lkml.org 
[lkml]   [2022]   [Aug]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH AUTOSEL 5.15 04/20] drm/amd/display: Fix HDMI VSIF V3 incorrect issue
Date
From: Leo Ma <hanghong.ma@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.Koo@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>
Signed-off-by: Sasha Levin <sashal@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 b99aa232bd8b..4bee6d018bfa 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 */
--
2.35.1
\
 
 \ /
  Last update: 2022-08-25 03:42    [W:1.499 / U:0.028 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site