1/*
2 * Copyright (C) 2015 Red Hat, Inc.
3 * All Rights Reserved.
4 *
5 * Authors:
6 * Dave Airlie
7 * Alon Levy
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25 * OTHER DEALINGS IN THE SOFTWARE.
26 */
27
28#include <drm/drm_atomic_helper.h>
29#include <drm/drm_damage_helper.h>
30#include <drm/drm_edid.h>
31#include <drm/drm_fourcc.h>
32#include <drm/drm_gem_framebuffer_helper.h>
33#include <drm/drm_probe_helper.h>
34#include <drm/drm_simple_kms_helper.h>
35
36#include "virtgpu_drv.h"
37
38#define XRES_MIN 32
39#define YRES_MIN 32
40
41#define XRES_DEF 1024
42#define YRES_DEF 768
43
44#define XRES_MAX 8192
45#define YRES_MAX 8192
46
47#define drm_connector_to_virtio_gpu_output(x) \
48 container_of(x, struct virtio_gpu_output, conn)
49
50static const struct drm_crtc_funcs virtio_gpu_crtc_funcs = {
51 .set_config = drm_atomic_helper_set_config,
52 .destroy = drm_crtc_cleanup,
53
54 .page_flip = drm_atomic_helper_page_flip,
55 .reset = drm_atomic_helper_crtc_reset,
56 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
57 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
58};
59
60static const struct drm_framebuffer_funcs virtio_gpu_fb_funcs = {
61 .create_handle = drm_gem_fb_create_handle,
62 .destroy = drm_gem_fb_destroy,
63 .dirty = drm_atomic_helper_dirtyfb,
64};
65
66static int
67virtio_gpu_framebuffer_init(struct drm_device *dev,
68 struct virtio_gpu_framebuffer *vgfb,
69 const struct drm_format_info *info,
70 const struct drm_mode_fb_cmd2 *mode_cmd,
71 struct drm_gem_object *obj)
72{
73 int ret;
74
75 vgfb->base.obj[0] = obj;
76
77 drm_helper_mode_fill_fb_struct(dev, fb: &vgfb->base, info, mode_cmd);
78
79 ret = drm_framebuffer_init(dev, fb: &vgfb->base, funcs: &virtio_gpu_fb_funcs);
80 if (ret) {
81 vgfb->base.obj[0] = NULL;
82 return ret;
83 }
84 return 0;
85}
86
87static void virtio_gpu_crtc_mode_set_nofb(struct drm_crtc *crtc)
88{
89 struct drm_device *dev = crtc->dev;
90 struct virtio_gpu_device *vgdev = dev->dev_private;
91 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
92
93 virtio_gpu_cmd_set_scanout(vgdev, scanout_id: output->index, resource_id: 0,
94 width: crtc->mode.hdisplay,
95 height: crtc->mode.vdisplay, x: 0, y: 0);
96 virtio_gpu_notify(vgdev);
97}
98
99static void virtio_gpu_crtc_atomic_enable(struct drm_crtc *crtc,
100 struct drm_atomic_state *state)
101{
102}
103
104static void virtio_gpu_crtc_atomic_disable(struct drm_crtc *crtc,
105 struct drm_atomic_state *state)
106{
107 struct drm_device *dev = crtc->dev;
108 struct virtio_gpu_device *vgdev = dev->dev_private;
109 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
110
111 virtio_gpu_cmd_set_scanout(vgdev, scanout_id: output->index, resource_id: 0, width: 0, height: 0, x: 0, y: 0);
112 virtio_gpu_notify(vgdev);
113}
114
115static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc,
116 struct drm_atomic_state *state)
117{
118 return 0;
119}
120
121static void virtio_gpu_crtc_atomic_flush(struct drm_crtc *crtc,
122 struct drm_atomic_state *state)
123{
124 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
125 crtc);
126 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
127
128 /*
129 * virtio-gpu can't do modeset and plane update operations
130 * independent from each other. So the actual modeset happens
131 * in the plane update callback, and here we just check
132 * whenever we must force the modeset.
133 */
134 if (drm_atomic_crtc_needs_modeset(state: crtc_state))
135 output->needs_modeset = true;
136}
137
138static const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = {
139 .mode_set_nofb = virtio_gpu_crtc_mode_set_nofb,
140 .atomic_check = virtio_gpu_crtc_atomic_check,
141 .atomic_flush = virtio_gpu_crtc_atomic_flush,
142 .atomic_enable = virtio_gpu_crtc_atomic_enable,
143 .atomic_disable = virtio_gpu_crtc_atomic_disable,
144};
145
146static void virtio_gpu_enc_mode_set(struct drm_encoder *encoder,
147 struct drm_display_mode *mode,
148 struct drm_display_mode *adjusted_mode)
149{
150}
151
152static void virtio_gpu_enc_enable(struct drm_encoder *encoder)
153{
154}
155
156static void virtio_gpu_enc_disable(struct drm_encoder *encoder)
157{
158}
159
160static int virtio_gpu_conn_get_modes(struct drm_connector *connector)
161{
162 struct virtio_gpu_output *output =
163 drm_connector_to_virtio_gpu_output(connector);
164 struct drm_display_mode *mode = NULL;
165 int count, width, height;
166
167 count = drm_edid_connector_add_modes(connector);
168 if (count)
169 return count;
170
171 width = le32_to_cpu(output->info.r.width);
172 height = le32_to_cpu(output->info.r.height);
173 count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
174
175 if (width == 0 || height == 0) {
176 drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
177 } else {
178 DRM_DEBUG("add mode: %dx%d\n", width, height);
179 mode = drm_cvt_mode(dev: connector->dev, hdisplay: width, vdisplay: height, vrefresh: 60,
180 reduced: false, interlaced: false, margins: false);
181 if (!mode)
182 return count;
183 mode->type |= DRM_MODE_TYPE_PREFERRED;
184 drm_mode_probed_add(connector, mode);
185 count++;
186 }
187
188 return count;
189}
190
191static enum drm_mode_status virtio_gpu_conn_mode_valid(struct drm_connector *connector,
192 const struct drm_display_mode *mode)
193{
194 struct virtio_gpu_output *output =
195 drm_connector_to_virtio_gpu_output(connector);
196 int width, height;
197
198 width = le32_to_cpu(output->info.r.width);
199 height = le32_to_cpu(output->info.r.height);
200
201 if (!(mode->type & DRM_MODE_TYPE_PREFERRED))
202 return MODE_OK;
203 if (mode->hdisplay == XRES_DEF && mode->vdisplay == YRES_DEF)
204 return MODE_OK;
205 if (mode->hdisplay <= width && mode->hdisplay >= width - 16 &&
206 mode->vdisplay <= height && mode->vdisplay >= height - 16)
207 return MODE_OK;
208
209 DRM_DEBUG("del mode: %dx%d\n", mode->hdisplay, mode->vdisplay);
210 return MODE_BAD;
211}
212
213static const struct drm_encoder_helper_funcs virtio_gpu_enc_helper_funcs = {
214 .mode_set = virtio_gpu_enc_mode_set,
215 .enable = virtio_gpu_enc_enable,
216 .disable = virtio_gpu_enc_disable,
217};
218
219static const struct drm_connector_helper_funcs virtio_gpu_conn_helper_funcs = {
220 .get_modes = virtio_gpu_conn_get_modes,
221 .mode_valid = virtio_gpu_conn_mode_valid,
222};
223
224static enum drm_connector_status virtio_gpu_conn_detect(
225 struct drm_connector *connector,
226 bool force)
227{
228 struct virtio_gpu_output *output =
229 drm_connector_to_virtio_gpu_output(connector);
230
231 if (output->info.enabled)
232 return connector_status_connected;
233 else
234 return connector_status_disconnected;
235}
236
237static void virtio_gpu_conn_destroy(struct drm_connector *connector)
238{
239 drm_connector_unregister(connector);
240 drm_connector_cleanup(connector);
241}
242
243static const struct drm_connector_funcs virtio_gpu_connector_funcs = {
244 .detect = virtio_gpu_conn_detect,
245 .fill_modes = drm_helper_probe_single_connector_modes,
246 .destroy = virtio_gpu_conn_destroy,
247 .reset = drm_atomic_helper_connector_reset,
248 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
249 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
250};
251
252static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index)
253{
254 struct drm_device *dev = vgdev->ddev;
255 struct virtio_gpu_output *output = vgdev->outputs + index;
256 struct drm_connector *connector = &output->conn;
257 struct drm_encoder *encoder = &output->enc;
258 struct drm_crtc *crtc = &output->crtc;
259 struct drm_plane *primary, *cursor;
260
261 output->index = index;
262 if (index == 0) {
263 output->info.enabled = cpu_to_le32(true);
264 output->info.r.width = cpu_to_le32(XRES_DEF);
265 output->info.r.height = cpu_to_le32(YRES_DEF);
266 }
267
268 primary = virtio_gpu_plane_init(vgdev, type: DRM_PLANE_TYPE_PRIMARY, index);
269 if (IS_ERR(ptr: primary))
270 return PTR_ERR(ptr: primary);
271 cursor = virtio_gpu_plane_init(vgdev, type: DRM_PLANE_TYPE_CURSOR, index);
272 if (IS_ERR(ptr: cursor))
273 return PTR_ERR(ptr: cursor);
274 drm_crtc_init_with_planes(dev, crtc, primary, cursor,
275 funcs: &virtio_gpu_crtc_funcs, NULL);
276 drm_crtc_helper_add(crtc, funcs: &virtio_gpu_crtc_helper_funcs);
277
278 drm_connector_init(dev, connector, funcs: &virtio_gpu_connector_funcs,
279 DRM_MODE_CONNECTOR_VIRTUAL);
280 drm_connector_helper_add(connector, funcs: &virtio_gpu_conn_helper_funcs);
281 if (vgdev->has_edid)
282 drm_connector_attach_edid_property(connector);
283
284 drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_VIRTUAL);
285 drm_encoder_helper_add(encoder, funcs: &virtio_gpu_enc_helper_funcs);
286 encoder->possible_crtcs = 1 << index;
287
288 drm_connector_attach_encoder(connector, encoder);
289 drm_connector_register(connector);
290 return 0;
291}
292
293static struct drm_framebuffer *
294virtio_gpu_user_framebuffer_create(struct drm_device *dev,
295 struct drm_file *file_priv,
296 const struct drm_format_info *info,
297 const struct drm_mode_fb_cmd2 *mode_cmd)
298{
299 struct drm_gem_object *obj = NULL;
300 struct virtio_gpu_framebuffer *virtio_gpu_fb;
301 int ret;
302
303 if (mode_cmd->pixel_format != DRM_FORMAT_HOST_XRGB8888 &&
304 mode_cmd->pixel_format != DRM_FORMAT_HOST_ARGB8888)
305 return ERR_PTR(error: -ENOENT);
306
307 /* lookup object associated with res handle */
308 obj = drm_gem_object_lookup(filp: file_priv, handle: mode_cmd->handles[0]);
309 if (!obj)
310 return ERR_PTR(error: -EINVAL);
311
312 virtio_gpu_fb = kzalloc(sizeof(*virtio_gpu_fb), GFP_KERNEL);
313 if (virtio_gpu_fb == NULL) {
314 drm_gem_object_put(obj);
315 return ERR_PTR(error: -ENOMEM);
316 }
317
318 ret = virtio_gpu_framebuffer_init(dev, vgfb: virtio_gpu_fb, info, mode_cmd, obj);
319 if (ret) {
320 kfree(objp: virtio_gpu_fb);
321 drm_gem_object_put(obj);
322 return NULL;
323 }
324
325 return &virtio_gpu_fb->base;
326}
327
328static const struct drm_mode_config_funcs virtio_gpu_mode_funcs = {
329 .fb_create = virtio_gpu_user_framebuffer_create,
330 .atomic_check = drm_atomic_helper_check,
331 .atomic_commit = drm_atomic_helper_commit,
332};
333
334int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev)
335{
336 int i, ret;
337
338 if (!vgdev->num_scanouts)
339 return 0;
340
341 ret = drmm_mode_config_init(dev: vgdev->ddev);
342 if (ret)
343 return ret;
344
345 vgdev->ddev->mode_config.quirk_addfb_prefer_host_byte_order = true;
346 vgdev->ddev->mode_config.funcs = &virtio_gpu_mode_funcs;
347
348 /* modes will be validated against the framebuffer size */
349 vgdev->ddev->mode_config.min_width = XRES_MIN;
350 vgdev->ddev->mode_config.min_height = YRES_MIN;
351 vgdev->ddev->mode_config.max_width = XRES_MAX;
352 vgdev->ddev->mode_config.max_height = YRES_MAX;
353
354 vgdev->ddev->mode_config.fb_modifiers_not_supported = true;
355
356 for (i = 0 ; i < vgdev->num_scanouts; ++i)
357 vgdev_output_init(vgdev, index: i);
358
359 drm_mode_config_reset(dev: vgdev->ddev);
360 return 0;
361}
362
363void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev)
364{
365 int i;
366
367 if (!vgdev->num_scanouts)
368 return;
369
370 for (i = 0 ; i < vgdev->num_scanouts; ++i)
371 drm_edid_free(drm_edid: vgdev->outputs[i].drm_edid);
372}
373