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drm/amd/display: Set DISPCLK_MAX_ERRDET_CYCLES to 7

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[ Upstream commit 3577e1678772ce3ede92af3a75b44a4b76f9b4ad ]

[WHY]
DISPCLK_MAX_ERRDET_CYCLES must be 7 to prevent connection loss when
changing DENTIST_DISPCLK_WDIVIDER from 126 to 127 and back.

Signed-off-by: Wesley Chalmers <Wesley.Chalmers@amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Stylon Wang <stylon.wang@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>
This commit is contained in:
Wesley Chalmers 2021-05-20 12:12:48 -04:00 committed by Greg Kroah-Hartman
parent 02f444321b
commit afa06442d2
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
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@ -243,7 +243,7 @@ void dcn20_dccg_init(struct dce_hwseq *hws)
REG_WRITE(MILLISECOND_TIME_BASE_DIV, 0x1186a0);
/* This value is dependent on the hardware pipeline delay so set once per SOC */
REG_WRITE(DISPCLK_FREQ_CHANGE_CNTL, 0x801003c);
REG_WRITE(DISPCLK_FREQ_CHANGE_CNTL, 0xe01003c);
}
void dcn20_disable_vga(