[Linux-fbdev-devel] rotation

[Hinko K. <hin...@ce...>]

Hello,

We have a 320x240 color TFT LCD display attached to EPSON s1d13706 chip. Currently the display does not need rotating, but with the new LCD panel that replaced the old one a rotation of 180 degrees needs to be applied. We have our own framebuffer driver - similar to drivers/video/s1d13xxxfb.c but with some additional stuff for our architecture (cris).

The question arises where is the best place to implement this rotation?

I reckon it is the kernel, since all userspace need to use framebuffer transparently.
We don't use the fbcon at all so fbcon rotation is not an option. I've spotted fb_rotate field in struct fb_ops with the deprecated comment (seen in skeletonfb.c). I guess this is not an option too..

Then I guess I'm left with (re-)implementing the fb_mmap/fb_read/fb_write/fb_fillrect/fb_copyarea/fb_imageblit ?!?!

Any comments?

Best regards,
Hinko

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