On Mon, 2012-05-14 at 12:56 -0600, Dan Walkes wrote: > > I?m working on a project to implement a color transformation of all > pixels in the framebuffer.
That sounds like the per CRTC colour lookup table might fit the bill. Grep for crtc_lut in drivers/gpu/drm/drm_crtc.c. > I?ve found drm_mode_dirtyfb_ioctl is one ioctl which seems to be > invoked whenever the display changes (as I move the mouse across the > screen, start applications, etc) however I don?t see this method when > I attempt to play a video with mplayer. Based on my research I had > expected video to use overlay buffers, however I also don?t see calls > to overlay ioctls like vmw_overlay_ioctl, vmw_stream_*_ioctl. These ioctls are only used by the vmwgfx drivers, which only support the virtual GPU available in VMware hypervisors. > I see references to the scanout buffer in drm_irq and intel_display > within drm source, as well as in the documentation at > http://www.kernel.org/doc/htmldocs/drm/ch02s05.html but I?m having a > hard time figuring out where the scanout buffer actually *is*. If I > could understand the relationship between the framebuffer and scanout > buffer better I could probably use this to figure out where I?d need > to add my transform. They're generally one and the same thing. -- Earthling Michel D?nzer | http://www.amd.com Libre software enthusiast | Debian, X and DRI developer
