1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2021 Microsoft 4 */ 5 6 #include <linux/hyperv.h> 7 8 #include <drm/drm_atomic.h> 9 #include <drm/drm_crtc_helper.h> 10 #include <drm/drm_damage_helper.h> 11 #include <drm/drm_drv.h> 12 #include <drm/drm_edid.h> 13 #include <drm/drm_format_helper.h> 14 #include <drm/drm_fourcc.h> 15 #include <drm/drm_framebuffer.h> 16 #include <drm/drm_gem_atomic_helper.h> 17 #include <drm/drm_gem_framebuffer_helper.h> 18 #include <drm/drm_gem_shmem_helper.h> 19 #include <drm/drm_probe_helper.h> 20 #include <drm/drm_panic.h> 21 #include <drm/drm_plane.h> 22 #include <drm/drm_vblank.h> 23 #include <drm/drm_vblank_helper.h> 24 25 #include "hyperv_drm.h" 26 27 static int hyperv_blit_to_vram_rect(struct drm_framebuffer *fb, 28 const struct iosys_map *vmap, 29 struct drm_rect *rect) 30 { 31 struct hyperv_drm_device *hv = to_hv(fb->dev); 32 struct iosys_map dst = IOSYS_MAP_INIT_VADDR_IOMEM(hv->vram); 33 int idx; 34 35 if (!drm_dev_enter(&hv->dev, &idx)) 36 return -ENODEV; 37 38 iosys_map_incr(&dst, drm_fb_clip_offset(fb->pitches[0], fb->format, rect)); 39 drm_fb_memcpy(&dst, fb->pitches, vmap, fb, rect); 40 41 drm_dev_exit(idx); 42 43 return 0; 44 } 45 46 static int hyperv_connector_get_modes(struct drm_connector *connector) 47 { 48 struct hyperv_drm_device *hv = to_hv(connector->dev); 49 int count; 50 51 count = drm_add_modes_noedid(connector, 52 connector->dev->mode_config.max_width, 53 connector->dev->mode_config.max_height); 54 drm_set_preferred_mode(connector, hv->preferred_width, 55 hv->preferred_height); 56 57 return count; 58 } 59 60 static const struct drm_connector_helper_funcs hyperv_connector_helper_funcs = { 61 .get_modes = hyperv_connector_get_modes, 62 }; 63 64 static const struct drm_connector_funcs hyperv_connector_funcs = { 65 .fill_modes = drm_helper_probe_single_connector_modes, 66 .destroy = drm_connector_cleanup, 67 .reset = drm_atomic_helper_connector_reset, 68 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 69 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 70 }; 71 72 static inline int hyperv_conn_init(struct hyperv_drm_device *hv) 73 { 74 drm_connector_helper_add(&hv->connector, &hyperv_connector_helper_funcs); 75 return drm_connector_init(&hv->dev, &hv->connector, 76 &hyperv_connector_funcs, 77 DRM_MODE_CONNECTOR_VIRTUAL); 78 } 79 80 static int hyperv_check_size(struct hyperv_drm_device *hv, int w, int h, 81 struct drm_framebuffer *fb) 82 { 83 u32 pitch = w * (hv->screen_depth / 8); 84 85 if (fb) 86 pitch = fb->pitches[0]; 87 88 if (pitch * h > hv->fb_size) 89 return -EINVAL; 90 91 return 0; 92 } 93 94 static const uint32_t hyperv_formats[] = { 95 DRM_FORMAT_XRGB8888, 96 }; 97 98 static const uint64_t hyperv_modifiers[] = { 99 DRM_FORMAT_MOD_LINEAR, 100 DRM_FORMAT_MOD_INVALID 101 }; 102 103 static void hyperv_crtc_helper_atomic_enable(struct drm_crtc *crtc, 104 struct drm_atomic_state *state) 105 { 106 struct hyperv_drm_device *hv = to_hv(crtc->dev); 107 struct drm_plane *plane = &hv->plane; 108 struct drm_plane_state *plane_state = plane->state; 109 struct drm_crtc_state *crtc_state = crtc->state; 110 111 hyperv_hide_hw_ptr(hv->hdev); 112 hyperv_update_situation(hv->hdev, 1, hv->screen_depth, 113 crtc_state->mode.hdisplay, 114 crtc_state->mode.vdisplay, 115 plane_state->fb->pitches[0]); 116 117 drm_crtc_vblank_on(crtc); 118 } 119 120 static const struct drm_crtc_helper_funcs hyperv_crtc_helper_funcs = { 121 .atomic_check = drm_crtc_helper_atomic_check, 122 .atomic_flush = drm_crtc_vblank_atomic_flush, 123 .atomic_enable = hyperv_crtc_helper_atomic_enable, 124 .atomic_disable = drm_crtc_vblank_atomic_disable, 125 }; 126 127 static const struct drm_crtc_funcs hyperv_crtc_funcs = { 128 .reset = drm_atomic_helper_crtc_reset, 129 .destroy = drm_crtc_cleanup, 130 .set_config = drm_atomic_helper_set_config, 131 .page_flip = drm_atomic_helper_page_flip, 132 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 133 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 134 DRM_CRTC_VBLANK_TIMER_FUNCS, 135 }; 136 137 static int hyperv_plane_atomic_check(struct drm_plane *plane, 138 struct drm_atomic_state *state) 139 { 140 struct drm_plane_state *plane_state = drm_atomic_get_new_plane_state(state, plane); 141 struct hyperv_drm_device *hv = to_hv(plane->dev); 142 struct drm_framebuffer *fb = plane_state->fb; 143 struct drm_crtc *crtc = plane_state->crtc; 144 struct drm_crtc_state *crtc_state = NULL; 145 int ret; 146 147 if (crtc) 148 crtc_state = drm_atomic_get_new_crtc_state(state, crtc); 149 150 ret = drm_atomic_helper_check_plane_state(plane_state, crtc_state, 151 DRM_PLANE_NO_SCALING, 152 DRM_PLANE_NO_SCALING, 153 false, false); 154 if (ret) 155 return ret; 156 157 if (!plane_state->visible) 158 return 0; 159 160 if (fb->pitches[0] * fb->height > hv->fb_size) { 161 drm_err(&hv->dev, "fb size requested by %s for %dX%d (pitch %d) greater than %ld\n", 162 current->comm, fb->width, fb->height, fb->pitches[0], hv->fb_size); 163 return -EINVAL; 164 } 165 166 return 0; 167 } 168 169 static void hyperv_plane_atomic_update(struct drm_plane *plane, 170 struct drm_atomic_state *state) 171 { 172 struct hyperv_drm_device *hv = to_hv(plane->dev); 173 struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state, plane); 174 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, plane); 175 struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(new_state); 176 struct drm_rect damage; 177 struct drm_rect dst_clip; 178 struct drm_atomic_helper_damage_iter iter; 179 180 drm_atomic_helper_damage_iter_init(&iter, old_state, new_state); 181 drm_atomic_for_each_plane_damage(&iter, &damage) { 182 dst_clip = new_state->dst; 183 184 if (!drm_rect_intersect(&dst_clip, &damage)) 185 continue; 186 187 hyperv_blit_to_vram_rect(new_state->fb, &shadow_plane_state->data[0], &damage); 188 hyperv_update_dirt(hv->hdev, &damage); 189 } 190 } 191 192 static int hyperv_plane_get_scanout_buffer(struct drm_plane *plane, 193 struct drm_scanout_buffer *sb) 194 { 195 struct hyperv_drm_device *hv = to_hv(plane->dev); 196 struct iosys_map map = IOSYS_MAP_INIT_VADDR_IOMEM(hv->vram); 197 198 if (plane->state && plane->state->fb) { 199 sb->format = plane->state->fb->format; 200 sb->width = plane->state->fb->width; 201 sb->height = plane->state->fb->height; 202 sb->pitch[0] = plane->state->fb->pitches[0]; 203 sb->map[0] = map; 204 return 0; 205 } 206 return -ENODEV; 207 } 208 209 static void hyperv_plane_panic_flush(struct drm_plane *plane) 210 { 211 struct hyperv_drm_device *hv = to_hv(plane->dev); 212 struct drm_rect rect; 213 214 if (!plane->state || !plane->state->fb) 215 return; 216 217 rect.x1 = 0; 218 rect.y1 = 0; 219 rect.x2 = plane->state->fb->width; 220 rect.y2 = plane->state->fb->height; 221 222 hyperv_update_dirt(hv->hdev, &rect); 223 } 224 225 static const struct drm_plane_helper_funcs hyperv_plane_helper_funcs = { 226 DRM_GEM_SHADOW_PLANE_HELPER_FUNCS, 227 .atomic_check = hyperv_plane_atomic_check, 228 .atomic_update = hyperv_plane_atomic_update, 229 .get_scanout_buffer = hyperv_plane_get_scanout_buffer, 230 .panic_flush = hyperv_plane_panic_flush, 231 }; 232 233 static const struct drm_plane_funcs hyperv_plane_funcs = { 234 .update_plane = drm_atomic_helper_update_plane, 235 .disable_plane = drm_atomic_helper_disable_plane, 236 .destroy = drm_plane_cleanup, 237 DRM_GEM_SHADOW_PLANE_FUNCS, 238 }; 239 240 static const struct drm_encoder_funcs hyperv_drm_simple_encoder_funcs_cleanup = { 241 .destroy = drm_encoder_cleanup, 242 }; 243 244 static inline int hyperv_pipe_init(struct hyperv_drm_device *hv) 245 { 246 struct drm_device *dev = &hv->dev; 247 struct drm_encoder *encoder = &hv->encoder; 248 struct drm_plane *plane = &hv->plane; 249 struct drm_crtc *crtc = &hv->crtc; 250 struct drm_connector *connector = &hv->connector; 251 int ret; 252 253 ret = drm_universal_plane_init(dev, plane, 0, 254 &hyperv_plane_funcs, 255 hyperv_formats, ARRAY_SIZE(hyperv_formats), 256 hyperv_modifiers, 257 DRM_PLANE_TYPE_PRIMARY, NULL); 258 if (ret) 259 return ret; 260 drm_plane_helper_add(plane, &hyperv_plane_helper_funcs); 261 drm_plane_enable_fb_damage_clips(plane); 262 263 ret = drm_crtc_init_with_planes(dev, crtc, plane, NULL, 264 &hyperv_crtc_funcs, NULL); 265 if (ret) 266 return ret; 267 drm_crtc_helper_add(crtc, &hyperv_crtc_helper_funcs); 268 269 encoder->possible_crtcs = drm_crtc_mask(crtc); 270 ret = drm_encoder_init(dev, encoder, 271 &hyperv_drm_simple_encoder_funcs_cleanup, 272 DRM_MODE_ENCODER_NONE, NULL); 273 if (ret) 274 return ret; 275 276 ret = hyperv_conn_init(hv); 277 if (ret) { 278 drm_err(dev, "Failed to initialized connector.\n"); 279 return ret; 280 } 281 282 return drm_connector_attach_encoder(connector, encoder); 283 } 284 285 static enum drm_mode_status 286 hyperv_mode_valid(struct drm_device *dev, 287 const struct drm_display_mode *mode) 288 { 289 struct hyperv_drm_device *hv = to_hv(dev); 290 291 if (hyperv_check_size(hv, mode->hdisplay, mode->vdisplay, NULL)) 292 return MODE_BAD; 293 294 return MODE_OK; 295 } 296 297 static const struct drm_mode_config_funcs hyperv_mode_config_funcs = { 298 .fb_create = drm_gem_fb_create_with_dirty, 299 .mode_valid = hyperv_mode_valid, 300 .atomic_check = drm_atomic_helper_check, 301 .atomic_commit = drm_atomic_helper_commit, 302 }; 303 304 int hyperv_mode_config_init(struct hyperv_drm_device *hv) 305 { 306 struct drm_device *dev = &hv->dev; 307 int ret; 308 309 ret = drmm_mode_config_init(dev); 310 if (ret) { 311 drm_err(dev, "Failed to initialized mode setting.\n"); 312 return ret; 313 } 314 315 dev->mode_config.min_width = 0; 316 dev->mode_config.min_height = 0; 317 dev->mode_config.max_width = hv->screen_width_max; 318 dev->mode_config.max_height = hv->screen_height_max; 319 320 dev->mode_config.preferred_depth = hv->screen_depth; 321 dev->mode_config.prefer_shadow = 0; 322 323 dev->mode_config.funcs = &hyperv_mode_config_funcs; 324 325 ret = hyperv_pipe_init(hv); 326 if (ret) { 327 drm_err(dev, "Failed to initialized pipe.\n"); 328 return ret; 329 } 330 331 ret = drm_vblank_init(dev, 1); 332 if (ret) 333 return ret; 334 335 drm_mode_config_reset(dev); 336 337 return 0; 338 } 339