include/drm/drm_modes.h

   1 /*
   2  * Copyright © 2006 Keith Packard
   3  * Copyright © 2007-2008 Dave Airlie
   4  * Copyright © 2007-2008 Intel Corporation
   5  *   Jesse Barnes <jesse.barnes@intel.com>
   6  * Copyright © 2014 Intel Corporation
   7  *   Daniel Vetter <daniel.vetter@ffwll.ch>
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included in
  17  * all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  23  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  24  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  25  * OTHER DEALINGS IN THE SOFTWARE.
  26  */
  27 #ifndef __DRM_MODES_H__
  28 #define __DRM_MODES_H__
  29
  30 /*
  31  * Note on terminology:  here, for brevity and convenience, we refer to connector
  32  * control chips as 'CRTCs'.  They can control any type of connector, VGA, LVDS,
  33  * DVI, etc.  And 'screen' refers to the whole of the visible display, which
  34  * may span multiple monitors (and therefore multiple CRTC and connector
  35  * structures).
  36  */
  37
  38 enum drm_mode_status {
  39     MODE_OK     = 0,    /* Mode OK */
  40     MODE_HSYNC,         /* hsync out of range */
  41     MODE_VSYNC,         /* vsync out of range */
  42     MODE_H_ILLEGAL,     /* mode has illegal horizontal timings */
  43     MODE_V_ILLEGAL,     /* mode has illegal horizontal timings */
  44     MODE_BAD_WIDTH,     /* requires an unsupported linepitch */
  45     MODE_NOMODE,        /* no mode with a matching name */
  46     MODE_NO_INTERLACE,  /* interlaced mode not supported */
  47     MODE_NO_DBLESCAN,   /* doublescan mode not supported */
  48     MODE_NO_VSCAN,      /* multiscan mode not supported */
  49     MODE_MEM,           /* insufficient video memory */
  50     MODE_VIRTUAL_X,     /* mode width too large for specified virtual size */
  51     MODE_VIRTUAL_Y,     /* mode height too large for specified virtual size */
  52     MODE_MEM_VIRT,      /* insufficient video memory given virtual size */
  53     MODE_NOCLOCK,       /* no fixed clock available */
  54     MODE_CLOCK_HIGH,    /* clock required is too high */
  55     MODE_CLOCK_LOW,     /* clock required is too low */
  56     MODE_CLOCK_RANGE,   /* clock/mode isn't in a ClockRange */
  57     MODE_BAD_HVALUE,    /* horizontal timing was out of range */
  58     MODE_BAD_VVALUE,    /* vertical timing was out of range */
  59     MODE_BAD_VSCAN,     /* VScan value out of range */
  60     MODE_HSYNC_NARROW,  /* horizontal sync too narrow */
  61     MODE_HSYNC_WIDE,    /* horizontal sync too wide */
  62     MODE_HBLANK_NARROW, /* horizontal blanking too narrow */
  63     MODE_HBLANK_WIDE,   /* horizontal blanking too wide */
  64     MODE_VSYNC_NARROW,  /* vertical sync too narrow */
  65     MODE_VSYNC_WIDE,    /* vertical sync too wide */
  66     MODE_VBLANK_NARROW, /* vertical blanking too narrow */
  67     MODE_VBLANK_WIDE,   /* vertical blanking too wide */
  68     MODE_PANEL,         /* exceeds panel dimensions */
  69     MODE_INTERLACE_WIDTH, /* width too large for interlaced mode */
  70     MODE_ONE_WIDTH,     /* only one width is supported */
  71     MODE_ONE_HEIGHT,    /* only one height is supported */
  72     MODE_ONE_SIZE,      /* only one resolution is supported */
  73     MODE_NO_REDUCED,    /* monitor doesn't accept reduced blanking */
  74     MODE_NO_STEREO,     /* stereo modes not supported */
  75     MODE_UNVERIFIED = -3, /* mode needs to reverified */
  76     MODE_BAD = -2,      /* unspecified reason */
  77     MODE_ERROR  = -1    /* error condition */
  78 };
  79
  80 #define DRM_MODE_TYPE_CLOCK_CRTC_C (DRM_MODE_TYPE_CLOCK_C | \
  81                                     DRM_MODE_TYPE_CRTC_C)
  82
  83 #define DRM_MODE(nm, t, c, hd, hss, hse, ht, hsk, vd, vss, vse, vt, vs, f) \
  84         .name = nm, .status = 0, .type = (t), .clock = (c), \
  85         .hdisplay = (hd), .hsync_start = (hss), .hsync_end = (hse), \
  86         .htotal = (ht), .hskew = (hsk), .vdisplay = (vd), \
  87         .vsync_start = (vss), .vsync_end = (vse), .vtotal = (vt), \
  88         .vscan = (vs), .flags = (f), \
  89         .base.type = DRM_MODE_OBJECT_MODE
  90
  91 #define CRTC_INTERLACE_HALVE_V  (1 << 0) /* halve V values for interlacing */
  92 #define CRTC_STEREO_DOUBLE      (1 << 1) /* adjust timings for stereo modes */
  93 #define CRTC_NO_DBLSCAN         (1 << 2) /* don't adjust doublescan */
  94 #define CRTC_NO_VSCAN           (1 << 3) /* don't adjust doublescan */
  95 #define CRTC_STEREO_DOUBLE_ONLY (CRTC_STEREO_DOUBLE | CRTC_NO_DBLSCAN | CRTC_NO_VSCAN)
  96
  97 #define DRM_MODE_FLAG_3D_MAX    DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF
  98
  99 struct drm_display_mode {
 100         /* Header */
 101         struct list_head head;
 102         struct drm_mode_object base;
 103
 104         char name[DRM_DISPLAY_MODE_LEN];
 105
 106         enum drm_mode_status status;
 107         unsigned int type;
 108
 109         /* Proposed mode values */
 110         int clock;              /* in kHz */
 111         int hdisplay;
 112         int hsync_start;
 113         int hsync_end;
 114         int htotal;
 115         int hskew;
 116         int vdisplay;
 117         int vsync_start;
 118         int vsync_end;
 119         int vtotal;
 120         int vscan;
 121         unsigned int flags;
 122
 123         /* Addressable image size (may be 0 for projectors, etc.) */
 124         int width_mm;
 125         int height_mm;
 126
 127         /* Actual mode we give to hw */
 128         int crtc_clock;         /* in KHz */
 129         int crtc_hdisplay;
 130         int crtc_hblank_start;
 131         int crtc_hblank_end;
 132         int crtc_hsync_start;
 133         int crtc_hsync_end;
 134         int crtc_htotal;
 135         int crtc_hskew;
 136         int crtc_vdisplay;
 137         int crtc_vblank_start;
 138         int crtc_vblank_end;
 139         int crtc_vsync_start;
 140         int crtc_vsync_end;
 141         int crtc_vtotal;
 142
 143         /* Driver private mode info */
 144         int *private;
 145         int private_flags;
 146
 147         int vrefresh;           /* in Hz */
 148         int hsync;              /* in kHz */
 149         enum hdmi_picture_aspect picture_aspect_ratio;
 150 };
 151
 152 /* mode specified on the command line */
 153 struct drm_cmdline_mode {
 154         bool specified;
 155         bool refresh_specified;
 156         bool bpp_specified;
 157         int xres, yres;
 158         int bpp;
 159         int refresh;
 160         bool rb;
 161         bool interlace;
 162         bool cvt;
 163         bool margins;
 164         enum drm_connector_force force;
 165 };
 166
 167 /**
 168  * drm_mode_is_stereo - check for stereo mode flags
 169  * @mode: drm_display_mode to check
 170  *
 171  * Returns:
 172  * True if the mode is one of the stereo modes (like side-by-side), false if
 173  * not.
 174  */
 175 static inline bool drm_mode_is_stereo(const struct drm_display_mode *mode)
 176 {
 177         return mode->flags & DRM_MODE_FLAG_3D_MASK;
 178 }
 179
 180 struct drm_connector;
 181 struct drm_cmdline_mode;
 182
 183 struct drm_display_mode *drm_mode_create(struct drm_device *dev);
 184 void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode);
 185 void drm_mode_probed_add(struct drm_connector *connector, struct drm_display_mode *mode);
 186 void drm_mode_debug_printmodeline(const struct drm_display_mode *mode);
 187
 188 struct drm_display_mode *drm_cvt_mode(struct drm_device *dev,
 189                                       int hdisplay, int vdisplay, int vrefresh,
 190                                       bool reduced, bool interlaced,
 191                                       bool margins);
 192 struct drm_display_mode *drm_gtf_mode(struct drm_device *dev,
 193                                       int hdisplay, int vdisplay, int vrefresh,
 194                                       bool interlaced, int margins);
 195 struct drm_display_mode *drm_gtf_mode_complex(struct drm_device *dev,
 196                                               int hdisplay, int vdisplay,
 197                                               int vrefresh, bool interlaced,
 198                                               int margins,
 199                                               int GTF_M, int GTF_2C,
 200                                               int GTF_K, int GTF_2J);
 201 void drm_display_mode_from_videomode(const struct videomode *vm,
 202                                      struct drm_display_mode *dmode);
 203 void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
 204                                    struct videomode *vm);
 205 int of_get_drm_display_mode(struct device_node *np,
 206                             struct drm_display_mode *dmode,
 207                             int index);
 208
 209 void drm_mode_set_name(struct drm_display_mode *mode);
 210 int drm_mode_hsync(const struct drm_display_mode *mode);
 211 int drm_mode_vrefresh(const struct drm_display_mode *mode);
 212
 213 void drm_mode_set_crtcinfo(struct drm_display_mode *p,
 214                            int adjust_flags);
 215 void drm_mode_copy(struct drm_display_mode *dst,
 216                    const struct drm_display_mode *src);
 217 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
 218                                             const struct drm_display_mode *mode);
 219 bool drm_mode_equal(const struct drm_display_mode *mode1,
 220                     const struct drm_display_mode *mode2);
 221 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1,
 222                                         const struct drm_display_mode *mode2);
 223
 224 /* for use by the crtc helper probe functions */
 225 enum drm_mode_status drm_mode_validate_basic(const struct drm_display_mode *mode);
 226 enum drm_mode_status drm_mode_validate_size(const struct drm_display_mode *mode,
 227                                             int maxX, int maxY);
 228 void drm_mode_prune_invalid(struct drm_device *dev,
 229                             struct list_head *mode_list, bool verbose);
 230 void drm_mode_sort(struct list_head *mode_list);
 231 void drm_mode_connector_list_update(struct drm_connector *connector, bool merge_type_bits);
 232
 233 /* parsing cmdline modes */
 234 bool
 235 drm_mode_parse_command_line_for_connector(const char *mode_option,
 236                                           struct drm_connector *connector,
 237                                           struct drm_cmdline_mode *mode);
 238 struct drm_display_mode *
 239 drm_mode_create_from_cmdline_mode(struct drm_device *dev,
 240                                   struct drm_cmdline_mode *cmd);
 241
 242 #endif /* __DRM_MODES_H__ */