Commit 0dcdcc89 authored by Wenjing Liu's avatar Wenjing Liu Committed by Alex Deucher
Browse files

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: default avatarWenjing Liu <Wenjing.Liu@amd.com>
Reviewed-by: default avatarDavid Francis <David.Francis@amd.com>
Acked-by: default avatarLeo Li <sunpeng.li@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 33d7598d

drivers/gpu/drm/amd/display/dc/dc_ddc_types.h

+2 −0
Original line number Diff line number Diff line
@@ -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,

drivers/gpu/drm/amd/display/dc/dce/dce_aux.c

+2 −0
Original line number Diff line number Diff line
@@ -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;

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