drm/amd/display: Fix VPG instancing for dcn314 HPO

[Why]
An issue during VPG indexing offset generation causing
to use the incorrect VPG. HW team placed VPG instances
5 at end of list, making it VPG 9 in register headers.

[How]
Correct VPG instance for HPO encoders.

Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Duncan Ma <duncan.ma@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c
index 1f095f0..85f3220 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c
@@ -1254,7 +1254,7 @@ static struct stream_encoder *dcn314_stream_encoder_create(
        int afmt_inst;
 
        /* Mapping of VPG, AFMT, DME register blocks to DIO block instance */
-       if (eng_id <= ENGINE_ID_DIGF) {
+       if (eng_id < ENGINE_ID_DIGF) {
                vpg_inst = eng_id;
                afmt_inst = eng_id;
        } else
@@ -1299,7 +1299,8 @@ static struct hpo_dp_stream_encoder *dcn31_hpo_dp_stream_encoder_create(
         * VPG[8] -> HPO_DP[2]
         * VPG[9] -> HPO_DP[3]
         */
-       vpg_inst = hpo_dp_inst + 6;
+       //Uses offset index 5-8, but actually maps to vpg_inst 6-9
+       vpg_inst = hpo_dp_inst + 5;
 
        /* Mapping of APG register blocks to HPO DP block instance:
         * APG[0] -> HPO_DP[0]