Perform CCDC link validation in ccdc_link_validate() instead of
isp_video_validate_pipeline(). Also perform maximum data rate check in
isp_video_check_external_subdevs().
Signed-off-by: Sakari Ailus sakari.ai...@iki.fi
---
drivers/media/video/omap3isp/ispccdc.c | 65 +
drivers/media/video/omap3isp/ispvideo.c | 94 ---
2 files changed, 76 insertions(+), 83 deletions(-)
diff --git a/drivers/media/video/omap3isp/ispccdc.c
b/drivers/media/video/omap3isp/ispccdc.c
index cd1bf6d..84f230e 100644
--- a/drivers/media/video/omap3isp/ispccdc.c
+++ b/drivers/media/video/omap3isp/ispccdc.c
@@ -2000,6 +2000,69 @@ static int ccdc_set_format(struct v4l2_subdev *sd,
struct v4l2_subdev_fh *fh,
}
/*
+ * Decide whether desired output pixel code can be obtained with
+ * the lane shifter by shifting the input pixel code.
+ * @in: input pixelcode to shifter
+ * @out: output pixelcode from shifter
+ * @additional_shift: # of bits the sensor's LSB is offset from CAMEXT[0]
+ *
+ * return true if the combination is possible
+ * return false otherwise
+ */
+static bool ccdc_is_shiftable(enum v4l2_mbus_pixelcode in,
+ enum v4l2_mbus_pixelcode out,
+ unsigned int additional_shift)
+{
+ const struct isp_format_info *in_info, *out_info;
+
+ if (in == out)
+ return true;
+
+ in_info = omap3isp_video_format_info(in);
+ out_info = omap3isp_video_format_info(out);
+
+ if ((in_info-flavor == 0) || (out_info-flavor == 0))
+ return false;
+
+ if (in_info-flavor != out_info-flavor)
+ return false;
+
+ return in_info-bpp - out_info-bpp + additional_shift = 6;
+}
+
+static int ccdc_link_validate(struct v4l2_subdev *sd,
+ struct media_link *link,
+ struct v4l2_subdev_format *source_fmt,
+ struct v4l2_subdev_format *sink_fmt)
+{
+ struct isp_ccdc_device *ccdc = v4l2_get_subdevdata(sd);
+ unsigned long parallel_shift;
+
+ /* Check if the two ends match */
+ if (source_fmt-format.width != sink_fmt-format.width ||
+ source_fmt-format.height != sink_fmt-format.height)
+ return -EPIPE;
+
+ /* We've got a parallel sensor here. */
+ if (ccdc-input == CCDC_INPUT_PARALLEL) {
+ struct isp_parallel_platform_data *pdata =
+ ((struct isp_v4l2_subdevs_group *)
+ media_entity_to_v4l2_subdev(link-source-entity)
+ -host_priv)-bus.parallel;
+ parallel_shift = pdata-data_lane_shift * 2;
+ } else {
+ parallel_shift = 0;
+ }
+
+ /* Lane shifter may be used to drop bits on CCDC sink pad */
+ if (!ccdc_is_shiftable(source_fmt-format.code,
+ sink_fmt-format.code, parallel_shift))
+ return -EPIPE;
+
+ return 0;
+}
+
+/*
* ccdc_init_formats - Initialize formats on all pads
* @sd: ISP CCDC V4L2 subdevice
* @fh: V4L2 subdev file handle
@@ -2041,6 +2104,7 @@ static const struct v4l2_subdev_pad_ops ccdc_v4l2_pad_ops
= {
.enum_frame_size = ccdc_enum_frame_size,
.get_fmt = ccdc_get_format,
.set_fmt = ccdc_set_format,
+ .link_validate = ccdc_link_validate,
};
/* V4L2 subdev operations */
@@ -2150,6 +2214,7 @@ static int ccdc_link_setup(struct media_entity *entity,
/* media operations */
static const struct media_entity_operations ccdc_media_ops = {
.link_setup = ccdc_link_setup,
+ .link_validate = v4l2_subdev_link_validate,
};
void omap3isp_ccdc_unregister_entities(struct isp_ccdc_device *ccdc)
diff --git a/drivers/media/video/omap3isp/ispvideo.c
b/drivers/media/video/omap3isp/ispvideo.c
index 6d4ad87..51075b3 100644
--- a/drivers/media/video/omap3isp/ispvideo.c
+++ b/drivers/media/video/omap3isp/ispvideo.c
@@ -130,37 +130,6 @@ omap3isp_video_format_info(enum v4l2_mbus_pixelcode code)
}
/*
- * Decide whether desired output pixel code can be obtained with
- * the lane shifter by shifting the input pixel code.
- * @in: input pixelcode to shifter
- * @out: output pixelcode from shifter
- * @additional_shift: # of bits the sensor's LSB is offset from CAMEXT[0]
- *
- * return true if the combination is possible
- * return false otherwise
- */
-static bool isp_video_is_shiftable(enum v4l2_mbus_pixelcode in,
- enum v4l2_mbus_pixelcode out,
- unsigned int additional_shift)
-{
- const struct isp_format_info *in_info, *out_info;
-
- if (in == out)
- return true;
-
- in_info = omap3isp_video_format_info(in);
- out_info = omap3isp_video_format_info(out);
-
- if ((in_info-flavor == 0) || (out_info-flavor == 0))
- return false;
-
- if (in_info-flavor != out_info-flavor)
- return false;
-
- return
