Hi Bastian, Bastian Hecht wrote: > 2010/11/3 Bastian Hecht <hechtb@xxxxxxxxxxxxxx>: >> Hello ISP team, >> >> I succeeded to stream the first images from the sensor to userspace >> using Laurent's media-ctl and yafta. Unfortunately all images are >> black (10MB of zeros). >> Once by chance I streamed some images (1 of 20 about) with content. >> All values were < 0x400, so that I assume the values were correctly >> transferred for my 10-bit pixels. >> >> I shortly describe my setup: >> As I need xclk_a activated for my sensor to work (I2C), I activate the >> xclk in the isp_probe function. Early hack that I want to remove >> later. It _might_ be better to have this in isp_get(). >> While I placed my activation in mid of the probe function, I had >> somehow the interrupts disabled when trying to stream using yafta. So >> I hacked in the reenabling of the interrupts somewhere else in probe() >> too. That should definitely not be necessary. The interrupts are enabled in isp_get(). >> As I dug through the isp code I saw that it is better to place the >> clock activation after the final isp_put in probe() then the >> interrupts keep working, but this way I never got a valid picture so >> far. It's all a mess, I know. I try to transfer the activation to my >> sensor code and board-setup code like in the et8ek8 code. > > I enabled isr debugging (#define ISP_ISR_DEBUG) and see that only 1 > HS_VS_event is generated per second. 1fps corresponds to my clocking, > so 1 vs per second is fine. But shouldn't I see about 2000 hs > interrupts there too? HS_VS_IRQ is described as "HS or VS synchro > event". Are you getting any other interrupts? Basically every ISP block which is on the pipe will produce interrupts. Which ISP block is writing the images to memory for you? >> However... please help me get rid of these zeros! I keep reading >> through the ISP and the mt9p031 docs to find some settings that could >> have influence on the data sampling. The sensor is working fine now, >> so the solution should be somewhere within the isp. Maybe a stupid question, but have you set exposure and gain to a reasonable value? :-) Regards, -- Sakari Ailus sakari.ailus@xxxxxxxxxxxxxxxxxxxxxxxxxx -- 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
