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drm: Add drm_device->fb_helper pointer

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drm_fb_helper is *the* way of doing fbdev emulation so add a pointer to
struct drm_device. This makes it possible to add callback helpers for
.last_close and .output_poll_changed further reducing fbdev emulation
footprint in drivers. The pointer is set by drm_fb_helper_init() and
cleared by drm_fb_helper_fini().

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20171030153951.56269-3-noralf@tronnes.org
This commit is contained in:
Noralf Trønnes 2017-10-30 16:39:38 +01:00
parent c777990fb4
commit 29ad20b22c
2 changed files with 20 additions and 2 deletions
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13
drivers/gpu/drm/drm_fb_helper.c
View File

@ -799,8 +799,10 @@ int drm_fb_helper_init(struct drm_device *dev,
struct drm_mode_config *config = &dev->mode_config; struct drm_mode_config *config = &dev->mode_config;
int i; int i;
if (!drm_fbdev_emulation) if (!drm_fbdev_emulation) {
dev->fb_helper = fb_helper;
return 0; return 0;
}
if (!max_conn_count) if (!max_conn_count)
return -EINVAL; return -EINVAL;
@ -835,6 +837,8 @@ int drm_fb_helper_init(struct drm_device *dev,
i++; i++;
} }
dev->fb_helper = fb_helper;
return 0; return 0;
out_free: out_free:
drm_fb_helper_crtc_free(fb_helper); drm_fb_helper_crtc_free(fb_helper);
@ -913,7 +917,12 @@ void drm_fb_helper_fini(struct drm_fb_helper *fb_helper)
{ {
struct fb_info *info; struct fb_info *info;
if (!drm_fbdev_emulation || !fb_helper) if (!fb_helper)
return;
fb_helper->dev->fb_helper = NULL;
if (!drm_fbdev_emulation)
return; return;
cancel_work_sync(&fb_helper->resume_work); cancel_work_sync(&fb_helper->resume_work);

9
include/drm/drm_device.h
View File

@ -17,6 +17,7 @@ struct drm_vblank_crtc;
struct drm_sg_mem; struct drm_sg_mem;
struct drm_local_map; struct drm_local_map;
struct drm_vma_offset_manager; struct drm_vma_offset_manager;
struct drm_fb_helper;
struct inode; struct inode;
@ -185,6 +186,14 @@ struct drm_device {
struct drm_vma_offset_manager *vma_offset_manager; struct drm_vma_offset_manager *vma_offset_manager;
/*@} */ /*@} */
int switch_power_state; int switch_power_state;
/**
* @fb_helper:
*
* Pointer to the fbdev emulation structure.
* Set by drm_fb_helper_init() and cleared by drm_fb_helper_fini().
*/
struct drm_fb_helper *fb_helper;
}; };
#endif #endif