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

[Sannu K <sannumail4foss@xxxxxxxxx>]

On Thu, Jan 16, 2014 at 1:14 PM, Peter Teoh <htmldeveloper@xxxxxxxxx> wrote:

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

:

Thanks. I was trying to find out a generic way to access the scan out buffer. The page flip functions looks specific to hardware.
 

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)

--
Regards,
Peter Teoh

It is enough to have a way to get the content of scan out buffer instead of accessing it directly using a pointer.

Thanks for you help,

Sannu K

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