diff options
| author | Thierry Reding <treding@nvidia.com> | 2013-12-09 11:47:55 +0100 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2014-01-10 10:15:22 +0100 |
| commit | 8797d68b9faa2300144ff4374961f5fc759f28e4 (patch) | |
| tree | 7fe20d3c249e96f3f7f3b3c845f615b160a8fd1f /include | |
| parent | 962b70e2334340dbe6718692f6953e8910dbb4ad (diff) | |
drm/dp: Add DisplayPort link helpers
Add a helper to probe a DP link (reading out the maximum rate, link
count and capabilities) as well as configuring it accordingly.
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
Changes in v3:
- remove duplicate kerneldoc
Diffstat (limited to 'include')
| -rw-r--r-- | include/drm/drm_dp_helper.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index f6c61f3178f8..05055c05db2b 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -291,6 +291,7 @@ #define DP_SET_POWER 0x600 # define DP_SET_POWER_D0 0x1 # define DP_SET_POWER_D3 0x2 +# define DP_SET_POWER_MASK 0x3 #define DP_PSR_ERROR_STATUS 0x2006 /* XXX 1.2? */ # define DP_PSR_LINK_CRC_ERROR (1 << 0) @@ -468,4 +469,18 @@ static inline ssize_t drm_dp_dpcd_writeb(struct drm_dp_aux *aux, u8 value, int drm_dp_dpcd_read_link_status(struct drm_dp_aux *aux, u8 status[DP_LINK_STATUS_SIZE]); +/* + * DisplayPort link + */ +#define DP_LINK_CAP_ENHANCED_FRAMING (1 << 0) + +struct drm_dp_link { + unsigned int rate; + unsigned int num_lanes; + unsigned long capabilities; +}; + +int drm_dp_link_probe(struct drm_dp_aux *aux, struct drm_dp_link *link); +int drm_dp_link_power_up(struct drm_dp_aux *aux, struct drm_dp_link *link); + #endif /* _DRM_DP_HELPER_H_ */ |