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76c56a5a DR |
1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* | |
3 | * Copyright 2021 Microsoft | |
4 | * | |
5 | * Portions of this code is derived from hyperv_fb.c | |
6 | */ | |
7 | ||
8 | #include <linux/hyperv.h> | |
9 | ||
10 | #include <drm/drm_print.h> | |
11 | #include <drm/drm_simple_kms_helper.h> | |
12 | ||
13 | #include "hyperv_drm.h" | |
14 | ||
15 | #define VMBUS_RING_BUFSIZE (256 * 1024) | |
16 | #define VMBUS_VSP_TIMEOUT (10 * HZ) | |
17 | ||
18 | #define SYNTHVID_VERSION(major, minor) ((minor) << 16 | (major)) | |
19 | #define SYNTHVID_VER_GET_MAJOR(ver) (ver & 0x0000ffff) | |
20 | #define SYNTHVID_VER_GET_MINOR(ver) ((ver & 0xffff0000) >> 16) | |
ac6811a9 MK |
21 | |
22 | /* Support for VERSION_WIN7 is removed. #define is retained for reference. */ | |
76c56a5a DR |
23 | #define SYNTHVID_VERSION_WIN7 SYNTHVID_VERSION(3, 0) |
24 | #define SYNTHVID_VERSION_WIN8 SYNTHVID_VERSION(3, 2) | |
25 | #define SYNTHVID_VERSION_WIN10 SYNTHVID_VERSION(3, 5) | |
26 | ||
76c56a5a | 27 | #define SYNTHVID_DEPTH_WIN8 32 |
ac6811a9 MK |
28 | #define SYNTHVID_WIDTH_WIN8 1600 |
29 | #define SYNTHVID_HEIGHT_WIN8 1200 | |
76c56a5a | 30 | #define SYNTHVID_FB_SIZE_WIN8 (8 * 1024 * 1024) |
76c56a5a DR |
31 | |
32 | enum pipe_msg_type { | |
33 | PIPE_MSG_INVALID, | |
34 | PIPE_MSG_DATA, | |
35 | PIPE_MSG_MAX | |
36 | }; | |
37 | ||
38 | enum synthvid_msg_type { | |
39 | SYNTHVID_ERROR = 0, | |
40 | SYNTHVID_VERSION_REQUEST = 1, | |
41 | SYNTHVID_VERSION_RESPONSE = 2, | |
42 | SYNTHVID_VRAM_LOCATION = 3, | |
43 | SYNTHVID_VRAM_LOCATION_ACK = 4, | |
44 | SYNTHVID_SITUATION_UPDATE = 5, | |
45 | SYNTHVID_SITUATION_UPDATE_ACK = 6, | |
46 | SYNTHVID_POINTER_POSITION = 7, | |
47 | SYNTHVID_POINTER_SHAPE = 8, | |
48 | SYNTHVID_FEATURE_CHANGE = 9, | |
49 | SYNTHVID_DIRT = 10, | |
50 | SYNTHVID_RESOLUTION_REQUEST = 13, | |
51 | SYNTHVID_RESOLUTION_RESPONSE = 14, | |
52 | ||
53 | SYNTHVID_MAX = 15 | |
54 | }; | |
55 | ||
56 | struct pipe_msg_hdr { | |
57 | u32 type; | |
58 | u32 size; /* size of message after this field */ | |
59 | } __packed; | |
60 | ||
61 | struct hvd_screen_info { | |
62 | u16 width; | |
63 | u16 height; | |
64 | } __packed; | |
65 | ||
66 | struct synthvid_msg_hdr { | |
67 | u32 type; | |
68 | u32 size; /* size of this header + payload after this field */ | |
69 | } __packed; | |
70 | ||
71 | struct synthvid_version_req { | |
72 | u32 version; | |
73 | } __packed; | |
74 | ||
75 | struct synthvid_version_resp { | |
76 | u32 version; | |
77 | u8 is_accepted; | |
78 | u8 max_video_outputs; | |
79 | } __packed; | |
80 | ||
81 | struct synthvid_vram_location { | |
82 | u64 user_ctx; | |
83 | u8 is_vram_gpa_specified; | |
84 | u64 vram_gpa; | |
85 | } __packed; | |
86 | ||
87 | struct synthvid_vram_location_ack { | |
88 | u64 user_ctx; | |
89 | } __packed; | |
90 | ||
91 | struct video_output_situation { | |
92 | u8 active; | |
93 | u32 vram_offset; | |
94 | u8 depth_bits; | |
95 | u32 width_pixels; | |
96 | u32 height_pixels; | |
97 | u32 pitch_bytes; | |
98 | } __packed; | |
99 | ||
100 | struct synthvid_situation_update { | |
101 | u64 user_ctx; | |
102 | u8 video_output_count; | |
103 | struct video_output_situation video_output[1]; | |
104 | } __packed; | |
105 | ||
106 | struct synthvid_situation_update_ack { | |
107 | u64 user_ctx; | |
108 | } __packed; | |
109 | ||
110 | struct synthvid_pointer_position { | |
111 | u8 is_visible; | |
112 | u8 video_output; | |
113 | s32 image_x; | |
114 | s32 image_y; | |
115 | } __packed; | |
116 | ||
117 | #define SYNTHVID_CURSOR_MAX_X 96 | |
118 | #define SYNTHVID_CURSOR_MAX_Y 96 | |
119 | #define SYNTHVID_CURSOR_ARGB_PIXEL_SIZE 4 | |
120 | #define SYNTHVID_CURSOR_MAX_SIZE (SYNTHVID_CURSOR_MAX_X * \ | |
121 | SYNTHVID_CURSOR_MAX_Y * SYNTHVID_CURSOR_ARGB_PIXEL_SIZE) | |
122 | #define SYNTHVID_CURSOR_COMPLETE (-1) | |
123 | ||
124 | struct synthvid_pointer_shape { | |
125 | u8 part_idx; | |
126 | u8 is_argb; | |
127 | u32 width; /* SYNTHVID_CURSOR_MAX_X at most */ | |
128 | u32 height; /* SYNTHVID_CURSOR_MAX_Y at most */ | |
129 | u32 hot_x; /* hotspot relative to upper-left of pointer image */ | |
130 | u32 hot_y; | |
131 | u8 data[4]; | |
132 | } __packed; | |
133 | ||
134 | struct synthvid_feature_change { | |
135 | u8 is_dirt_needed; | |
136 | u8 is_ptr_pos_needed; | |
137 | u8 is_ptr_shape_needed; | |
138 | u8 is_situ_needed; | |
139 | } __packed; | |
140 | ||
141 | struct rect { | |
142 | s32 x1, y1; /* top left corner */ | |
143 | s32 x2, y2; /* bottom right corner, exclusive */ | |
144 | } __packed; | |
145 | ||
146 | struct synthvid_dirt { | |
147 | u8 video_output; | |
148 | u8 dirt_count; | |
149 | struct rect rect[1]; | |
150 | } __packed; | |
151 | ||
152 | #define SYNTHVID_EDID_BLOCK_SIZE 128 | |
153 | #define SYNTHVID_MAX_RESOLUTION_COUNT 64 | |
154 | ||
155 | struct synthvid_supported_resolution_req { | |
156 | u8 maximum_resolution_count; | |
157 | } __packed; | |
158 | ||
159 | struct synthvid_supported_resolution_resp { | |
160 | u8 edid_block[SYNTHVID_EDID_BLOCK_SIZE]; | |
161 | u8 resolution_count; | |
162 | u8 default_resolution_index; | |
163 | u8 is_standard; | |
164 | struct hvd_screen_info supported_resolution[SYNTHVID_MAX_RESOLUTION_COUNT]; | |
165 | } __packed; | |
166 | ||
167 | struct synthvid_msg { | |
168 | struct pipe_msg_hdr pipe_hdr; | |
169 | struct synthvid_msg_hdr vid_hdr; | |
170 | union { | |
171 | struct synthvid_version_req ver_req; | |
172 | struct synthvid_version_resp ver_resp; | |
173 | struct synthvid_vram_location vram; | |
174 | struct synthvid_vram_location_ack vram_ack; | |
175 | struct synthvid_situation_update situ; | |
176 | struct synthvid_situation_update_ack situ_ack; | |
177 | struct synthvid_pointer_position ptr_pos; | |
178 | struct synthvid_pointer_shape ptr_shape; | |
179 | struct synthvid_feature_change feature_chg; | |
180 | struct synthvid_dirt dirt; | |
181 | struct synthvid_supported_resolution_req resolution_req; | |
182 | struct synthvid_supported_resolution_resp resolution_resp; | |
183 | }; | |
184 | } __packed; | |
185 | ||
186 | static inline bool hyperv_version_ge(u32 ver1, u32 ver2) | |
187 | { | |
188 | if (SYNTHVID_VER_GET_MAJOR(ver1) > SYNTHVID_VER_GET_MAJOR(ver2) || | |
189 | (SYNTHVID_VER_GET_MAJOR(ver1) == SYNTHVID_VER_GET_MAJOR(ver2) && | |
190 | SYNTHVID_VER_GET_MINOR(ver1) >= SYNTHVID_VER_GET_MINOR(ver2))) | |
191 | return true; | |
192 | ||
193 | return false; | |
194 | } | |
195 | ||
196 | static inline int hyperv_sendpacket(struct hv_device *hdev, struct synthvid_msg *msg) | |
197 | { | |
198 | static atomic64_t request_id = ATOMIC64_INIT(0); | |
199 | struct hyperv_drm_device *hv = hv_get_drvdata(hdev); | |
200 | int ret; | |
201 | ||
202 | msg->pipe_hdr.type = PIPE_MSG_DATA; | |
203 | msg->pipe_hdr.size = msg->vid_hdr.size; | |
204 | ||
205 | ret = vmbus_sendpacket(hdev->channel, msg, | |
206 | msg->vid_hdr.size + sizeof(struct pipe_msg_hdr), | |
207 | atomic64_inc_return(&request_id), | |
208 | VM_PKT_DATA_INBAND, 0); | |
209 | ||
210 | if (ret) | |
211 | drm_err(&hv->dev, "Unable to send packet via vmbus\n"); | |
212 | ||
213 | return ret; | |
214 | } | |
215 | ||
216 | static int hyperv_negotiate_version(struct hv_device *hdev, u32 ver) | |
217 | { | |
218 | struct hyperv_drm_device *hv = hv_get_drvdata(hdev); | |
219 | struct synthvid_msg *msg = (struct synthvid_msg *)hv->init_buf; | |
220 | struct drm_device *dev = &hv->dev; | |
221 | unsigned long t; | |
222 | ||
223 | memset(msg, 0, sizeof(struct synthvid_msg)); | |
224 | msg->vid_hdr.type = SYNTHVID_VERSION_REQUEST; | |
225 | msg->vid_hdr.size = sizeof(struct synthvid_msg_hdr) + | |
226 | sizeof(struct synthvid_version_req); | |
227 | msg->ver_req.version = ver; | |
228 | hyperv_sendpacket(hdev, msg); | |
229 | ||
230 | t = wait_for_completion_timeout(&hv->wait, VMBUS_VSP_TIMEOUT); | |
231 | if (!t) { | |
232 | drm_err(dev, "Time out on waiting version response\n"); | |
233 | return -ETIMEDOUT; | |
234 | } | |
235 | ||
236 | if (!msg->ver_resp.is_accepted) { | |
237 | drm_err(dev, "Version request not accepted\n"); | |
238 | return -ENODEV; | |
239 | } | |
240 | ||
241 | hv->synthvid_version = ver; | |
242 | drm_info(dev, "Synthvid Version major %d, minor %d\n", | |
243 | SYNTHVID_VER_GET_MAJOR(ver), SYNTHVID_VER_GET_MINOR(ver)); | |
244 | ||
245 | return 0; | |
246 | } | |
247 | ||
248 | int hyperv_update_vram_location(struct hv_device *hdev, phys_addr_t vram_pp) | |
249 | { | |
250 | struct hyperv_drm_device *hv = hv_get_drvdata(hdev); | |
251 | struct synthvid_msg *msg = (struct synthvid_msg *)hv->init_buf; | |
252 | struct drm_device *dev = &hv->dev; | |
253 | unsigned long t; | |
254 | ||
255 | memset(msg, 0, sizeof(struct synthvid_msg)); | |
256 | msg->vid_hdr.type = SYNTHVID_VRAM_LOCATION; | |
257 | msg->vid_hdr.size = sizeof(struct synthvid_msg_hdr) + | |
258 | sizeof(struct synthvid_vram_location); | |
259 | msg->vram.user_ctx = vram_pp; | |
260 | msg->vram.vram_gpa = vram_pp; | |
261 | msg->vram.is_vram_gpa_specified = 1; | |
262 | hyperv_sendpacket(hdev, msg); | |
263 | ||
264 | t = wait_for_completion_timeout(&hv->wait, VMBUS_VSP_TIMEOUT); | |
265 | if (!t) { | |
266 | drm_err(dev, "Time out on waiting vram location ack\n"); | |
267 | return -ETIMEDOUT; | |
268 | } | |
269 | if (msg->vram_ack.user_ctx != vram_pp) { | |
270 | drm_err(dev, "Unable to set VRAM location\n"); | |
271 | return -ENODEV; | |
272 | } | |
273 | ||
274 | return 0; | |
275 | } | |
276 | ||
277 | int hyperv_update_situation(struct hv_device *hdev, u8 active, u32 bpp, | |
278 | u32 w, u32 h, u32 pitch) | |
279 | { | |
280 | struct synthvid_msg msg; | |
281 | ||
282 | memset(&msg, 0, sizeof(struct synthvid_msg)); | |
283 | ||
284 | msg.vid_hdr.type = SYNTHVID_SITUATION_UPDATE; | |
285 | msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) + | |
286 | sizeof(struct synthvid_situation_update); | |
287 | msg.situ.user_ctx = 0; | |
288 | msg.situ.video_output_count = 1; | |
289 | msg.situ.video_output[0].active = active; | |
290 | /* vram_offset should always be 0 */ | |
291 | msg.situ.video_output[0].vram_offset = 0; | |
292 | msg.situ.video_output[0].depth_bits = bpp; | |
293 | msg.situ.video_output[0].width_pixels = w; | |
294 | msg.situ.video_output[0].height_pixels = h; | |
295 | msg.situ.video_output[0].pitch_bytes = pitch; | |
296 | ||
297 | hyperv_sendpacket(hdev, &msg); | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
b253c302 DC |
302 | /* |
303 | * Hyper-V supports a hardware cursor feature. It's not used by Linux VM, | |
304 | * but the Hyper-V host still draws a point as an extra mouse pointer, | |
305 | * which is unwanted, especially when Xorg is running. | |
306 | * | |
307 | * The hyperv_fb driver uses synthvid_send_ptr() to hide the unwanted | |
308 | * pointer, by setting msg.ptr_pos.is_visible = 1 and setting the | |
309 | * msg.ptr_shape.data. Note: setting msg.ptr_pos.is_visible to 0 doesn't | |
310 | * work in tests. | |
311 | * | |
312 | * Copy synthvid_send_ptr() to hyperv_drm and rename it to | |
313 | * hyperv_hide_hw_ptr(). Note: hyperv_hide_hw_ptr() is also called in the | |
314 | * handler of the SYNTHVID_FEATURE_CHANGE event, otherwise the host still | |
315 | * draws an extra unwanted mouse pointer after the VM Connection window is | |
316 | * closed and reopened. | |
317 | */ | |
318 | int hyperv_hide_hw_ptr(struct hv_device *hdev) | |
319 | { | |
320 | struct synthvid_msg msg; | |
321 | ||
322 | memset(&msg, 0, sizeof(struct synthvid_msg)); | |
323 | msg.vid_hdr.type = SYNTHVID_POINTER_POSITION; | |
324 | msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) + | |
325 | sizeof(struct synthvid_pointer_position); | |
326 | msg.ptr_pos.is_visible = 1; | |
327 | msg.ptr_pos.video_output = 0; | |
328 | msg.ptr_pos.image_x = 0; | |
329 | msg.ptr_pos.image_y = 0; | |
330 | hyperv_sendpacket(hdev, &msg); | |
331 | ||
332 | memset(&msg, 0, sizeof(struct synthvid_msg)); | |
333 | msg.vid_hdr.type = SYNTHVID_POINTER_SHAPE; | |
334 | msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) + | |
335 | sizeof(struct synthvid_pointer_shape); | |
336 | msg.ptr_shape.part_idx = SYNTHVID_CURSOR_COMPLETE; | |
337 | msg.ptr_shape.is_argb = 1; | |
338 | msg.ptr_shape.width = 1; | |
339 | msg.ptr_shape.height = 1; | |
340 | msg.ptr_shape.hot_x = 0; | |
341 | msg.ptr_shape.hot_y = 0; | |
342 | msg.ptr_shape.data[0] = 0; | |
343 | msg.ptr_shape.data[1] = 1; | |
344 | msg.ptr_shape.data[2] = 1; | |
345 | msg.ptr_shape.data[3] = 1; | |
346 | hyperv_sendpacket(hdev, &msg); | |
347 | ||
348 | return 0; | |
349 | } | |
350 | ||
76c56a5a DR |
351 | int hyperv_update_dirt(struct hv_device *hdev, struct drm_rect *rect) |
352 | { | |
25bfa956 | 353 | struct hyperv_drm_device *hv = hv_get_drvdata(hdev); |
76c56a5a DR |
354 | struct synthvid_msg msg; |
355 | ||
25bfa956 DR |
356 | if (!hv->dirt_needed) |
357 | return 0; | |
358 | ||
76c56a5a DR |
359 | memset(&msg, 0, sizeof(struct synthvid_msg)); |
360 | ||
361 | msg.vid_hdr.type = SYNTHVID_DIRT; | |
362 | msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) + | |
363 | sizeof(struct synthvid_dirt); | |
364 | msg.dirt.video_output = 0; | |
365 | msg.dirt.dirt_count = 1; | |
366 | msg.dirt.rect[0].x1 = rect->x1; | |
367 | msg.dirt.rect[0].y1 = rect->y1; | |
368 | msg.dirt.rect[0].x2 = rect->x2; | |
369 | msg.dirt.rect[0].y2 = rect->y2; | |
370 | ||
371 | hyperv_sendpacket(hdev, &msg); | |
372 | ||
373 | return 0; | |
374 | } | |
375 | ||
376 | static int hyperv_get_supported_resolution(struct hv_device *hdev) | |
377 | { | |
378 | struct hyperv_drm_device *hv = hv_get_drvdata(hdev); | |
379 | struct synthvid_msg *msg = (struct synthvid_msg *)hv->init_buf; | |
380 | struct drm_device *dev = &hv->dev; | |
381 | unsigned long t; | |
382 | u8 index; | |
383 | int i; | |
384 | ||
385 | memset(msg, 0, sizeof(struct synthvid_msg)); | |
386 | msg->vid_hdr.type = SYNTHVID_RESOLUTION_REQUEST; | |
387 | msg->vid_hdr.size = sizeof(struct synthvid_msg_hdr) + | |
388 | sizeof(struct synthvid_supported_resolution_req); | |
389 | msg->resolution_req.maximum_resolution_count = | |
390 | SYNTHVID_MAX_RESOLUTION_COUNT; | |
391 | hyperv_sendpacket(hdev, msg); | |
392 | ||
393 | t = wait_for_completion_timeout(&hv->wait, VMBUS_VSP_TIMEOUT); | |
394 | if (!t) { | |
395 | drm_err(dev, "Time out on waiting resolution response\n"); | |
396 | return -ETIMEDOUT; | |
397 | } | |
398 | ||
399 | if (msg->resolution_resp.resolution_count == 0) { | |
400 | drm_err(dev, "No supported resolutions\n"); | |
401 | return -ENODEV; | |
402 | } | |
403 | ||
404 | index = msg->resolution_resp.default_resolution_index; | |
405 | if (index >= msg->resolution_resp.resolution_count) { | |
406 | drm_err(dev, "Invalid resolution index: %d\n", index); | |
407 | return -ENODEV; | |
408 | } | |
409 | ||
410 | for (i = 0; i < msg->resolution_resp.resolution_count; i++) { | |
411 | hv->screen_width_max = max_t(u32, hv->screen_width_max, | |
412 | msg->resolution_resp.supported_resolution[i].width); | |
413 | hv->screen_height_max = max_t(u32, hv->screen_height_max, | |
414 | msg->resolution_resp.supported_resolution[i].height); | |
415 | } | |
416 | ||
417 | hv->preferred_width = | |
418 | msg->resolution_resp.supported_resolution[index].width; | |
419 | hv->preferred_height = | |
420 | msg->resolution_resp.supported_resolution[index].height; | |
421 | ||
422 | return 0; | |
423 | } | |
424 | ||
425 | static void hyperv_receive_sub(struct hv_device *hdev) | |
426 | { | |
427 | struct hyperv_drm_device *hv = hv_get_drvdata(hdev); | |
428 | struct synthvid_msg *msg; | |
429 | ||
430 | if (!hv) | |
431 | return; | |
432 | ||
433 | msg = (struct synthvid_msg *)hv->recv_buf; | |
434 | ||
435 | /* Complete the wait event */ | |
436 | if (msg->vid_hdr.type == SYNTHVID_VERSION_RESPONSE || | |
437 | msg->vid_hdr.type == SYNTHVID_RESOLUTION_RESPONSE || | |
438 | msg->vid_hdr.type == SYNTHVID_VRAM_LOCATION_ACK) { | |
439 | memcpy(hv->init_buf, msg, VMBUS_MAX_PACKET_SIZE); | |
440 | complete(&hv->wait); | |
441 | return; | |
442 | } | |
25bfa956 | 443 | |
b253c302 | 444 | if (msg->vid_hdr.type == SYNTHVID_FEATURE_CHANGE) { |
25bfa956 | 445 | hv->dirt_needed = msg->feature_chg.is_dirt_needed; |
b253c302 DC |
446 | if (hv->dirt_needed) |
447 | hyperv_hide_hw_ptr(hv->hdev); | |
448 | } | |
76c56a5a DR |
449 | } |
450 | ||
451 | static void hyperv_receive(void *ctx) | |
452 | { | |
453 | struct hv_device *hdev = ctx; | |
454 | struct hyperv_drm_device *hv = hv_get_drvdata(hdev); | |
455 | struct synthvid_msg *recv_buf; | |
456 | u32 bytes_recvd; | |
457 | u64 req_id; | |
458 | int ret; | |
459 | ||
460 | if (!hv) | |
461 | return; | |
462 | ||
463 | recv_buf = (struct synthvid_msg *)hv->recv_buf; | |
464 | ||
465 | do { | |
466 | ret = vmbus_recvpacket(hdev->channel, recv_buf, | |
467 | VMBUS_MAX_PACKET_SIZE, | |
468 | &bytes_recvd, &req_id); | |
469 | if (bytes_recvd > 0 && | |
470 | recv_buf->pipe_hdr.type == PIPE_MSG_DATA) | |
471 | hyperv_receive_sub(hdev); | |
472 | } while (bytes_recvd > 0 && ret == 0); | |
473 | } | |
474 | ||
475 | int hyperv_connect_vsp(struct hv_device *hdev) | |
476 | { | |
477 | struct hyperv_drm_device *hv = hv_get_drvdata(hdev); | |
478 | struct drm_device *dev = &hv->dev; | |
479 | int ret; | |
480 | ||
481 | ret = vmbus_open(hdev->channel, VMBUS_RING_BUFSIZE, VMBUS_RING_BUFSIZE, | |
482 | NULL, 0, hyperv_receive, hdev); | |
483 | if (ret) { | |
484 | drm_err(dev, "Unable to open vmbus channel\n"); | |
485 | return ret; | |
486 | } | |
487 | ||
488 | /* Negotiate the protocol version with host */ | |
489 | switch (vmbus_proto_version) { | |
490 | case VERSION_WIN10: | |
491 | case VERSION_WIN10_V5: | |
492 | ret = hyperv_negotiate_version(hdev, SYNTHVID_VERSION_WIN10); | |
493 | if (!ret) | |
494 | break; | |
495 | fallthrough; | |
496 | case VERSION_WIN8: | |
497 | case VERSION_WIN8_1: | |
498 | ret = hyperv_negotiate_version(hdev, SYNTHVID_VERSION_WIN8); | |
76c56a5a DR |
499 | break; |
500 | default: | |
501 | ret = hyperv_negotiate_version(hdev, SYNTHVID_VERSION_WIN10); | |
502 | break; | |
503 | } | |
504 | ||
505 | if (ret) { | |
506 | drm_err(dev, "Synthetic video device version not accepted %d\n", ret); | |
507 | goto error; | |
508 | } | |
509 | ||
ac6811a9 | 510 | hv->screen_depth = SYNTHVID_DEPTH_WIN8; |
76c56a5a DR |
511 | |
512 | if (hyperv_version_ge(hv->synthvid_version, SYNTHVID_VERSION_WIN10)) { | |
513 | ret = hyperv_get_supported_resolution(hdev); | |
514 | if (ret) | |
515 | drm_err(dev, "Failed to get supported resolution from host, use default\n"); | |
516 | } else { | |
ac6811a9 MK |
517 | hv->screen_width_max = SYNTHVID_WIDTH_WIN8; |
518 | hv->screen_height_max = SYNTHVID_HEIGHT_WIN8; | |
76c56a5a DR |
519 | } |
520 | ||
521 | hv->mmio_megabytes = hdev->channel->offermsg.offer.mmio_megabytes; | |
522 | ||
523 | return 0; | |
524 | ||
525 | error: | |
526 | vmbus_close(hdev->channel); | |
527 | return ret; | |
528 | } |