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drm/amd/display: Read Golden Settings Table from VBIOS

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[ Upstream commit 4b81dd2cc6f4f4e8cea0ed6ee8d5193a8ae14a72 ]

[Why]
Dmub read AUX_DPHY_RX_CONTROL0 from Golden Setting Table,
but driver will set it to default value 0x103d1110, which
causes issue in some case

[How]
Remove the driver code, use the value set by dmub in
dp_aux_init

Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Jasdeep Dhillon <jdhillon@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Sherry Wang <YAO.WANG1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sherry Wang
2022-05-10 18:42:18 +08:00
committed by Greg Kroah-Hartman
parent 96c22385c2
commit a2010538c9
1 changed files with 1 additions and 3 deletions
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4
drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.c
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@@ -168,9 +168,7 @@ void enc31_hw_init(struct link_encoder *enc)
AUX_RX_PHASE_DETECT_LEN, [21,20] = 0x3 default is 3
AUX_RX_DETECTION_THRESHOLD [30:28] = 1
*/
AUX_REG_WRITE(AUX_DPHY_RX_CONTROL0, 0x103d1110);
AUX_REG_WRITE(AUX_DPHY_TX_CONTROL, 0x21c7a);
// dmub will read AUX_DPHY_RX_CONTROL0/AUX_DPHY_TX_CONTROL from vbios table in dp_aux_init
//AUX_DPHY_TX_REF_CONTROL'AUX_TX_REF_DIV HW default is 0x32;
// Set AUX_TX_REF_DIV Divider to generate 2 MHz reference from refclk