[RFC/PATCH,1/1] v4l: Introduce sensor operation for getting interface configuration
Commit Message
Introduce g_interface_parms sensor operation for getting sensor
interface parameters. These parameters are needed from the host side
to determine it's own configuration.
Signed-off-by: Stanimir Varbanov <svarbanov@mm-sol.com>
---
include/media/v4l2-subdev.h | 42 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 42 insertions(+), 0 deletions(-)
@@ -322,15 +322,57 @@ struct v4l2_subdev_vbi_ops {
int (*s_sliced_fmt)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *fmt);
};
+/* Which interface the sensor use to provide it's image data */
+enum v4l2_subdev_sensor_iface {
+ V4L2_SUBDEV_SENSOR_PARALLEL,
+ V4L2_SUBDEV_SENSOR_SERIAL,
+};
+
+/* Each interface could use the following modes */
+/* Image sensor provides horizontal and vertical sync signals */
+#define V4L2_SUBDEV_SENSOR_MODE_PARALLEL_SYNC 0
+/* BT.656 interface. Embedded sync */
+#define V4L2_SUBDEV_SENSOR_MODE_PARALLEL_ITU 1
+/* MIPI CSI1 */
+#define V4L2_SUBDEV_SENSOR_MODE_SERIAL_CSI1 2
+/* MIPI CSI2 */
+#define V4L2_SUBDEV_SENSOR_MODE_SERIAL_CSI2 3
+
+struct v4l2_subdev_sensor_serial_parms {
+ unsigned char lanes; /* number of lanes used */
+ unsigned char channel; /* virtual channel */
+ unsigned int phy_rate; /* output rate at CSI phy in bps */
+ unsigned int pix_clk; /* pixel clock in Hz */
+};
+
+struct v4l2_subdev_sensor_parallel_parms {
+ unsigned int pix_clk; /* pixel clock in Hz */
+};
+
+struct v4l2_subdev_sensor_interface_parms {
+ enum v4l2_subdev_sensor_iface if_type;
+ unsigned int if_mode;
+ union {
+ struct v4l2_subdev_sensor_serial_parms serial;
+ struct v4l2_subdev_sensor_parallel_parms parallel;
+ } parms;
+};
+
/**
* struct v4l2_subdev_sensor_ops - v4l2-subdev sensor operations
* @g_skip_top_lines: number of lines at the top of the image to be skipped.
* This is needed for some sensors, which always corrupt
* several top lines of the output image, or which send their
* metadata in them.
+ * @g_interface_parms: get sensor interface parameters. The sensor subdev should
+ * fill this structure with current interface params. These
+ * interface parameters are needed on host side to configure
+ * it's own hardware receivers.
*/
struct v4l2_subdev_sensor_ops {
int (*g_skip_top_lines)(struct v4l2_subdev *sd, u32 *lines);
+ int (*g_interface_parms)(struct v4l2_subdev *sd,
+ struct v4l2_subdev_sensor_interface_parms *parms);
};
/*