[PATCH 24/39] drm/amd/display: Enable aux transfer path via dmub for dp tunneling

[Rodrigo Siqueira]

From: Meenakshikumar Somasundaram <meenakshikumar.somasunda...@amd.com>

[Why]
Aux transfer retries path does not support dp tunneling.

[How]
Based on ddc pin check, aux will be issued in legacy path or dmub.

Signed-off-by: Meenakshikumar Somasundaram <meenakshikumar.somasunda...@amd.com>
Reviewed-by: Eric Yang <eric.y...@amd.com>
Signed-off-by: Rodrigo Siqueira <rodrigo.sique...@amd.com>
---
 drivers/gpu/drm/amd/display/dc/dce/dce_aux.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c 
b/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c
index b8996d285f00..bb4ac5042c80 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c
@@ -735,7 +735,15 @@ bool dce_aux_transfer_with_retries(struct ddc_service *ddc,
                                        (unsigned int) payload->mot);
                if (payload->write)
                        dce_aux_log_payload("  write", payload->data, 
payload->length, 16);
-               ret = dce_aux_transfer_raw(ddc, payload, &operation_result);
+
+               /* Check whether aux to be processed via dmub or dcn directly */
+               if (ddc->ctx->dc->debug.enable_dmub_aux_for_legacy_ddc
+                       || ddc->ddc_pin == NULL) {
+                       ret = dce_aux_transfer_dmub_raw(ddc, payload, 
&operation_result);
+               } else {
+                       ret = dce_aux_transfer_raw(ddc, payload, 
&operation_result);
+               }
+
                DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_INFORMATION,
                                        LOG_FLAG_I2cAux_DceAux,
                                        "dce_aux_transfer_with_retries: 
link_index=%u: END: retry %d of %d: address=0x%04x length=%u write=%d mot=%d: 
ret=%d operation_result=%d payload->reply=%u",
-- 
2.43.0