Add media bus configuration types and two subdev operations to get
supported mediabus configurations and to set a specific configuration.
Subdevs can support several configurations, e.g., they can send video data
on 1 or several lanes, can be configured to use a specific CSI-2 channel,
in such cases subdevice drivers return bitmasks with all respective bits
set. When a set-configuration operation is called, it has to specify a
non-ambiguous configuration.
Signed-off-by: Stanimir Varbanov <svarba...@mm-sol.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovet...@gmx.de>
---
Ok, no more RFC. This is the version I'd like to get into 3.1. Please,
(n)ack vigorously;) Mauro, if this is accepted, would you like me to push
it via my tree or would you take it from the mail?
v5: removed all traces of v4l2-mediabus.c and
v4l2_mbus_config_compatible()
include/media/v4l2-mediabus.h | 63 ++++++++++++++++++++++++++++++++++++++++++
include/media/v4l2-subdev.h | 10 ++++++
2 files changed, 73 insertions(+)
diff --git a/include/media/v4l2-mediabus.h b/include/media/v4l2-mediabus.h
index 971c7fa..e0fb39a 100644
--- a/include/media/v4l2-mediabus.h
+++ b/include/media/v4l2-mediabus.h
@@ -13,6 +13,69 @@
#include <linux/v4l2-mediabus.h>
+/* Parallel flags */
+/*
+ * Can the client run in master or in slave mode. By "Master mode" an operation
+ * mode is meant, when the client (e.g., a camera sensor) is producing
+ * horizontal and vertical synchronisation. In "Slave mode" the host is
+ * providing these signals to the slave.
+ */
+#define V4L2_MBUS_MASTER (1 << 0)
+#define V4L2_MBUS_SLAVE (1 << 1)
+/* Which signal polarities it supports */
+/* Note: in BT.656 mode HSYNC and VSYNC are unused */
+#define V4L2_MBUS_HSYNC_ACTIVE_HIGH (1 << 2)
+#define V4L2_MBUS_HSYNC_ACTIVE_LOW (1 << 3)
+#define V4L2_MBUS_VSYNC_ACTIVE_HIGH (1 << 4)
+#define V4L2_MBUS_VSYNC_ACTIVE_LOW (1 << 5)
+#define V4L2_MBUS_PCLK_SAMPLE_RISING (1 << 6)
+#define V4L2_MBUS_PCLK_SAMPLE_FALLING (1 << 7)
+#define V4L2_MBUS_DATA_ACTIVE_HIGH (1 << 8)
+#define V4L2_MBUS_DATA_ACTIVE_LOW (1 << 9)
+
+/* Serial flags */
+/* How many lanes the client can use */
+#define V4L2_MBUS_CSI2_1_LANE (1 << 0)
+#define V4L2_MBUS_CSI2_2_LANE (1 << 1)
+#define V4L2_MBUS_CSI2_3_LANE (1 << 2)
+#define V4L2_MBUS_CSI2_4_LANE (1 << 3)
+/* On which channels it can send video data */
+#define V4L2_MBUS_CSI2_CHANNEL_0 (1 << 4)
+#define V4L2_MBUS_CSI2_CHANNEL_1 (1 << 5)
+#define V4L2_MBUS_CSI2_CHANNEL_2 (1 << 6)
+#define V4L2_MBUS_CSI2_CHANNEL_3 (1 << 7)
+/* Does it support only continuous or also non-continuous clock mode */
+#define V4L2_MBUS_CSI2_CONTINUOUS_CLOCK (1 << 8)
+#define V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK (1 << 9)
+
+#define V4L2_MBUS_CSI2_LANES (V4L2_MBUS_CSI2_1_LANE |
V4L2_MBUS_CSI2_2_LANE | \
+ V4L2_MBUS_CSI2_3_LANE |
V4L2_MBUS_CSI2_4_LANE)
+#define V4L2_MBUS_CSI2_CHANNELS (V4L2_MBUS_CSI2_CHANNEL_0 |
V4L2_MBUS_CSI2_CHANNEL_1 | \
+ V4L2_MBUS_CSI2_CHANNEL_2 |
V4L2_MBUS_CSI2_CHANNEL_3)
+
+/**
+ * v4l2_mbus_type - media bus type
+ * @V4L2_MBUS_PARALLEL: parallel interface with hsync and vsync
+ * @V4L2_MBUS_BT656: parallel interface with embedded synchronisation, can
+ * also be used for BT.1120
+ * @V4L2_MBUS_CSI2: MIPI CSI-2 serial interface
+ */
+enum v4l2_mbus_type {
+ V4L2_MBUS_PARALLEL,
+ V4L2_MBUS_BT656,
+ V4L2_MBUS_CSI2,
+};
+
+/**
+ * v4l2_mbus_config - media bus configuration
+ * @type: in: interface type
+ * @flags: in / out: configuration flags, depending on @type
+ */
+struct v4l2_mbus_config {
+ enum v4l2_mbus_type type;
+ unsigned int flags;
+};
+
static inline void v4l2_fill_pix_format(struct v4l2_pix_format *pix_fmt,
const struct v4l2_mbus_framefmt *mbus_fmt)
{
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index 1562c4f..a42fb25 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -255,6 +255,12 @@ struct v4l2_subdev_audio_ops {
try_mbus_fmt: try to set a pixel format on a video data source
s_mbus_fmt: set a pixel format on a video data source
+
+ g_mbus_config: get supported mediabus configurations
+
+ s_mbus_config: set a certain mediabus configuration. This operation is added
+ for compatibility with soc-camera drivers and should not be used by new
+ software.
*/
struct v4l2_subdev_video_ops {
int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32
config);
@@ -294,6 +300,10 @@ struct v4l2_subdev_video_ops {
struct v4l2_mbus_framefmt *fmt);
int (*s_mbus_fmt)(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *fmt);
+ int (*g_mbus_config)(struct v4l2_subdev *sd,
+ struct v4l2_mbus_config *cfg);
+ int (*s_mbus_config)(struct v4l2_subdev *sd,
+ const struct v4l2_mbus_config *cfg);
};
/*
--
1.7.2.5
--
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