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ArmPlatformPkg: PCD to swap red/blue format for HDLCD

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This change adds a new PCD PcdArmHdlcdSwapBlueRedSelect
to swap values for HDLCD RED_SELECT and BLUE_SELECT registers
on platforms where blue and red hardware lines are swapped.

If set to TRUE in the platform dsc, HDLCD library will swap the values
while setting RED_SELECT and BLUE_SELECT registers. The default
value of the PCD is FALSE.

NOTE: The motive for this is that a discrepancy in the Red/Blue lines
exists between some VersatileExpress platforms.  Rather than have
divergent code, this build switch allows a simple, pragmatic solution.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Girish Pathak <girish.pathak@arm.com>
Signed-off-by: Evan Lloyd <evan.lloyd@arm.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
This commit is contained in:
Girish Pathak
2017-09-26 21:15:25 +01:00
committed by Leif Lindholm
parent fe787dfb0f
commit 268aad6744
3 changed files with 16 additions and 2 deletions
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3
ArmPlatformPkg/ArmPlatformPkg.dec
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@@ -100,6 +100,9 @@
# Default is set to UEFI console font format PixelBlueGreenRedReserved8BitPerColor
gArmPlatformTokenSpaceGuid.PcdGopPixelFormat|0x00000001|UINT32|0x00000040
## If set, this will swap settings for HDLCD RED_SELECT and BLUE_SELECT registers
gArmPlatformTokenSpaceGuid.PcdArmHdLcdSwapBlueRedSelect|FALSE|BOOLEAN|0x00000045
[PcdsFixedAtBuild.common,PcdsDynamic.common]
## PL031 RealTimeClock
gArmPlatformTokenSpaceGuid.PcdPL031RtcBase|0x0|UINT32|0x00000024