On 2/11/2022 2:40 PM, Dmitry Baryshkov wrote:
It is possible to supply display-connector (bridge) to the DP interface, add support for parsing it too. Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
Tested-by: Kuogee Hsieh <quic_khs...@quicinc.com>
--- drivers/gpu/drm/msm/dp/dp_parser.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c index 901d7967370f..1056b8d5755b 100644 --- a/drivers/gpu/drm/msm/dp/dp_parser.c +++ b/drivers/gpu/drm/msm/dp/dp_parser.c @@ -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"); + rc = dp_parser_find_next_bridge(parser); + 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
