From: Leo Ma <hanghong...@amd.com>

[ 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....@amd.com>
Acked-by: Tom Chung <chiahsuan.ch...@amd.com>
Signed-off-by: Leo Ma <hanghong...@amd.com>
Tested-by: Daniel Wheeler <daniel.whee...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 .../drm/amd/display/modules/freesync/freesync.c   | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c 
b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
index 03fa63d56fa6..948151e73573 100644
--- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
+++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
@@ -615,10 +615,6 @@ 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,
@@ -686,10 +682,6 @@ 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,
@@ -774,8 +766,7 @@ 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 */
@@ -824,9 +815,9 @@ 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 */
-- 
2.35.1

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