On Wed, 4 Jan 2012, Laurent Pinchart wrote: > Hi Guennadi, > > On Wednesday 04 January 2012 17:35:27 Guennadi Liakhovetski wrote: > > On Wed, 4 Jan 2012, javier Martin wrote: > > > > [snip] > > > > > For ov7725 it is a natural thing to do since it was originally > > > developed for soc-camera and it can easily do the following to access > > > platform data: > > > > > > struct soc_camera_link *icl = soc_camera_i2c_to_link(client); > > > pdata = icl->priv; > > > > > > However, tvp5150 is not aware about soc_camera. I should be able to > > > tell whether it's being used with soc-camera or not. If soc camera was > > > used I would do the previous method to retrieve platform data. > > > But if soc-camera was not used I would do the classic method: > > > > > > struct tvp5150_platform_data *pdata = client->dev.platform_data; > > > > > > The problem is how to distinguish in tvp5150 whether I am using > > > soc_camera or not. > > > > Right, that _is_ the problem now. And we've known about it since the very > > first time we started to think about re-using the subdev drivers. The only > > solution I see so far is to introduce a standard platform data struct for > > all subdevices, similar to soc_camera_link. We could use it as a basis, of > > course, use a generic name, maybe reconsider fields - rename / remove / > > add, but the principle would be the same: a standard platform data struct > > with an optional private field. > > Why is that needed ? Why can't a tvp5150-specific platform data structure do ? Javier has actually explained this already. Ok, again: he wants to use tvp5150 with an soc-camera host driver, i.e., with the soc-camera subsystem. And the soc-camera core sets board_info->platform_data itself to a pointer to the struct soc_camera_link instance. Thanks Guennadi --- Guennadi Liakhovetski, Ph.D. Freelance Open-Source Software Developer http://www.open-technology.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
