On 13/05/2011 9:31 AM, Dushara Jayasinghe wrote:
On 12/05/2011 11:31 PM, Jonathan Morton wrote:
On Thu, 2011-05-12 at 17:58 +1000, Dushara Jayasinghe wrote:
Anyway, just would like to find out, how much effort it would take to
add support for devices with 1/2 bits/pixel depth. I noticed that the
current xorg-fbdev implementation doesn't support these depths.
Just to add context to the question, I'm working on an embedded device
with a monochrome LCD. The CPU can generate grayscale images by upping
the frame-rate and modulating the pixels but the hardware implementation
limits the max FR so I can only support about 2 bits per pixel depth.
Would it be sufficient to use an 8bpp greyscale framebuffer and simply
ignore the low-order bits on scanout?
Thanks for you reply Jonathan.
Maybe I'm a bit out of my depth (hehe) here, could you elaborate on this
please? The CPU (iMX.25) LCD peripheral (LCDC module) uses a chunk of
memory to scan out and the bit depth is determined by the video mode
used. My understanding is, the X FB drv writes directly to this chunk of
memory (please correct me if I'm wrong). What step are you referring to
as scanout?
Just curious. Why is it that whenever I ask for things to be elaborated,
the thread hits dead end? Am I posting to the wrong list?
_______________________________________________
[email protected]: X.Org development
Archives: http://lists.x.org/archives/xorg-devel
Info: http://lists.x.org/mailman/listinfo/xorg-devel
