Instead of being globbed into the RSD, Valhall uses minimal shader program
descriptors. For IDVS, we need separate descriptors for position and varying
shaders. It's actually worse -- we need separate descriptors for drawing points
and drawing lines/triangles in order to skip over the gl_PointSize write. Adapt
prepare_shader to upload all these descriptors.
Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16035>
Alyssa Rosenzweig
351403fe75