153 static int gud_usb_transfer(struct gud_device *gdrm, bool in, u8 request, u16 index,  in gud_usb_transfer()  argument
156 	struct usb_interface *intf = to_usb_interface(gdrm->drm.dev);  in gud_usb_transfer()
159 	drm_dbg(&gdrm->drm, "%s: request=0x%x index=%u len=%zu\n",  in gud_usb_transfer()
162 	if (!drm_dev_enter(&gdrm->drm, &idx))  in gud_usb_transfer()
165 	mutex_lock(&gdrm->ctrl_lock);  in gud_usb_transfer()
168 	if (ret == -EPIPE || ((gdrm->flags & GUD_DISPLAY_FLAG_STATUS_ON_SET) && !in && ret >= 0)) {  in gud_usb_transfer()
175 			dev_err_once(gdrm->drm.dev,  in gud_usb_transfer()
182 		drm_dbg(&gdrm->drm, "ret=%d\n", ret);  in gud_usb_transfer()
183 		gdrm->stats_num_errors++;  in gud_usb_transfer()
186 	mutex_unlock(&gdrm->ctrl_lock);  in gud_usb_transfer()
196 int gud_usb_get(struct gud_device *gdrm, u8 request, u16 index, void *buf, size_t max_len)  in gud_usb_get()  argument
198 	return gud_usb_transfer(gdrm, true, request, index, buf, max_len);  in gud_usb_get()
205 int gud_usb_set(struct gud_device *gdrm, u8 request, u16 index, void *buf, size_t len)  in gud_usb_set()  argument
216 	ret = gud_usb_transfer(gdrm, false, request, index, trbuf, len);  in gud_usb_set()
228 int gud_usb_get_u8(struct gud_device *gdrm, u8 request, u16 index, u8 *val)  in gud_usb_get_u8()  argument
237 	ret = gud_usb_get(gdrm, request, index, buf, sizeof(*val));  in gud_usb_get_u8()
247 int gud_usb_set_u8(struct gud_device *gdrm, u8 request, u8 val)  in gud_usb_set_u8()  argument
249 	return gud_usb_set(gdrm, request, 0, &val, sizeof(val));  in gud_usb_set_u8()
252 static int gud_get_properties(struct gud_device *gdrm)  in gud_get_properties()  argument
262 	ret = gud_usb_get(gdrm, GUD_REQ_GET_PROPERTIES, 0,  in gud_get_properties()
274 	gdrm->properties = drmm_kcalloc(&gdrm->drm, num_properties, sizeof(*gdrm->properties),  in gud_get_properties()
276 	if (!gdrm->properties) {  in gud_get_properties()
292 			ret = drm_plane_create_rotation_property(&gdrm->pipe.plane,  in gud_get_properties()
297 			drm_dbg(&gdrm->drm, "Ignoring unknown property: %u\n", prop);  in gud_get_properties()
304 		gdrm->properties[gdrm->num_properties++] = prop;  in gud_get_properties()
319 	struct gud_device *gdrm = to_gud_device(drm);  in gud_gem_prime_import()  local
321 	if (!gdrm->dmadev)  in gud_gem_prime_import()
324 	return drm_gem_prime_import_dev(drm, dma_buf, gdrm->dmadev);  in gud_gem_prime_import()
330 	struct gud_device *gdrm = to_gud_device(entry->dev);  in gud_stats_debugfs()  local
333 	string_get_size(gdrm->bulk_len, 1, STRING_UNITS_2, buf, sizeof(buf));  in gud_stats_debugfs()
335 	seq_printf(m, "Number of errors:  %u\n", gdrm->stats_num_errors);  in gud_stats_debugfs()
338 	if (gdrm->compression & GUD_COMPRESSION_LZ4)  in gud_stats_debugfs()
340 	if (!gdrm->compression)  in gud_stats_debugfs()
344 	if (gdrm->compression) {  in gud_stats_debugfs()
346 		u64 ratio = div64_u64_rem(gdrm->stats_length, gdrm->stats_actual_length,  in gud_stats_debugfs()
348 		u64 ratio_frac = div64_u64(remainder * 10, gdrm->stats_actual_length);  in gud_stats_debugfs()
388 static int gud_alloc_bulk_buffer(struct gud_device *gdrm)  in gud_alloc_bulk_buffer()  argument
395 	gdrm->bulk_buf = vmalloc_32(gdrm->bulk_len);  in gud_alloc_bulk_buffer()
396 	if (!gdrm->bulk_buf)  in gud_alloc_bulk_buffer()
399 	num_pages = DIV_ROUND_UP(gdrm->bulk_len, PAGE_SIZE);  in gud_alloc_bulk_buffer()
404 	for (i = 0, ptr = gdrm->bulk_buf; i < num_pages; i++, ptr += PAGE_SIZE)  in gud_alloc_bulk_buffer()
407 	ret = sg_alloc_table_from_pages(&gdrm->bulk_sgt, pages, num_pages,  in gud_alloc_bulk_buffer()
408 					0, gdrm->bulk_len, GFP_KERNEL);  in gud_alloc_bulk_buffer()
416 	struct gud_device *gdrm = data;  in gud_free_buffers_and_mutex()  local
418 	vfree(gdrm->compress_buf);  in gud_free_buffers_and_mutex()
419 	gdrm->compress_buf = NULL;  in gud_free_buffers_and_mutex()
420 	sg_free_table(&gdrm->bulk_sgt);  in gud_free_buffers_and_mutex()
421 	vfree(gdrm->bulk_buf);  in gud_free_buffers_and_mutex()
422 	gdrm->bulk_buf = NULL;  in gud_free_buffers_and_mutex()
423 	mutex_destroy(&gdrm->ctrl_lock);  in gud_free_buffers_and_mutex()
435 	struct gud_device *gdrm;  in gud_probe()  local
456 	gdrm = devm_drm_dev_alloc(dev, &gud_drm_driver, struct gud_device, drm);  in gud_probe()
457 	if (IS_ERR(gdrm))  in gud_probe()
458 		return PTR_ERR(gdrm);  in gud_probe()
460 	drm = &gdrm->drm;  in gud_probe()
466 	gdrm->flags = le32_to_cpu(desc.flags);  in gud_probe()
467 	gdrm->compression = desc.compression & GUD_COMPRESSION_LZ4;  in gud_probe()
469 	if (gdrm->flags & GUD_DISPLAY_FLAG_FULL_UPDATE && gdrm->compression)  in gud_probe()
472 	mutex_init(&gdrm->ctrl_lock);  in gud_probe()
473 	mutex_init(&gdrm->damage_lock);  in gud_probe()
474 	INIT_WORK(&gdrm->work, gud_flush_work);  in gud_probe()
475 	gud_clear_damage(gdrm);  in gud_probe()
477 	ret = devm_add_action(dev, gud_free_buffers_and_mutex, gdrm);  in gud_probe()
492 	ret = gud_usb_get(gdrm, GUD_REQ_GET_FORMATS, 0, formats_dev, GUD_FORMATS_MAX_NUM);  in gud_probe()
558 		gdrm->xrgb8888_emulation_format = xrgb8888_emulation_format;  in gud_probe()
568 	gdrm->bulk_pipe = usb_sndbulkpipe(interface_to_usbdev(intf), usb_endpoint_num(bulk_out));  in gud_probe()
569 	gdrm->bulk_len = max_buffer_size;  in gud_probe()
571 	ret = gud_alloc_bulk_buffer(gdrm);  in gud_probe()
575 	if (gdrm->compression & GUD_COMPRESSION_LZ4) {  in gud_probe()
576 		gdrm->lz4_comp_mem = devm_kmalloc(dev, LZ4_MEM_COMPRESS, GFP_KERNEL);  in gud_probe()
577 		if (!gdrm->lz4_comp_mem)  in gud_probe()
580 		gdrm->compress_buf = vmalloc(gdrm->bulk_len);  in gud_probe()
581 		if (!gdrm->compress_buf)  in gud_probe()
585 	ret = drm_simple_display_pipe_init(drm, &gdrm->pipe, &gud_pipe_funcs,  in gud_probe()
594 	ret = gud_get_properties(gdrm);  in gud_probe()
600 	drm_plane_enable_fb_damage_clips(&gdrm->pipe.plane);  in gud_probe()
602 	ret = gud_get_connectors(gdrm);  in gud_probe()
610 	usb_set_intfdata(intf, gdrm);  in gud_probe()
612 	gdrm->dmadev = usb_intf_get_dma_device(intf);  in gud_probe()
613 	if (!gdrm->dmadev)  in gud_probe()
620 		put_device(gdrm->dmadev);  in gud_probe()
633 	struct gud_device *gdrm = usb_get_intfdata(interface);  in gud_disconnect()  local
634 	struct drm_device *drm = &gdrm->drm;  in gud_disconnect()
641 	put_device(gdrm->dmadev);  in gud_disconnect()
642 	gdrm->dmadev = NULL;  in gud_disconnect()
647 	struct gud_device *gdrm = usb_get_intfdata(intf);  in gud_suspend()  local
649 	return drm_mode_config_helper_suspend(&gdrm->drm);  in gud_suspend()
654 	struct gud_device *gdrm = usb_get_intfdata(intf);  in gud_resume()  local
656 	drm_mode_config_helper_resume(&gdrm->drm);  in gud_resume()