diff options
author | Lyude Paul <lyude@redhat.com> | 2020-08-26 14:24:51 -0400 |
---|---|---|
committer | Lyude Paul <lyude@redhat.com> | 2020-08-31 19:10:08 -0400 |
commit | 693c3ec5976eb4b66cbd4f3f1c701a6f0ae1c9b9 (patch) | |
tree | 2accf554bc539eace05e11121fcd1c580c1a43c3 /drivers | |
parent | 409d38139b42f2c3d3e6012a060c498fbb5067fc (diff) | |
download | linux-693c3ec5976eb4b66cbd4f3f1c701a6f0ae1c9b9.tar.bz2 |
drm/i915/dp: Extract drm_dp_read_sink_count_cap()
Since other drivers are also going to need to be aware of the sink count
in order to do proper dongle detection, we might as well steal i915's
DP_SINK_COUNT helpers and move them into DRM helpers so that other
dirvers can use them as well.
Note that this also starts using intel_dp_has_sink_count() in
intel_dp_detect_dpcd(), which is a functional change.
v5:
* Change name from drm_dp_has_sink_count() to
drm_dp_read_sink_count_cap()
Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Sean Paul <sean@poorly.run>
Link: https://patchwork.freedesktop.org/patch/msgid/20200826182456.322681-16-lyude@redhat.com
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/gpu/drm/drm_dp_helper.c | 22 | ||||
-rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp.c | 21 |
2 files changed, 34 insertions, 9 deletions
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index f3643894ad95..65ff21ae0c27 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -726,6 +726,28 @@ void drm_dp_set_subconnector_property(struct drm_connector *connector, } EXPORT_SYMBOL(drm_dp_set_subconnector_property); +/** + * drm_dp_read_sink_count_cap() - Check whether a given connector has a valid sink + * count + * @connector: The DRM connector to check + * @dpcd: A cached copy of the connector's DPCD RX capabilities + * @desc: A cached copy of the connector's DP descriptor + * + * Returns: %True if the (e)DP connector has a valid sink count that should + * be probed, %false otherwise. + */ +bool drm_dp_read_sink_count_cap(struct drm_connector *connector, + const u8 dpcd[DP_RECEIVER_CAP_SIZE], + const struct drm_dp_desc *desc) +{ + /* Some eDP panels don't set a valid value for the sink count */ + return connector->connector_type != DRM_MODE_CONNECTOR_eDP && + dpcd[DP_DPCD_REV] >= DP_DPCD_REV_11 && + dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT && + !drm_dp_has_quirk(desc, 0, DP_DPCD_QUIRK_NO_SINK_COUNT); +} +EXPORT_SYMBOL(drm_dp_read_sink_count_cap); + /* * I2C-over-AUX implementation */ diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 9c4b806af8c7..38318ae935f8 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -4634,6 +4634,16 @@ intel_edp_init_dpcd(struct intel_dp *intel_dp) return true; } +static bool +intel_dp_has_sink_count(struct intel_dp *intel_dp) +{ + if (!intel_dp->attached_connector) + return false; + + return drm_dp_read_sink_count_cap(&intel_dp->attached_connector->base, + intel_dp->dpcd, + &intel_dp->desc); +} static bool intel_dp_get_dpcd(struct intel_dp *intel_dp) @@ -4653,13 +4663,7 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp) intel_dp_set_common_rates(intel_dp); } - /* - * Some eDP panels do not set a valid value for sink count, that is why - * it don't care about read it here and in intel_edp_init_dpcd(). - */ - if (!intel_dp_is_edp(intel_dp) && - !drm_dp_has_quirk(&intel_dp->desc, 0, - DP_DPCD_QUIRK_NO_SINK_COUNT)) { + if (intel_dp_has_sink_count(intel_dp)) { u8 count; ssize_t r; @@ -5939,9 +5943,8 @@ intel_dp_detect_dpcd(struct intel_dp *intel_dp) return connector_status_connected; /* If we're HPD-aware, SINK_COUNT changes dynamically */ - if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && + if (intel_dp_has_sink_count(intel_dp) && intel_dp->downstream_ports[0] & DP_DS_PORT_HPD) { - return intel_dp->sink_count ? connector_status_connected : connector_status_disconnected; } |