i965: Fall back to GL 4.2/4.3 on Haswell if the kernel isn't new enough.
In commit
d2590eb65ff28a9cbd592353d15d7e6cbd2c6fc6 I enabled GL 4.5
on Haswell...but failed to check if we could do indirect compute
shader dispatch...and query buffer objects.
Indirect compute shader dispatch requires command parser version 5
(kernel commit
7b9748cb513a6bef4af87b79f0da3ff7e8b56cd8, which is in
Linux v4.4). On earlier kernels we would have disabled
ARB_compute_shader, which is a mandatory part of OpenGL 4.3+.
Query buffer objects currently require MI_MATH and MI_LOAD_REGISTER_REG,
which mean command parser version 7 (Linux v4.8). On earlier kernels
we would have disabled ARB_query_buffer_object, which is a mandatory
part of OpenGL 4.4+.
The new version support looks like:
- Kernel 4.1 and older => OpenGL 3.3
- Kernel 4.2-4.3 => OpenGL 4.2
- Kernel 4.4-4.7 => OpenGL 4.3
- Kernel 4.8+ => OpenGL 4.5
Cc: "17.0" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>