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drm/amd/display: determine dp link encoding format from link settings

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Implement a function that determines link encoding format
based on the link settings passed in.

Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Reviewed-by: George Shen <George.Shen@amd.com>
Acked-by: Stylon Wang <stylon.wang@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Wenjing Liu 2021-05-03 14:51:27 -04:00 committed by Alex Deucher
parent 6cb2ce8e31
commit 55bac4a77a
3 changed files with 13 additions and 0 deletions
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7
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
View File

@ -4852,4 +4852,11 @@ bool is_edp_ilr_optimization_required(struct dc_link *link, struct dc_crtc_timin
return false;
}
enum dp_link_encoding dp_get_link_encoding_format(const struct dc_link_settings *link_settings)
{
if ((link_settings->link_rate >= LINK_RATE_LOW) &&
(link_settings->link_rate <= LINK_RATE_HIGH3))
return DP_8b_10b_ENCODING;
return DP_UNKNOWN_ENCODING;
}

5
drivers/gpu/drm/amd/display/dc/dc_dp_types.h
View File

@ -98,6 +98,11 @@ enum dc_dp_training_pattern {
DP_TRAINING_PATTERN_VIDEOIDLE,
};
enum dp_link_encoding {
DP_UNKNOWN_ENCODING = 0,
DP_8b_10b_ENCODING = 1,
};
struct dc_link_settings {
enum dc_lane_count lane_count;
enum dc_link_rate link_rate;

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

@ -105,4 +105,5 @@ enum link_training_result dp_check_link_loss_status(
struct dc_link *link,
const struct link_training_settings *link_training_setting);
enum dp_link_encoding dp_get_link_encoding_format(const struct dc_link_settings *link_settings);
#endif /* __DC_LINK_DP_H__ */