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