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drm/amd/display: add i2c over aux failure handling

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[why]
We will not retry when EDID read failure using i2c over aux

[how]
treat i2c over aux failure the same as defer

Signed-off-by: Wenjing Liu <Wenjing.Liu@amd.com>
Reviewed-by: David Francis <David.Francis@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Wenjing Liu 2019-02-23 16:07:45 -05:00 committed by Alex Deucher
parent 33d7598d70
commit 0dcdcc8982
2 changed files with 4 additions and 0 deletions
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2
drivers/gpu/drm/amd/display/dc/dc_ddc_types.h
View file

@ -68,6 +68,8 @@ enum aux_transaction_reply {
AUX_TRANSACTION_REPLY_AUX_ACK = 0x00,
AUX_TRANSACTION_REPLY_AUX_NACK = 0x01,
AUX_TRANSACTION_REPLY_AUX_DEFER = 0x02,
AUX_TRANSACTION_REPLY_I2C_OVER_AUX_NACK = 0x04,
AUX_TRANSACTION_REPLY_I2C_OVER_AUX_DEFER = 0x08,
AUX_TRANSACTION_REPLY_I2C_ACK = 0x00,
AUX_TRANSACTION_REPLY_I2C_NACK = 0x10,

2
drivers/gpu/drm/amd/display/dc/dce/dce_aux.c
View file

@ -528,6 +528,8 @@ bool dce_aux_transfer_with_retries(struct ddc_service *ddc,
break;
case AUX_TRANSACTION_REPLY_AUX_DEFER:
case AUX_TRANSACTION_REPLY_I2C_OVER_AUX_NACK:
case AUX_TRANSACTION_REPLY_I2C_OVER_AUX_DEFER:
if (++aux_defer_retries >= AUX_MAX_DEFER_RETRIES)
goto fail;
break;