1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * Copyright 2019 Hans de Goede <hdegoede@redhat.com> 4 */ 5 6#include <linux/dma-buf.h> 7#include <linux/module.h> 8#include <linux/usb.h> 9 10#include <drm/drm_atomic_helper.h> 11#include <drm/drm_atomic_state_helper.h> 12#include <drm/drm_connector.h> 13#include <drm/drm_damage_helper.h> 14#include <drm/drm_drv.h> 15#include <drm/drm_fb_helper.h> 16#include <drm/drm_file.h> 17#include <drm/drm_format_helper.h> 18#include <drm/drm_fourcc.h> 19#include <drm/drm_gem_shmem_helper.h> 20#include <drm/drm_gem_framebuffer_helper.h> 21#include <drm/drm_ioctl.h> 22#include <drm/drm_managed.h> 23#include <drm/drm_modeset_helper_vtables.h> 24#include <drm/drm_probe_helper.h> 25#include <drm/drm_simple_kms_helper.h> 26 27static bool eco_mode; 28module_param(eco_mode, bool, 0644); 29MODULE_PARM_DESC(eco_mode, "Turn on Eco mode (less bright, more silent)"); 30 31#define DRIVER_NAME "gm12u320" 32#define DRIVER_DESC "Grain Media GM12U320 USB projector display" 33#define DRIVER_DATE "2019" 34#define DRIVER_MAJOR 1 35#define DRIVER_MINOR 0 36 37/* 38 * The DLP has an actual width of 854 pixels, but that is not a multiple 39 * of 8, breaking things left and right, so we export a width of 848. 40 */ 41#define GM12U320_USER_WIDTH 848 42#define GM12U320_REAL_WIDTH 854 43#define GM12U320_HEIGHT 480 44 45#define GM12U320_BLOCK_COUNT 20 46 47#define GM12U320_ERR(fmt, ...) \ 48 DRM_DEV_ERROR(&gm12u320->udev->dev, fmt, ##__VA_ARGS__) 49 50#define MISC_RCV_EPT 1 51#define DATA_RCV_EPT 2 52#define DATA_SND_EPT 3 53#define MISC_SND_EPT 4 54 55#define DATA_BLOCK_HEADER_SIZE 84 56#define DATA_BLOCK_CONTENT_SIZE 64512 57#define DATA_BLOCK_FOOTER_SIZE 20 58#define DATA_BLOCK_SIZE (DATA_BLOCK_HEADER_SIZE + \ 59 DATA_BLOCK_CONTENT_SIZE + \ 60 DATA_BLOCK_FOOTER_SIZE) 61#define DATA_LAST_BLOCK_CONTENT_SIZE 4032 62#define DATA_LAST_BLOCK_SIZE (DATA_BLOCK_HEADER_SIZE + \ 63 DATA_LAST_BLOCK_CONTENT_SIZE + \ 64 DATA_BLOCK_FOOTER_SIZE) 65 66#define CMD_SIZE 31 67#define READ_STATUS_SIZE 13 68#define MISC_VALUE_SIZE 4 69 70#define CMD_TIMEOUT 200 71#define DATA_TIMEOUT 1000 72#define IDLE_TIMEOUT 2000 73#define FIRST_FRAME_TIMEOUT 2000 74 75#define MISC_REQ_GET_SET_ECO_A 0xff 76#define MISC_REQ_GET_SET_ECO_B 0x35 77/* Windows driver does once every second, with arg d = 1, other args 0 */ 78#define MISC_REQ_UNKNOWN1_A 0xff 79#define MISC_REQ_UNKNOWN1_B 0x38 80/* Windows driver does this on init, with arg a, b = 0, c = 0xa0, d = 4 */ 81#define MISC_REQ_UNKNOWN2_A 0xa5 82#define MISC_REQ_UNKNOWN2_B 0x00 83 84struct gm12u320_device { 85 struct drm_device dev; 86 struct device *dmadev; 87 struct drm_simple_display_pipe pipe; 88 struct drm_connector conn; 89 struct usb_device *udev; 90 unsigned char *cmd_buf; 91 unsigned char *data_buf[GM12U320_BLOCK_COUNT]; 92 struct { 93 struct delayed_work work; 94 struct mutex lock; 95 struct drm_framebuffer *fb; 96 struct drm_rect rect; 97 int frame; 98 int draw_status_timeout; 99 } fb_update; 100}; 101 102#define to_gm12u320(__dev) container_of(__dev, struct gm12u320_device, dev) 103 104static const char cmd_data[CMD_SIZE] = { 105 0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00, 106 0x68, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x10, 0xff, 107 0x00, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x80, 0x00, 108 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 109}; 110 111static const char cmd_draw[CMD_SIZE] = { 112 0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00, 113 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0xfe, 114 0x00, 0x00, 0x00, 0xc0, 0xd1, 0x05, 0x00, 0x40, 115 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 116}; 117 118static const char cmd_misc[CMD_SIZE] = { 119 0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00, 120 0x04, 0x00, 0x00, 0x00, 0x80, 0x01, 0x10, 0xfd, 121 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, 0x00, 122 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 123}; 124 125static const char data_block_header[DATA_BLOCK_HEADER_SIZE] = { 126 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 127 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 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 0xfb, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 135 0x00, 0x04, 0x15, 0x00, 0x00, 0xfc, 0x00, 0x00, 136 0x01, 0x00, 0x00, 0xdb 137}; 138 139static const char data_last_block_header[DATA_BLOCK_HEADER_SIZE] = { 140 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 141 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 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 0xfb, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 149 0x2a, 0x00, 0x20, 0x00, 0xc0, 0x0f, 0x00, 0x00, 150 0x01, 0x00, 0x00, 0xd7 151}; 152 153static const char data_block_footer[DATA_BLOCK_FOOTER_SIZE] = { 154 0xfb, 0x14, 0x02, 0x20, 0x00, 0x00, 0x00, 0x00, 155 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 156 0x80, 0x00, 0x00, 0x4f 157}; 158 159static int gm12u320_usb_alloc(struct gm12u320_device *gm12u320) 160{ 161 int i, block_size; 162 const char *hdr; 163 164 gm12u320->cmd_buf = drmm_kmalloc(&gm12u320->dev, CMD_SIZE, GFP_KERNEL); 165 if (!gm12u320->cmd_buf) 166 return -ENOMEM; 167 168 for (i = 0; i < GM12U320_BLOCK_COUNT; i++) { 169 if (i == GM12U320_BLOCK_COUNT - 1) { 170 block_size = DATA_LAST_BLOCK_SIZE; 171 hdr = data_last_block_header; 172 } else { 173 block_size = DATA_BLOCK_SIZE; 174 hdr = data_block_header; 175 } 176 177 gm12u320->data_buf[i] = drmm_kzalloc(&gm12u320->dev, 178 block_size, GFP_KERNEL); 179 if (!gm12u320->data_buf[i]) 180 return -ENOMEM; 181 182 memcpy(gm12u320->data_buf[i], hdr, DATA_BLOCK_HEADER_SIZE); 183 memcpy(gm12u320->data_buf[i] + 184 (block_size - DATA_BLOCK_FOOTER_SIZE), 185 data_block_footer, DATA_BLOCK_FOOTER_SIZE); 186 } 187 188 return 0; 189} 190 191static int gm12u320_misc_request(struct gm12u320_device *gm12u320, 192 u8 req_a, u8 req_b, 193 u8 arg_a, u8 arg_b, u8 arg_c, u8 arg_d) 194{ 195 int ret, len; 196 197 memcpy(gm12u320->cmd_buf, &cmd_misc, CMD_SIZE); 198 gm12u320->cmd_buf[20] = req_a; 199 gm12u320->cmd_buf[21] = req_b; 200 gm12u320->cmd_buf[22] = arg_a; 201 gm12u320->cmd_buf[23] = arg_b; 202 gm12u320->cmd_buf[24] = arg_c; 203 gm12u320->cmd_buf[25] = arg_d; 204 205 /* Send request */ 206 ret = usb_bulk_msg(gm12u320->udev, 207 usb_sndbulkpipe(gm12u320->udev, MISC_SND_EPT), 208 gm12u320->cmd_buf, CMD_SIZE, &len, CMD_TIMEOUT); 209 if (ret || len != CMD_SIZE) { 210 GM12U320_ERR("Misc. req. error %d\n", ret); 211 return -EIO; 212 } 213 214 /* Read value */ 215 ret = usb_bulk_msg(gm12u320->udev, 216 usb_rcvbulkpipe(gm12u320->udev, MISC_RCV_EPT), 217 gm12u320->cmd_buf, MISC_VALUE_SIZE, &len, 218 DATA_TIMEOUT); 219 if (ret || len != MISC_VALUE_SIZE) { 220 GM12U320_ERR("Misc. value error %d\n", ret); 221 return -EIO; 222 } 223 /* cmd_buf[0] now contains the read value, which we don't use */ 224 225 /* Read status */ 226 ret = usb_bulk_msg(gm12u320->udev, 227 usb_rcvbulkpipe(gm12u320->udev, MISC_RCV_EPT), 228 gm12u320->cmd_buf, READ_STATUS_SIZE, &len, 229 CMD_TIMEOUT); 230 if (ret || len != READ_STATUS_SIZE) { 231 GM12U320_ERR("Misc. status error %d\n", ret); 232 return -EIO; 233 } 234 235 return 0; 236} 237 238static void gm12u320_32bpp_to_24bpp_packed(u8 *dst, u8 *src, int len) 239{ 240 while (len--) { 241 *dst++ = *src++; 242 *dst++ = *src++; 243 *dst++ = *src++; 244 src++; 245 } 246} 247 248static void gm12u320_copy_fb_to_blocks(struct gm12u320_device *gm12u320) 249{ 250 int block, dst_offset, len, remain, ret, x1, x2, y1, y2; 251 struct drm_framebuffer *fb; 252 void *vaddr; 253 u8 *src; 254 255 mutex_lock(&gm12u320->fb_update.lock); 256 257 if (!gm12u320->fb_update.fb) 258 goto unlock; 259 260 fb = gm12u320->fb_update.fb; 261 x1 = gm12u320->fb_update.rect.x1; 262 x2 = gm12u320->fb_update.rect.x2; 263 y1 = gm12u320->fb_update.rect.y1; 264 y2 = gm12u320->fb_update.rect.y2; 265 266 vaddr = drm_gem_shmem_vmap(fb->obj[0]); 267 if (IS_ERR(vaddr)) { 268 GM12U320_ERR("failed to vmap fb: %ld\n", PTR_ERR(vaddr)); 269 goto put_fb; 270 } 271 272 if (fb->obj[0]->import_attach) { 273 ret = dma_buf_begin_cpu_access( 274 fb->obj[0]->import_attach->dmabuf, DMA_FROM_DEVICE); 275 if (ret) { 276 GM12U320_ERR("dma_buf_begin_cpu_access err: %d\n", ret); 277 goto vunmap; 278 } 279 } 280 281 src = vaddr + y1 * fb->pitches[0] + x1 * 4; 282 283 x1 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2; 284 x2 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2; 285 286 for (; y1 < y2; y1++) { 287 remain = 0; 288 len = (x2 - x1) * 3; 289 dst_offset = (y1 * GM12U320_REAL_WIDTH + x1) * 3; 290 block = dst_offset / DATA_BLOCK_CONTENT_SIZE; 291 dst_offset %= DATA_BLOCK_CONTENT_SIZE; 292 293 if ((dst_offset + len) > DATA_BLOCK_CONTENT_SIZE) { 294 remain = dst_offset + len - DATA_BLOCK_CONTENT_SIZE; 295 len = DATA_BLOCK_CONTENT_SIZE - dst_offset; 296 } 297 298 dst_offset += DATA_BLOCK_HEADER_SIZE; 299 len /= 3; 300 301 gm12u320_32bpp_to_24bpp_packed( 302 gm12u320->data_buf[block] + dst_offset, 303 src, len); 304 305 if (remain) { 306 block++; 307 dst_offset = DATA_BLOCK_HEADER_SIZE; 308 gm12u320_32bpp_to_24bpp_packed( 309 gm12u320->data_buf[block] + dst_offset, 310 src + len * 4, remain / 3); 311 } 312 src += fb->pitches[0]; 313 } 314 315 if (fb->obj[0]->import_attach) { 316 ret = dma_buf_end_cpu_access(fb->obj[0]->import_attach->dmabuf, 317 DMA_FROM_DEVICE); 318 if (ret) 319 GM12U320_ERR("dma_buf_end_cpu_access err: %d\n", ret); 320 } 321vunmap: 322 drm_gem_shmem_vunmap(fb->obj[0], vaddr); 323put_fb: 324 drm_framebuffer_put(fb); 325 gm12u320->fb_update.fb = NULL; 326unlock: 327 mutex_unlock(&gm12u320->fb_update.lock); 328} 329 330static void gm12u320_fb_update_work(struct work_struct *work) 331{ 332 struct gm12u320_device *gm12u320 = 333 container_of(to_delayed_work(work), struct gm12u320_device, 334 fb_update.work); 335 int block, block_size, len; 336 int ret = 0; 337 338 gm12u320_copy_fb_to_blocks(gm12u320); 339 340 for (block = 0; block < GM12U320_BLOCK_COUNT; block++) { 341 if (block == GM12U320_BLOCK_COUNT - 1) 342 block_size = DATA_LAST_BLOCK_SIZE; 343 else 344 block_size = DATA_BLOCK_SIZE; 345 346 /* Send data command to device */ 347 memcpy(gm12u320->cmd_buf, cmd_data, CMD_SIZE); 348 gm12u320->cmd_buf[8] = block_size & 0xff; 349 gm12u320->cmd_buf[9] = block_size >> 8; 350 gm12u320->cmd_buf[20] = 0xfc - block * 4; 351 gm12u320->cmd_buf[21] = 352 block | (gm12u320->fb_update.frame << 7); 353 354 ret = usb_bulk_msg(gm12u320->udev, 355 usb_sndbulkpipe(gm12u320->udev, DATA_SND_EPT), 356 gm12u320->cmd_buf, CMD_SIZE, &len, 357 CMD_TIMEOUT); 358 if (ret || len != CMD_SIZE) 359 goto err; 360 361 /* Send data block to device */ 362 ret = usb_bulk_msg(gm12u320->udev, 363 usb_sndbulkpipe(gm12u320->udev, DATA_SND_EPT), 364 gm12u320->data_buf[block], block_size, 365 &len, DATA_TIMEOUT); 366 if (ret || len != block_size) 367 goto err; 368 369 /* Read status */ 370 ret = usb_bulk_msg(gm12u320->udev, 371 usb_rcvbulkpipe(gm12u320->udev, DATA_RCV_EPT), 372 gm12u320->cmd_buf, READ_STATUS_SIZE, &len, 373 CMD_TIMEOUT); 374 if (ret || len != READ_STATUS_SIZE) 375 goto err; 376 } 377 378 /* Send draw command to device */ 379 memcpy(gm12u320->cmd_buf, cmd_draw, CMD_SIZE); 380 ret = usb_bulk_msg(gm12u320->udev, 381 usb_sndbulkpipe(gm12u320->udev, DATA_SND_EPT), 382 gm12u320->cmd_buf, CMD_SIZE, &len, CMD_TIMEOUT); 383 if (ret || len != CMD_SIZE) 384 goto err; 385 386 /* Read status */ 387 ret = usb_bulk_msg(gm12u320->udev, 388 usb_rcvbulkpipe(gm12u320->udev, DATA_RCV_EPT), 389 gm12u320->cmd_buf, READ_STATUS_SIZE, &len, 390 gm12u320->fb_update.draw_status_timeout); 391 if (ret || len != READ_STATUS_SIZE) 392 goto err; 393 394 gm12u320->fb_update.draw_status_timeout = CMD_TIMEOUT; 395 gm12u320->fb_update.frame = !gm12u320->fb_update.frame; 396 397 /* 398 * We must draw a frame every 2s otherwise the projector 399 * switches back to showing its logo. 400 */ 401 queue_delayed_work(system_long_wq, &gm12u320->fb_update.work, 402 msecs_to_jiffies(IDLE_TIMEOUT)); 403 404 return; 405err: 406 /* Do not log errors caused by module unload or device unplug */ 407 if (ret != -ENODEV && ret != -ECONNRESET && ret != -ESHUTDOWN) 408 GM12U320_ERR("Frame update error: %d\n", ret); 409} 410 411static void gm12u320_fb_mark_dirty(struct drm_framebuffer *fb, 412 struct drm_rect *dirty) 413{ 414 struct gm12u320_device *gm12u320 = to_gm12u320(fb->dev); 415 struct drm_framebuffer *old_fb = NULL; 416 bool wakeup = false; 417 418 mutex_lock(&gm12u320->fb_update.lock); 419 420 if (gm12u320->fb_update.fb != fb) { 421 old_fb = gm12u320->fb_update.fb; 422 drm_framebuffer_get(fb); 423 gm12u320->fb_update.fb = fb; 424 gm12u320->fb_update.rect = *dirty; 425 wakeup = true; 426 } else { 427 struct drm_rect *rect = &gm12u320->fb_update.rect; 428 429 rect->x1 = min(rect->x1, dirty->x1); 430 rect->y1 = min(rect->y1, dirty->y1); 431 rect->x2 = max(rect->x2, dirty->x2); 432 rect->y2 = max(rect->y2, dirty->y2); 433 } 434 435 mutex_unlock(&gm12u320->fb_update.lock); 436 437 if (wakeup) 438 mod_delayed_work(system_long_wq, &gm12u320->fb_update.work, 0); 439 440 if (old_fb) 441 drm_framebuffer_put(old_fb); 442} 443 444static void gm12u320_stop_fb_update(struct gm12u320_device *gm12u320) 445{ 446 struct drm_framebuffer *old_fb; 447 448 cancel_delayed_work_sync(&gm12u320->fb_update.work); 449 450 mutex_lock(&gm12u320->fb_update.lock); 451 old_fb = gm12u320->fb_update.fb; 452 gm12u320->fb_update.fb = NULL; 453 mutex_unlock(&gm12u320->fb_update.lock); 454 455 drm_framebuffer_put(old_fb); 456} 457 458static int gm12u320_set_ecomode(struct gm12u320_device *gm12u320) 459{ 460 return gm12u320_misc_request(gm12u320, MISC_REQ_GET_SET_ECO_A, 461 MISC_REQ_GET_SET_ECO_B, 0x01 /* set */, 462 eco_mode ? 0x01 : 0x00, 0x00, 0x01); 463} 464 465/* ------------------------------------------------------------------ */ 466/* gm12u320 connector */ 467 468/* 469 * We use fake EDID info so that userspace know that it is dealing with 470 * an Acer projector, rather then listing this as an "unknown" monitor. 471 * Note this assumes this driver is only ever used with the Acer C120, if we 472 * add support for other devices the vendor and model should be parameterized. 473 */ 474static struct edid gm12u320_edid = { 475 .header = { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 }, 476 .mfg_id = { 0x04, 0x72 }, /* "ACR" */ 477 .prod_code = { 0x20, 0xc1 }, /* C120h */ 478 .serial = 0xaa55aa55, 479 .mfg_week = 1, 480 .mfg_year = 16, 481 .version = 1, /* EDID 1.3 */ 482 .revision = 3, /* EDID 1.3 */ 483 .input = 0x08, /* Analog input */ 484 .features = 0x0a, /* Pref timing in DTD 1 */ 485 .standard_timings = { { 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 }, 486 { 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 } }, 487 .detailed_timings = { { 488 .pixel_clock = 3383, 489 /* hactive = 848, hblank = 256 */ 490 .data.pixel_data.hactive_lo = 0x50, 491 .data.pixel_data.hblank_lo = 0x00, 492 .data.pixel_data.hactive_hblank_hi = 0x31, 493 /* vactive = 480, vblank = 28 */ 494 .data.pixel_data.vactive_lo = 0xe0, 495 .data.pixel_data.vblank_lo = 0x1c, 496 .data.pixel_data.vactive_vblank_hi = 0x10, 497 /* hsync offset 40 pw 128, vsync offset 1 pw 4 */ 498 .data.pixel_data.hsync_offset_lo = 0x28, 499 .data.pixel_data.hsync_pulse_width_lo = 0x80, 500 .data.pixel_data.vsync_offset_pulse_width_lo = 0x14, 501 .data.pixel_data.hsync_vsync_offset_pulse_width_hi = 0x00, 502 /* Digital separate syncs, hsync+, vsync+ */ 503 .data.pixel_data.misc = 0x1e, 504 }, { 505 .pixel_clock = 0, 506 .data.other_data.type = 0xfd, /* Monitor ranges */ 507 .data.other_data.data.range.min_vfreq = 59, 508 .data.other_data.data.range.max_vfreq = 61, 509 .data.other_data.data.range.min_hfreq_khz = 29, 510 .data.other_data.data.range.max_hfreq_khz = 32, 511 .data.other_data.data.range.pixel_clock_mhz = 4, /* 40 MHz */ 512 .data.other_data.data.range.flags = 0, 513 .data.other_data.data.range.formula.cvt = { 514 0xa0, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20 }, 515 }, { 516 .pixel_clock = 0, 517 .data.other_data.type = 0xfc, /* Model string */ 518 .data.other_data.data.str.str = { 519 'P', 'r', 'o', 'j', 'e', 'c', 't', 'o', 'r', '\n', 520 ' ', ' ', ' ' }, 521 }, { 522 .pixel_clock = 0, 523 .data.other_data.type = 0xfe, /* Unspecified text / padding */ 524 .data.other_data.data.str.str = { 525 '\n', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', 526 ' ', ' ', ' ' }, 527 } }, 528 .checksum = 0x13, 529}; 530 531static int gm12u320_conn_get_modes(struct drm_connector *connector) 532{ 533 drm_connector_update_edid_property(connector, &gm12u320_edid); 534 return drm_add_edid_modes(connector, &gm12u320_edid); 535} 536 537static const struct drm_connector_helper_funcs gm12u320_conn_helper_funcs = { 538 .get_modes = gm12u320_conn_get_modes, 539}; 540 541static const struct drm_connector_funcs gm12u320_conn_funcs = { 542 .fill_modes = drm_helper_probe_single_connector_modes, 543 .destroy = drm_connector_cleanup, 544 .reset = drm_atomic_helper_connector_reset, 545 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 546 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 547}; 548 549static int gm12u320_conn_init(struct gm12u320_device *gm12u320) 550{ 551 drm_connector_helper_add(&gm12u320->conn, &gm12u320_conn_helper_funcs); 552 return drm_connector_init(&gm12u320->dev, &gm12u320->conn, 553 &gm12u320_conn_funcs, DRM_MODE_CONNECTOR_VGA); 554} 555 556/* ------------------------------------------------------------------ */ 557/* gm12u320 (simple) display pipe */ 558 559static void gm12u320_pipe_enable(struct drm_simple_display_pipe *pipe, 560 struct drm_crtc_state *crtc_state, 561 struct drm_plane_state *plane_state) 562{ 563 struct drm_rect rect = { 0, 0, GM12U320_USER_WIDTH, GM12U320_HEIGHT }; 564 struct gm12u320_device *gm12u320 = to_gm12u320(pipe->crtc.dev); 565 566 gm12u320->fb_update.draw_status_timeout = FIRST_FRAME_TIMEOUT; 567 gm12u320_fb_mark_dirty(plane_state->fb, &rect); 568} 569 570static void gm12u320_pipe_disable(struct drm_simple_display_pipe *pipe) 571{ 572 struct gm12u320_device *gm12u320 = to_gm12u320(pipe->crtc.dev); 573 574 gm12u320_stop_fb_update(gm12u320); 575} 576 577static void gm12u320_pipe_update(struct drm_simple_display_pipe *pipe, 578 struct drm_plane_state *old_state) 579{ 580 struct drm_plane_state *state = pipe->plane.state; 581 struct drm_rect rect; 582 583 if (drm_atomic_helper_damage_merged(old_state, state, &rect)) 584 gm12u320_fb_mark_dirty(pipe->plane.state->fb, &rect); 585} 586 587static const struct drm_simple_display_pipe_funcs gm12u320_pipe_funcs = { 588 .enable = gm12u320_pipe_enable, 589 .disable = gm12u320_pipe_disable, 590 .update = gm12u320_pipe_update, 591}; 592 593static const uint32_t gm12u320_pipe_formats[] = { 594 DRM_FORMAT_XRGB8888, 595}; 596 597static const uint64_t gm12u320_pipe_modifiers[] = { 598 DRM_FORMAT_MOD_LINEAR, 599 DRM_FORMAT_MOD_INVALID 600}; 601 602/* 603 * FIXME: Dma-buf sharing requires DMA support by the importing device. 604 * This function is a workaround to make USB devices work as well. 605 * See todo.rst for how to fix the issue in the dma-buf framework. 606 */ 607static struct drm_gem_object *gm12u320_gem_prime_import(struct drm_device *dev, 608 struct dma_buf *dma_buf) 609{ 610 struct gm12u320_device *gm12u320 = to_gm12u320(dev); 611 612 if (!gm12u320->dmadev) 613 return ERR_PTR(-ENODEV); 614 615 return drm_gem_prime_import_dev(dev, dma_buf, gm12u320->dmadev); 616} 617 618DEFINE_DRM_GEM_FOPS(gm12u320_fops); 619 620static struct drm_driver gm12u320_drm_driver = { 621 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC, 622 623 .name = DRIVER_NAME, 624 .desc = DRIVER_DESC, 625 .date = DRIVER_DATE, 626 .major = DRIVER_MAJOR, 627 .minor = DRIVER_MINOR, 628 629 .fops = &gm12u320_fops, 630 DRM_GEM_SHMEM_DRIVER_OPS, 631 .gem_prime_import = gm12u320_gem_prime_import, 632}; 633 634static const struct drm_mode_config_funcs gm12u320_mode_config_funcs = { 635 .fb_create = drm_gem_fb_create_with_dirty, 636 .atomic_check = drm_atomic_helper_check, 637 .atomic_commit = drm_atomic_helper_commit, 638}; 639 640static int gm12u320_usb_probe(struct usb_interface *interface, 641 const struct usb_device_id *id) 642{ 643 struct gm12u320_device *gm12u320; 644 struct drm_device *dev; 645 int ret; 646 647 /* 648 * The gm12u320 presents itself to the system as 2 usb mass-storage 649 * interfaces, we only care about / need the first one. 650 */ 651 if (interface->cur_altsetting->desc.bInterfaceNumber != 0) 652 return -ENODEV; 653 654 gm12u320 = devm_drm_dev_alloc(&interface->dev, &gm12u320_drm_driver, 655 struct gm12u320_device, dev); 656 if (IS_ERR(gm12u320)) 657 return PTR_ERR(gm12u320); 658 dev = &gm12u320->dev; 659 660 gm12u320->dmadev = usb_intf_get_dma_device(to_usb_interface(dev->dev)); 661 if (!gm12u320->dmadev) 662 drm_warn(dev, "buffer sharing not supported"); /* not an error */ 663 664 gm12u320->udev = interface_to_usbdev(interface); 665 INIT_DELAYED_WORK(&gm12u320->fb_update.work, gm12u320_fb_update_work); 666 mutex_init(&gm12u320->fb_update.lock); 667 668 ret = drmm_mode_config_init(dev); 669 if (ret) 670 goto err_put_device; 671 672 dev->mode_config.min_width = GM12U320_USER_WIDTH; 673 dev->mode_config.max_width = GM12U320_USER_WIDTH; 674 dev->mode_config.min_height = GM12U320_HEIGHT; 675 dev->mode_config.max_height = GM12U320_HEIGHT; 676 dev->mode_config.funcs = &gm12u320_mode_config_funcs; 677 678 ret = gm12u320_usb_alloc(gm12u320); 679 if (ret) 680 goto err_put_device; 681 682 ret = gm12u320_set_ecomode(gm12u320); 683 if (ret) 684 goto err_put_device; 685 686 ret = gm12u320_conn_init(gm12u320); 687 if (ret) 688 goto err_put_device; 689 690 ret = drm_simple_display_pipe_init(&gm12u320->dev, 691 &gm12u320->pipe, 692 &gm12u320_pipe_funcs, 693 gm12u320_pipe_formats, 694 ARRAY_SIZE(gm12u320_pipe_formats), 695 gm12u320_pipe_modifiers, 696 &gm12u320->conn); 697 if (ret) 698 goto err_put_device; 699 700 drm_mode_config_reset(dev); 701 702 usb_set_intfdata(interface, dev); 703 ret = drm_dev_register(dev, 0); 704 if (ret) 705 goto err_put_device; 706 707 drm_fbdev_generic_setup(dev, 0); 708 709 return 0; 710 711err_put_device: 712 put_device(gm12u320->dmadev); 713 return ret; 714} 715 716static void gm12u320_usb_disconnect(struct usb_interface *interface) 717{ 718 struct drm_device *dev = usb_get_intfdata(interface); 719 struct gm12u320_device *gm12u320 = to_gm12u320(dev); 720 721 put_device(gm12u320->dmadev); 722 gm12u320->dmadev = NULL; 723 drm_dev_unplug(dev); 724 drm_atomic_helper_shutdown(dev); 725} 726 727static __maybe_unused int gm12u320_suspend(struct usb_interface *interface, 728 pm_message_t message) 729{ 730 struct drm_device *dev = usb_get_intfdata(interface); 731 732 return drm_mode_config_helper_suspend(dev); 733} 734 735static __maybe_unused int gm12u320_resume(struct usb_interface *interface) 736{ 737 struct drm_device *dev = usb_get_intfdata(interface); 738 struct gm12u320_device *gm12u320 = to_gm12u320(dev); 739 740 gm12u320_set_ecomode(gm12u320); 741 742 return drm_mode_config_helper_resume(dev); 743} 744 745static const struct usb_device_id id_table[] = { 746 { USB_DEVICE(0x1de1, 0xc102) }, 747 {}, 748}; 749MODULE_DEVICE_TABLE(usb, id_table); 750 751static struct usb_driver gm12u320_usb_driver = { 752 .name = "gm12u320", 753 .probe = gm12u320_usb_probe, 754 .disconnect = gm12u320_usb_disconnect, 755 .id_table = id_table, 756#ifdef CONFIG_PM 757 .suspend = gm12u320_suspend, 758 .resume = gm12u320_resume, 759 .reset_resume = gm12u320_resume, 760#endif 761}; 762 763module_usb_driver(gm12u320_usb_driver); 764MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); 765MODULE_LICENSE("GPL"); 766