[PATCH v3 01/23] v4l: fwnode: Add debug prints for V4L2 endpoint property parsing
Sakari Ailus
sakari.ailus at linux.intel.com
Wed Sep 12 21:29:20 UTC 2018
Print debug info as standard V4L2 endpoint are parsed.
Signed-off-by: Sakari Ailus <sakari.ailus at linux.intel.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas at ragnatech.se>
Tested-by: Steve Longerbeam <steve_longerbeam at mentor.com>
---
drivers/media/v4l2-core/v4l2-fwnode.c | 108 ++++++++++++++++++++++++++--------
1 file changed, 85 insertions(+), 23 deletions(-)
diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c
index be75d9900667..fc8c63eba10b 100644
--- a/drivers/media/v4l2-core/v4l2-fwnode.c
+++ b/drivers/media/v4l2-core/v4l2-fwnode.c
@@ -66,6 +66,7 @@ static int v4l2_fwnode_endpoint_parse_csi2_bus(struct fwnode_handle *fwnode,
lanes_used |= BIT(array[i]);
bus->data_lanes[i] = array[i];
+ pr_debug("lane %u position %u\n", i, array[i]);
}
rval = fwnode_property_read_u32_array(fwnode,
@@ -82,8 +83,13 @@ static int v4l2_fwnode_endpoint_parse_csi2_bus(struct fwnode_handle *fwnode,
"lane-polarities", array,
1 + bus->num_data_lanes);
- for (i = 0; i < 1 + bus->num_data_lanes; i++)
+ for (i = 0; i < 1 + bus->num_data_lanes; i++) {
bus->lane_polarities[i] = array[i];
+ pr_debug("lane %u polarity %sinverted",
+ i, array[i] ? "" : "not ");
+ }
+ } else {
+ pr_debug("no lane polarities defined, assuming not inverted\n");
}
}
@@ -95,12 +101,15 @@ static int v4l2_fwnode_endpoint_parse_csi2_bus(struct fwnode_handle *fwnode,
bus->clock_lane = v;
have_clk_lane = true;
+ pr_debug("clock lane position %u\n", v);
}
- if (fwnode_property_present(fwnode, "clock-noncontinuous"))
+ if (fwnode_property_present(fwnode, "clock-noncontinuous")) {
flags |= V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK;
- else if (have_clk_lane || bus->num_data_lanes > 0)
+ pr_debug("non-continuous clock\n");
+ } else if (have_clk_lane || bus->num_data_lanes > 0) {
flags |= V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
+ }
bus->flags = flags;
vep->bus_type = V4L2_MBUS_CSI2;
@@ -115,48 +124,69 @@ static void v4l2_fwnode_endpoint_parse_parallel_bus(
unsigned int flags = 0;
u32 v;
- if (!fwnode_property_read_u32(fwnode, "hsync-active", &v))
+ if (!fwnode_property_read_u32(fwnode, "hsync-active", &v)) {
flags |= v ? V4L2_MBUS_HSYNC_ACTIVE_HIGH :
V4L2_MBUS_HSYNC_ACTIVE_LOW;
+ pr_debug("hsync-active %s\n", v ? "high" : "low");
+ }
- if (!fwnode_property_read_u32(fwnode, "vsync-active", &v))
+ if (!fwnode_property_read_u32(fwnode, "vsync-active", &v)) {
flags |= v ? V4L2_MBUS_VSYNC_ACTIVE_HIGH :
V4L2_MBUS_VSYNC_ACTIVE_LOW;
+ pr_debug("vsync-active %s\n", v ? "high" : "low");
+ }
- if (!fwnode_property_read_u32(fwnode, "field-even-active", &v))
+ if (!fwnode_property_read_u32(fwnode, "field-even-active", &v)) {
flags |= v ? V4L2_MBUS_FIELD_EVEN_HIGH :
V4L2_MBUS_FIELD_EVEN_LOW;
+ pr_debug("field-even-active %s\n", v ? "high" : "low");
+ }
+
if (flags)
vep->bus_type = V4L2_MBUS_PARALLEL;
else
vep->bus_type = V4L2_MBUS_BT656;
- if (!fwnode_property_read_u32(fwnode, "pclk-sample", &v))
+ if (!fwnode_property_read_u32(fwnode, "pclk-sample", &v)) {
flags |= v ? V4L2_MBUS_PCLK_SAMPLE_RISING :
V4L2_MBUS_PCLK_SAMPLE_FALLING;
+ pr_debug("pclk-sample %s\n", v ? "high" : "low");
+ }
- if (!fwnode_property_read_u32(fwnode, "data-active", &v))
+ if (!fwnode_property_read_u32(fwnode, "data-active", &v)) {
flags |= v ? V4L2_MBUS_DATA_ACTIVE_HIGH :
V4L2_MBUS_DATA_ACTIVE_LOW;
+ pr_debug("data-active %s\n", v ? "high" : "low");
+ }
- if (fwnode_property_present(fwnode, "slave-mode"))
+ if (fwnode_property_present(fwnode, "slave-mode")) {
+ pr_debug("slave mode\n");
flags |= V4L2_MBUS_SLAVE;
- else
+ } else {
flags |= V4L2_MBUS_MASTER;
+ }
- if (!fwnode_property_read_u32(fwnode, "bus-width", &v))
+ if (!fwnode_property_read_u32(fwnode, "bus-width", &v)) {
bus->bus_width = v;
+ pr_debug("bus-width %u\n", v);
+ }
- if (!fwnode_property_read_u32(fwnode, "data-shift", &v))
+ if (!fwnode_property_read_u32(fwnode, "data-shift", &v)) {
bus->data_shift = v;
+ pr_debug("data-shift %u\n", v);
+ }
- if (!fwnode_property_read_u32(fwnode, "sync-on-green-active", &v))
+ if (!fwnode_property_read_u32(fwnode, "sync-on-green-active", &v)) {
flags |= v ? V4L2_MBUS_VIDEO_SOG_ACTIVE_HIGH :
V4L2_MBUS_VIDEO_SOG_ACTIVE_LOW;
+ pr_debug("sync-on-green-active %s\n", v ? "high" : "low");
+ }
- if (!fwnode_property_read_u32(fwnode, "data-enable-active", &v))
+ if (!fwnode_property_read_u32(fwnode, "data-enable-active", &v)) {
flags |= v ? V4L2_MBUS_DATA_ENABLE_HIGH :
V4L2_MBUS_DATA_ENABLE_LOW;
+ pr_debug("data-enable-active %s\n", v ? "high" : "low");
+ }
bus->flags = flags;
@@ -170,17 +200,25 @@ v4l2_fwnode_endpoint_parse_csi1_bus(struct fwnode_handle *fwnode,
struct v4l2_fwnode_bus_mipi_csi1 *bus = &vep->bus.mipi_csi1;
u32 v;
- if (!fwnode_property_read_u32(fwnode, "clock-inv", &v))
+ if (!fwnode_property_read_u32(fwnode, "clock-inv", &v)) {
bus->clock_inv = v;
+ pr_debug("clock-inv %u\n", v);
+ }
- if (!fwnode_property_read_u32(fwnode, "strobe", &v))
+ if (!fwnode_property_read_u32(fwnode, "strobe", &v)) {
bus->strobe = v;
+ pr_debug("strobe %u\n", v);
+ }
- if (!fwnode_property_read_u32(fwnode, "data-lanes", &v))
+ if (!fwnode_property_read_u32(fwnode, "data-lanes", &v)) {
bus->data_lane = v;
+ pr_debug("data-lanes %u\n", v);
+ }
- if (!fwnode_property_read_u32(fwnode, "clock-lanes", &v))
+ if (!fwnode_property_read_u32(fwnode, "clock-lanes", &v)) {
bus->clock_lane = v;
+ pr_debug("clock-lanes %u\n", v);
+ }
if (bus_type == V4L2_FWNODE_BUS_TYPE_CCP2)
vep->bus_type = V4L2_MBUS_CCP2;
@@ -188,12 +226,14 @@ v4l2_fwnode_endpoint_parse_csi1_bus(struct fwnode_handle *fwnode,
vep->bus_type = V4L2_MBUS_CSI1;
}
-int v4l2_fwnode_endpoint_parse(struct fwnode_handle *fwnode,
- struct v4l2_fwnode_endpoint *vep)
+static int __v4l2_fwnode_endpoint_parse(struct fwnode_handle *fwnode,
+ struct v4l2_fwnode_endpoint *vep)
{
u32 bus_type = 0;
int rval;
+ pr_debug("===== begin V4L2 endpoint properties\n");
+
fwnode_graph_parse_endpoint(fwnode, &vep->base);
/* Zero fields from bus_type to until the end */
@@ -214,16 +254,30 @@ int v4l2_fwnode_endpoint_parse(struct fwnode_handle *fwnode,
if (vep->bus.mipi_csi2.flags == 0)
v4l2_fwnode_endpoint_parse_parallel_bus(fwnode, vep);
- return 0;
+ break;
case V4L2_FWNODE_BUS_TYPE_CCP2:
case V4L2_FWNODE_BUS_TYPE_CSI1:
v4l2_fwnode_endpoint_parse_csi1_bus(fwnode, vep, bus_type);
- return 0;
+ break;
default:
pr_warn("unsupported bus type %u\n", bus_type);
return -EINVAL;
}
+
+ return 0;
+}
+
+int v4l2_fwnode_endpoint_parse(struct fwnode_handle *fwnode,
+ struct v4l2_fwnode_endpoint *vep)
+{
+ int ret;
+
+ ret = __v4l2_fwnode_endpoint_parse(fwnode, vep);
+
+ pr_debug("===== end V4L2 endpoint properties\n");
+
+ return ret;
}
EXPORT_SYMBOL_GPL(v4l2_fwnode_endpoint_parse);
@@ -247,13 +301,15 @@ struct v4l2_fwnode_endpoint *v4l2_fwnode_endpoint_alloc_parse(
if (!vep)
return ERR_PTR(-ENOMEM);
- rval = v4l2_fwnode_endpoint_parse(fwnode, vep);
+ rval = __v4l2_fwnode_endpoint_parse(fwnode, vep);
if (rval < 0)
goto out_err;
rval = fwnode_property_read_u64_array(fwnode, "link-frequencies",
NULL, 0);
if (rval > 0) {
+ unsigned int i;
+
vep->link_frequencies =
kmalloc_array(rval, sizeof(*vep->link_frequencies),
GFP_KERNEL);
@@ -269,8 +325,14 @@ struct v4l2_fwnode_endpoint *v4l2_fwnode_endpoint_alloc_parse(
vep->nr_of_link_frequencies);
if (rval < 0)
goto out_err;
+
+ for (i = 0; i < vep->nr_of_link_frequencies; i++)
+ pr_info("link-frequencies %u value %llu\n", i,
+ vep->link_frequencies[i]);
}
+ pr_debug("===== end V4L2 endpoint properties\n");
+
return vep;
out_err:
--
2.11.0
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