Comment # 10 on bug 76130 from Jim

Ardien at https://bugzilla.kernel.org/show_bug.cgi?id=71891 they state
"...found in the kernel source file drivers/gpu/drm/radeon/rv770.c. Despite the
name this function is used for RV710, RV730 (yours) and RV770.".  So my
uneducated guess is that the patch does apply to you.