From 1d231e8a2e95cb77c102766951a0447a7695a77b Mon Sep 17 00:00:00 2001 From: Nikola Cornij Date: Wed, 4 Jul 2018 19:05:16 -0400 Subject: [PATCH 4956/5725] drm/amd/display: Add hook for MST root branch info This allows DM to do any necessary updates before MST discovery starts. Signed-off-by: Nikola Cornij Reviewed-by: Nikola Cornij Acked-by: Leo Li Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 5 +++++ drivers/gpu/drm/amd/display/dc/core/dc_link.c | 4 ++++ drivers/gpu/drm/amd/display/dc/dm_helpers.h | 8 ++++++++ 3 files changed, 17 insertions(+) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c index 4188dbd..d1ce925 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c @@ -169,6 +169,11 @@ static void get_payload_table( mutex_unlock(&mst_mgr->payload_lock); } +void dm_helpers_dp_update_branch_info( + struct dc_context *ctx, + const struct dc_link *link) +{} + /* * Writes payload allocation table in immediate downstream device. */ diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c index f058620..a621467 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -529,6 +529,10 @@ static bool detect_dp( if (reason == DETECT_REASON_BOOT) boot = true; + dm_helpers_dp_update_branch_info( + link->ctx, + link); + if (!dm_helpers_dp_mst_start_top_mgr( link->ctx, link, boot)) { diff --git a/drivers/gpu/drm/amd/display/dc/dm_helpers.h b/drivers/gpu/drm/amd/display/dc/dm_helpers.h index 7e6b9f5..5d4527d0 100644 --- a/drivers/gpu/drm/amd/display/dc/dm_helpers.h +++ b/drivers/gpu/drm/amd/display/dc/dm_helpers.h @@ -40,6 +40,14 @@ enum dc_edid_status dm_helpers_parse_edid_caps( const struct dc_edid *edid, struct dc_edid_caps *edid_caps); + +/* + * Update DP branch info + */ +void dm_helpers_dp_update_branch_info( + struct dc_context *ctx, + const struct dc_link *link); + /* * Writes payload allocation table in immediate downstream device. */ -- 2.7.4