On Thu, Mar 08, 2018 at 04:06:01AM +0000, Luis R. Rodriguez wrote: > On Thu, Mar 08, 2018 at 03:16:29AM +0000, French, Nicholas A. wrote: > > On Wed, Mar 07, 2018 at 07:02:05PM +0000, Luis R. Rodriguez wrote: > > > On Tue, Mar 06, 2018 at 09:01:10PM +0000, French, Nicholas A. wrote: > > > > any reason why PAT can't be enabled for ivtvfb as simply as in the attached > > > > patch? > > > > > > Prior to your change the OSD buffer was obtained using the itv->dec_mem + oi->video_rbase > > > given itv->dec_mem was initialized via [...] > > > itv->dec_mem = ioremap_nocache(itv->base_addr + IVTV_DECODER_OFFSET - oi->video_buffer_size, > > > IVTV_DECODER_SIZE); > > > > Ah, I see. So my proposed ioremap_wc call was only "working" by aliasing the > > ioremap_nocache()'d mem area and not actually using write combining at all. > > There are some debugging PAT toys out there I think but I haven't played with > them yet or I forgot how to to confirm or deny this sort of effort, but > likeley. In fact come to think of it I believe some neurons are telling me that if two type does not match we'd get an error? Luis
