diff options
Diffstat (limited to 'include/drm/drm_fb_helper.h')
| -rw-r--r-- | include/drm/drm_fb_helper.h | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h new file mode 100644 index 000000000..0dfd94def --- /dev/null +++ b/include/drm/drm_fb_helper.h @@ -0,0 +1,161 @@ +/* + * Copyright (c) 2006-2009 Red Hat Inc. + * Copyright (c) 2006-2008 Intel Corporation + * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> + * + * DRM framebuffer helper functions + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting documentation, and + * that the name of the copyright holders not be used in advertising or + * publicity pertaining to distribution of the software without specific, + * written prior permission. The copyright holders make no representations + * about the suitability of this software for any purpose. It is provided "as + * is" without express or implied warranty. + * + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE + * OF THIS SOFTWARE. + * + * Authors: + * Dave Airlie <airlied@linux.ie> + * Jesse Barnes <jesse.barnes@intel.com> + */ +#ifndef DRM_FB_HELPER_H +#define DRM_FB_HELPER_H + +struct drm_fb_helper; + +#include <linux/kgdb.h> + +struct drm_fb_offset { + int x, y; +}; + +struct drm_fb_helper_crtc { + struct drm_mode_set mode_set; + struct drm_display_mode *desired_mode; + int x, y; +}; + +/** + * struct drm_fb_helper_surface_size - describes fbdev size and scanout surface size + * @fb_width: fbdev width + * @fb_height: fbdev height + * @surface_width: scanout buffer width + * @surface_height: scanout buffer height + * @surface_bpp: scanout buffer bpp + * @surface_depth: scanout buffer depth + * + * Note that the scanout surface width/height may be larger than the fbdev + * width/height. In case of multiple displays, the scanout surface is sized + * according to the largest width/height (so it is large enough for all CRTCs + * to scanout). But the fbdev width/height is sized to the minimum width/ + * height of all the displays. This ensures that fbcon fits on the smallest + * of the attached displays. + * + * So what is passed to drm_fb_helper_fill_var() should be fb_width/fb_height, + * rather than the surface size. + */ +struct drm_fb_helper_surface_size { + u32 fb_width; + u32 fb_height; + u32 surface_width; + u32 surface_height; + u32 surface_bpp; + u32 surface_depth; +}; + +/** + * struct drm_fb_helper_funcs - driver callbacks for the fbdev emulation library + * @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. Furthermore it also needs to allocate the drm + * framebuffer used to back the fbdev. + * @initial_config: Setup an initial fbdev display configuration + * + * Driver callbacks used by the fbdev emulation helper library. + */ +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, + struct drm_fb_offset *offsets, + bool *enabled, int width, int height); +}; + +struct drm_fb_helper_connector { + struct drm_connector *connector; +}; + +struct drm_fb_helper { + struct drm_framebuffer *fb; + struct drm_device *dev; + int crtc_count; + struct drm_fb_helper_crtc *crtc_info; + int connector_count; + int connector_info_alloc_count; + struct drm_fb_helper_connector **connector_info; + const struct drm_fb_helper_funcs *funcs; + struct fb_info *fbdev; + u32 pseudo_palette[17]; + struct list_head kernel_fb_list; + + /* we got a hotplug but fbdev wasn't running the console + delay until next set_par */ + bool delayed_hotplug; +}; + +void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper, + const struct drm_fb_helper_funcs *funcs); +int drm_fb_helper_init(struct drm_device *dev, + struct drm_fb_helper *helper, int crtc_count, + int max_conn); +void drm_fb_helper_fini(struct drm_fb_helper *helper); +int drm_fb_helper_blank(int blank, struct fb_info *info); +int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, + struct fb_info *info); +int drm_fb_helper_set_par(struct fb_info *info); +int drm_fb_helper_check_var(struct fb_var_screeninfo *var, + struct fb_info *info); + +bool drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper); +void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, + uint32_t fb_width, uint32_t fb_height); +void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, + uint32_t depth); + +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); +int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel); +int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper); +int drm_fb_helper_debug_enter(struct fb_info *info); +int drm_fb_helper_debug_leave(struct fb_info *info); +struct drm_display_mode * +drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, + int width, int height); +struct drm_display_mode * +drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, + int width, int height); + +int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector); +int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, + struct drm_connector *connector); +#endif |