drm_fb_helper_initial_config(9) [centos man page]

DRM_FB_HELPER_INITIA(9) 					   DRM Internals					   DRM_FB_HELPER_INITIA(9)

NAME

       drm_fb_helper_initial_config - setup a sane initial connector configuration

SYNOPSIS

       bool drm_fb_helper_initial_config(struct drm_fb_helper * fb_helper, int bpp_sel);

ARGUMENTS

       fb_helper
	   fb_helper device struct

       bpp_sel
	   bpp value to use for the framebuffer configuration

DESCRIPTION

       Scans the CRTCs and connectors and tries to put together an initial setup. At the moment, this is a cloned configuration across all heads
       with a new framebuffer object as the backing store.

       Note that this also registers the fbdev and so allows userspace to call into the driver through the fbdev interfaces.

       This function will call down into the ->fb_probe callback to let the driver allocate and initialize the fbdev info structure and the drm
       framebuffer used to back the fbdev.  drm_fb_helper_fill_var and drm_fb_helper_fill_fix are provided as helpers to setup simple default
       values for the fbdev info structure.

RETURNS

       Zero if everything went ok, nonzero 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_FB_HELPER_INITIA(9)

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)