drivers/video/omap2/omapfb/omapfb.h

   1 /*
   2  * linux/drivers/video/omap2/omapfb.h
   3  *
   4  * Copyright (C) 2008 Nokia Corporation
   5  * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
   6  *
   7  * Some code and ideas taken from drivers/video/omap/ driver
   8  * by Imre Deak.
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License version 2 as published by
  12  * the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but WITHOUT
  15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  17  * more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along with
  20  * this program.  If not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23 #ifndef __DRIVERS_VIDEO_OMAP2_OMAPFB_H__
  24 #define __DRIVERS_VIDEO_OMAP2_OMAPFB_H__
  25
  26 #ifdef CONFIG_FB_OMAP2_DEBUG_SUPPORT
  27 #define DEBUG
  28 #endif
  29
  30 #include <linux/rwsem.h>
  31
  32 #include <video/omapdss.h>
  33
  34 #ifdef DEBUG
  35 extern unsigned int omapfb_debug;
  36 #define DBG(format, ...) \
  37         if (omapfb_debug) \
  38                 printk(KERN_DEBUG "OMAPFB: " format, ## __VA_ARGS__)
  39 #else
  40 #define DBG(format, ...)
  41 #endif
  42
  43 #define FB2OFB(fb_info) ((struct omapfb_info *)(fb_info->par))
  44
  45 /* max number of overlays to which a framebuffer data can be direct */
  46 #define OMAPFB_MAX_OVL_PER_FB 3
  47
  48 struct omapfb2_mem_region {
  49         int             id;
  50         u32             paddr;
  51         void __iomem    *vaddr;
  52         struct vrfb     vrfb;
  53         unsigned long   size;
  54         u8              type;           /* OMAPFB_PLANE_MEM_* */
  55         bool            alloc;          /* allocated by the driver */
  56         bool            map;            /* kernel mapped by the driver */
  57         atomic_t        map_count;
  58         struct rw_semaphore lock;
  59         atomic_t        lock_count;
  60 };
  61
  62 /* appended to fb_info */
  63 struct omapfb_info {
  64         int id;
  65         struct omapfb2_mem_region *region;
  66         int num_overlays;
  67         struct omap_overlay *overlays[OMAPFB_MAX_OVL_PER_FB];
  68         struct omapfb2_device *fbdev;
  69         enum omap_dss_rotation_type rotation_type;
  70         u8 rotation[OMAPFB_MAX_OVL_PER_FB];
  71         bool mirror;
  72 };
  73
  74 struct omapfb2_device {
  75         struct device *dev;
  76         struct mutex  mtx;
  77
  78         u32 pseudo_palette[17];
  79
  80         int state;
  81
  82         unsigned num_fbs;
  83         struct fb_info *fbs[10];
  84         struct omapfb2_mem_region regions[10];
  85
  86         unsigned num_displays;
  87         struct omap_dss_device *displays[10];
  88         unsigned num_overlays;
  89         struct omap_overlay *overlays[10];
  90         unsigned num_managers;
  91         struct omap_overlay_manager *managers[10];
  92
  93         unsigned num_bpp_overrides;
  94         struct {
  95                 struct omap_dss_device *dssdev;
  96                 u8 bpp;
  97         } bpp_overrides[10];
  98 };
  99
 100 struct omapfb_colormode {
 101         enum omap_color_mode dssmode;
 102         u32 bits_per_pixel;
 103         u32 nonstd;
 104         struct fb_bitfield red;
 105         struct fb_bitfield green;
 106         struct fb_bitfield blue;
 107         struct fb_bitfield transp;
 108 };
 109
 110 void set_fb_fix(struct fb_info *fbi);
 111 int check_fb_var(struct fb_info *fbi, struct fb_var_screeninfo *var);
 112 int omapfb_realloc_fbmem(struct fb_info *fbi, unsigned long size, int type);
 113 int omapfb_apply_changes(struct fb_info *fbi, int init);
 114
 115 int omapfb_create_sysfs(struct omapfb2_device *fbdev);
 116 void omapfb_remove_sysfs(struct omapfb2_device *fbdev);
 117
 118 int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd, unsigned long arg);
 119
 120 int omapfb_update_window(struct fb_info *fbi,
 121                 u32 x, u32 y, u32 w, u32 h);
 122
 123 int dss_mode_to_fb_mode(enum omap_color_mode dssmode,
 124                         struct fb_var_screeninfo *var);
 125
 126 int omapfb_setup_overlay(struct fb_info *fbi, struct omap_overlay *ovl,
 127                 u16 posx, u16 posy, u16 outw, u16 outh);
 128
 129 /* find the display connected to this fb, if any */
 130 static inline struct omap_dss_device *fb2display(struct fb_info *fbi)
 131 {
 132         struct omapfb_info *ofbi = FB2OFB(fbi);
 133         int i;
 134
 135         /* XXX: returns the display connected to first attached overlay */
 136         for (i = 0; i < ofbi->num_overlays; i++) {
 137                 if (ofbi->overlays[i]->manager)
 138                         return ofbi->overlays[i]->manager->device;
 139         }
 140
 141         return NULL;
 142 }
 143
 144 static inline void omapfb_lock(struct omapfb2_device *fbdev)
 145 {
 146         mutex_lock(&fbdev->mtx);
 147 }
 148
 149 static inline void omapfb_unlock(struct omapfb2_device *fbdev)
 150 {
 151         mutex_unlock(&fbdev->mtx);
 152 }
 153
 154 static inline int omapfb_overlay_enable(struct omap_overlay *ovl,
 155                 int enable)
 156 {
 157         struct omap_overlay_info info;
 158
 159         ovl->get_overlay_info(ovl, &info);
 160         if (info.enabled == enable)
 161                 return 0;
 162         info.enabled = enable;
 163         return ovl->set_overlay_info(ovl, &info);
 164 }
 165
 166 static inline struct omapfb2_mem_region *
 167 omapfb_get_mem_region(struct omapfb2_mem_region *rg)
 168 {
 169         down_read_nested(&rg->lock, rg->id);
 170         atomic_inc(&rg->lock_count);
 171         return rg;
 172 }
 173
 174 static inline void omapfb_put_mem_region(struct omapfb2_mem_region *rg)
 175 {
 176         atomic_dec(&rg->lock_count);
 177         up_read(&rg->lock);
 178 }
 179
 180 #endif