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drm/amd/display: use a more appropriate return value in dp_retrieve_lttpr_cap()

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Not all ASICs support LTTPR, however if they don't it doesn't mean that
we have encountered unexpected behaviour. So, use DC_NOT_SUPPORTED
instead of DC_ERROR_UNEXPECTED.

Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Hamza Mahfooz
2023-01-20 12:22:21 -05:00
committed by Alex Deucher
parent a462ef872f
commit 31769ce954
1 changed files with 1 additions and 1 deletions
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drivers/gpu/drm/amd/display/dc/link/link_dp_capability.c
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@@ -1462,7 +1462,7 @@ enum dc_status dp_retrieve_lttpr_cap(struct dc_link *link)
bool vbios_lttpr_interop = link->dc->caps.vbios_lttpr_aware;
if (!vbios_lttpr_interop || !link->dc->caps.extended_aux_timeout_support)
return DC_ERROR_UNEXPECTED;
return DC_NOT_SUPPORTED;
/* By reading LTTPR capability, RX assumes that we will enable
* LTTPR extended aux timeout if LTTPR is present.