From: Wesley Chalmers <Wesley.Chalmers@xxxxxxx>
[WHY]
DP 2.0 SCR specifies that
"A DPTX shall distinguish I2C_DEFER|AUX_ACK from AUX_DEFER. AUX retries
due to
I2C_DEFER are not counted as part of minimum 7 retires (sic) upon
AUX_DEFER’s"
Signed-off-by: Wesley Chalmers <Wesley.Chalmers@xxxxxxx>
Reviewed-by: Jun Lei <Jun.Lei@xxxxxxx>
Acked-by: Anson Jacob <Anson.Jacob@xxxxxxx>
---
drivers/gpu/drm/amd/display/dc/dce/dce_aux.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
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 49cb4e6d6411..28631714f697 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c
@@ -667,12 +667,13 @@ bool dce_aux_transfer_with_retries(struct ddc_service *ddc,
case AUX_TRANSACTION_REPLY_AUX_DEFER:
/* polling_timeout_period is in us */
defer_time_in_ms += aux110->polling_timeout_period / 1000;
+ ++aux_defer_retries;
/* fall through */
case AUX_TRANSACTION_REPLY_I2C_OVER_AUX_DEFER:
retry_on_defer = true;
fallthrough;
case AUX_TRANSACTION_REPLY_I2C_OVER_AUX_NACK:
- if (++aux_defer_retries >= AUX_MIN_DEFER_RETRIES
+ if (aux_defer_retries >= AUX_MIN_DEFER_RETRIES
&& defer_time_in_ms >= AUX_MAX_DEFER_TIMEOUT_MS) {
goto fail;
} else {
--
2.25.1
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