Comment 111 for bug 349314

@pitti -- yes it does appear to be a large chunk of code. However in the main for this chipset the affected hardware should already have been enabled by the BIOS. It is not normal for this driver to run with that part of the support disabled on the hardware which supports it. The code presented here to enable it should only trigger when the BIOS has not already enabled it. For the normal system it should be a noop. Enabling this hardware correctly should bring the affected systems closer to a normal configuration and in that sense to a more tested position.

It also should be noted that the performance regression introduced by the lack of this support is very severe (this component was enabled in previous releases). It is particularly severe on smaller systems such as those in the netbook market which are effectively rendered useless for video playback as well as being extremely sluggish in general use.