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From df707b2fb3fdcd2808df16760862d223881fa562 Mon Sep 17 00:00:00 2001
From: Xiaodong Yan <Xiaodong.Yan@amd.com>
Date: Fri, 30 Aug 2019 17:07:01 +0800
Subject: [PATCH 4075/4256] drm/amd/display: make aux defer delay and aux sw
start delay seperate
[why]
1. defer delay and sw start delay has been mixed up, defer delay was
programmed to AUX_SW_CONTROL:AUX_SW_START_DELAY.
2. There's no delay for defer
[how]
1. Set aux sw start to 0
2. Add delay for defer scenario
Signed-off-by: Xiaodong Yan <Xiaodong.Yan@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
---
drivers/gpu/drm/amd/display/dc/dce/dce_aux.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
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 79a16942ce98..16960ef29132 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c
@@ -472,7 +472,7 @@ int dce_aux_transfer_raw(struct ddc_service *ddc,
aux_req.action = i2caux_action_from_payload(payload);
aux_req.address = payload->address;
- aux_req.delay = payload->defer_delay * 10;
+ aux_req.delay = 0;
aux_req.length = payload->length;
aux_req.data = payload->data;
@@ -541,8 +541,15 @@ bool dce_aux_transfer_with_retries(struct ddc_service *ddc,
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)
+ if (++aux_defer_retries >= AUX_MAX_DEFER_RETRIES) {
goto fail;
+ } else {
+ if ((*payload->reply == AUX_TRANSACTION_REPLY_AUX_DEFER) ||
+ (*payload->reply == AUX_TRANSACTION_REPLY_I2C_OVER_AUX_DEFER)) {
+ if (payload->defer_delay > 0)
+ msleep(payload->defer_delay);
+ }
+ }
break;
case AUX_TRANSACTION_REPLY_I2C_DEFER:
--
2.17.1
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