1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2013 Red Hat 4 * Author: Rob Clark <robdclark@gmail.com> 5 */ 6 7 #include <drm/drm_crtc.h> 8 #include <drm/drm_damage_helper.h> 9 #include <drm/drm_fourcc.h> 10 #include <drm/drm_framebuffer.h> 11 #include <drm/drm_gem_framebuffer_helper.h> 12 #include <drm/drm_probe_helper.h> 13 14 #include "msm_drv.h" 15 #include "msm_kms.h" 16 #include "msm_gem.h" 17 18 struct msm_framebuffer { 19 struct drm_framebuffer base; 20 const struct msm_format *format; 21 22 /* Count of # of attached planes which need dirtyfb: */ 23 refcount_t dirtyfb; 24 25 /* Framebuffer per-plane address, if pinned, else zero: */ 26 uint64_t iova[DRM_FORMAT_MAX_PLANES]; 27 atomic_t prepare_count; 28 }; 29 #define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base) 30 31 static int msm_framebuffer_dirtyfb(struct drm_framebuffer *fb, 32 struct drm_file *file_priv, unsigned int flags, 33 unsigned int color, struct drm_clip_rect *clips, 34 unsigned int num_clips) 35 { 36 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 37 38 /* If this fb is not used on any display requiring pixel data to be 39 * flushed, then skip dirtyfb 40 */ 41 if (refcount_read(&msm_fb->dirtyfb) == 1) 42 return 0; 43 44 return drm_atomic_helper_dirtyfb(fb, file_priv, flags, color, 45 clips, num_clips); 46 } 47 48 static const struct drm_framebuffer_funcs msm_framebuffer_funcs = { 49 .create_handle = drm_gem_fb_create_handle, 50 .destroy = drm_gem_fb_destroy, 51 .dirty = msm_framebuffer_dirtyfb, 52 }; 53 54 #ifdef CONFIG_DEBUG_FS 55 void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m) 56 { 57 struct msm_gem_stats stats = {}; 58 int i, n = fb->format->num_planes; 59 60 seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n", 61 fb->width, fb->height, (char *)&fb->format->format, 62 drm_framebuffer_read_refcount(fb), fb->base.id); 63 64 for (i = 0; i < n; i++) { 65 seq_printf(m, " %d: offset=%d pitch=%d, obj: ", 66 i, fb->offsets[i], fb->pitches[i]); 67 msm_gem_describe(fb->obj[i], m, &stats); 68 } 69 } 70 #endif 71 72 /* prepare/pin all the fb's bo's for scanout. 73 */ 74 int msm_framebuffer_prepare(struct drm_framebuffer *fb, bool needs_dirtyfb) 75 { 76 struct msm_drm_private *priv = fb->dev->dev_private; 77 struct drm_gpuvm *vm = priv->kms->vm; 78 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 79 int ret, i, n = fb->format->num_planes; 80 81 if (needs_dirtyfb) 82 refcount_inc(&msm_fb->dirtyfb); 83 84 if (atomic_inc_return(&msm_fb->prepare_count) > 1) 85 return 0; 86 87 for (i = 0; i < n; i++) { 88 msm_gem_vma_get(fb->obj[i]); 89 ret = msm_gem_get_and_pin_iova(fb->obj[i], vm, &msm_fb->iova[i]); 90 drm_dbg_state(fb->dev, "FB[%u]: iova[%d]: %08llx (%d)\n", 91 fb->base.id, i, msm_fb->iova[i], ret); 92 if (ret) 93 return ret; 94 } 95 96 return 0; 97 } 98 99 void msm_framebuffer_cleanup(struct drm_framebuffer *fb, bool needed_dirtyfb) 100 { 101 struct msm_drm_private *priv = fb->dev->dev_private; 102 struct drm_gpuvm *vm = priv->kms->vm; 103 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 104 int i, n = fb->format->num_planes; 105 106 if (needed_dirtyfb) 107 refcount_dec(&msm_fb->dirtyfb); 108 109 if (atomic_dec_return(&msm_fb->prepare_count)) 110 return; 111 112 memset(msm_fb->iova, 0, sizeof(msm_fb->iova)); 113 114 for (i = 0; i < n; i++) { 115 msm_gem_unpin_iova(fb->obj[i], vm); 116 msm_gem_vma_put(fb->obj[i]); 117 } 118 } 119 120 uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb, int plane) 121 { 122 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 123 return msm_fb->iova[plane] + fb->offsets[plane]; 124 } 125 126 struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane) 127 { 128 return drm_gem_fb_get_obj(fb, plane); 129 } 130 131 const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb) 132 { 133 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 134 return msm_fb->format; 135 } 136 137 static struct drm_framebuffer * 138 msm_framebuffer_init(struct drm_device *dev, const struct drm_format_info *info, 139 const struct drm_mode_fb_cmd2 *mode_cmd, 140 struct drm_gem_object **bos) 141 { 142 struct msm_drm_private *priv = dev->dev_private; 143 struct msm_kms *kms = priv->kms; 144 struct msm_framebuffer *msm_fb = NULL; 145 struct drm_framebuffer *fb; 146 const struct msm_format *format; 147 int ret, i, n; 148 149 drm_dbg_state(dev, "create framebuffer: mode_cmd=%p (%dx%d@%p4cc)\n", 150 mode_cmd, mode_cmd->width, mode_cmd->height, 151 &mode_cmd->pixel_format); 152 153 n = info->num_planes; 154 format = mdp_get_format(kms, mode_cmd->pixel_format, 155 mode_cmd->modifier[0]); 156 if (!format) { 157 DRM_DEV_ERROR(dev->dev, "unsupported pixel format: %p4cc\n", 158 &mode_cmd->pixel_format); 159 ret = -EINVAL; 160 goto fail; 161 } 162 163 msm_fb = kzalloc_obj(*msm_fb); 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 ? info->hsub : 1); 180 unsigned int height = mode_cmd->height / (i ? info->vsub : 1); 181 unsigned int min_size; 182 183 min_size = (height - 1) * mode_cmd->pitches[i] 184 + width * info->cpp[i] 185 + mode_cmd->offsets[i]; 186 187 if (bos[i]->size < min_size) { 188 ret = UERR(EINVAL, dev, "plane %d too small", i); 189 goto fail; 190 } 191 192 if (to_msm_bo(bos[i])->flags & MSM_BO_NO_SHARE) { 193 ret = UERR(EINVAL, dev, "Cannot map _NO_SHARE to kms vm"); 194 goto fail; 195 } 196 197 msm_fb->base.obj[i] = bos[i]; 198 } 199 200 drm_helper_mode_fill_fb_struct(dev, fb, info, mode_cmd); 201 202 ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs); 203 if (ret) { 204 DRM_DEV_ERROR(dev->dev, "framebuffer init failed: %d\n", ret); 205 goto fail; 206 } 207 208 refcount_set(&msm_fb->dirtyfb, 1); 209 210 drm_dbg_state(dev, "create: FB ID: %d (%p)\n", fb->base.id, fb); 211 212 return fb; 213 214 fail: 215 kfree(msm_fb); 216 217 return ERR_PTR(ret); 218 } 219 220 struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev, 221 struct drm_file *file, 222 const struct drm_format_info *info, 223 const struct drm_mode_fb_cmd2 *mode_cmd) 224 { 225 struct drm_gem_object *bos[4] = {0}; 226 struct drm_framebuffer *fb; 227 int ret, i, n = info->num_planes; 228 229 for (i = 0; i < n; i++) { 230 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]); 231 if (!bos[i]) { 232 ret = -ENXIO; 233 goto out_unref; 234 } 235 } 236 237 fb = msm_framebuffer_init(dev, info, mode_cmd, bos); 238 if (IS_ERR(fb)) { 239 ret = PTR_ERR(fb); 240 goto out_unref; 241 } 242 243 return fb; 244 245 out_unref: 246 for (i = 0; i < n; i++) 247 drm_gem_object_put(bos[i]); 248 return ERR_PTR(ret); 249 } 250