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drm/amd/display: add way to determine if link is active

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[Why]
Need to understand whether link is active aside from stream state.
This could be used to check what links are enabled by GOP.

[How]
Store link_active state in link status and initialize it by checking
if the DIG is enabled.
Keep it updated on every link enable and disable

Signed-off-by: Anthony Koo <Anthony.Koo@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Anthony Koo 2019-01-20 01:32:55 -05:00 committed by Alex Deucher
parent a122b62d8a
commit ff582b6146
3 changed files with 10 additions and 0 deletions
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4
drivers/gpu/drm/amd/display/dc/core/dc_link.c
View File

@ -2612,6 +2612,8 @@ void core_link_enable_stream(
}
}
stream->link->link_status.link_active = true;
core_dc->hwss.enable_audio_stream(pipe_ctx);
/* turn off otg test pattern if enable */
@ -2646,6 +2648,8 @@ void core_link_disable_stream(struct pipe_ctx *pipe_ctx, int option)
core_dc->hwss.disable_stream(pipe_ctx, option);
disable_link(pipe_ctx->stream->link, pipe_ctx->stream->signal);
pipe_ctx->stream->link->link_status.link_active = false;
}
void core_link_set_avmute(struct pipe_ctx *pipe_ctx, bool enable)

1
drivers/gpu/drm/amd/display/dc/dc_link.h
View File

@ -30,6 +30,7 @@
#include "grph_object_defs.h"
struct dc_link_status {
bool link_active;
struct dpcd_caps *dpcd_caps;
};

5
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
View File

@ -1027,6 +1027,11 @@ static void dcn10_init_hw(struct dc *dc)
dc->hwss.edp_power_control(link, true);
link->link_enc->funcs->hw_init(link->link_enc);
/* Check for enabled DIG to identify enabled display */
if (link->link_enc->funcs->is_dig_enabled &&
link->link_enc->funcs->is_dig_enabled(link->link_enc))
link->link_status.link_active = true;
}
}