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 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 = drm_format_num_planes(fb->pixel_format); 69 70 seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n", 71 fb->width, fb->height, (char *)&fb->pixel_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, int id) 88 { 89 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 90 int ret, i, n = drm_format_num_planes(fb->pixel_format); 91 uint32_t iova; 92 93 for (i = 0; i < n; i++) { 94 ret = msm_gem_get_iova(msm_fb->planes[i], id, &iova); 95 DBG("FB[%u]: iova[%d]: %08x (%d)", fb->base.id, i, iova, ret); 96 if (ret) 97 return ret; 98 } 99 100 return 0; 101 } 102 103 void msm_framebuffer_cleanup(struct drm_framebuffer *fb, int id) 104 { 105 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 106 int i, n = drm_format_num_planes(fb->pixel_format); 107 108 for (i = 0; i < n; i++) 109 msm_gem_put_iova(msm_fb->planes[i], id); 110 } 111 112 uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb, int id, int plane) 113 { 114 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 115 if (!msm_fb->planes[plane]) 116 return 0; 117 return msm_gem_iova(msm_fb->planes[plane], id) + fb->offsets[plane]; 118 } 119 120 struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane) 121 { 122 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 123 return msm_fb->planes[plane]; 124 } 125 126 const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb) 127 { 128 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 129 return msm_fb->format; 130 } 131 132 struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev, 133 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd) 134 { 135 struct drm_gem_object *bos[4] = {0}; 136 struct drm_framebuffer *fb; 137 int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format); 138 139 for (i = 0; i < n; i++) { 140 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]); 141 if (!bos[i]) { 142 ret = -ENXIO; 143 goto out_unref; 144 } 145 } 146 147 fb = msm_framebuffer_init(dev, mode_cmd, bos); 148 if (IS_ERR(fb)) { 149 ret = PTR_ERR(fb); 150 goto out_unref; 151 } 152 153 return fb; 154 155 out_unref: 156 for (i = 0; i < n; i++) 157 drm_gem_object_unreference_unlocked(bos[i]); 158 return ERR_PTR(ret); 159 } 160 161 struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev, 162 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) 163 { 164 struct msm_drm_private *priv = dev->dev_private; 165 struct msm_kms *kms = priv->kms; 166 struct msm_framebuffer *msm_fb = NULL; 167 struct drm_framebuffer *fb; 168 const struct msm_format *format; 169 int ret, i, n; 170 unsigned int hsub, vsub; 171 172 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)", 173 dev, mode_cmd, mode_cmd->width, mode_cmd->height, 174 (char *)&mode_cmd->pixel_format); 175 176 n = drm_format_num_planes(mode_cmd->pixel_format); 177 hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format); 178 vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format); 179 180 format = kms->funcs->get_format(kms, mode_cmd->pixel_format); 181 if (!format) { 182 dev_err(dev->dev, "unsupported pixel format: %4.4s\n", 183 (char *)&mode_cmd->pixel_format); 184 ret = -EINVAL; 185 goto fail; 186 } 187 188 msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL); 189 if (!msm_fb) { 190 ret = -ENOMEM; 191 goto fail; 192 } 193 194 fb = &msm_fb->base; 195 196 msm_fb->format = format; 197 198 if (n > ARRAY_SIZE(msm_fb->planes)) { 199 ret = -EINVAL; 200 goto fail; 201 } 202 203 for (i = 0; i < n; i++) { 204 unsigned int width = mode_cmd->width / (i ? hsub : 1); 205 unsigned int height = mode_cmd->height / (i ? vsub : 1); 206 unsigned int min_size; 207 208 min_size = (height - 1) * mode_cmd->pitches[i] 209 + width * drm_format_plane_cpp(mode_cmd->pixel_format, i) 210 + mode_cmd->offsets[i]; 211 212 if (bos[i]->size < min_size) { 213 ret = -EINVAL; 214 goto fail; 215 } 216 217 msm_fb->planes[i] = bos[i]; 218 } 219 220 drm_helper_mode_fill_fb_struct(fb, mode_cmd); 221 222 ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs); 223 if (ret) { 224 dev_err(dev->dev, "framebuffer init failed: %d\n", ret); 225 goto fail; 226 } 227 228 DBG("create: FB ID: %d (%p)", fb->base.id, fb); 229 230 return fb; 231 232 fail: 233 kfree(msm_fb); 234 235 return ERR_PTR(ret); 236 } 237