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... regards Jan 2011/8/4 Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>: > Hello Jan, > > On Thu, Aug 04, 2011 at 03:11:11PM +0200, Jan Pohanka wrote: >> Dear Uwe, >> could you please give me some advice once more? It seems I'm not >> able to make mx2_camera working by myself. >> I have tried dma memory allocation in my board file in several ways, >> but nothing seems to work. I use Video capture example for v4l2 for >> testing. >> >> regards >> Jan >> >> mx27ipcam_camera_power: 1 >> mx27ipcam_camera_reset >> mx2-camera mx2-camera.0: Camera driver attached to camera 0 >> mx2-camera mx2-camera.0: dma_alloc_coherent size 614400 failed >> mmap error 12, Cannot allocate memory >> mx2-camera mx2-camera.0: Camera driver detached from camera 0 >> mx27ipcam_camera_power: 0 > Cannot say offhand. I'd instrument dma_alloc_from_coherent to check > where it fails. > > The patch looks OK from a first glance. > > 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
