Mauro, What do you suggest for this? Could we allocate coherent device memory using dma_declare_coherent_memory() ? This seems the only way to do it unless, video buffer layer does this when initializing the queue. Murali Karicheri Software Design Engineer Texas Instruments Inc. Germantown, MD 20874 Phone : 301-515-3736 email: m-karicheri2@xxxxxx >-----Original Message----- >From: linux-media-owner@xxxxxxxxxxxxxxx [mailto:linux-media- >owner@xxxxxxxxxxxxxxx] On Behalf Of Hans Verkuil >Sent: Thursday, July 30, 2009 10:26 AM >To: Karicheri, Muralidharan >Cc: Laurent Pinchart; Mauro Carvalho Chehab; Dongsoo, Nathaniel Kim; >v4l2_linux; Dongsoo Kim; 박경민; jm105.lee@xxxxxxxxxxx; >�세문; 대�기; 김ؕ준 >Subject: RE: How to save number of times using memcpy? > > >> Hans, >> >> I don't see the code you are referring to. Here is the probe() from the >> next branch of v4l-dvb. Could you point out the code that does the >> allocation of frame buffers ? I had used this code as reference when >> developing vpfe capture driver. >> >> Murali > >My apologies, I got it mixed up with older versions of this driver. I see >that it now uses videobuf-dma-contig. This is going to be a real problem >since this makes it impossible (or at least very hard) to allocate memory >up front. I'm no expert on videobuf, but this is something that should be >addressed, especially in the dma-contig case. > >Regards, > > Hans > >-- >Hans Verkuil - video4linux developer - sponsored by TANDBERG > >-- >To unsubscribe from this list: send the line "unsubscribe linux-media" in >the body of a message to majordomo@xxxxxxxxxxxxxxx >More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
