From Mesa 19.3.0 released only last a few days time, now, to avoid the Christmas and New Year holidays, Mesa 19.3.1 also immediately released, compared with their normal release date as early as a week.
According to reports, Mesa 19.3.1 is a small version. There are some minor amendments, most of which are for Intel drivers, in addition, has radv, virgl and core dri fixes.
This version of some of the specific updates include: visual disclosed B8G8R8X8 sRGB support for the Intel i965 driver; for scan buffer without modifiers on Intel Iris, the default is X-tiling; and Intel Vulkan driver only in practice when supported public filter_minmax extended support.
At the same time, Radeon aspects of a fix a Stoney APU fixes, and a new compilation of RADV safety features, breaking the ARM support. Further, in this version, Virgl shader driver also doubles the size of the transmit buffer.
For more detailed information, you can visit announced to view it.
It is worth mentioning that, with the release of Mesa 19.3.1, Mesa 19.2.8 also plans a final series of the quarter as the update is released.
Reference News:
https://lists.freedesktop.org/archives/mesa-dev/2019-December/223969.html
https://www.phoronix.com/scan.php?page=news_item&px=Mesa-19.3.1-Released