drm/amd/display: move public dc link function implementation to dc_link_exports

[why]
Link is a subcomponent in dc. DM should be aware of dc link structure
as one of the abstracted objects maintained by dc. However it should
have no idea of the existence of a link component in dc dedicated to
maintain the states of dc link structure. As such we are moving link interfaces
out of dc_link.h and directly added to dc.h. We are grandually fading out
the explicit inclusion of dc_link header and eventually delete it.

On dc side, since link is a subcomponent behind dc interfaces, it is not
a good idea to implement dc interfaces in each individual subcomponent
of link which is already a subcomponent of dc. So we are decoupling it
by implementing a dc_link_exports in dc. This file will be a thin
translation layer that breaks the dependency so link is able to make
interface changes without breaking DM.

Reviewed-by: Jun Lei <[email protected]>
Acked-by: Qingqing Zhuo <[email protected]>
Signed-off-by: Wenjing Liu <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/inc/link.h b/drivers/gpu/drm/amd/display/dc/inc/link.h
index 5e8eb367eede..e70fa0059223 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/link.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/link.h
@@ -136,4 +136,22 @@ enum dc_status link_validate_mode_timing(
 		const struct dc_stream_state *stream,
 		struct dc_link *link,
 		const struct dc_crtc_timing *timing);
+bool link_detect(struct dc_link *link, enum dc_detect_reason reason);
+bool link_detect_connection_type(struct dc_link *link,
+		enum dc_connection_type *type);
+const struct dc_link_status *link_get_status(const struct dc_link *link);
+#ifdef CONFIG_DRM_AMD_DC_HDCP
+/* return true if the connected receiver supports the hdcp version */
+bool link_is_hdcp14(struct dc_link *link, enum signal_type signal);
+bool link_is_hdcp22(struct dc_link *link, enum signal_type signal);
+#endif
+void link_clear_dprx_states(struct dc_link *link);
+bool link_reset_cur_dp_mst_topology(struct dc_link *link);
+uint32_t dp_link_bandwidth_kbps(
+	const struct dc_link *link,
+	const struct dc_link_settings *link_settings);
+uint32_t link_timing_bandwidth_kbps(const struct dc_crtc_timing *timing);
+void link_get_cur_res_map(const struct dc *dc, uint32_t *map);
+void link_restore_res_map(const struct dc *dc, uint32_t *map);
+
 #endif /* __DC_LINK_HPD_H__ */