[PATCH 06/11] media: adv748x-csi2: Implement enum_mbus_codes

[Jacopo Mondi <jacopo.mondi@xxxxxxxxxxxxxxxx>]

Define a list of supported mbus codes for the TXA and TXB CSI-2
transmitters and implement the enum_mbus_code operation.

Signed-off-by: Jacopo Mondi <jacopo.mondi@xxxxxxxxxxxxxxxx>
---
 drivers/media/i2c/adv748x/adv748x-csi2.c | 35 ++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/drivers/media/i2c/adv748x/adv748x-csi2.c b/drivers/media/i2c/adv748x/adv748x-csi2.c
index 9da7f6742a2b..219417b319a6 100644
--- a/drivers/media/i2c/adv748x/adv748x-csi2.c
+++ b/drivers/media/i2c/adv748x/adv748x-csi2.c
@@ -21,6 +21,18 @@ static const struct v4l2_mbus_framefmt adv748x_csi2_default_fmt = {
 	.field = V4L2_FIELD_NONE,
 };
 
+static const unsigned int adv748x_csi2_txa_fmts[] = {
+	MEDIA_BUS_FMT_YUYV8_1X16,
+	MEDIA_BUS_FMT_YUYV10_1X20,
+	MEDIA_BUS_FMT_RGB565_1X16,
+	MEDIA_BUS_FMT_RGB666_1X18,
+	MEDIA_BUS_FMT_RGB888_1X24,
+};
+
+static const unsigned int adv748x_csi2_txb_fmts[] = {
+	MEDIA_BUS_FMT_YUYV8_1X16,
+};
+
 int adv748x_csi2_set_virtual_channel(struct adv748x_csi2 *tx, unsigned int vc)
 {
 	return tx_write(tx, ADV748X_CSI_VC_REF, vc << ADV748X_CSI_VC_REF_SHIFT);
@@ -146,6 +158,28 @@ static const struct v4l2_subdev_video_ops adv748x_csi2_video_ops = {
  * But we must support setting the pad formats for format propagation.
  */
 
+static int adv748x_csi2_enum_mbus_code(struct v4l2_subdev *sd,
+				       struct v4l2_subdev_state *sd_state,
+				       struct v4l2_subdev_mbus_code_enum *code)
+{
+	struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd);
+	const unsigned int *codes = is_txa(tx) ?
+				    adv748x_csi2_txa_fmts :
+				    adv748x_csi2_txb_fmts;
+	size_t num_fmts = is_txa(tx) ? ARRAY_SIZE(adv748x_csi2_txa_fmts)
+				     : ARRAY_SIZE(adv748x_csi2_txb_fmts);
+
+	if (code->pad != ADV748X_CSI2_SOURCE)
+		return -EINVAL;
+
+	if (code->index >= num_fmts)
+		return -EINVAL;
+
+	code->code = codes[code->index];
+
+	return 0;
+}
+
 static struct v4l2_mbus_framefmt *
 adv748x_csi2_get_pad_format(struct v4l2_subdev *sd,
 			    struct v4l2_subdev_state *sd_state,
@@ -235,6 +269,7 @@ static int adv748x_csi2_get_mbus_config(struct v4l2_subdev *sd, unsigned int pad
 }
 
 static const struct v4l2_subdev_pad_ops adv748x_csi2_pad_ops = {
+	.enum_mbus_code = adv748x_csi2_enum_mbus_code,
 	.get_fmt = adv748x_csi2_get_format,
 	.set_fmt = adv748x_csi2_set_format,
 	.get_mbus_config = adv748x_csi2_get_mbus_config,
-- 
2.44.0