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From 028bb6e29c093f31f569f7e129229312f25b7e7d Mon Sep 17 00:00:00 2001
From: Anthony Koo <Anthony.Koo@amd.com>
Date: Wed, 2 Oct 2019 12:22:29 -0400
Subject: [PATCH 4252/4736] drm/amd/display: Proper return of result when aux
engine acquire fails
[Why]
When aux engine acquire fails, we missed populating the operation_result
that describes the failure reason.
[How]
Set operation_result to new type:
AUX_CHANNEL_OPERATION_FAILED_ENGINE_ACQUIRE
in the case aux engine acquire has failed.
Signed-off-by: Anthony Koo <Anthony.Koo@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 1 +
drivers/gpu/drm/amd/display/dc/dc_ddc_types.h | 3 ++-
drivers/gpu/drm/amd/display/dc/dce/dce_aux.c | 5 ++++-
3 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 430155730c29..c765fcbd1386 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -113,6 +113,7 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux,
result = -EIO;
break;
case AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY:
+ case AUX_CHANNEL_OPERATION_FAILED_ENGINE_ACQUIRE:
result = -EBUSY;
break;
case AUX_CHANNEL_OPERATION_FAILED_TIMEOUT:
diff --git a/drivers/gpu/drm/amd/display/dc/dc_ddc_types.h b/drivers/gpu/drm/amd/display/dc/dc_ddc_types.h
index 4ef97f65e55d..4f8f576d5fcf 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_ddc_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_ddc_types.h
@@ -49,7 +49,8 @@ enum aux_channel_operation_result {
AUX_CHANNEL_OPERATION_FAILED_REASON_UNKNOWN,
AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY,
AUX_CHANNEL_OPERATION_FAILED_TIMEOUT,
- AUX_CHANNEL_OPERATION_FAILED_HPD_DISCON
+ AUX_CHANNEL_OPERATION_FAILED_HPD_DISCON,
+ AUX_CHANNEL_OPERATION_FAILED_ENGINE_ACQUIRE
};
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 a68edd0c2172..3c3830f7908f 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c
@@ -535,8 +535,10 @@ int dce_aux_transfer_raw(struct ddc_service *ddc,
memset(&aux_rep, 0, sizeof(aux_rep));
aux_engine = ddc->ctx->dc->res_pool->engines[ddc_pin->pin_data->en];
- if (!acquire(aux_engine, ddc_pin))
+ if (!acquire(aux_engine, ddc_pin)) {
+ *operation_result = AUX_CHANNEL_OPERATION_FAILED_ENGINE_ACQUIRE;
return -1;
+ }
if (payload->i2c_over_aux)
aux_req.type = AUX_TRANSACTION_TYPE_I2C;
@@ -660,6 +662,7 @@ bool dce_aux_transfer_with_retries(struct ddc_service *ddc,
break;
case AUX_CHANNEL_OPERATION_FAILED_HPD_DISCON:
+ case AUX_CHANNEL_OPERATION_FAILED_ENGINE_ACQUIRE:
case AUX_CHANNEL_OPERATION_FAILED_REASON_UNKNOWN:
default:
goto fail;
--
2.17.1
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