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