Maintainers for libdrm2 are Debian X Strike Force <debian-x@lists.debian.org>.
You may want to refer to the following packages that are part of the same source: libdrm-amdgpu1, libdrm-common, libdrm-dev, libdrm-etnaviv1, libdrm-exynos1, libdrm-freedreno1, libdrm-intel1, libdrm-nouveau2, libdrm-omap1, libdrm-radeon1, libdrm-tegra0, libdrm-tests.
You might like to refer to the libdrm2 package page, to the Package Tracking System, or to the source package src:libdrm's bug page.
If you find a bug not listed here, please report it.