/* exynos_drm_vidi.c * * Copyright (C) 2012 Samsung Electronics Co.Ltd * Authors: * Inki Dae * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * */ #include #include #include #include #include #include #include #include #include "exynos_drm_drv.h" #include "exynos_drm_crtc.h" #include "exynos_drm_plane.h" #include "exynos_drm_encoder.h" #include "exynos_drm_vidi.h" /* vidi has totally three virtual windows. */ #define WINDOWS_NR 3 #define ctx_from_connector(c) container_of(c, struct vidi_context, \ connector) struct vidi_context { struct exynos_drm_encoder encoder; struct platform_device *pdev; struct drm_device *drm_dev; struct exynos_drm_crtc *crtc; struct drm_connector connector; struct exynos_drm_plane planes[WINDOWS_NR]; struct edid *raw_edid; unsigned int clkdiv; unsigned int default_win; unsigned long irq_flags; unsigned int connected; bool vblank_on; bool suspended; bool direct_vblank; struct work_struct work; struct mutex lock; int pipe; }; static inline struct vidi_context *encoder_to_vidi(struct exynos_drm_encoder *e) { return container_of(e, struct vidi_context, encoder); } static const char fake_edid_info[] = { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05, 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78, 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd, 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00, 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18, 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1, 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83, 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00, 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c, 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a, 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c, 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06 }; static int vidi_enable_vblank(struct exynos_drm_crtc *crtc) { struct vidi_context *ctx = crtc->ctx; if (ctx->suspended) return -EPERM; if (!test_and_set_bit(0, &ctx->irq_flags)) ctx->vblank_on = true; ctx->direct_vblank = true; /* * in case of page flip request, vidi_finish_pageflip function * will not be called because direct_vblank is true and then * that function will be called by crtc_ops->update_plane callback */ schedule_work(&ctx->work); return 0; } static void vidi_disable_vblank(struct exynos_drm_crtc *crtc) { struct vidi_context *ctx = crtc->ctx; if (ctx->suspended) return; if (test_and_clear_bit(0, &ctx->irq_flags)) ctx->vblank_on = false; } static void vidi_update_plane(struct exynos_drm_crtc *crtc, struct exynos_drm_plane *plane) { struct vidi_context *ctx = crtc->ctx; if (ctx->suspended) return; DRM_DEBUG_KMS("dma_addr = %pad\n", plane->dma_addr); if (ctx->vblank_on) schedule_work(&ctx->work); } static void vidi_enable(struct exynos_drm_crtc *crtc) { struct vidi_context *ctx = crtc->ctx; mutex_lock(&ctx->lock); ctx->suspended = false; /* if vblank was enabled status, enable it again. */ if (test_and_clear_bit(0, &ctx->irq_flags)) vidi_enable_vblank(ctx->crtc); mutex_unlock(&ctx->lock); } static void vidi_disable(struct exynos_drm_crtc *crtc) { struct vidi_context *ctx = crtc->ctx; mutex_lock(&ctx->lock); ctx->suspended = true; mutex_unlock(&ctx->lock); } static int vidi_ctx_initialize(struct vidi_context *ctx, struct drm_device *drm_dev) { struct exynos_drm_private *priv = drm_dev->dev_private; ctx->drm_dev = drm_dev; ctx->pipe = priv->pipe++; return 0; } static const struct exynos_drm_crtc_ops vidi_crtc_ops = { .enable = vidi_enable, .disable = vidi_disable, .enable_vblank = vidi_enable_vblank, .disable_vblank = vidi_disable_vblank, .update_plane = vidi_update_plane, }; static void vidi_fake_vblank_handler(struct work_struct *work) { struct vidi_context *ctx = container_of(work, struct vidi_context, work); if (ctx->pipe < 0) return; /* refresh rate is about 50Hz. */ usleep_range(16000, 20000); mutex_lock(&ctx->lock); if (ctx->direct_vblank) { drm_crtc_handle_vblank(&ctx->crtc->base); ctx->direct_vblank = false; mutex_unlock(&ctx->lock); return; } mutex_unlock(&ctx->lock); exynos_drm_crtc_finish_pageflip(ctx->crtc); } static int vidi_show_connection(struct device *dev, struct device_attribute *attr, char *buf) { struct vidi_context *ctx = dev_get_drvdata(dev); int rc; mutex_lock(&ctx->lock); rc = sprintf(buf, "%d\n", ctx->connected); mutex_unlock(&ctx->lock); return rc; } static int vidi_store_connection(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { struct vidi_context *ctx = dev_get_drvdata(dev); int ret; ret = kstrtoint(buf, 0, &ctx->connected); if (ret) return ret; if (ctx->connected > 1) return -EINVAL; /* use fake edid data for test. */ if (!ctx->raw_edid) ctx->raw_edid = (struct edid *)fake_edid_info; /* if raw_edid isn't same as fake data then it can't be tested. */ if (ctx->raw_edid != (struct edid *)fake_edid_info) { DRM_DEBUG_KMS("edid data is not fake data.\n"); return -EINVAL; } DRM_DEBUG_KMS("requested connection.\n"); drm_helper_hpd_irq_event(ctx->drm_dev); return len; } static DEVICE_ATTR(connection, 0644, vidi_show_connection, vidi_store_connection); int vidi_connection_ioctl(struct drm_device *drm_dev, void *data, struct drm_file *file_priv) { struct vidi_context *ctx = dev_get_drvdata(drm_dev->dev); struct drm_exynos_vidi_connection *vidi = data; if (!vidi) { DRM_DEBUG_KMS("user data for vidi is null.\n"); return -EINVAL; } if (vidi->connection > 1) { DRM_DEBUG_KMS("connection should be 0 or 1.\n"); return -EINVAL; } if (ctx->connected == vidi->connection) { DRM_DEBUG_KMS("same connection request.\n"); return -EINVAL; } if (vidi->connection) { struct edid *raw_edid = (struct edid *)(uint32_t)vidi->edid; if (!drm_edid_is_valid(raw_edid)) { DRM_DEBUG_KMS("edid data is invalid.\n"); return -EINVAL; } ctx->raw_edid = drm_edid_duplicate(raw_edid); if (!ctx->raw_edid) { DRM_DEBUG_KMS("failed to allocate raw_edid.\n"); return -ENOMEM; } } else { /* * with connection = 0, free raw_edid * only if raw edid data isn't same as fake data. */ if (ctx->raw_edid && ctx->raw_edid != (struct edid *)fake_edid_info) { kfree(ctx->raw_edid); ctx->raw_edid = NULL; } } ctx->connected = vidi->connection; drm_helper_hpd_irq_event(ctx->drm_dev); return 0; } static enum drm_connector_status vidi_detect(struct drm_connector *connector, bool force) { struct vidi_context *ctx = ctx_from_connector(connector); /* * connection request would come from user side * to do hotplug through specific ioctl. */ return ctx->connected ? connector_status_connected : connector_status_disconnected; } static void vidi_connector_destroy(struct drm_connector *connector) { } static struct drm_connector_funcs vidi_connector_funcs = { .dpms = drm_atomic_helper_connector_dpms, .fill_modes = drm_helper_probe_single_connector_modes, .detect = vidi_detect, .destroy = vidi_connector_destroy, .reset = drm_atomic_helper_connector_reset, .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, }; static int vidi_get_modes(struct drm_connector *connector) { struct vidi_context *ctx = ctx_from_connector(connector); struct edid *edid; int edid_len; /* * the edid data comes from user side and it would be set * to ctx->raw_edid through specific ioctl. */ if (!ctx->raw_edid) { DRM_DEBUG_KMS("raw_edid is null.\n"); return -EFAULT; } edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH; edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL); if (!edid) { DRM_DEBUG_KMS("failed to allocate edid\n"); return -ENOMEM; } drm_mode_connector_update_edid_property(connector, edid); return drm_add_edid_modes(connector, edid); } static struct drm_encoder *vidi_best_encoder(struct drm_connector *connector) { struct vidi_context *ctx = ctx_from_connector(connector); return &ctx->encoder.base; } static struct drm_connector_helper_funcs vidi_connector_helper_funcs = { .get_modes = vidi_get_modes, .best_encoder = vidi_best_encoder, }; static int vidi_create_connector(struct exynos_drm_encoder *exynos_encoder) { struct vidi_context *ctx = encoder_to_vidi(exynos_encoder); struct drm_encoder *encoder = &exynos_encoder->base; struct drm_connector *connector = &ctx->connector; int ret; connector->polled = DRM_CONNECTOR_POLL_HPD; ret = drm_connector_init(ctx->drm_dev, connector, &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL); if (ret) { DRM_ERROR("Failed to initialize connector with drm\n"); return ret; } drm_connector_helper_add(connector, &vidi_connector_helper_funcs); drm_connector_register(connector); drm_mode_connector_attach_encoder(connector, encoder); return 0; } static struct exynos_drm_encoder_ops vidi_encoder_ops = { .create_connector = vidi_create_connector, }; static int vidi_bind(struct device *dev, struct device *master, void *data) { struct vidi_context *ctx = dev_get_drvdata(dev); struct drm_device *drm_dev = data; struct exynos_drm_plane *exynos_plane; enum drm_plane_type type; unsigned int zpos; int ret; vidi_ctx_initialize(ctx, drm_dev); for (zpos = 0; zpos < WINDOWS_NR; zpos++) { type = (zpos == ctx->default_win) ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; ret = exynos_plane_init(drm_dev, &ctx->planes[zpos], 1 << ctx->pipe, type, zpos); if (ret) return ret; } exynos_plane = &ctx->planes[ctx->default_win]; ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base, ctx->pipe, EXYNOS_DISPLAY_TYPE_VIDI, &vidi_crtc_ops, ctx); if (IS_ERR(ctx->crtc)) { DRM_ERROR("failed to create crtc.\n"); return PTR_ERR(ctx->crtc); } ret = exynos_drm_create_enc_conn(drm_dev, &ctx->encoder, EXYNOS_DISPLAY_TYPE_VIDI); if (ret) { ctx->crtc->base.funcs->destroy(&ctx->crtc->base); return ret; } return 0; } static void vidi_unbind(struct device *dev, struct device *master, void *data) { } static const struct component_ops vidi_component_ops = { .bind = vidi_bind, .unbind = vidi_unbind, }; static int vidi_probe(struct platform_device *pdev) { struct vidi_context *ctx; int ret; ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL); if (!ctx) return -ENOMEM; ctx->encoder.ops = &vidi_encoder_ops; ctx->default_win = 0; ctx->pdev = pdev; INIT_WORK(&ctx->work, vidi_fake_vblank_handler); mutex_init(&ctx->lock); platform_set_drvdata(pdev, ctx); ret = device_create_file(&pdev->dev, &dev_attr_connection); if (ret < 0) { DRM_ERROR("failed to create connection sysfs.\n"); return ret; } ret = component_add(&pdev->dev, &vidi_component_ops); if (ret) goto err_remove_file; return ret; err_remove_file: device_remove_file(&pdev->dev, &dev_attr_connection); return ret; } static int vidi_remove(struct platform_device *pdev) { struct vidi_context *ctx = platform_get_drvdata(pdev); if (ctx->raw_edid != (struct edid *)fake_edid_info) { kfree(ctx->raw_edid); ctx->raw_edid = NULL; return -EINVAL; } component_del(&pdev->dev, &vidi_component_ops); return 0; } struct platform_driver vidi_driver = { .probe = vidi_probe, .remove = vidi_remove, .driver = { .name = "exynos-drm-vidi", .owner = THIS_MODULE, }, };