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media: v4l: Add support for CSI-1 and CCP2 busses

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CCP2 and CSI-1, are older single data lane serial busses.

[mchehab@s-opensource.com: don't use spaces for identation]
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Sakari Ailus 2015-02-25 14:39:11 -05:00 committed by Mauro Carvalho Chehab
parent e07a41f985
commit 97bbdf02d9
5 changed files with 75 additions and 10 deletions
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3
drivers/media/platform/pxa_camera.c
View File

@ -638,6 +638,9 @@ static unsigned int pxa_mbus_config_compatible(const struct v4l2_mbus_config *cf
mipi_clock = common_flags & (V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK |
V4L2_MBUS_CSI2_CONTINUOUS_CLOCK);
return (!mipi_lanes || !mipi_clock) ? 0 : common_flags;
default:
__WARN();
return -EINVAL;
}
return 0;
}

3
drivers/media/platform/soc_camera/soc_mediabus.c
View File

@ -508,6 +508,9 @@ unsigned int soc_mbus_config_compatible(const struct v4l2_mbus_config *cfg,
mipi_clock = common_flags & (V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK |
V4L2_MBUS_CSI2_CONTINUOUS_CLOCK);
return (!mipi_lanes || !mipi_clock) ? 0 : common_flags;
default:
__WARN();
return -EINVAL;
}
return 0;
}

56
drivers/media/v4l2-core/v4l2-fwnode.c
View File

@ -154,6 +154,31 @@ static void v4l2_fwnode_endpoint_parse_parallel_bus(
}
void v4l2_fwnode_endpoint_parse_csi1_bus(struct fwnode_handle *fwnode,
struct v4l2_fwnode_endpoint *vep,
u32 bus_type)
{
struct v4l2_fwnode_bus_mipi_csi1 *bus = &vep->bus.mipi_csi1;
u32 v;
if (!fwnode_property_read_u32(fwnode, "clock-inv", &v))
bus->clock_inv = v;
if (!fwnode_property_read_u32(fwnode, "strobe", &v))
bus->strobe = v;
if (!fwnode_property_read_u32(fwnode, "data-lanes", &v))
bus->data_lane = v;
if (!fwnode_property_read_u32(fwnode, "clock-lanes", &v))
bus->clock_lane = v;
if (bus_type == V4L2_FWNODE_BUS_TYPE_CCP2)
vep->bus_type = V4L2_MBUS_CCP2;
else
vep->bus_type = V4L2_MBUS_CSI1;
}
/**
* v4l2_fwnode_endpoint_parse() - parse all fwnode node properties
* @fwnode: pointer to the endpoint's fwnode handle
@ -187,17 +212,28 @@ int v4l2_fwnode_endpoint_parse(struct fwnode_handle *fwnode,
fwnode_property_read_u32(fwnode, "bus-type", &bus_type);
rval = v4l2_fwnode_endpoint_parse_csi2_bus(fwnode, vep);
if (rval)
return rval;
/*
* Parse the parallel video bus properties only if none
* of the MIPI CSI-2 specific properties were found.
*/
if (vep->bus.mipi_csi2.flags == 0)
v4l2_fwnode_endpoint_parse_parallel_bus(fwnode, vep);
switch (bus_type) {
case V4L2_FWNODE_BUS_TYPE_GUESS:
rval = v4l2_fwnode_endpoint_parse_csi2_bus(fwnode, vep);
if (rval)
return rval;
/*
* Parse the parallel video bus properties only if none
* of the MIPI CSI-2 specific properties were found.
*/
if (vep->bus.mipi_csi2.flags == 0)
v4l2_fwnode_endpoint_parse_parallel_bus(fwnode, vep);
return 0;
return 0;
case V4L2_FWNODE_BUS_TYPE_CCP2:
case V4L2_FWNODE_BUS_TYPE_CSI1:
v4l2_fwnode_endpoint_parse_csi1_bus(fwnode, vep, bus_type);
return 0;
default:
pr_warn("unsupported bus type %u\n", bus_type);
return -EINVAL;
}
}
EXPORT_SYMBOL_GPL(v4l2_fwnode_endpoint_parse);

19
include/media/v4l2-fwnode.h
View File

@ -55,6 +55,24 @@ struct v4l2_fwnode_bus_parallel {
unsigned char data_shift;
};
/**
* struct v4l2_fwnode_bus_mipi_csi1 - CSI-1/CCP2 data bus structure
* @clock_inv: polarity of clock/strobe signal
* false - not inverted, true - inverted
* @strobe: false - data/clock, true - data/strobe
* @lane_polarity: the polarities of the clock (index 0) and data lanes
index (1)
* @data_lane: the number of the data lane
* @clock_lane: the number of the clock lane
*/
struct v4l2_fwnode_bus_mipi_csi1 {
bool clock_inv;
bool strobe;
bool lane_polarity[2];
unsigned char data_lane;
unsigned char clock_lane;
};
/**
* struct v4l2_fwnode_endpoint - the endpoint data structure
* @base: fwnode endpoint of the v4l2_fwnode
@ -72,6 +90,7 @@ struct v4l2_fwnode_endpoint {
enum v4l2_mbus_type bus_type;
union {
struct v4l2_fwnode_bus_parallel parallel;
struct v4l2_fwnode_bus_mipi_csi1 mipi_csi1;
struct v4l2_fwnode_bus_mipi_csi2 mipi_csi2;
} bus;
u64 *link_frequencies;

4
include/media/v4l2-mediabus.h
View File

@ -69,11 +69,15 @@
* @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_CSI1: MIPI CSI-1 serial interface
* @V4L2_MBUS_CCP2: CCP2 (Compact Camera Port 2)
* @V4L2_MBUS_CSI2: MIPI CSI-2 serial interface
*/
enum v4l2_mbus_type {
V4L2_MBUS_PARALLEL,
V4L2_MBUS_BT656,
V4L2_MBUS_CSI1,
V4L2_MBUS_CCP2,
V4L2_MBUS_CSI2,
};