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gma: Add option to keep port power after Scan_Ports()

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This is useful when we only want to probe for connected displays while
another entity currently controls the outputs.

Also introduce an `All_Ports` list, that can be used when it's unknown
which ports are actually implemented (the default now, when no port
list is provided to `Scan_Ports()`).

Change-Id: I5d8e289a907fe99c673084afbce54da65ba98e9c
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/18123
Tested-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
This commit is contained in:
Nico Huber
2016-12-16 14:22:32 +01:00
committed by Nico Huber
parent 4798c6629c
commit 4c7356db3b
2 changed files with 13 additions and 7 deletions
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11
common/hw-gfx-gma-display_probing.adb
View File

@@ -166,9 +166,10 @@ is
end Probe_Port;
procedure Scan_Ports
(Configs : out Pipe_Configs;
Ports : in Port_List;
Max_Pipe : in Pipe_Index := Pipe_Index'Last)
(Configs : out Pipe_Configs;
Ports : in Port_List := All_Ports;
Max_Pipe : in Pipe_Index := Pipe_Index'Last;
Keep_Power : in Boolean := False)
is
Probe_Internal : Boolean := False;
@@ -211,7 +212,9 @@ is
end loop;
-- Restore power settings
Power_And_Clocks.Power_Set_To (Cur_Configs);
if not Keep_Power then
Power_And_Clocks.Power_Set_To (Cur_Configs);
end if;
-- Turn panel power off if probing failed.
if Probe_Internal and not Port_Configured (Configs, Internal) then

9
common/hw-gfx-gma-display_probing.ads
View File

@@ -17,10 +17,13 @@ is
type Port_List_Range is range 0 .. 7;
type Port_List is array (Port_List_Range) of Port_Type;
All_Ports : constant Port_List :=
(DP1, DP2, DP3, HDMI1, HDMI2, HDMI3, Analog, Internal);
procedure Scan_Ports
(Configs : out Pipe_Configs;
Ports : in Port_List;
Max_Pipe : in Pipe_Index := Pipe_Index'Last);
(Configs : out Pipe_Configs;
Ports : in Port_List := All_Ports;
Max_Pipe : in Pipe_Index := Pipe_Index'Last;
Keep_Power : in Boolean := False);
end HW.GFX.GMA.Display_Probing;