Hello Jan, On Fri, Aug 05, 2011 at 09:21:36AM +0200, Jan Pohanka wrote: > Hello Uwe, > thank you for the hint. There was problem with insufficient memory. > dma_alloc_from_coherent is called several times and when I allocated > only 4MB, last call failed. When I passed 8MB to > dma_declare_coherent_memory, it works. Unfortunately I do not > understand why 4MB is not enough for 640x480 YUV image... A YUV420 image of size 640x480 needs 1.5 * 640 * 480 bytes (I think). That's ~ 0.5MB. Now it depends how much buffers are allocated. For taking a photo a single buffer is enough, for a video it uses probably more than one. Best regards Uwe -- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | http://www.pengutronix.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
