184 lines
4.3 KiB
C
184 lines
4.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* 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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#include <drm/drm_atomic.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_fourcc.h>
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#include <drm/drm_gem_framebuffer_helper.h>
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#include <drm/drm_probe_helper.h>
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#include <drm/exynos_drm.h>
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#include "exynos_drm_crtc.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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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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* Physically non-contiguous memory type for framebuffer is not
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* supported without IOMMU.
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*/
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if (IS_NONCONTIG_BUFFER(flags)) {
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DRM_DEV_ERROR(drm_dev->dev,
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"Non-contiguous GEM memory is not supported.\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 const struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
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.destroy = drm_gem_fb_destroy,
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.create_handle = drm_gem_fb_create_handle,
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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 drm_framebuffer *fb;
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int i;
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int ret;
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fb = kzalloc(sizeof(*fb), GFP_KERNEL);
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if (!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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fb->obj[i] = &exynos_gem[i]->base;
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}
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drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
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ret = drm_framebuffer_init(dev, fb, &exynos_drm_fb_funcs);
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if (ret < 0) {
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DRM_DEV_ERROR(dev->dev,
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"failed to initialize framebuffer\n");
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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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kfree(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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const struct drm_format_info *info = drm_get_format_info(dev, mode_cmd);
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struct exynos_drm_gem *exynos_gem[MAX_FB_BUFFER];
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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 < info->num_planes; i++) {
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unsigned int height = (i == 0) ? mode_cmd->height :
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DIV_ROUND_UP(mode_cmd->height, info->vsub);
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unsigned long size = height * mode_cmd->pitches[i] +
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mode_cmd->offsets[i];
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exynos_gem[i] = exynos_drm_gem_get(file_priv,
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mode_cmd->handles[i]);
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if (!exynos_gem[i]) {
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DRM_DEV_ERROR(dev->dev,
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"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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if (size > exynos_gem[i]->size) {
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i++;
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ret = -EINVAL;
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goto err;
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}
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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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exynos_drm_gem_put(exynos_gem[i]);
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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_gem *exynos_gem;
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if (WARN_ON_ONCE(index >= MAX_FB_BUFFER))
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return 0;
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exynos_gem = to_exynos_gem(fb->obj[index]);
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return exynos_gem->dma_addr + fb->offsets[index];
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}
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static struct drm_mode_config_helper_funcs exynos_drm_mode_config_helpers = {
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.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
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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 = drm_fb_helper_output_poll_changed,
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.atomic_check = drm_atomic_helper_check,
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.atomic_commit = drm_atomic_helper_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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dev->mode_config.helper_private = &exynos_drm_mode_config_helpers;
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dev->mode_config.allow_fb_modifiers = true;
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dev->mode_config.normalize_zpos = true;
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}
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