On Wed, May 27, 2026 at 3:54 PM Aurelien Jarno <[email protected]> wrote: > > Hi Dominique, > > On 2026-05-27 13:34, Dominique Belhachemi wrote: > > Source: linux > > Severity: wishlist > > X-Debbugs-Cc: [email protected] > > User: [email protected] > > Usertags: riscv64 > > > > Dear maintainer, > > > > Please enable CMA on riscv64. > > > > CONFIG_CMA=y > > CONFIG_DMA_CMA=y > > Both options got enabled starting with linux 7.1~rc3-1~exp1, currently > available in experimental. Could you please confirm that it works for > your use case? > Hi Aurelien, Thank you, yes it works. I just tested it with 7.1~rc4-1~exp1 on a VisionFive 2 SBC with additional HDMI patches. Debian's kernel config uses CONFIG_CMA_SIZE_MBYTES=64 which is good enough for two 1920x1080 framebuffers. For 4K I could simply specify cma=128M on the cmdline.
Best -Dominique
