diff mbox

[09/15] media: soc_camera pad-aware driver initialisation

Message ID 1435224669-23672-10-git-send-email-william.towle@codethink.co.uk (mailing list archive)
State New, archived
Headers show

Commit Message

William Towle June 25, 2015, 9:31 a.m. UTC 
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@codethink.co.uk>
Signed-off-by: Rob Taylor <rob.taylor@codethink.co.uk>
---
 drivers/media/platform/soc_camera/Kconfig      |    1 +
 drivers/media/platform/soc_camera/rcar_vin.c   |    1 +
 drivers/media/platform/soc_camera/soc_camera.c |   36 ++++++++++++++++++++++++
 include/media/soc_camera.h                     |    1 +
 4 files changed, 39 insertions(+)
diff mbox

Patch

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..8d4d20c 100644
--- a/drivers/media/platform/soc_camera/soc_camera.c
+++ b/drivers/media/platform/soc_camera/soc_camera.c
@@ -1293,6 +1293,9 @@  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;
+#endif
 	int ret;
 
 	sd->grp_id = soc_camera_grp_id(icd);
@@ -1310,8 +1313,33 @@  static int soc_camera_probe_finish(struct soc_camera_device *icd)
 		return ret;
 	}
 
+	icd->src_pad_idx = 0;
+#if defined(CONFIG_MEDIA_CONTROLLER)
 	/* At this point client .probe() should have run already */
+	ret = media_entity_init(&icd->vdev->entity, 1, &pad, 0);
+	if (ret < 0) {
+		goto eusrfmt;
+	} else {
+		int pad_idx;
+
+		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;
+		ret = soc_camera_init_user_formats(icd);
+		if (ret < 0) {
+			icd->src_pad_idx = -1;
+			goto eusrfmt;
+		}
+	}
+#else
 	ret = soc_camera_init_user_formats(icd);
+#endif
+
 	if (ret < 0)
 		goto eusrfmt;
 
@@ -1335,6 +1363,9 @@  static int soc_camera_probe_finish(struct soc_camera_device *icd)
 evidstart:
 	soc_camera_free_user_formats(icd);
 eusrfmt:
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	media_entity_cleanup(&icd->vdev->entity);
+#endif
 	soc_camera_remove_device(icd);
 
 	return ret;
@@ -1856,6 +1887,11 @@  static int soc_camera_remove(struct soc_camera_device *icd)
 	if (icd->num_user_formats)
 		soc_camera_free_user_formats(icd);
 
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	if (icd->vdev->entity.num_pads)
+		media_entity_cleanup(&icd->vdev->entity);
+#endif
+
 	if (icd->clk) {
 		/* For the synchronous case */
 		v4l2_clk_unregister(icd->clk);
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;