1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright 2019 Hans de Goede <hdegoede@redhat.com> 4 */ 5 6 #include <linux/module.h> 7 #include <linux/usb.h> 8 9 #include <drm/drm_atomic_helper.h> 10 #include <drm/drm_atomic_state_helper.h> 11 #include <drm/drm_connector.h> 12 #include <drm/drm_damage_helper.h> 13 #include <drm/drm_drv.h> 14 #include <drm/drm_edid.h> 15 #include <drm/drm_fbdev_generic.h> 16 #include <drm/drm_file.h> 17 #include <drm/drm_format_helper.h> 18 #include <drm/drm_fourcc.h> 19 #include <drm/drm_framebuffer.h> 20 #include <drm/drm_gem_atomic_helper.h> 21 #include <drm/drm_gem_framebuffer_helper.h> 22 #include <drm/drm_gem_shmem_helper.h> 23 #include <drm/drm_ioctl.h> 24 #include <drm/drm_managed.h> 25 #include <drm/drm_modeset_helper_vtables.h> 26 #include <drm/drm_probe_helper.h> 27 #include <drm/drm_simple_kms_helper.h> 28 29 static bool eco_mode; 30 module_param(eco_mode, bool, 0644); 31 MODULE_PARM_DESC(eco_mode, "Turn on Eco mode (less bright, more silent)"); 32 33 #define DRIVER_NAME "gm12u320" 34 #define DRIVER_DESC "Grain Media GM12U320 USB projector display" 35 #define DRIVER_DATE "2019" 36 #define DRIVER_MAJOR 1 37 #define DRIVER_MINOR 0 38 39 /* 40 * The DLP has an actual width of 854 pixels, but that is not a multiple 41 * of 8, breaking things left and right, so we export a width of 848. 42 */ 43 #define GM12U320_USER_WIDTH 848 44 #define GM12U320_REAL_WIDTH 854 45 #define GM12U320_HEIGHT 480 46 47 #define GM12U320_BLOCK_COUNT 20 48 49 #define GM12U320_ERR(fmt, ...) \ 50 DRM_DEV_ERROR(gm12u320->dev.dev, fmt, ##__VA_ARGS__) 51 52 #define MISC_RCV_EPT 1 53 #define DATA_RCV_EPT 2 54 #define DATA_SND_EPT 3 55 #define MISC_SND_EPT 4 56 57 #define DATA_BLOCK_HEADER_SIZE 84 58 #define DATA_BLOCK_CONTENT_SIZE 64512 59 #define DATA_BLOCK_FOOTER_SIZE 20 60 #define DATA_BLOCK_SIZE (DATA_BLOCK_HEADER_SIZE + \ 61 DATA_BLOCK_CONTENT_SIZE + \ 62 DATA_BLOCK_FOOTER_SIZE) 63 #define DATA_LAST_BLOCK_CONTENT_SIZE 4032 64 #define DATA_LAST_BLOCK_SIZE (DATA_BLOCK_HEADER_SIZE + \ 65 DATA_LAST_BLOCK_CONTENT_SIZE + \ 66 DATA_BLOCK_FOOTER_SIZE) 67 68 #define CMD_SIZE 31 69 #define READ_STATUS_SIZE 13 70 #define MISC_VALUE_SIZE 4 71 72 #define CMD_TIMEOUT msecs_to_jiffies(200) 73 #define DATA_TIMEOUT msecs_to_jiffies(1000) 74 #define IDLE_TIMEOUT msecs_to_jiffies(2000) 75 #define FIRST_FRAME_TIMEOUT msecs_to_jiffies(2000) 76 77 #define MISC_REQ_GET_SET_ECO_A 0xff 78 #define MISC_REQ_GET_SET_ECO_B 0x35 79 /* Windows driver does once every second, with arg d = 1, other args 0 */ 80 #define MISC_REQ_UNKNOWN1_A 0xff 81 #define MISC_REQ_UNKNOWN1_B 0x38 82 /* Windows driver does this on init, with arg a, b = 0, c = 0xa0, d = 4 */ 83 #define MISC_REQ_UNKNOWN2_A 0xa5 84 #define MISC_REQ_UNKNOWN2_B 0x00 85 86 struct gm12u320_device { 87 struct drm_device dev; 88 struct device *dmadev; 89 struct drm_simple_display_pipe pipe; 90 struct drm_connector conn; 91 unsigned char *cmd_buf; 92 unsigned char *data_buf[GM12U320_BLOCK_COUNT]; 93 struct { 94 struct delayed_work work; 95 struct mutex lock; 96 struct drm_framebuffer *fb; 97 struct drm_rect rect; 98 int frame; 99 int draw_status_timeout; 100 struct iosys_map src_map; 101 } fb_update; 102 }; 103 104 #define to_gm12u320(__dev) container_of(__dev, struct gm12u320_device, dev) 105 106 static const char cmd_data[CMD_SIZE] = { 107 0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00, 108 0x68, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x10, 0xff, 109 0x00, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x80, 0x00, 110 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 111 }; 112 113 static const char cmd_draw[CMD_SIZE] = { 114 0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00, 115 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0xfe, 116 0x00, 0x00, 0x00, 0xc0, 0xd1, 0x05, 0x00, 0x40, 117 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 118 }; 119 120 static const char cmd_misc[CMD_SIZE] = { 121 0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00, 122 0x04, 0x00, 0x00, 0x00, 0x80, 0x01, 0x10, 0xfd, 123 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, 0x00, 124 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 125 }; 126 127 static const char data_block_header[DATA_BLOCK_HEADER_SIZE] = { 128 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 129 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 130 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 131 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 132 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 133 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 134 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 135 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 136 0xfb, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 137 0x00, 0x04, 0x15, 0x00, 0x00, 0xfc, 0x00, 0x00, 138 0x01, 0x00, 0x00, 0xdb 139 }; 140 141 static const char data_last_block_header[DATA_BLOCK_HEADER_SIZE] = { 142 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 143 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 144 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 145 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 146 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 147 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 148 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 149 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 150 0xfb, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 151 0x2a, 0x00, 0x20, 0x00, 0xc0, 0x0f, 0x00, 0x00, 152 0x01, 0x00, 0x00, 0xd7 153 }; 154 155 static const char data_block_footer[DATA_BLOCK_FOOTER_SIZE] = { 156 0xfb, 0x14, 0x02, 0x20, 0x00, 0x00, 0x00, 0x00, 157 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 158 0x80, 0x00, 0x00, 0x4f 159 }; 160 161 static inline struct usb_device *gm12u320_to_usb_device(struct gm12u320_device *gm12u320) 162 { 163 return interface_to_usbdev(to_usb_interface(gm12u320->dev.dev)); 164 } 165 166 static int gm12u320_usb_alloc(struct gm12u320_device *gm12u320) 167 { 168 int i, block_size; 169 const char *hdr; 170 171 gm12u320->cmd_buf = drmm_kmalloc(&gm12u320->dev, CMD_SIZE, GFP_KERNEL); 172 if (!gm12u320->cmd_buf) 173 return -ENOMEM; 174 175 for (i = 0; i < GM12U320_BLOCK_COUNT; i++) { 176 if (i == GM12U320_BLOCK_COUNT - 1) { 177 block_size = DATA_LAST_BLOCK_SIZE; 178 hdr = data_last_block_header; 179 } else { 180 block_size = DATA_BLOCK_SIZE; 181 hdr = data_block_header; 182 } 183 184 gm12u320->data_buf[i] = drmm_kzalloc(&gm12u320->dev, 185 block_size, GFP_KERNEL); 186 if (!gm12u320->data_buf[i]) 187 return -ENOMEM; 188 189 memcpy(gm12u320->data_buf[i], hdr, DATA_BLOCK_HEADER_SIZE); 190 memcpy(gm12u320->data_buf[i] + 191 (block_size - DATA_BLOCK_FOOTER_SIZE), 192 data_block_footer, DATA_BLOCK_FOOTER_SIZE); 193 } 194 195 return 0; 196 } 197 198 static int gm12u320_misc_request(struct gm12u320_device *gm12u320, 199 u8 req_a, u8 req_b, 200 u8 arg_a, u8 arg_b, u8 arg_c, u8 arg_d) 201 { 202 struct usb_device *udev = gm12u320_to_usb_device(gm12u320); 203 int ret, len; 204 205 memcpy(gm12u320->cmd_buf, &cmd_misc, CMD_SIZE); 206 gm12u320->cmd_buf[20] = req_a; 207 gm12u320->cmd_buf[21] = req_b; 208 gm12u320->cmd_buf[22] = arg_a; 209 gm12u320->cmd_buf[23] = arg_b; 210 gm12u320->cmd_buf[24] = arg_c; 211 gm12u320->cmd_buf[25] = arg_d; 212 213 /* Send request */ 214 ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, MISC_SND_EPT), 215 gm12u320->cmd_buf, CMD_SIZE, &len, CMD_TIMEOUT); 216 if (ret || len != CMD_SIZE) { 217 GM12U320_ERR("Misc. req. error %d\n", ret); 218 return -EIO; 219 } 220 221 /* Read value */ 222 ret = usb_bulk_msg(udev, usb_rcvbulkpipe(udev, MISC_RCV_EPT), 223 gm12u320->cmd_buf, MISC_VALUE_SIZE, &len, 224 DATA_TIMEOUT); 225 if (ret || len != MISC_VALUE_SIZE) { 226 GM12U320_ERR("Misc. value error %d\n", ret); 227 return -EIO; 228 } 229 /* cmd_buf[0] now contains the read value, which we don't use */ 230 231 /* Read status */ 232 ret = usb_bulk_msg(udev, usb_rcvbulkpipe(udev, MISC_RCV_EPT), 233 gm12u320->cmd_buf, READ_STATUS_SIZE, &len, 234 CMD_TIMEOUT); 235 if (ret || len != READ_STATUS_SIZE) { 236 GM12U320_ERR("Misc. status error %d\n", ret); 237 return -EIO; 238 } 239 240 return 0; 241 } 242 243 static void gm12u320_32bpp_to_24bpp_packed(u8 *dst, u8 *src, int len) 244 { 245 while (len--) { 246 *dst++ = *src++; 247 *dst++ = *src++; 248 *dst++ = *src++; 249 src++; 250 } 251 } 252 253 static void gm12u320_copy_fb_to_blocks(struct gm12u320_device *gm12u320) 254 { 255 int block, dst_offset, len, remain, ret, x1, x2, y1, y2; 256 struct drm_framebuffer *fb; 257 void *vaddr; 258 u8 *src; 259 260 mutex_lock(&gm12u320->fb_update.lock); 261 262 if (!gm12u320->fb_update.fb) 263 goto unlock; 264 265 fb = gm12u320->fb_update.fb; 266 x1 = gm12u320->fb_update.rect.x1; 267 x2 = gm12u320->fb_update.rect.x2; 268 y1 = gm12u320->fb_update.rect.y1; 269 y2 = gm12u320->fb_update.rect.y2; 270 vaddr = gm12u320->fb_update.src_map.vaddr; /* TODO: Use mapping abstraction properly */ 271 272 ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE); 273 if (ret) { 274 GM12U320_ERR("drm_gem_fb_begin_cpu_access err: %d\n", ret); 275 goto put_fb; 276 } 277 278 src = vaddr + y1 * fb->pitches[0] + x1 * 4; 279 280 x1 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2; 281 x2 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2; 282 283 for (; y1 < y2; y1++) { 284 remain = 0; 285 len = (x2 - x1) * 3; 286 dst_offset = (y1 * GM12U320_REAL_WIDTH + x1) * 3; 287 block = dst_offset / DATA_BLOCK_CONTENT_SIZE; 288 dst_offset %= DATA_BLOCK_CONTENT_SIZE; 289 290 if ((dst_offset + len) > DATA_BLOCK_CONTENT_SIZE) { 291 remain = dst_offset + len - DATA_BLOCK_CONTENT_SIZE; 292 len = DATA_BLOCK_CONTENT_SIZE - dst_offset; 293 } 294 295 dst_offset += DATA_BLOCK_HEADER_SIZE; 296 len /= 3; 297 298 gm12u320_32bpp_to_24bpp_packed( 299 gm12u320->data_buf[block] + dst_offset, 300 src, len); 301 302 if (remain) { 303 block++; 304 dst_offset = DATA_BLOCK_HEADER_SIZE; 305 gm12u320_32bpp_to_24bpp_packed( 306 gm12u320->data_buf[block] + dst_offset, 307 src + len * 4, remain / 3); 308 } 309 src += fb->pitches[0]; 310 } 311 312 drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE); 313 put_fb: 314 drm_framebuffer_put(fb); 315 gm12u320->fb_update.fb = NULL; 316 unlock: 317 mutex_unlock(&gm12u320->fb_update.lock); 318 } 319 320 static void gm12u320_fb_update_work(struct work_struct *work) 321 { 322 struct gm12u320_device *gm12u320 = 323 container_of(to_delayed_work(work), struct gm12u320_device, 324 fb_update.work); 325 struct usb_device *udev = gm12u320_to_usb_device(gm12u320); 326 int block, block_size, len; 327 int ret = 0; 328 329 gm12u320_copy_fb_to_blocks(gm12u320); 330 331 for (block = 0; block < GM12U320_BLOCK_COUNT; block++) { 332 if (block == GM12U320_BLOCK_COUNT - 1) 333 block_size = DATA_LAST_BLOCK_SIZE; 334 else 335 block_size = DATA_BLOCK_SIZE; 336 337 /* Send data command to device */ 338 memcpy(gm12u320->cmd_buf, cmd_data, CMD_SIZE); 339 gm12u320->cmd_buf[8] = block_size & 0xff; 340 gm12u320->cmd_buf[9] = block_size >> 8; 341 gm12u320->cmd_buf[20] = 0xfc - block * 4; 342 gm12u320->cmd_buf[21] = 343 block | (gm12u320->fb_update.frame << 7); 344 345 ret = usb_bulk_msg(udev, 346 usb_sndbulkpipe(udev, DATA_SND_EPT), 347 gm12u320->cmd_buf, CMD_SIZE, &len, 348 CMD_TIMEOUT); 349 if (ret || len != CMD_SIZE) 350 goto err; 351 352 /* Send data block to device */ 353 ret = usb_bulk_msg(udev, 354 usb_sndbulkpipe(udev, DATA_SND_EPT), 355 gm12u320->data_buf[block], block_size, 356 &len, DATA_TIMEOUT); 357 if (ret || len != block_size) 358 goto err; 359 360 /* Read status */ 361 ret = usb_bulk_msg(udev, 362 usb_rcvbulkpipe(udev, DATA_RCV_EPT), 363 gm12u320->cmd_buf, READ_STATUS_SIZE, &len, 364 CMD_TIMEOUT); 365 if (ret || len != READ_STATUS_SIZE) 366 goto err; 367 } 368 369 /* Send draw command to device */ 370 memcpy(gm12u320->cmd_buf, cmd_draw, CMD_SIZE); 371 ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, DATA_SND_EPT), 372 gm12u320->cmd_buf, CMD_SIZE, &len, CMD_TIMEOUT); 373 if (ret || len != CMD_SIZE) 374 goto err; 375 376 /* Read status */ 377 ret = usb_bulk_msg(udev, usb_rcvbulkpipe(udev, DATA_RCV_EPT), 378 gm12u320->cmd_buf, READ_STATUS_SIZE, &len, 379 gm12u320->fb_update.draw_status_timeout); 380 if (ret || len != READ_STATUS_SIZE) 381 goto err; 382 383 gm12u320->fb_update.draw_status_timeout = CMD_TIMEOUT; 384 gm12u320->fb_update.frame = !gm12u320->fb_update.frame; 385 386 /* 387 * We must draw a frame every 2s otherwise the projector 388 * switches back to showing its logo. 389 */ 390 queue_delayed_work(system_long_wq, &gm12u320->fb_update.work, 391 IDLE_TIMEOUT); 392 393 return; 394 err: 395 /* Do not log errors caused by module unload or device unplug */ 396 if (ret != -ENODEV && ret != -ECONNRESET && ret != -ESHUTDOWN) 397 GM12U320_ERR("Frame update error: %d\n", ret); 398 } 399 400 static void gm12u320_fb_mark_dirty(struct drm_framebuffer *fb, 401 const struct iosys_map *map, 402 struct drm_rect *dirty) 403 { 404 struct gm12u320_device *gm12u320 = to_gm12u320(fb->dev); 405 struct drm_framebuffer *old_fb = NULL; 406 bool wakeup = false; 407 408 mutex_lock(&gm12u320->fb_update.lock); 409 410 if (gm12u320->fb_update.fb != fb) { 411 old_fb = gm12u320->fb_update.fb; 412 drm_framebuffer_get(fb); 413 gm12u320->fb_update.fb = fb; 414 gm12u320->fb_update.rect = *dirty; 415 gm12u320->fb_update.src_map = *map; 416 wakeup = true; 417 } else { 418 struct drm_rect *rect = &gm12u320->fb_update.rect; 419 420 rect->x1 = min(rect->x1, dirty->x1); 421 rect->y1 = min(rect->y1, dirty->y1); 422 rect->x2 = max(rect->x2, dirty->x2); 423 rect->y2 = max(rect->y2, dirty->y2); 424 } 425 426 mutex_unlock(&gm12u320->fb_update.lock); 427 428 if (wakeup) 429 mod_delayed_work(system_long_wq, &gm12u320->fb_update.work, 0); 430 431 if (old_fb) 432 drm_framebuffer_put(old_fb); 433 } 434 435 static void gm12u320_stop_fb_update(struct gm12u320_device *gm12u320) 436 { 437 struct drm_framebuffer *old_fb; 438 439 cancel_delayed_work_sync(&gm12u320->fb_update.work); 440 441 mutex_lock(&gm12u320->fb_update.lock); 442 old_fb = gm12u320->fb_update.fb; 443 gm12u320->fb_update.fb = NULL; 444 iosys_map_clear(&gm12u320->fb_update.src_map); 445 mutex_unlock(&gm12u320->fb_update.lock); 446 447 drm_framebuffer_put(old_fb); 448 } 449 450 static int gm12u320_set_ecomode(struct gm12u320_device *gm12u320) 451 { 452 return gm12u320_misc_request(gm12u320, MISC_REQ_GET_SET_ECO_A, 453 MISC_REQ_GET_SET_ECO_B, 0x01 /* set */, 454 eco_mode ? 0x01 : 0x00, 0x00, 0x01); 455 } 456 457 /* ------------------------------------------------------------------ */ 458 /* gm12u320 connector */ 459 460 /* 461 * We use fake EDID info so that userspace know that it is dealing with 462 * an Acer projector, rather then listing this as an "unknown" monitor. 463 * Note this assumes this driver is only ever used with the Acer C120, if we 464 * add support for other devices the vendor and model should be parameterized. 465 */ 466 static struct edid gm12u320_edid = { 467 .header = { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 }, 468 .mfg_id = { 0x04, 0x72 }, /* "ACR" */ 469 .prod_code = { 0x20, 0xc1 }, /* C120h */ 470 .serial = 0xaa55aa55, 471 .mfg_week = 1, 472 .mfg_year = 16, 473 .version = 1, /* EDID 1.3 */ 474 .revision = 3, /* EDID 1.3 */ 475 .input = 0x08, /* Analog input */ 476 .features = 0x0a, /* Pref timing in DTD 1 */ 477 .standard_timings = { { 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 }, 478 { 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 } }, 479 .detailed_timings = { { 480 .pixel_clock = 3383, 481 /* hactive = 848, hblank = 256 */ 482 .data.pixel_data.hactive_lo = 0x50, 483 .data.pixel_data.hblank_lo = 0x00, 484 .data.pixel_data.hactive_hblank_hi = 0x31, 485 /* vactive = 480, vblank = 28 */ 486 .data.pixel_data.vactive_lo = 0xe0, 487 .data.pixel_data.vblank_lo = 0x1c, 488 .data.pixel_data.vactive_vblank_hi = 0x10, 489 /* hsync offset 40 pw 128, vsync offset 1 pw 4 */ 490 .data.pixel_data.hsync_offset_lo = 0x28, 491 .data.pixel_data.hsync_pulse_width_lo = 0x80, 492 .data.pixel_data.vsync_offset_pulse_width_lo = 0x14, 493 .data.pixel_data.hsync_vsync_offset_pulse_width_hi = 0x00, 494 /* Digital separate syncs, hsync+, vsync+ */ 495 .data.pixel_data.misc = 0x1e, 496 }, { 497 .pixel_clock = 0, 498 .data.other_data.type = 0xfd, /* Monitor ranges */ 499 .data.other_data.data.range.min_vfreq = 59, 500 .data.other_data.data.range.max_vfreq = 61, 501 .data.other_data.data.range.min_hfreq_khz = 29, 502 .data.other_data.data.range.max_hfreq_khz = 32, 503 .data.other_data.data.range.pixel_clock_mhz = 4, /* 40 MHz */ 504 .data.other_data.data.range.flags = 0, 505 .data.other_data.data.range.formula.cvt = { 506 0xa0, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20 }, 507 }, { 508 .pixel_clock = 0, 509 .data.other_data.type = 0xfc, /* Model string */ 510 .data.other_data.data.str.str = { 511 'P', 'r', 'o', 'j', 'e', 'c', 't', 'o', 'r', '\n', 512 ' ', ' ', ' ' }, 513 }, { 514 .pixel_clock = 0, 515 .data.other_data.type = 0xfe, /* Unspecified text / padding */ 516 .data.other_data.data.str.str = { 517 '\n', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', 518 ' ', ' ', ' ' }, 519 } }, 520 .checksum = 0x13, 521 }; 522 523 static int gm12u320_conn_get_modes(struct drm_connector *connector) 524 { 525 drm_connector_update_edid_property(connector, &gm12u320_edid); 526 return drm_add_edid_modes(connector, &gm12u320_edid); 527 } 528 529 static const struct drm_connector_helper_funcs gm12u320_conn_helper_funcs = { 530 .get_modes = gm12u320_conn_get_modes, 531 }; 532 533 static const struct drm_connector_funcs gm12u320_conn_funcs = { 534 .fill_modes = drm_helper_probe_single_connector_modes, 535 .destroy = drm_connector_cleanup, 536 .reset = drm_atomic_helper_connector_reset, 537 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 538 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 539 }; 540 541 static int gm12u320_conn_init(struct gm12u320_device *gm12u320) 542 { 543 drm_connector_helper_add(&gm12u320->conn, &gm12u320_conn_helper_funcs); 544 return drm_connector_init(&gm12u320->dev, &gm12u320->conn, 545 &gm12u320_conn_funcs, DRM_MODE_CONNECTOR_VGA); 546 } 547 548 /* ------------------------------------------------------------------ */ 549 /* gm12u320 (simple) display pipe */ 550 551 static void gm12u320_pipe_enable(struct drm_simple_display_pipe *pipe, 552 struct drm_crtc_state *crtc_state, 553 struct drm_plane_state *plane_state) 554 { 555 struct drm_rect rect = { 0, 0, GM12U320_USER_WIDTH, GM12U320_HEIGHT }; 556 struct gm12u320_device *gm12u320 = to_gm12u320(pipe->crtc.dev); 557 struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state); 558 559 gm12u320->fb_update.draw_status_timeout = FIRST_FRAME_TIMEOUT; 560 gm12u320_fb_mark_dirty(plane_state->fb, &shadow_plane_state->data[0], &rect); 561 } 562 563 static void gm12u320_pipe_disable(struct drm_simple_display_pipe *pipe) 564 { 565 struct gm12u320_device *gm12u320 = to_gm12u320(pipe->crtc.dev); 566 567 gm12u320_stop_fb_update(gm12u320); 568 } 569 570 static void gm12u320_pipe_update(struct drm_simple_display_pipe *pipe, 571 struct drm_plane_state *old_state) 572 { 573 struct drm_plane_state *state = pipe->plane.state; 574 struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(state); 575 struct drm_rect rect; 576 577 if (drm_atomic_helper_damage_merged(old_state, state, &rect)) 578 gm12u320_fb_mark_dirty(state->fb, &shadow_plane_state->data[0], &rect); 579 } 580 581 static const struct drm_simple_display_pipe_funcs gm12u320_pipe_funcs = { 582 .enable = gm12u320_pipe_enable, 583 .disable = gm12u320_pipe_disable, 584 .update = gm12u320_pipe_update, 585 DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS, 586 }; 587 588 static const uint32_t gm12u320_pipe_formats[] = { 589 DRM_FORMAT_XRGB8888, 590 }; 591 592 static const uint64_t gm12u320_pipe_modifiers[] = { 593 DRM_FORMAT_MOD_LINEAR, 594 DRM_FORMAT_MOD_INVALID 595 }; 596 597 /* 598 * FIXME: Dma-buf sharing requires DMA support by the importing device. 599 * This function is a workaround to make USB devices work as well. 600 * See todo.rst for how to fix the issue in the dma-buf framework. 601 */ 602 static struct drm_gem_object *gm12u320_gem_prime_import(struct drm_device *dev, 603 struct dma_buf *dma_buf) 604 { 605 struct gm12u320_device *gm12u320 = to_gm12u320(dev); 606 607 if (!gm12u320->dmadev) 608 return ERR_PTR(-ENODEV); 609 610 return drm_gem_prime_import_dev(dev, dma_buf, gm12u320->dmadev); 611 } 612 613 DEFINE_DRM_GEM_FOPS(gm12u320_fops); 614 615 static const struct drm_driver gm12u320_drm_driver = { 616 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC, 617 618 .name = DRIVER_NAME, 619 .desc = DRIVER_DESC, 620 .date = DRIVER_DATE, 621 .major = DRIVER_MAJOR, 622 .minor = DRIVER_MINOR, 623 624 .fops = &gm12u320_fops, 625 DRM_GEM_SHMEM_DRIVER_OPS, 626 .gem_prime_import = gm12u320_gem_prime_import, 627 }; 628 629 static const struct drm_mode_config_funcs gm12u320_mode_config_funcs = { 630 .fb_create = drm_gem_fb_create_with_dirty, 631 .atomic_check = drm_atomic_helper_check, 632 .atomic_commit = drm_atomic_helper_commit, 633 }; 634 635 static int gm12u320_usb_probe(struct usb_interface *interface, 636 const struct usb_device_id *id) 637 { 638 struct gm12u320_device *gm12u320; 639 struct drm_device *dev; 640 int ret; 641 642 /* 643 * The gm12u320 presents itself to the system as 2 usb mass-storage 644 * interfaces, we only care about / need the first one. 645 */ 646 if (interface->cur_altsetting->desc.bInterfaceNumber != 0) 647 return -ENODEV; 648 649 gm12u320 = devm_drm_dev_alloc(&interface->dev, &gm12u320_drm_driver, 650 struct gm12u320_device, dev); 651 if (IS_ERR(gm12u320)) 652 return PTR_ERR(gm12u320); 653 dev = &gm12u320->dev; 654 655 gm12u320->dmadev = usb_intf_get_dma_device(to_usb_interface(dev->dev)); 656 if (!gm12u320->dmadev) 657 drm_warn(dev, "buffer sharing not supported"); /* not an error */ 658 659 INIT_DELAYED_WORK(&gm12u320->fb_update.work, gm12u320_fb_update_work); 660 mutex_init(&gm12u320->fb_update.lock); 661 662 ret = drmm_mode_config_init(dev); 663 if (ret) 664 goto err_put_device; 665 666 dev->mode_config.min_width = GM12U320_USER_WIDTH; 667 dev->mode_config.max_width = GM12U320_USER_WIDTH; 668 dev->mode_config.min_height = GM12U320_HEIGHT; 669 dev->mode_config.max_height = GM12U320_HEIGHT; 670 dev->mode_config.funcs = &gm12u320_mode_config_funcs; 671 672 ret = gm12u320_usb_alloc(gm12u320); 673 if (ret) 674 goto err_put_device; 675 676 ret = gm12u320_set_ecomode(gm12u320); 677 if (ret) 678 goto err_put_device; 679 680 ret = gm12u320_conn_init(gm12u320); 681 if (ret) 682 goto err_put_device; 683 684 ret = drm_simple_display_pipe_init(&gm12u320->dev, 685 &gm12u320->pipe, 686 &gm12u320_pipe_funcs, 687 gm12u320_pipe_formats, 688 ARRAY_SIZE(gm12u320_pipe_formats), 689 gm12u320_pipe_modifiers, 690 &gm12u320->conn); 691 if (ret) 692 goto err_put_device; 693 694 drm_mode_config_reset(dev); 695 696 usb_set_intfdata(interface, dev); 697 ret = drm_dev_register(dev, 0); 698 if (ret) 699 goto err_put_device; 700 701 drm_fbdev_generic_setup(dev, 0); 702 703 return 0; 704 705 err_put_device: 706 put_device(gm12u320->dmadev); 707 return ret; 708 } 709 710 static void gm12u320_usb_disconnect(struct usb_interface *interface) 711 { 712 struct drm_device *dev = usb_get_intfdata(interface); 713 struct gm12u320_device *gm12u320 = to_gm12u320(dev); 714 715 put_device(gm12u320->dmadev); 716 gm12u320->dmadev = NULL; 717 drm_dev_unplug(dev); 718 drm_atomic_helper_shutdown(dev); 719 } 720 721 static __maybe_unused int gm12u320_suspend(struct usb_interface *interface, 722 pm_message_t message) 723 { 724 struct drm_device *dev = usb_get_intfdata(interface); 725 726 return drm_mode_config_helper_suspend(dev); 727 } 728 729 static __maybe_unused int gm12u320_resume(struct usb_interface *interface) 730 { 731 struct drm_device *dev = usb_get_intfdata(interface); 732 struct gm12u320_device *gm12u320 = to_gm12u320(dev); 733 734 gm12u320_set_ecomode(gm12u320); 735 736 return drm_mode_config_helper_resume(dev); 737 } 738 739 static const struct usb_device_id id_table[] = { 740 { USB_DEVICE(0x1de1, 0xc102) }, 741 {}, 742 }; 743 MODULE_DEVICE_TABLE(usb, id_table); 744 745 static struct usb_driver gm12u320_usb_driver = { 746 .name = "gm12u320", 747 .probe = gm12u320_usb_probe, 748 .disconnect = gm12u320_usb_disconnect, 749 .id_table = id_table, 750 #ifdef CONFIG_PM 751 .suspend = gm12u320_suspend, 752 .resume = gm12u320_resume, 753 .reset_resume = gm12u320_resume, 754 #endif 755 }; 756 757 module_usb_driver(gm12u320_usb_driver); 758 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); 759 MODULE_LICENSE("GPL"); 760