| Message ID | 1465219753-3737-4-git-send-email-mika.kahola@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Mon, Jun 06, 2016 at 04:29:05PM +0300, Mika Kahola wrote: > Helper routine to read out DisplayPort branch device type. The spec > defines these type as following > > 0 DisplayPort > 1 Analog VGA > 2 DVI > 3 HDMI > 4 Others without EDID support > 5 DP++ > 6 Wireless > 7 Reserved > > Signed-off-by: Mika Kahola <mika.kahola@intel.com> > --- > drivers/gpu/drm/drm_dp_helper.c | 14 ++++++++++++++ > include/drm/drm_dp_helper.h | 1 + > 2 files changed, 15 insertions(+) > > diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c > index c4149fd..7d3b245 100644 > --- a/drivers/gpu/drm/drm_dp_helper.c > +++ b/drivers/gpu/drm/drm_dp_helper.c > @@ -465,6 +465,20 @@ int drm_dp_downstream_port_cap(struct drm_dp_aux *aux, > } > EXPORT_SYMBOL(drm_dp_downstream_port_cap); > > +/** > + * drm_dp_downstream_type() - extract downstream port type > + * @dpcd: DisplayPort configuration data > + * @port_cap: port capabilities > + * > + * Returns type in success or negative error code on failure > + */ > +int drm_dp_downstream_type(const u8 dpcd[DP_RECEIVER_CAP_SIZE], > + const u8 port_cap[4]) > +{ > + return port_cap[0] & DP_DS_PORT_TYPE_MASK; > +} > +EXPORT_SYMBOL(drm_dp_downstream_type); Seems rather pointless to me. > + > /* > * I2C-over-AUX implementation > */ > diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h > index db8d3d47..f290829 100644 > --- a/include/drm/drm_dp_helper.h > +++ b/include/drm/drm_dp_helper.h > @@ -809,6 +809,7 @@ int drm_dp_link_configure(struct drm_dp_aux *aux, struct drm_dp_link *link); > int drm_dp_downstream_port_cap(struct drm_dp_aux *aux, > const u8 dpcd[DP_RECEIVER_CAP_SIZE], > u8 port_cap[4]); > +int drm_dp_downstream_type(const u8 dpcd[DP_RECEIVER_CAP_SIZE], const u8 port_cap[4]); > > int drm_dp_aux_register(struct drm_dp_aux *aux); > void drm_dp_aux_unregister(struct drm_dp_aux *aux); > -- > 1.9.1
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index c4149fd..7d3b245 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -465,6 +465,20 @@ int drm_dp_downstream_port_cap(struct drm_dp_aux *aux, } EXPORT_SYMBOL(drm_dp_downstream_port_cap); +/** + * drm_dp_downstream_type() - extract downstream port type + * @dpcd: DisplayPort configuration data + * @port_cap: port capabilities + * + * Returns type in success or negative error code on failure + */ +int drm_dp_downstream_type(const u8 dpcd[DP_RECEIVER_CAP_SIZE], + const u8 port_cap[4]) +{ + return port_cap[0] & DP_DS_PORT_TYPE_MASK; +} +EXPORT_SYMBOL(drm_dp_downstream_type); + /* * I2C-over-AUX implementation */ diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index db8d3d47..f290829 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -809,6 +809,7 @@ int drm_dp_link_configure(struct drm_dp_aux *aux, struct drm_dp_link *link); int drm_dp_downstream_port_cap(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE], u8 port_cap[4]); +int drm_dp_downstream_type(const u8 dpcd[DP_RECEIVER_CAP_SIZE], const u8 port_cap[4]); int drm_dp_aux_register(struct drm_dp_aux *aux); void drm_dp_aux_unregister(struct drm_dp_aux *aux);
Helper routine to read out DisplayPort branch device type. The spec defines these type as following 0 DisplayPort 1 Analog VGA 2 DVI 3 HDMI 4 Others without EDID support 5 DP++ 6 Wireless 7 Reserved Signed-off-by: Mika Kahola <mika.kahola@intel.com> --- drivers/gpu/drm/drm_dp_helper.c | 14 ++++++++++++++ include/drm/drm_dp_helper.h | 1 + 2 files changed, 15 insertions(+)