[igt-dev] [PATCH igt] igt/kms_force_connector_basic: Clear any previous connector override

[Maarten Lankhorst]

Op 26-02-18 om 11:43 schreef Chris Wilson:
> When searching for a VGA connector to use to test overriding the
> connector status, we require the system to have a disconnected VGA
> connector, but if a previous test left an override inplace, that may not
> exist. Before we check whether the connector is attached to real HW,
> first reset the connector status override so that we always get the
> actual HW result.
>
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Marta Lofstedt <marta.lofstedt at intel.com>
> ---
>  tests/kms_force_connector_basic.c | 24 +++++++++++++++++-------
>  1 file changed, 17 insertions(+), 7 deletions(-)
>
> diff --git a/tests/kms_force_connector_basic.c b/tests/kms_force_connector_basic.c
> index d2c804c8..c51b5cdf 100644
> --- a/tests/kms_force_connector_basic.c
> +++ b/tests/kms_force_connector_basic.c
> @@ -86,29 +86,39 @@ int main(int argc, char **argv)
>  				    opt_handler, NULL);
>  
>  	igt_fixture {
> +		unsigned vga_connector_id = 0;
> +
>  		drm_fd = drm_open_driver_master(DRIVER_INTEL);
>  		res = drmModeGetResources(drm_fd);
>  		igt_assert(res);
>  
>  		/* find the vga connector */
>  		for (int i = 0; i < res->count_connectors; i++) {
> -
>  			vga_connector = drmModeGetConnectorCurrent(drm_fd,
>  								   res->connectors[i]);
>  
>  			if (vga_connector->connector_type == DRM_MODE_CONNECTOR_VGA) {
> -				start_n_modes = vga_connector->count_modes;
> -				start_connection = vga_connector->connection;
> -				break;
> +				/* Ensure that no override was left in place */
> +				kmstest_force_connector(drm_fd,
> +							vga_connector,
> +							FORCE_CONNECTOR_UNSPECIFIED);
> +
> +				/* only use the first connector */
> +				if (!vga_connector_id)
> +					vga_connector_id = res->connectors[i];
>  			}
>  
>  			drmModeFreeConnector(vga_connector);
> -
> -			vga_connector = NULL;
>  		}
>  
> -		igt_require(vga_connector);
> +		igt_require(vga_connector_id);
> +
> +		/* Reacquire status after clearing any previous overrides */
> +		vga_connector = drmModeGetConnector(drm_fd, vga_connector_id);
>  		igt_skip_on(vga_connector->connection == DRM_MODE_CONNECTED);
> +
> +		start_n_modes = vga_connector->count_modes;
> +		start_connection = vga_connector->connection;
>  	}
>  
>  	igt_subtest("force-load-detect") {

Looks sane, was just curious whether the workaround would have to be in kernel or userspace, but this looks fine.

Might want to free the vga connector from first round to fix a small leak..

Reviewed-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>