Hello Josh, Le Fri, 2 Sep 2011 17:08:32 +0800, "Wu, Josh" <Josh.wu@xxxxxxxxx> a écrit : > My understanding is that you want to use Atmel ISI to output RGB data > then work with framebuffer. So yes, it is possible. Good. > Since current atmel_isi.c only uses its codec path to output YUV > data. So first need add RGB format support in > isi_camera_get_formats(). Then you have two choices to enable RGB > output of ISI: 1. Enable isi's preview path(DMA, interrupts) to > convert YUV to RGB. 2. Or still use codec path but don't need add > much ISI code, just set camera sensor(if it support RGB565 output) to > output RGB565 data for ISI, then what the data ISI output now should > be RGB565 format. But in this way you cannot do any scale. Doing the YUV -> RGB within the V4L2 driver is something I understand quite well. The part I miss is how the V4L2 driver interacts with the framebuffer driver to output the camera image into the framebuffer. > For V4L2_CAP_VIDEO_OVERLAY type driver, I don't know much about that. Hum, ok, found http://v4l2spec.bytesex.org/spec/x6570.htm which seems to explain a bit the userspace interface for this. Thanks for your feedback! Thomas -- Thomas Petazzoni, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com -- 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
