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_gem_framebuffer_helper.h> 9 #include <drm/drm_probe_helper.h> 10 11 #include "msm_drv.h" 12 #include "msm_kms.h" 13 #include "msm_gem.h" 14 15 struct msm_framebuffer { 16 struct drm_framebuffer base; 17 const struct msm_format *format; 18 }; 19 #define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base) 20 21 static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev, 22 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos); 23 24 static const struct drm_framebuffer_funcs msm_framebuffer_funcs = { 25 .create_handle = drm_gem_fb_create_handle, 26 .destroy = drm_gem_fb_destroy, 27 }; 28 29 #ifdef CONFIG_DEBUG_FS 30 void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m) 31 { 32 int i, n = fb->format->num_planes; 33 34 seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n", 35 fb->width, fb->height, (char *)&fb->format->format, 36 drm_framebuffer_read_refcount(fb), fb->base.id); 37 38 for (i = 0; i < n; i++) { 39 seq_printf(m, " %d: offset=%d pitch=%d, obj: ", 40 i, fb->offsets[i], fb->pitches[i]); 41 msm_gem_describe(fb->obj[i], m); 42 } 43 } 44 #endif 45 46 /* prepare/pin all the fb's bo's for scanout. Note that it is not valid 47 * to prepare an fb more multiple different initiator 'id's. But that 48 * should be fine, since only the scanout (mdpN) side of things needs 49 * this, the gpu doesn't care about fb's. 50 */ 51 int msm_framebuffer_prepare(struct drm_framebuffer *fb, 52 struct msm_gem_address_space *aspace) 53 { 54 int ret, i, n = fb->format->num_planes; 55 uint64_t iova; 56 57 for (i = 0; i < n; i++) { 58 ret = msm_gem_get_and_pin_iova(fb->obj[i], aspace, &iova); 59 DBG("FB[%u]: iova[%d]: %08llx (%d)", fb->base.id, i, iova, ret); 60 if (ret) 61 return ret; 62 } 63 64 return 0; 65 } 66 67 void msm_framebuffer_cleanup(struct drm_framebuffer *fb, 68 struct msm_gem_address_space *aspace) 69 { 70 int i, n = fb->format->num_planes; 71 72 for (i = 0; i < n; i++) 73 msm_gem_unpin_iova(fb->obj[i], aspace); 74 } 75 76 uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb, 77 struct msm_gem_address_space *aspace, int plane) 78 { 79 if (!fb->obj[plane]) 80 return 0; 81 return msm_gem_iova(fb->obj[plane], aspace) + fb->offsets[plane]; 82 } 83 84 struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane) 85 { 86 return drm_gem_fb_get_obj(fb, plane); 87 } 88 89 const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb) 90 { 91 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 92 return msm_fb->format; 93 } 94 95 struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev, 96 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd) 97 { 98 struct drm_gem_object *bos[4] = {0}; 99 struct drm_framebuffer *fb; 100 int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format); 101 102 for (i = 0; i < n; i++) { 103 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]); 104 if (!bos[i]) { 105 ret = -ENXIO; 106 goto out_unref; 107 } 108 } 109 110 fb = msm_framebuffer_init(dev, mode_cmd, bos); 111 if (IS_ERR(fb)) { 112 ret = PTR_ERR(fb); 113 goto out_unref; 114 } 115 116 return fb; 117 118 out_unref: 119 for (i = 0; i < n; i++) 120 drm_gem_object_put_unlocked(bos[i]); 121 return ERR_PTR(ret); 122 } 123 124 static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev, 125 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) 126 { 127 struct msm_drm_private *priv = dev->dev_private; 128 struct msm_kms *kms = priv->kms; 129 struct msm_framebuffer *msm_fb = NULL; 130 struct drm_framebuffer *fb; 131 const struct msm_format *format; 132 int ret, i, n; 133 unsigned int hsub, vsub; 134 135 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)", 136 dev, mode_cmd, mode_cmd->width, mode_cmd->height, 137 (char *)&mode_cmd->pixel_format); 138 139 n = drm_format_num_planes(mode_cmd->pixel_format); 140 hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format); 141 vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format); 142 143 format = kms->funcs->get_format(kms, mode_cmd->pixel_format, 144 mode_cmd->modifier[0]); 145 if (!format) { 146 DRM_DEV_ERROR(dev->dev, "unsupported pixel format: %4.4s\n", 147 (char *)&mode_cmd->pixel_format); 148 ret = -EINVAL; 149 goto fail; 150 } 151 152 msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL); 153 if (!msm_fb) { 154 ret = -ENOMEM; 155 goto fail; 156 } 157 158 fb = &msm_fb->base; 159 160 msm_fb->format = format; 161 162 if (n > ARRAY_SIZE(fb->obj)) { 163 ret = -EINVAL; 164 goto fail; 165 } 166 167 for (i = 0; i < n; i++) { 168 unsigned int width = mode_cmd->width / (i ? hsub : 1); 169 unsigned int height = mode_cmd->height / (i ? vsub : 1); 170 unsigned int min_size; 171 172 min_size = (height - 1) * mode_cmd->pitches[i] 173 + width * drm_format_plane_cpp(mode_cmd->pixel_format, i) 174 + mode_cmd->offsets[i]; 175 176 if (bos[i]->size < min_size) { 177 ret = -EINVAL; 178 goto fail; 179 } 180 181 msm_fb->base.obj[i] = bos[i]; 182 } 183 184 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); 185 186 ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs); 187 if (ret) { 188 DRM_DEV_ERROR(dev->dev, "framebuffer init failed: %d\n", ret); 189 goto fail; 190 } 191 192 DBG("create: FB ID: %d (%p)", fb->base.id, fb); 193 194 return fb; 195 196 fail: 197 kfree(msm_fb); 198 199 return ERR_PTR(ret); 200 } 201 202 struct drm_framebuffer * 203 msm_alloc_stolen_fb(struct drm_device *dev, int w, int h, int p, uint32_t format) 204 { 205 struct drm_mode_fb_cmd2 mode_cmd = { 206 .pixel_format = format, 207 .width = w, 208 .height = h, 209 .pitches = { p }, 210 }; 211 struct drm_gem_object *bo; 212 struct drm_framebuffer *fb; 213 int size; 214 215 /* allocate backing bo */ 216 size = mode_cmd.pitches[0] * mode_cmd.height; 217 DBG("allocating %d bytes for fb %d", size, dev->primary->index); 218 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC | MSM_BO_STOLEN); 219 if (IS_ERR(bo)) { 220 dev_warn(dev->dev, "could not allocate stolen bo\n"); 221 /* try regular bo: */ 222 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC); 223 } 224 if (IS_ERR(bo)) { 225 DRM_DEV_ERROR(dev->dev, "failed to allocate buffer object\n"); 226 return ERR_CAST(bo); 227 } 228 229 msm_gem_object_set_name(bo, "stolenfb"); 230 231 fb = msm_framebuffer_init(dev, &mode_cmd, &bo); 232 if (IS_ERR(fb)) { 233 DRM_DEV_ERROR(dev->dev, "failed to allocate fb\n"); 234 /* note: if fb creation failed, we can't rely on fb destroy 235 * to unref the bo: 236 */ 237 drm_gem_object_put_unlocked(bo); 238 return ERR_CAST(fb); 239 } 240 241 return fb; 242 } 243