Hi Laszlo, Thanks for your support, let me look on this
> On 23-Nov-2018, at 2:49 PM, Laszlo Ersek <[email protected]> wrote: > >> On 11/23/18 07:27, prabin ca wrote: >> Hi Team, >> >> I’m new to UEFI and display interface in UEFI. I would like to have deep >> dive into how display is working in UEFI (display architecture) and how >> display is have been bring up (porting of display panel in a any platform in >> general ). >> >> Please help me with sample codes and necessary documents. I would like to >> get knowledge about display bring up and display architecture in UEFI > > The driver writers' guide and the UEFI spec have relevant chapters on > this. I think it's best to start reading the former, at "23 Graphics > Driver Design Guidelines"; that part will give you the pointers to the > rest as well. > > https://github.com/tianocore/tianocore.github.io/wiki/UEFI-Driver-Writer%27s-Guide > > > For a (hopefully educational) example, I refer you to > OvmfPkg/VirtioGpuDxe. In the series that first added this driver to > edk2, I managed to construct the driver in stages such that each stage > would build and even function, at the level expected from that stage. In > particular, commit a2a4fa66701d ("OvmfPkg/VirtioGpuDxe: introduce with > Component Name 2 and Driver Binding", 2016-09-01) could prove helpful, > as it adds the skeleton of the driver, mostly without VirtIo GPU specifics. > > > In addition, you might want to look into the generic > > MdeModulePkg/Universal/Console/GraphicsOutputDxe > > driver. A platform may be able to incorporate that driver without any > changes, and control it by first producing the two HOBs in the PEI phase > that the driver consumes: > > MdePkg/Include/Guid/GraphicsInfoHob.h > > (... Interestingly, due to the fact that this header file is under > MdePkg and not MdeModulePkg, I've just learned, from the related commit > messages, that the PEI phase has standardized graphics support, > described in the PI spec. From the following two commit messages: > > - 697c6cf32693 ("MdePkg: Add PI 1.4 Graphics HOB and PPI header files", > 2015-04-28) > > - 2af538fbf667 ("MdeModulePkg: Add GraphicsOutputDxe driver.", 2016-10-12) > > it appears that enabling graphics support in the PEI phase could be a > *requirement* for using GraphicsOutputDxe in the DXE phase. That might > or might not match your use case, so perhaps it will prevent you from > using GraphicsOutputDxe. I'm not sure.) > > Thanks > Laszlo _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
