--- /dev/null
+/*
+ * vsp1_video.c -- R-Car VSP1 Video Node
+ *
+ * Copyright (C) 2013-2014 Renesas Electronics Corporation
+ *
+ * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/v4l2-mediabus.h>
+#include <linux/videodev2.h>
+
+#include <media/media-entity.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-subdev.h>
+#include <media/videobuf2-core.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "vsp1.h"
+#include "vsp1_bru.h"
+#include "vsp1_entity.h"
+#include "vsp1_rwpf.h"
+#include "vsp1_uds.h"
+#include "vsp1_video.h"
+
+#define VSP1_VIDEO_DEF_FORMAT V4L2_PIX_FMT_YUYV
+#define VSP1_VIDEO_DEF_WIDTH 1024
+#define VSP1_VIDEO_DEF_HEIGHT 768
+
+#define VSP1_VIDEO_MIN_WIDTH 2U
+#define VSP1_VIDEO_MAX_WIDTH 8190U
+#define VSP1_VIDEO_MIN_HEIGHT 2U
+#define VSP1_VIDEO_MAX_HEIGHT 8190U
+
+/* -----------------------------------------------------------------------------
+ * Helper functions
+ */
+
+static const struct vsp1_format_info vsp1_video_formats[] = {
+ { V4L2_PIX_FMT_RGB332, MEDIA_BUS_FMT_ARGB8888_1X32,
+ VI6_FMT_RGB_332, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+ VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
+ 1, { 8, 0, 0 }, false, false, 1, 1, false },
+ { V4L2_PIX_FMT_ARGB444, MEDIA_BUS_FMT_ARGB8888_1X32,
+ VI6_FMT_ARGB_4444, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+ VI6_RPF_DSWAP_P_WDS,
+ 1, { 16, 0, 0 }, false, false, 1, 1, true },
+ { V4L2_PIX_FMT_XRGB444, MEDIA_BUS_FMT_ARGB8888_1X32,
+ VI6_FMT_XRGB_4444, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+ VI6_RPF_DSWAP_P_WDS,
+ 1, { 16, 0, 0 }, false, false, 1, 1, true },
+ { V4L2_PIX_FMT_ARGB555, MEDIA_BUS_FMT_ARGB8888_1X32,
+ VI6_FMT_ARGB_1555, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+ VI6_RPF_DSWAP_P_WDS,
+ 1, { 16, 0, 0 }, false, false, 1, 1, true },
+ { V4L2_PIX_FMT_XRGB555, MEDIA_BUS_FMT_ARGB8888_1X32,
+ VI6_FMT_XRGB_1555, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+ VI6_RPF_DSWAP_P_WDS,
+ 1, { 16, 0, 0 }, false, false, 1, 1, false },
+ { V4L2_PIX_FMT_RGB565, MEDIA_BUS_FMT_ARGB8888_1X32,
+ VI6_FMT_RGB_565, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+ VI6_RPF_DSWAP_P_WDS,
+ 1, { 16, 0, 0 }, false, false, 1, 1, false },
+ { V4L2_PIX_FMT_BGR24, MEDIA_BUS_FMT_ARGB8888_1X32,
+ VI6_FMT_BGR_888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+ VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
+ 1, { 24, 0, 0 }, false, false, 1, 1, false },
+ { V4L2_PIX_FMT_RGB24, MEDIA_BUS_FMT_ARGB8888_1X32,
+ VI6_FMT_RGB_888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+ VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
+ 1, { 24, 0, 0 }, false, false, 1, 1, false },
+ { V4L2_PIX_FMT_ABGR32, MEDIA_BUS_FMT_ARGB8888_1X32,
+ VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS,
+ 1, { 32, 0, 0 }, false, false, 1, 1, true },
+ { V4L2_PIX_FMT_XBGR32, MEDIA_BUS_FMT_ARGB8888_1X32,
+ VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS,
+ 1, { 32, 0, 0 }, false, false, 1, 1, false },
+ { V4L2_PIX_FMT_ARGB32, MEDIA_BUS_FMT_ARGB8888_1X32,
+ VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+ VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
+ 1, { 32, 0, 0 }, false, false, 1, 1, true },
+ { V4L2_PIX_FMT_XRGB32, MEDIA_BUS_FMT_ARGB8888_1X32,
+ VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+ VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
+ 1, { 32, 0, 0 }, false, false, 1, 1, false },
+ { V4L2_PIX_FMT_UYVY, MEDIA_BUS_FMT_AYUV8_1X32,
+ VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+ VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
+ 1, { 16, 0, 0 }, false, false, 2, 1, false },
+ { V4L2_PIX_FMT_VYUY, MEDIA_BUS_FMT_AYUV8_1X32,
+ VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+ VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
+ 1, { 16, 0, 0 }, false, true, 2, 1, false },
+ { V4L2_PIX_FMT_YUYV, MEDIA_BUS_FMT_AYUV8_1X32,
+ VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+ VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
+ 1, { 16, 0, 0 }, true, false, 2, 1, false },
+ { V4L2_PIX_FMT_YVYU, MEDIA_BUS_FMT_AYUV8_1X32,
+ VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+ VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
+ 1, { 16, 0, 0 }, true, true, 2, 1, false },
+ { V4L2_PIX_FMT_NV12M, MEDIA_BUS_FMT_AYUV8_1X32,
+ VI6_FMT_Y_UV_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+ VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
+ 2, { 8, 16, 0 }, false, false, 2, 2, false },
+ { V4L2_PIX_FMT_NV21M, MEDIA_BUS_FMT_AYUV8_1X32,
+ VI6_FMT_Y_UV_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+ VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
+ 2, { 8, 16, 0 }, false, true, 2, 2, false },
+ { V4L2_PIX_FMT_NV16M, MEDIA_BUS_FMT_AYUV8_1X32,
+ VI6_FMT_Y_UV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+ VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
+ 2, { 8, 16, 0 }, false, false, 2, 1, false },
+ { V4L2_PIX_FMT_NV61M, MEDIA_BUS_FMT_AYUV8_1X32,
+ VI6_FMT_Y_UV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+ VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
+ 2, { 8, 16, 0 }, false, true, 2, 1, false },
+ { V4L2_PIX_FMT_YUV420M, MEDIA_BUS_FMT_AYUV8_1X32,
+ VI6_FMT_Y_U_V_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
+ VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
+ 3, { 8, 8, 8 }, false, false, 2, 2, false },
+};
+
+/*
+ * vsp1_get_format_info - Retrieve format information for a 4CC
+ * @fourcc: the format 4CC
+ *
+ * Return a pointer to the format information structure corresponding to the
+ * given V4L2 format 4CC, or NULL if no corresponding format can be found.
+ */
+static const struct vsp1_format_info *vsp1_get_format_info(u32 fourcc)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(vsp1_video_formats); ++i) {
+ const struct vsp1_format_info *info = &vsp1_video_formats[i];
+
+ if (info->fourcc == fourcc)
+ return info;
+ }
+
+ return NULL;
+}
+
+
+static struct v4l2_subdev *
+vsp1_video_remote_subdev(struct media_pad *local, u32 *pad)
+{
+ struct media_pad *remote;
+
+ remote = media_entity_remote_pad(local);
+ if (remote == NULL ||
+ media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
+ return NULL;
+
+ if (pad)
+ *pad = remote->index;
+
+ return media_entity_to_v4l2_subdev(remote->entity);
+}
+
+static int vsp1_video_verify_format(struct vsp1_video *video)
+{
+ struct v4l2_subdev_format fmt;
+ struct v4l2_subdev *subdev;
+ int ret;
+
+ subdev = vsp1_video_remote_subdev(&video->pad, &fmt.pad);
+ if (subdev == NULL)
+ return -EINVAL;
+
+ fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+ ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
+ if (ret < 0)
+ return ret == -ENOIOCTLCMD ? -EINVAL : ret;
+
+ if (video->fmtinfo->mbus != fmt.format.code ||
+ video->format.height != fmt.format.height ||
+ video->format.width != fmt.format.width)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int __vsp1_video_try_format(struct vsp1_video *video,
+ struct v4l2_pix_format_mplane *pix,
+ const struct vsp1_format_info **fmtinfo)
+{
+ static const u32 xrgb_formats[][2] = {
+ { V4L2_PIX_FMT_RGB444, V4L2_PIX_FMT_XRGB444 },
+ { V4L2_PIX_FMT_RGB555, V4L2_PIX_FMT_XRGB555 },
+ { V4L2_PIX_FMT_BGR32, V4L2_PIX_FMT_XBGR32 },
+ { V4L2_PIX_FMT_RGB32, V4L2_PIX_FMT_XRGB32 },
+ };
+
+ const struct vsp1_format_info *info;
+ unsigned int width = pix->width;
+ unsigned int height = pix->height;
+ unsigned int i;
+
+ /* Backward compatibility: replace deprecated RGB formats by their XRGB
+ * equivalent. This selects the format older userspace applications want
+ * while still exposing the new format.
+ */
+ for (i = 0; i < ARRAY_SIZE(xrgb_formats); ++i) {
+ if (xrgb_formats[i][0] == pix->pixelformat) {
+ pix->pixelformat = xrgb_formats[i][1];
+ break;
+ }
+ }
+
+ /* Retrieve format information and select the default format if the
+ * requested format isn't supported.
+ */
+ info = vsp1_get_format_info(pix->pixelformat);
+ if (info == NULL)
+ info = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
+
+ pix->pixelformat = info->fourcc;
+ pix->colorspace = V4L2_COLORSPACE_SRGB;
+ pix->field = V4L2_FIELD_NONE;
+ memset(pix->reserved, 0, sizeof(pix->reserved));
+
+ /* Align the width and height for YUV 4:2:2 and 4:2:0 formats. */
+ width = round_down(width, info->hsub);
+ height = round_down(height, info->vsub);
+
+ /* Clamp the width and height. */
+ pix->width = clamp(width, VSP1_VIDEO_MIN_WIDTH, VSP1_VIDEO_MAX_WIDTH);
+ pix->height = clamp(height, VSP1_VIDEO_MIN_HEIGHT,
+ VSP1_VIDEO_MAX_HEIGHT);
+
+ /* Compute and clamp the stride and image size. While not documented in
+ * the datasheet, strides not aligned to a multiple of 128 bytes result
+ * in image corruption.
+ */
+ for (i = 0; i < max(info->planes, 2U); ++i) {
+ unsigned int hsub = i > 0 ? info->hsub : 1;
+ unsigned int vsub = i > 0 ? info->vsub : 1;
+ unsigned int align = 128;
+ unsigned int bpl;
+
+ bpl = clamp_t(unsigned int, pix->plane_fmt[i].bytesperline,
+ pix->width / hsub * info->bpp[i] / 8,
+ round_down(65535U, align));
+
+ pix->plane_fmt[i].bytesperline = round_up(bpl, align);
+ pix->plane_fmt[i].sizeimage = pix->plane_fmt[i].bytesperline
+ * pix->height / vsub;
+ }
+
+ if (info->planes == 3) {
+ /* The second and third planes must have the same stride. */
+ pix->plane_fmt[2].bytesperline = pix->plane_fmt[1].bytesperline;
+ pix->plane_fmt[2].sizeimage = pix->plane_fmt[1].sizeimage;
+ }
+
+ pix->num_planes = info->planes;
+
+ if (fmtinfo)
+ *fmtinfo = info;
+
+ return 0;
+}
+
+static bool
+vsp1_video_format_adjust(struct vsp1_video *video,
+ const struct v4l2_pix_format_mplane *format,
+ struct v4l2_pix_format_mplane *adjust)
+{
+ unsigned int i;
+
+ *adjust = *format;
+ __vsp1_video_try_format(video, adjust, NULL);
+
+ if (format->width != adjust->width ||
+ format->height != adjust->height ||
+ format->pixelformat != adjust->pixelformat ||
+ format->num_planes != adjust->num_planes)
+ return false;
+
+ for (i = 0; i < format->num_planes; ++i) {
+ if (format->plane_fmt[i].bytesperline !=
+ adjust->plane_fmt[i].bytesperline)
+ return false;
+
+ adjust->plane_fmt[i].sizeimage =
+ max(adjust->plane_fmt[i].sizeimage,
+ format->plane_fmt[i].sizeimage);
+ }
+
+ return true;
+}
+
+/* -----------------------------------------------------------------------------
+ * Pipeline Management
+ */
+
+static int vsp1_pipeline_validate_branch(struct vsp1_pipeline *pipe,
+ struct vsp1_rwpf *input,
+ struct vsp1_rwpf *output)
+{
+ struct vsp1_entity *entity;
+ unsigned int entities = 0;
+ struct media_pad *pad;
+ bool bru_found = false;
+
+ input->location.left = 0;
+ input->location.top = 0;
+
+ pad = media_entity_remote_pad(&input->entity.pads[RWPF_PAD_SOURCE]);
+
+ while (1) {
+ if (pad == NULL)
+ return -EPIPE;
+
+ /* We've reached a video node, that shouldn't have happened. */
+ if (media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
+ return -EPIPE;
+
+ entity = to_vsp1_entity(media_entity_to_v4l2_subdev(pad->entity));
+
+ /* A BRU is present in the pipeline, store the compose rectangle
+ * location in the input RPF for use when configuring the RPF.
+ */
+ if (entity->type == VSP1_ENTITY_BRU) {
+ struct vsp1_bru *bru = to_bru(&entity->subdev);
+ struct v4l2_rect *rect =
+ &bru->inputs[pad->index].compose;
+
+ bru->inputs[pad->index].rpf = input;
+
+ input->location.left = rect->left;
+ input->location.top = rect->top;
+
+ bru_found = true;
+ }
+
+ /* We've reached the WPF, we're done. */
+ if (entity->type == VSP1_ENTITY_WPF)
+ break;
+
+ /* Ensure the branch has no loop. */
+ if (entities & (1 << entity->subdev.entity.id))
+ return -EPIPE;
+
+ entities |= 1 << entity->subdev.entity.id;
+
+ /* UDS can't be chained. */
+ if (entity->type == VSP1_ENTITY_UDS) {
+ if (pipe->uds)
+ return -EPIPE;
+
+ pipe->uds = entity;
+ pipe->uds_input = bru_found ? pipe->bru
+ : &input->entity;
+ }
+
+ /* Follow the source link. The link setup operations ensure
+ * that the output fan-out can't be more than one, there is thus
+ * no need to verify here that only a single source link is
+ * activated.
+ */
+ pad = &entity->pads[entity->source_pad];
+ pad = media_entity_remote_pad(pad);
+ }
+
+ /* The last entity must be the output WPF. */
+ if (entity != &output->entity)
+ return -EPIPE;
+
+ return 0;
+}
+
+static void __vsp1_pipeline_cleanup(struct vsp1_pipeline *pipe)
+{
+ if (pipe->bru) {
+ struct vsp1_bru *bru = to_bru(&pipe->bru->subdev);
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(bru->inputs); ++i)
+ bru->inputs[i].rpf = NULL;
+ }
+
+ INIT_LIST_HEAD(&pipe->entities);
+ pipe->state = VSP1_PIPELINE_STOPPED;
+ pipe->buffers_ready = 0;
+ pipe->num_video = 0;
+ pipe->num_inputs = 0;
+ pipe->output = NULL;
+ pipe->bru = NULL;
+ pipe->lif = NULL;
+ pipe->uds = NULL;
+}
+
+static int vsp1_pipeline_validate(struct vsp1_pipeline *pipe,
+ struct vsp1_video *video)
+{
+ struct media_entity_graph graph;
+ struct media_entity *entity = &video->video.entity;
+ struct media_device *mdev = entity->parent;
+ unsigned int i;
+ int ret;
+
+ mutex_lock(&mdev->graph_mutex);
+
+ /* Walk the graph to locate the entities and video nodes. */
+ media_entity_graph_walk_start(&graph, entity);
+
+ while ((entity = media_entity_graph_walk_next(&graph))) {
+ struct v4l2_subdev *subdev;
+ struct vsp1_rwpf *rwpf;
+ struct vsp1_entity *e;
+
+ if (media_entity_type(entity) != MEDIA_ENT_T_V4L2_SUBDEV) {
+ pipe->num_video++;
+ continue;
+ }
+
+ subdev = media_entity_to_v4l2_subdev(entity);
+ e = to_vsp1_entity(subdev);
+ list_add_tail(&e->list_pipe, &pipe->entities);
+
+ if (e->type == VSP1_ENTITY_RPF) {
+ rwpf = to_rwpf(subdev);
+ pipe->inputs[pipe->num_inputs++] = rwpf;
+ rwpf->video.pipe_index = pipe->num_inputs;
+ } else if (e->type == VSP1_ENTITY_WPF) {
+ rwpf = to_rwpf(subdev);
+ pipe->output = to_rwpf(subdev);
+ rwpf->video.pipe_index = 0;
+ } else if (e->type == VSP1_ENTITY_LIF) {
+ pipe->lif = e;
+ } else if (e->type == VSP1_ENTITY_BRU) {
+ pipe->bru = e;
+ }
+ }
+
+ mutex_unlock(&mdev->graph_mutex);
+
+ /* We need one output and at least one input. */
+ if (pipe->num_inputs == 0 || !pipe->output) {
+ ret = -EPIPE;
+ goto error;
+ }
+
+ /* Follow links downstream for each input and make sure the graph
+ * contains no loop and that all branches end at the output WPF.
+ */
+ for (i = 0; i < pipe->num_inputs; ++i) {
+ ret = vsp1_pipeline_validate_branch(pipe, pipe->inputs[i],
+ pipe->output);
+ if (ret < 0)
+ goto error;
+ }
+
+ return 0;
+
+error:
+ __vsp1_pipeline_cleanup(pipe);
+ return ret;
+}
+
+static int vsp1_pipeline_init(struct vsp1_pipeline *pipe,
+ struct vsp1_video *video)
+{
+ int ret;
+
+ mutex_lock(&pipe->lock);
+
+ /* If we're the first user validate and initialize the pipeline. */
+ if (pipe->use_count == 0) {
+ ret = vsp1_pipeline_validate(pipe, video);
+ if (ret < 0)
+ goto done;
+ }
+
+ pipe->use_count++;
+ ret = 0;
+
+done:
+ mutex_unlock(&pipe->lock);
+ return ret;
+}
+
+static void vsp1_pipeline_cleanup(struct vsp1_pipeline *pipe)
+{
+ mutex_lock(&pipe->lock);
+
+ /* If we're the last user clean up the pipeline. */
+ if (--pipe->use_count == 0)
+ __vsp1_pipeline_cleanup(pipe);
+
+ mutex_unlock(&pipe->lock);
+}
+
+static void vsp1_pipeline_run(struct vsp1_pipeline *pipe)
+{
+ struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
+
+ vsp1_write(vsp1, VI6_CMD(pipe->output->entity.index), VI6_CMD_STRCMD);
+ pipe->state = VSP1_PIPELINE_RUNNING;
+ pipe->buffers_ready = 0;
+}
+
+static int vsp1_pipeline_stop(struct vsp1_pipeline *pipe)
+{
+ struct vsp1_entity *entity;
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&pipe->irqlock, flags);
+ if (pipe->state == VSP1_PIPELINE_RUNNING)
+ pipe->state = VSP1_PIPELINE_STOPPING;
+ spin_unlock_irqrestore(&pipe->irqlock, flags);
+
+ ret = wait_event_timeout(pipe->wq, pipe->state == VSP1_PIPELINE_STOPPED,
+ msecs_to_jiffies(500));
+ ret = ret == 0 ? -ETIMEDOUT : 0;
+
+ list_for_each_entry(entity, &pipe->entities, list_pipe) {
+ if (entity->route && entity->route->reg)
+ vsp1_write(entity->vsp1, entity->route->reg,
+ VI6_DPR_NODE_UNUSED);
+
+ v4l2_subdev_call(&entity->subdev, video, s_stream, 0);
+ }
+
+ return ret;
+}
+
+static bool vsp1_pipeline_ready(struct vsp1_pipeline *pipe)
+{
+ unsigned int mask;
+
+ mask = ((1 << pipe->num_inputs) - 1) << 1;
+ if (!pipe->lif)
+ mask |= 1 << 0;
+
+ return pipe->buffers_ready == mask;
+}
+
+/*
+ * vsp1_video_complete_buffer - Complete the current buffer
+ * @video: the video node
+ *
+ * This function completes the current buffer by filling its sequence number,
+ * time stamp and payload size, and hands it back to the videobuf core.
+ *
+ * When operating in DU output mode (deep pipeline to the DU through the LIF),
+ * the VSP1 needs to constantly supply frames to the display. In that case, if
+ * no other buffer is queued, reuse the one that has just been processed instead
+ * of handing it back to the videobuf core.
+ *
+ * Return the next queued buffer or NULL if the queue is empty.
+ */
+static struct vsp1_video_buffer *
+vsp1_video_complete_buffer(struct vsp1_video *video)
+{
+ struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
+ struct vsp1_video_buffer *next = NULL;
+ struct vsp1_video_buffer *done;
+ unsigned long flags;
+ unsigned int i;
+
+ spin_lock_irqsave(&video->irqlock, flags);
+
+ if (list_empty(&video->irqqueue)) {
+ spin_unlock_irqrestore(&video->irqlock, flags);
+ return NULL;
+ }
+
+ done = list_first_entry(&video->irqqueue,
+ struct vsp1_video_buffer, queue);
+
+ /* In DU output mode reuse the buffer if the list is singular. */
+ if (pipe->lif && list_is_singular(&video->irqqueue)) {
+ spin_unlock_irqrestore(&video->irqlock, flags);
+ return done;
+ }
+
+ list_del(&done->queue);
+
+ if (!list_empty(&video->irqqueue))
+ next = list_first_entry(&video->irqqueue,
+ struct vsp1_video_buffer, queue);
+
+ spin_unlock_irqrestore(&video->irqlock, flags);
+
+ done->buf.v4l2_buf.sequence = video->sequence++;
+ v4l2_get_timestamp(&done->buf.v4l2_buf.timestamp);
+ for (i = 0; i < done->buf.num_planes; ++i)
+ vb2_set_plane_payload(&done->buf, i, done->length[i]);
+ vb2_buffer_done(&done->buf, VB2_BUF_STATE_DONE);
+
+ return next;
+}
+
+static void vsp1_video_frame_end(struct vsp1_pipeline *pipe,
+ struct vsp1_video *video)
+{
+ struct vsp1_video_buffer *buf;
+ unsigned long flags;
+
+ buf = vsp1_video_complete_buffer(video);
+ if (buf == NULL)
+ return;
+
+ spin_lock_irqsave(&pipe->irqlock, flags);
+
+ video->ops->queue(video, buf);
+ pipe->buffers_ready |= 1 << video->pipe_index;
+
+ spin_unlock_irqrestore(&pipe->irqlock, flags);
+}
+
+void vsp1_pipeline_frame_end(struct vsp1_pipeline *pipe)
+{
+ enum vsp1_pipeline_state state;
+ unsigned long flags;
+ unsigned int i;
+
+ if (pipe == NULL)
+ return;
+
+ /* Complete buffers on all video nodes. */
+ for (i = 0; i < pipe->num_inputs; ++i)
+ vsp1_video_frame_end(pipe, &pipe->inputs[i]->video);
+
+ if (!pipe->lif)
+ vsp1_video_frame_end(pipe, &pipe->output->video);
+
+ spin_lock_irqsave(&pipe->irqlock, flags);
+
+ state = pipe->state;
+ pipe->state = VSP1_PIPELINE_STOPPED;
+
+ /* If a stop has been requested, mark the pipeline as stopped and
+ * return.
+ */
+ if (state == VSP1_PIPELINE_STOPPING) {
+ wake_up(&pipe->wq);
+ goto done;
+ }
+
+ /* Restart the pipeline if ready. */
+ if (vsp1_pipeline_ready(pipe))
+ vsp1_pipeline_run(pipe);
+
+done:
+ spin_unlock_irqrestore(&pipe->irqlock, flags);
+}
+
+/*
+ * Propagate the alpha value through the pipeline.
+ *
+ * As the UDS has restricted scaling capabilities when the alpha component needs
+ * to be scaled, we disable alpha scaling when the UDS input has a fixed alpha
+ * value. The UDS then outputs a fixed alpha value which needs to be programmed
+ * from the input RPF alpha.
+ */
+void vsp1_pipeline_propagate_alpha(struct vsp1_pipeline *pipe,
+ struct vsp1_entity *input,
+ unsigned int alpha)
+{
+ struct vsp1_entity *entity;
+ struct media_pad *pad;
+
+ pad = media_entity_remote_pad(&input->pads[RWPF_PAD_SOURCE]);
+
+ while (pad) {
+ if (media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
+ break;
+
+ entity = to_vsp1_entity(media_entity_to_v4l2_subdev(pad->entity));
+
+ /* The BRU background color has a fixed alpha value set to 255,
+ * the output alpha value is thus always equal to 255.
+ */
+ if (entity->type == VSP1_ENTITY_BRU)
+ alpha = 255;
+
+ if (entity->type == VSP1_ENTITY_UDS) {
+ struct vsp1_uds *uds = to_uds(&entity->subdev);
+
+ vsp1_uds_set_alpha(uds, alpha);
+ break;
+ }
+
+ pad = &entity->pads[entity->source_pad];
+ pad = media_entity_remote_pad(pad);
+ }
+}
+
+/* -----------------------------------------------------------------------------
+ * videobuf2 Queue Operations
+ */
+
+static int
+vsp1_video_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+ unsigned int *nbuffers, unsigned int *nplanes,
+ unsigned int sizes[], void *alloc_ctxs[])
+{
+ struct vsp1_video *video = vb2_get_drv_priv(vq);
+ const struct v4l2_pix_format_mplane *format;
+ struct v4l2_pix_format_mplane pix_mp;
+ unsigned int i;
+
+ if (fmt) {
+ /* Make sure the format is valid and adjust the sizeimage field
+ * if needed.
+ */
+ if (!vsp1_video_format_adjust(video, &fmt->fmt.pix_mp, &pix_mp))
+ return -EINVAL;
+
+ format = &pix_mp;
+ } else {
+ format = &video->format;
+ }
+
+ *nplanes = format->num_planes;
+
+ for (i = 0; i < format->num_planes; ++i) {
+ sizes[i] = format->plane_fmt[i].sizeimage;
+ alloc_ctxs[i] = video->alloc_ctx;
+ }
+
+ return 0;
+}
+
+static int vsp1_video_buffer_prepare(struct vb2_buffer *vb)
+{
+ struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
+ struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vb);
+ const struct v4l2_pix_format_mplane *format = &video->format;
+ unsigned int i;
+
+ if (vb->num_planes < format->num_planes)
+ return -EINVAL;
+
+ for (i = 0; i < vb->num_planes; ++i) {
+ buf->addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
+ buf->length[i] = vb2_plane_size(vb, i);
+
+ if (buf->length[i] < format->plane_fmt[i].sizeimage)
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void vsp1_video_buffer_queue(struct vb2_buffer *vb)
+{
+ struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
+ struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
+ struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vb);
+ unsigned long flags;
+ bool empty;
+
+ spin_lock_irqsave(&video->irqlock, flags);
+ empty = list_empty(&video->irqqueue);
+ list_add_tail(&buf->queue, &video->irqqueue);
+ spin_unlock_irqrestore(&video->irqlock, flags);
+
+ if (!empty)
+ return;
+
+ spin_lock_irqsave(&pipe->irqlock, flags);
+
+ video->ops->queue(video, buf);
+ pipe->buffers_ready |= 1 << video->pipe_index;
+
+ if (vb2_is_streaming(&video->queue) &&
+ vsp1_pipeline_ready(pipe))
+ vsp1_pipeline_run(pipe);
+
+ spin_unlock_irqrestore(&pipe->irqlock, flags);
+}
+
+static void vsp1_entity_route_setup(struct vsp1_entity *source)
+{
+ struct vsp1_entity *sink;
+
+ if (source->route->reg == 0)
+ return;
+
+ sink = container_of(source->sink, struct vsp1_entity, subdev.entity);
+ vsp1_write(source->vsp1, source->route->reg,
+ sink->route->inputs[source->sink_pad]);
+}
+
+static int vsp1_video_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct vsp1_video *video = vb2_get_drv_priv(vq);
+ struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
+ struct vsp1_entity *entity;
+ unsigned long flags;
+ int ret;
+
+ mutex_lock(&pipe->lock);
+ if (pipe->stream_count == pipe->num_video - 1) {
+ if (pipe->uds) {
+ struct vsp1_uds *uds = to_uds(&pipe->uds->subdev);
+
+ /* If a BRU is present in the pipeline before the UDS,
+ * the alpha component doesn't need to be scaled as the
+ * BRU output alpha value is fixed to 255. Otherwise we
+ * need to scale the alpha component only when available
+ * at the input RPF.
+ */
+ if (pipe->uds_input->type == VSP1_ENTITY_BRU) {
+ uds->scale_alpha = false;
+ } else {
+ struct vsp1_rwpf *rpf =
+ to_rwpf(&pipe->uds_input->subdev);
+
+ uds->scale_alpha = rpf->video.fmtinfo->alpha;
+ }
+ }
+
+ list_for_each_entry(entity, &pipe->entities, list_pipe) {
+ vsp1_entity_route_setup(entity);
+
+ ret = v4l2_subdev_call(&entity->subdev, video,
+ s_stream, 1);
+ if (ret < 0) {
+ mutex_unlock(&pipe->lock);
+ return ret;
+ }
+ }
+ }
+
+ pipe->stream_count++;
+ mutex_unlock(&pipe->lock);
+
+ spin_lock_irqsave(&pipe->irqlock, flags);
+ if (vsp1_pipeline_ready(pipe))
+ vsp1_pipeline_run(pipe);
+ spin_unlock_irqrestore(&pipe->irqlock, flags);
+
+ return 0;
+}
+
+static void vsp1_video_stop_streaming(struct vb2_queue *vq)
+{
+ struct vsp1_video *video = vb2_get_drv_priv(vq);
+ struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
+ struct vsp1_video_buffer *buffer;
+ unsigned long flags;
+ int ret;
+
+ mutex_lock(&pipe->lock);
+ if (--pipe->stream_count == 0) {
+ /* Stop the pipeline. */
+ ret = vsp1_pipeline_stop(pipe);
+ if (ret == -ETIMEDOUT)
+ dev_err(video->vsp1->dev, "pipeline stop timeout\n");
+ }
+ mutex_unlock(&pipe->lock);
+
+ vsp1_pipeline_cleanup(pipe);
+ media_entity_pipeline_stop(&video->video.entity);
+
+ /* Remove all buffers from the IRQ queue. */
+ spin_lock_irqsave(&video->irqlock, flags);
+ list_for_each_entry(buffer, &video->irqqueue, queue)
+ vb2_buffer_done(&buffer->buf, VB2_BUF_STATE_ERROR);
+ INIT_LIST_HEAD(&video->irqqueue);
+ spin_unlock_irqrestore(&video->irqlock, flags);
+}
+
+static struct vb2_ops vsp1_video_queue_qops = {
+ .queue_setup = vsp1_video_queue_setup,
+ .buf_prepare = vsp1_video_buffer_prepare,
+ .buf_queue = vsp1_video_buffer_queue,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+ .start_streaming = vsp1_video_start_streaming,
+ .stop_streaming = vsp1_video_stop_streaming,
+};
+
+/* -----------------------------------------------------------------------------
+ * V4L2 ioctls
+ */
+
+static int
+vsp1_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
+{
+ struct v4l2_fh *vfh = file->private_data;
+ struct vsp1_video *video = to_vsp1_video(vfh->vdev);
+
+ cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
+ | V4L2_CAP_VIDEO_CAPTURE_MPLANE
+ | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
+
+ if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+ cap->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE
+ | V4L2_CAP_STREAMING;
+ else
+ cap->device_caps = V4L2_CAP_VIDEO_OUTPUT_MPLANE
+ | V4L2_CAP_STREAMING;
+
+ strlcpy(cap->driver, "vsp1", sizeof(cap->driver));
+ strlcpy(cap->card, video->video.name, sizeof(cap->card));
+ snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
+ dev_name(video->vsp1->dev));
+
+ return 0;
+}
+
+static int
+vsp1_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
+{
+ struct v4l2_fh *vfh = file->private_data;
+ struct vsp1_video *video = to_vsp1_video(vfh->vdev);
+
+ if (format->type != video->queue.type)
+ return -EINVAL;
+
+ mutex_lock(&video->lock);
+ format->fmt.pix_mp = video->format;
+ mutex_unlock(&video->lock);
+
+ return 0;
+}
+
+static int
+vsp1_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
+{
+ struct v4l2_fh *vfh = file->private_data;
+ struct vsp1_video *video = to_vsp1_video(vfh->vdev);
+
+ if (format->type != video->queue.type)
+ return -EINVAL;
+
+ return __vsp1_video_try_format(video, &format->fmt.pix_mp, NULL);
+}
+
+static int
+vsp1_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
+{
+ struct v4l2_fh *vfh = file->private_data;
+ struct vsp1_video *video = to_vsp1_video(vfh->vdev);
+ const struct vsp1_format_info *info;
+ int ret;
+
+ if (format->type != video->queue.type)
+ return -EINVAL;
+
+ ret = __vsp1_video_try_format(video, &format->fmt.pix_mp, &info);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&video->lock);
+
+ if (vb2_is_busy(&video->queue)) {
+ ret = -EBUSY;
+ goto done;
+ }
+
+ video->format = format->fmt.pix_mp;
+ video->fmtinfo = info;
+
+done:
+ mutex_unlock(&video->lock);
+ return ret;
+}
+
+static int
+vsp1_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
+{
+ struct v4l2_fh *vfh = file->private_data;
+ struct vsp1_video *video = to_vsp1_video(vfh->vdev);
+ struct vsp1_pipeline *pipe;
+ int ret;
+
+ if (video->queue.owner && video->queue.owner != file->private_data)
+ return -EBUSY;
+
+ video->sequence = 0;
+
+ /* Start streaming on the pipeline. No link touching an entity in the
+ * pipeline can be activated or deactivated once streaming is started.
+ *
+ * Use the VSP1 pipeline object embedded in the first video object that
+ * starts streaming.
+ */
+ pipe = video->video.entity.pipe
+ ? to_vsp1_pipeline(&video->video.entity) : &video->pipe;
+
+ ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
+ if (ret < 0)
+ return ret;
+
+ /* Verify that the configured format matches the output of the connected
+ * subdev.
+ */
+ ret = vsp1_video_verify_format(video);
+ if (ret < 0)
+ goto err_stop;
+
+ ret = vsp1_pipeline_init(pipe, video);
+ if (ret < 0)
+ goto err_stop;
+
+ /* Start the queue. */
+ ret = vb2_streamon(&video->queue, type);
+ if (ret < 0)
+ goto err_cleanup;
+
+ return 0;
+
+err_cleanup:
+ vsp1_pipeline_cleanup(pipe);
+err_stop:
+ media_entity_pipeline_stop(&video->video.entity);
+ return ret;
+}
+
+static const struct v4l2_ioctl_ops vsp1_video_ioctl_ops = {
+ .vidioc_querycap = vsp1_video_querycap,
+ .vidioc_g_fmt_vid_cap_mplane = vsp1_video_get_format,
+ .vidioc_s_fmt_vid_cap_mplane = vsp1_video_set_format,
+ .vidioc_try_fmt_vid_cap_mplane = vsp1_video_try_format,
+ .vidioc_g_fmt_vid_out_mplane = vsp1_video_get_format,
+ .vidioc_s_fmt_vid_out_mplane = vsp1_video_set_format,
+ .vidioc_try_fmt_vid_out_mplane = vsp1_video_try_format,
+ .vidioc_reqbufs = vb2_ioctl_reqbufs,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_qbuf = vb2_ioctl_qbuf,
+ .vidioc_dqbuf = vb2_ioctl_dqbuf,
+ .vidioc_create_bufs = vb2_ioctl_create_bufs,
+ .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+ .vidioc_streamon = vsp1_video_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
+};
+
+/* -----------------------------------------------------------------------------
+ * V4L2 File Operations
+ */
+
+static int vsp1_video_open(struct file *file)
+{
+ struct vsp1_video *video = video_drvdata(file);
+ struct v4l2_fh *vfh;
+ int ret = 0;
+
+ vfh = kzalloc(sizeof(*vfh), GFP_KERNEL);
+ if (vfh == NULL)
+ return -ENOMEM;
+
+ v4l2_fh_init(vfh, &video->video);
+ v4l2_fh_add(vfh);
+
+ file->private_data = vfh;
+
+ ret = vsp1_device_get(video->vsp1);
+ if (ret < 0) {
+ v4l2_fh_del(vfh);
+ kfree(vfh);
+ }
+
+ return ret;
+}
+
+static int vsp1_video_release(struct file *file)
+{
+ struct vsp1_video *video = video_drvdata(file);
+ struct v4l2_fh *vfh = file->private_data;
+
+ mutex_lock(&video->lock);
+ if (video->queue.owner == vfh) {
+ vb2_queue_release(&video->queue);
+ video->queue.owner = NULL;
+ }
+ mutex_unlock(&video->lock);
+
+ vsp1_device_put(video->vsp1);
+
+ v4l2_fh_release(file);
+
+ file->private_data = NULL;
+
+ return 0;
+}
+
+static struct v4l2_file_operations vsp1_video_fops = {
+ .owner = THIS_MODULE,
+ .unlocked_ioctl = video_ioctl2,
+ .open = vsp1_video_open,
+ .release = vsp1_video_release,
+ .poll = vb2_fop_poll,
+ .mmap = vb2_fop_mmap,
+};
+
+/* -----------------------------------------------------------------------------
+ * Initialization and Cleanup
+ */
+
+int vsp1_video_init(struct vsp1_video *video, struct vsp1_entity *rwpf)
+{
+ const char *direction;
+ int ret;
+
+ switch (video->type) {
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
+ direction = "output";
+ video->pad.flags = MEDIA_PAD_FL_SINK;
+ break;
+
+ case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
+ direction = "input";
+ video->pad.flags = MEDIA_PAD_FL_SOURCE;
+ video->video.vfl_dir = VFL_DIR_TX;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ video->rwpf = rwpf;
+
+ mutex_init(&video->lock);
+ spin_lock_init(&video->irqlock);
+ INIT_LIST_HEAD(&video->irqqueue);
+
+ mutex_init(&video->pipe.lock);
+ spin_lock_init(&video->pipe.irqlock);
+ INIT_LIST_HEAD(&video->pipe.entities);
+ init_waitqueue_head(&video->pipe.wq);
+ video->pipe.state = VSP1_PIPELINE_STOPPED;
+
+ /* Initialize the media entity... */
+ ret = media_entity_init(&video->video.entity, 1, &video->pad, 0);
+ if (ret < 0)
+ return ret;
+
+ /* ... and the format ... */
+ video->fmtinfo = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
+ video->format.pixelformat = video->fmtinfo->fourcc;
+ video->format.colorspace = V4L2_COLORSPACE_SRGB;
+ video->format.field = V4L2_FIELD_NONE;
+ video->format.width = VSP1_VIDEO_DEF_WIDTH;
+ video->format.height = VSP1_VIDEO_DEF_HEIGHT;
+ video->format.num_planes = 1;
+ video->format.plane_fmt[0].bytesperline =
+ video->format.width * video->fmtinfo->bpp[0] / 8;
+ video->format.plane_fmt[0].sizeimage =
+ video->format.plane_fmt[0].bytesperline * video->format.height;
+
+ /* ... and the video node... */
+ video->video.v4l2_dev = &video->vsp1->v4l2_dev;
+ video->video.fops = &vsp1_video_fops;
+ snprintf(video->video.name, sizeof(video->video.name), "%s %s",
+ rwpf->subdev.name, direction);
+ video->video.vfl_type = VFL_TYPE_GRABBER;
+ video->video.release = video_device_release_empty;
+ video->video.ioctl_ops = &vsp1_video_ioctl_ops;
+
+ video_set_drvdata(&video->video, video);
+
+ /* ... and the buffers queue... */
+ video->alloc_ctx = vb2_dma_contig_init_ctx(video->vsp1->dev);
+ if (IS_ERR(video->alloc_ctx)) {
+ ret = PTR_ERR(video->alloc_ctx);
+ goto error;
+ }
+
+ video->queue.type = video->type;
+ video->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
+ video->queue.lock = &video->lock;
+ video->queue.drv_priv = video;
+ video->queue.buf_struct_size = sizeof(struct vsp1_video_buffer);
+ video->queue.ops = &vsp1_video_queue_qops;
+ video->queue.mem_ops = &vb2_dma_contig_memops;
+ video->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+ ret = vb2_queue_init(&video->queue);
+ if (ret < 0) {
+ dev_err(video->vsp1->dev, "failed to initialize vb2 queue\n");
+ goto error;
+ }
+
+ /* ... and register the video device. */
+ video->video.queue = &video->queue;
+ ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
+ if (ret < 0) {
+ dev_err(video->vsp1->dev, "failed to register video device\n");
+ goto error;
+ }
+
+ return 0;
+
+error:
+ vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
+ vsp1_video_cleanup(video);
+ return ret;
+}
+
+void vsp1_video_cleanup(struct vsp1_video *video)
+{
+ if (video_is_registered(&video->video))
+ video_unregister_device(&video->video);
+
+ vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
+ media_entity_cleanup(&video->video.entity);
+}
Code Review / kvmfornfv.git / blobdiff