2 * Copyright (C) 2013 Google, Inc.
4 * This software is licensed under the terms of the GNU General Public
5 * License version 2, as published by the Free Software Foundation, and
6 * may be copied, distributed, and modified under those terms.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
15 #include <linux/kthread.h>
16 #include <linux/mutex.h>
17 #include <linux/slab.h>
21 #include <video/adf.h>
22 #include <video/adf_client.h>
23 #include <video/adf_format.h>
27 static inline bool vsync_active(u8 state)
29 return state == DRM_MODE_DPMS_ON || state == DRM_MODE_DPMS_STANDBY;
33 * adf_interface_blank - set interface's DPMS state
35 * @intf: the interface
36 * @state: one of %DRM_MODE_DPMS_*
38 * Returns 0 on success or -errno on failure.
40 int adf_interface_blank(struct adf_interface *intf, u8 state)
42 struct adf_device *dev = adf_interface_parent(intf);
47 struct adf_event_refcount *vsync_refcount;
49 if (!intf->ops || !intf->ops->blank)
52 if (state > DRM_MODE_DPMS_OFF)
55 mutex_lock(&dev->client_lock);
56 if (state != DRM_MODE_DPMS_ON)
57 flush_kthread_worker(&dev->post_worker);
58 mutex_lock(&intf->base.event_lock);
60 vsync_refcount = adf_obj_find_event_refcount(&intf->base,
62 if (!vsync_refcount) {
67 prev_state = intf->dpms_state;
68 if (prev_state == state) {
73 disable_vsync = vsync_active(prev_state) &&
74 !vsync_active(state) &&
75 vsync_refcount->refcount;
76 enable_vsync = !vsync_active(prev_state) &&
77 vsync_active(state) &&
78 vsync_refcount->refcount;
81 intf->base.ops->set_event(&intf->base, ADF_EVENT_VSYNC,
84 ret = intf->ops->blank(intf, state);
87 intf->base.ops->set_event(&intf->base, ADF_EVENT_VSYNC,
93 intf->base.ops->set_event(&intf->base, ADF_EVENT_VSYNC,
96 intf->dpms_state = state;
98 mutex_unlock(&intf->base.event_lock);
99 mutex_unlock(&dev->client_lock);
102 EXPORT_SYMBOL(adf_interface_blank);
105 * adf_interface_blank - get interface's current DPMS state
107 * @intf: the interface
109 * Returns one of %DRM_MODE_DPMS_*.
111 u8 adf_interface_dpms_state(struct adf_interface *intf)
113 struct adf_device *dev = adf_interface_parent(intf);
116 mutex_lock(&dev->client_lock);
117 dpms_state = intf->dpms_state;
118 mutex_unlock(&dev->client_lock);
122 EXPORT_SYMBOL(adf_interface_dpms_state);
125 * adf_interface_current_mode - get interface's current display mode
127 * @intf: the interface
128 * @mode: returns the current mode
130 void adf_interface_current_mode(struct adf_interface *intf,
131 struct drm_mode_modeinfo *mode)
133 struct adf_device *dev = adf_interface_parent(intf);
135 mutex_lock(&dev->client_lock);
136 memcpy(mode, &intf->current_mode, sizeof(*mode));
137 mutex_unlock(&dev->client_lock);
139 EXPORT_SYMBOL(adf_interface_current_mode);
142 * adf_interface_modelist - get interface's modelist
144 * @intf: the interface
145 * @modelist: storage for the modelist (optional)
146 * @n_modes: length of @modelist
148 * If @modelist is not NULL, adf_interface_modelist() will copy up to @n_modes
149 * modelist entries into @modelist.
151 * Returns the length of the modelist.
153 size_t adf_interface_modelist(struct adf_interface *intf,
154 struct drm_mode_modeinfo *modelist, size_t n_modes)
159 read_lock_irqsave(&intf->hotplug_modelist_lock, flags);
161 memcpy(modelist, intf->modelist, sizeof(modelist[0]) *
162 min(n_modes, intf->n_modes));
163 retval = intf->n_modes;
164 read_unlock_irqrestore(&intf->hotplug_modelist_lock, flags);
168 EXPORT_SYMBOL(adf_interface_modelist);
171 * adf_interface_set_mode - set interface's display mode
173 * @intf: the interface
174 * @mode: the new mode
176 * Returns 0 on success or -errno on failure.
178 int adf_interface_set_mode(struct adf_interface *intf,
179 struct drm_mode_modeinfo *mode)
181 struct adf_device *dev = adf_interface_parent(intf);
184 if (!intf->ops || !intf->ops->modeset)
187 mutex_lock(&dev->client_lock);
188 flush_kthread_worker(&dev->post_worker);
190 ret = intf->ops->modeset(intf, mode);
194 memcpy(&intf->current_mode, mode, sizeof(*mode));
196 mutex_unlock(&dev->client_lock);
199 EXPORT_SYMBOL(adf_interface_set_mode);
202 * adf_interface_screen_size - get size of screen connected to interface
204 * @intf: the interface
205 * @width_mm: returns the screen width in mm
206 * @height_mm: returns the screen width in mm
208 * Returns 0 on success or -errno on failure.
210 int adf_interface_get_screen_size(struct adf_interface *intf, u16 *width_mm,
213 struct adf_device *dev = adf_interface_parent(intf);
216 if (!intf->ops || !intf->ops->screen_size)
219 mutex_lock(&dev->client_lock);
220 ret = intf->ops->screen_size(intf, width_mm, height_mm);
221 mutex_unlock(&dev->client_lock);
225 EXPORT_SYMBOL(adf_interface_get_screen_size);
228 * adf_overlay_engine_supports_format - returns whether a format is in an
229 * overlay engine's supported list
231 * @eng: the overlay engine
232 * @format: format fourcc
234 bool adf_overlay_engine_supports_format(struct adf_overlay_engine *eng,
238 for (i = 0; i < eng->ops->n_supported_formats; i++)
239 if (format == eng->ops->supported_formats[i])
244 EXPORT_SYMBOL(adf_overlay_engine_supports_format);
246 static int adf_buffer_validate(struct adf_buffer *buf)
248 struct adf_overlay_engine *eng = buf->overlay_engine;
249 struct device *dev = &eng->base.dev;
250 struct adf_device *parent = adf_overlay_engine_parent(eng);
251 u8 hsub, vsub, num_planes, cpp[ADF_MAX_PLANES], i;
253 if (!adf_overlay_engine_supports_format(eng, buf->format)) {
254 char format_str[ADF_FORMAT_STR_SIZE];
255 adf_format_str(buf->format, format_str);
256 dev_err(dev, "unsupported format %s\n", format_str);
260 if (!adf_format_is_standard(buf->format))
261 return parent->ops->validate_custom_format(parent, buf);
263 hsub = adf_format_horz_chroma_subsampling(buf->format);
264 vsub = adf_format_vert_chroma_subsampling(buf->format);
265 num_planes = adf_format_num_planes(buf->format);
266 for (i = 0; i < num_planes; i++)
267 cpp[i] = adf_format_plane_cpp(buf->format, i);
269 return adf_format_validate_yuv(parent, buf, num_planes, hsub, vsub,
273 static int adf_buffer_map(struct adf_device *dev, struct adf_buffer *buf,
274 struct adf_buffer_mapping *mapping)
279 for (i = 0; i < buf->n_planes; i++) {
280 struct dma_buf_attachment *attachment;
281 struct sg_table *sg_table;
283 attachment = dma_buf_attach(buf->dma_bufs[i], dev->dev);
284 if (IS_ERR(attachment)) {
285 ret = PTR_ERR(attachment);
286 dev_err(&dev->base.dev, "attaching plane %zu failed: %d\n",
290 mapping->attachments[i] = attachment;
292 sg_table = dma_buf_map_attachment(attachment, DMA_TO_DEVICE);
293 if (IS_ERR(sg_table)) {
294 ret = PTR_ERR(sg_table);
295 dev_err(&dev->base.dev, "mapping plane %zu failed: %d",
298 } else if (!sg_table) {
300 dev_err(&dev->base.dev, "mapping plane %zu failed\n",
304 mapping->sg_tables[i] = sg_table;
309 adf_buffer_mapping_cleanup(mapping, buf);
314 static struct sync_fence *adf_sw_complete_fence(struct adf_device *dev)
317 struct sync_fence *complete_fence;
319 if (!dev->timeline) {
320 dev->timeline = sw_sync_timeline_create(dev->base.name);
322 return ERR_PTR(-ENOMEM);
323 dev->timeline_max = 1;
327 pt = sw_sync_pt_create(dev->timeline, dev->timeline_max);
330 complete_fence = sync_fence_create(dev->base.name, pt);
332 goto err_fence_create;
334 return complete_fence;
340 return ERR_PTR(-ENOSYS);
344 * adf_device_post - flip to a new set of buffers
346 * @dev: device targeted by the flip
347 * @intfs: interfaces targeted by the flip
348 * @n_intfs: number of targeted interfaces
349 * @bufs: description of buffers displayed
350 * @n_bufs: number of buffers displayed
351 * @custom_data: driver-private data
352 * @custom_data_size: size of driver-private data
354 * adf_device_post() will copy @intfs, @bufs, and @custom_data, so they may
355 * point to variables on the stack. adf_device_post() also takes its own
356 * reference on each of the dma-bufs in @bufs. The adf_device_post_nocopy()
357 * variant transfers ownership of these resources to ADF instead.
359 * On success, returns a sync fence which signals when the buffers are removed
360 * from the screen. On failure, returns ERR_PTR(-errno).
362 struct sync_fence *adf_device_post(struct adf_device *dev,
363 struct adf_interface **intfs, size_t n_intfs,
364 struct adf_buffer *bufs, size_t n_bufs, void *custom_data,
365 size_t custom_data_size)
367 struct adf_interface **intfs_copy = NULL;
368 struct adf_buffer *bufs_copy = NULL;
369 void *custom_data_copy = NULL;
370 struct sync_fence *ret;
373 intfs_copy = kzalloc(sizeof(intfs_copy[0]) * n_intfs, GFP_KERNEL);
375 return ERR_PTR(-ENOMEM);
377 bufs_copy = kzalloc(sizeof(bufs_copy[0]) * n_bufs, GFP_KERNEL);
379 ret = ERR_PTR(-ENOMEM);
383 custom_data_copy = kzalloc(custom_data_size, GFP_KERNEL);
384 if (!custom_data_copy) {
385 ret = ERR_PTR(-ENOMEM);
389 for (i = 0; i < n_bufs; i++) {
391 for (j = 0; j < bufs[i].n_planes; j++)
392 get_dma_buf(bufs[i].dma_bufs[j]);
395 memcpy(intfs_copy, intfs, sizeof(intfs_copy[0]) * n_intfs);
396 memcpy(bufs_copy, bufs, sizeof(bufs_copy[0]) * n_bufs);
397 memcpy(custom_data_copy, custom_data, custom_data_size);
399 ret = adf_device_post_nocopy(dev, intfs_copy, n_intfs, bufs_copy,
400 n_bufs, custom_data_copy, custom_data_size);
407 for (i = 0; i < n_bufs; i++) {
409 for (j = 0; j < bufs[i].n_planes; j++)
410 dma_buf_put(bufs[i].dma_bufs[j]);
413 kfree(custom_data_copy);
418 EXPORT_SYMBOL(adf_device_post);
421 * adf_device_post_nocopy - flip to a new set of buffers
423 * adf_device_post_nocopy() has the same behavior as adf_device_post(),
424 * except ADF does not copy @intfs, @bufs, or @custom_data, and it does
425 * not take an extra reference on the dma-bufs in @bufs.
427 * @intfs, @bufs, and @custom_data must point to buffers allocated by
428 * kmalloc(). On success, ADF takes ownership of these buffers and the dma-bufs
429 * in @bufs, and will kfree()/dma_buf_put() them when they are no longer needed.
430 * On failure, adf_device_post_nocopy() does NOT take ownership of these
431 * buffers or the dma-bufs, and the caller must clean them up.
433 * adf_device_post_nocopy() is mainly intended for implementing ADF's ioctls.
434 * Clients may find the nocopy variant useful in limited cases, but most should
435 * call adf_device_post() instead.
437 struct sync_fence *adf_device_post_nocopy(struct adf_device *dev,
438 struct adf_interface **intfs, size_t n_intfs,
439 struct adf_buffer *bufs, size_t n_bufs,
440 void *custom_data, size_t custom_data_size)
442 struct adf_pending_post *cfg;
443 struct adf_buffer_mapping *mappings;
444 struct sync_fence *ret;
448 cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
450 return ERR_PTR(-ENOMEM);
452 mappings = kzalloc(sizeof(mappings[0]) * n_bufs, GFP_KERNEL);
454 ret = ERR_PTR(-ENOMEM);
458 mutex_lock(&dev->client_lock);
460 for (i = 0; i < n_bufs; i++) {
461 err = adf_buffer_validate(&bufs[i]);
467 err = adf_buffer_map(dev, &bufs[i], &mappings[i]);
474 INIT_LIST_HEAD(&cfg->head);
475 cfg->config.n_bufs = n_bufs;
476 cfg->config.bufs = bufs;
477 cfg->config.mappings = mappings;
478 cfg->config.custom_data = custom_data;
479 cfg->config.custom_data_size = custom_data_size;
481 err = dev->ops->validate(dev, &cfg->config, &cfg->state);
487 mutex_lock(&dev->post_lock);
489 if (dev->ops->complete_fence)
490 ret = dev->ops->complete_fence(dev, &cfg->config,
493 ret = adf_sw_complete_fence(dev);
498 list_add_tail(&cfg->head, &dev->post_list);
499 queue_kthread_work(&dev->post_worker, &dev->post_work);
500 mutex_unlock(&dev->post_lock);
501 mutex_unlock(&dev->client_lock);
506 mutex_unlock(&dev->post_lock);
509 for (i = 0; i < n_bufs; i++)
510 adf_buffer_mapping_cleanup(&mappings[i], &bufs[i]);
512 mutex_unlock(&dev->client_lock);
519 EXPORT_SYMBOL(adf_device_post_nocopy);
521 static void adf_attachment_list_to_array(struct adf_device *dev,
522 struct list_head *src, struct adf_attachment *dst, size_t size)
524 struct adf_attachment_list *entry;
530 list_for_each_entry(entry, src, head) {
533 dst[i] = entry->attachment;
539 * adf_device_attachments - get device's list of active attachments
542 * @attachments: storage for the attachment list (optional)
543 * @n_attachments: length of @attachments
545 * If @attachments is not NULL, adf_device_attachments() will copy up to
546 * @n_attachments entries into @attachments.
548 * Returns the length of the active attachment list.
550 size_t adf_device_attachments(struct adf_device *dev,
551 struct adf_attachment *attachments, size_t n_attachments)
555 mutex_lock(&dev->client_lock);
556 adf_attachment_list_to_array(dev, &dev->attached, attachments,
558 retval = dev->n_attached;
559 mutex_unlock(&dev->client_lock);
563 EXPORT_SYMBOL(adf_device_attachments);
566 * adf_device_attachments_allowed - get device's list of allowed attachments
569 * @attachments: storage for the attachment list (optional)
570 * @n_attachments: length of @attachments
572 * If @attachments is not NULL, adf_device_attachments_allowed() will copy up to
573 * @n_attachments entries into @attachments.
575 * Returns the length of the allowed attachment list.
577 size_t adf_device_attachments_allowed(struct adf_device *dev,
578 struct adf_attachment *attachments, size_t n_attachments)
582 mutex_lock(&dev->client_lock);
583 adf_attachment_list_to_array(dev, &dev->attach_allowed, attachments,
585 retval = dev->n_attach_allowed;
586 mutex_unlock(&dev->client_lock);
590 EXPORT_SYMBOL(adf_device_attachments_allowed);
593 * adf_device_attached - return whether an overlay engine and interface are
596 * @dev: the parent device
597 * @eng: the overlay engine
598 * @intf: the interface
600 bool adf_device_attached(struct adf_device *dev, struct adf_overlay_engine *eng,
601 struct adf_interface *intf)
603 struct adf_attachment_list *attachment;
605 mutex_lock(&dev->client_lock);
606 attachment = adf_attachment_find(&dev->attached, eng, intf);
607 mutex_unlock(&dev->client_lock);
609 return attachment != NULL;
611 EXPORT_SYMBOL(adf_device_attached);
614 * adf_device_attach_allowed - return whether the ADF device supports attaching
615 * an overlay engine and interface
617 * @dev: the parent device
618 * @eng: the overlay engine
619 * @intf: the interface
621 bool adf_device_attach_allowed(struct adf_device *dev,
622 struct adf_overlay_engine *eng, struct adf_interface *intf)
624 struct adf_attachment_list *attachment;
626 mutex_lock(&dev->client_lock);
627 attachment = adf_attachment_find(&dev->attach_allowed, eng, intf);
628 mutex_unlock(&dev->client_lock);
630 return attachment != NULL;
632 EXPORT_SYMBOL(adf_device_attach_allowed);
634 * adf_device_attach - attach an overlay engine to an interface
636 * @dev: the parent device
637 * @eng: the overlay engine
638 * @intf: the interface
640 * Returns 0 on success, -%EINVAL if attaching @intf and @eng is not allowed,
641 * -%EALREADY if @intf and @eng are already attached, or -errno on any other
644 int adf_device_attach(struct adf_device *dev, struct adf_overlay_engine *eng,
645 struct adf_interface *intf)
648 struct adf_attachment_list *attachment = NULL;
650 ret = adf_attachment_validate(dev, eng, intf);
654 mutex_lock(&dev->client_lock);
656 if (dev->n_attached == ADF_MAX_ATTACHMENTS) {
661 if (!adf_attachment_find(&dev->attach_allowed, eng, intf)) {
666 if (adf_attachment_find(&dev->attached, eng, intf)) {
671 ret = adf_device_attach_op(dev, eng, intf);
675 attachment = kzalloc(sizeof(*attachment), GFP_KERNEL);
681 attachment->attachment.interface = intf;
682 attachment->attachment.overlay_engine = eng;
683 list_add_tail(&attachment->head, &dev->attached);
687 mutex_unlock(&dev->client_lock);
693 EXPORT_SYMBOL(adf_device_attach);
696 * adf_device_detach - detach an overlay engine from an interface
698 * @dev: the parent device
699 * @eng: the overlay engine
700 * @intf: the interface
702 * Returns 0 on success, -%EINVAL if @intf and @eng are not attached,
703 * or -errno on any other failure.
705 int adf_device_detach(struct adf_device *dev, struct adf_overlay_engine *eng,
706 struct adf_interface *intf)
709 struct adf_attachment_list *attachment;
711 ret = adf_attachment_validate(dev, eng, intf);
715 mutex_lock(&dev->client_lock);
717 attachment = adf_attachment_find(&dev->attached, eng, intf);
723 ret = adf_device_detach_op(dev, eng, intf);
727 adf_attachment_free(attachment);
730 mutex_unlock(&dev->client_lock);
733 EXPORT_SYMBOL(adf_device_detach);
736 * adf_interface_simple_buffer_alloc - allocate a simple buffer
738 * @intf: target interface
739 * @w: width in pixels
740 * @h: height in pixels
741 * @format: format fourcc
742 * @dma_buf: returns the allocated buffer
743 * @offset: returns the byte offset of the allocated buffer's first pixel
744 * @pitch: returns the allocated buffer's pitch
746 * See &struct adf_simple_buffer_alloc for a description of simple buffers and
749 * Returns 0 on success or -errno on failure.
751 int adf_interface_simple_buffer_alloc(struct adf_interface *intf, u16 w, u16 h,
752 u32 format, struct dma_buf **dma_buf, u32 *offset, u32 *pitch)
754 if (!intf->ops || !intf->ops->alloc_simple_buffer)
757 if (!adf_format_is_rgb(format))
760 return intf->ops->alloc_simple_buffer(intf, w, h, format, dma_buf,
763 EXPORT_SYMBOL(adf_interface_simple_buffer_alloc);
766 * adf_interface_simple_post - flip to a single buffer
768 * @intf: interface targeted by the flip
769 * @buf: buffer to display
771 * adf_interface_simple_post() can be used generically for simple display
772 * configurations, since the client does not need to provide any driver-private
773 * configuration data.
775 * adf_interface_simple_post() has the same copying semantics as
778 * On success, returns a sync fence which signals when the buffer is removed
779 * from the screen. On failure, returns ERR_PTR(-errno).
781 struct sync_fence *adf_interface_simple_post(struct adf_interface *intf,
782 struct adf_buffer *buf)
784 size_t custom_data_size = 0;
785 void *custom_data = NULL;
786 struct sync_fence *ret;
788 if (intf->ops && intf->ops->describe_simple_post) {
791 custom_data = kzalloc(ADF_MAX_CUSTOM_DATA_SIZE, GFP_KERNEL);
793 ret = ERR_PTR(-ENOMEM);
797 err = intf->ops->describe_simple_post(intf, buf, custom_data,
805 ret = adf_device_post(adf_interface_parent(intf), &intf, 1, buf, 1,
806 custom_data, custom_data_size);
811 EXPORT_SYMBOL(adf_interface_simple_post);