1 // SPDX-License-Identifier: GPL-2.0+
3 * vsp1_drm.c -- R-Car VSP1 DRM/KMS Interface
5 * Copyright (C) 2015 Renesas Electronics Corporation
7 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
10 #include <linux/device.h>
11 #include <linux/dma-mapping.h>
12 #include <linux/slab.h>
14 #include <media/media-entity.h>
15 #include <media/v4l2-subdev.h>
16 #include <media/vsp1.h>
23 #include "vsp1_pipe.h"
24 #include "vsp1_rwpf.h"
27 #define BRX_NAME(e) (e)->type == VSP1_ENTITY_BRU ? "BRU" : "BRS"
29 /* -----------------------------------------------------------------------------
33 static void vsp1_du_pipeline_frame_end(struct vsp1_pipeline *pipe,
34 unsigned int completion)
36 struct vsp1_drm_pipeline *drm_pipe = to_vsp1_drm_pipeline(pipe);
38 if (drm_pipe->du_complete) {
39 struct vsp1_entity *uif = drm_pipe->uif;
40 unsigned int status = completion
41 & (VSP1_DU_STATUS_COMPLETE |
42 VSP1_DU_STATUS_WRITEBACK);
45 crc = uif ? vsp1_uif_get_crc(to_uif(&uif->subdev)) : 0;
46 drm_pipe->du_complete(drm_pipe->du_private, status, crc);
49 if (completion & VSP1_DL_FRAME_END_INTERNAL) {
50 drm_pipe->force_brx_release = false;
51 wake_up(&drm_pipe->wait_queue);
55 /* -----------------------------------------------------------------------------
56 * Pipeline Configuration
60 * Insert the UIF in the pipeline between the prev and next entities. If no UIF
61 * is available connect the two entities directly.
63 static int vsp1_du_insert_uif(struct vsp1_device *vsp1,
64 struct vsp1_pipeline *pipe,
65 struct vsp1_entity *uif,
66 struct vsp1_entity *prev, unsigned int prev_pad,
67 struct vsp1_entity *next, unsigned int next_pad)
69 struct v4l2_subdev_format format = {
70 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
76 * If there's no UIF to be inserted, connect the previous and
77 * next entities directly.
80 prev->sink_pad = next_pad;
85 prev->sink_pad = UIF_PAD_SINK;
87 format.pad = prev_pad;
89 ret = v4l2_subdev_call(&prev->subdev, pad, get_fmt, NULL, &format);
93 format.pad = UIF_PAD_SINK;
95 ret = v4l2_subdev_call(&uif->subdev, pad, set_fmt, NULL, &format);
99 dev_dbg(vsp1->dev, "%s: set format %ux%u (%x) on UIF sink\n",
100 __func__, format.format.width, format.format.height,
104 * The UIF doesn't mangle the format between its sink and source pads,
105 * so there is no need to retrieve the format on its source pad.
109 uif->sink_pad = next_pad;
114 /* Setup one RPF and the connected BRx sink pad. */
115 static int vsp1_du_pipeline_setup_rpf(struct vsp1_device *vsp1,
116 struct vsp1_pipeline *pipe,
117 struct vsp1_rwpf *rpf,
118 struct vsp1_entity *uif,
119 unsigned int brx_input)
121 struct v4l2_subdev_selection sel = {
122 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
124 struct v4l2_subdev_format format = {
125 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
127 const struct v4l2_rect *crop;
131 * Configure the format on the RPF sink pad and propagate it up to the
134 crop = &vsp1->drm->inputs[rpf->entity.index].crop;
136 format.pad = RWPF_PAD_SINK;
137 format.format.width = crop->width + crop->left;
138 format.format.height = crop->height + crop->top;
139 format.format.code = rpf->fmtinfo->mbus;
140 format.format.field = V4L2_FIELD_NONE;
142 ret = v4l2_subdev_call(&rpf->entity.subdev, pad, set_fmt, NULL,
148 "%s: set format %ux%u (%x) on RPF%u sink\n",
149 __func__, format.format.width, format.format.height,
150 format.format.code, rpf->entity.index);
152 sel.pad = RWPF_PAD_SINK;
153 sel.target = V4L2_SEL_TGT_CROP;
156 ret = v4l2_subdev_call(&rpf->entity.subdev, pad, set_selection, NULL,
162 "%s: set selection (%u,%u)/%ux%u on RPF%u sink\n",
163 __func__, sel.r.left, sel.r.top, sel.r.width, sel.r.height,
167 * RPF source, hardcode the format to ARGB8888 to turn on format
168 * conversion if needed.
170 format.pad = RWPF_PAD_SOURCE;
172 ret = v4l2_subdev_call(&rpf->entity.subdev, pad, get_fmt, NULL,
178 "%s: got format %ux%u (%x) on RPF%u source\n",
179 __func__, format.format.width, format.format.height,
180 format.format.code, rpf->entity.index);
182 format.format.code = MEDIA_BUS_FMT_ARGB8888_1X32;
184 ret = v4l2_subdev_call(&rpf->entity.subdev, pad, set_fmt, NULL,
189 /* Insert and configure the UIF if available. */
190 ret = vsp1_du_insert_uif(vsp1, pipe, uif, &rpf->entity, RWPF_PAD_SOURCE,
191 pipe->brx, brx_input);
195 /* BRx sink, propagate the format from the RPF source. */
196 format.pad = brx_input;
198 ret = v4l2_subdev_call(&pipe->brx->subdev, pad, set_fmt, NULL,
203 dev_dbg(vsp1->dev, "%s: set format %ux%u (%x) on %s pad %u\n",
204 __func__, format.format.width, format.format.height,
205 format.format.code, BRX_NAME(pipe->brx), format.pad);
208 sel.target = V4L2_SEL_TGT_COMPOSE;
209 sel.r = vsp1->drm->inputs[rpf->entity.index].compose;
211 ret = v4l2_subdev_call(&pipe->brx->subdev, pad, set_selection, NULL,
216 dev_dbg(vsp1->dev, "%s: set selection (%u,%u)/%ux%u on %s pad %u\n",
217 __func__, sel.r.left, sel.r.top, sel.r.width, sel.r.height,
218 BRX_NAME(pipe->brx), sel.pad);
223 /* Setup the BRx source pad. */
224 static int vsp1_du_pipeline_setup_inputs(struct vsp1_device *vsp1,
225 struct vsp1_pipeline *pipe);
226 static void vsp1_du_pipeline_configure(struct vsp1_pipeline *pipe);
228 static int vsp1_du_pipeline_setup_brx(struct vsp1_device *vsp1,
229 struct vsp1_pipeline *pipe)
231 struct vsp1_drm_pipeline *drm_pipe = to_vsp1_drm_pipeline(pipe);
232 struct v4l2_subdev_format format = {
233 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
235 struct vsp1_entity *brx;
240 * - If we need more than two inputs, use the BRU.
241 * - Otherwise, if we are not forced to release our BRx, keep it.
242 * - Else, use any free BRx (randomly starting with the BRU).
244 if (pipe->num_inputs > 2)
245 brx = &vsp1->bru->entity;
246 else if (pipe->brx && !drm_pipe->force_brx_release)
248 else if (vsp1_feature(vsp1, VSP1_HAS_BRU) && !vsp1->bru->entity.pipe)
249 brx = &vsp1->bru->entity;
251 brx = &vsp1->brs->entity;
253 /* Switch BRx if needed. */
254 if (brx != pipe->brx) {
255 struct vsp1_entity *released_brx = NULL;
257 /* Release our BRx if we have one. */
259 dev_dbg(vsp1->dev, "%s: pipe %u: releasing %s\n",
260 __func__, pipe->lif->index,
261 BRX_NAME(pipe->brx));
264 * The BRx might be acquired by the other pipeline in
265 * the next step. We must thus remove it from the list
266 * of entities for this pipeline. The other pipeline's
267 * hardware configuration will reconfigure the BRx
270 * However, if the other pipeline doesn't acquire our
271 * BRx, we need to keep it in the list, otherwise the
272 * hardware configuration step won't disconnect it from
273 * the pipeline. To solve this, store the released BRx
274 * pointer to add it back to the list of entities later
275 * if it isn't acquired by the other pipeline.
277 released_brx = pipe->brx;
279 list_del(&pipe->brx->list_pipe);
280 pipe->brx->sink = NULL;
281 pipe->brx->pipe = NULL;
286 * If the BRx we need is in use, force the owner pipeline to
287 * switch to the other BRx and wait until the switch completes.
290 struct vsp1_drm_pipeline *owner_pipe;
292 dev_dbg(vsp1->dev, "%s: pipe %u: waiting for %s\n",
293 __func__, pipe->lif->index, BRX_NAME(brx));
295 owner_pipe = to_vsp1_drm_pipeline(brx->pipe);
296 owner_pipe->force_brx_release = true;
298 vsp1_du_pipeline_setup_inputs(vsp1, &owner_pipe->pipe);
299 vsp1_du_pipeline_configure(&owner_pipe->pipe);
301 ret = wait_event_timeout(owner_pipe->wait_queue,
302 !owner_pipe->force_brx_release,
303 msecs_to_jiffies(500));
306 "DRM pipeline %u reconfiguration timeout\n",
307 owner_pipe->pipe.lif->index);
311 * If the BRx we have released previously hasn't been acquired
312 * by the other pipeline, add it back to the entities list (with
313 * the pipe pointer NULL) to let vsp1_du_pipeline_configure()
314 * disconnect it from the hardware pipeline.
316 if (released_brx && !released_brx->pipe)
317 list_add_tail(&released_brx->list_pipe,
320 /* Add the BRx to the pipeline. */
321 dev_dbg(vsp1->dev, "%s: pipe %u: acquired %s\n",
322 __func__, pipe->lif->index, BRX_NAME(brx));
325 pipe->brx->pipe = pipe;
326 pipe->brx->sink = &pipe->output->entity;
327 pipe->brx->sink_pad = 0;
329 list_add_tail(&pipe->brx->list_pipe, &pipe->entities);
333 * Configure the format on the BRx source and verify that it matches the
334 * requested format. We don't set the media bus code as it is configured
335 * on the BRx sink pad 0 and propagated inside the entity, not on the
338 format.pad = brx->source_pad;
339 format.format.width = drm_pipe->width;
340 format.format.height = drm_pipe->height;
341 format.format.field = V4L2_FIELD_NONE;
343 ret = v4l2_subdev_call(&brx->subdev, pad, set_fmt, NULL,
348 dev_dbg(vsp1->dev, "%s: set format %ux%u (%x) on %s pad %u\n",
349 __func__, format.format.width, format.format.height,
350 format.format.code, BRX_NAME(brx), brx->source_pad);
352 if (format.format.width != drm_pipe->width ||
353 format.format.height != drm_pipe->height) {
354 dev_dbg(vsp1->dev, "%s: format mismatch\n", __func__);
361 static unsigned int rpf_zpos(struct vsp1_device *vsp1, struct vsp1_rwpf *rpf)
363 return vsp1->drm->inputs[rpf->entity.index].zpos;
366 /* Setup the input side of the pipeline (RPFs and BRx). */
367 static int vsp1_du_pipeline_setup_inputs(struct vsp1_device *vsp1,
368 struct vsp1_pipeline *pipe)
370 struct vsp1_drm_pipeline *drm_pipe = to_vsp1_drm_pipeline(pipe);
371 struct vsp1_rwpf *inputs[VSP1_MAX_RPF] = { NULL, };
372 struct vsp1_entity *uif;
373 bool use_uif = false;
374 struct vsp1_brx *brx;
378 /* Count the number of enabled inputs and sort them by Z-order. */
379 pipe->num_inputs = 0;
381 for (i = 0; i < vsp1->info->rpf_count; ++i) {
382 struct vsp1_rwpf *rpf = vsp1->rpf[i];
385 if (!pipe->inputs[i])
388 /* Insert the RPF in the sorted RPFs array. */
389 for (j = pipe->num_inputs++; j > 0; --j) {
390 if (rpf_zpos(vsp1, inputs[j-1]) <= rpf_zpos(vsp1, rpf))
392 inputs[j] = inputs[j-1];
399 * Setup the BRx. This must be done before setting up the RPF input
400 * pipelines as the BRx sink compose rectangles depend on the BRx source
403 ret = vsp1_du_pipeline_setup_brx(vsp1, pipe);
405 dev_err(vsp1->dev, "%s: failed to setup %s source\n", __func__,
406 BRX_NAME(pipe->brx));
410 brx = to_brx(&pipe->brx->subdev);
412 /* Setup the RPF input pipeline for every enabled input. */
413 for (i = 0; i < pipe->brx->source_pad; ++i) {
414 struct vsp1_rwpf *rpf = inputs[i];
417 brx->inputs[i].rpf = NULL;
421 if (!rpf->entity.pipe) {
422 rpf->entity.pipe = pipe;
423 list_add_tail(&rpf->entity.list_pipe, &pipe->entities);
426 brx->inputs[i].rpf = rpf;
428 rpf->entity.sink = pipe->brx;
429 rpf->entity.sink_pad = i;
431 dev_dbg(vsp1->dev, "%s: connecting RPF.%u to %s:%u\n",
432 __func__, rpf->entity.index, BRX_NAME(pipe->brx), i);
434 uif = drm_pipe->crc.source == VSP1_DU_CRC_PLANE &&
435 drm_pipe->crc.index == i ? drm_pipe->uif : NULL;
438 ret = vsp1_du_pipeline_setup_rpf(vsp1, pipe, rpf, uif, i);
441 "%s: failed to setup RPF.%u\n",
442 __func__, rpf->entity.index);
447 /* Insert and configure the UIF at the BRx output if available. */
448 uif = drm_pipe->crc.source == VSP1_DU_CRC_OUTPUT ? drm_pipe->uif : NULL;
451 ret = vsp1_du_insert_uif(vsp1, pipe, uif,
452 pipe->brx, pipe->brx->source_pad,
453 &pipe->output->entity, 0);
455 dev_err(vsp1->dev, "%s: failed to setup UIF after %s\n",
456 __func__, BRX_NAME(pipe->brx));
458 /* If the DRM pipe does not have a UIF there is nothing we can update. */
463 * If the UIF is not in use schedule it for removal by setting its pipe
464 * pointer to NULL, vsp1_du_pipeline_configure() will remove it from the
465 * hardware pipeline and from the pipeline's list of entities. Otherwise
466 * make sure it is present in the pipeline's list of entities if it
470 drm_pipe->uif->pipe = NULL;
471 } else if (!drm_pipe->uif->pipe) {
472 drm_pipe->uif->pipe = pipe;
473 list_add_tail(&drm_pipe->uif->list_pipe, &pipe->entities);
479 /* Setup the output side of the pipeline (WPF and LIF). */
480 static int vsp1_du_pipeline_setup_output(struct vsp1_device *vsp1,
481 struct vsp1_pipeline *pipe)
483 struct vsp1_drm_pipeline *drm_pipe = to_vsp1_drm_pipeline(pipe);
484 struct v4l2_subdev_format format = {
485 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
489 format.pad = RWPF_PAD_SINK;
490 format.format.width = drm_pipe->width;
491 format.format.height = drm_pipe->height;
492 format.format.code = MEDIA_BUS_FMT_ARGB8888_1X32;
493 format.format.field = V4L2_FIELD_NONE;
495 ret = v4l2_subdev_call(&pipe->output->entity.subdev, pad, set_fmt, NULL,
500 dev_dbg(vsp1->dev, "%s: set format %ux%u (%x) on WPF%u sink\n",
501 __func__, format.format.width, format.format.height,
502 format.format.code, pipe->output->entity.index);
504 format.pad = RWPF_PAD_SOURCE;
505 ret = v4l2_subdev_call(&pipe->output->entity.subdev, pad, get_fmt, NULL,
510 dev_dbg(vsp1->dev, "%s: got format %ux%u (%x) on WPF%u source\n",
511 __func__, format.format.width, format.format.height,
512 format.format.code, pipe->output->entity.index);
514 format.pad = LIF_PAD_SINK;
515 ret = v4l2_subdev_call(&pipe->lif->subdev, pad, set_fmt, NULL,
520 dev_dbg(vsp1->dev, "%s: set format %ux%u (%x) on LIF%u sink\n",
521 __func__, format.format.width, format.format.height,
522 format.format.code, pipe->lif->index);
525 * Verify that the format at the output of the pipeline matches the
526 * requested frame size and media bus code.
528 if (format.format.width != drm_pipe->width ||
529 format.format.height != drm_pipe->height ||
530 format.format.code != MEDIA_BUS_FMT_ARGB8888_1X32) {
531 dev_dbg(vsp1->dev, "%s: format mismatch on LIF%u\n", __func__,
539 /* Configure all entities in the pipeline. */
540 static void vsp1_du_pipeline_configure(struct vsp1_pipeline *pipe)
542 struct vsp1_drm_pipeline *drm_pipe = to_vsp1_drm_pipeline(pipe);
543 struct vsp1_entity *entity;
544 struct vsp1_entity *next;
545 struct vsp1_dl_list *dl;
546 struct vsp1_dl_body *dlb;
547 unsigned int dl_flags = 0;
549 if (drm_pipe->force_brx_release)
550 dl_flags |= VSP1_DL_FRAME_END_INTERNAL;
551 if (pipe->output->writeback)
552 dl_flags |= VSP1_DL_FRAME_END_WRITEBACK;
554 dl = vsp1_dl_list_get(pipe->output->dlm);
555 dlb = vsp1_dl_list_get_body0(dl);
557 list_for_each_entry_safe(entity, next, &pipe->entities, list_pipe) {
558 /* Disconnect unused entities from the pipeline. */
560 vsp1_dl_body_write(dlb, entity->route->reg,
561 VI6_DPR_NODE_UNUSED);
564 list_del(&entity->list_pipe);
569 vsp1_entity_route_setup(entity, pipe, dlb);
570 vsp1_entity_configure_stream(entity, pipe, dl, dlb);
571 vsp1_entity_configure_frame(entity, pipe, dl, dlb);
572 vsp1_entity_configure_partition(entity, pipe, dl, dlb);
575 vsp1_dl_list_commit(dl, dl_flags);
578 static int vsp1_du_pipeline_set_rwpf_format(struct vsp1_device *vsp1,
579 struct vsp1_rwpf *rwpf,
580 u32 pixelformat, unsigned int pitch)
582 const struct vsp1_format_info *fmtinfo;
583 unsigned int chroma_hsub;
585 fmtinfo = vsp1_get_format_info(vsp1, pixelformat);
587 dev_dbg(vsp1->dev, "Unsupported pixel format %08x\n",
593 * Only formats with three planes can affect the chroma planes pitch.
594 * All formats with two planes have a horizontal subsampling value of 2,
595 * but combine U and V in a single chroma plane, which thus results in
596 * the luma plane and chroma plane having the same pitch.
598 chroma_hsub = (fmtinfo->planes == 3) ? fmtinfo->hsub : 1;
600 rwpf->fmtinfo = fmtinfo;
601 rwpf->format.num_planes = fmtinfo->planes;
602 rwpf->format.plane_fmt[0].bytesperline = pitch;
603 rwpf->format.plane_fmt[1].bytesperline = pitch / chroma_hsub;
608 /* -----------------------------------------------------------------------------
612 int vsp1_du_init(struct device *dev)
614 struct vsp1_device *vsp1 = dev_get_drvdata(dev);
617 return -EPROBE_DEFER;
621 EXPORT_SYMBOL_GPL(vsp1_du_init);
624 * vsp1_du_setup_lif - Setup the output part of the VSP pipeline
625 * @dev: the VSP device
626 * @pipe_index: the DRM pipeline index
627 * @cfg: the LIF configuration
629 * Configure the output part of VSP DRM pipeline for the given frame @cfg.width
630 * and @cfg.height. This sets up formats on the BRx source pad, the WPF sink and
631 * source pads, and the LIF sink pad.
633 * The @pipe_index argument selects which DRM pipeline to setup. The number of
634 * available pipelines depend on the VSP instance.
636 * As the media bus code on the blend unit source pad is conditioned by the
637 * configuration of its sink 0 pad, we also set up the formats on all blend unit
638 * sinks, even if the configuration will be overwritten later by
639 * vsp1_du_setup_rpf(). This ensures that the blend unit configuration is set to
640 * a well defined state.
642 * Return 0 on success or a negative error code on failure.
644 int vsp1_du_setup_lif(struct device *dev, unsigned int pipe_index,
645 const struct vsp1_du_lif_config *cfg)
647 struct vsp1_device *vsp1 = dev_get_drvdata(dev);
648 struct vsp1_drm_pipeline *drm_pipe;
649 struct vsp1_pipeline *pipe;
654 if (pipe_index >= vsp1->info->lif_count)
657 drm_pipe = &vsp1->drm->pipe[pipe_index];
658 pipe = &drm_pipe->pipe;
661 struct vsp1_brx *brx;
663 mutex_lock(&vsp1->drm->lock);
665 brx = to_brx(&pipe->brx->subdev);
668 * NULL configuration means the CRTC is being disabled, stop
669 * the pipeline and turn the light off.
671 ret = vsp1_pipeline_stop(pipe);
672 if (ret == -ETIMEDOUT)
673 dev_err(vsp1->dev, "DRM pipeline stop timeout\n");
675 for (i = 0; i < ARRAY_SIZE(pipe->inputs); ++i) {
676 struct vsp1_rwpf *rpf = pipe->inputs[i];
682 * Remove the RPF from the pipe and the list of BRx
685 WARN_ON(!rpf->entity.pipe);
686 rpf->entity.pipe = NULL;
687 list_del(&rpf->entity.list_pipe);
688 pipe->inputs[i] = NULL;
690 brx->inputs[rpf->brx_input].rpf = NULL;
693 drm_pipe->du_complete = NULL;
694 pipe->num_inputs = 0;
696 dev_dbg(vsp1->dev, "%s: pipe %u: releasing %s\n",
697 __func__, pipe->lif->index,
698 BRX_NAME(pipe->brx));
700 list_del(&pipe->brx->list_pipe);
701 pipe->brx->pipe = NULL;
704 mutex_unlock(&vsp1->drm->lock);
706 vsp1_dlm_reset(pipe->output->dlm);
707 vsp1_device_put(vsp1);
709 dev_dbg(vsp1->dev, "%s: pipeline disabled\n", __func__);
714 /* Reset the underrun counter */
715 pipe->underrun_count = 0;
717 drm_pipe->width = cfg->width;
718 drm_pipe->height = cfg->height;
719 pipe->interlaced = cfg->interlaced;
721 dev_dbg(vsp1->dev, "%s: configuring LIF%u with format %ux%u%s\n",
722 __func__, pipe_index, cfg->width, cfg->height,
723 pipe->interlaced ? "i" : "");
725 mutex_lock(&vsp1->drm->lock);
727 /* Setup formats through the pipeline. */
728 ret = vsp1_du_pipeline_setup_inputs(vsp1, pipe);
732 ret = vsp1_du_pipeline_setup_output(vsp1, pipe);
736 /* Enable the VSP1. */
737 ret = vsp1_device_get(vsp1);
742 * Register a callback to allow us to notify the DRM driver of frame
745 drm_pipe->du_complete = cfg->callback;
746 drm_pipe->du_private = cfg->callback_data;
748 /* Disable the display interrupts. */
749 vsp1_write(vsp1, VI6_DISP_IRQ_STA(pipe_index), 0);
750 vsp1_write(vsp1, VI6_DISP_IRQ_ENB(pipe_index), 0);
752 /* Configure all entities in the pipeline. */
753 vsp1_du_pipeline_configure(pipe);
756 mutex_unlock(&vsp1->drm->lock);
761 /* Start the pipeline. */
762 spin_lock_irqsave(&pipe->irqlock, flags);
763 vsp1_pipeline_run(pipe);
764 spin_unlock_irqrestore(&pipe->irqlock, flags);
766 dev_dbg(vsp1->dev, "%s: pipeline enabled\n", __func__);
770 EXPORT_SYMBOL_GPL(vsp1_du_setup_lif);
773 * vsp1_du_atomic_begin - Prepare for an atomic update
774 * @dev: the VSP device
775 * @pipe_index: the DRM pipeline index
777 void vsp1_du_atomic_begin(struct device *dev, unsigned int pipe_index)
780 EXPORT_SYMBOL_GPL(vsp1_du_atomic_begin);
783 * vsp1_du_atomic_update - Setup one RPF input of the VSP pipeline
784 * @dev: the VSP device
785 * @pipe_index: the DRM pipeline index
786 * @rpf_index: index of the RPF to setup (0-based)
787 * @cfg: the RPF configuration
789 * Configure the VSP to perform image composition through RPF @rpf_index as
790 * described by the @cfg configuration. The image to compose is referenced by
791 * @cfg.mem and composed using the @cfg.src crop rectangle and the @cfg.dst
792 * composition rectangle. The Z-order is configurable with higher @zpos values
795 * If the @cfg configuration is NULL, the RPF will be disabled. Calling the
796 * function on a disabled RPF is allowed.
798 * Image format as stored in memory is expressed as a V4L2 @cfg.pixelformat
799 * value. The memory pitch is configurable to allow for padding at end of lines,
800 * or simply for images that extend beyond the crop rectangle boundaries. The
801 * @cfg.pitch value is expressed in bytes and applies to all planes for
802 * multiplanar formats.
804 * The source memory buffer is referenced by the DMA address of its planes in
805 * the @cfg.mem array. Up to two planes are supported. The second plane DMA
806 * address is ignored for formats using a single plane.
808 * This function isn't reentrant, the caller needs to serialize calls.
810 * Return 0 on success or a negative error code on failure.
812 int vsp1_du_atomic_update(struct device *dev, unsigned int pipe_index,
813 unsigned int rpf_index,
814 const struct vsp1_du_atomic_config *cfg)
816 struct vsp1_device *vsp1 = dev_get_drvdata(dev);
817 struct vsp1_drm_pipeline *drm_pipe = &vsp1->drm->pipe[pipe_index];
818 struct vsp1_rwpf *rpf;
821 if (rpf_index >= vsp1->info->rpf_count)
824 rpf = vsp1->rpf[rpf_index];
827 dev_dbg(vsp1->dev, "%s: RPF%u: disable requested\n", __func__,
831 * Remove the RPF from the pipeline's inputs. Keep it in the
832 * pipeline's entity list to let vsp1_du_pipeline_configure()
833 * remove it from the hardware pipeline.
835 rpf->entity.pipe = NULL;
836 drm_pipe->pipe.inputs[rpf_index] = NULL;
841 "%s: RPF%u: (%u,%u)/%ux%u -> (%u,%u)/%ux%u (%08x), pitch %u dma { %pad, %pad, %pad } zpos %u\n",
843 cfg->src.left, cfg->src.top, cfg->src.width, cfg->src.height,
844 cfg->dst.left, cfg->dst.top, cfg->dst.width, cfg->dst.height,
845 cfg->pixelformat, cfg->pitch, &cfg->mem[0], &cfg->mem[1],
846 &cfg->mem[2], cfg->zpos);
849 * Store the format, stride, memory buffer address, crop and compose
850 * rectangles and Z-order position and for the input.
852 ret = vsp1_du_pipeline_set_rwpf_format(vsp1, rpf, cfg->pixelformat,
857 rpf->alpha = cfg->alpha;
859 rpf->mem.addr[0] = cfg->mem[0];
860 rpf->mem.addr[1] = cfg->mem[1];
861 rpf->mem.addr[2] = cfg->mem[2];
863 rpf->format.flags = cfg->premult ? V4L2_PIX_FMT_FLAG_PREMUL_ALPHA : 0;
865 vsp1->drm->inputs[rpf_index].crop = cfg->src;
866 vsp1->drm->inputs[rpf_index].compose = cfg->dst;
867 vsp1->drm->inputs[rpf_index].zpos = cfg->zpos;
869 drm_pipe->pipe.inputs[rpf_index] = rpf;
873 EXPORT_SYMBOL_GPL(vsp1_du_atomic_update);
876 * vsp1_du_atomic_flush - Commit an atomic update
877 * @dev: the VSP device
878 * @pipe_index: the DRM pipeline index
879 * @cfg: atomic pipe configuration
881 void vsp1_du_atomic_flush(struct device *dev, unsigned int pipe_index,
882 const struct vsp1_du_atomic_pipe_config *cfg)
884 struct vsp1_device *vsp1 = dev_get_drvdata(dev);
885 struct vsp1_drm_pipeline *drm_pipe = &vsp1->drm->pipe[pipe_index];
886 struct vsp1_pipeline *pipe = &drm_pipe->pipe;
889 drm_pipe->crc = cfg->crc;
891 mutex_lock(&vsp1->drm->lock);
893 if (cfg->writeback.pixelformat) {
894 const struct vsp1_du_writeback_config *wb_cfg = &cfg->writeback;
896 ret = vsp1_du_pipeline_set_rwpf_format(vsp1, pipe->output,
899 if (WARN_ON(ret < 0))
902 pipe->output->mem.addr[0] = wb_cfg->mem[0];
903 pipe->output->mem.addr[1] = wb_cfg->mem[1];
904 pipe->output->mem.addr[2] = wb_cfg->mem[2];
905 pipe->output->writeback = true;
908 vsp1_du_pipeline_setup_inputs(vsp1, pipe);
909 vsp1_du_pipeline_configure(pipe);
912 mutex_unlock(&vsp1->drm->lock);
914 EXPORT_SYMBOL_GPL(vsp1_du_atomic_flush);
916 int vsp1_du_map_sg(struct device *dev, struct sg_table *sgt)
918 struct vsp1_device *vsp1 = dev_get_drvdata(dev);
921 * As all the buffers allocated by the DU driver are coherent, we can
922 * skip cache sync. This will need to be revisited when support for
923 * non-coherent buffers will be added to the DU driver.
925 return dma_map_sgtable(vsp1->bus_master, sgt, DMA_TO_DEVICE,
926 DMA_ATTR_SKIP_CPU_SYNC);
928 EXPORT_SYMBOL_GPL(vsp1_du_map_sg);
930 void vsp1_du_unmap_sg(struct device *dev, struct sg_table *sgt)
932 struct vsp1_device *vsp1 = dev_get_drvdata(dev);
934 dma_unmap_sgtable(vsp1->bus_master, sgt, DMA_TO_DEVICE,
935 DMA_ATTR_SKIP_CPU_SYNC);
937 EXPORT_SYMBOL_GPL(vsp1_du_unmap_sg);
939 /* -----------------------------------------------------------------------------
943 int vsp1_drm_init(struct vsp1_device *vsp1)
947 vsp1->drm = devm_kzalloc(vsp1->dev, sizeof(*vsp1->drm), GFP_KERNEL);
951 mutex_init(&vsp1->drm->lock);
953 /* Create one DRM pipeline per LIF. */
954 for (i = 0; i < vsp1->info->lif_count; ++i) {
955 struct vsp1_drm_pipeline *drm_pipe = &vsp1->drm->pipe[i];
956 struct vsp1_pipeline *pipe = &drm_pipe->pipe;
958 init_waitqueue_head(&drm_pipe->wait_queue);
960 vsp1_pipeline_init(pipe);
962 pipe->frame_end = vsp1_du_pipeline_frame_end;
965 * The output side of the DRM pipeline is static, add the
966 * corresponding entities manually.
968 pipe->output = vsp1->wpf[i];
969 pipe->lif = &vsp1->lif[i]->entity;
971 pipe->output->entity.pipe = pipe;
972 pipe->output->entity.sink = pipe->lif;
973 pipe->output->entity.sink_pad = 0;
974 list_add_tail(&pipe->output->entity.list_pipe, &pipe->entities);
976 pipe->lif->pipe = pipe;
977 list_add_tail(&pipe->lif->list_pipe, &pipe->entities);
980 * CRC computation is initially disabled, don't add the UIF to
983 if (i < vsp1->info->uif_count)
984 drm_pipe->uif = &vsp1->uif[i]->entity;
987 /* Disable all RPFs initially. */
988 for (i = 0; i < vsp1->info->rpf_count; ++i) {
989 struct vsp1_rwpf *input = vsp1->rpf[i];
991 INIT_LIST_HEAD(&input->entity.list_pipe);
997 void vsp1_drm_cleanup(struct vsp1_device *vsp1)
999 mutex_destroy(&vsp1->drm->lock);