Comme=
nt # 49
on bug 11089=
7
from =
Richard Thier
Hmmm. There are a lot of FIXMEs in the kernel at this part say=
ing things are
not pretty sure. I think I am running into an other code path I should be
taking, but if this was always like this then maybe "fixing" it w=
ill just cause
a whole lot of errors...
RC410 is said to use the "RAGE 8" architecture:
https://ww=
w.techpowerup.com/gpu-specs/ati-rc410.g757.
Looking up Rage8 it seems to be RV350 so the mesa side seems to be more rig=
ht
about what category it puts my card into.
In this place I see a lot of asics (for example r300_asic and r420_asic):
drivers/gpu/drm/radeon/radeon_asic.c
All of these structs have their rxx_init functions set in the struct (basic=
ally
a vtable using structs and function pointers). I think maybe the wrong one =
is
used for my card.
For example RV410 is said to be r400 architecture card instead of "Rag=
e8"
(RV350) architecture one here:
https://www.=
techpowerup.com/gpu-specs/ati-rv410.g9
It can very likely have happened that the because of the number itself they
classified my Mobility Radeon Xpress 200M as r400 while it is basically an
RV350 and having a marketing-affected naming scheme confusion...
Look at this function:
2306 /**
2307 * radeon_asic_init - register asic specific callbacks
2308 *
2309 * @rdev: radeon device pointer
2310 *
2311 * Registers the appropriate asic specific callbacks for each
2312 * chip family. Also sets other asics specific info like the number
2313 * of crtcs and the register aperture accessors (all asics).
2314 * Returns 0 for success.
2315 */
2316 int radeon_asic_init(struct radeon_device *rdev)
2317 { ...
This is the one that sets the asic and there is a big switch-case for setti=
ng
the "proper" one in the driver based on "rdev->family&quo=
t;.
My RC410 is not directly named here:
case CHIP_R300:
case CHIP_R350:
case CHIP_RV350:
case CHIP_RV380:
if (rdev->flags & RADEON_IS_PCIE)
rdev->asic =3D &r300_asic_pcie;
else
rdev->asic =3D &r300_asic;
break;
case CHIP_R420:
case CHIP_R423:
case CHIP_RV410:
rdev->asic =3D &r420_asic;
/* handle macs */
if (rdev->bios =3D=3D NULL) {
rdev->asic->pm.get_engine_clock =3D
&radeon_legacy_get_engine_clock;
rdev->asic->pm.set_engine_clock =3D
&radeon_legacy_set_engine_clock;
rdev->asic->pm.get_memory_clock =3D
&radeon_legacy_get_memory_clock;
rdev->asic->pm.set_memory_clock =3D NULL;
rdev->asic->display.set_backlight_level =3D
&radeon_legacy_set_backlight_level;
}
break;
case CHIP_RS400:
case CHIP_RS480:
rdev->asic =3D &rs400_asic;
break;
case CHIP_RS600:
(there are other families mentioned here as well, but these are the ones th=
at
might affect my case I think)
According to techpowerup.com saying that Xpress 200M is Rage8 architecture I
should also get an r300 asic and the same as the RV350:
https://www=
.techpowerup.com/gpu-specs/ati-rv350.g13
Also there is this "RS400" asic listed in the above switch case a=
nd it is still
an other candidate maybe but surely not the rs400_asic.