drm/amd/display: Apply 60us prefetch for DCFCLK <= 300Mhz

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[ Upstream commit 7e60ab4eb3 ]

[Description]
- Previously we wanted to apply extra 60us of prefetch for min DCFCLK
  (200Mhz), but DCFCLK can be calculated to be 201Mhz which underflows
  also without the extra prefetch
- Instead, apply the the extra 60us prefetch for any DCFCLK freq <=
  300Mhz

Reviewed-by: Nevenko Stupar <nevenko.stupar@amd.com>
Reviewed-by: Jun Lei <jun.lei@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Alvin Lee <alvin.lee2@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:

Alvin Lee 2023-05-11 15:25:01 -04:00 • committed by Greg Kroah-Hartman

parent 78b25110eb

commit fbd9332d32

2 changed files with 3 additions and 3 deletions

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4

drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c

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2

drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.h

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