<div dir="ltr">In general how it worked is explained here:<div><br></div><div><a href="https://www.kernel.org/doc/htmldocs/drm/drm-kms-init.html" target="_blank">https://www.kernel.org/doc/htmldocs/drm/drm-kms-init.html</a><br>
</div><div><div><br></div><div>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</div><div>
:<br></div><div><br></div><div><br></div><div><div>static void do_intel_finish_page_flip(struct drm_device *dev,<br></div><div>void intel_finish_page_flip(struct drm_device *dev, int pipe)</div><div><span style="white-space:pre-wrap"> </span>do_intel_finish_page_flip(dev, crtc);</div>
<div>void intel_finish_page_flip_plane(struct drm_device *dev, int plane)</div><div><span style="white-space:pre-wrap"> </span>do_intel_finish_page_flip(dev, crtc);</div><div>void intel_prepare_page_flip(struct drm_device *dev, int plane)</div>
<div><span style="white-space:pre-wrap"> </span> * is also accompanied by a spurious intel_prepare_page_flip().</div><div>inline static void intel_mark_page_flip_active(struct intel_crtc *intel_crtc)</div><div><br></div>
</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Jan 11, 2014 at 9:27 PM, Sannu K <span dir="ltr"><<a href="mailto:sannumail4foss@gmail.com" target="_blank">sannumail4foss@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div>Hi,<br><br>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.<br>
<br></div>Thanks and Regards,<br></div>Sannu K<br></div>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br>Regards,<br>Peter Teoh
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