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 #include "msm_kms.h" 20 21 #include "drm_crtc.h" 22 #include "drm_crtc_helper.h" 23 24 struct msm_framebuffer { 25 struct drm_framebuffer base; 26 const struct msm_format *format; 27 struct drm_gem_object *planes[MAX_PLANE]; 28 }; 29 #define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base) 30 31 32 static int msm_framebuffer_create_handle(struct drm_framebuffer *fb, 33 struct drm_file *file_priv, 34 unsigned int *handle) 35 { 36 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 37 return drm_gem_handle_create(file_priv, 38 msm_fb->planes[0], handle); 39 } 40 41 static void msm_framebuffer_destroy(struct drm_framebuffer *fb) 42 { 43 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 44 int i, n = drm_format_num_planes(fb->pixel_format); 45 46 DBG("destroy: FB ID: %d (%p)", fb->base.id, fb); 47 48 drm_framebuffer_cleanup(fb); 49 50 for (i = 0; i < n; i++) { 51 struct drm_gem_object *bo = msm_fb->planes[i]; 52 if (bo) 53 drm_gem_object_unreference_unlocked(bo); 54 } 55 56 kfree(msm_fb); 57 } 58 59 static int msm_framebuffer_dirty(struct drm_framebuffer *fb, 60 struct drm_file *file_priv, unsigned flags, unsigned color, 61 struct drm_clip_rect *clips, unsigned num_clips) 62 { 63 return 0; 64 } 65 66 static const struct drm_framebuffer_funcs msm_framebuffer_funcs = { 67 .create_handle = msm_framebuffer_create_handle, 68 .destroy = msm_framebuffer_destroy, 69 .dirty = msm_framebuffer_dirty, 70 }; 71 72 #ifdef CONFIG_DEBUG_FS 73 void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m) 74 { 75 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 76 int i, n = drm_format_num_planes(fb->pixel_format); 77 78 seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n", 79 fb->width, fb->height, (char *)&fb->pixel_format, 80 fb->refcount.refcount.counter, fb->base.id); 81 82 for (i = 0; i < n; i++) { 83 seq_printf(m, " %d: offset=%d pitch=%d, obj: ", 84 i, fb->offsets[i], fb->pitches[i]); 85 msm_gem_describe(msm_fb->planes[i], m); 86 } 87 } 88 #endif 89 90 /* prepare/pin all the fb's bo's for scanout. Note that it is not valid 91 * to prepare an fb more multiple different initiator 'id's. But that 92 * should be fine, since only the scanout (mdpN) side of things needs 93 * this, the gpu doesn't care about fb's. 94 */ 95 int msm_framebuffer_prepare(struct drm_framebuffer *fb, int id) 96 { 97 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 98 int ret, i, n = drm_format_num_planes(fb->pixel_format); 99 uint32_t iova; 100 101 for (i = 0; i < n; i++) { 102 ret = msm_gem_get_iova(msm_fb->planes[i], id, &iova); 103 DBG("FB[%u]: iova[%d]: %08x (%d)", fb->base.id, i, iova, ret); 104 if (ret) 105 return ret; 106 } 107 108 return 0; 109 } 110 111 void msm_framebuffer_cleanup(struct drm_framebuffer *fb, int id) 112 { 113 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 114 int i, n = drm_format_num_planes(fb->pixel_format); 115 116 for (i = 0; i < n; i++) 117 msm_gem_put_iova(msm_fb->planes[i], id); 118 } 119 120 uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb, int id, int plane) 121 { 122 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 123 if (!msm_fb->planes[plane]) 124 return 0; 125 return msm_gem_iova(msm_fb->planes[plane], id) + fb->offsets[plane]; 126 } 127 128 struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane) 129 { 130 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 131 return msm_fb->planes[plane]; 132 } 133 134 const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb) 135 { 136 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 137 return msm_fb->format; 138 } 139 140 struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev, 141 struct drm_file *file, struct drm_mode_fb_cmd2 *mode_cmd) 142 { 143 struct drm_gem_object *bos[4] = {0}; 144 struct drm_framebuffer *fb; 145 int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format); 146 147 for (i = 0; i < n; i++) { 148 bos[i] = drm_gem_object_lookup(dev, file, 149 mode_cmd->handles[i]); 150 if (!bos[i]) { 151 ret = -ENXIO; 152 goto out_unref; 153 } 154 } 155 156 fb = msm_framebuffer_init(dev, mode_cmd, bos); 157 if (IS_ERR(fb)) { 158 ret = PTR_ERR(fb); 159 goto out_unref; 160 } 161 162 return fb; 163 164 out_unref: 165 for (i = 0; i < n; i++) 166 drm_gem_object_unreference_unlocked(bos[i]); 167 return ERR_PTR(ret); 168 } 169 170 struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev, 171 struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) 172 { 173 struct msm_drm_private *priv = dev->dev_private; 174 struct msm_kms *kms = priv->kms; 175 struct msm_framebuffer *msm_fb = NULL; 176 struct drm_framebuffer *fb; 177 const struct msm_format *format; 178 int ret, i, n; 179 unsigned int hsub, vsub; 180 181 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)", 182 dev, mode_cmd, mode_cmd->width, mode_cmd->height, 183 (char *)&mode_cmd->pixel_format); 184 185 n = drm_format_num_planes(mode_cmd->pixel_format); 186 hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format); 187 vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format); 188 189 format = kms->funcs->get_format(kms, mode_cmd->pixel_format); 190 if (!format) { 191 dev_err(dev->dev, "unsupported pixel format: %4.4s\n", 192 (char *)&mode_cmd->pixel_format); 193 ret = -EINVAL; 194 goto fail; 195 } 196 197 msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL); 198 if (!msm_fb) { 199 ret = -ENOMEM; 200 goto fail; 201 } 202 203 fb = &msm_fb->base; 204 205 msm_fb->format = format; 206 207 if (n > ARRAY_SIZE(msm_fb->planes)) { 208 ret = -EINVAL; 209 goto fail; 210 } 211 212 for (i = 0; i < n; i++) { 213 unsigned int width = mode_cmd->width / (i ? hsub : 1); 214 unsigned int height = mode_cmd->height / (i ? vsub : 1); 215 unsigned int min_size; 216 217 min_size = (height - 1) * mode_cmd->pitches[i] 218 + width * drm_format_plane_cpp(mode_cmd->pixel_format, i) 219 + mode_cmd->offsets[i]; 220 221 if (bos[i]->size < min_size) { 222 ret = -EINVAL; 223 goto fail; 224 } 225 226 msm_fb->planes[i] = bos[i]; 227 } 228 229 drm_helper_mode_fill_fb_struct(fb, mode_cmd); 230 231 ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs); 232 if (ret) { 233 dev_err(dev->dev, "framebuffer init failed: %d\n", ret); 234 goto fail; 235 } 236 237 DBG("create: FB ID: %d (%p)", fb->base.id, fb); 238 239 return fb; 240 241 fail: 242 kfree(msm_fb); 243 244 return ERR_PTR(ret); 245 } 246