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| author | Jani Nikula <jani.nikula@intel.com> | 2017-05-18 13:10:22 +0200 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2017-05-29 12:36:57 +0200 |
| commit | 118b90f3f18e733c99f0e8b98ea31a815ffc4d14 (patch) | |
| tree | c8a4302f16986bec4878eb1c014265821d5e1997 /include/drm/drm_dp_helper.h | |
| parent | Linux 4.12-rc3 (diff) | |
| download | linux-118b90f3f18e733c99f0e8b98ea31a815ffc4d14.tar.xz linux-118b90f3f18e733c99f0e8b98ea31a815ffc4d14.zip | |
drm/dp: add helper for reading DP sink/branch device desc from DPCD
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/acba54da7d80eafea9e59a893e27e3c31028c0ba.1495105635.git.jani.nikula@intel.com
Diffstat (limited to 'include/drm/drm_dp_helper.h')
| -rw-r--r-- | include/drm/drm_dp_helper.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index c0bd0d7651a9..84502da177a1 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -913,4 +913,23 @@ void drm_dp_aux_unregister(struct drm_dp_aux *aux); int drm_dp_start_crc(struct drm_dp_aux *aux, struct drm_crtc *crtc); int drm_dp_stop_crc(struct drm_dp_aux *aux); +struct drm_dp_dpcd_ident { + u8 oui[3]; + u8 device_id[6]; + u8 hw_rev; + u8 sw_major_rev; + u8 sw_minor_rev; +} __packed; + +/** + * struct drm_dp_desc - DP branch/sink device descriptor + * @ident: DP device identification from DPCD 0x400 (sink) or 0x500 (branch). + */ +struct drm_dp_desc { + struct drm_dp_dpcd_ident ident; +}; + +int drm_dp_read_desc(struct drm_dp_aux *aux, struct drm_dp_desc *desc, + bool is_branch); + #endif /* _DRM_DP_HELPER_H_ */ |