1Random list of problems with i915g:
2
3- Add support for PIPE_CAP_POINT_SPRITE either via the draw module or directly
4  via the hardware, look at the classic driver, more advanced.
5
6- What does this button do? Figure out LIS7 with regards to depth offset.
7
8- Dies with BadDrawable on GLXFBconfig changes/destruction. Makes piglit totally
9  unusable :( Upgrading xserver helped here, it doesn't crash anymore. Still
10  broken, it doesn't update the viewport/get new buffers.
11
12- Kills the chip in 3D_PRIMITIVE LINELIST with mesa-demos/fbotexture in
13  wireframe mode. Changing the cullmode to cw from none mitigates the crash. As
14  does emitting only one line segment (2 indices) per 3D_PRIMITIVE command in
15  the batch.
16
17- Y-tiling is even more fun. i915c doesn't use it, maybe there's a reason?
18  Texture sampling from Y-tiled buffers seems to work, though (save above
19  problems).
20  RESOLVED: Y-tiling works with the render engine, but not with the blitter.
21  Use u_blitter and hw clears (PRIM3D_CLEAR_RECT).
22
23- src/xvmc/i915_structs.h in xf86-video-intel has a few more bits of various
24  commands defined. Scavenge them and see what's useful.
25
26- Do smarter remapping. Right now we send everything onto tex coords 0-7.
27  We could also use diffuse/specular and pack two sets of 2D coords in a single
28  4D. Is it a big problem though? We're more limited by the # of texture
29  indirections and the # of instructions.
30
31- Finish front/back face. We need to add face support to lp_build_system_values_array and use it in draw_llvm.c.
32
33- More optimizations, like replacing ADD + MUL with MAD or use DP2ADD.
34
35- Replace constants and immediates which are 0,1,-1 or a combination of those with a swizzle.
36
37- i915_delete_fs_state doesn't call draw_delete_fragment_shader. Why?
38
39- Schedule instructions to minimize the number of phases. One way is to replace
40  R registers responsible for a boundary with U registers to avoid phase
41  boundaries.
42
43- Continue a previous primitive when there are no state changes
44
45- Switch to the blitter for those buggy blit copies
46- Or state save/restore has a bug with u_blitter, fix it.
47
48Other bugs can be found here:
49https://bugs.freedesktop.org/buglist.cgi?bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&component=Drivers/Gallium/i915g
50