提交 266d783b 编写于 作者: M Mika Kahola 提交者: Jani Nikula
上级 7529d6af
......@@ -513,6 +513,18 @@ int drm_dp_downstream_max_bpc(const u8 dpcd[DP_RECEIVER_CAP_SIZE],
}
EXPORT_SYMBOL(drm_dp_downstream_max_bpc);
/**
* drm_dp_downstream_id() - identify branch device
* @aux: DisplayPort AUX channel
*
* Returns branch device id on success or NULL on failure
*/
int drm_dp_downstream_id(struct drm_dp_aux *aux, char id[6])
{
return drm_dp_dpcd_read(aux, DP_BRANCH_ID, id, 6);
}
EXPORT_SYMBOL(drm_dp_downstream_id);
/*
* I2C-over-AUX implementation
*/
......
......@@ -445,6 +445,7 @@
#define DP_SOURCE_OUI 0x300
#define DP_SINK_OUI 0x400
#define DP_BRANCH_OUI 0x500
#define DP_BRANCH_ID 0x503
#define DP_SET_POWER 0x600
# define DP_SET_POWER_D0 0x1
......@@ -819,6 +820,7 @@ int drm_dp_downstream_max_clock(const u8 dpcd[DP_RECEIVER_CAP_SIZE],
const u8 port_cap[4]);
int drm_dp_downstream_max_bpc(const u8 dpcd[DP_RECEIVER_CAP_SIZE],
const u8 port_cap[4]);
int drm_dp_downstream_id(struct drm_dp_aux *aux, char id[6]);
void drm_dp_aux_init(struct drm_dp_aux *aux);
int drm_dp_aux_register(struct drm_dp_aux *aux);
......
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