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_crtc_helper.h> 20 21 #include "msm_drv.h" 22 #include "msm_kms.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 = fb->format->num_planes; 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 53 drm_gem_object_unreference_unlocked(bo); 54 } 55 56 kfree(msm_fb); 57 } 58 59 static const struct drm_framebuffer_funcs msm_framebuffer_funcs = { 60 .create_handle = msm_framebuffer_create_handle, 61 .destroy = msm_framebuffer_destroy, 62 }; 63 64 #ifdef CONFIG_DEBUG_FS 65 void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m) 66 { 67 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 68 int i, n = fb->format->num_planes; 69 70 seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n", 71 fb->width, fb->height, (char *)&fb->format->format, 72 drm_framebuffer_read_refcount(fb), fb->base.id); 73 74 for (i = 0; i < n; i++) { 75 seq_printf(m, " %d: offset=%d pitch=%d, obj: ", 76 i, fb->offsets[i], fb->pitches[i]); 77 msm_gem_describe(msm_fb->planes[i], m); 78 } 79 } 80 #endif 81 82 /* prepare/pin all the fb's bo's for scanout. Note that it is not valid 83 * to prepare an fb more multiple different initiator 'id's. But that 84 * should be fine, since only the scanout (mdpN) side of things needs 85 * this, the gpu doesn't care about fb's. 86 */ 87 int msm_framebuffer_prepare(struct drm_framebuffer *fb, 88 struct msm_gem_address_space *aspace) 89 { 90 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 91 int ret, i, n = fb->format->num_planes; 92 uint64_t iova; 93 94 for (i = 0; i < n; i++) { 95 ret = msm_gem_get_iova(msm_fb->planes[i], aspace, &iova); 96 DBG("FB[%u]: iova[%d]: %08llx (%d)", fb->base.id, i, iova, ret); 97 if (ret) 98 return ret; 99 } 100 101 return 0; 102 } 103 104 void msm_framebuffer_cleanup(struct drm_framebuffer *fb, 105 struct msm_gem_address_space *aspace) 106 { 107 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 108 int i, n = fb->format->num_planes; 109 110 for (i = 0; i < n; i++) 111 msm_gem_put_iova(msm_fb->planes[i], aspace); 112 } 113 114 uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb, 115 struct msm_gem_address_space *aspace, int plane) 116 { 117 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 118 if (!msm_fb->planes[plane]) 119 return 0; 120 return msm_gem_iova(msm_fb->planes[plane], aspace) + fb->offsets[plane]; 121 } 122 123 struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane) 124 { 125 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 126 return msm_fb->planes[plane]; 127 } 128 129 const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb) 130 { 131 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 132 return msm_fb->format; 133 } 134 135 struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev, 136 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd) 137 { 138 struct drm_gem_object *bos[4] = {0}; 139 struct drm_framebuffer *fb; 140 int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format); 141 142 for (i = 0; i < n; i++) { 143 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]); 144 if (!bos[i]) { 145 ret = -ENXIO; 146 goto out_unref; 147 } 148 } 149 150 fb = msm_framebuffer_init(dev, mode_cmd, bos); 151 if (IS_ERR(fb)) { 152 ret = PTR_ERR(fb); 153 goto out_unref; 154 } 155 156 return fb; 157 158 out_unref: 159 for (i = 0; i < n; i++) 160 drm_gem_object_unreference_unlocked(bos[i]); 161 return ERR_PTR(ret); 162 } 163 164 struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev, 165 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) 166 { 167 struct msm_drm_private *priv = dev->dev_private; 168 struct msm_kms *kms = priv->kms; 169 struct msm_framebuffer *msm_fb = NULL; 170 struct drm_framebuffer *fb; 171 const struct msm_format *format; 172 int ret, i, n; 173 unsigned int hsub, vsub; 174 175 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)", 176 dev, mode_cmd, mode_cmd->width, mode_cmd->height, 177 (char *)&mode_cmd->pixel_format); 178 179 n = drm_format_num_planes(mode_cmd->pixel_format); 180 hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format); 181 vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format); 182 183 format = kms->funcs->get_format(kms, mode_cmd->pixel_format); 184 if (!format) { 185 dev_err(dev->dev, "unsupported pixel format: %4.4s\n", 186 (char *)&mode_cmd->pixel_format); 187 ret = -EINVAL; 188 goto fail; 189 } 190 191 msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL); 192 if (!msm_fb) { 193 ret = -ENOMEM; 194 goto fail; 195 } 196 197 fb = &msm_fb->base; 198 199 msm_fb->format = format; 200 201 if (n > ARRAY_SIZE(msm_fb->planes)) { 202 ret = -EINVAL; 203 goto fail; 204 } 205 206 for (i = 0; i < n; i++) { 207 unsigned int width = mode_cmd->width / (i ? hsub : 1); 208 unsigned int height = mode_cmd->height / (i ? vsub : 1); 209 unsigned int min_size; 210 211 min_size = (height - 1) * mode_cmd->pitches[i] 212 + width * drm_format_plane_cpp(mode_cmd->pixel_format, i) 213 + mode_cmd->offsets[i]; 214 215 if (bos[i]->size < min_size) { 216 ret = -EINVAL; 217 goto fail; 218 } 219 220 msm_fb->planes[i] = bos[i]; 221 } 222 223 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); 224 225 ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs); 226 if (ret) { 227 dev_err(dev->dev, "framebuffer init failed: %d\n", ret); 228 goto fail; 229 } 230 231 DBG("create: FB ID: %d (%p)", fb->base.id, fb); 232 233 return fb; 234 235 fail: 236 kfree(msm_fb); 237 238 return ERR_PTR(ret); 239 } 240