Hi, I've been converting pxa_camera driver from videobuf to videobuf2, and I have a question about multiple plane semantics. I have a case where I have 3 planes for a yuv422 capture : - 1 Y plane (total_size / 2 bytes) - 1 U plane (total_size / 4 bytes) - 1 V plane (total_size / 4 bytes) I would have expected vb2_dma_sg_plane_desc(vb, i) to return me 3 different sg_tables, one for each plane. I would have been then able to feed them to 3 dmaengine channels (this is the case for pxa27x platform), so that the 3 planes are filled in concurrently. My understanding is that videobuf2-dma-sg has only 1 sg_table, which seems to be enforced by vb2_dma_sg_cookie(), so the question is : is it on purpose, and how do the multiple planes are handled within videobuf2-dma-sg ? Cheers. -- Robert -- 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
