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
50 static 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
60 static 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
66 static int
virtio_gpu_framebuffer_init(struct drm_device * dev,struct virtio_gpu_framebuffer * vgfb,const struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object * obj)67 virtio_gpu_framebuffer_init(struct drm_device *dev,
68 struct virtio_gpu_framebuffer *vgfb,
69 const struct drm_mode_fb_cmd2 *mode_cmd,
70 struct drm_gem_object *obj)
71 {
72 int ret;
73
74 vgfb->base.obj[0] = obj;
75
76 drm_helper_mode_fill_fb_struct(dev, &vgfb->base, mode_cmd);
77
78 ret = drm_framebuffer_init(dev, &vgfb->base, &virtio_gpu_fb_funcs);
79 if (ret) {
80 vgfb->base.obj[0] = NULL;
81 return ret;
82 }
83 return 0;
84 }
85
virtio_gpu_crtc_mode_set_nofb(struct drm_crtc * crtc)86 static void virtio_gpu_crtc_mode_set_nofb(struct drm_crtc *crtc)
87 {
88 struct drm_device *dev = crtc->dev;
89 struct virtio_gpu_device *vgdev = dev->dev_private;
90 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
91
92 virtio_gpu_cmd_set_scanout(vgdev, output->index, 0,
93 crtc->mode.hdisplay,
94 crtc->mode.vdisplay, 0, 0);
95 virtio_gpu_notify(vgdev);
96 }
97
virtio_gpu_crtc_atomic_enable(struct drm_crtc * crtc,struct drm_atomic_state * state)98 static void virtio_gpu_crtc_atomic_enable(struct drm_crtc *crtc,
99 struct drm_atomic_state *state)
100 {
101 }
102
virtio_gpu_crtc_atomic_disable(struct drm_crtc * crtc,struct drm_atomic_state * state)103 static void virtio_gpu_crtc_atomic_disable(struct drm_crtc *crtc,
104 struct drm_atomic_state *state)
105 {
106 struct drm_device *dev = crtc->dev;
107 struct virtio_gpu_device *vgdev = dev->dev_private;
108 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
109
110 virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 0, 0, 0, 0);
111 virtio_gpu_notify(vgdev);
112 }
113
virtio_gpu_crtc_atomic_check(struct drm_crtc * crtc,struct drm_atomic_state * state)114 static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc,
115 struct drm_atomic_state *state)
116 {
117 return 0;
118 }
119
virtio_gpu_crtc_atomic_flush(struct drm_crtc * crtc,struct drm_atomic_state * state)120 static void virtio_gpu_crtc_atomic_flush(struct drm_crtc *crtc,
121 struct drm_atomic_state *state)
122 {
123 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
124 crtc);
125 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
126
127 /*
128 * virtio-gpu can't do modeset and plane update operations
129 * independent from each other. So the actual modeset happens
130 * in the plane update callback, and here we just check
131 * whenever we must force the modeset.
132 */
133 if (drm_atomic_crtc_needs_modeset(crtc_state)) {
134 output->needs_modeset = true;
135 }
136 }
137
138 static 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
virtio_gpu_enc_mode_set(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)146 static 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
virtio_gpu_enc_enable(struct drm_encoder * encoder)152 static void virtio_gpu_enc_enable(struct drm_encoder *encoder)
153 {
154 }
155
virtio_gpu_enc_disable(struct drm_encoder * encoder)156 static void virtio_gpu_enc_disable(struct drm_encoder *encoder)
157 {
158 }
159
virtio_gpu_conn_get_modes(struct drm_connector * connector)160 static 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(connector->dev, width, height, 60,
180 false, false, 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
virtio_gpu_conn_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)191 static enum drm_mode_status virtio_gpu_conn_mode_valid(struct drm_connector *connector,
192 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
213 static 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
219 static 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
virtio_gpu_conn_detect(struct drm_connector * connector,bool force)224 static 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
virtio_gpu_conn_destroy(struct drm_connector * connector)237 static void virtio_gpu_conn_destroy(struct drm_connector *connector)
238 {
239 drm_connector_unregister(connector);
240 drm_connector_cleanup(connector);
241 }
242
243 static 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
vgdev_output_init(struct virtio_gpu_device * vgdev,int index)252 static 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, DRM_PLANE_TYPE_PRIMARY, index);
269 if (IS_ERR(primary))
270 return PTR_ERR(primary);
271 cursor = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_CURSOR, index);
272 if (IS_ERR(cursor))
273 return PTR_ERR(cursor);
274 drm_crtc_init_with_planes(dev, crtc, primary, cursor,
275 &virtio_gpu_crtc_funcs, NULL);
276 drm_crtc_helper_add(crtc, &virtio_gpu_crtc_helper_funcs);
277
278 drm_connector_init(dev, connector, &virtio_gpu_connector_funcs,
279 DRM_MODE_CONNECTOR_VIRTUAL);
280 drm_connector_helper_add(connector, &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, &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
293 static struct drm_framebuffer *
virtio_gpu_user_framebuffer_create(struct drm_device * dev,struct drm_file * file_priv,const struct drm_mode_fb_cmd2 * mode_cmd)294 virtio_gpu_user_framebuffer_create(struct drm_device *dev,
295 struct drm_file *file_priv,
296 const struct drm_mode_fb_cmd2 *mode_cmd)
297 {
298 struct drm_gem_object *obj = NULL;
299 struct virtio_gpu_framebuffer *virtio_gpu_fb;
300 int ret;
301
302 if (mode_cmd->pixel_format != DRM_FORMAT_HOST_XRGB8888 &&
303 mode_cmd->pixel_format != DRM_FORMAT_HOST_ARGB8888)
304 return ERR_PTR(-ENOENT);
305
306 /* lookup object associated with res handle */
307 obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]);
308 if (!obj)
309 return ERR_PTR(-EINVAL);
310
311 virtio_gpu_fb = kzalloc(sizeof(*virtio_gpu_fb), GFP_KERNEL);
312 if (virtio_gpu_fb == NULL) {
313 drm_gem_object_put(obj);
314 return ERR_PTR(-ENOMEM);
315 }
316
317 ret = virtio_gpu_framebuffer_init(dev, virtio_gpu_fb, mode_cmd, obj);
318 if (ret) {
319 kfree(virtio_gpu_fb);
320 drm_gem_object_put(obj);
321 return NULL;
322 }
323
324 return &virtio_gpu_fb->base;
325 }
326
327 static const struct drm_mode_config_funcs virtio_gpu_mode_funcs = {
328 .fb_create = virtio_gpu_user_framebuffer_create,
329 .atomic_check = drm_atomic_helper_check,
330 .atomic_commit = drm_atomic_helper_commit,
331 };
332
virtio_gpu_modeset_init(struct virtio_gpu_device * vgdev)333 int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev)
334 {
335 int i, ret;
336
337 if (!vgdev->num_scanouts)
338 return 0;
339
340 ret = drmm_mode_config_init(vgdev->ddev);
341 if (ret)
342 return ret;
343
344 vgdev->ddev->mode_config.quirk_addfb_prefer_host_byte_order = true;
345 vgdev->ddev->mode_config.funcs = &virtio_gpu_mode_funcs;
346
347 /* modes will be validated against the framebuffer size */
348 vgdev->ddev->mode_config.min_width = XRES_MIN;
349 vgdev->ddev->mode_config.min_height = YRES_MIN;
350 vgdev->ddev->mode_config.max_width = XRES_MAX;
351 vgdev->ddev->mode_config.max_height = YRES_MAX;
352
353 vgdev->ddev->mode_config.fb_modifiers_not_supported = true;
354
355 for (i = 0 ; i < vgdev->num_scanouts; ++i)
356 vgdev_output_init(vgdev, i);
357
358 drm_mode_config_reset(vgdev->ddev);
359 return 0;
360 }
361
virtio_gpu_modeset_fini(struct virtio_gpu_device * vgdev)362 void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev)
363 {
364 int i;
365
366 if (!vgdev->num_scanouts)
367 return;
368
369 for (i = 0 ; i < vgdev->num_scanouts; ++i)
370 drm_edid_free(vgdev->outputs[i].drm_edid);
371 }
372