4a60312011
By default, vt(4) gets the "preferred mode" from DRM, when using a DRM
video driver as its backend. The preferred mode is usually the native
screen resolution.
Now, if this mode isn't appropriate, a user can use loader tunables to
select a mode. The tunables are read in the following order:
1. kern.vt.fb.modes.$connector_name
2. kern.vt.fb.default_mode
For example, to set a 1024x768 mode, no matter the connector:
kern.vt.fb.default_mode="1024x768"
To set a 800x600 mode only on the laptop builtin screen:
kern.vt.fb.modes.LVDS-1="800x600"
MFC after: 1 week
127 lines
4.2 KiB
C
127 lines
4.2 KiB
C
/*
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* Copyright (c) 2006-2009 Red Hat Inc.
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* Copyright (c) 2006-2008 Intel Corporation
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* Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
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*
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* DRM framebuffer helper functions
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*
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* Authors:
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* Dave Airlie <airlied@linux.ie>
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* Jesse Barnes <jesse.barnes@intel.com>
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*
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* $FreeBSD$
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*/
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#ifndef DRM_FB_HELPER_H
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#define DRM_FB_HELPER_H
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struct drm_fb_helper;
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struct drm_fb_helper_crtc {
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uint32_t crtc_id;
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struct drm_mode_set mode_set;
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struct drm_display_mode *desired_mode;
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};
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struct drm_fb_helper_surface_size {
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u32 fb_width;
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u32 fb_height;
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u32 surface_width;
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u32 surface_height;
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u32 surface_bpp;
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u32 surface_depth;
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};
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struct drm_fb_helper_funcs {
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void (*gamma_set)(struct drm_crtc *crtc, u16 red, u16 green,
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u16 blue, int regno);
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void (*gamma_get)(struct drm_crtc *crtc, u16 *red, u16 *green,
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u16 *blue, int regno);
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int (*fb_probe)(struct drm_fb_helper *helper,
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struct drm_fb_helper_surface_size *sizes);
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};
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struct drm_fb_helper_connector {
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struct drm_connector *connector;
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struct drm_cmdline_mode cmdline_mode;
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};
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struct drm_fb_helper {
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struct drm_framebuffer *fb;
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struct drm_framebuffer *saved_fb;
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struct drm_device *dev;
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struct drm_display_mode *mode;
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int crtc_count;
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struct drm_fb_helper_crtc *crtc_info;
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int connector_count;
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struct drm_fb_helper_connector **connector_info;
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struct drm_fb_helper_funcs *funcs;
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int conn_limit;
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struct fb_info *fbdev;
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u32 pseudo_palette[17];
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struct list_head kernel_fb_list;
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/* we got a hotplug but fbdev wasn't running the console
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delay until next set_par */
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bool delayed_hotplug;
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};
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struct fb_var_screeninfo;
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struct fb_cmap;
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int drm_fb_helper_single_fb_probe(struct drm_fb_helper *helper,
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int preferred_bpp);
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int drm_fb_helper_init(struct drm_device *dev,
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struct drm_fb_helper *helper, int crtc_count,
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int max_conn);
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void drm_fb_helper_fini(struct drm_fb_helper *helper);
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int drm_fb_helper_blank(int blank, struct fb_info *info);
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int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
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struct fb_info *info);
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int drm_fb_helper_set_par(struct fb_info *info);
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int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
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struct fb_info *info);
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int drm_fb_helper_setcolreg(unsigned regno,
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unsigned red,
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unsigned green,
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unsigned blue,
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unsigned transp,
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struct fb_info *info);
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bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper);
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void drm_fb_helper_restore(void);
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void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
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uint32_t fb_width, uint32_t fb_height);
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void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
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uint32_t depth);
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int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info);
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int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper);
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bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel);
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int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper);
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int drm_fb_helper_debug_enter(struct fb_info *info);
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int drm_fb_helper_debug_leave(struct fb_info *info);
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bool drm_fb_helper_force_kernel_mode(void);
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#endif
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