isp_video_check_external_subdevs() will retrieve external subdev's
bits-per-pixel and pixel rate for the use of other ISP subdevs at streamon
time. isp_video_check_external_subdevs() is called after pipeline
validation.
Signed-off-by: Sakari Ailus <sakari.ai...@iki.fi>
---
drivers/media/video/omap3isp/ispvideo.c | 79 +++++++++++++++++++++++++++++++
1 files changed, 79 insertions(+), 0 deletions(-)
diff --git a/drivers/media/video/omap3isp/ispvideo.c
b/drivers/media/video/omap3isp/ispvideo.c
index 7411076..f3b82cae4 100644
--- a/drivers/media/video/omap3isp/ispvideo.c
+++ b/drivers/media/video/omap3isp/ispvideo.c
@@ -951,6 +951,81 @@ isp_video_dqbuf(struct file *file, void *fh, struct
v4l2_buffer *b)
file->f_flags & O_NONBLOCK);
}
+static int isp_video_check_external_subdevs(struct isp_pipeline *pipe)
+{
+ struct isp_device *isp =
+ container_of(pipe, struct isp_video, pipe)->isp;
+ struct media_entity *ents[] = {
+ &isp->isp_csi2a.subdev.entity,
+ &isp->isp_csi2c.subdev.entity,
+ &isp->isp_ccp2.subdev.entity,
+ &isp->isp_ccdc.subdev.entity
+ };
+ struct media_pad *source_pad;
+ struct media_entity *source = NULL;
+ struct media_entity *sink;
+ struct v4l2_subdev_format fmt;
+ struct v4l2_ext_controls ctrls;
+ struct v4l2_ext_control ctrl;
+ unsigned int i;
+ int ret = 0;
+
+ for (i = 0; i < ARRAY_SIZE(ents); i++) {
+ /* Is the entity part of the pipeline? */
+ if (!(pipe->entities & (1 << ents[i]->id)))
+ continue;
+
+ /* ISP entities have always sink pad == 0. Find source. */
+ source_pad = media_entity_remote_source(&ents[i]->pads[0]);
+ if (source_pad == NULL)
+ continue;
+
+ source = source_pad->entity;
+ sink = ents[i];
+ break;
+ }
+
+ if (!source) {
+ dev_warn(isp->dev, "can't find source, failing now\n");
+ return ret;
+ }
+
+ if (media_entity_type(source) != MEDIA_ENT_T_V4L2_SUBDEV)
+ return 0;
+
+ pipe->external = media_entity_to_v4l2_subdev(source);
+
+ fmt.pad = source_pad->index;
+ fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+ ret = v4l2_subdev_call(media_entity_to_v4l2_subdev(sink),
+ pad, get_fmt, NULL, &fmt);
+ if (unlikely(ret < 0)) {
+ dev_warn(isp->dev, "get_fmt returned null!\n");
+ return ret;
+ }
+
+ pipe->external_bpp = omap3isp_video_format_info(fmt.format.code)->bpp;
+
+ memset(&ctrls, 0, sizeof(ctrls));
+ memset(&ctrl, 0, sizeof(ctrl));
+
+ ctrl.id = V4L2_CID_PIXEL_RATE;
+
+ ctrls.count = 1;
+ ctrls.controls = &ctrl;
+
+ ret = v4l2_g_ext_ctrls(pipe->external->ctrl_handler, &ctrls);
+ if (ret < 0) {
+ dev_warn(isp->dev, "no pixel rate control in subdev %s\n",
+ pipe->external->name);
+ return ret;
+ }
+
+ pipe->external_rate = ctrl.value64;
+
+ return 0;
+}
+
/*
* Stream management
*
@@ -1033,6 +1108,10 @@ isp_video_streamon(struct file *file, void *fh, enum
v4l2_buf_type type)
if (ret < 0)
goto err_check_format;
+ ret = isp_video_check_external_subdevs(pipe);
+ if (ret < 0)
+ goto err_check_format;
+
/* Validate the pipeline and update its state. */
ret = isp_video_validate_pipeline(pipe);
if (ret < 0)
--
1.7.2.5
--
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