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drm/amd/display: Allow constructing DCE8 link encoder without DDC

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When the DDC channel ID is set to CHANNEL_ID_UNKNOWN,
pass NULL to the AUX regs array.

This is necessary to support embedded connectors without DDC.

Fixes: 4562236b3b ("drm/amd/dc: Add dc display driver (v2)")
Link: https://gitlab.freedesktop.org/drm/amd/-/work_items/5192
Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Timur Kristóf 2026-04-28 13:40:43 +02:00 committed by Alex Deucher
parent 38a70e50b2
commit 155baf3038
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/display/dc/resource/dce80/dce80_resource.c
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@ -760,7 +760,8 @@ static struct link_encoder *dce80_link_encoder_create(
enc_init_data,
&link_enc_feature,
&link_enc_regs[link_regs_id],
&link_enc_aux_regs[enc_init_data->channel - 1],
enc_init_data->channel == CHANNEL_ID_UNKNOWN ?
NULL : &link_enc_aux_regs[enc_init_data->channel - 1],
enc_init_data->hpd_source >= ARRAY_SIZE(link_enc_hpd_regs) ?
NULL : &link_enc_hpd_regs[enc_init_data->hpd_source]);
return &enc110->base;