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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_fourcc.h>
31#include <drm/drm_gem_framebuffer_helper.h>
32#include <drm/drm_probe_helper.h>
33#include <drm/drm_vblank.h>
34
35#include "virtgpu_drv.h"
36
37#define XRES_MIN 32
38#define YRES_MIN 32
39
40#define XRES_DEF 1024
41#define YRES_DEF 768
42
43#define XRES_MAX 8192
44#define YRES_MAX 8192
45
46static const struct drm_crtc_funcs virtio_gpu_crtc_funcs = {
47 .set_config = drm_atomic_helper_set_config,
48 .destroy = drm_crtc_cleanup,
49
50 .page_flip = drm_atomic_helper_page_flip,
51 .reset = drm_atomic_helper_crtc_reset,
52 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
53 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
54};
55
56static const struct drm_framebuffer_funcs virtio_gpu_fb_funcs = {
57 .create_handle = drm_gem_fb_create_handle,
58 .destroy = drm_gem_fb_destroy,
59 .dirty = drm_atomic_helper_dirtyfb,
60};
61
62int
63virtio_gpu_framebuffer_init(struct drm_device *dev,
64 struct virtio_gpu_framebuffer *vgfb,
65 const struct drm_mode_fb_cmd2 *mode_cmd,
66 struct drm_gem_object *obj)
67{
68 int ret;
69
70 vgfb->base.obj[0] = obj;
71
72 drm_helper_mode_fill_fb_struct(dev, &vgfb->base, mode_cmd);
73
74 ret = drm_framebuffer_init(dev, &vgfb->base, &virtio_gpu_fb_funcs);
75 if (ret) {
76 vgfb->base.obj[0] = NULL;
77 return ret;
78 }
79 return 0;
80}
81
82static void virtio_gpu_crtc_mode_set_nofb(struct drm_crtc *crtc)
83{
84 struct drm_device *dev = crtc->dev;
85 struct virtio_gpu_device *vgdev = dev->dev_private;
86 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
87
88 virtio_gpu_cmd_set_scanout(vgdev, output->index, 0,
89 crtc->mode.hdisplay,
90 crtc->mode.vdisplay, 0, 0);
91}
92
93static void virtio_gpu_crtc_atomic_enable(struct drm_crtc *crtc,
94 struct drm_crtc_state *old_state)
95{
96 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
97
98 output->enabled = true;
99}
100
101static void virtio_gpu_crtc_atomic_disable(struct drm_crtc *crtc,
102 struct drm_crtc_state *old_state)
103{
104 struct drm_device *dev = crtc->dev;
105 struct virtio_gpu_device *vgdev = dev->dev_private;
106 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
107
108 virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 0, 0, 0, 0);
109 output->enabled = false;
110}
111
112static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc,
113 struct drm_crtc_state *state)
114{
115 return 0;
116}
117
118static void virtio_gpu_crtc_atomic_flush(struct drm_crtc *crtc,
119 struct drm_crtc_state *old_state)
120{
121 unsigned long flags;
122
123 spin_lock_irqsave(&crtc->dev->event_lock, flags);
124 if (crtc->state->event)
125 drm_crtc_send_vblank_event(crtc, crtc->state->event);
126 crtc->state->event = NULL;
127 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
128}
129
130static const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = {
131 .mode_set_nofb = virtio_gpu_crtc_mode_set_nofb,
132 .atomic_check = virtio_gpu_crtc_atomic_check,
133 .atomic_flush = virtio_gpu_crtc_atomic_flush,
134 .atomic_enable = virtio_gpu_crtc_atomic_enable,
135 .atomic_disable = virtio_gpu_crtc_atomic_disable,
136};
137
138static void virtio_gpu_enc_mode_set(struct drm_encoder *encoder,
139 struct drm_display_mode *mode,
140 struct drm_display_mode *adjusted_mode)
141{
142}
143
144static void virtio_gpu_enc_enable(struct drm_encoder *encoder)
145{
146}
147
148static void virtio_gpu_enc_disable(struct drm_encoder *encoder)
149{
150}
151
152static int virtio_gpu_conn_get_modes(struct drm_connector *connector)
153{
154 struct virtio_gpu_output *output =
155 drm_connector_to_virtio_gpu_output(connector);
156 struct drm_display_mode *mode = NULL;
157 int count, width, height;
158
159 if (output->edid) {
160 count = drm_add_edid_modes(connector, output->edid);
161 if (count)
162 return count;
163 }
164
165 width = le32_to_cpu(output->info.r.width);
166 height = le32_to_cpu(output->info.r.height);
167 count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
168
169 if (width == 0 || height == 0) {
170 width = XRES_DEF;
171 height = YRES_DEF;
172 drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
173 } else {
174 DRM_DEBUG("add mode: %dx%d\n", width, height);
175 mode = drm_cvt_mode(connector->dev, width, height, 60,
176 false, false, false);
177 mode->type |= DRM_MODE_TYPE_PREFERRED;
178 drm_mode_probed_add(connector, mode);
179 count++;
180 }
181
182 return count;
183}
184
185static enum drm_mode_status virtio_gpu_conn_mode_valid(struct drm_connector *connector,
186 struct drm_display_mode *mode)
187{
188 struct virtio_gpu_output *output =
189 drm_connector_to_virtio_gpu_output(connector);
190 int width, height;
191
192 width = le32_to_cpu(output->info.r.width);
193 height = le32_to_cpu(output->info.r.height);
194
195 if (!(mode->type & DRM_MODE_TYPE_PREFERRED))
196 return MODE_OK;
197 if (mode->hdisplay == XRES_DEF && mode->vdisplay == YRES_DEF)
198 return MODE_OK;
199 if (mode->hdisplay <= width && mode->hdisplay >= width - 16 &&
200 mode->vdisplay <= height && mode->vdisplay >= height - 16)
201 return MODE_OK;
202
203 DRM_DEBUG("del mode: %dx%d\n", mode->hdisplay, mode->vdisplay);
204 return MODE_BAD;
205}
206
207static const struct drm_encoder_helper_funcs virtio_gpu_enc_helper_funcs = {
208 .mode_set = virtio_gpu_enc_mode_set,
209 .enable = virtio_gpu_enc_enable,
210 .disable = virtio_gpu_enc_disable,
211};
212
213static const struct drm_connector_helper_funcs virtio_gpu_conn_helper_funcs = {
214 .get_modes = virtio_gpu_conn_get_modes,
215 .mode_valid = virtio_gpu_conn_mode_valid,
216};
217
218static enum drm_connector_status virtio_gpu_conn_detect(
219 struct drm_connector *connector,
220 bool force)
221{
222 struct virtio_gpu_output *output =
223 drm_connector_to_virtio_gpu_output(connector);
224
225 if (output->info.enabled)
226 return connector_status_connected;
227 else
228 return connector_status_disconnected;
229}
230
231static void virtio_gpu_conn_destroy(struct drm_connector *connector)
232{
233 drm_connector_unregister(connector);
234 drm_connector_cleanup(connector);
235}
236
237static const struct drm_connector_funcs virtio_gpu_connector_funcs = {
238 .detect = virtio_gpu_conn_detect,
239 .fill_modes = drm_helper_probe_single_connector_modes,
240 .destroy = virtio_gpu_conn_destroy,
241 .reset = drm_atomic_helper_connector_reset,
242 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
243 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
244};
245
246static const struct drm_encoder_funcs virtio_gpu_enc_funcs = {
247 .destroy = drm_encoder_cleanup,
248};
249
250static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index)
251{
252 struct drm_device *dev = vgdev->ddev;
253 struct virtio_gpu_output *output = vgdev->outputs + index;
254 struct drm_connector *connector = &output->conn;
255 struct drm_encoder *encoder = &output->enc;
256 struct drm_crtc *crtc = &output->crtc;
257 struct drm_plane *primary, *cursor;
258
259 output->index = index;
260 if (index == 0) {
261 output->info.enabled = cpu_to_le32(true);
262 output->info.r.width = cpu_to_le32(XRES_DEF);
263 output->info.r.height = cpu_to_le32(YRES_DEF);
264 }
265
266 primary = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_PRIMARY, index);
267 if (IS_ERR(primary))
268 return PTR_ERR(primary);
269 cursor = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_CURSOR, index);
270 if (IS_ERR(cursor))
271 return PTR_ERR(cursor);
272 drm_crtc_init_with_planes(dev, crtc, primary, cursor,
273 &virtio_gpu_crtc_funcs, NULL);
274 drm_crtc_helper_add(crtc, &virtio_gpu_crtc_helper_funcs);
275
276 drm_connector_init(dev, connector, &virtio_gpu_connector_funcs,
277 DRM_MODE_CONNECTOR_VIRTUAL);
278 drm_connector_helper_add(connector, &virtio_gpu_conn_helper_funcs);
279 if (vgdev->has_edid)
280 drm_connector_attach_edid_property(connector);
281
282 drm_encoder_init(dev, encoder, &virtio_gpu_enc_funcs,
283 DRM_MODE_ENCODER_VIRTUAL, NULL);
284 drm_encoder_helper_add(encoder, &virtio_gpu_enc_helper_funcs);
285 encoder->possible_crtcs = 1 << index;
286
287 drm_connector_attach_encoder(connector, encoder);
288 drm_connector_register(connector);
289 return 0;
290}
291
292static struct drm_framebuffer *
293virtio_gpu_user_framebuffer_create(struct drm_device *dev,
294 struct drm_file *file_priv,
295 const struct drm_mode_fb_cmd2 *mode_cmd)
296{
297 struct drm_gem_object *obj = NULL;
298 struct virtio_gpu_framebuffer *virtio_gpu_fb;
299 int ret;
300
301 if (mode_cmd->pixel_format != DRM_FORMAT_HOST_XRGB8888 &&
302 mode_cmd->pixel_format != DRM_FORMAT_HOST_ARGB8888)
303 return ERR_PTR(-ENOENT);
304
305 /* lookup object associated with res handle */
306 obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]);
307 if (!obj)
308 return ERR_PTR(-EINVAL);
309
310 virtio_gpu_fb = kzalloc(sizeof(*virtio_gpu_fb), GFP_KERNEL);
311 if (virtio_gpu_fb == NULL)
312 return ERR_PTR(-ENOMEM);
313
314 ret = virtio_gpu_framebuffer_init(dev, virtio_gpu_fb, mode_cmd, obj);
315 if (ret) {
316 kfree(virtio_gpu_fb);
317 drm_gem_object_put_unlocked(obj);
318 return NULL;
319 }
320
321 return &virtio_gpu_fb->base;
322}
323
324static void vgdev_atomic_commit_tail(struct drm_atomic_state *state)
325{
326 struct drm_device *dev = state->dev;
327
328 drm_atomic_helper_commit_modeset_disables(dev, state);
329 drm_atomic_helper_commit_modeset_enables(dev, state);
330 drm_atomic_helper_commit_planes(dev, state, 0);
331
332 drm_atomic_helper_commit_hw_done(state);
333
334 drm_atomic_helper_wait_for_vblanks(dev, state);
335 drm_atomic_helper_cleanup_planes(dev, state);
336}
337
338static const struct drm_mode_config_helper_funcs virtio_mode_config_helpers = {
339 .atomic_commit_tail = vgdev_atomic_commit_tail,
340};
341
342static const struct drm_mode_config_funcs virtio_gpu_mode_funcs = {
343 .fb_create = virtio_gpu_user_framebuffer_create,
344 .atomic_check = drm_atomic_helper_check,
345 .atomic_commit = drm_atomic_helper_commit,
346};
347
348void virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev)
349{
350 int i;
351
352 drm_mode_config_init(vgdev->ddev);
353 vgdev->ddev->mode_config.quirk_addfb_prefer_host_byte_order = true;
354 vgdev->ddev->mode_config.funcs = &virtio_gpu_mode_funcs;
355 vgdev->ddev->mode_config.helper_private = &virtio_mode_config_helpers;
356
357 /* modes will be validated against the framebuffer size */
358 vgdev->ddev->mode_config.min_width = XRES_MIN;
359 vgdev->ddev->mode_config.min_height = YRES_MIN;
360 vgdev->ddev->mode_config.max_width = XRES_MAX;
361 vgdev->ddev->mode_config.max_height = YRES_MAX;
362
363 for (i = 0 ; i < vgdev->num_scanouts; ++i)
364 vgdev_output_init(vgdev, i);
365
366 drm_mode_config_reset(vgdev->ddev);
367}
368
369void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev)
370{
371 int i;
372
373 for (i = 0 ; i < vgdev->num_scanouts; ++i)
374 kfree(vgdev->outputs[i].edid);
375 drm_atomic_helper_shutdown(vgdev->ddev);
376 drm_mode_config_cleanup(vgdev->ddev);
377}