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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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237556962e
Exynos DRM drivers should work with and without IOMMU. Providing common API generic to both scenarios should make code cleaner and allow further code improvements. The patch removes including of exynos_drm_iommu.h as the file contains mostly IOMMU specific stuff, instead it exposes exynos_drm_*_dma functions and puts them into exynos_drm_dma.c. Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
185 lines
4.4 KiB
C
185 lines
4.4 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 <drm/drm_gem_framebuffer_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_crtc.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_ERROR("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_ERROR("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_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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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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