| Message ID | 20200811200457.134743-16-lyude@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/dp, i915, nouveau: Cleanup nouveau HPD and add DP features from i915 | expand |
On Tue, Aug 11, 2020 at 04:04:52PM -0400, Lyude Paul wrote: > 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. > Reviewed-by: Sean Paul <sean@poorly.run> > Signed-off-by: Lyude Paul <lyude@redhat.com> > --- > drivers/gpu/drm/drm_dp_helper.c | 22 ++++++++++++++++++++++ > drivers/gpu/drm/i915/display/intel_dp.c | 21 ++++++++++++--------- > include/drm/drm_dp_helper.h | 8 +++++++- > 3 files changed, 41 insertions(+), 10 deletions(-) > > diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c > index 9703b33599c3b..05bb47e589731 100644 > --- a/drivers/gpu/drm/drm_dp_helper.c > +++ b/drivers/gpu/drm/drm_dp_helper.c > @@ -700,6 +700,28 @@ void drm_dp_set_subconnector_property(struct drm_connector *connector, > } > EXPORT_SYMBOL(drm_dp_set_subconnector_property); > > +/** > + * drm_dp_has_sink_count() - 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_has_sink_count(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_has_sink_count); > + > /* > * 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 984e49194ca31..35a4779a442e2 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_has_sink_count(&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; > } > diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h > index 1349f16564ace..a1413a531eaf4 100644 > --- a/include/drm/drm_dp_helper.h > +++ b/include/drm/drm_dp_helper.h > @@ -1631,6 +1631,11 @@ void drm_dp_set_subconnector_property(struct drm_connector *connector, > const u8 *dpcd, > const u8 port_cap[4]); > > +struct drm_dp_desc; > +bool drm_dp_has_sink_count(struct drm_connector *connector, > + const u8 dpcd[DP_RECEIVER_CAP_SIZE], > + const struct drm_dp_desc *desc); > + > void drm_dp_remote_aux_init(struct drm_dp_aux *aux); > void drm_dp_aux_init(struct drm_dp_aux *aux); > int drm_dp_aux_register(struct drm_dp_aux *aux); > @@ -1689,7 +1694,8 @@ enum drm_dp_quirk { > * @DP_DPCD_QUIRK_NO_SINK_COUNT: > * > * The device does not set SINK_COUNT to a non-zero value. > - * The driver should ignore SINK_COUNT during detection. > + * The driver should ignore SINK_COUNT during detection. Note that > + * drm_dp_has_sink_count() automatically checks for this quirk. > */ > DP_DPCD_QUIRK_NO_SINK_COUNT, > /** > -- > 2.26.2 > > _______________________________________________ > dri-devel mailing list > dri-devel@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/dri-devel
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index 9703b33599c3b..05bb47e589731 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -700,6 +700,28 @@ void drm_dp_set_subconnector_property(struct drm_connector *connector, } EXPORT_SYMBOL(drm_dp_set_subconnector_property); +/** + * drm_dp_has_sink_count() - 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_has_sink_count(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_has_sink_count); + /* * 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 984e49194ca31..35a4779a442e2 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_has_sink_count(&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; } diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index 1349f16564ace..a1413a531eaf4 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -1631,6 +1631,11 @@ void drm_dp_set_subconnector_property(struct drm_connector *connector, const u8 *dpcd, const u8 port_cap[4]); +struct drm_dp_desc; +bool drm_dp_has_sink_count(struct drm_connector *connector, + const u8 dpcd[DP_RECEIVER_CAP_SIZE], + const struct drm_dp_desc *desc); + void drm_dp_remote_aux_init(struct drm_dp_aux *aux); void drm_dp_aux_init(struct drm_dp_aux *aux); int drm_dp_aux_register(struct drm_dp_aux *aux); @@ -1689,7 +1694,8 @@ enum drm_dp_quirk { * @DP_DPCD_QUIRK_NO_SINK_COUNT: * * The device does not set SINK_COUNT to a non-zero value. - * The driver should ignore SINK_COUNT during detection. + * The driver should ignore SINK_COUNT during detection. Note that + * drm_dp_has_sink_count() automatically checks for this quirk. */ DP_DPCD_QUIRK_NO_SINK_COUNT, /**
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. Signed-off-by: Lyude Paul <lyude@redhat.com> --- drivers/gpu/drm/drm_dp_helper.c | 22 ++++++++++++++++++++++ drivers/gpu/drm/i915/display/intel_dp.c | 21 ++++++++++++--------- include/drm/drm_dp_helper.h | 8 +++++++- 3 files changed, 41 insertions(+), 10 deletions(-)