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Subject[PATCH v3 10/10] media: i2c: imx290: set bus_type before calling v4l2_fwnode_endpoint_alloc_parse()
Date
The bus_type field of v4l2_fwnode_endpoint structure passed as the argument
to v4l2_fwnode_endpoint_alloc_parse() function must be initiaized.
Set it to V4L2_MBUS_CSI2_DPHY, and check for -ENXIO which is returned
when the requested media bus type doesn't match the fwnode.

Also remove v4l2_fwnode_endpoint field from struct imx290 as it is only
needed in the probe function: use the local variable for this purpose.

Signed-off-by: Andrey Konovalov <andrey.konovalov@linaro.org>
---
drivers/media/i2c/imx290.c | 27 +++++++++++++--------------
1 file changed, 13 insertions(+), 14 deletions(-)

diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c
index ee5c95cf64f3..05a3d897614e 100644
--- a/drivers/media/i2c/imx290.c
+++ b/drivers/media/i2c/imx290.c
@@ -74,7 +74,6 @@ struct imx290 {
u8 bpp;

struct v4l2_subdev sd;
- struct v4l2_fwnode_endpoint ep;
struct media_pad pad;
struct v4l2_mbus_framefmt current_format;
const struct imx290_mode *current_mode;
@@ -887,6 +886,10 @@ static int imx290_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct fwnode_handle *endpoint;
+ /* Only CSI2 is supported for now: */
+ struct v4l2_fwnode_endpoint ep = {
+ .bus_type = V4L2_MBUS_CSI2_DPHY
+ };
struct imx290 *imx290;
u32 xclk_freq;
int ret;
@@ -908,15 +911,18 @@ static int imx290_probe(struct i2c_client *client)
return -EINVAL;
}

- ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &imx290->ep);
+ ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &ep);
fwnode_handle_put(endpoint);
- if (ret) {
+ if (ret == -ENXIO) {
+ dev_err(dev, "Unsupported bus type, should be CSI2\n");
+ goto free_err;
+ } else if (ret) {
dev_err(dev, "Parsing endpoint node failed\n");
goto free_err;
}

/* Get number of data lanes */
- imx290->nlanes = imx290->ep.bus.mipi_csi2.num_data_lanes;
+ imx290->nlanes = ep.bus.mipi_csi2.num_data_lanes;
if (imx290->nlanes != 2 && imx290->nlanes != 4) {
dev_err(dev, "Invalid data lanes: %d\n", imx290->nlanes);
ret = -EINVAL;
@@ -925,19 +931,12 @@ static int imx290_probe(struct i2c_client *client)

dev_dbg(dev, "Using %u data lanes\n", imx290->nlanes);

- if (!imx290->ep.nr_of_link_frequencies) {
+ if (!ep.nr_of_link_frequencies) {
dev_err(dev, "link-frequency property not found in DT\n");
ret = -EINVAL;
goto free_err;
}

- /* Only CSI2 is supported for now */
- if (imx290->ep.bus_type != V4L2_MBUS_CSI2_DPHY) {
- dev_err(dev, "Unsupported bus type, should be CSI2\n");
- ret = -EINVAL;
- goto free_err;
- }
-
/* get system clock (xclk) */
imx290->xclk = devm_clk_get(dev, "xclk");
if (IS_ERR(imx290->xclk)) {
@@ -1063,7 +1062,7 @@ static int imx290_probe(struct i2c_client *client)
pm_runtime_enable(dev);
pm_runtime_idle(dev);

- v4l2_fwnode_endpoint_free(&imx290->ep);
+ v4l2_fwnode_endpoint_free(&ep);

return 0;

@@ -1073,7 +1072,7 @@ static int imx290_probe(struct i2c_client *client)
v4l2_ctrl_handler_free(&imx290->ctrls);
mutex_destroy(&imx290->lock);
free_err:
- v4l2_fwnode_endpoint_free(&imx290->ep);
+ v4l2_fwnode_endpoint_free(&ep);

return ret;
}
--
2.17.1
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