diff options
| author | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2022-02-12 01:40:04 +0300 |
|---|---|---|
| committer | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2022-02-19 05:31:36 +0300 |
| commit | d8c2f09412ebc12a71594be66fa7248b04110afa (patch) | |
| tree | f3c325cc7853beb0c89c0a5fb908ae0eeb94538f /drivers/gpu/drm/msm/dp/dp_parser.c | |
| parent | 9aa924688095e55a727f11228d73ce8df01d2a40 (diff) | |
| download | linux-d8c2f09412ebc12a71594be66fa7248b04110afa.tar.xz | |
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: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Tested-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20220211224006.1797846-4-dmitry.baryshkov@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Diffstat (limited to 'drivers/gpu/drm/msm/dp/dp_parser.c')
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_parser.c | 19 |
1 files 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 |