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_file.h> 10 #include <drm/drm_fourcc.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 #define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base) 23 24 static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev, 25 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos); 26 27 static const struct drm_framebuffer_funcs msm_framebuffer_funcs = { 28 .create_handle = drm_gem_fb_create_handle, 29 .destroy = drm_gem_fb_destroy, 30 .dirty = drm_atomic_helper_dirtyfb, 31 }; 32 33 #ifdef CONFIG_DEBUG_FS 34 void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m) 35 { 36 int i, n = fb->format->num_planes; 37 38 seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n", 39 fb->width, fb->height, (char *)&fb->format->format, 40 drm_framebuffer_read_refcount(fb), fb->base.id); 41 42 for (i = 0; i < n; i++) { 43 seq_printf(m, " %d: offset=%d pitch=%d, obj: ", 44 i, fb->offsets[i], fb->pitches[i]); 45 msm_gem_describe(fb->obj[i], m); 46 } 47 } 48 #endif 49 50 /* prepare/pin all the fb's bo's for scanout. Note that it is not valid 51 * to prepare an fb more multiple different initiator 'id's. But that 52 * should be fine, since only the scanout (mdpN) side of things needs 53 * this, the gpu doesn't care about fb's. 54 */ 55 int msm_framebuffer_prepare(struct drm_framebuffer *fb, 56 struct msm_gem_address_space *aspace) 57 { 58 int ret, i, n = fb->format->num_planes; 59 uint64_t iova; 60 61 for (i = 0; i < n; i++) { 62 ret = msm_gem_get_and_pin_iova(fb->obj[i], aspace, &iova); 63 DBG("FB[%u]: iova[%d]: %08llx (%d)", fb->base.id, i, iova, ret); 64 if (ret) 65 return ret; 66 } 67 68 return 0; 69 } 70 71 void msm_framebuffer_cleanup(struct drm_framebuffer *fb, 72 struct msm_gem_address_space *aspace) 73 { 74 int i, n = fb->format->num_planes; 75 76 for (i = 0; i < n; i++) 77 msm_gem_unpin_iova(fb->obj[i], aspace); 78 } 79 80 uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb, 81 struct msm_gem_address_space *aspace, int plane) 82 { 83 if (!fb->obj[plane]) 84 return 0; 85 return msm_gem_iova(fb->obj[plane], aspace) + fb->offsets[plane]; 86 } 87 88 struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane) 89 { 90 return drm_gem_fb_get_obj(fb, plane); 91 } 92 93 const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb) 94 { 95 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 96 return msm_fb->format; 97 } 98 99 struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev, 100 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd) 101 { 102 const struct drm_format_info *info = drm_get_format_info(dev, 103 mode_cmd); 104 struct drm_gem_object *bos[4] = {0}; 105 struct drm_framebuffer *fb; 106 int ret, i, n = info->num_planes; 107 108 for (i = 0; i < n; i++) { 109 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]); 110 if (!bos[i]) { 111 ret = -ENXIO; 112 goto out_unref; 113 } 114 } 115 116 fb = msm_framebuffer_init(dev, mode_cmd, bos); 117 if (IS_ERR(fb)) { 118 ret = PTR_ERR(fb); 119 goto out_unref; 120 } 121 122 return fb; 123 124 out_unref: 125 for (i = 0; i < n; i++) 126 drm_gem_object_put_unlocked(bos[i]); 127 return ERR_PTR(ret); 128 } 129 130 static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev, 131 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) 132 { 133 const struct drm_format_info *info = drm_get_format_info(dev, 134 mode_cmd); 135 struct msm_drm_private *priv = dev->dev_private; 136 struct msm_kms *kms = priv->kms; 137 struct msm_framebuffer *msm_fb = NULL; 138 struct drm_framebuffer *fb; 139 const struct msm_format *format; 140 int ret, i, n; 141 142 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)", 143 dev, mode_cmd, mode_cmd->width, mode_cmd->height, 144 (char *)&mode_cmd->pixel_format); 145 146 n = info->num_planes; 147 format = kms->funcs->get_format(kms, mode_cmd->pixel_format, 148 mode_cmd->modifier[0]); 149 if (!format) { 150 DRM_DEV_ERROR(dev->dev, "unsupported pixel format: %4.4s\n", 151 (char *)&mode_cmd->pixel_format); 152 ret = -EINVAL; 153 goto fail; 154 } 155 156 msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL); 157 if (!msm_fb) { 158 ret = -ENOMEM; 159 goto fail; 160 } 161 162 fb = &msm_fb->base; 163 164 msm_fb->format = format; 165 166 if (n > ARRAY_SIZE(fb->obj)) { 167 ret = -EINVAL; 168 goto fail; 169 } 170 171 for (i = 0; i < n; i++) { 172 unsigned int width = mode_cmd->width / (i ? info->hsub : 1); 173 unsigned int height = mode_cmd->height / (i ? info->vsub : 1); 174 unsigned int min_size; 175 176 min_size = (height - 1) * mode_cmd->pitches[i] 177 + width * info->cpp[i] 178 + mode_cmd->offsets[i]; 179 180 if (bos[i]->size < min_size) { 181 ret = -EINVAL; 182 goto fail; 183 } 184 185 msm_fb->base.obj[i] = bos[i]; 186 } 187 188 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); 189 190 ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs); 191 if (ret) { 192 DRM_DEV_ERROR(dev->dev, "framebuffer init failed: %d\n", ret); 193 goto fail; 194 } 195 196 DBG("create: FB ID: %d (%p)", fb->base.id, fb); 197 198 return fb; 199 200 fail: 201 kfree(msm_fb); 202 203 return ERR_PTR(ret); 204 } 205 206 struct drm_framebuffer * 207 msm_alloc_stolen_fb(struct drm_device *dev, int w, int h, int p, uint32_t format) 208 { 209 struct drm_mode_fb_cmd2 mode_cmd = { 210 .pixel_format = format, 211 .width = w, 212 .height = h, 213 .pitches = { p }, 214 }; 215 struct drm_gem_object *bo; 216 struct drm_framebuffer *fb; 217 int size; 218 219 /* allocate backing bo */ 220 size = mode_cmd.pitches[0] * mode_cmd.height; 221 DBG("allocating %d bytes for fb %d", size, dev->primary->index); 222 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC | MSM_BO_STOLEN); 223 if (IS_ERR(bo)) { 224 dev_warn(dev->dev, "could not allocate stolen bo\n"); 225 /* try regular bo: */ 226 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC); 227 } 228 if (IS_ERR(bo)) { 229 DRM_DEV_ERROR(dev->dev, "failed to allocate buffer object\n"); 230 return ERR_CAST(bo); 231 } 232 233 msm_gem_object_set_name(bo, "stolenfb"); 234 235 fb = msm_framebuffer_init(dev, &mode_cmd, &bo); 236 if (IS_ERR(fb)) { 237 DRM_DEV_ERROR(dev->dev, "failed to allocate fb\n"); 238 /* note: if fb creation failed, we can't rely on fb destroy 239 * to unref the bo: 240 */ 241 drm_gem_object_put_unlocked(bo); 242 return ERR_CAST(fb); 243 } 244 245 return fb; 246 } 247