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authorNiklas Söderlund <niklas.soderlund+renesas@ragnatech.se>2017-01-31 10:08:31 -0200
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2017-02-08 10:32:11 -0200
commite22f709e055e0e71d65ae9bb9bf6d32c31f3a1ac (patch)
tree16f136794a2e3ba1e06913a945c58183cf278fe4 /drivers/media
parentd2fe28feaebbbbe147e5e6e7bc68857f9bd7f6ad (diff)
[media] v4l: of: check for unique lanes in data-lanes and clock-lanes
All lanes in data-lanes and clock-lanes properties should be unique. Add a check for this in v4l2_of_parse_csi_bus() and print a warning if duplicated lanes are found. Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/v4l2-core/v4l2-of.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/media/v4l2-core/v4l2-of.c b/drivers/media/v4l2-core/v4l2-of.c
index 93b33681776c..4f59f442dd0a 100644
--- a/drivers/media/v4l2-core/v4l2-of.c
+++ b/drivers/media/v4l2-core/v4l2-of.c
@@ -26,7 +26,7 @@ static int v4l2_of_parse_csi_bus(const struct device_node *node,
struct v4l2_of_bus_mipi_csi2 *bus = &endpoint->bus.mipi_csi2;
struct property *prop;
bool have_clk_lane = false;
- unsigned int flags = 0;
+ unsigned int flags = 0, lanes_used = 0;
u32 v;
prop = of_find_property(node, "data-lanes", NULL);
@@ -38,6 +38,12 @@ static int v4l2_of_parse_csi_bus(const struct device_node *node,
lane = of_prop_next_u32(prop, lane, &v);
if (!lane)
break;
+
+ if (lanes_used & BIT(v))
+ pr_warn("%s: duplicated lane %u in data-lanes\n",
+ node->full_name, v);
+ lanes_used |= BIT(v);
+
bus->data_lanes[i] = v;
}
bus->num_data_lanes = i;
@@ -63,6 +69,11 @@ static int v4l2_of_parse_csi_bus(const struct device_node *node,
}
if (!of_property_read_u32(node, "clock-lanes", &v)) {
+ if (lanes_used & BIT(v))
+ pr_warn("%s: duplicated lane %u in clock-lanes\n",
+ node->full_name, v);
+ lanes_used |= BIT(v);
+
bus->clock_lane = v;
have_clk_lane = true;
}

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