media: staging/imx: Implement init_cfg subdev pad op

Implement the init_cfg pad op in all imx-media subdevices. The try
formats are initialized to the current active formats on all pads.

Signed-off-by: Steve Longerbeam <steve_longerbeam@mentor.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/staging/media/imx/imx-ic-prp.c

@@ -462,6 +462,7 @@ static int prp_registered(struct v4l2_subdev *sd)
 }
 
 static const struct v4l2_subdev_pad_ops prp_pad_ops = {
+	.init_cfg = imx_media_init_cfg,
 	.enum_mbus_code = prp_enum_mbus_code,
 	.get_fmt = prp_get_fmt,
 	.set_fmt = prp_set_fmt,

drivers/staging/media/imx/imx-ic-prpencvf.c

@@ -1253,6 +1253,7 @@ static void prp_unregistered(struct v4l2_subdev *sd)
 }
 
 static const struct v4l2_subdev_pad_ops prp_pad_ops = {
+	.init_cfg = imx_media_init_cfg,
 	.enum_mbus_code = prp_enum_mbus_code,
 	.enum_frame_size = prp_enum_frame_size,
 	.get_fmt = prp_get_fmt,

drivers/staging/media/imx/imx-media-csi.c

@@ -1714,6 +1714,7 @@ static const struct v4l2_subdev_video_ops csi_video_ops = {
 };
 
 static const struct v4l2_subdev_pad_ops csi_pad_ops = {
+	.init_cfg = imx_media_init_cfg,
 	.enum_mbus_code = csi_enum_mbus_code,
 	.enum_frame_size = csi_enum_frame_size,
 	.enum_frame_interval = csi_enum_frame_interval,

drivers/staging/media/imx/imx-media-utils.c

@@ -464,6 +464,35 @@ int imx_media_init_mbus_fmt(struct v4l2_mbus_framefmt *mbus,
 }
 EXPORT_SYMBOL_GPL(imx_media_init_mbus_fmt);
 
+/*
+ * Initializes the TRY format to the ACTIVE format on all pads
+ * of a subdev. Can be used as the .init_cfg pad operation.
+ */
+int imx_media_init_cfg(struct v4l2_subdev *sd,
+		       struct v4l2_subdev_pad_config *cfg)
+{
+	struct v4l2_mbus_framefmt *mf_try;
+	struct v4l2_subdev_format format;
+	unsigned int pad;
+	int ret;
+
+	for (pad = 0; pad < sd->entity.num_pads; pad++) {
+		memset(&format, 0, sizeof(format));
+
+		format.pad = pad;
+		format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+		ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &format);
+		if (ret)
+			continue;
+
+		mf_try = v4l2_subdev_get_try_format(sd, cfg, pad);
+		*mf_try = format.format;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(imx_media_init_cfg);
+
 /*
  * Check whether the field and colorimetry parameters in tryfmt are
  * uninitialized, and if so fill them with the values from fmt,

drivers/staging/media/imx/imx-media-vdic.c

@@ -909,6 +909,7 @@ static void vdic_unregistered(struct v4l2_subdev *sd)
 }
 
 static const struct v4l2_subdev_pad_ops vdic_pad_ops = {
+	.init_cfg = imx_media_init_cfg,
 	.enum_mbus_code = vdic_enum_mbus_code,
 	.get_fmt = vdic_get_fmt,
 	.set_fmt = vdic_set_fmt,

drivers/staging/media/imx/imx-media.h

@@ -172,6 +172,8 @@ int imx_media_enum_ipu_format(u32 *code, u32 index, enum codespace_sel cs_sel);
 int imx_media_init_mbus_fmt(struct v4l2_mbus_framefmt *mbus,
 			    u32 width, u32 height, u32 code, u32 field,
 			    const struct imx_media_pixfmt **cc);
+int imx_media_init_cfg(struct v4l2_subdev *sd,
+		       struct v4l2_subdev_pad_config *cfg);
 void imx_media_fill_default_mbus_fields(struct v4l2_mbus_framefmt *tryfmt,
 					struct v4l2_mbus_framefmt *fmt,
 					bool ic_route);

drivers/staging/media/imx/imx6-mipi-csi2.c

@@ -531,6 +531,7 @@ static const struct v4l2_subdev_video_ops csi2_video_ops = {
 };
 
 static const struct v4l2_subdev_pad_ops csi2_pad_ops = {
+	.init_cfg = imx_media_init_cfg,
 	.get_fmt = csi2_get_fmt,
 	.set_fmt = csi2_set_fmt,
 };