Add the helpers for getting the max FRL rate with and without DSC for an HDMI sink.
v2: Fix the subject line and documentation of the helpers (Jani). Split the helper definitions and usage into separate patches. (Jani).
Signed-off-by: Ankit Nautiyal ankit.k.nautiyal@intel.com --- drivers/gpu/drm/drm_edid.c | 38 ++++++++++++++++++++++++++++++++++++++ include/drm/drm_edid.h | 2 ++ 2 files changed, 40 insertions(+)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index eb61a1a92dc0..c209fd6b24a2 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -6176,3 +6176,41 @@ void drm_update_tile_info(struct drm_connector *connector, connector->tile_group = NULL; } } + +/** + * drm_hdmi_sink_max_frl - get the max frl rate, if supported + * @connector - connector with HDMI sink + * + * RETURNS: + * max frl rate supported by the HDMI sink, 0 if FRL not supported + */ +int drm_hdmi_sink_max_frl(struct drm_connector *connector) +{ + int max_lanes = connector->display_info.hdmi.max_lanes; + int rate_per_lane = connector->display_info.hdmi.max_frl_rate_per_lane; + + return max_lanes * rate_per_lane; +} +EXPORT_SYMBOL(drm_hdmi_sink_max_frl); + +/** + * drm_hdmi_sink_dsc_max_frl - get the max frl rate from HDMI sink with + * DSC1.2 compression. + * @connector - connector with HDMI sink + * + * RETURNS: + * max frl rate supported by the HDMI sink with DSC1.2, 0 if FRL not supported + */ +int drm_hdmi_sink_dsc_max_frl(struct drm_connector *connector) +{ + int max_dsc_lanes, dsc_rate_per_lane; + + if (!connector->display_info.hdmi.dsc_cap.v_1p2) + return 0; + + max_dsc_lanes = connector->display_info.hdmi.dsc_cap.max_lanes; + dsc_rate_per_lane = connector->display_info.hdmi.dsc_cap.max_frl_rate_per_lane; + + return max_dsc_lanes * dsc_rate_per_lane; +} +EXPORT_SYMBOL(drm_hdmi_sink_dsc_max_frl); diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h index 18f6c700f6d0..5003e1254c44 100644 --- a/include/drm/drm_edid.h +++ b/include/drm/drm_edid.h @@ -592,6 +592,8 @@ drm_display_mode_from_cea_vic(struct drm_device *dev, u8 video_code); const u8 *drm_find_edid_extension(const struct edid *edid, int ext_id, int *ext_index); +int drm_hdmi_sink_max_frl(struct drm_connector *connector); +int drm_hdmi_sink_dsc_max_frl(struct drm_connector *connector);
#endif /* __DRM_EDID_H__ */