1 Random 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 48 Other bugs can be found here: 49 https://bugs.freedesktop.org/buglist.cgi?bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&component=Drivers/Gallium/i915g 50
