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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 | // SPDX-License-Identifier: GPL-2.0-or-later /* exynos_drm_fb.c * * Copyright (c) 2011 Samsung Electronics Co., Ltd. * Authors: * Inki Dae <inki.dae@samsung.com> * Joonyoung Shim <jy0922.shim@samsung.com> * Seung-Woo Kim <sw0312.kim@samsung.com> */ #include <drm/drm_atomic.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_crtc.h> #include <drm/drm_fb_helper.h> #include <drm/drm_framebuffer.h> #include <drm/drm_fourcc.h> #include <drm/drm_gem_framebuffer_helper.h> #include <drm/drm_probe_helper.h> #include <drm/exynos_drm.h> #include "exynos_drm_crtc.h" #include "exynos_drm_drv.h" #include "exynos_drm_fb.h" #include "exynos_drm_fbdev.h" static int check_fb_gem_memory_type(struct drm_device *drm_dev, struct exynos_drm_gem *exynos_gem) { 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->flags; /* * Physically non-contiguous memory type for framebuffer is not * supported without IOMMU. */ if (IS_NONCONTIG_BUFFER(flags)) { DRM_DEV_ERROR(drm_dev->dev, "Non-contiguous GEM memory is not supported.\n"); return -EINVAL; } return 0; } static const struct drm_framebuffer_funcs exynos_drm_fb_funcs = { .destroy = drm_gem_fb_destroy, .create_handle = drm_gem_fb_create_handle, }; struct drm_framebuffer * exynos_drm_framebuffer_init(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd, struct exynos_drm_gem **exynos_gem, int count) { struct drm_framebuffer *fb; int i; int ret; fb = kzalloc(sizeof(*fb), GFP_KERNEL); if (!fb) return ERR_PTR(-ENOMEM); for (i = 0; i < count; i++) { ret = check_fb_gem_memory_type(dev, exynos_gem[i]); if (ret < 0) goto err; fb->obj[i] = &exynos_gem[i]->base; } drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); ret = drm_framebuffer_init(dev, fb, &exynos_drm_fb_funcs); if (ret < 0) { DRM_DEV_ERROR(dev->dev, "failed to initialize framebuffer\n"); goto err; } return fb; err: kfree(fb); return ERR_PTR(ret); } static struct drm_framebuffer * exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv, const struct drm_mode_fb_cmd2 *mode_cmd) { const struct drm_format_info *info = drm_get_format_info(dev, mode_cmd); struct exynos_drm_gem *exynos_gem[MAX_FB_BUFFER]; struct drm_framebuffer *fb; int i; int ret; for (i = 0; i < info->num_planes; i++) { unsigned int height = (i == 0) ? mode_cmd->height : DIV_ROUND_UP(mode_cmd->height, info->vsub); unsigned long size = height * mode_cmd->pitches[i] + mode_cmd->offsets[i]; exynos_gem[i] = exynos_drm_gem_get(file_priv, mode_cmd->handles[i]); if (!exynos_gem[i]) { DRM_DEV_ERROR(dev->dev, "failed to lookup gem object\n"); ret = -ENOENT; goto err; } if (size > exynos_gem[i]->size) { i++; ret = -EINVAL; goto err; } } fb = exynos_drm_framebuffer_init(dev, mode_cmd, exynos_gem, i); if (IS_ERR(fb)) { ret = PTR_ERR(fb); goto err; } return fb; err: while (i--) exynos_drm_gem_put(exynos_gem[i]); return ERR_PTR(ret); } dma_addr_t exynos_drm_fb_dma_addr(struct drm_framebuffer *fb, int index) { struct exynos_drm_gem *exynos_gem; if (WARN_ON_ONCE(index >= MAX_FB_BUFFER)) return 0; exynos_gem = to_exynos_gem(fb->obj[index]); return exynos_gem->dma_addr + fb->offsets[index]; } static struct drm_mode_config_helper_funcs exynos_drm_mode_config_helpers = { .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm, }; static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = { .fb_create = exynos_user_fb_create, .output_poll_changed = drm_fb_helper_output_poll_changed, .atomic_check = drm_atomic_helper_check, .atomic_commit = drm_atomic_helper_commit, }; 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; dev->mode_config.helper_private = &exynos_drm_mode_config_helpers; dev->mode_config.normalize_zpos = true; } |