum drm_connector_status vidi_detect(struct drm_connector *connector,279 bool force)280{281 struct vidi_context *ctx = ctx_from_connector(connector);282 283 /*284 * connection request would come from user side285 * to do hotplug through specific ioctl.286 */287 return ctx->connected ? connector_status_connected :288 connector_status_disconnected;289}290 291static void vidi_connector_destroy(struct drm_connector *connector)292{293}294 295static const struct drm_connector_funcs vidi_connector_funcs = {296 .fill_modes = drm_helper_probe_single_connector_modes,297 .detect = vidi_detect,298 .destroy = vidi_connector_destroy,299 .reset = drm_atomic_helper_connector_reset,300 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,301 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,302};303 304static int vidi_get_modes(struct drm_connector *connector)305{306 struct vidi_context *ctx = ctx_from_connector(connector);307 const struct drm_edid *drm_edid;308 int count;309 310 if (ctx->raw_edid)311 drm_edid = drm_edid_dup(ctx->raw_edid);312 else313 drm_edid = drm_edid_alloc(fake_edid_info, sizeof(fake_edid_info));314 315 if (!drm_edid)316 return 0;317 318 drm_edid_connector_update(connector, drm_edid);319 320 count = drm_edid_connector_add_modes(connector);321 322 drm_edid_free(drm_edid);323 324 return count;325}326 327static const struct drm_connector_helper_funcs vidi_connector_helper_funcs = {328 .get_modes = vidi_get_modes,329};330 331static int vidi_create_connector(struct drm_encoder *encoder)332{333 struct vidi_context *ctx = encoder_to_vidi(encoder);334 struct drm_connector *connector = &ctx->connector;335 int ret;336 337 connector->polled = DRM_CONNECTOR_POLL_HPD;338 339 ret = drm_connector_init(ctx->drm_dev, connector,340 &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);341 if (ret) {342 DRM_DEV_ERROR(ctx->dev,343 "Failed to initialize connector with drm\n");344 return ret;345 }346 347 drm_connector_helper_add(connector, &vidi_connector_helper_funcs);348 drm_connector_attach_encoder(connector, encoder);349 350 return 0;351}352 353static void exynos_vidi_mode_set(struct drm_encoder *encoder,354 struct drm_display_mode *mode,355 struct drm_display_mode *adjusted_mode)356{357}358 359static void exynos_vidi_enable(struct drm_encoder *encoder)360{361}362 363static void exynos_vidi_disable(struct drm_encoder *encoder)364{365}366 367static const struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = {368 .mode_set = exynos_vidi_mode_set,369 .enable = exynos_vidi_enable,370 .disable = exynos_vidi_disable,371};372 373static int vidi_bind(struct device *dev, struct device *master, void *data)374{375 struct vidi_context *ctx = dev_get_drvdata(dev);376 struct drm_device *drm_dev = data;377 struct drm_encoder *encoder = &ctx->encoder;378 struct exynos_drm_plane *exynos_plane;379 struct exynos_drm_plane_config plane_config = { 0 };380 unsigned int i;381 int ret;382 383 ctx->drm_dev = drm_dev;384 385 plane_config.pixel_formats = formats;386 plane_config.num_pixel_formats = ARRAY_SIZE(formats);387 388 for (i = 0; i < WINDOWS_NR; i++) {389 plane_config.zpos = i;390 plane_config.type = vidi_win_types[i];391 392 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,393 &plane_config);394 if (ret)395 return ret;396 }397 398 exynos_plane = &ctx->planes[DEFAULT_WIN];399 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,400 EXYNOS_DISPLAY_TYPE_VIDI, &vidi_crtc_ops, ctx);401 if (IS_ERR(ctx->crtc)) {402 DRM_DEV_ERROR(dev, "failed to create crtc.\n");403 return PTR_ERR(ctx->crtc);404 }405 406 drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_TMDS);407 408 drm_encoder_helper_add(encoder, &exynos_vidi_encoder_helper_funcs);409 410 ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_VIDI);411 if (ret < 0)412 return ret;413 414 ret = vidi_create_connector(encoder);415 if (ret) {416 DRM_DEV_ERROR(dev, "failed to create connector ret = %d\n",417 ret);418 drm_encoder_cleanup(encoder);419 return ret;420 }421 422 return 0;423}424 425 426static void vidi_unbind(struct device *dev, struct device *master, void *data)427{428 struct vidi_context *ctx = dev_get_drvdata(dev);429 430 del_timer_sync(&ctx->timer);431}432 433static const struct component_ops vidi_component_ops = {434 .bind = vidi_bind,435 .unbind = vidi_unbind,436};437 438static int vidi_probe(struct platform_device *pdev)439{440 struct vidi_context *ctx;441 struct device *dev = &pdev->dev;442 443 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);444 if (!ctx)445 return -ENOMEM;446 447 ctx->dev = dev;448 449 timer_setup(&ctx->timer, vidi_fake_vblank_timer, 0);450 451 mutex_init(&ctx->lock);452 453 platform_set_drvdata(pdev, ctx);454 455 return component_add(dev, &vidi_component_ops);456}457 458static void vidi_remove(struct platform_device *pdev)459{460 struct vidi_context *ctx = platform_get_drvdata(pdev);461 462 drm_edid_free(ctx->raw_edid);463 ctx->raw_edid = NULL;464 465 component_del(&pdev->dev, &vidi_component_ops);466}467 468struct platform_driver vidi_driver = {469 .probe = vidi_probe,470 .remove_new = vidi_remove,471 .driver = {472 .name = "exynos-drm-vidi",473 .dev_groups = vidi_groups,474 },475};476