Hi Guennadi, On 12/8/09, Alan Carvalho de Assis <acassis@xxxxxxxxx> wrote: > Hi Guennadi, ... >>> I am trying to use an OV2640 camera with soc_camera. >>> >>> I'm using ov772x driver as base, but it needs too much modification to >>> work with ov2640. >> >> I don't know that sensor specifically, but they can be quite different. >> > > Yes, in fact ov2640 appears quite different compared to ov772x and ov9640. > >>> The OV2640 chip remaps all registers when register 0xFF is 1 or when it >>> is >>> 0. >> >> This is not unusual. There are a few ways to implement this, for example, >> drivers/media/video/rj54n1cb0c.c uses 16-bit addresses, and decodes them >> to bank:register pairs in its reg_read() and reg_write() routines. >> > > Ok, I will try to implement it this way, case nobody suggests me a > better approach. > I got mx27_camera from pengutronix tree and modified it to work with kernel 2.6.32 (few modifications). I added platform data/device on my board using pcm970-baseboard.c as example. In the kernel config I selected: CONFIG_VIDEO_MX27 CONFIG_SOC_CAMERA_OV9640 I noticed a strange behavior: the ov9640 driver is called before mx27_camera: Linux video capture interface: v2.00 >>> Probe OK until now, going to ProbeVideo <<< >>> Probing OV9640 <<< Parent missing or invalid! Driver for 1-wire Dallas network protocol. i.MX SDHC driver usbcore: registered new interface driver usbhid usbhid: v2.6:USB HID core driver oprofile: using timer interrupt. TCP cubic registered NET: Registered protocol family 17 mx27-camera mx27-camera.0: initialising >>> mx27_camera: IRQ request OK! >>> mx27_camera: pcdev OK! >>> mx27_camera: clk_csi OK! mx27-camera mx27-camera.0: Camera clock frequency: 26600000 >>> mx27_camera: DMA request OK! mx27-camera mx27-camera.0: Using EMMA >>> mx27_camera: probe OK until now! mx27-camera mx27-camera.0: Non-NULL drvdata on register >>> mx27_camera: soc_camera_host_register returned 0! Then ov9640 returns error because icd->dev.parent doesn't exist. Did you already see this issue? Best Regards, Alan -- 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
