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path: root/drivers/media/v4l2-core/v4l2-fwnode.c
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Diffstat (limited to 'drivers/media/v4l2-core/v4l2-fwnode.c')
-rw-r--r--drivers/media/v4l2-core/v4l2-fwnode.c139
1 files changed, 94 insertions, 45 deletions
diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c
index 153c53ca3925..40b2fbfe8865 100644
--- a/drivers/media/v4l2-core/v4l2-fwnode.c
+++ b/drivers/media/v4l2-core/v4l2-fwnode.c
@@ -28,8 +28,16 @@
#include <media/v4l2-fwnode.h>
-static int v4l2_fwnode_endpoint_parse_csi_bus(struct fwnode_handle *fwnode,
- struct v4l2_fwnode_endpoint *vep)
+enum v4l2_fwnode_bus_type {
+ V4L2_FWNODE_BUS_TYPE_GUESS = 0,
+ V4L2_FWNODE_BUS_TYPE_CSI2_CPHY,
+ V4L2_FWNODE_BUS_TYPE_CSI1,
+ V4L2_FWNODE_BUS_TYPE_CCP2,
+ NR_OF_V4L2_FWNODE_BUS_TYPE,
+};
+
+static int v4l2_fwnode_endpoint_parse_csi2_bus(struct fwnode_handle *fwnode,
+ struct v4l2_fwnode_endpoint *vep)
{
struct v4l2_fwnode_bus_mipi_csi2 *bus = &vep->bus.mipi_csi2;
bool have_clk_lane = false;
@@ -40,10 +48,10 @@ static int v4l2_fwnode_endpoint_parse_csi_bus(struct fwnode_handle *fwnode,
rval = fwnode_property_read_u32_array(fwnode, "data-lanes", NULL, 0);
if (rval > 0) {
- u32 array[ARRAY_SIZE(bus->data_lanes)];
+ u32 array[1 + V4L2_FWNODE_CSI2_MAX_DATA_LANES];
bus->num_data_lanes =
- min_t(int, ARRAY_SIZE(bus->data_lanes), rval);
+ min_t(int, V4L2_FWNODE_CSI2_MAX_DATA_LANES, rval);
fwnode_property_read_u32_array(fwnode, "data-lanes", array,
bus->num_data_lanes);
@@ -56,24 +64,25 @@ static int v4l2_fwnode_endpoint_parse_csi_bus(struct fwnode_handle *fwnode,
bus->data_lanes[i] = array[i];
}
- }
-
- rval = fwnode_property_read_u32_array(fwnode, "lane-polarities", NULL,
- 0);
- if (rval > 0) {
- u32 array[ARRAY_SIZE(bus->lane_polarities)];
- if (rval < 1 + bus->num_data_lanes /* clock + data */) {
- pr_warn("too few lane-polarities entries (need %u, got %u)\n",
- 1 + bus->num_data_lanes, rval);
- return -EINVAL;
+ rval = fwnode_property_read_u32_array(fwnode,
+ "lane-polarities", NULL,
+ 0);
+ if (rval > 0) {
+ if (rval != 1 + bus->num_data_lanes /* clock+data */) {
+ pr_warn("invalid number of lane-polarities entries (need %u, got %u)\n",
+ 1 + bus->num_data_lanes, rval);
+ return -EINVAL;
+ }
+
+ fwnode_property_read_u32_array(fwnode,
+ "lane-polarities", array,
+ 1 + bus->num_data_lanes);
+
+ for (i = 0; i < 1 + bus->num_data_lanes; i++)
+ bus->lane_polarities[i] = array[i];
}
- fwnode_property_read_u32_array(fwnode, "lane-polarities", array,
- 1 + bus->num_data_lanes);
-
- for (i = 0; i < 1 + bus->num_data_lanes; i++)
- bus->lane_polarities[i] = array[i];
}
if (!fwnode_property_read_u32(fwnode, "clock-lanes", &v)) {
@@ -146,6 +155,32 @@ static void v4l2_fwnode_endpoint_parse_parallel_bus(
}
+static 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
@@ -168,6 +203,7 @@ static void v4l2_fwnode_endpoint_parse_parallel_bus(
int v4l2_fwnode_endpoint_parse(struct fwnode_handle *fwnode,
struct v4l2_fwnode_endpoint *vep)
{
+ u32 bus_type = 0;
int rval;
fwnode_graph_parse_endpoint(fwnode, &vep->base);
@@ -176,17 +212,30 @@ int v4l2_fwnode_endpoint_parse(struct fwnode_handle *fwnode,
memset(&vep->bus_type, 0, sizeof(*vep) -
offsetof(typeof(*vep), bus_type));
- rval = v4l2_fwnode_endpoint_parse_csi_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;
+ fwnode_property_read_u32(fwnode, "bus-type", &bus_type);
+
+ 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);
@@ -247,23 +296,23 @@ struct v4l2_fwnode_endpoint *v4l2_fwnode_endpoint_alloc_parse(
rval = fwnode_property_read_u64_array(fwnode, "link-frequencies",
NULL, 0);
- if (rval < 0)
- goto out_err;
-
- vep->link_frequencies =
- kmalloc_array(rval, sizeof(*vep->link_frequencies), GFP_KERNEL);
- if (!vep->link_frequencies) {
- rval = -ENOMEM;
- goto out_err;
- }
+ if (rval > 0) {
+ vep->link_frequencies =
+ kmalloc_array(rval, sizeof(*vep->link_frequencies),
+ GFP_KERNEL);
+ if (!vep->link_frequencies) {
+ rval = -ENOMEM;
+ goto out_err;
+ }
- vep->nr_of_link_frequencies = rval;
+ vep->nr_of_link_frequencies = rval;
- rval = fwnode_property_read_u64_array(fwnode, "link-frequencies",
- vep->link_frequencies,
- vep->nr_of_link_frequencies);
- if (rval < 0)
- goto out_err;
+ rval = fwnode_property_read_u64_array(
+ fwnode, "link-frequencies", vep->link_frequencies,
+ vep->nr_of_link_frequencies);
+ if (rval < 0)
+ goto out_err;
+ }
return vep;