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 <drm/drm_crtc.h> 19 #include <drm/drm_damage_helper.h> 20 #include <drm/drm_gem_framebuffer_helper.h> 21 #include <drm/drm_probe_helper.h> 22 23 #include "msm_drv.h" 24 #include "msm_kms.h" 25 #include "msm_gem.h" 26 27 struct msm_framebuffer { 28 struct drm_framebuffer base; 29 const struct msm_format *format; 30 }; 31 #define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base) 32 33 static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev, 34 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos); 35 36 static const struct drm_framebuffer_funcs msm_framebuffer_funcs = { 37 .create_handle = drm_gem_fb_create_handle, 38 .destroy = drm_gem_fb_destroy, 39 .dirty = drm_atomic_helper_dirtyfb, 40 }; 41 42 #ifdef CONFIG_DEBUG_FS 43 void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m) 44 { 45 int i, n = fb->format->num_planes; 46 47 seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n", 48 fb->width, fb->height, (char *)&fb->format->format, 49 drm_framebuffer_read_refcount(fb), fb->base.id); 50 51 for (i = 0; i < n; i++) { 52 seq_printf(m, " %d: offset=%d pitch=%d, obj: ", 53 i, fb->offsets[i], fb->pitches[i]); 54 msm_gem_describe(fb->obj[i], m); 55 } 56 } 57 #endif 58 59 /* prepare/pin all the fb's bo's for scanout. Note that it is not valid 60 * to prepare an fb more multiple different initiator 'id's. But that 61 * should be fine, since only the scanout (mdpN) side of things needs 62 * this, the gpu doesn't care about fb's. 63 */ 64 int msm_framebuffer_prepare(struct drm_framebuffer *fb, 65 struct msm_gem_address_space *aspace) 66 { 67 int ret, i, n = fb->format->num_planes; 68 uint64_t iova; 69 70 for (i = 0; i < n; i++) { 71 ret = msm_gem_get_and_pin_iova(fb->obj[i], aspace, &iova); 72 DBG("FB[%u]: iova[%d]: %08llx (%d)", fb->base.id, i, iova, ret); 73 if (ret) 74 return ret; 75 } 76 77 return 0; 78 } 79 80 void msm_framebuffer_cleanup(struct drm_framebuffer *fb, 81 struct msm_gem_address_space *aspace) 82 { 83 int i, n = fb->format->num_planes; 84 85 for (i = 0; i < n; i++) 86 msm_gem_unpin_iova(fb->obj[i], aspace); 87 } 88 89 uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb, 90 struct msm_gem_address_space *aspace, int plane) 91 { 92 if (!fb->obj[plane]) 93 return 0; 94 return msm_gem_iova(fb->obj[plane], aspace) + fb->offsets[plane]; 95 } 96 97 struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane) 98 { 99 return drm_gem_fb_get_obj(fb, plane); 100 } 101 102 const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb) 103 { 104 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 105 return msm_fb->format; 106 } 107 108 struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev, 109 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd) 110 { 111 const struct drm_format_info *info = drm_get_format_info(dev, 112 mode_cmd); 113 struct drm_gem_object *bos[4] = {0}; 114 struct drm_framebuffer *fb; 115 int ret, i, n = info->num_planes; 116 117 for (i = 0; i < n; i++) { 118 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]); 119 if (!bos[i]) { 120 ret = -ENXIO; 121 goto out_unref; 122 } 123 } 124 125 fb = msm_framebuffer_init(dev, mode_cmd, bos); 126 if (IS_ERR(fb)) { 127 ret = PTR_ERR(fb); 128 goto out_unref; 129 } 130 131 return fb; 132 133 out_unref: 134 for (i = 0; i < n; i++) 135 drm_gem_object_put_unlocked(bos[i]); 136 return ERR_PTR(ret); 137 } 138 139 static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev, 140 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) 141 { 142 const struct drm_format_info *info = drm_get_format_info(dev, 143 mode_cmd); 144 struct msm_drm_private *priv = dev->dev_private; 145 struct msm_kms *kms = priv->kms; 146 struct msm_framebuffer *msm_fb = NULL; 147 struct drm_framebuffer *fb; 148 const struct msm_format *format; 149 int ret, i, n; 150 151 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)", 152 dev, mode_cmd, mode_cmd->width, mode_cmd->height, 153 (char *)&mode_cmd->pixel_format); 154 155 n = info->num_planes; 156 format = kms->funcs->get_format(kms, mode_cmd->pixel_format, 157 mode_cmd->modifier[0]); 158 if (!format) { 159 DRM_DEV_ERROR(dev->dev, "unsupported pixel format: %4.4s\n", 160 (char *)&mode_cmd->pixel_format); 161 ret = -EINVAL; 162 goto fail; 163 } 164 165 msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL); 166 if (!msm_fb) { 167 ret = -ENOMEM; 168 goto fail; 169 } 170 171 fb = &msm_fb->base; 172 173 msm_fb->format = format; 174 175 if (n > ARRAY_SIZE(fb->obj)) { 176 ret = -EINVAL; 177 goto fail; 178 } 179 180 for (i = 0; i < n; i++) { 181 unsigned int width = mode_cmd->width / (i ? info->hsub : 1); 182 unsigned int height = mode_cmd->height / (i ? info->vsub : 1); 183 unsigned int min_size; 184 185 min_size = (height - 1) * mode_cmd->pitches[i] 186 + width * info->cpp[i] 187 + mode_cmd->offsets[i]; 188 189 if (bos[i]->size < min_size) { 190 ret = -EINVAL; 191 goto fail; 192 } 193 194 msm_fb->base.obj[i] = bos[i]; 195 } 196 197 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); 198 199 ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs); 200 if (ret) { 201 DRM_DEV_ERROR(dev->dev, "framebuffer init failed: %d\n", ret); 202 goto fail; 203 } 204 205 DBG("create: FB ID: %d (%p)", fb->base.id, fb); 206 207 return fb; 208 209 fail: 210 kfree(msm_fb); 211 212 return ERR_PTR(ret); 213 } 214 215 struct drm_framebuffer * 216 msm_alloc_stolen_fb(struct drm_device *dev, int w, int h, int p, uint32_t format) 217 { 218 struct drm_mode_fb_cmd2 mode_cmd = { 219 .pixel_format = format, 220 .width = w, 221 .height = h, 222 .pitches = { p }, 223 }; 224 struct drm_gem_object *bo; 225 struct drm_framebuffer *fb; 226 int size; 227 228 /* allocate backing bo */ 229 size = mode_cmd.pitches[0] * mode_cmd.height; 230 DBG("allocating %d bytes for fb %d", size, dev->primary->index); 231 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC | MSM_BO_STOLEN); 232 if (IS_ERR(bo)) { 233 dev_warn(dev->dev, "could not allocate stolen bo\n"); 234 /* try regular bo: */ 235 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC); 236 } 237 if (IS_ERR(bo)) { 238 DRM_DEV_ERROR(dev->dev, "failed to allocate buffer object\n"); 239 return ERR_CAST(bo); 240 } 241 242 msm_gem_object_set_name(bo, "stolenfb"); 243 244 fb = msm_framebuffer_init(dev, &mode_cmd, &bo); 245 if (IS_ERR(fb)) { 246 DRM_DEV_ERROR(dev->dev, "failed to allocate fb\n"); 247 /* note: if fb creation failed, we can't rely on fb destroy 248 * to unref the bo: 249 */ 250 drm_gem_object_put_unlocked(bo); 251 return ERR_CAST(fb); 252 } 253 254 return fb; 255 } 256