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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/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_modeset_helper_vtables.h>
23#include <drm/drm_probe_helper.h>
24#include <drm/drm_simple_kms_helper.h>
25#include <drm/drm_vblank.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 msecs_to_jiffies(200)
71#define DATA_TIMEOUT msecs_to_jiffies(1000)
72#define IDLE_TIMEOUT msecs_to_jiffies(2000)
73#define FIRST_FRAME_TIMEOUT msecs_to_jiffies(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 drm_simple_display_pipe pipe;
87 struct drm_connector conn;
88 struct usb_device *udev;
89 unsigned char *cmd_buf;
90 unsigned char *data_buf[GM12U320_BLOCK_COUNT];
91 bool pipe_enabled;
92 struct {
93 bool run;
94 struct workqueue_struct *workq;
95 struct work_struct work;
96 wait_queue_head_t waitq;
97 struct mutex lock;
98 struct drm_framebuffer *fb;
99 struct drm_rect rect;
100 } fb_update;
101};
102
103static const char cmd_data[CMD_SIZE] = {
104 0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00,
105 0x68, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x10, 0xff,
106 0x00, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x80, 0x00,
107 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
108};
109
110static const char cmd_draw[CMD_SIZE] = {
111 0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00,
112 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0xfe,
113 0x00, 0x00, 0x00, 0xc0, 0xd1, 0x05, 0x00, 0x40,
114 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00
115};
116
117static const char cmd_misc[CMD_SIZE] = {
118 0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00,
119 0x04, 0x00, 0x00, 0x00, 0x80, 0x01, 0x10, 0xfd,
120 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, 0x00,
121 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
122};
123
124static const char data_block_header[DATA_BLOCK_HEADER_SIZE] = {
125 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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 0xfb, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
134 0x00, 0x04, 0x15, 0x00, 0x00, 0xfc, 0x00, 0x00,
135 0x01, 0x00, 0x00, 0xdb
136};
137
138static const char data_last_block_header[DATA_BLOCK_HEADER_SIZE] = {
139 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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 0xfb, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
148 0x2a, 0x00, 0x20, 0x00, 0xc0, 0x0f, 0x00, 0x00,
149 0x01, 0x00, 0x00, 0xd7
150};
151
152static const char data_block_footer[DATA_BLOCK_FOOTER_SIZE] = {
153 0xfb, 0x14, 0x02, 0x20, 0x00, 0x00, 0x00, 0x00,
154 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
155 0x80, 0x00, 0x00, 0x4f
156};
157
158static int gm12u320_usb_alloc(struct gm12u320_device *gm12u320)
159{
160 int i, block_size;
161 const char *hdr;
162
163 gm12u320->cmd_buf = kmalloc(CMD_SIZE, GFP_KERNEL);
164 if (!gm12u320->cmd_buf)
165 return -ENOMEM;
166
167 for (i = 0; i < GM12U320_BLOCK_COUNT; i++) {
168 if (i == GM12U320_BLOCK_COUNT - 1) {
169 block_size = DATA_LAST_BLOCK_SIZE;
170 hdr = data_last_block_header;
171 } else {
172 block_size = DATA_BLOCK_SIZE;
173 hdr = data_block_header;
174 }
175
176 gm12u320->data_buf[i] = kzalloc(block_size, GFP_KERNEL);
177 if (!gm12u320->data_buf[i])
178 return -ENOMEM;
179
180 memcpy(gm12u320->data_buf[i], hdr, DATA_BLOCK_HEADER_SIZE);
181 memcpy(gm12u320->data_buf[i] +
182 (block_size - DATA_BLOCK_FOOTER_SIZE),
183 data_block_footer, DATA_BLOCK_FOOTER_SIZE);
184 }
185
186 gm12u320->fb_update.workq = create_singlethread_workqueue(DRIVER_NAME);
187 if (!gm12u320->fb_update.workq)
188 return -ENOMEM;
189
190 return 0;
191}
192
193static void gm12u320_usb_free(struct gm12u320_device *gm12u320)
194{
195 int i;
196
197 if (gm12u320->fb_update.workq)
198 destroy_workqueue(gm12u320->fb_update.workq);
199
200 for (i = 0; i < GM12U320_BLOCK_COUNT; i++)
201 kfree(gm12u320->data_buf[i]);
202
203 kfree(gm12u320->cmd_buf);
204}
205
206static int gm12u320_misc_request(struct gm12u320_device *gm12u320,
207 u8 req_a, u8 req_b,
208 u8 arg_a, u8 arg_b, u8 arg_c, u8 arg_d)
209{
210 int ret, len;
211
212 memcpy(gm12u320->cmd_buf, &cmd_misc, CMD_SIZE);
213 gm12u320->cmd_buf[20] = req_a;
214 gm12u320->cmd_buf[21] = req_b;
215 gm12u320->cmd_buf[22] = arg_a;
216 gm12u320->cmd_buf[23] = arg_b;
217 gm12u320->cmd_buf[24] = arg_c;
218 gm12u320->cmd_buf[25] = arg_d;
219
220 /* Send request */
221 ret = usb_bulk_msg(gm12u320->udev,
222 usb_sndbulkpipe(gm12u320->udev, MISC_SND_EPT),
223 gm12u320->cmd_buf, CMD_SIZE, &len, CMD_TIMEOUT);
224 if (ret || len != CMD_SIZE) {
225 GM12U320_ERR("Misc. req. error %d\n", ret);
226 return -EIO;
227 }
228
229 /* Read value */
230 ret = usb_bulk_msg(gm12u320->udev,
231 usb_rcvbulkpipe(gm12u320->udev, MISC_RCV_EPT),
232 gm12u320->cmd_buf, MISC_VALUE_SIZE, &len,
233 DATA_TIMEOUT);
234 if (ret || len != MISC_VALUE_SIZE) {
235 GM12U320_ERR("Misc. value error %d\n", ret);
236 return -EIO;
237 }
238 /* cmd_buf[0] now contains the read value, which we don't use */
239
240 /* Read status */
241 ret = usb_bulk_msg(gm12u320->udev,
242 usb_rcvbulkpipe(gm12u320->udev, MISC_RCV_EPT),
243 gm12u320->cmd_buf, READ_STATUS_SIZE, &len,
244 CMD_TIMEOUT);
245 if (ret || len != READ_STATUS_SIZE) {
246 GM12U320_ERR("Misc. status error %d\n", ret);
247 return -EIO;
248 }
249
250 return 0;
251}
252
253static void gm12u320_32bpp_to_24bpp_packed(u8 *dst, u8 *src, int len)
254{
255 while (len--) {
256 *dst++ = *src++;
257 *dst++ = *src++;
258 *dst++ = *src++;
259 src++;
260 }
261}
262
263static void gm12u320_copy_fb_to_blocks(struct gm12u320_device *gm12u320)
264{
265 int block, dst_offset, len, remain, ret, x1, x2, y1, y2;
266 struct drm_framebuffer *fb;
267 void *vaddr;
268 u8 *src;
269
270 mutex_lock(&gm12u320->fb_update.lock);
271
272 if (!gm12u320->fb_update.fb)
273 goto unlock;
274
275 fb = gm12u320->fb_update.fb;
276 x1 = gm12u320->fb_update.rect.x1;
277 x2 = gm12u320->fb_update.rect.x2;
278 y1 = gm12u320->fb_update.rect.y1;
279 y2 = gm12u320->fb_update.rect.y2;
280
281 vaddr = drm_gem_shmem_vmap(fb->obj[0]);
282 if (IS_ERR(vaddr)) {
283 GM12U320_ERR("failed to vmap fb: %ld\n", PTR_ERR(vaddr));
284 goto put_fb;
285 }
286
287 if (fb->obj[0]->import_attach) {
288 ret = dma_buf_begin_cpu_access(
289 fb->obj[0]->import_attach->dmabuf, DMA_FROM_DEVICE);
290 if (ret) {
291 GM12U320_ERR("dma_buf_begin_cpu_access err: %d\n", ret);
292 goto vunmap;
293 }
294 }
295
296 src = vaddr + y1 * fb->pitches[0] + x1 * 4;
297
298 x1 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2;
299 x2 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2;
300
301 for (; y1 < y2; y1++) {
302 remain = 0;
303 len = (x2 - x1) * 3;
304 dst_offset = (y1 * GM12U320_REAL_WIDTH + x1) * 3;
305 block = dst_offset / DATA_BLOCK_CONTENT_SIZE;
306 dst_offset %= DATA_BLOCK_CONTENT_SIZE;
307
308 if ((dst_offset + len) > DATA_BLOCK_CONTENT_SIZE) {
309 remain = dst_offset + len - DATA_BLOCK_CONTENT_SIZE;
310 len = DATA_BLOCK_CONTENT_SIZE - dst_offset;
311 }
312
313 dst_offset += DATA_BLOCK_HEADER_SIZE;
314 len /= 3;
315
316 gm12u320_32bpp_to_24bpp_packed(
317 gm12u320->data_buf[block] + dst_offset,
318 src, len);
319
320 if (remain) {
321 block++;
322 dst_offset = DATA_BLOCK_HEADER_SIZE;
323 gm12u320_32bpp_to_24bpp_packed(
324 gm12u320->data_buf[block] + dst_offset,
325 src + len * 4, remain / 3);
326 }
327 src += fb->pitches[0];
328 }
329
330 if (fb->obj[0]->import_attach) {
331 ret = dma_buf_end_cpu_access(fb->obj[0]->import_attach->dmabuf,
332 DMA_FROM_DEVICE);
333 if (ret)
334 GM12U320_ERR("dma_buf_end_cpu_access err: %d\n", ret);
335 }
336vunmap:
337 drm_gem_shmem_vunmap(fb->obj[0], vaddr);
338put_fb:
339 drm_framebuffer_put(fb);
340 gm12u320->fb_update.fb = NULL;
341unlock:
342 mutex_unlock(&gm12u320->fb_update.lock);
343}
344
345static void gm12u320_fb_update_work(struct work_struct *work)
346{
347 struct gm12u320_device *gm12u320 =
348 container_of(work, struct gm12u320_device, fb_update.work);
349 int draw_status_timeout = FIRST_FRAME_TIMEOUT;
350 int block, block_size, len;
351 int frame = 0;
352 int ret = 0;
353
354 while (gm12u320->fb_update.run) {
355 gm12u320_copy_fb_to_blocks(gm12u320);
356
357 for (block = 0; block < GM12U320_BLOCK_COUNT; block++) {
358 if (block == GM12U320_BLOCK_COUNT - 1)
359 block_size = DATA_LAST_BLOCK_SIZE;
360 else
361 block_size = DATA_BLOCK_SIZE;
362
363 /* Send data command to device */
364 memcpy(gm12u320->cmd_buf, cmd_data, CMD_SIZE);
365 gm12u320->cmd_buf[8] = block_size & 0xff;
366 gm12u320->cmd_buf[9] = block_size >> 8;
367 gm12u320->cmd_buf[20] = 0xfc - block * 4;
368 gm12u320->cmd_buf[21] = block | (frame << 7);
369
370 ret = usb_bulk_msg(gm12u320->udev,
371 usb_sndbulkpipe(gm12u320->udev, DATA_SND_EPT),
372 gm12u320->cmd_buf, CMD_SIZE, &len,
373 CMD_TIMEOUT);
374 if (ret || len != CMD_SIZE)
375 goto err;
376
377 /* Send data block to device */
378 ret = usb_bulk_msg(gm12u320->udev,
379 usb_sndbulkpipe(gm12u320->udev, DATA_SND_EPT),
380 gm12u320->data_buf[block], block_size,
381 &len, DATA_TIMEOUT);
382 if (ret || len != block_size)
383 goto err;
384
385 /* Read status */
386 ret = usb_bulk_msg(gm12u320->udev,
387 usb_rcvbulkpipe(gm12u320->udev, DATA_RCV_EPT),
388 gm12u320->cmd_buf, READ_STATUS_SIZE, &len,
389 CMD_TIMEOUT);
390 if (ret || len != READ_STATUS_SIZE)
391 goto err;
392 }
393
394 /* Send draw command to device */
395 memcpy(gm12u320->cmd_buf, cmd_draw, CMD_SIZE);
396 ret = usb_bulk_msg(gm12u320->udev,
397 usb_sndbulkpipe(gm12u320->udev, DATA_SND_EPT),
398 gm12u320->cmd_buf, CMD_SIZE, &len, CMD_TIMEOUT);
399 if (ret || len != CMD_SIZE)
400 goto err;
401
402 /* Read status */
403 ret = usb_bulk_msg(gm12u320->udev,
404 usb_rcvbulkpipe(gm12u320->udev, DATA_RCV_EPT),
405 gm12u320->cmd_buf, READ_STATUS_SIZE, &len,
406 draw_status_timeout);
407 if (ret || len != READ_STATUS_SIZE)
408 goto err;
409
410 draw_status_timeout = CMD_TIMEOUT;
411 frame = !frame;
412
413 /*
414 * We must draw a frame every 2s otherwise the projector
415 * switches back to showing its logo.
416 */
417 wait_event_timeout(gm12u320->fb_update.waitq,
418 !gm12u320->fb_update.run ||
419 gm12u320->fb_update.fb != NULL,
420 IDLE_TIMEOUT);
421 }
422 return;
423err:
424 /* Do not log errors caused by module unload or device unplug */
425 if (ret != -ENODEV && ret != -ECONNRESET && ret != -ESHUTDOWN)
426 GM12U320_ERR("Frame update error: %d\n", ret);
427}
428
429static void gm12u320_fb_mark_dirty(struct drm_framebuffer *fb,
430 struct drm_rect *dirty)
431{
432 struct gm12u320_device *gm12u320 = fb->dev->dev_private;
433 struct drm_framebuffer *old_fb = NULL;
434 bool wakeup = false;
435
436 mutex_lock(&gm12u320->fb_update.lock);
437
438 if (gm12u320->fb_update.fb != fb) {
439 old_fb = gm12u320->fb_update.fb;
440 drm_framebuffer_get(fb);
441 gm12u320->fb_update.fb = fb;
442 gm12u320->fb_update.rect = *dirty;
443 wakeup = true;
444 } else {
445 struct drm_rect *rect = &gm12u320->fb_update.rect;
446
447 rect->x1 = min(rect->x1, dirty->x1);
448 rect->y1 = min(rect->y1, dirty->y1);
449 rect->x2 = max(rect->x2, dirty->x2);
450 rect->y2 = max(rect->y2, dirty->y2);
451 }
452
453 mutex_unlock(&gm12u320->fb_update.lock);
454
455 if (wakeup)
456 wake_up(&gm12u320->fb_update.waitq);
457
458 if (old_fb)
459 drm_framebuffer_put(old_fb);
460}
461
462static void gm12u320_start_fb_update(struct gm12u320_device *gm12u320)
463{
464 mutex_lock(&gm12u320->fb_update.lock);
465 gm12u320->fb_update.run = true;
466 mutex_unlock(&gm12u320->fb_update.lock);
467
468 queue_work(gm12u320->fb_update.workq, &gm12u320->fb_update.work);
469}
470
471static void gm12u320_stop_fb_update(struct gm12u320_device *gm12u320)
472{
473 mutex_lock(&gm12u320->fb_update.lock);
474 gm12u320->fb_update.run = false;
475 mutex_unlock(&gm12u320->fb_update.lock);
476
477 wake_up(&gm12u320->fb_update.waitq);
478 cancel_work_sync(&gm12u320->fb_update.work);
479
480 mutex_lock(&gm12u320->fb_update.lock);
481 if (gm12u320->fb_update.fb) {
482 drm_framebuffer_put(gm12u320->fb_update.fb);
483 gm12u320->fb_update.fb = NULL;
484 }
485 mutex_unlock(&gm12u320->fb_update.lock);
486}
487
488static int gm12u320_set_ecomode(struct gm12u320_device *gm12u320)
489{
490 return gm12u320_misc_request(gm12u320, MISC_REQ_GET_SET_ECO_A,
491 MISC_REQ_GET_SET_ECO_B, 0x01 /* set */,
492 eco_mode ? 0x01 : 0x00, 0x00, 0x01);
493}
494
495/* ------------------------------------------------------------------ */
496/* gm12u320 connector */
497
498/*
499 *Â We use fake EDID info so that userspace know that it is dealing with
500 * an Acer projector, rather then listing this as an "unknown" monitor.
501 * Note this assumes this driver is only ever used with the Acer C120, if we
502 * add support for other devices the vendor and model should be parameterized.
503 */
504static struct edid gm12u320_edid = {
505 .header = { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 },
506 .mfg_id = { 0x04, 0x72 }, /* "ACR" */
507 .prod_code = { 0x20, 0xc1 }, /* C120h */
508 .serial = 0xaa55aa55,
509 .mfg_week = 1,
510 .mfg_year = 16,
511 .version = 1, /* EDID 1.3 */
512 .revision = 3, /* EDID 1.3 */
513 .input = 0x08, /* Analog input */
514 .features = 0x0a, /* Pref timing in DTD 1 */
515 .standard_timings = { { 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 },
516 { 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 } },
517 .detailed_timings = { {
518 .pixel_clock = 3383,
519 /* hactive = 848, hblank = 256 */
520 .data.pixel_data.hactive_lo = 0x50,
521 .data.pixel_data.hblank_lo = 0x00,
522 .data.pixel_data.hactive_hblank_hi = 0x31,
523 /* vactive = 480, vblank = 28 */
524 .data.pixel_data.vactive_lo = 0xe0,
525 .data.pixel_data.vblank_lo = 0x1c,
526 .data.pixel_data.vactive_vblank_hi = 0x10,
527 /* hsync offset 40 pw 128, vsync offset 1 pw 4 */
528 .data.pixel_data.hsync_offset_lo = 0x28,
529 .data.pixel_data.hsync_pulse_width_lo = 0x80,
530 .data.pixel_data.vsync_offset_pulse_width_lo = 0x14,
531 .data.pixel_data.hsync_vsync_offset_pulse_width_hi = 0x00,
532 /* Digital separate syncs, hsync+, vsync+ */
533 .data.pixel_data.misc = 0x1e,
534 }, {
535 .pixel_clock = 0,
536 .data.other_data.type = 0xfd, /* Monitor ranges */
537 .data.other_data.data.range.min_vfreq = 59,
538 .data.other_data.data.range.max_vfreq = 61,
539 .data.other_data.data.range.min_hfreq_khz = 29,
540 .data.other_data.data.range.max_hfreq_khz = 32,
541 .data.other_data.data.range.pixel_clock_mhz = 4, /* 40 MHz */
542 .data.other_data.data.range.flags = 0,
543 .data.other_data.data.range.formula.cvt = {
544 0xa0, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20 },
545 }, {
546 .pixel_clock = 0,
547 .data.other_data.type = 0xfc, /* Model string */
548 .data.other_data.data.str.str = {
549 'P', 'r', 'o', 'j', 'e', 'c', 't', 'o', 'r', '\n',
550 ' ', ' ', ' ' },
551 }, {
552 .pixel_clock = 0,
553 .data.other_data.type = 0xfe, /* Unspecified text / padding */
554 .data.other_data.data.str.str = {
555 '\n', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
556 ' ', ' ', ' ' },
557 } },
558 .checksum = 0x13,
559};
560
561static int gm12u320_conn_get_modes(struct drm_connector *connector)
562{
563 drm_connector_update_edid_property(connector, &gm12u320_edid);
564 return drm_add_edid_modes(connector, &gm12u320_edid);
565}
566
567static const struct drm_connector_helper_funcs gm12u320_conn_helper_funcs = {
568 .get_modes = gm12u320_conn_get_modes,
569};
570
571static const struct drm_connector_funcs gm12u320_conn_funcs = {
572 .fill_modes = drm_helper_probe_single_connector_modes,
573 .destroy = drm_connector_cleanup,
574 .reset = drm_atomic_helper_connector_reset,
575 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
576 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
577};
578
579static int gm12u320_conn_init(struct gm12u320_device *gm12u320)
580{
581 drm_connector_helper_add(&gm12u320->conn, &gm12u320_conn_helper_funcs);
582 return drm_connector_init(&gm12u320->dev, &gm12u320->conn,
583 &gm12u320_conn_funcs, DRM_MODE_CONNECTOR_VGA);
584}
585
586/* ------------------------------------------------------------------ */
587/* gm12u320 (simple) display pipe */
588
589static void gm12u320_pipe_enable(struct drm_simple_display_pipe *pipe,
590 struct drm_crtc_state *crtc_state,
591 struct drm_plane_state *plane_state)
592{
593 struct gm12u320_device *gm12u320 = pipe->crtc.dev->dev_private;
594 struct drm_rect rect = { 0, 0, GM12U320_USER_WIDTH, GM12U320_HEIGHT };
595
596 gm12u320_fb_mark_dirty(plane_state->fb, &rect);
597 gm12u320_start_fb_update(gm12u320);
598 gm12u320->pipe_enabled = true;
599}
600
601static void gm12u320_pipe_disable(struct drm_simple_display_pipe *pipe)
602{
603 struct gm12u320_device *gm12u320 = pipe->crtc.dev->dev_private;
604
605 gm12u320_stop_fb_update(gm12u320);
606 gm12u320->pipe_enabled = false;
607}
608
609static void gm12u320_pipe_update(struct drm_simple_display_pipe *pipe,
610 struct drm_plane_state *old_state)
611{
612 struct drm_plane_state *state = pipe->plane.state;
613 struct drm_crtc *crtc = &pipe->crtc;
614 struct drm_rect rect;
615
616 if (drm_atomic_helper_damage_merged(old_state, state, &rect))
617 gm12u320_fb_mark_dirty(pipe->plane.state->fb, &rect);
618
619 if (crtc->state->event) {
620 spin_lock_irq(&crtc->dev->event_lock);
621 drm_crtc_send_vblank_event(crtc, crtc->state->event);
622 crtc->state->event = NULL;
623 spin_unlock_irq(&crtc->dev->event_lock);
624 }
625}
626
627static const struct drm_simple_display_pipe_funcs gm12u320_pipe_funcs = {
628 .enable = gm12u320_pipe_enable,
629 .disable = gm12u320_pipe_disable,
630 .update = gm12u320_pipe_update,
631};
632
633static const uint32_t gm12u320_pipe_formats[] = {
634 DRM_FORMAT_XRGB8888,
635};
636
637static const uint64_t gm12u320_pipe_modifiers[] = {
638 DRM_FORMAT_MOD_LINEAR,
639 DRM_FORMAT_MOD_INVALID
640};
641
642static void gm12u320_driver_release(struct drm_device *dev)
643{
644 struct gm12u320_device *gm12u320 = dev->dev_private;
645
646 gm12u320_usb_free(gm12u320);
647 drm_mode_config_cleanup(dev);
648 drm_dev_fini(dev);
649 kfree(gm12u320);
650}
651
652DEFINE_DRM_GEM_SHMEM_FOPS(gm12u320_fops);
653
654static struct drm_driver gm12u320_drm_driver = {
655 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
656
657 .name = DRIVER_NAME,
658 .desc = DRIVER_DESC,
659 .date = DRIVER_DATE,
660 .major = DRIVER_MAJOR,
661 .minor = DRIVER_MINOR,
662
663 .release = gm12u320_driver_release,
664 .fops = &gm12u320_fops,
665 DRM_GEM_SHMEM_DRIVER_OPS,
666};
667
668static const struct drm_mode_config_funcs gm12u320_mode_config_funcs = {
669 .fb_create = drm_gem_fb_create_with_dirty,
670 .atomic_check = drm_atomic_helper_check,
671 .atomic_commit = drm_atomic_helper_commit,
672};
673
674static int gm12u320_usb_probe(struct usb_interface *interface,
675 const struct usb_device_id *id)
676{
677 struct gm12u320_device *gm12u320;
678 struct drm_device *dev;
679 int ret;
680
681 /*
682 * The gm12u320 presents itself to the system as 2 usb mass-storage
683 * interfaces, we only care about / need the first one.
684 */
685 if (interface->cur_altsetting->desc.bInterfaceNumber != 0)
686 return -ENODEV;
687
688 gm12u320 = kzalloc(sizeof(*gm12u320), GFP_KERNEL);
689 if (gm12u320 == NULL)
690 return -ENOMEM;
691
692 gm12u320->udev = interface_to_usbdev(interface);
693 INIT_WORK(&gm12u320->fb_update.work, gm12u320_fb_update_work);
694 mutex_init(&gm12u320->fb_update.lock);
695 init_waitqueue_head(&gm12u320->fb_update.waitq);
696
697 dev = &gm12u320->dev;
698 ret = drm_dev_init(dev, &gm12u320_drm_driver, &interface->dev);
699 if (ret) {
700 kfree(gm12u320);
701 return ret;
702 }
703 dev->dev_private = gm12u320;
704
705 drm_mode_config_init(dev);
706 dev->mode_config.min_width = GM12U320_USER_WIDTH;
707 dev->mode_config.max_width = GM12U320_USER_WIDTH;
708 dev->mode_config.min_height = GM12U320_HEIGHT;
709 dev->mode_config.max_height = GM12U320_HEIGHT;
710 dev->mode_config.funcs = &gm12u320_mode_config_funcs;
711
712 ret = gm12u320_usb_alloc(gm12u320);
713 if (ret)
714 goto err_put;
715
716 ret = gm12u320_set_ecomode(gm12u320);
717 if (ret)
718 goto err_put;
719
720 ret = gm12u320_conn_init(gm12u320);
721 if (ret)
722 goto err_put;
723
724 ret = drm_simple_display_pipe_init(&gm12u320->dev,
725 &gm12u320->pipe,
726 &gm12u320_pipe_funcs,
727 gm12u320_pipe_formats,
728 ARRAY_SIZE(gm12u320_pipe_formats),
729 gm12u320_pipe_modifiers,
730 &gm12u320->conn);
731 if (ret)
732 goto err_put;
733
734 drm_mode_config_reset(dev);
735
736 usb_set_intfdata(interface, dev);
737 ret = drm_dev_register(dev, 0);
738 if (ret)
739 goto err_put;
740
741 drm_fbdev_generic_setup(dev, 0);
742
743 return 0;
744
745err_put:
746 drm_dev_put(dev);
747 return ret;
748}
749
750static void gm12u320_usb_disconnect(struct usb_interface *interface)
751{
752 struct drm_device *dev = usb_get_intfdata(interface);
753 struct gm12u320_device *gm12u320 = dev->dev_private;
754
755 gm12u320_stop_fb_update(gm12u320);
756 drm_dev_unplug(dev);
757 drm_dev_put(dev);
758}
759
760static __maybe_unused int gm12u320_suspend(struct usb_interface *interface,
761 pm_message_t message)
762{
763 struct drm_device *dev = usb_get_intfdata(interface);
764 struct gm12u320_device *gm12u320 = dev->dev_private;
765
766 if (gm12u320->pipe_enabled)
767 gm12u320_stop_fb_update(gm12u320);
768
769 return 0;
770}
771
772static __maybe_unused int gm12u320_resume(struct usb_interface *interface)
773{
774 struct drm_device *dev = usb_get_intfdata(interface);
775 struct gm12u320_device *gm12u320 = dev->dev_private;
776
777 gm12u320_set_ecomode(gm12u320);
778 if (gm12u320->pipe_enabled)
779 gm12u320_start_fb_update(gm12u320);
780
781 return 0;
782}
783
784static const struct usb_device_id id_table[] = {
785 { USB_DEVICE(0x1de1, 0xc102) },
786 {},
787};
788MODULE_DEVICE_TABLE(usb, id_table);
789
790static struct usb_driver gm12u320_usb_driver = {
791 .name = "gm12u320",
792 .probe = gm12u320_usb_probe,
793 .disconnect = gm12u320_usb_disconnect,
794 .id_table = id_table,
795#ifdef CONFIG_PM
796 .suspend = gm12u320_suspend,
797 .resume = gm12u320_resume,
798 .reset_resume = gm12u320_resume,
799#endif
800};
801
802module_usb_driver(gm12u320_usb_driver);
803MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
804MODULE_LICENSE("GPL");