238 lines
5.7 KiB
C
238 lines
5.7 KiB
C
/* exynos_drm_fb.c
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*
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* Copyright (c) 2011 Samsung Electronics Co., Ltd.
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* Authors:
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* Inki Dae <inki.dae@samsung.com>
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* Joonyoung Shim <jy0922.shim@samsung.com>
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* Seung-Woo Kim <sw0312.kim@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <drm/drmP.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_atomic.h>
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#include <drm/drm_atomic_helper.h>
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#include <uapi/drm/exynos_drm.h>
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#include "exynos_drm_drv.h"
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#include "exynos_drm_fb.h"
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#include "exynos_drm_fbdev.h"
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#include "exynos_drm_iommu.h"
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#include "exynos_drm_crtc.h"
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#define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb)
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/*
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* exynos specific framebuffer structure.
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*
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* @fb: drm framebuffer obejct.
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* @exynos_gem: array of exynos specific gem object containing a gem object.
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*/
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struct exynos_drm_fb {
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struct drm_framebuffer fb;
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struct exynos_drm_gem *exynos_gem[MAX_FB_BUFFER];
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dma_addr_t dma_addr[MAX_FB_BUFFER];
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};
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static int check_fb_gem_memory_type(struct drm_device *drm_dev,
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struct exynos_drm_gem *exynos_gem)
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{
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unsigned int flags;
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/*
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* if exynos drm driver supports iommu then framebuffer can use
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* all the buffer types.
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*/
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if (is_drm_iommu_supported(drm_dev))
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return 0;
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flags = exynos_gem->flags;
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/*
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* without iommu support, not support physically non-continuous memory
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* for framebuffer.
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*/
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if (IS_NONCONTIG_BUFFER(flags)) {
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DRM_ERROR("cannot use this gem memory type for fb.\n");
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return -EINVAL;
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}
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return 0;
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}
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static void exynos_drm_fb_destroy(struct drm_framebuffer *fb)
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{
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struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
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unsigned int i;
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/* make sure that overlay data are updated before relesing fb. */
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exynos_drm_crtc_complete_scanout(fb);
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drm_framebuffer_cleanup(fb);
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for (i = 0; i < ARRAY_SIZE(exynos_fb->exynos_gem); i++) {
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struct drm_gem_object *obj;
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if (exynos_fb->exynos_gem[i] == NULL)
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continue;
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obj = &exynos_fb->exynos_gem[i]->base;
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drm_gem_object_unreference_unlocked(obj);
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}
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kfree(exynos_fb);
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exynos_fb = NULL;
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}
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static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb,
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struct drm_file *file_priv,
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unsigned int *handle)
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{
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struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
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return drm_gem_handle_create(file_priv,
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&exynos_fb->exynos_gem[0]->base, handle);
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}
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static int exynos_drm_fb_dirty(struct drm_framebuffer *fb,
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struct drm_file *file_priv, unsigned flags,
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unsigned color, struct drm_clip_rect *clips,
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unsigned num_clips)
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{
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/* TODO */
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return 0;
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}
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static const struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
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.destroy = exynos_drm_fb_destroy,
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.create_handle = exynos_drm_fb_create_handle,
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.dirty = exynos_drm_fb_dirty,
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};
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struct drm_framebuffer *
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exynos_drm_framebuffer_init(struct drm_device *dev,
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const struct drm_mode_fb_cmd2 *mode_cmd,
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struct exynos_drm_gem **exynos_gem,
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int count)
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{
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struct exynos_drm_fb *exynos_fb;
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int i;
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int ret;
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exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
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if (!exynos_fb)
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return ERR_PTR(-ENOMEM);
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for (i = 0; i < count; i++) {
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ret = check_fb_gem_memory_type(dev, exynos_gem[i]);
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if (ret < 0)
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goto err;
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exynos_fb->exynos_gem[i] = exynos_gem[i];
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exynos_fb->dma_addr[i] = exynos_gem[i]->dma_addr
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+ mode_cmd->offsets[i];
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}
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drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);
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ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs);
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if (ret < 0) {
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DRM_ERROR("failed to initialize framebuffer\n");
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goto err;
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}
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return &exynos_fb->fb;
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err:
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kfree(exynos_fb);
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return ERR_PTR(ret);
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}
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static struct drm_framebuffer *
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exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
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const struct drm_mode_fb_cmd2 *mode_cmd)
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{
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struct exynos_drm_gem *exynos_gem[MAX_FB_BUFFER];
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struct drm_gem_object *obj;
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struct drm_framebuffer *fb;
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int i;
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int ret;
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for (i = 0; i < drm_format_num_planes(mode_cmd->pixel_format); i++) {
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obj = drm_gem_object_lookup(dev, file_priv,
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mode_cmd->handles[i]);
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if (!obj) {
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DRM_ERROR("failed to lookup gem object\n");
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ret = -ENOENT;
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goto err;
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}
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exynos_gem[i] = to_exynos_gem(obj);
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}
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fb = exynos_drm_framebuffer_init(dev, mode_cmd, exynos_gem, i);
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if (IS_ERR(fb)) {
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ret = PTR_ERR(fb);
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goto err;
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}
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return fb;
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err:
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while (i--)
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drm_gem_object_unreference_unlocked(&exynos_gem[i]->base);
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return ERR_PTR(ret);
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}
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dma_addr_t exynos_drm_fb_dma_addr(struct drm_framebuffer *fb, int index)
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{
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struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
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if (index >= MAX_FB_BUFFER)
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return DMA_ERROR_CODE;
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return exynos_fb->dma_addr[index];
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}
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static void exynos_drm_output_poll_changed(struct drm_device *dev)
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{
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struct exynos_drm_private *private = dev->dev_private;
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struct drm_fb_helper *fb_helper = private->fb_helper;
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if (fb_helper)
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drm_fb_helper_hotplug_event(fb_helper);
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else
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exynos_drm_fbdev_init(dev);
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}
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static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
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.fb_create = exynos_user_fb_create,
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.output_poll_changed = exynos_drm_output_poll_changed,
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.atomic_check = drm_atomic_helper_check,
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.atomic_commit = exynos_atomic_commit,
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};
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void exynos_drm_mode_config_init(struct drm_device *dev)
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{
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dev->mode_config.min_width = 0;
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dev->mode_config.min_height = 0;
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/*
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* set max width and height as default value(4096x4096).
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* this value would be used to check framebuffer size limitation
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* at drm_mode_addfb().
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*/
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dev->mode_config.max_width = 4096;
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dev->mode_config.max_height = 4096;
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dev->mode_config.funcs = &exynos_drm_mode_config_funcs;
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}
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