The usage should be client first call AddrComputeSurfaceInfo() on
depth surface with flag "matchStencilTilecfg", AddrLib will use
2DThin1 tile index for depth as much as possible and do not down grade
unless alignment requirement cannot be met.
1. If there is a matched 2DThin1 tile index for stencil which make
sure they will share same tile config parameters, then return the
stencil 2DThin1 tile index as well.
2. If using 2DThin1 tile mode cannot make sure such thing happen, and
TcCompatible flag was set, then ignore this flag then try 2DThin1 tile
mode for depth and stencil again.
3. If 2DThin1 tile mode cannot make sure depth and stencil to have
same tile config parameters, then down grade depth surface tile mode
to 1DThin1.
4. If depth surface's tile mode was 1DThin1, then return 1DThin1 tile
index for stencil.
5. If depth surface's tile mode is PRT, then return invalid tile index
to stencil since their tile config parameters will never be met.
Client driver then check the returned tile index of stencil -- if it
is not invalid tile index, then call AddrComputeSurfaceInfo() on
stencil surface with the returned stencil tile index to get full
output information. Please note, client needs to set flag
"useTileIndex" when AddrLib get created.
1) minimizePadding - Use 1D tile mode if padded size of 2D is bigger
than 1D
2) maxBaseAlign - Force PRT tile mode if macro block size is bigger than
requested alignment.
Also, related changes to tile mode optimization for needEquation.
1. Add new surface flags needEquation for client driver use to force
the surface tile setting equation compatible. Override 2D/3D macro
tile mode to PRT_* tile mode if this flag is TRUE and num slice > 1.
2. Add numEquations and pEquationTable in ADDR_CREATE_OUTPUT structure
to return number of equations and the equation table to client driver
3. Add equationIndex in ADDR_COMPUTE_SURFACE_INFO_OUTPUT structure to
return the equation index to client driver
Please note the use of address equation has following restrictions:
1) The surface can't be splitable
2) The surface can't have non zero tile swizzle value
3) Surface with > 1 slices must have PRT tile mode, which disable
slice rotation
Sometimes client driver passes valid tile info into address library,
in this case, the tile index is computed in function
HwlPostCheckTileIndex instead of CiAddrLib::HwlSetupTileCfg.
We need to call HwlPostCheckTileIndex to calculate the correct tile
index to get tile split bytes for this case.
When clients queries tile Info from tile index and expects accurate
tileSplit info, bits per pixel info is required to be provided since
this is necessary for computing tileSplitBytes; otherwise Addrlib will
return value of "tileBytes" instead if bpp is 0 - which is also
current logic. If clients don't need tileSplit info, it's OK to pass
bpp with value 0.
Nicolai Hähnle
Kevin Furrow
Joe Ma
Frans Gu
Xavi Zhang
Sabre Shao
Roy Zhan
Kevin Zhao
XiaoYuan Zheng
Carlos Xiong