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Subject: Re: [edk2-devel] [PATCH 0/2] MdeModulePkg: Make the screen seamless
To: devel@edk2.groups.io, zhichao.gao@intel.com
Cc: Jian J Wang <jian.j.wang@intel.com>, Hao Wu <hao.a.wu@intel.com>,
 Ray Ni <ray.ni@intel.com>, Star Zeng <star.zeng@intel.com>,
 Liming Gao <liming.gao@intel.com>, Sean Brogan <sean.brogan@microsoft.com>,
 Michael Turner <Michael.Turner@microsoft.com>,
 Bret Barkelew <Bret.Barkelew@microsoft.com>
References: <20190412031436.19088-1-zhichao.gao@intel.com>
From: "Laszlo Ersek" <lersek@redhat.com>
Message-ID: <85e3937d-65d6-11f1-f786-4c169eed628b@redhat.com>
Date: Fri, 12 Apr 2019 10:06:17 +0200
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On 04/12/19 05:14, Gao, Zhichao wrote:
> For now most platforms support display function at PEI phase.
> But the conspliter and graphics console driver would clear the
> screen at BDS connect console phase. Maybe some platforms would
> show logo in the next or maybe not. For consumers, it looks like
> the screen flashed.
> So change the behavior of graphics console devices while connect
> console devices to maintain seamless screen from PEI.
> 
> Test has done on MinPlatform Kabylake-RVP3 which support PEI
> display.
> 
> Cc: Jian J Wang <jian.j.wang@intel.com>
> Cc: Hao Wu <hao.a.wu@intel.com>
> Cc: Ray Ni <ray.ni@intel.com>
> Cc: Star Zeng <star.zeng@intel.com>
> Cc: Liming Gao <liming.gao@intel.com>
> Cc: Sean Brogan <sean.brogan@microsoft.com>
> Cc: Michael Turner <Michael.Turner@microsoft.com>
> Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>
> 
> Aaron Antone (2):
>   MdeModulePkg/ConSplitterDxe: Optimize the ConSplitterTextOutSetMode
>   MdeModulePkg/GraphicsConsoleDxe: Do not clean the screen
> 
>  .../Console/ConSplitterDxe/ConSplitter.c      | 34 +++++++++-----
>  .../Console/ConSplitterDxe/ConSplitter.h      |  4 +-
>  .../GraphicsConsoleDxe/GraphicsConsole.c      | 45 +++++++++----------
>  3 files changed, 48 insertions(+), 35 deletions(-)
> 

EFI_GRAPHICS_OUTPUT_PROTOCOL.SetMode() is specified to clear the screen
to black. Is this series compatible with that?

Thanks,
Laszlo