SYNOPSIS

int drm_primary_helper_update(struct drm_plane * plane, struct drm_crtc * crtc, struct drm_framebuffer * fb, int crtc_x, int crtc_y, unsigned int crtc_w, unsigned int crtc_h, uint32_t src_x, uint32_t src_y, uint32_t src_w, uint32_t src_h);

ARGUMENTS

plane

plane object to update

crtc

owning CRTC of owning plane

fb

framebuffer to flip onto plane

crtc_x

x offset of primary plane on crtc

crtc_y

y offset of primary plane on crtc

crtc_w

width of primary plane rectangle on crtc

crtc_h

height of primary plane rectangle on crtc

src_x

x offset of fb for panning

src_y

y offset of fb for panning

src_w

width of source rectangle in fb

src_h

height of source rectangle in fb

DESCRIPTION

Provides a default plane update handler for primary planes. This is handler is called in response to a userspace SetPlane operation on the plane with a non-NULL framebuffer. We call the driver's modeset handler to update the framebuffer.

SetPlane on a primary plane of a disabled CRTC is not supported, and will return an error.

Note that we make some assumptions about hardware limitations that may not be true for all hardware -- 1) Primary plane cannot be repositioned. 2) Primary plane cannot be scaled. 3) Primary plane must cover the entire CRTC. 4) Subpixel positioning is not supported. Drivers for hardware that don't have these restrictions can provide their own implementation rather than using this helper.

RETURNS

Zero on success, error code on failure

AUTHORS

Jesse Barnes <[email protected]>
Intel Corporation,         
        

Initial version

Laurent Pinchart <[email protected]>
Ideas on board SPRL,         
        

Driver internals

Daniel Vetter <[email protected]>
Intel Corporation,         
        

Contributions all over the place

Lukas Wunner <[email protected]>

vga_switcheroo documentation

COPYRIGHT