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      1  1.1  mrg Random list of problems with i915g:
      2  1.1  mrg 
      3  1.1  mrg - What does this button do? Figure out LIS7 with regards to depth offset.
      4  1.1  mrg 
      5  1.1  mrg - Dies with BadDrawable on GLXFBconfig changes/destruction. Makes piglit totally
      6  1.1  mrg   unusable :( Upgrading xserver helped here, it doesn't crash anymore. Still
      7  1.1  mrg   broken, it doesn't update the viewport/get new buffers.
      8  1.1  mrg 
      9  1.1  mrg - Y-tiling is even more fun. i915c doesn't use it, maybe there's a reason?
     10  1.1  mrg   Texture sampling from Y-tiled buffers seems to work, though (save above
     11  1.1  mrg   problems).
     12  1.1  mrg   RESOLVED: Y-tiling works with the render engine, but not with the blitter.
     13  1.1  mrg   Use u_blitter and hw clears (PRIM3D_CLEAR_RECT).
     14  1.1  mrg 
     15  1.1  mrg - src/xvmc/i915_structs.h in xf86-video-intel has a few more bits of various
     16  1.1  mrg   commands defined. Scavenge them and see what's useful.
     17  1.1  mrg 
     18  1.1  mrg - Do smarter remapping. Right now we send everything onto tex coords 0-7.
     19  1.1  mrg   We could also use diffuse/specular and pack two sets of 2D coords in a single
     20  1.1  mrg   4D. Is it a big problem though? We're more limited by the # of texture
     21  1.1  mrg   indirections and the # of instructions.
     22  1.1  mrg 
     23  1.1  mrg - Finish front/back face. We need to add face support to lp_build_system_values_array and use it in draw_llvm.c.
     24  1.1  mrg 
     25  1.1  mrg - More optimizations, like replacing ADD + MUL with MAD or use DP2ADD.
     26  1.1  mrg 
     27  1.1  mrg - Replace constants and immediates which are 0,1,-1 or a combination of those with a swizzle.
     28  1.1  mrg 
     29  1.1  mrg - Schedule instructions to minimize the number of phases. One way is to replace
     30  1.1  mrg   R registers responsible for a boundary with U registers to avoid phase
     31  1.1  mrg   boundaries.
     32  1.1  mrg 
     33  1.1  mrg - Continue a previous primitive when there are no state changes
     34  1.1  mrg 
     35  1.1  mrg - Fix fragment discard
     36  1.1  mrg 
     37  1.1  mrg Other bugs can be found here:
     38  1.1  mrg https://bugs.freedesktop.org/buglist.cgi?bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&component=Drivers/Gallium/i915g
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