The DISCARD_WHOLE_RESOURCE path in v3d_map_usage_prep() replaces the
resource's BO with v3d_resource_bo_alloc(). As the RCL resolves
rsc->bo at job submit in emit_rcl() any pending write job would
store to the new BO instead of the old one, corrupting the new
written data.
This is adressed by flushing all pending write jobs affecting the
resource before replacing its BO.
This fixes multiple tests where data copied to a renderbuffer was
overwritten by a previos GPU clear. Test are from the subgroup:
dEQP-GLES31.functional.copy_image.non_compressed.viewclass_32_bits.*
Fixes: 45bb8f2957 ("broadcom: Add V3D 3.3 gallium driver called "vc5", for BCM7268.")
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40180>
1eaa46da09