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drm/amd/display: Correct FIXED_VS Link Rate Toggle Condition

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[WHY&HOW]
The condition is only perform toggle if FIXED_VS LTTPR reports
no IEEE OUI.
The literal "\x0,\x0,\x0" contains commas changes the
bytes being compared to {0x00,0x2C,0X00}.
The correct literal should be "\x00\x00\x00" without commas.

Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Signed-off-by: Jing Zhou <Jing.Zhou@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jing Zhou 2025-11-17 15:18:50 +08:00 committed by Alex Deucher
parent 03282bd201
commit 531fe6e0fe
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_fixed_vs_pe_retimer.c
View File

@ -271,7 +271,7 @@ enum link_training_result dp_perform_fixed_vs_pe_training_sequence(
rate = get_dpcd_link_rate(&lt_settings->link_settings);
// Only perform toggle if FIXED_VS LTTPR reports no IEEE OUI
if (memcmp("\x0,\x0,\x0", &link->dpcd_caps.lttpr_caps.lttpr_ieee_oui[0], 3) == 0) {
if (memcmp("\x00\x00\x00", &link->dpcd_caps.lttpr_caps.lttpr_ieee_oui[0], 3) == 0) {
/* Vendor specific: Toggle link rate */
toggle_rate = (rate == 0x6) ? 0xA : 0x6;