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| author |   Jude Shih <shenshih@amd.com> | 2021-04-20 10:19:37 +0800 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2021-05-10 18:06:44 -0400 |
| commit | 81927e2808be5adace93c2012d45d6938d3a7aa0 (patch) | |
| tree | 95f90e9a665f319d77ff5700d82870673bb47949 /drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c | |
| parent | drm/amd/display: update DCN to use new surface programming (diff) | |
| download | linux-dev-81927e2808be5adace93c2012d45d6938d3a7aa0.tar.xz linux-dev-81927e2808be5adace93c2012d45d6938d3a7aa0.zip | |
drm/amd/display: Support for DMUB AUX
[WHY]
To process AUX transactions with DMUB using inbox1 and outbox1 mail boxes.
[How]
1) Added inbox1 command DMUB_CMD__DP_AUX_ACCESS to issue AUX commands
to DMUB in dc_process_dmub_aux_transfer_async(). DMUB processes AUX cmd
with DCN and sends reply back in an outbox1 message triggering an
outbox1 interrupt to driver.
2) In existing driver implementation, AUX commands are processed
synchronously by configuring DCN reg. But in DMUB AUX, driver sends an
inbox1 message and waits for a conditional variable (CV) which will be
signaled by outbox1 ISR.
3) DM will retrieve Outbox1 message and send back reply to upper layer
and complete the AUX command
Signed-off-by: Jude Shih <shenshih@amd.com>
Reviewed-by: Hanghong Ma <Hanghong.Ma@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Wayne Lin <Wayne.Lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c index 64414c51312d..3bdd54e6248a 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c @@ -658,7 +658,10 @@ int dc_link_aux_transfer_raw(struct ddc_service *ddc, struct aux_payload *payload, enum aux_return_code_type *operation_result) { - return dce_aux_transfer_raw(ddc, payload, operation_result); + if (dc_enable_dmub_notifications(ddc->ctx->dc)) + return dce_aux_transfer_dmub_raw(ddc, payload, operation_result); + else + return dce_aux_transfer_raw(ddc, payload, operation_result); } /* dc_link_aux_transfer_with_retries() - Attempt to submit an |