Commit d8c2f094 authored by Dmitry Baryshkov's avatar Dmitry Baryshkov
Browse files

drm/msm/dp: support finding next bridge even for DP interfaces 



It is possible to supply display-connector (bridge) to the DP interface,
add support for parsing it too.

Signed-off-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Tested-by: default avatarKuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: default avatarStephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20220211224006.1797846-4-dmitry.baryshkov@linaro.org


Signed-off-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
parent 9aa92468

drivers/gpu/drm/msm/dp/dp_parser.c

+12 −7
Original line number Diff line number Diff line
@@ -301,17 +301,22 @@ static int dp_parser_parse(struct dp_parser *parser, int connector_type) 
		return rc;



	/*

	 * Currently we support external bridges only for eDP connectors.

	 * External bridges are mandatory for eDP interfaces: one has to

	 * provide at least an eDP panel (which gets wrapped into panel-bridge).

	 *

	 * No external bridges are expected for the DisplayPort connector,

	 * it is physically present in a form of a DP or USB-C connector.

	 * For DisplayPort interfaces external bridges are optional, so

	 * silently ignore an error if one is not present (-ENODEV).

	 */

	if (connector_type == DRM_MODE_CONNECTOR_eDP) {

	rc = dp_parser_find_next_bridge(parser);

		if (rc) {

			DRM_ERROR("DP: failed to find next bridge\n");

	if (rc == -ENODEV) {

		if (connector_type == DRM_MODE_CONNECTOR_eDP) {

			DRM_ERROR("eDP: next bridge is not present\n");

			return rc;

		}

	} else if (rc) {

		if (rc != -EPROBE_DEFER)

			DRM_ERROR("DP: error parsing next bridge: %d\n", rc);

		return rc;

	}



	/* Map the corresponding regulator information according to