diff options
Diffstat (limited to 'drivers/media/v4l2-core/v4l2-fwnode.c')
-rw-r--r-- | drivers/media/v4l2-core/v4l2-fwnode.c | 139 |
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; |