/* 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 "exynos_drm_drv.h" #include "exynos_drm_crtc.h" #include "exynos_drm_encoder.h" #include "exynos_drm_vidi.h" /* vidi has totally three virtual windows. */ #define WINDOWS_NR 3 #define get_vidi_context(dev) platform_get_drvdata(to_platform_device(dev)) struct vidi_win_data { unsigned int offset_x; unsigned int offset_y; unsigned int ovl_width; unsigned int ovl_height; unsigned int fb_width; unsigned int fb_height; unsigned int bpp; dma_addr_t dma_addr; unsigned int buf_offsize; unsigned int line_size; /* bytes */ bool enabled; }; struct vidi_context { struct exynos_drm_subdrv subdrv; struct drm_crtc *crtc; struct vidi_win_data win_data[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; }; 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 bool vidi_display_is_connected(struct device *dev) { struct vidi_context *ctx = get_vidi_context(dev); /* * connection request would come from user side * to do hotplug through specific ioctl. */ return ctx->connected ? true : false; } static struct edid *vidi_get_edid(struct device *dev, struct drm_connector *connector) { struct vidi_context *ctx = get_vidi_context(dev); struct edid *edid; /* * 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 ERR_PTR(-EFAULT); } edid = drm_edid_duplicate(ctx->raw_edid); if (!edid) { DRM_DEBUG_KMS("failed to allocate edid\n"); return ERR_PTR(-ENOMEM); } return edid; } static void *vidi_get_panel(struct device *dev) { /* TODO. */ return NULL; } static int vidi_check_mode(struct device *dev, struct drm_display_mode *mode) { /* TODO. */ return 0; } static int vidi_display_power_on(struct device *dev, int mode) { /* TODO */ return 0; } static struct exynos_drm_display_ops vidi_display_ops = { .type = EXYNOS_DISPLAY_TYPE_VIDI, .is_connected = vidi_display_is_connected, .get_edid = vidi_get_edid, .get_panel = vidi_get_panel, .check_mode = vidi_check_mode, .power_on = vidi_display_power_on, }; static void vidi_dpms(struct device *subdrv_dev, int mode) { struct vidi_context *ctx = get_vidi_context(subdrv_dev); DRM_DEBUG_KMS("%d\n", mode); mutex_lock(&ctx->lock); switch (mode) { case DRM_MODE_DPMS_ON: /* TODO. */ break; case DRM_MODE_DPMS_STANDBY: case DRM_MODE_DPMS_SUSPEND: case DRM_MODE_DPMS_OFF: /* TODO. */ break; default: DRM_DEBUG_KMS("unspecified mode %d\n", mode); break; } mutex_unlock(&ctx->lock); } static void vidi_apply(struct device *subdrv_dev) { struct vidi_context *ctx = get_vidi_context(subdrv_dev); struct exynos_drm_manager *mgr = ctx->subdrv.manager; struct exynos_drm_manager_ops *mgr_ops = mgr->ops; struct vidi_win_data *win_data; int i; for (i = 0; i < WINDOWS_NR; i++) { win_data = &ctx->win_data[i]; if (win_data->enabled && (mgr_ops && mgr_ops->win_commit)) mgr_ops->win_commit(subdrv_dev, i); } if (mgr_ops && mgr_ops->commit) mgr_ops->commit(subdrv_dev); } static void vidi_commit(struct device *dev) { struct vidi_context *ctx = get_vidi_context(dev); if (ctx->suspended) return; } static int vidi_enable_vblank(struct device *dev) { struct vidi_context *ctx = get_vidi_context(dev); 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 manager_ops->win_commit callback */ schedule_work(&ctx->work); return 0; } static void vidi_disable_vblank(struct device *dev) { struct vidi_context *ctx = get_vidi_context(dev); if (ctx->suspended) return; if (test_and_clear_bit(0, &ctx->irq_flags)) ctx->vblank_on = false; } static void vidi_win_mode_set(struct device *dev, struct exynos_drm_overlay *overlay) { struct vidi_context *ctx = get_vidi_context(dev); struct vidi_win_data *win_data; int win; unsigned long offset; if (!overlay) { dev_err(dev, "overlay is NULL\n"); return; } win = overlay->zpos; if (win == DEFAULT_ZPOS) win = ctx->default_win; if (win < 0 || win >= WINDOWS_NR) return; offset = overlay->fb_x * (overlay->bpp >> 3); offset += overlay->fb_y * overlay->pitch; DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch); win_data = &ctx->win_data[win]; win_data->offset_x = overlay->crtc_x; win_data->offset_y = overlay->crtc_y; win_data->ovl_width = overlay->crtc_width; win_data->ovl_height = overlay->crtc_height; win_data->fb_width = overlay->fb_width; win_data->fb_height = overlay->fb_height; win_data->dma_addr = overlay->dma_addr[0] + offset; win_data->bpp = overlay->bpp; win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) * (overlay->bpp >> 3); win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3); /* * some parts of win_data should be transferred to user side * through specific ioctl. */ DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n", win_data->offset_x, win_data->offset_y); DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n", win_data->ovl_width, win_data->ovl_height); DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr); DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n", overlay->fb_width, overlay->crtc_width); } static void vidi_win_commit(struct device *dev, int zpos) { struct vidi_context *ctx = get_vidi_context(dev); struct vidi_win_data *win_data; int win = zpos; if (ctx->suspended) return; if (win == DEFAULT_ZPOS) win = ctx->default_win; if (win < 0 || win >= WINDOWS_NR) return; win_data = &ctx->win_data[win]; win_data->enabled = true; DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data->dma_addr); if (ctx->vblank_on) schedule_work(&ctx->work); } static void vidi_win_disable(struct device *dev, int zpos) { struct vidi_context *ctx = get_vidi_context(dev); struct vidi_win_data *win_data; int win = zpos; if (win == DEFAULT_ZPOS) win = ctx->default_win; if (win < 0 || win >= WINDOWS_NR) return; win_data = &ctx->win_data[win]; win_data->enabled = false; /* TODO. */ } static struct exynos_drm_manager_ops vidi_manager_ops = { .dpms = vidi_dpms, .apply = vidi_apply, .commit = vidi_commit, .enable_vblank = vidi_enable_vblank, .disable_vblank = vidi_disable_vblank, .win_mode_set = vidi_win_mode_set, .win_commit = vidi_win_commit, .win_disable = vidi_win_disable, }; static struct exynos_drm_manager vidi_manager = { .pipe = -1, .ops = &vidi_manager_ops, .display_ops = &vidi_display_ops, }; static void vidi_fake_vblank_handler(struct work_struct *work) { struct vidi_context *ctx = container_of(work, struct vidi_context, work); struct exynos_drm_subdrv *subdrv = &ctx->subdrv; struct exynos_drm_manager *manager = subdrv->manager; if (manager->pipe < 0) return; /* refresh rate is about 50Hz. */ usleep_range(16000, 20000); mutex_lock(&ctx->lock); if (ctx->direct_vblank) { drm_handle_vblank(subdrv->drm_dev, manager->pipe); ctx->direct_vblank = false; mutex_unlock(&ctx->lock); return; } mutex_unlock(&ctx->lock); exynos_drm_crtc_finish_pageflip(subdrv->drm_dev, manager->pipe); } static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev) { /* * enable drm irq mode. * - with irq_enabled = true, we can use the vblank feature. * * P.S. note that we wouldn't use drm irq handler but * just specific driver own one instead because * drm framework supports only one irq handler. */ drm_dev->irq_enabled = true; /* * with vblank_disable_allowed = true, vblank interrupt will be disabled * by drm timer once a current process gives up ownership of * vblank event.(after drm_vblank_put function is called) */ drm_dev->vblank_disable_allowed = true; return 0; } static void vidi_subdrv_remove(struct drm_device *drm_dev, struct device *dev) { /* TODO. */ } static int vidi_power_on(struct vidi_context *ctx, bool enable) { struct exynos_drm_subdrv *subdrv = &ctx->subdrv; struct device *dev = subdrv->dev; if (enable) { ctx->suspended = false; /* if vblank was enabled status, enable it again. */ if (test_and_clear_bit(0, &ctx->irq_flags)) vidi_enable_vblank(dev); vidi_apply(dev); } else { ctx->suspended = true; } return 0; } static int vidi_show_connection(struct device *dev, struct device_attribute *attr, char *buf) { int rc; struct vidi_context *ctx = get_vidi_context(dev); 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 = get_vidi_context(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->subdrv.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 = NULL; struct drm_encoder *encoder; struct exynos_drm_manager *manager; struct exynos_drm_display_ops *display_ops; 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; } list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list, head) { manager = exynos_drm_get_manager(encoder); display_ops = manager->display_ops; if (display_ops->type == EXYNOS_DISPLAY_TYPE_VIDI) { ctx = get_vidi_context(manager->dev); break; } } if (!ctx) { DRM_DEBUG_KMS("not found virtual device type encoder.\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->subdrv.drm_dev); return 0; } static int vidi_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct vidi_context *ctx; struct exynos_drm_subdrv *subdrv; int ret; ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); if (!ctx) return -ENOMEM; ctx->default_win = 0; INIT_WORK(&ctx->work, vidi_fake_vblank_handler); subdrv = &ctx->subdrv; subdrv->dev = dev; subdrv->manager = &vidi_manager; subdrv->probe = vidi_subdrv_probe; subdrv->remove = vidi_subdrv_remove; mutex_init(&ctx->lock); platform_set_drvdata(pdev, ctx); ret = device_create_file(dev, &dev_attr_connection); if (ret < 0) DRM_INFO("failed to create connection sysfs.\n"); exynos_drm_subdrv_register(subdrv); return 0; } static int vidi_remove(struct platform_device *pdev) { struct vidi_context *ctx = platform_get_drvdata(pdev); exynos_drm_subdrv_unregister(&ctx->subdrv); if (ctx->raw_edid != (struct edid *)fake_edid_info) { kfree(ctx->raw_edid); ctx->raw_edid = NULL; } return 0; } #ifdef CONFIG_PM_SLEEP static int vidi_suspend(struct device *dev) { struct vidi_context *ctx = get_vidi_context(dev); return vidi_power_on(ctx, false); } static int vidi_resume(struct device *dev) { struct vidi_context *ctx = get_vidi_context(dev); return vidi_power_on(ctx, true); } #endif static const struct dev_pm_ops vidi_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend, vidi_resume) }; struct platform_driver vidi_driver = { .probe = vidi_probe, .remove = vidi_remove, .driver = { .name = "exynos-drm-vidi", .owner = THIS_MODULE, .pm = &vidi_pm_ops, }, };