[PATCH 00/26] x86: video: Speed up the framebuffer

2020-05-19 Thread Simon Glass
Some architectures use a cached framebuffer and flush the cache as needed so that changes are visible. This is supported by U-Boot. However x86 uses an uncached framebuffer with a 'write-combining' feature to speed up writes. Reads are permitted but they are extremely expensive. Unfortunately, re

Re: [PATCH 00/26] x86: video: Speed up the framebuffer

2020-05-22 Thread Bin Meng
Hi Simon, On Wed, May 20, 2020 at 7:11 AM Simon Glass wrote: > > Some architectures use a cached framebuffer and flush the cache as needed > so that changes are visible. This is supported by U-Boot. > > However x86 uses an uncached framebuffer with a 'write-combining' feature > to speed up writes

Re: [PATCH 00/26] x86: video: Speed up the framebuffer

2020-05-22 Thread Simon Glass
Hi Bin, On Fri, 22 May 2020 at 09:30, Bin Meng wrote: > > Hi Simon, > > On Wed, May 20, 2020 at 7:11 AM Simon Glass wrote: > > > > Some architectures use a cached framebuffer and flush the cache as needed > > so that changes are visible. This is supported by U-Boot. > > > > However x86 uses an u

Re: [PATCH 00/26] x86: video: Speed up the framebuffer

2020-05-22 Thread Bin Meng
Hi Simon, On Sat, May 23, 2020 at 12:34 AM Simon Glass wrote: > > Hi Bin, > > On Fri, 22 May 2020 at 09:30, Bin Meng wrote: > > > > Hi Simon, > > > > On Wed, May 20, 2020 at 7:11 AM Simon Glass wrote: > > > > > > Some architectures use a cached framebuffer and flush the cache as needed > > > so

Re: [PATCH 00/26] x86: video: Speed up the framebuffer

2020-05-22 Thread Simon Glass
Hi Bin, On Fri, 22 May 2020 at 17:09, Bin Meng wrote: > > Hi Simon, > > On Sat, May 23, 2020 at 12:34 AM Simon Glass wrote: > > > > Hi Bin, > > > > On Fri, 22 May 2020 at 09:30, Bin Meng wrote: > > > > > > Hi Simon, > > > > > > On Wed, May 20, 2020 at 7:11 AM Simon Glass wrote: > > > > > > > >