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Commit 47074ab7 authored by Archit Taneja's avatar Archit Taneja Committed by Daniel Vetter
Browse files

drm/fb_helper: Create a wrapper for unlink_framebuffer 



Some drm drivers call unlink_framebuffer. Create a drm_fb_helper function
that wraps around these calls.

This is part of an effort to prevent drm drivers from calling fbdev
functions directly, in order to make fbdev emulation a top level drm
option.

v2:
- Added kerneldocs
- Added a check for non-NULL fb_helper before proceeding. This will
  make the helpers work when we have a module param for fbdev emulation

Signed-off-by: default avatarArchit Taneja <architt@codeaurora.org>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent b8017d6c

drivers/gpu/drm/drm_fb_helper.c

+13 −0
Original line number Diff line number Diff line
@@ -748,6 +748,19 @@ void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) 
}

EXPORT_SYMBOL(drm_fb_helper_fini);



/**

 * drm_fb_helper_unlink_fbi - wrapper around unlink_framebuffer

 * @fb_helper: driver-allocated fbdev helper

 *

 * A wrapper around unlink_framebuffer implemented by fbdev core

 */

void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper)

{

	if (fb_helper && fb_helper->fbdev)

		unlink_framebuffer(fb_helper->fbdev);

}

EXPORT_SYMBOL(drm_fb_helper_unlink_fbi);



static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,

		     u16 blue, u16 regno, struct fb_info *info)

{

include/drm/drm_fb_helper.h

+2 −0
Original line number Diff line number Diff line
@@ -145,6 +145,8 @@ void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helpe 
void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,

			    uint32_t depth);



void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper);



int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info);



int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper);