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

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>

diff --git a/drivers/media/platform/pxa_camera.c b/drivers/media/platform/pxa_camera.c
index 5c3b7cf..3898a5c 100644 (file)
--- a/drivers/media/platform/pxa_camera.c
+++ b/drivers/media/platform/pxa_camera.c
@@ -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;
 }

diff --git a/drivers/media/platform/soc_camera/soc_mediabus.c b/drivers/media/platform/soc_camera/soc_mediabus.c
index 57581f6..43192d8 100644 (file)
--- a/drivers/media/platform/soc_camera/soc_mediabus.c
+++ b/drivers/media/platform/soc_camera/soc_mediabus.c
@@ -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;
 }

diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c
index d71dd39..ca755a4 100644 (file)
--- a/drivers/media/v4l2-core/v4l2-fwnode.c
+++ b/drivers/media/v4l2-core/v4l2-fwnode.c
@@ -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);
-
-       return 0;
+       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;
+       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);
 

diff --git a/include/media/v4l2-fwnode.h b/include/media/v4l2-fwnode.h
index ecc1233..29ae22b 100644 (file)
--- a/include/media/v4l2-fwnode.h
+++ b/include/media/v4l2-fwnode.h
@@ -56,6 +56,24 @@ struct v4l2_fwnode_bus_parallel {
 };
 
 /**
+ * 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
  * @bus_type: bus type
@@ -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;

diff --git a/include/media/v4l2-mediabus.h b/include/media/v4l2-mediabus.h
index 34cc99e..315c167 100644 (file)
--- a/include/media/v4l2-mediabus.h
+++ b/include/media/v4l2-mediabus.h
@@ -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,
 };