drm/amd/display: fix eDP fast bootup for pre-raven asic

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[Why]
For fastboot, Bios will light up eDP before SW driver is loaded. SW
driver will check if eDP is lit by bios through reading the
BIOS_SCRATCH_3 register. If lit, SW driver will not power down eDP
power and phy to save time.

Definition of BIOS_SCRATCH_3 are missing for pre-raven asic. This
causes eDP fast boot to not work property. For some eDP panels, even
if dp tx sends NoVideoStream_flag =1 and dpcd 0x600=2, eDP rx may not
handle properly. This may cause a short flash on screen.

[How] Add definition of BIOS_SCRATCH_3 for all asic

Signed-off-by: hersen wu <hersenxs.wu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Acked-by: Yongqiang Sun <yongqiang.sun@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

hersen wu 2019-01-11 10:39:30 -05:00 • committed by Alex Deucher

parent 3741540e04

commit c69dffab81

6 changed files with 10 additions and 2 deletions

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3

drivers/gpu/drm/amd/display/dc/bios/bios_parser_helper.c

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2

drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c

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2

drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c

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2

drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c

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1

drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c

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2

drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c

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