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