/* exynos_drm_fb.c * * Copyright (c) 2011 Samsung Electronics Co., Ltd. * Authors: * Inki Dae * Joonyoung Shim * Seung-Woo Kim * * 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 "exynos_drm_drv.h" #include "exynos_drm_fb.h" #include "exynos_drm_gem.h" #include "exynos_drm_iommu.h" #include "exynos_drm_crtc.h" #define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb) /* * exynos specific framebuffer structure. * * @fb: drm framebuffer obejct. * @buf_cnt: a buffer count to drm framebuffer. * @exynos_gem_obj: array of exynos specific gem object containing a gem object. */ struct exynos_drm_fb { struct drm_framebuffer fb; unsigned int buf_cnt; struct exynos_drm_gem_obj *exynos_gem_obj[MAX_FB_BUFFER]; }; static int check_fb_gem_memory_type(struct drm_device *drm_dev, struct exynos_drm_gem_obj *exynos_gem_obj) { unsigned int flags; /* * if exynos drm driver supports iommu then framebuffer can use * all the buffer types. */ if (is_drm_iommu_supported(drm_dev)) return 0; flags = exynos_gem_obj->flags; /* * without iommu support, not support physically non-continuous memory * for framebuffer. */ if (IS_NONCONTIG_BUFFER(flags)) { DRM_ERROR("cannot use this gem memory type for fb.\n"); return -EINVAL; } return 0; } static void exynos_drm_fb_destroy(struct drm_framebuffer *fb) { struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); unsigned int i; /* make sure that overlay data are updated before relesing fb. */ exynos_drm_crtc_complete_scanout(fb); drm_framebuffer_cleanup(fb); for (i = 0; i < ARRAY_SIZE(exynos_fb->exynos_gem_obj); i++) { struct drm_gem_object *obj; if (exynos_fb->exynos_gem_obj[i] == NULL) continue; obj = &exynos_fb->exynos_gem_obj[i]->base; drm_gem_object_unreference_unlocked(obj); } 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); /* This fb should have only one gem object. */ if (WARN_ON(exynos_fb->buf_cnt != 1)) return -EINVAL; return drm_gem_handle_create(file_priv, &exynos_fb->exynos_gem_obj[0]->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) { /* 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, }; void exynos_drm_fb_set_buf_cnt(struct drm_framebuffer *fb, unsigned int cnt) { struct exynos_drm_fb *exynos_fb; exynos_fb = to_exynos_fb(fb); exynos_fb->buf_cnt = cnt; } unsigned int exynos_drm_fb_get_buf_cnt(struct drm_framebuffer *fb) { struct exynos_drm_fb *exynos_fb; exynos_fb = to_exynos_fb(fb); return exynos_fb->buf_cnt; } struct drm_framebuffer * exynos_drm_framebuffer_init(struct drm_device *dev, struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object *obj) { struct exynos_drm_fb *exynos_fb; struct exynos_drm_gem_obj *exynos_gem_obj; int ret; exynos_gem_obj = to_exynos_gem_obj(obj); ret = check_fb_gem_memory_type(dev, exynos_gem_obj); if (ret < 0) { DRM_ERROR("cannot use this gem memory type for fb.\n"); return ERR_PTR(-EINVAL); } exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL); if (!exynos_fb) return ERR_PTR(-ENOMEM); drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd); exynos_fb->exynos_gem_obj[0] = exynos_gem_obj; ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs); if (ret) { DRM_ERROR("failed to initialize framebuffer\n"); return ERR_PTR(ret); } return &exynos_fb->fb; } static u32 exynos_drm_format_num_buffers(struct drm_mode_fb_cmd2 *mode_cmd) { unsigned int cnt = 0; if (mode_cmd->pixel_format != DRM_FORMAT_NV12) return drm_format_num_planes(mode_cmd->pixel_format); while (cnt != MAX_FB_BUFFER) { if (!mode_cmd->handles[cnt]) break; cnt++; } /* * check if NV12 or NV12M. * * NV12 * handles[0] = base1, offsets[0] = 0 * handles[1] = base1, offsets[1] = Y_size * * NV12M * handles[0] = base1, offsets[0] = 0 * handles[1] = base2, offsets[1] = 0 */ if (cnt == 2) { /* * in case of NV12 format, offsets[1] is not 0 and * handles[0] is same as handles[1]. */ if (mode_cmd->offsets[1] && mode_cmd->handles[0] == mode_cmd->handles[1]) cnt = 1; } return cnt; } static struct drm_framebuffer * exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv, struct drm_mode_fb_cmd2 *mode_cmd) { struct drm_gem_object *obj; struct exynos_drm_gem_obj *exynos_gem_obj; struct exynos_drm_fb *exynos_fb; int i, ret; exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL); if (!exynos_fb) return ERR_PTR(-ENOMEM); obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]); if (!obj) { DRM_ERROR("failed to lookup gem object\n"); ret = -ENOENT; goto err_free; } drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd); exynos_fb->exynos_gem_obj[0] = to_exynos_gem_obj(obj); exynos_fb->buf_cnt = exynos_drm_format_num_buffers(mode_cmd); DRM_DEBUG_KMS("buf_cnt = %d\n", exynos_fb->buf_cnt); for (i = 1; i < exynos_fb->buf_cnt; i++) { obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[i]); if (!obj) { DRM_ERROR("failed to lookup gem object\n"); ret = -ENOENT; exynos_fb->buf_cnt = i; goto err_unreference; } exynos_gem_obj = to_exynos_gem_obj(obj); exynos_fb->exynos_gem_obj[i] = exynos_gem_obj; ret = check_fb_gem_memory_type(dev, exynos_gem_obj); if (ret < 0) { DRM_ERROR("cannot use this gem memory type for fb.\n"); goto err_unreference; } } ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs); if (ret) { DRM_ERROR("failed to init framebuffer.\n"); goto err_unreference; } return &exynos_fb->fb; err_unreference: for (i = 0; i < exynos_fb->buf_cnt; i++) { struct drm_gem_object *obj; obj = &exynos_fb->exynos_gem_obj[i]->base; if (obj) drm_gem_object_unreference_unlocked(obj); } err_free: kfree(exynos_fb); return ERR_PTR(ret); } struct exynos_drm_gem_buf *exynos_drm_fb_buffer(struct drm_framebuffer *fb, int index) { struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); struct exynos_drm_gem_buf *buffer; if (index >= MAX_FB_BUFFER) return NULL; buffer = exynos_fb->exynos_gem_obj[index]->buffer; if (!buffer) return NULL; DRM_DEBUG_KMS("dma_addr = 0x%lx\n", (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 const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = { .fb_create = exynos_user_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; }