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| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2022-06-14 20:11:11 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2022-07-17 12:29:53 +0100 |
| commit | 8b52ec2d1896223d620c27688024168194d7482b (patch) | |
| tree | 4e7659aa0d5cf9935f268ca5ffab0a2554bd0104 /drivers/media | |
| parent | 222c04550e2f6a145927ba2178e95777fe66d4d3 (diff) | |
| download | linux-8b52ec2d1896223d620c27688024168194d7482b.tar.bz2 | |
media: rkisp1: isp: Disallow multiple active sources
The ISP supports multiple source subdevs, but can only capture from a
single one at a time. The source is selected through link setup. The
driver finds the active source in its .s_stream() handler using the
media_entity_remote_pad() function. This fails to reject invalid
configurations with multiple active sources. Fix it by using the
media_pad_remote_pad_unique() helper instead, and inline
rkisp1_isp_get_source() in rkisp1_isp_s_stream() as the function is
small and has a single caller.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Dafna Hirschfeld <dafna@fastmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c | 30 |
1 files changed, 13 insertions, 17 deletions
diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c index 37623b73b1d9..d7e2802d11f5 100644 --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c @@ -58,20 +58,6 @@ * Helpers */ -static struct v4l2_subdev *rkisp1_isp_get_source(struct v4l2_subdev *sd) -{ - struct media_pad *local, *remote; - struct media_entity *sensor_me; - - local = &sd->entity.pads[RKISP1_ISP_PAD_SINK_VIDEO]; - remote = media_pad_remote_pad_first(local); - if (!remote) - return NULL; - - sensor_me = remote->entity; - return media_entity_to_v4l2_subdev(sensor_me); -} - static struct v4l2_mbus_framefmt * rkisp1_isp_get_pad_fmt(struct rkisp1_isp *isp, struct v4l2_subdev_state *sd_state, @@ -743,6 +729,8 @@ static int rkisp1_isp_s_stream(struct v4l2_subdev *sd, int enable) struct rkisp1_isp *isp = to_rkisp1_isp(sd); struct rkisp1_device *rkisp1 = isp->rkisp1; const struct rkisp1_sensor_async *asd; + struct media_pad *source_pad; + struct media_pad *sink_pad; int ret; if (!enable) { @@ -754,10 +742,18 @@ static int rkisp1_isp_s_stream(struct v4l2_subdev *sd, int enable) return 0; } - rkisp1->source = rkisp1_isp_get_source(sd); + sink_pad = &isp->pads[RKISP1_ISP_PAD_SINK_VIDEO]; + source_pad = media_pad_remote_pad_unique(sink_pad); + if (IS_ERR(source_pad)) { + dev_dbg(rkisp1->dev, "Failed to get source for ISP: %ld\n", + PTR_ERR(source_pad)); + return -EPIPE; + } + + rkisp1->source = media_entity_to_v4l2_subdev(source_pad->entity); if (!rkisp1->source) { - dev_warn(rkisp1->dev, "No link between isp and source\n"); - return -ENODEV; + /* This should really not happen, so is not worth a message. */ + return -EPIPE; } asd = container_of(rkisp1->source->asd, struct rkisp1_sensor_async, |