On Fri, Oct 20, 2023 at 04:37:36PM -0400, George Koehler wrote: > On Thu, 19 Oct 2023 11:00:42 +1100 > Jonathan Gray <j...@openbsd.org> wrote: > > > Are there multiple models of iMac11,2 or is this due to something > > not acting as linux does? > > Yes, iMac11,2 (21.5-inch, Mid 2010) has 3 models in everymac.com, > - Core i3 3.06 GHz, Radeon HD 4670, 256M vram > - Core i3 3.2 GHz, Radeon HD 5670, 512M vram > - Core i5 3.6 GHz, Radeon HD 5670, 512M vram > > These Radeons might differ. Marcus's 3.06 has product id 0x9488, > which in drm/drm_pciids.h is CHIP_RV730. An iMac11,2 3.2 in > OpenBSD's dmesg collection has id 0x68c0, which is CHIP_REDWOOD. > > An iMac probably has its original graphics card. A Mac tower can > swap cards; a PowerMac7,3 might have radeon or nvidia. > > --gkoehler
This particular quirk is only done on the Radeon HD 4670/RV730 model due to the earlier DCE test: 0x9488 Mobility Radeon HD 4670 (RV730) 0x68c0 Mobility Radeon HD 5730 (REDWOOD) https://www.x.org/wiki/RadeonFeature/ RV730 is DCE3.2 REDWOOD is DCE4 if (ASIC_IS_DCE32(rdev)) { if (dmi_match(DMI_PRODUCT_NAME, "iMac10,1") || dmi_match(DMI_PRODUCT_NAME, "iMac11,2"))
