--- /dev/null
+/*
+ * Samsung TV Mixer driver
+ *
+ * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
+ *
+ * Tomasz Stanislawski, <t.stanislaws@samsung.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
+ */
+
+#define pr_fmt(fmt) "s5p-tv (mixer): " fmt
+
+#include "mixer.h"
+
+#include <media/v4l2-ioctl.h>
+#include <linux/videodev2.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/timer.h>
+#include <media/videobuf2-dma-contig.h>
+
+static int find_reg_callback(struct device *dev, void *p)
+{
+ struct v4l2_subdev **sd = p;
+
+ *sd = dev_get_drvdata(dev);
+ /* non-zero value stops iteration */
+ return 1;
+}
+
+static struct v4l2_subdev *find_and_register_subdev(
+ struct mxr_device *mdev, char *module_name)
+{
+ struct device_driver *drv;
+ struct v4l2_subdev *sd = NULL;
+ int ret;
+
+ /* TODO: add waiting until probe is finished */
+ drv = driver_find(module_name, &platform_bus_type);
+ if (!drv) {
+ mxr_warn(mdev, "module %s is missing\n", module_name);
+ return NULL;
+ }
+ /* driver refcnt is increased, it is safe to iterate over devices */
+ ret = driver_for_each_device(drv, NULL, &sd, find_reg_callback);
+ /* ret == 0 means that find_reg_callback was never executed */
+ if (sd == NULL) {
+ mxr_warn(mdev, "module %s provides no subdev!\n", module_name);
+ goto done;
+ }
+ /* v4l2_device_register_subdev detects if sd is NULL */
+ ret = v4l2_device_register_subdev(&mdev->v4l2_dev, sd);
+ if (ret) {
+ mxr_warn(mdev, "failed to register subdev %s\n", sd->name);
+ sd = NULL;
+ }
+
+done:
+ return sd;
+}
+
+int mxr_acquire_video(struct mxr_device *mdev,
+ struct mxr_output_conf *output_conf, int output_count)
+{
+ struct device *dev = mdev->dev;
+ struct v4l2_device *v4l2_dev = &mdev->v4l2_dev;
+ int i;
+ int ret = 0;
+ struct v4l2_subdev *sd;
+
+ strlcpy(v4l2_dev->name, dev_name(mdev->dev), sizeof(v4l2_dev->name));
+ /* prepare context for V4L2 device */
+ ret = v4l2_device_register(dev, v4l2_dev);
+ if (ret) {
+ mxr_err(mdev, "could not register v4l2 device.\n");
+ goto fail;
+ }
+
+ mdev->alloc_ctx = vb2_dma_contig_init_ctx(mdev->dev);
+ if (IS_ERR(mdev->alloc_ctx)) {
+ mxr_err(mdev, "could not acquire vb2 allocator\n");
+ ret = PTR_ERR(mdev->alloc_ctx);
+ goto fail_v4l2_dev;
+ }
+
+ /* registering outputs */
+ mdev->output_cnt = 0;
+ for (i = 0; i < output_count; ++i) {
+ struct mxr_output_conf *conf = &output_conf[i];
+ struct mxr_output *out;
+
+ sd = find_and_register_subdev(mdev, conf->module_name);
+ /* trying to register next output */
+ if (sd == NULL)
+ continue;
+ out = kzalloc(sizeof(*out), GFP_KERNEL);
+ if (out == NULL) {
+ mxr_err(mdev, "no memory for '%s'\n",
+ conf->output_name);
+ ret = -ENOMEM;
+ /* registered subdevs are removed in fail_v4l2_dev */
+ goto fail_output;
+ }
+ strlcpy(out->name, conf->output_name, sizeof(out->name));
+ out->sd = sd;
+ out->cookie = conf->cookie;
+ mdev->output[mdev->output_cnt++] = out;
+ mxr_info(mdev, "added output '%s' from module '%s'\n",
+ conf->output_name, conf->module_name);
+ /* checking if maximal number of outputs is reached */
+ if (mdev->output_cnt >= MXR_MAX_OUTPUTS)
+ break;
+ }
+
+ if (mdev->output_cnt == 0) {
+ mxr_err(mdev, "failed to register any output\n");
+ ret = -ENODEV;
+ /* skipping fail_output because there is nothing to free */
+ goto fail_vb2_allocator;
+ }
+
+ return 0;
+
+fail_output:
+ /* kfree is NULL-safe */
+ for (i = 0; i < mdev->output_cnt; ++i)
+ kfree(mdev->output[i]);
+ memset(mdev->output, 0, sizeof(mdev->output));
+
+fail_vb2_allocator:
+ /* freeing allocator context */
+ vb2_dma_contig_cleanup_ctx(mdev->alloc_ctx);
+
+fail_v4l2_dev:
+ /* NOTE: automatically unregister all subdevs */
+ v4l2_device_unregister(v4l2_dev);
+
+fail:
+ return ret;
+}
+
+void mxr_release_video(struct mxr_device *mdev)
+{
+ int i;
+
+ /* kfree is NULL-safe */
+ for (i = 0; i < mdev->output_cnt; ++i)
+ kfree(mdev->output[i]);
+
+ vb2_dma_contig_cleanup_ctx(mdev->alloc_ctx);
+ v4l2_device_unregister(&mdev->v4l2_dev);
+}
+
+static int mxr_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+
+ mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
+
+ strlcpy(cap->driver, MXR_DRIVER_NAME, sizeof(cap->driver));
+ strlcpy(cap->card, layer->vfd.name, sizeof(cap->card));
+ sprintf(cap->bus_info, "%d", layer->idx);
+ cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
+ cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+
+ return 0;
+}
+
+static void mxr_geometry_dump(struct mxr_device *mdev, struct mxr_geometry *geo)
+{
+ mxr_dbg(mdev, "src.full_size = (%u, %u)\n",
+ geo->src.full_width, geo->src.full_height);
+ mxr_dbg(mdev, "src.size = (%u, %u)\n",
+ geo->src.width, geo->src.height);
+ mxr_dbg(mdev, "src.offset = (%u, %u)\n",
+ geo->src.x_offset, geo->src.y_offset);
+ mxr_dbg(mdev, "dst.full_size = (%u, %u)\n",
+ geo->dst.full_width, geo->dst.full_height);
+ mxr_dbg(mdev, "dst.size = (%u, %u)\n",
+ geo->dst.width, geo->dst.height);
+ mxr_dbg(mdev, "dst.offset = (%u, %u)\n",
+ geo->dst.x_offset, geo->dst.y_offset);
+ mxr_dbg(mdev, "ratio = (%u, %u)\n",
+ geo->x_ratio, geo->y_ratio);
+}
+
+static void mxr_layer_default_geo(struct mxr_layer *layer)
+{
+ struct mxr_device *mdev = layer->mdev;
+ struct v4l2_mbus_framefmt mbus_fmt;
+
+ memset(&layer->geo, 0, sizeof(layer->geo));
+
+ mxr_get_mbus_fmt(mdev, &mbus_fmt);
+
+ layer->geo.dst.full_width = mbus_fmt.width;
+ layer->geo.dst.full_height = mbus_fmt.height;
+ layer->geo.dst.width = layer->geo.dst.full_width;
+ layer->geo.dst.height = layer->geo.dst.full_height;
+ layer->geo.dst.field = mbus_fmt.field;
+
+ layer->geo.src.full_width = mbus_fmt.width;
+ layer->geo.src.full_height = mbus_fmt.height;
+ layer->geo.src.width = layer->geo.src.full_width;
+ layer->geo.src.height = layer->geo.src.full_height;
+
+ mxr_geometry_dump(mdev, &layer->geo);
+ layer->ops.fix_geometry(layer, MXR_GEOMETRY_SINK, 0);
+ mxr_geometry_dump(mdev, &layer->geo);
+}
+
+static void mxr_layer_update_output(struct mxr_layer *layer)
+{
+ struct mxr_device *mdev = layer->mdev;
+ struct v4l2_mbus_framefmt mbus_fmt;
+
+ mxr_get_mbus_fmt(mdev, &mbus_fmt);
+ /* checking if update is needed */
+ if (layer->geo.dst.full_width == mbus_fmt.width &&
+ layer->geo.dst.full_height == mbus_fmt.width)
+ return;
+
+ layer->geo.dst.full_width = mbus_fmt.width;
+ layer->geo.dst.full_height = mbus_fmt.height;
+ layer->geo.dst.field = mbus_fmt.field;
+ layer->ops.fix_geometry(layer, MXR_GEOMETRY_SINK, 0);
+
+ mxr_geometry_dump(mdev, &layer->geo);
+}
+
+static const struct mxr_format *find_format_by_fourcc(
+ struct mxr_layer *layer, unsigned long fourcc);
+static const struct mxr_format *find_format_by_index(
+ struct mxr_layer *layer, unsigned long index);
+
+static int mxr_enum_fmt(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+ struct mxr_device *mdev = layer->mdev;
+ const struct mxr_format *fmt;
+
+ mxr_dbg(mdev, "%s\n", __func__);
+ fmt = find_format_by_index(layer, f->index);
+ if (fmt == NULL)
+ return -EINVAL;
+
+ strlcpy(f->description, fmt->name, sizeof(f->description));
+ f->pixelformat = fmt->fourcc;
+
+ return 0;
+}
+
+static unsigned int divup(unsigned int divident, unsigned int divisor)
+{
+ return (divident + divisor - 1) / divisor;
+}
+
+unsigned long mxr_get_plane_size(const struct mxr_block *blk,
+ unsigned int width, unsigned int height)
+{
+ unsigned int bl_width = divup(width, blk->width);
+ unsigned int bl_height = divup(height, blk->height);
+
+ return bl_width * bl_height * blk->size;
+}
+
+static void mxr_mplane_fill(struct v4l2_plane_pix_format *planes,
+ const struct mxr_format *fmt, u32 width, u32 height)
+{
+ int i;
+
+ /* checking if nothing to fill */
+ if (!planes)
+ return;
+
+ memset(planes, 0, sizeof(*planes) * fmt->num_subframes);
+ for (i = 0; i < fmt->num_planes; ++i) {
+ struct v4l2_plane_pix_format *plane = planes
+ + fmt->plane2subframe[i];
+ const struct mxr_block *blk = &fmt->plane[i];
+ u32 bl_width = divup(width, blk->width);
+ u32 bl_height = divup(height, blk->height);
+ u32 sizeimage = bl_width * bl_height * blk->size;
+ u32 bytesperline = bl_width * blk->size / blk->height;
+
+ plane->sizeimage += sizeimage;
+ plane->bytesperline = max(plane->bytesperline, bytesperline);
+ }
+}
+
+static int mxr_g_fmt(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+ struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
+
+ mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
+
+ pix->width = layer->geo.src.full_width;
+ pix->height = layer->geo.src.full_height;
+ pix->field = V4L2_FIELD_NONE;
+ pix->pixelformat = layer->fmt->fourcc;
+ pix->colorspace = layer->fmt->colorspace;
+ mxr_mplane_fill(pix->plane_fmt, layer->fmt, pix->width, pix->height);
+
+ return 0;
+}
+
+static int mxr_s_fmt(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+ const struct mxr_format *fmt;
+ struct v4l2_pix_format_mplane *pix;
+ struct mxr_device *mdev = layer->mdev;
+ struct mxr_geometry *geo = &layer->geo;
+
+ mxr_dbg(mdev, "%s:%d\n", __func__, __LINE__);
+
+ pix = &f->fmt.pix_mp;
+ fmt = find_format_by_fourcc(layer, pix->pixelformat);
+ if (fmt == NULL) {
+ mxr_warn(mdev, "not recognized fourcc: %08x\n",
+ pix->pixelformat);
+ return -EINVAL;
+ }
+ layer->fmt = fmt;
+ /* set source size to highest accepted value */
+ geo->src.full_width = max(geo->dst.full_width, pix->width);
+ geo->src.full_height = max(geo->dst.full_height, pix->height);
+ layer->ops.fix_geometry(layer, MXR_GEOMETRY_SOURCE, 0);
+ mxr_geometry_dump(mdev, &layer->geo);
+ /* set cropping to total visible screen */
+ geo->src.width = pix->width;
+ geo->src.height = pix->height;
+ geo->src.x_offset = 0;
+ geo->src.y_offset = 0;
+ /* assure consistency of geometry */
+ layer->ops.fix_geometry(layer, MXR_GEOMETRY_CROP, MXR_NO_OFFSET);
+ mxr_geometry_dump(mdev, &layer->geo);
+ /* set full size to lowest possible value */
+ geo->src.full_width = 0;
+ geo->src.full_height = 0;
+ layer->ops.fix_geometry(layer, MXR_GEOMETRY_SOURCE, 0);
+ mxr_geometry_dump(mdev, &layer->geo);
+
+ /* returning results */
+ mxr_g_fmt(file, priv, f);
+
+ return 0;
+}
+
+static int mxr_g_selection(struct file *file, void *fh,
+ struct v4l2_selection *s)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+ struct mxr_geometry *geo = &layer->geo;
+
+ mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
+
+ if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT &&
+ s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
+ return -EINVAL;
+
+ switch (s->target) {
+ case V4L2_SEL_TGT_CROP:
+ s->r.left = geo->src.x_offset;
+ s->r.top = geo->src.y_offset;
+ s->r.width = geo->src.width;
+ s->r.height = geo->src.height;
+ break;
+ case V4L2_SEL_TGT_CROP_DEFAULT:
+ case V4L2_SEL_TGT_CROP_BOUNDS:
+ s->r.left = 0;
+ s->r.top = 0;
+ s->r.width = geo->src.full_width;
+ s->r.height = geo->src.full_height;
+ break;
+ case V4L2_SEL_TGT_COMPOSE:
+ case V4L2_SEL_TGT_COMPOSE_PADDED:
+ s->r.left = geo->dst.x_offset;
+ s->r.top = geo->dst.y_offset;
+ s->r.width = geo->dst.width;
+ s->r.height = geo->dst.height;
+ break;
+ case V4L2_SEL_TGT_COMPOSE_DEFAULT:
+ case V4L2_SEL_TGT_COMPOSE_BOUNDS:
+ s->r.left = 0;
+ s->r.top = 0;
+ s->r.width = geo->dst.full_width;
+ s->r.height = geo->dst.full_height;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* returns 1 if rectangle 'a' is inside 'b' */
+static int mxr_is_rect_inside(struct v4l2_rect *a, struct v4l2_rect *b)
+{
+ if (a->left < b->left)
+ return 0;
+ if (a->top < b->top)
+ return 0;
+ if (a->left + a->width > b->left + b->width)
+ return 0;
+ if (a->top + a->height > b->top + b->height)
+ return 0;
+ return 1;
+}
+
+static int mxr_s_selection(struct file *file, void *fh,
+ struct v4l2_selection *s)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+ struct mxr_geometry *geo = &layer->geo;
+ struct mxr_crop *target = NULL;
+ enum mxr_geometry_stage stage;
+ struct mxr_geometry tmp;
+ struct v4l2_rect res;
+
+ memset(&res, 0, sizeof(res));
+
+ mxr_dbg(layer->mdev, "%s: rect: %dx%d@%d,%d\n", __func__,
+ s->r.width, s->r.height, s->r.left, s->r.top);
+
+ if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT &&
+ s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
+ return -EINVAL;
+
+ switch (s->target) {
+ /* ignore read-only targets */
+ case V4L2_SEL_TGT_CROP_DEFAULT:
+ case V4L2_SEL_TGT_CROP_BOUNDS:
+ res.width = geo->src.full_width;
+ res.height = geo->src.full_height;
+ break;
+
+ /* ignore read-only targets */
+ case V4L2_SEL_TGT_COMPOSE_DEFAULT:
+ case V4L2_SEL_TGT_COMPOSE_BOUNDS:
+ res.width = geo->dst.full_width;
+ res.height = geo->dst.full_height;
+ break;
+
+ case V4L2_SEL_TGT_CROP:
+ target = &geo->src;
+ stage = MXR_GEOMETRY_CROP;
+ break;
+ case V4L2_SEL_TGT_COMPOSE:
+ case V4L2_SEL_TGT_COMPOSE_PADDED:
+ target = &geo->dst;
+ stage = MXR_GEOMETRY_COMPOSE;
+ break;
+ default:
+ return -EINVAL;
+ }
+ /* apply change and update geometry if needed */
+ if (target) {
+ /* backup current geometry if setup fails */
+ memcpy(&tmp, geo, sizeof(tmp));
+
+ /* apply requested selection */
+ target->x_offset = s->r.left;
+ target->y_offset = s->r.top;
+ target->width = s->r.width;
+ target->height = s->r.height;
+
+ layer->ops.fix_geometry(layer, stage, s->flags);
+
+ /* retrieve update selection rectangle */
+ res.left = target->x_offset;
+ res.top = target->y_offset;
+ res.width = target->width;
+ res.height = target->height;
+
+ mxr_geometry_dump(layer->mdev, &layer->geo);
+ }
+
+ /* checking if the rectangle satisfies constraints */
+ if ((s->flags & V4L2_SEL_FLAG_LE) && !mxr_is_rect_inside(&res, &s->r))
+ goto fail;
+ if ((s->flags & V4L2_SEL_FLAG_GE) && !mxr_is_rect_inside(&s->r, &res))
+ goto fail;
+
+ /* return result rectangle */
+ s->r = res;
+
+ return 0;
+fail:
+ /* restore old geometry, which is not touched if target is NULL */
+ if (target)
+ memcpy(geo, &tmp, sizeof(tmp));
+ return -ERANGE;
+}
+
+static int mxr_enum_dv_timings(struct file *file, void *fh,
+ struct v4l2_enum_dv_timings *timings)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+ struct mxr_device *mdev = layer->mdev;
+ int ret;
+
+ timings->pad = 0;
+
+ /* lock protects from changing sd_out */
+ mutex_lock(&mdev->mutex);
+ ret = v4l2_subdev_call(to_outsd(mdev), pad, enum_dv_timings, timings);
+ mutex_unlock(&mdev->mutex);
+
+ return ret ? -EINVAL : 0;
+}
+
+static int mxr_s_dv_timings(struct file *file, void *fh,
+ struct v4l2_dv_timings *timings)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+ struct mxr_device *mdev = layer->mdev;
+ int ret;
+
+ /* lock protects from changing sd_out */
+ mutex_lock(&mdev->mutex);
+
+ /* timings change cannot be done while there is an entity
+ * dependent on output configuration
+ */
+ if (mdev->n_output > 0) {
+ mutex_unlock(&mdev->mutex);
+ return -EBUSY;
+ }
+
+ ret = v4l2_subdev_call(to_outsd(mdev), video, s_dv_timings, timings);
+
+ mutex_unlock(&mdev->mutex);
+
+ mxr_layer_update_output(layer);
+
+ /* any failure should return EINVAL according to V4L2 doc */
+ return ret ? -EINVAL : 0;
+}
+
+static int mxr_g_dv_timings(struct file *file, void *fh,
+ struct v4l2_dv_timings *timings)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+ struct mxr_device *mdev = layer->mdev;
+ int ret;
+
+ /* lock protects from changing sd_out */
+ mutex_lock(&mdev->mutex);
+ ret = v4l2_subdev_call(to_outsd(mdev), video, g_dv_timings, timings);
+ mutex_unlock(&mdev->mutex);
+
+ return ret ? -EINVAL : 0;
+}
+
+static int mxr_dv_timings_cap(struct file *file, void *fh,
+ struct v4l2_dv_timings_cap *cap)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+ struct mxr_device *mdev = layer->mdev;
+ int ret;
+
+ cap->pad = 0;
+
+ /* lock protects from changing sd_out */
+ mutex_lock(&mdev->mutex);
+ ret = v4l2_subdev_call(to_outsd(mdev), pad, dv_timings_cap, cap);
+ mutex_unlock(&mdev->mutex);
+
+ return ret ? -EINVAL : 0;
+}
+
+static int mxr_s_std(struct file *file, void *fh, v4l2_std_id norm)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+ struct mxr_device *mdev = layer->mdev;
+ int ret;
+
+ /* lock protects from changing sd_out */
+ mutex_lock(&mdev->mutex);
+
+ /* standard change cannot be done while there is an entity
+ * dependent on output configuration
+ */
+ if (mdev->n_output > 0) {
+ mutex_unlock(&mdev->mutex);
+ return -EBUSY;
+ }
+
+ ret = v4l2_subdev_call(to_outsd(mdev), video, s_std_output, norm);
+
+ mutex_unlock(&mdev->mutex);
+
+ mxr_layer_update_output(layer);
+
+ return ret ? -EINVAL : 0;
+}
+
+static int mxr_g_std(struct file *file, void *fh, v4l2_std_id *norm)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+ struct mxr_device *mdev = layer->mdev;
+ int ret;
+
+ /* lock protects from changing sd_out */
+ mutex_lock(&mdev->mutex);
+ ret = v4l2_subdev_call(to_outsd(mdev), video, g_std_output, norm);
+ mutex_unlock(&mdev->mutex);
+
+ return ret ? -EINVAL : 0;
+}
+
+static int mxr_enum_output(struct file *file, void *fh, struct v4l2_output *a)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+ struct mxr_device *mdev = layer->mdev;
+ struct mxr_output *out;
+ struct v4l2_subdev *sd;
+
+ if (a->index >= mdev->output_cnt)
+ return -EINVAL;
+ out = mdev->output[a->index];
+ BUG_ON(out == NULL);
+ sd = out->sd;
+ strlcpy(a->name, out->name, sizeof(a->name));
+
+ /* try to obtain supported tv norms */
+ v4l2_subdev_call(sd, video, g_tvnorms_output, &a->std);
+ a->capabilities = 0;
+ if (sd->ops->video && sd->ops->video->s_dv_timings)
+ a->capabilities |= V4L2_OUT_CAP_DV_TIMINGS;
+ if (sd->ops->video && sd->ops->video->s_std_output)
+ a->capabilities |= V4L2_OUT_CAP_STD;
+ a->type = V4L2_OUTPUT_TYPE_ANALOG;
+
+ return 0;
+}
+
+static int mxr_s_output(struct file *file, void *fh, unsigned int i)
+{
+ struct video_device *vfd = video_devdata(file);
+ struct mxr_layer *layer = video_drvdata(file);
+ struct mxr_device *mdev = layer->mdev;
+
+ if (i >= mdev->output_cnt || mdev->output[i] == NULL)
+ return -EINVAL;
+
+ mutex_lock(&mdev->mutex);
+ if (mdev->n_output > 0) {
+ mutex_unlock(&mdev->mutex);
+ return -EBUSY;
+ }
+ mdev->current_output = i;
+ vfd->tvnorms = 0;
+ v4l2_subdev_call(to_outsd(mdev), video, g_tvnorms_output,
+ &vfd->tvnorms);
+ mutex_unlock(&mdev->mutex);
+
+ /* update layers geometry */
+ mxr_layer_update_output(layer);
+
+ mxr_dbg(mdev, "tvnorms = %08llx\n", vfd->tvnorms);
+
+ return 0;
+}
+
+static int mxr_g_output(struct file *file, void *fh, unsigned int *p)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+ struct mxr_device *mdev = layer->mdev;
+
+ mutex_lock(&mdev->mutex);
+ *p = mdev->current_output;
+ mutex_unlock(&mdev->mutex);
+
+ return 0;
+}
+
+static int mxr_reqbufs(struct file *file, void *priv,
+ struct v4l2_requestbuffers *p)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+
+ mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
+ return vb2_reqbufs(&layer->vb_queue, p);
+}
+
+static int mxr_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+
+ mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
+ return vb2_querybuf(&layer->vb_queue, p);
+}
+
+static int mxr_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+
+ mxr_dbg(layer->mdev, "%s:%d(%d)\n", __func__, __LINE__, p->index);
+ return vb2_qbuf(&layer->vb_queue, p);
+}
+
+static int mxr_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+
+ mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
+ return vb2_dqbuf(&layer->vb_queue, p, file->f_flags & O_NONBLOCK);
+}
+
+static int mxr_expbuf(struct file *file, void *priv,
+ struct v4l2_exportbuffer *eb)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+
+ mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
+ return vb2_expbuf(&layer->vb_queue, eb);
+}
+
+static int mxr_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+
+ mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
+ return vb2_streamon(&layer->vb_queue, i);
+}
+
+static int mxr_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+
+ mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
+ return vb2_streamoff(&layer->vb_queue, i);
+}
+
+static const struct v4l2_ioctl_ops mxr_ioctl_ops = {
+ .vidioc_querycap = mxr_querycap,
+ /* format handling */
+ .vidioc_enum_fmt_vid_out_mplane = mxr_enum_fmt,
+ .vidioc_s_fmt_vid_out_mplane = mxr_s_fmt,
+ .vidioc_g_fmt_vid_out_mplane = mxr_g_fmt,
+ /* buffer control */
+ .vidioc_reqbufs = mxr_reqbufs,
+ .vidioc_querybuf = mxr_querybuf,
+ .vidioc_qbuf = mxr_qbuf,
+ .vidioc_dqbuf = mxr_dqbuf,
+ .vidioc_expbuf = mxr_expbuf,
+ /* Streaming control */
+ .vidioc_streamon = mxr_streamon,
+ .vidioc_streamoff = mxr_streamoff,
+ /* DV Timings functions */
+ .vidioc_enum_dv_timings = mxr_enum_dv_timings,
+ .vidioc_s_dv_timings = mxr_s_dv_timings,
+ .vidioc_g_dv_timings = mxr_g_dv_timings,
+ .vidioc_dv_timings_cap = mxr_dv_timings_cap,
+ /* analog TV standard functions */
+ .vidioc_s_std = mxr_s_std,
+ .vidioc_g_std = mxr_g_std,
+ /* Output handling */
+ .vidioc_enum_output = mxr_enum_output,
+ .vidioc_s_output = mxr_s_output,
+ .vidioc_g_output = mxr_g_output,
+ /* selection ioctls */
+ .vidioc_g_selection = mxr_g_selection,
+ .vidioc_s_selection = mxr_s_selection,
+};
+
+static int mxr_video_open(struct file *file)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+ struct mxr_device *mdev = layer->mdev;
+ int ret = 0;
+
+ mxr_dbg(mdev, "%s:%d\n", __func__, __LINE__);
+ if (mutex_lock_interruptible(&layer->mutex))
+ return -ERESTARTSYS;
+ /* assure device probe is finished */
+ wait_for_device_probe();
+ /* creating context for file descriptor */
+ ret = v4l2_fh_open(file);
+ if (ret) {
+ mxr_err(mdev, "v4l2_fh_open failed\n");
+ goto unlock;
+ }
+
+ /* leaving if layer is already initialized */
+ if (!v4l2_fh_is_singular_file(file))
+ goto unlock;
+
+ /* FIXME: should power be enabled on open? */
+ ret = mxr_power_get(mdev);
+ if (ret) {
+ mxr_err(mdev, "power on failed\n");
+ goto fail_fh_open;
+ }
+
+ ret = vb2_queue_init(&layer->vb_queue);
+ if (ret != 0) {
+ mxr_err(mdev, "failed to initialize vb2 queue\n");
+ goto fail_power;
+ }
+ /* set default format, first on the list */
+ layer->fmt = layer->fmt_array[0];
+ /* setup default geometry */
+ mxr_layer_default_geo(layer);
+ mutex_unlock(&layer->mutex);
+
+ return 0;
+
+fail_power:
+ mxr_power_put(mdev);
+
+fail_fh_open:
+ v4l2_fh_release(file);
+
+unlock:
+ mutex_unlock(&layer->mutex);
+
+ return ret;
+}
+
+static unsigned int
+mxr_video_poll(struct file *file, struct poll_table_struct *wait)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+ unsigned int res;
+
+ mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
+
+ mutex_lock(&layer->mutex);
+ res = vb2_poll(&layer->vb_queue, file, wait);
+ mutex_unlock(&layer->mutex);
+ return res;
+}
+
+static int mxr_video_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+ int ret;
+
+ mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
+
+ if (mutex_lock_interruptible(&layer->mutex))
+ return -ERESTARTSYS;
+ ret = vb2_mmap(&layer->vb_queue, vma);
+ mutex_unlock(&layer->mutex);
+ return ret;
+}
+
+static int mxr_video_release(struct file *file)
+{
+ struct mxr_layer *layer = video_drvdata(file);
+
+ mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
+ mutex_lock(&layer->mutex);
+ if (v4l2_fh_is_singular_file(file)) {
+ vb2_queue_release(&layer->vb_queue);
+ mxr_power_put(layer->mdev);
+ }
+ v4l2_fh_release(file);
+ mutex_unlock(&layer->mutex);
+ return 0;
+}
+
+static const struct v4l2_file_operations mxr_fops = {
+ .owner = THIS_MODULE,
+ .open = mxr_video_open,
+ .poll = mxr_video_poll,
+ .mmap = mxr_video_mmap,
+ .release = mxr_video_release,
+ .unlocked_ioctl = video_ioctl2,
+};
+
+static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *pfmt,
+ unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[],
+ void *alloc_ctxs[])
+{
+ struct mxr_layer *layer = vb2_get_drv_priv(vq);
+ const struct mxr_format *fmt = layer->fmt;
+ int i;
+ struct mxr_device *mdev = layer->mdev;
+ struct v4l2_plane_pix_format planes[3];
+
+ mxr_dbg(mdev, "%s\n", __func__);
+ /* checking if format was configured */
+ if (fmt == NULL)
+ return -EINVAL;
+ mxr_dbg(mdev, "fmt = %s\n", fmt->name);
+ mxr_mplane_fill(planes, fmt, layer->geo.src.full_width,
+ layer->geo.src.full_height);
+
+ *nplanes = fmt->num_subframes;
+ for (i = 0; i < fmt->num_subframes; ++i) {
+ alloc_ctxs[i] = layer->mdev->alloc_ctx;
+ sizes[i] = planes[i].sizeimage;
+ mxr_dbg(mdev, "size[%d] = %08x\n", i, sizes[i]);
+ }
+
+ if (*nbuffers == 0)
+ *nbuffers = 1;
+
+ return 0;
+}
+
+static void buf_queue(struct vb2_buffer *vb)
+{
+ struct mxr_buffer *buffer = container_of(vb, struct mxr_buffer, vb);
+ struct mxr_layer *layer = vb2_get_drv_priv(vb->vb2_queue);
+ struct mxr_device *mdev = layer->mdev;
+ unsigned long flags;
+
+ spin_lock_irqsave(&layer->enq_slock, flags);
+ list_add_tail(&buffer->list, &layer->enq_list);
+ spin_unlock_irqrestore(&layer->enq_slock, flags);
+
+ mxr_dbg(mdev, "queuing buffer\n");
+}
+
+static int start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct mxr_layer *layer = vb2_get_drv_priv(vq);
+ struct mxr_device *mdev = layer->mdev;
+ unsigned long flags;
+
+ mxr_dbg(mdev, "%s\n", __func__);
+
+ /* block any changes in output configuration */
+ mxr_output_get(mdev);
+
+ mxr_layer_update_output(layer);
+ layer->ops.format_set(layer);
+ /* enabling layer in hardware */
+ spin_lock_irqsave(&layer->enq_slock, flags);
+ layer->state = MXR_LAYER_STREAMING;
+ spin_unlock_irqrestore(&layer->enq_slock, flags);
+
+ layer->ops.stream_set(layer, MXR_ENABLE);
+ mxr_streamer_get(mdev);
+
+ return 0;
+}
+
+static void mxr_watchdog(unsigned long arg)
+{
+ struct mxr_layer *layer = (struct mxr_layer *) arg;
+ struct mxr_device *mdev = layer->mdev;
+ unsigned long flags;
+
+ mxr_err(mdev, "watchdog fired for layer %s\n", layer->vfd.name);
+
+ spin_lock_irqsave(&layer->enq_slock, flags);
+
+ if (layer->update_buf == layer->shadow_buf)
+ layer->update_buf = NULL;
+ if (layer->update_buf) {
+ vb2_buffer_done(&layer->update_buf->vb, VB2_BUF_STATE_ERROR);
+ layer->update_buf = NULL;
+ }
+ if (layer->shadow_buf) {
+ vb2_buffer_done(&layer->shadow_buf->vb, VB2_BUF_STATE_ERROR);
+ layer->shadow_buf = NULL;
+ }
+ spin_unlock_irqrestore(&layer->enq_slock, flags);
+}
+
+static void stop_streaming(struct vb2_queue *vq)
+{
+ struct mxr_layer *layer = vb2_get_drv_priv(vq);
+ struct mxr_device *mdev = layer->mdev;
+ unsigned long flags;
+ struct timer_list watchdog;
+ struct mxr_buffer *buf, *buf_tmp;
+
+ mxr_dbg(mdev, "%s\n", __func__);
+
+ spin_lock_irqsave(&layer->enq_slock, flags);
+
+ /* reset list */
+ layer->state = MXR_LAYER_STREAMING_FINISH;
+
+ /* set all buffer to be done */
+ list_for_each_entry_safe(buf, buf_tmp, &layer->enq_list, list) {
+ list_del(&buf->list);
+ vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
+ }
+
+ spin_unlock_irqrestore(&layer->enq_slock, flags);
+
+ /* give 1 seconds to complete to complete last buffers */
+ setup_timer_on_stack(&watchdog, mxr_watchdog,
+ (unsigned long)layer);
+ mod_timer(&watchdog, jiffies + msecs_to_jiffies(1000));
+
+ /* wait until all buffers are goes to done state */
+ vb2_wait_for_all_buffers(vq);
+
+ /* stop timer if all synchronization is done */
+ del_timer_sync(&watchdog);
+ destroy_timer_on_stack(&watchdog);
+
+ /* stopping hardware */
+ spin_lock_irqsave(&layer->enq_slock, flags);
+ layer->state = MXR_LAYER_IDLE;
+ spin_unlock_irqrestore(&layer->enq_slock, flags);
+
+ /* disabling layer in hardware */
+ layer->ops.stream_set(layer, MXR_DISABLE);
+ /* remove one streamer */
+ mxr_streamer_put(mdev);
+ /* allow changes in output configuration */
+ mxr_output_put(mdev);
+}
+
+static struct vb2_ops mxr_video_qops = {
+ .queue_setup = queue_setup,
+ .buf_queue = buf_queue,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+ .start_streaming = start_streaming,
+ .stop_streaming = stop_streaming,
+};
+
+/* FIXME: try to put this functions to mxr_base_layer_create */
+int mxr_base_layer_register(struct mxr_layer *layer)
+{
+ struct mxr_device *mdev = layer->mdev;
+ int ret;
+
+ ret = video_register_device(&layer->vfd, VFL_TYPE_GRABBER, -1);
+ if (ret)
+ mxr_err(mdev, "failed to register video device\n");
+ else
+ mxr_info(mdev, "registered layer %s as /dev/video%d\n",
+ layer->vfd.name, layer->vfd.num);
+ return ret;
+}
+
+void mxr_base_layer_unregister(struct mxr_layer *layer)
+{
+ video_unregister_device(&layer->vfd);
+}
+
+void mxr_layer_release(struct mxr_layer *layer)
+{
+ if (layer->ops.release)
+ layer->ops.release(layer);
+}
+
+void mxr_base_layer_release(struct mxr_layer *layer)
+{
+ kfree(layer);
+}
+
+static void mxr_vfd_release(struct video_device *vdev)
+{
+ pr_info("video device release\n");
+}
+
+struct mxr_layer *mxr_base_layer_create(struct mxr_device *mdev,
+ int idx, char *name, struct mxr_layer_ops *ops)
+{
+ struct mxr_layer *layer;
+
+ layer = kzalloc(sizeof(*layer), GFP_KERNEL);
+ if (layer == NULL) {
+ mxr_err(mdev, "not enough memory for layer.\n");
+ goto fail;
+ }
+
+ layer->mdev = mdev;
+ layer->idx = idx;
+ layer->ops = *ops;
+
+ spin_lock_init(&layer->enq_slock);
+ INIT_LIST_HEAD(&layer->enq_list);
+ mutex_init(&layer->mutex);
+
+ layer->vfd = (struct video_device) {
+ .minor = -1,
+ .release = mxr_vfd_release,
+ .fops = &mxr_fops,
+ .vfl_dir = VFL_DIR_TX,
+ .ioctl_ops = &mxr_ioctl_ops,
+ };
+ strlcpy(layer->vfd.name, name, sizeof(layer->vfd.name));
+
+ video_set_drvdata(&layer->vfd, layer);
+ layer->vfd.lock = &layer->mutex;
+ layer->vfd.v4l2_dev = &mdev->v4l2_dev;
+
+ layer->vb_queue = (struct vb2_queue) {
+ .type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
+ .io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF,
+ .drv_priv = layer,
+ .buf_struct_size = sizeof(struct mxr_buffer),
+ .ops = &mxr_video_qops,
+ .min_buffers_needed = 1,
+ .mem_ops = &vb2_dma_contig_memops,
+ .lock = &layer->mutex,
+ };
+
+ return layer;
+
+fail:
+ return NULL;
+}
+
+static const struct mxr_format *find_format_by_fourcc(
+ struct mxr_layer *layer, unsigned long fourcc)
+{
+ int i;
+
+ for (i = 0; i < layer->fmt_array_size; ++i)
+ if (layer->fmt_array[i]->fourcc == fourcc)
+ return layer->fmt_array[i];
+ return NULL;
+}
+
+static const struct mxr_format *find_format_by_index(
+ struct mxr_layer *layer, unsigned long index)
+{
+ if (index >= layer->fmt_array_size)
+ return NULL;
+ return layer->fmt_array[index];
+}
+
Code Review / kvmfornfv.git / blobdiff