/* exynos_drm_fb.c * * Copyright (c) 2011 Samsung Electronics Co., Ltd. * Authors: * Inki Dae * Joonyoung Shim * Seung-Woo Kim * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. */ #include "drmP.h" #include "drm_crtc.h" #include "drm_crtc_helper.h" #include "drm_fb_helper.h" #include "exynos_drm_drv.h" #include "exynos_drm_fb.h" #include "exynos_drm_buf.h" #include "exynos_drm_gem.h" #define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb) /* * exynos specific framebuffer structure. * * @fb: drm framebuffer obejct. * @exynos_gem_obj: exynos specific gem object containing a gem object. * @buffer: pointer to exynos_drm_gem_buffer object. * - contain the memory information to memory region allocated * at default framebuffer creation. */ struct exynos_drm_fb { struct drm_framebuffer fb; struct exynos_drm_gem_obj *exynos_gem_obj; struct exynos_drm_gem_buf *buffer; }; static void exynos_drm_fb_destroy(struct drm_framebuffer *fb) { struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); DRM_DEBUG_KMS("%s\n", __FILE__); drm_framebuffer_cleanup(fb); /* * default framebuffer has no gem object so * a buffer of the default framebuffer should be released at here. */ if (!exynos_fb->exynos_gem_obj && exynos_fb->buffer) exynos_drm_buf_destroy(fb->dev, exynos_fb->buffer); kfree(exynos_fb); exynos_fb = NULL; } static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb, struct drm_file *file_priv, unsigned int *handle) { struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); DRM_DEBUG_KMS("%s\n", __FILE__); return drm_gem_handle_create(file_priv, &exynos_fb->exynos_gem_obj->base, handle); } static int exynos_drm_fb_dirty(struct drm_framebuffer *fb, struct drm_file *file_priv, unsigned flags, unsigned color, struct drm_clip_rect *clips, unsigned num_clips) { DRM_DEBUG_KMS("%s\n", __FILE__); /* TODO */ return 0; } static struct drm_framebuffer_funcs exynos_drm_fb_funcs = { .destroy = exynos_drm_fb_destroy, .create_handle = exynos_drm_fb_create_handle, .dirty = exynos_drm_fb_dirty, }; static struct drm_framebuffer * exynos_drm_fb_init(struct drm_file *file_priv, struct drm_device *dev, struct drm_mode_fb_cmd2 *mode_cmd) { struct exynos_drm_fb *exynos_fb; struct drm_framebuffer *fb; struct exynos_drm_gem_obj *exynos_gem_obj = NULL; struct drm_gem_object *obj; unsigned int size; int ret; DRM_DEBUG_KMS("%s\n", __FILE__); DRM_LOG_KMS("drm fb create(%dx%d)\n", mode_cmd->width, mode_cmd->height); exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL); if (!exynos_fb) { DRM_ERROR("failed to allocate exynos drm framebuffer.\n"); return ERR_PTR(-ENOMEM); } fb = &exynos_fb->fb; ret = drm_framebuffer_init(dev, fb, &exynos_drm_fb_funcs); if (ret) { DRM_ERROR("failed to initialize framebuffer.\n"); goto err_init; } DRM_LOG_KMS("create: fb id: %d\n", fb->base.id); size = mode_cmd->pitches[0] * mode_cmd->height; /* * mode_cmd->handles[0] could be NULL at booting time or * with user request. if NULL, a new buffer or a gem object * would be allocated. */ if (!mode_cmd->handles[0]) { if (!file_priv) { struct exynos_drm_gem_buf *buffer; /* * in case that file_priv is NULL, it allocates * only buffer and this buffer would be used * for default framebuffer. */ buffer = exynos_drm_buf_create(dev, size); if (!buffer) { ret = -ENOMEM; goto err_buffer; } exynos_fb->buffer = buffer; DRM_LOG_KMS("default: dma_addr = 0x%lx, size = 0x%x\n", (unsigned long)buffer->dma_addr, size); goto out; } else { exynos_gem_obj = exynos_drm_gem_create(dev, size); if (IS_ERR(exynos_gem_obj)) { ret = PTR_ERR(exynos_gem_obj); goto err_buffer; } } } else { obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]); if (!obj) { DRM_ERROR("failed to lookup gem object.\n"); goto err_buffer; } exynos_gem_obj = to_exynos_gem_obj(obj); drm_gem_object_unreference_unlocked(obj); } /* * if got a exynos_gem_obj from either a handle or * a new creation then exynos_fb->exynos_gem_obj is NULL * so that default framebuffer has no its own gem object, * only its own buffer object. */ exynos_fb->buffer = exynos_gem_obj->buffer; DRM_LOG_KMS("dma_addr = 0x%lx, size = 0x%x, gem object = 0x%x\n", (unsigned long)exynos_fb->buffer->dma_addr, size, (unsigned int)&exynos_gem_obj->base); out: exynos_fb->exynos_gem_obj = exynos_gem_obj; drm_helper_mode_fill_fb_struct(fb, mode_cmd); return fb; err_buffer: drm_framebuffer_cleanup(fb); err_init: kfree(exynos_fb); return ERR_PTR(ret); } struct drm_framebuffer *exynos_drm_fb_create(struct drm_device *dev, struct drm_file *file_priv, struct drm_mode_fb_cmd2 *mode_cmd) { DRM_DEBUG_KMS("%s\n", __FILE__); return exynos_drm_fb_init(file_priv, dev, mode_cmd); } struct exynos_drm_gem_buf *exynos_drm_fb_get_buf(struct drm_framebuffer *fb) { struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); struct exynos_drm_gem_buf *buffer; DRM_DEBUG_KMS("%s\n", __FILE__); buffer = exynos_fb->buffer; if (!buffer) return NULL; DRM_DEBUG_KMS("vaddr = 0x%lx, dma_addr = 0x%lx\n", (unsigned long)buffer->kvaddr, (unsigned long)buffer->dma_addr); return buffer; } static void exynos_drm_output_poll_changed(struct drm_device *dev) { struct exynos_drm_private *private = dev->dev_private; struct drm_fb_helper *fb_helper = private->fb_helper; if (fb_helper) drm_fb_helper_hotplug_event(fb_helper); } static struct drm_mode_config_funcs exynos_drm_mode_config_funcs = { .fb_create = exynos_drm_fb_create, .output_poll_changed = exynos_drm_output_poll_changed, }; void exynos_drm_mode_config_init(struct drm_device *dev) { dev->mode_config.min_width = 0; dev->mode_config.min_height = 0; /* * set max width and height as default value(4096x4096). * this value would be used to check framebuffer size limitation * at drm_mode_addfb(). */ dev->mode_config.max_width = 4096; dev->mode_config.max_height = 4096; dev->mode_config.funcs = &exynos_drm_mode_config_funcs; } MODULE_AUTHOR("Inki Dae "); MODULE_AUTHOR("Joonyoung Shim "); MODULE_AUTHOR("Seung-Woo Kim "); MODULE_DESCRIPTION("Samsung SoC DRM FB Driver"); MODULE_LICENSE("GPL");