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From a068866aa3d9c2c0320a52c350329f490cf280ae Mon Sep 17 00:00:00 2001
From: Wenjing Liu <Wenjing.Liu@amd.com>
Date: Sat, 23 Feb 2019 16:07:45 -0500
Subject: [PATCH 1598/2940] drm/amd/display: add i2c over aux failure handling
[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>
---
drivers/gpu/drm/amd/display/dc/dc_ddc_types.h | 2 ++
drivers/gpu/drm/amd/display/dc/dce/dce_aux.c | 2 ++
2 files changed, 4 insertions(+)
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 05c8c31d8b31..4ef97f65e55d 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_ddc_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_ddc_types.h
@@ -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,
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 c9b881ddd6b6..cdb3042e1ae1 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c
@@ -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;
--
2.17.1
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