drm_crtc_helper_set_mode(9) [centos man page]

DRM_CRTC_HELPER_SET_(9) 					   DRM Internals					   DRM_CRTC_HELPER_SET_(9)

NAME

       drm_crtc_helper_set_mode - internal helper to set a mode

SYNOPSIS

       bool drm_crtc_helper_set_mode(struct drm_crtc * crtc, struct drm_display_mode * mode, int x, int y, struct drm_framebuffer * old_fb);

ARGUMENTS

       crtc
	   CRTC to program

       mode
	   mode to use

       x
	   horizontal offset into the surface

       y
	   vertical offset into the surface

       old_fb
	   old framebuffer, for cleanup

LOCKING

       Caller must hold mode config lock.

       Try to set mode on crtc. Give crtc and its associated connectors a chance to fixup or reject the mode prior to trying to set it. This is an
       internal helper that drivers could e.g. use to update properties that require the entire output pipe to be disabled and re-enabled in a new
       configuration. For example for changing whether audio is enabled on a hdmi link or for changing panel fitter or dither attributes. It is
       also called by the drm_crtc_helper_set_config helper function to drive the mode setting sequence.

RETURNS

       True if the mode was set successfully, or false otherwise.

AUTHORS

       Jesse Barnes <jesse.barnes@intel.com>
       Intel Corporation,
	   Initial version

       Laurent Pinchart <laurent.pinchart@ideasonboard.com>
       Ideas on board SPRL,
	   Driver internals

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						   DRM_CRTC_HELPER_SET_(9)

STRUCT 
DRM_FB_HELPER(9) 					   DRM Internals					   STRUCT DRM_FB_HELPER(9)

NAME

       struct_drm_fb_helper_funcs - driver callbacks for the fbdev emulation library

SYNOPSIS

       struct drm_fb_helper_funcs {
	 void (* gamma_set) (struct drm_crtc *crtc, u16 red, u16 green,u16 blue, int regno);
	 void (* gamma_get) (struct drm_crtc *crtc, u16 *red, u16 *green,u16 *blue, int regno);
	 int (* fb_probe) (struct drm_fb_helper *helper,struct drm_fb_helper_surface_size *sizes);
	 bool (* initial_config) (struct drm_fb_helper *fb_helper,struct drm_fb_helper_crtc **crtcs,struct drm_display_mode **modes,bool *enabled, int width, int height);
       };

MEMBERS

       gamma_set
	   Set the given gamma lut register on the given crtc.

       gamma_get
	   Read the given gamma lut register on the given crtc, used to save the current lut when force-restoring the fbdev for e.g. kdbg.

       fb_probe
	   Driver callback to allocate and initialize the fbdev info structure. Futhermore it also needs to allocate the drm framebuffer used to
	   back the fbdev.

       initial_config
	   Setup an initial fbdev display configuration

DESCRIPTION

       Driver callbacks used by the fbdev emulation helper library.

AUTHORS

       Jesse Barnes <jesse.barnes@intel.com>
       Intel Corporation,
	   Initial version

       Laurent Pinchart <laurent.pinchart@ideasonboard.com>
       Ideas on board SPRL,
	   Driver internals

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						   STRUCT DRM_FB_HELPER(9)