This is a note to let you know that I've just added the patch titled drm/amd/display: Fix HDMI VSIF V3 incorrect issue to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-amd-display-fix-hdmi-vsif-v3-incorrect-issue.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit b21163f51ed81da870693b2604af4135f76970c3 Author: Leo Ma <hanghong.ma@xxxxxxx> Date: Fri Jul 22 13:42:58 2022 -0400 drm/amd/display: Fix HDMI VSIF V3 incorrect issue [ Upstream commit 0591183699fceeafb4c4141072d47775de83ecfb ] [Why] Reported from customer the checksum in AMD VSIF V3 is incorrect and causing blank screen issue. [How] Fix the packet length issue on AMD HDMI VSIF V3. Reviewed-by: Anthony Koo <Anthony.Koo@xxxxxxx> Acked-by: Tom Chung <chiahsuan.chung@xxxxxxx> Signed-off-by: Leo Ma <hanghong.ma@xxxxxxx> Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c index b99aa232bd8b1..4bee6d018bfa9 100644 --- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c +++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c @@ -567,10 +567,6 @@ static void build_vrr_infopacket_data_v1(const struct mod_vrr_params *vrr, * Note: We should never go above the field rate of the mode timing set. */ infopacket->sb[8] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000); - - /* FreeSync HDR */ - infopacket->sb[9] = 0; - infopacket->sb[10] = 0; } static void build_vrr_infopacket_data_v3(const struct mod_vrr_params *vrr, @@ -638,10 +634,6 @@ static void build_vrr_infopacket_data_v3(const struct mod_vrr_params *vrr, /* PB16 : Reserved bits 7:1, FixedRate bit 0 */ infopacket->sb[16] = (vrr->state == VRR_STATE_ACTIVE_FIXED) ? 1 : 0; - - //FreeSync HDR - infopacket->sb[9] = 0; - infopacket->sb[10] = 0; } static void build_vrr_infopacket_fs2_data(enum color_transfer_func app_tf, @@ -726,8 +718,7 @@ static void build_vrr_infopacket_header_v2(enum signal_type signal, /* HB2 = [Bits 7:5 = 0] [Bits 4:0 = Length = 0x09] */ infopacket->hb2 = 0x09; - *payload_size = 0x0A; - + *payload_size = 0x09; } else if (dc_is_dp_signal(signal)) { /* HEADER */ @@ -776,9 +767,9 @@ static void build_vrr_infopacket_header_v3(enum signal_type signal, infopacket->hb1 = version; /* HB2 = [Bits 7:5 = 0] [Bits 4:0 = Length] */ - *payload_size = 0x10; - infopacket->hb2 = *payload_size - 1; //-1 for checksum + infopacket->hb2 = 0x10; + *payload_size = 0x10; } else if (dc_is_dp_signal(signal)) { /* HEADER */