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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/pm.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_edid.h>16#include <drm/drm_fbdev_shmem.h>17#include <drm/drm_file.h>18#include <drm/drm_format_helper.h>19#include <drm/drm_fourcc.h>20#include <drm/drm_framebuffer.h>21#include <drm/drm_gem_atomic_helper.h>22#include <drm/drm_gem_framebuffer_helper.h>23#include <drm/drm_gem_shmem_helper.h>24#include <drm/drm_ioctl.h>25#include <drm/drm_managed.h>26#include <drm/drm_modeset_helper_vtables.h>27#include <drm/drm_probe_helper.h>28#include <drm/drm_simple_kms_helper.h>29 30static bool eco_mode;31module_param(eco_mode, bool, 0644);32MODULE_PARM_DESC(eco_mode, "Turn on Eco mode (less bright, more silent)");33 34#define DRIVER_NAME "gm12u320"35#define DRIVER_DESC "Grain Media GM12U320 USB projector display"36#define DRIVER_DATE "2019"37#define DRIVER_MAJOR 138#define DRIVER_MINOR 039 40/*41 * The DLP has an actual width of 854 pixels, but that is not a multiple42 * of 8, breaking things left and right, so we export a width of 848.43 */44#define GM12U320_USER_WIDTH 84845#define GM12U320_REAL_WIDTH 85446#define GM12U320_HEIGHT 48047 48#define GM12U320_BLOCK_COUNT 2049 50#define GM12U320_ERR(fmt, ...) \51 DRM_DEV_ERROR(gm12u320->dev.dev, fmt, ##__VA_ARGS__)52 53#define MISC_RCV_EPT 154#define DATA_RCV_EPT 255#define DATA_SND_EPT 356#define MISC_SND_EPT 457 58#define DATA_BLOCK_HEADER_SIZE 8459#define DATA_BLOCK_CONTENT_SIZE 6451260#define DATA_BLOCK_FOOTER_SIZE 2061#define DATA_BLOCK_SIZE (DATA_BLOCK_HEADER_SIZE + \62 DATA_BLOCK_CONTENT_SIZE + \63 DATA_BLOCK_FOOTER_SIZE)64#define DATA_LAST_BLOCK_CONTENT_SIZE 403265#define DATA_LAST_BLOCK_SIZE (DATA_BLOCK_HEADER_SIZE + \66 DATA_LAST_BLOCK_CONTENT_SIZE + \67 DATA_BLOCK_FOOTER_SIZE)68 69#define CMD_SIZE 3170#define READ_STATUS_SIZE 1371#define MISC_VALUE_SIZE 472 73#define CMD_TIMEOUT 20074#define DATA_TIMEOUT 100075#define IDLE_TIMEOUT 200076#define FIRST_FRAME_TIMEOUT 200077 78#define MISC_REQ_GET_SET_ECO_A 0xff79#define MISC_REQ_GET_SET_ECO_B 0x3580/* Windows driver does once every second, with arg d = 1, other args 0 */81#define MISC_REQ_UNKNOWN1_A 0xff82#define MISC_REQ_UNKNOWN1_B 0x3883/* Windows driver does this on init, with arg a, b = 0, c = 0xa0, d = 4 */84#define MISC_REQ_UNKNOWN2_A 0xa585#define MISC_REQ_UNKNOWN2_B 0x0086 87struct gm12u320_device {88 struct drm_device dev;89 struct device *dmadev;90 struct drm_simple_display_pipe pipe;91 struct drm_connector conn;92 unsigned char *cmd_buf;93 unsigned char *data_buf[GM12U320_BLOCK_COUNT];94 struct {95 struct delayed_work work;96 struct mutex lock;97 struct drm_framebuffer *fb;98 struct drm_rect rect;99 int frame;100 int draw_status_timeout;101 struct iosys_map src_map;102 } fb_update;103};104 105#define to_gm12u320(__dev) container_of(__dev, struct gm12u320_device, dev)106 107static const char cmd_data[CMD_SIZE] = {108 0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00,109 0x68, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x10, 0xff,110 0x00, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x80, 0x00,111 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00112};113 114static const char cmd_draw[CMD_SIZE] = {115 0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00,116 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0xfe,117 0x00, 0x00, 0x00, 0xc0, 0xd1, 0x05, 0x00, 0x40,118 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00119};120 121static const char cmd_misc[CMD_SIZE] = {122 0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00,123 0x04, 0x00, 0x00, 0x00, 0x80, 0x01, 0x10, 0xfd,124 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, 0x00,125 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00126};127 128static const char data_block_header[DATA_BLOCK_HEADER_SIZE] = {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 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,137 0xfb, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,138 0x00, 0x04, 0x15, 0x00, 0x00, 0xfc, 0x00, 0x00,139 0x01, 0x00, 0x00, 0xdb140};141 142static const char data_last_block_header[DATA_BLOCK_HEADER_SIZE] = {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 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,151 0xfb, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,152 0x2a, 0x00, 0x20, 0x00, 0xc0, 0x0f, 0x00, 0x00,153 0x01, 0x00, 0x00, 0xd7154};155 156static const char data_block_footer[DATA_BLOCK_FOOTER_SIZE] = {157 0xfb, 0x14, 0x02, 0x20, 0x00, 0x00, 0x00, 0x00,158 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,159 0x80, 0x00, 0x00, 0x4f160};161 162static inline struct usb_device *gm12u320_to_usb_device(struct gm12u320_device *gm12u320)163{164 return interface_to_usbdev(to_usb_interface(gm12u320->dev.dev));165}166 167static int gm12u320_usb_alloc(struct gm12u320_device *gm12u320)168{169 int i, block_size;170 const char *hdr;171 172 gm12u320->cmd_buf = drmm_kmalloc(&gm12u320->dev, CMD_SIZE, GFP_KERNEL);173 if (!gm12u320->cmd_buf)174 return -ENOMEM;175 176 for (i = 0; i < GM12U320_BLOCK_COUNT; i++) {177 if (i == GM12U320_BLOCK_COUNT - 1) {178 block_size = DATA_LAST_BLOCK_SIZE;179 hdr = data_last_block_header;180 } else {181 block_size = DATA_BLOCK_SIZE;182 hdr = data_block_header;183 }184 185 gm12u320->data_buf[i] = drmm_kzalloc(&gm12u320->dev,186 block_size, GFP_KERNEL);187 if (!gm12u320->data_buf[i])188 return -ENOMEM;189 190 memcpy(gm12u320->data_buf[i], hdr, DATA_BLOCK_HEADER_SIZE);191 memcpy(gm12u320->data_buf[i] +192 (block_size - DATA_BLOCK_FOOTER_SIZE),193 data_block_footer, DATA_BLOCK_FOOTER_SIZE);194 }195 196 return 0;197}198 199static int gm12u320_misc_request(struct gm12u320_device *gm12u320,200 u8 req_a, u8 req_b,201 u8 arg_a, u8 arg_b, u8 arg_c, u8 arg_d)202{203 struct usb_device *udev = gm12u320_to_usb_device(gm12u320);204 int ret, len;205 206 memcpy(gm12u320->cmd_buf, &cmd_misc, CMD_SIZE);207 gm12u320->cmd_buf[20] = req_a;208 gm12u320->cmd_buf[21] = req_b;209 gm12u320->cmd_buf[22] = arg_a;210 gm12u320->cmd_buf[23] = arg_b;211 gm12u320->cmd_buf[24] = arg_c;212 gm12u320->cmd_buf[25] = arg_d;213 214 /* Send request */215 ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, MISC_SND_EPT),216 gm12u320->cmd_buf, CMD_SIZE, &len, CMD_TIMEOUT);217 if (ret || len != CMD_SIZE) {218 GM12U320_ERR("Misc. req. error %d\n", ret);219 return -EIO;220 }221 222 /* Read value */223 ret = usb_bulk_msg(udev, usb_rcvbulkpipe(udev, MISC_RCV_EPT),224 gm12u320->cmd_buf, MISC_VALUE_SIZE, &len,225 DATA_TIMEOUT);226 if (ret || len != MISC_VALUE_SIZE) {227 GM12U320_ERR("Misc. value error %d\n", ret);228 return -EIO;229 }230 /* cmd_buf[0] now contains the read value, which we don't use */231 232 /* Read status */233 ret = usb_bulk_msg(udev, usb_rcvbulkpipe(udev, MISC_RCV_EPT),234 gm12u320->cmd_buf, READ_STATUS_SIZE, &len,235 CMD_TIMEOUT);236 if (ret || len != READ_STATUS_SIZE) {237 GM12U320_ERR("Misc. status error %d\n", ret);238 return -EIO;239 }240 241 return 0;242}243 244static void gm12u320_32bpp_to_24bpp_packed(u8 *dst, u8 *src, int len)245{246 while (len--) {247 *dst++ = *src++;248 *dst++ = *src++;249 *dst++ = *src++;250 src++;251 }252}253 254static void gm12u320_copy_fb_to_blocks(struct gm12u320_device *gm12u320)255{256 int block, dst_offset, len, remain, ret, x1, x2, y1, y2;257 struct drm_framebuffer *fb;258 void *vaddr;259 u8 *src;260 261 mutex_lock(&gm12u320->fb_update.lock);262 263 if (!gm12u320->fb_update.fb)264 goto unlock;265 266 fb = gm12u320->fb_update.fb;267 x1 = gm12u320->fb_update.rect.x1;268 x2 = gm12u320->fb_update.rect.x2;269 y1 = gm12u320->fb_update.rect.y1;270 y2 = gm12u320->fb_update.rect.y2;271 vaddr = gm12u320->fb_update.src_map.vaddr; /* TODO: Use mapping abstraction properly */272 273 ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);274 if (ret) {275 GM12U320_ERR("drm_gem_fb_begin_cpu_access err: %d\n", ret);276 goto put_fb;277 }278 279 src = vaddr + y1 * fb->pitches[0] + x1 * 4;280 281 x1 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2;282 x2 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2;283 284 for (; y1 < y2; y1++) {285 remain = 0;286 len = (x2 - x1) * 3;287 dst_offset = (y1 * GM12U320_REAL_WIDTH + x1) * 3;288 block = dst_offset / DATA_BLOCK_CONTENT_SIZE;289 dst_offset %= DATA_BLOCK_CONTENT_SIZE;290 291 if ((dst_offset + len) > DATA_BLOCK_CONTENT_SIZE) {292 remain = dst_offset + len - DATA_BLOCK_CONTENT_SIZE;293 len = DATA_BLOCK_CONTENT_SIZE - dst_offset;294 }295 296 dst_offset += DATA_BLOCK_HEADER_SIZE;297 len /= 3;298 299 gm12u320_32bpp_to_24bpp_packed(300 gm12u320->data_buf[block] + dst_offset,301 src, len);302 303 if (remain) {304 block++;305 dst_offset = DATA_BLOCK_HEADER_SIZE;306 gm12u320_32bpp_to_24bpp_packed(307 gm12u320->data_buf[block] + dst_offset,308 src + len * 4, remain / 3);309 }310 src += fb->pitches[0];311 }312 313 drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);314put_fb:315 drm_framebuffer_put(fb);316 gm12u320->fb_update.fb = NULL;317unlock:318 mutex_unlock(&gm12u320->fb_update.lock);319}320 321static void gm12u320_fb_update_work(struct work_struct *work)322{323 struct gm12u320_device *gm12u320 =324 container_of(to_delayed_work(work), struct gm12u320_device,325 fb_update.work);326 struct usb_device *udev = gm12u320_to_usb_device(gm12u320);327 int block, block_size, len;328 int ret = 0;329 330 gm12u320_copy_fb_to_blocks(gm12u320);331 332 for (block = 0; block < GM12U320_BLOCK_COUNT; block++) {333 if (block == GM12U320_BLOCK_COUNT - 1)334 block_size = DATA_LAST_BLOCK_SIZE;335 else336 block_size = DATA_BLOCK_SIZE;337 338 /* Send data command to device */339 memcpy(gm12u320->cmd_buf, cmd_data, CMD_SIZE);340 gm12u320->cmd_buf[8] = block_size & 0xff;341 gm12u320->cmd_buf[9] = block_size >> 8;342 gm12u320->cmd_buf[20] = 0xfc - block * 4;343 gm12u320->cmd_buf[21] =344 block | (gm12u320->fb_update.frame << 7);345 346 ret = usb_bulk_msg(udev,347 usb_sndbulkpipe(udev, DATA_SND_EPT),348 gm12u320->cmd_buf, CMD_SIZE, &len,349 CMD_TIMEOUT);350 if (ret || len != CMD_SIZE)351 goto err;352 353 /* Send data block to device */354 ret = usb_bulk_msg(udev,355 usb_sndbulkpipe(udev, DATA_SND_EPT),356 gm12u320->data_buf[block], block_size,357 &len, DATA_TIMEOUT);358 if (ret || len != block_size)359 goto err;360 361 /* Read status */362 ret = usb_bulk_msg(udev,363 usb_rcvbulkpipe(udev, DATA_RCV_EPT),364 gm12u320->cmd_buf, READ_STATUS_SIZE, &len,365 CMD_TIMEOUT);366 if (ret || len != READ_STATUS_SIZE)367 goto err;368 }369 370 /* Send draw command to device */371 memcpy(gm12u320->cmd_buf, cmd_draw, CMD_SIZE);372 ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, DATA_SND_EPT),373 gm12u320->cmd_buf, CMD_SIZE, &len, CMD_TIMEOUT);374 if (ret || len != CMD_SIZE)375 goto err;376 377 /* Read status */378 ret = usb_bulk_msg(udev, usb_rcvbulkpipe(udev, DATA_RCV_EPT),379 gm12u320->cmd_buf, READ_STATUS_SIZE, &len,380 gm12u320->fb_update.draw_status_timeout);381 if (ret || len != READ_STATUS_SIZE)382 goto err;383 384 gm12u320->fb_update.draw_status_timeout = CMD_TIMEOUT;385 gm12u320->fb_update.frame = !gm12u320->fb_update.frame;386 387 /*388 * We must draw a frame every 2s otherwise the projector389 * switches back to showing its logo.390 */391 queue_delayed_work(system_long_wq, &gm12u320->fb_update.work,392 msecs_to_jiffies(IDLE_TIMEOUT));393 394 return;395err:396 /* Do not log errors caused by module unload or device unplug */397 if (ret != -ENODEV && ret != -ECONNRESET && ret != -ESHUTDOWN)398 GM12U320_ERR("Frame update error: %d\n", ret);399}400 401static void gm12u320_fb_mark_dirty(struct drm_framebuffer *fb,402 const struct iosys_map *map,403 struct drm_rect *dirty)404{405 struct gm12u320_device *gm12u320 = to_gm12u320(fb->dev);406 struct drm_framebuffer *old_fb = NULL;407 bool wakeup = false;408 409 mutex_lock(&gm12u320->fb_update.lock);410 411 if (gm12u320->fb_update.fb != fb) {412 old_fb = gm12u320->fb_update.fb;413 drm_framebuffer_get(fb);414 gm12u320->fb_update.fb = fb;415 gm12u320->fb_update.rect = *dirty;416 gm12u320->fb_update.src_map = *map;417 wakeup = true;418 } else {419 struct drm_rect *rect = &gm12u320->fb_update.rect;420 421 rect->x1 = min(rect->x1, dirty->x1);422 rect->y1 = min(rect->y1, dirty->y1);423 rect->x2 = max(rect->x2, dirty->x2);424 rect->y2 = max(rect->y2, dirty->y2);425 }426 427 mutex_unlock(&gm12u320->fb_update.lock);428 429 if (wakeup)430 mod_delayed_work(system_long_wq, &gm12u320->fb_update.work, 0);431 432 if (old_fb)433 drm_framebuffer_put(old_fb);434}435 436static void gm12u320_stop_fb_update(struct gm12u320_device *gm12u320)437{438 struct drm_framebuffer *old_fb;439 440 cancel_delayed_work_sync(&gm12u320->fb_update.work);441 442 mutex_lock(&gm12u320->fb_update.lock);443 old_fb = gm12u320->fb_update.fb;444 gm12u320->fb_update.fb = NULL;445 iosys_map_clear(&gm12u320->fb_update.src_map);446 mutex_unlock(&gm12u320->fb_update.lock);447 448 drm_framebuffer_put(old_fb);449}450 451static int gm12u320_set_ecomode(struct gm12u320_device *gm12u320)452{453 return gm12u320_misc_request(gm12u320, MISC_REQ_GET_SET_ECO_A,454 MISC_REQ_GET_SET_ECO_B, 0x01 /* set */,455 eco_mode ? 0x01 : 0x00, 0x00, 0x01);456}457 458/* ------------------------------------------------------------------ */459/* gm12u320 connector */460 461/*462 * We use fake EDID info so that userspace know that it is dealing with463 * an Acer projector, rather then listing this as an "unknown" monitor.464 * Note this assumes this driver is only ever used with the Acer C120, if we465 * add support for other devices the vendor and model should be parameterized.466 */467static const struct edid gm12u320_edid = {468 .header = { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 },469 .mfg_id = { 0x04, 0x72 }, /* "ACR" */470 .prod_code = { 0x20, 0xc1 }, /* C120h */471 .serial = 0xaa55aa55,472 .mfg_week = 1,473 .mfg_year = 16,474 .version = 1, /* EDID 1.3 */475 .revision = 3, /* EDID 1.3 */476 .input = 0x08, /* Analog input */477 .features = 0x0a, /* Pref timing in DTD 1 */478 .standard_timings = { { 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 },479 { 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 } },480 .detailed_timings = { {481 .pixel_clock = 3383,482 /* hactive = 848, hblank = 256 */483 .data.pixel_data.hactive_lo = 0x50,484 .data.pixel_data.hblank_lo = 0x00,485 .data.pixel_data.hactive_hblank_hi = 0x31,486 /* vactive = 480, vblank = 28 */487 .data.pixel_data.vactive_lo = 0xe0,488 .data.pixel_data.vblank_lo = 0x1c,489 .data.pixel_data.vactive_vblank_hi = 0x10,490 /* hsync offset 40 pw 128, vsync offset 1 pw 4 */491 .data.pixel_data.hsync_offset_lo = 0x28,492 .data.pixel_data.hsync_pulse_width_lo = 0x80,493 .data.pixel_data.vsync_offset_pulse_width_lo = 0x14,494 .data.pixel_data.hsync_vsync_offset_pulse_width_hi = 0x00,495 /* Digital separate syncs, hsync+, vsync+ */496 .data.pixel_data.misc = 0x1e,497 }, {498 .pixel_clock = 0,499 .data.other_data.type = 0xfd, /* Monitor ranges */500 .data.other_data.data.range.min_vfreq = 59,501 .data.other_data.data.range.max_vfreq = 61,502 .data.other_data.data.range.min_hfreq_khz = 29,503 .data.other_data.data.range.max_hfreq_khz = 32,504 .data.other_data.data.range.pixel_clock_mhz = 4, /* 40 MHz */505 .data.other_data.data.range.flags = 0,506 .data.other_data.data.range.formula.cvt = {507 0xa0, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20 },508 }, {509 .pixel_clock = 0,510 .data.other_data.type = 0xfc, /* Model string */511 .data.other_data.data.str.str = {512 'P', 'r', 'o', 'j', 'e', 'c', 't', 'o', 'r', '\n',513 ' ', ' ', ' ' },514 }, {515 .pixel_clock = 0,516 .data.other_data.type = 0xfe, /* Unspecified text / padding */517 .data.other_data.data.str.str = {518 '\n', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',519 ' ', ' ', ' ' },520 } },521 .checksum = 0x13,522};523 524static int gm12u320_conn_get_modes(struct drm_connector *connector)525{526 const struct drm_edid *drm_edid;527 int count;528 529 drm_edid = drm_edid_alloc(&gm12u320_edid, sizeof(gm12u320_edid));530 drm_edid_connector_update(connector, drm_edid);531 count = drm_edid_connector_add_modes(connector);532 drm_edid_free(drm_edid);533 534 return count;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 struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);566 567 gm12u320->fb_update.draw_status_timeout = FIRST_FRAME_TIMEOUT;568 gm12u320_fb_mark_dirty(plane_state->fb, &shadow_plane_state->data[0], &rect);569}570 571static void gm12u320_pipe_disable(struct drm_simple_display_pipe *pipe)572{573 struct gm12u320_device *gm12u320 = to_gm12u320(pipe->crtc.dev);574 575 gm12u320_stop_fb_update(gm12u320);576}577 578static void gm12u320_pipe_update(struct drm_simple_display_pipe *pipe,579 struct drm_plane_state *old_state)580{581 struct drm_plane_state *state = pipe->plane.state;582 struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(state);583 struct drm_rect rect;584 585 if (drm_atomic_helper_damage_merged(old_state, state, &rect))586 gm12u320_fb_mark_dirty(state->fb, &shadow_plane_state->data[0], &rect);587}588 589static const struct drm_simple_display_pipe_funcs gm12u320_pipe_funcs = {590 .enable = gm12u320_pipe_enable,591 .disable = gm12u320_pipe_disable,592 .update = gm12u320_pipe_update,593 DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS,594};595 596static const uint32_t gm12u320_pipe_formats[] = {597 DRM_FORMAT_XRGB8888,598};599 600static const uint64_t gm12u320_pipe_modifiers[] = {601 DRM_FORMAT_MOD_LINEAR,602 DRM_FORMAT_MOD_INVALID603};604 605/*606 * FIXME: Dma-buf sharing requires DMA support by the importing device.607 * This function is a workaround to make USB devices work as well.608 * See todo.rst for how to fix the issue in the dma-buf framework.609 */610static struct drm_gem_object *gm12u320_gem_prime_import(struct drm_device *dev,611 struct dma_buf *dma_buf)612{613 struct gm12u320_device *gm12u320 = to_gm12u320(dev);614 615 if (!gm12u320->dmadev)616 return ERR_PTR(-ENODEV);617 618 return drm_gem_prime_import_dev(dev, dma_buf, gm12u320->dmadev);619}620 621DEFINE_DRM_GEM_FOPS(gm12u320_fops);622 623static const struct drm_driver gm12u320_drm_driver = {624 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,625 626 .name = DRIVER_NAME,627 .desc = DRIVER_DESC,628 .date = DRIVER_DATE,629 .major = DRIVER_MAJOR,630 .minor = DRIVER_MINOR,631 632 .fops = &gm12u320_fops,633 DRM_GEM_SHMEM_DRIVER_OPS,634 .gem_prime_import = gm12u320_gem_prime_import,635};636 637static const struct drm_mode_config_funcs gm12u320_mode_config_funcs = {638 .fb_create = drm_gem_fb_create_with_dirty,639 .atomic_check = drm_atomic_helper_check,640 .atomic_commit = drm_atomic_helper_commit,641};642 643static int gm12u320_usb_probe(struct usb_interface *interface,644 const struct usb_device_id *id)645{646 struct gm12u320_device *gm12u320;647 struct drm_device *dev;648 int ret;649 650 /*651 * The gm12u320 presents itself to the system as 2 usb mass-storage652 * interfaces, we only care about / need the first one.653 */654 if (interface->cur_altsetting->desc.bInterfaceNumber != 0)655 return -ENODEV;656 657 gm12u320 = devm_drm_dev_alloc(&interface->dev, &gm12u320_drm_driver,658 struct gm12u320_device, dev);659 if (IS_ERR(gm12u320))660 return PTR_ERR(gm12u320);661 dev = &gm12u320->dev;662 663 gm12u320->dmadev = usb_intf_get_dma_device(to_usb_interface(dev->dev));664 if (!gm12u320->dmadev)665 drm_warn(dev, "buffer sharing not supported"); /* not an error */666 667 INIT_DELAYED_WORK(&gm12u320->fb_update.work, gm12u320_fb_update_work);668 mutex_init(&gm12u320->fb_update.lock);669 670 ret = drmm_mode_config_init(dev);671 if (ret)672 goto err_put_device;673 674 dev->mode_config.min_width = GM12U320_USER_WIDTH;675 dev->mode_config.max_width = GM12U320_USER_WIDTH;676 dev->mode_config.min_height = GM12U320_HEIGHT;677 dev->mode_config.max_height = GM12U320_HEIGHT;678 dev->mode_config.funcs = &gm12u320_mode_config_funcs;679 680 ret = gm12u320_usb_alloc(gm12u320);681 if (ret)682 goto err_put_device;683 684 ret = gm12u320_set_ecomode(gm12u320);685 if (ret)686 goto err_put_device;687 688 ret = gm12u320_conn_init(gm12u320);689 if (ret)690 goto err_put_device;691 692 ret = drm_simple_display_pipe_init(&gm12u320->dev,693 &gm12u320->pipe,694 &gm12u320_pipe_funcs,695 gm12u320_pipe_formats,696 ARRAY_SIZE(gm12u320_pipe_formats),697 gm12u320_pipe_modifiers,698 &gm12u320->conn);699 if (ret)700 goto err_put_device;701 702 drm_mode_config_reset(dev);703 704 usb_set_intfdata(interface, dev);705 ret = drm_dev_register(dev, 0);706 if (ret)707 goto err_put_device;708 709 drm_fbdev_shmem_setup(dev, 0);710 711 return 0;712 713err_put_device:714 put_device(gm12u320->dmadev);715 return ret;716}717 718static void gm12u320_usb_disconnect(struct usb_interface *interface)719{720 struct drm_device *dev = usb_get_intfdata(interface);721 struct gm12u320_device *gm12u320 = to_gm12u320(dev);722 723 put_device(gm12u320->dmadev);724 gm12u320->dmadev = NULL;725 drm_dev_unplug(dev);726 drm_atomic_helper_shutdown(dev);727}728 729static int gm12u320_suspend(struct usb_interface *interface,730 pm_message_t message)731{732 struct drm_device *dev = usb_get_intfdata(interface);733 734 return drm_mode_config_helper_suspend(dev);735}736 737static int gm12u320_resume(struct usb_interface *interface)738{739 struct drm_device *dev = usb_get_intfdata(interface);740 struct gm12u320_device *gm12u320 = to_gm12u320(dev);741 742 gm12u320_set_ecomode(gm12u320);743 744 return drm_mode_config_helper_resume(dev);745}746 747static const struct usb_device_id id_table[] = {748 { USB_DEVICE(0x1de1, 0xc102) },749 {},750};751MODULE_DEVICE_TABLE(usb, id_table);752 753static struct usb_driver gm12u320_usb_driver = {754 .name = "gm12u320",755 .probe = gm12u320_usb_probe,756 .disconnect = gm12u320_usb_disconnect,757 .id_table = id_table,758 .suspend = pm_ptr(gm12u320_suspend),759 .resume = pm_ptr(gm12u320_resume),760 .reset_resume = pm_ptr(gm12u320_resume),761};762 763module_usb_driver(gm12u320_usb_driver);764MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");765MODULE_DESCRIPTION("GM12U320 driver for USB projectors");766MODULE_LICENSE("GPL");767