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| author | Fangzhi Zuo <Jerry.Zuo@amd.com> | 2021-10-25 18:38:23 -0400 |
|---|---|---|
| committer | Lyude Paul <lyude@redhat.com> | 2021-10-25 21:21:08 -0400 |
| commit | d740e0bf8ed4c14ac6a616e2b31626bdcf417135 (patch) | |
| tree | 80aaedd030438dcabd0f22891910df884bdf3eb3 /drivers/gpu/drm/amd/display/dc/dc_link.h | |
| parent | d6c6a76f80a1c91dceacef3630a7465ece630615 (diff) | |
| download | linux-d740e0bf8ed4c14ac6a616e2b31626bdcf417135.tar.bz2 | |
drm/amd/display: Add DP 2.0 MST DC Support
[Why]
configure/call DC interface for DP2 mst support. This is needed to make DP2
mst work.
[How]
- add encoding type, logging, mst update/reduce payload functions
Use the link encoding to determine the DP type (1.4 or 2.0) and add a
flag to dc_stream_update to determine whether to increase/reduce
payloads.
v2:
* add DP_UNKNOWN_ENCODING handling
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Reviewed-by: "Lin, Wayne" <Wayne.Lin@amd.com>
Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211025223825.301703-4-lyude@redhat.com
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dc_link.h')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc_link.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h index 69b008bafbbc..d9fb43d99dc0 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_link.h +++ b/drivers/gpu/drm/amd/display/dc/dc_link.h @@ -296,6 +296,10 @@ enum dc_detect_reason { bool dc_link_detect(struct dc_link *dc_link, enum dc_detect_reason reason); bool dc_link_get_hpd_state(struct dc_link *dc_link); enum dc_status dc_link_allocate_mst_payload(struct pipe_ctx *pipe_ctx); +#if defined(CONFIG_DRM_AMD_DC_DCN) +enum dc_status dc_link_reduce_mst_payload(struct pipe_ctx *pipe_ctx, uint32_t req_pbn); +enum dc_status dc_link_increase_mst_payload(struct pipe_ctx *pipe_ctx, uint32_t req_pbn); +#endif /* Notify DC about DP RX Interrupt (aka Short Pulse Interrupt). * Return: @@ -425,4 +429,7 @@ uint32_t dc_bandwidth_in_kbps_from_timing( bool dc_link_is_fec_supported(const struct dc_link *link); bool dc_link_should_enable_fec(const struct dc_link *link); +#if defined(CONFIG_DRM_AMD_DC_DCN) +enum dp_link_encoding dc_link_dp_mst_decide_link_encoding_format(const struct dc_link *link); +#endif #endif /* DC_LINK_H_ */ |