Please, don't drop the mailing list from the CC list. On Wed, 3 Oct 2012, Alex Pollard wrote: > Thanks! > > I have found that in their demo application the capture board developer > (e-consystems) supports various interlacing options thru ioctl calls. So > I think I will find a solution. Isn't specifying one of V4L2_FIELD_INTERLACED* values in standard V4L2 ioctl()s enough? Or is this what you mean? > The main issue now is the ability to do > overlays on the low-latency framebuffer preview, I am guessing > ipu_prp_vf_sdc_bg.c provides a way to accomplish this. Sorry, I don't know what file you mean. In any case you'd have to implement overlay support in the mx3fb.c framebuffer driver. Thanks Guennadi > Cheers, > Alex > > -----Original Message----- > From: Guennadi Liakhovetski [mailto:g.liakhovetski@xxxxxx] > Sent: Wednesday, 3 October 2012 5:06 PM > To: Alex Pollard > Cc: Linux Media Mailing List > Subject: Re: Previewing PAL fields on framebuffer > > Hi Alex > > (added linux-media to CC on your request) > > On Wed, 3 Oct 2012, Alex Pollard wrote: > > > Hi, > > > > I am wondering if it is possible to use the DMA features in > > drivers/dma/ipu/ipu_idmac.c to write the top field of a PAL frame into a > > framebuffer on alternating lines, and write the bottom field of the PAL > > frame to the other lines ie deinterlace. > > Looking at the i.MX31 CSI documentation it seems it could be possible to > use CSI_SENS_FRM_SIZE and CSI_ACT_FRM_SIZE to specify stride != width to > basically do stride = 2 * width and then do 2 transfers per frame - one > beginning with line 0 and one beginning with line 1? But that's just an > idea, the description of those registers is vague and I'm also not sure > how to implement that. > > Good luck > Guennadi > > > Do you know a good discussion > > list where I could post the question? I am using an i.MX53 but the > > support "community" is a bit quiet. > > > > Thanks > > > > Alex Pollard > > Software Engineer > > > > --- > Guennadi Liakhovetski, Ph.D. > Freelance Open-Source Software Developer > http://www.open-technology.de/ > --- Guennadi Liakhovetski, Ph.D. Freelance Open-Source Software Developer http://www.open-technology.de/ -- 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
