1 /* 2 * Copyright (C) 2013 Red Hat 3 * Author: Rob Clark <robdclark@gmail.com> 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 as published by 7 * the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * You should have received a copy of the GNU General Public License along with 15 * this program. If not, see <http://www.gnu.org/licenses/>. 16 */ 17 18 #include "msm_drv.h" 19 20 #include "drm_crtc.h" 21 #include "drm_crtc_helper.h" 22 23 struct msm_framebuffer { 24 struct drm_framebuffer base; 25 const struct msm_format *format; 26 struct drm_gem_object *planes[2]; 27 }; 28 #define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base) 29 30 31 static int msm_framebuffer_create_handle(struct drm_framebuffer *fb, 32 struct drm_file *file_priv, 33 unsigned int *handle) 34 { 35 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 36 return drm_gem_handle_create(file_priv, 37 msm_fb->planes[0], handle); 38 } 39 40 static void msm_framebuffer_destroy(struct drm_framebuffer *fb) 41 { 42 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 43 int i, n = drm_format_num_planes(fb->pixel_format); 44 45 DBG("destroy: FB ID: %d (%p)", fb->base.id, fb); 46 47 drm_framebuffer_cleanup(fb); 48 49 for (i = 0; i < n; i++) { 50 struct drm_gem_object *bo = msm_fb->planes[i]; 51 if (bo) 52 drm_gem_object_unreference_unlocked(bo); 53 } 54 55 kfree(msm_fb); 56 } 57 58 static int msm_framebuffer_dirty(struct drm_framebuffer *fb, 59 struct drm_file *file_priv, unsigned flags, unsigned color, 60 struct drm_clip_rect *clips, unsigned num_clips) 61 { 62 return 0; 63 } 64 65 static const struct drm_framebuffer_funcs msm_framebuffer_funcs = { 66 .create_handle = msm_framebuffer_create_handle, 67 .destroy = msm_framebuffer_destroy, 68 .dirty = msm_framebuffer_dirty, 69 }; 70 71 #ifdef CONFIG_DEBUG_FS 72 void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m) 73 { 74 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 75 int i, n = drm_format_num_planes(fb->pixel_format); 76 77 seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n", 78 fb->width, fb->height, (char *)&fb->pixel_format, 79 fb->refcount.refcount.counter, fb->base.id); 80 81 for (i = 0; i < n; i++) { 82 seq_printf(m, " %d: offset=%d pitch=%d, obj: ", 83 i, fb->offsets[i], fb->pitches[i]); 84 msm_gem_describe(msm_fb->planes[i], m); 85 } 86 } 87 #endif 88 89 struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane) 90 { 91 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 92 return msm_fb->planes[plane]; 93 } 94 95 const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb) 96 { 97 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 98 return msm_fb->format; 99 } 100 101 struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev, 102 struct drm_file *file, struct drm_mode_fb_cmd2 *mode_cmd) 103 { 104 struct drm_gem_object *bos[4] = {0}; 105 struct drm_framebuffer *fb; 106 int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format); 107 108 for (i = 0; i < n; i++) { 109 bos[i] = drm_gem_object_lookup(dev, file, 110 mode_cmd->handles[i]); 111 if (!bos[i]) { 112 ret = -ENXIO; 113 goto out_unref; 114 } 115 } 116 117 fb = msm_framebuffer_init(dev, mode_cmd, bos); 118 if (IS_ERR(fb)) { 119 ret = PTR_ERR(fb); 120 goto out_unref; 121 } 122 123 return fb; 124 125 out_unref: 126 for (i = 0; i < n; i++) 127 drm_gem_object_unreference_unlocked(bos[i]); 128 return ERR_PTR(ret); 129 } 130 131 struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev, 132 struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) 133 { 134 struct msm_drm_private *priv = dev->dev_private; 135 struct msm_kms *kms = priv->kms; 136 struct msm_framebuffer *msm_fb; 137 struct drm_framebuffer *fb = NULL; 138 const struct msm_format *format; 139 int ret, i, n; 140 unsigned int hsub, vsub; 141 142 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)", 143 dev, mode_cmd, mode_cmd->width, mode_cmd->height, 144 (char *)&mode_cmd->pixel_format); 145 146 n = drm_format_num_planes(mode_cmd->pixel_format); 147 hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format); 148 vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format); 149 150 format = kms->funcs->get_format(kms, mode_cmd->pixel_format); 151 if (!format) { 152 dev_err(dev->dev, "unsupported pixel format: %4.4s\n", 153 (char *)&mode_cmd->pixel_format); 154 ret = -EINVAL; 155 goto fail; 156 } 157 158 msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL); 159 if (!msm_fb) { 160 ret = -ENOMEM; 161 goto fail; 162 } 163 164 fb = &msm_fb->base; 165 166 msm_fb->format = format; 167 168 for (i = 0; i < n; i++) { 169 unsigned int width = mode_cmd->width / (i ? hsub : 1); 170 unsigned int height = mode_cmd->height / (i ? vsub : 1); 171 unsigned int min_size; 172 173 min_size = (height - 1) * mode_cmd->pitches[i] 174 + width * drm_format_plane_cpp(mode_cmd->pixel_format, i) 175 + mode_cmd->offsets[i]; 176 177 if (bos[i]->size < min_size) { 178 ret = -EINVAL; 179 goto fail; 180 } 181 182 msm_fb->planes[i] = bos[i]; 183 } 184 185 drm_helper_mode_fill_fb_struct(fb, mode_cmd); 186 187 ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs); 188 if (ret) { 189 dev_err(dev->dev, "framebuffer init failed: %d\n", ret); 190 goto fail; 191 } 192 193 DBG("create: FB ID: %d (%p)", fb->base.id, fb); 194 195 return fb; 196 197 fail: 198 if (fb) 199 msm_framebuffer_destroy(fb); 200 201 return ERR_PTR(ret); 202 } 203