From: Sakari Ailus <sakari.ailus@xxxxxx>
The CSI-1 will need these as well, separate them into a different function.
have_clk_lane and num_data_lanes arguments may be NULL; the CSI-1 bus will
have no use for them.
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxx>
---
drivers/media/v4l2-core/v4l2-of.c | 60 +++++++++++++++++++++++++++++----------
1 file changed, 45 insertions(+), 15 deletions(-)
diff --git a/drivers/media/v4l2-core/v4l2-of.c b/drivers/media/v4l2-core/v4l2-of.c
index 5304137..60bbc5f 100644
--- a/drivers/media/v4l2-core/v4l2-of.c
+++ b/drivers/media/v4l2-core/v4l2-of.c
@@ -25,53 +25,83 @@ enum v4l2_of_bus_type {
V4L2_OF_BUS_TYPE_PARALLEL,
};
-static int v4l2_of_parse_csi2_bus(const struct device_node *node,
- struct v4l2_of_endpoint *endpoint)
+static int v4l2_of_parse_lanes(const struct device_node *node,
+ unsigned char *clock_lane,
+ bool *have_clk_lane,
+ unsigned char *data_lanes,
+ bool *lane_polarities,
+ unsigned short *__num_data_lanes,
+ unsigned int max_data_lanes)
{
- struct v4l2_of_bus_mipi_csi2 *bus = &endpoint->bus.mipi_csi2;
struct property *prop;
- bool have_clk_lane = false;
- unsigned int flags = 0;
+ unsigned short num_data_lanes = 0;
u32 v;
prop = of_find_property(node, "data-lanes", NULL);
if (prop) {
const __be32 *lane = NULL;
- unsigned int i;
- for (i = 0; i < ARRAY_SIZE(bus->data_lanes); i++) {
+ for (num_data_lanes = 0; num_data_lanes < max_data_lanes;
+ num_data_lanes++) {
lane = of_prop_next_u32(prop, lane, &v);
if (!lane)
break;
- bus->data_lanes[i] = v;
+ data_lanes[num_data_lanes] = v;
}
- bus->num_data_lanes = i;
}
+ if (__num_data_lanes)
+ *__num_data_lanes = num_data_lanes;
prop = of_find_property(node, "lane-polarities", NULL);
if (prop) {
const __be32 *polarity = NULL;
unsigned int i;
- for (i = 0; i < ARRAY_SIZE(bus->lane_polarities); i++) {
+ for (i = 0; i < 1 + max_data_lanes; i++) {
polarity = of_prop_next_u32(prop, polarity, &v);
if (!polarity)
break;
- bus->lane_polarities[i] = v;
+ lane_polarities[i] = v;
}
- if (i < 1 + bus->num_data_lanes /* clock + data */) {
+ if (i < 1 + num_data_lanes /* clock + data */) {
pr_warn("%s: too few lane-polarities entries (need %u, got %u)\n",
- node->full_name, 1 + bus->num_data_lanes, i);
+ node->full_name, 1 + num_data_lanes, i);
return -EINVAL;
}
}
+ if (have_clk_lane)
+ *have_clk_lane = false;
+
if (!of_property_read_u32(node, "clock-lanes", &v)) {
- bus->clock_lane = v;
- have_clk_lane = true;
+ *clock_lane = v;
+ if (have_clk_lane)
+ *have_clk_lane = true;
}
+ return 0;
+}
+
+static int v4l2_of_parse_csi2_bus(const struct device_node *node,
+ struct v4l2_of_endpoint *endpoint)
+{
+ struct v4l2_of_bus_mipi_csi2 *bus = &endpoint->bus.mipi_csi2;
+ bool have_clk_lane = false;
+ unsigned int flags = 0;
+ int rval;
+ u32 v;
+
+ rval = v4l2_of_parse_lanes(node, &bus->clock_lane, &have_clk_lane,
+ bus->data_lanes, bus->lane_polarities,
+ &bus->num_data_lanes,
+ ARRAY_SIZE(bus->data_lanes));
+ if (rval)
+ return rval;
+
+ BUILD_BUG_ON(1 + ARRAY_SIZE(bus->data_lanes)
+ != ARRAY_SIZE(bus->lane_polarities));
+
if (of_get_property(node, "clock-noncontinuous", &v))
flags |= V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK;
else if (have_clk_lane || bus->num_data_lanes > 0)
--
1.9.1
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