media: camss: use proper media entity function for subdevices

Currently for msm_csiphy, msm_csid, and msm_ispif subdevices the media
entity function field is set to MEDIA_ENT_F_IO_V4L. This is incorrect
as MEDIA_ENT_F_IO_V4L implies V4L2 video node.

Change it to MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER as this is the best
fit from the functions defined in include/uapi/linux/media.h.
Signed-off-by: Andrey Konovalov <andrey.konovalov@linaro.org>
Tested-by: Robert Foss <robert.foss@linaro.org>
Reviewed-by: Robert Foss <robert.foss@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/platform/qcom/camss/camss-csid.c

@@ -1358,7 +1358,7 @@ int msm_csid_register_entity(struct csid_device *csid,
 	pads[MSM_CSID_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
 	pads[MSM_CSID_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE;
 
-	sd->entity.function = MEDIA_ENT_F_IO_V4L;
+	sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
 	sd->entity.ops = &csid_media_ops;
 	ret = media_entity_pads_init(&sd->entity, MSM_CSID_PADS_NUM, pads);
 	if (ret < 0) {

drivers/media/platform/qcom/camss/camss-csiphy.c

@@ -737,7 +737,7 @@ int msm_csiphy_register_entity(struct csiphy_device *csiphy,
 	pads[MSM_CSIPHY_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
 	pads[MSM_CSIPHY_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE;
 
-	sd->entity.function = MEDIA_ENT_F_IO_V4L;
+	sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
 	sd->entity.ops = &csiphy_media_ops;
 	ret = media_entity_pads_init(&sd->entity, MSM_CSIPHY_PADS_NUM, pads);
 	if (ret < 0) {

drivers/media/platform/qcom/camss/camss-ispif.c

@@ -1325,7 +1325,7 @@ int msm_ispif_register_entities(struct ispif_device *ispif,
 		pads[MSM_ISPIF_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
 		pads[MSM_ISPIF_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE;
 
-		sd->entity.function = MEDIA_ENT_F_IO_V4L;
+		sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
 		sd->entity.ops = &ispif_media_ops;
 		ret = media_entity_pads_init(&sd->entity, MSM_ISPIF_PADS_NUM,
 					     pads);