How to access a DRM CRTC's scan out buffer?

[Peter Teoh]

In general how it worked is explained here:

https://www.kernel.org/doc/htmldocs/drm/drm-kms-init.html

Not sure which is the name of your video card, but I think in general all
the page flip API should have access to the scan buffer (see link above).
For Intel these are possible APIs
:


static void do_intel_finish_page_flip(struct drm_device *dev,
void intel_finish_page_flip(struct drm_device *dev, int pipe)
do_intel_finish_page_flip(dev, crtc);
void intel_finish_page_flip_plane(struct drm_device *dev, int plane)
do_intel_finish_page_flip(dev, crtc);
void intel_prepare_page_flip(struct drm_device *dev, int plane)
 * is also accompanied by a spurious intel_prepare_page_flip().
inline static void intel_mark_page_flip_active(struct intel_crtc
*intel_crtc)


On Sat, Jan 11, 2014 at 9:27 PM, Sannu K <sannumail4foss at gmail.com> wrote:

> Hi,
>
> I would like to access a monitor's content in kernel mode. I tried but
> could not find a generic way to access CRTC's scan out buffer in kernel
> mode. I prefer to do it in kernel mode as an experiment. Any pointers will
> greatly help.
>
> Thanks and Regards,
> Sannu K
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
>


-- 
Regards,
Peter Teoh
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20140116/f6682c2f/attachment.html