The driver doesn't set an initial video format until s_input is called: $ v4l2-ctl -d /dev/v4l-touch0 --get-input Video input : 0 (Normalized 16-Bit Image: ok) $ v4l2-ctl -d /dev/v4l-touch0 --get-fmt-video Width/Height : 0/0 Pixel Format : '' [...] $ v4l2-ctl -d /dev/v4l-touch0 --set-input 0 Video input set to 0 (Normalized 16-Bit Image: Touch, ok) $ v4l2-ctl -d /dev/v4l-touch0 --get-fmt-video Width/Height : 71/40 Pixel Format : 'TD16' [...] To fix this, initialize the video format to input 0 during probe. Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx> --- drivers/input/rmi4/rmi_f54.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/input/rmi4/rmi_f54.c b/drivers/input/rmi4/rmi_f54.c index a6f515bcab22..9ccf7ee0fc67 100644 --- a/drivers/input/rmi4/rmi_f54.c +++ b/drivers/input/rmi4/rmi_f54.c @@ -692,6 +692,7 @@ static int rmi_f54_probe(struct rmi_function *fn) return -ENOMEM; rmi_f54_create_input_map(f54); + rmi_f54_set_input(f54, 0); /* register video device */ strlcpy(f54->v4l2.name, F54_NAME, sizeof(f54->v4l2.name)); -- 2.19.0
