From 4b7a90f83a30b4208d9f24ca7e28a5678ef190df Mon Sep 17 00:00:00 2001
From: Leo Ma <hanghong.ma@amd.com>
Date: Wed, 23 Mar 2022 12:00:53 -0400
Subject: drm/amd/display: Remove ddc write and read size checking
Git-commit: e953cd08d78256764721e459ce11f9d41e8934f9
Patch-mainline: v5.19-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
[Why]
Customer found I2C over AUX using ADL_Display_DDCBlockAccess_Get
will fail when sending more than 256 bytes of data;
[How]
Remove the write and read size checking to allow sending data more
than 256 bytes;
Reviewed-by: Martin Leung <Martin.Leung@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Leo Ma <hanghong.ma@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c
index 1d4863763df9..2b09310965bc 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c
@@ -543,15 +543,9 @@ bool dal_ddc_service_query_ddc_data(
uint32_t payloads_num = write_payloads + read_payloads;
-
- if (write_size > EDID_SEGMENT_SIZE || read_size > EDID_SEGMENT_SIZE)
- return false;
-
if (!payloads_num)
return false;
- /*TODO: len of payload data for i2c and aux is uint8!!!!,
- * but we want to read 256 over i2c!!!!*/
if (dal_ddc_service_is_in_aux_transaction_mode(ddc)) {
struct aux_payload payload;
--
2.38.1