Using
export LIBVA_MESSAGING_LEVEL=2; export LIBVA_DRIVER_NAME=radeonsi; gdb
--directory . --directory ../libva-2.17.0 --directory ../mesa-22.3.6
--args /usr/bin/vainfo
I've stepped through vainfo and focused on va_openDriver() which
eventually leads to:
(gdb) n
libva info: Found init function __vaDriverInit_1_17
502 struct VADriverVTable *vtable = ctx->vtable;
(gdb) n
503 struct VADriverVTableVPP *vtable_vpp =
ctx->vtable_vpp;
(gdb) n
504 struct VADriverVTableProt *vtable_prot =
ctx->vtable_prot;
(gdb) n
507 if (!vtable) {
(gdb) n
508 vtable = calloc(1, sizeof(*vtable));
(gdb) n
509 if (!vtable)
(gdb) n
512 ctx->vtable = vtable;
(gdb) n
514 if (!vtable_vpp) {
(gdb) n
515 vtable_vpp = calloc(1, sizeof(*vtable_vpp));
(gdb) n
516 if (vtable_vpp)
(gdb) n
517 vtable_vpp->version =
VA_DRIVER_VTABLE_VPP_VERSION;
(gdb) n
521 ctx->vtable_vpp = vtable_vpp;
(gdb) n
523 if (!vtable_prot) {
(gdb) n
524 vtable_prot = calloc(1, sizeof(*vtable_prot));
(gdb) n
525 if (vtable_prot)
(gdb) n
526 vtable_prot->version =
VA_DRIVER_VTABLE_PROT_VERSION;
(gdb) n
530 ctx->vtable_prot = vtable_prot;
(gdb) n
532 if (init_func && VA_STATUS_SUCCESS == vaStatus)
(gdb) n
533 vaStatus = (*init_func)(ctx);
(gdb) s
535 if (VA_STATUS_SUCCESS == vaStatus) {
(gdb) p vaStatus
$4 = 2
(gdb) n
583 va_errorMessage(dpy, "%s init failed\n",
driver_path);
