On Fri, 24 Jul 2015, Hans Verkuil wrote:
Why would you want to init vdev->entity? soc-camera doesn't create a media controller
device, so there is no point in doing this.
Thanks, I hadn't quite understood that about the code I was
transplanting to/from. Please find an update below.
Cheers,
Wills.
...
Subject: [PATCH] media: soc_camera pad-aware driver initialisation
Add detection of source pad number for drivers aware of the media
controller API, so that the combination of soc_camera and rcar_vin
can create device nodes to support modern drivers such as adv7604.c
(for HDMI on Lager) and the converted adv7180.c (for composite)
underneath.
Building rcar_vin gains a dependency on CONFIG_MEDIA_CONTROLLER, in
line with requirements for building the drivers associated with it.
Signed-off-by: William Towle <william.towle@xxxxxxxxxxxxxxx>
Signed-off-by: Rob Taylor <rob.taylor@xxxxxxxxxxxxxxx>
---
drivers/media/platform/soc_camera/Kconfig | 1 +
drivers/media/platform/soc_camera/rcar_vin.c | 1 +
drivers/media/platform/soc_camera/soc_camera.c | 20 +++++++++++++++++++-
include/media/soc_camera.h | 1 +
4 files changed, 22 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/soc_camera/Kconfig b/drivers/media/platform/soc_camera/Kconfig
index f2776cd..5c45c83 100644
--- a/drivers/media/platform/soc_camera/Kconfig
+++ b/drivers/media/platform/soc_camera/Kconfig
@@ -38,6 +38,7 @@ config VIDEO_RCAR_VIN
depends on VIDEO_DEV && SOC_CAMERA
depends on ARCH_SHMOBILE || COMPILE_TEST
depends on HAS_DMA
+ depends on MEDIA_CONTROLLER
select VIDEOBUF2_DMA_CONTIG
select SOC_CAMERA_SCALE_CROP
---help---
diff --git a/drivers/media/platform/soc_camera/rcar_vin.c b/drivers/media/platform/soc_camera/rcar_vin.c
index 16352a8..00c1034 100644
--- a/drivers/media/platform/soc_camera/rcar_vin.c
+++ b/drivers/media/platform/soc_camera/rcar_vin.c
@@ -1359,6 +1359,7 @@ static int rcar_vin_get_formats(struct soc_camera_device *icd, unsigned int idx,
struct device *dev = icd->parent;
int shift;
+ fmt.pad = icd->src_pad_idx;
ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
if (ret < 0)
return ret;
diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c
index d708df4..82d3ebe 100644
--- a/drivers/media/platform/soc_camera/soc_camera.c
+++ b/drivers/media/platform/soc_camera/soc_camera.c
@@ -1293,6 +1293,10 @@ static int soc_camera_probe_finish(struct soc_camera_device *icd)
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
};
struct v4l2_mbus_framefmt *mf = &fmt.format;
+#if defined(CONFIG_MEDIA_CONTROLLER)
+ struct media_pad pad;
+ int pad_idx;
+#endif
int ret;
sd->grp_id = soc_camera_grp_id(icd);
@@ -1311,9 +1315,23 @@ static int soc_camera_probe_finish(struct soc_camera_device *icd)
}
/* At this point client .probe() should have run already */
+ icd->src_pad_idx = 0;
+#if defined(CONFIG_MEDIA_CONTROLLER)
+ for (pad_idx = 0; pad_idx < sd->entity.num_pads; pad_idx++)
+ if (sd->entity.pads[pad_idx].flags
+ == MEDIA_PAD_FL_SOURCE)
+ break;
+ if (pad_idx >= sd->entity.num_pads)
+ goto eusrfmt;
+
+ icd->src_pad_idx = pad_idx;
+#endif
+
ret = soc_camera_init_user_formats(icd);
- if (ret < 0)
+ if (ret < 0) {
+ icd->src_pad_idx = -1;
goto eusrfmt;
+ }
icd->field = V4L2_FIELD_ANY;
diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h
index 2f6261f..30193cf 100644
--- a/include/media/soc_camera.h
+++ b/include/media/soc_camera.h
@@ -42,6 +42,7 @@ struct soc_camera_device {
unsigned char devnum; /* Device number per host */
struct soc_camera_sense *sense; /* See comment in struct definition */
struct video_device *vdev;
+ int src_pad_idx; /* For media-controller drivers */
struct v4l2_ctrl_handler ctrl_handler;
const struct soc_camera_format_xlate *current_fmt;
struct soc_camera_format_xlate *user_formats;
--
1.7.10.4
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