struct drm_display_mode {
/**
* @clock:
*
* Pixel clock in kHz.
*/
int clock; /* in kHz */
u16 hdisplay;
u16 hsync_start;
u16 hsync_end;
u16 htotal;
u16 hskew;
u16 vdisplay;
u16 vsync_start;
u16 vsync_end;
u16 vtotal;
u16 vscan;
/**
* @flags:
*
* Sync and timing flags:
*
* - DRM_MODE_FLAG_PHSYNC: horizontal sync is active high.
* - DRM_MODE_FLAG_NHSYNC: horizontal sync is active low.
* - DRM_MODE_FLAG_PVSYNC: vertical sync is active high.
* - DRM_MODE_FLAG_NVSYNC: vertical sync is active low.
* - DRM_MODE_FLAG_INTERLACE: mode is interlaced.
* - DRM_MODE_FLAG_DBLSCAN: mode uses doublescan.
* - DRM_MODE_FLAG_CSYNC: mode uses composite sync.
* - DRM_MODE_FLAG_PCSYNC: composite sync is active high.
* - DRM_MODE_FLAG_NCSYNC: composite sync is active low.
* - DRM_MODE_FLAG_HSKEW: hskew provided (not used?).
* - DRM_MODE_FLAG_BCAST: <deprecated>
* - DRM_MODE_FLAG_PIXMUX: <deprecated>
* - DRM_MODE_FLAG_DBLCLK: double-clocked mode.
* - DRM_MODE_FLAG_CLKDIV2: half-clocked mode.
*
* Additionally there's flags to specify how 3D modes are packed:
*
* - DRM_MODE_FLAG_3D_NONE: normal, non-3D mode.
* - DRM_MODE_FLAG_3D_FRAME_PACKING: 2 full frames for left and right.
* - DRM_MODE_FLAG_3D_FIELD_ALTERNATIVE: interleaved like fields.
* - DRM_MODE_FLAG_3D_LINE_ALTERNATIVE: interleaved lines.
* - DRM_MODE_FLAG_3D_SIDE_BY_SIDE_FULL: side-by-side full frames.
* - DRM_MODE_FLAG_3D_L_DEPTH: ?
* - DRM_MODE_FLAG_3D_L_DEPTH_GFX_GFX_DEPTH: ?
* - DRM_MODE_FLAG_3D_TOP_AND_BOTTOM: frame split into top and bottom
* parts.
* - DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF: frame split into left and
* right parts.
*/
u32 flags;
/**
* @crtc_clock:
*
* Actual pixel or dot clock in the hardware. This differs from the
* logical @clock when e.g. using interlacing, double-clocking, stereo
* modes or other fancy stuff that changes the timings and signals
* actually sent over the wire.
*
* This is again in kHz.
*
* Note that with digital outputs like HDMI or DP there's usually a
* massive confusion between the dot clock and the signal clock at the
* bit encoding level. Especially when a 8b/10b encoding is used and the
* difference is exactly a factor of 10.
*/
int crtc_clock;
u16 crtc_hdisplay;
u16 crtc_hblank_start;
u16 crtc_hblank_end;
u16 crtc_hsync_start;
u16 crtc_hsync_end;
u16 crtc_htotal;
u16 crtc_hskew;
u16 crtc_vdisplay;
u16 crtc_vblank_start;
u16 crtc_vblank_end;
u16 crtc_vsync_start;
u16 crtc_vsync_end;
u16 crtc_vtotal;
/**
* @width_mm:
*
* Addressable size of the output in mm, projectors should set this to
* 0.
*/
u16 width_mm;
/**
* @height_mm:
*
* Addressable size of the output in mm, projectors should set this to
* 0.
*/
u16 height_mm;
/**
* @type:
*
* A bitmask of flags, mostly about the source of a mode. Possible flags
* are:
*
* - DRM_MODE_TYPE_PREFERRED: Preferred mode, usually the native
* resolution of an LCD panel. There should only be one preferred
* mode per connector at any given time.
* - DRM_MODE_TYPE_DRIVER: Mode created by the driver, which is all of
* them really. Drivers must set this bit for all modes they create
* and expose to userspace.
* - DRM_MODE_TYPE_USERDEF: Mode defined or selected via the kernel
* command line.
*
* Plus a big list of flags which shouldn't be used at all, but are
* still around since these flags are also used in the userspace ABI.
* We no longer accept modes with these types though:
*
* - DRM_MODE_TYPE_BUILTIN: Meant for hard-coded modes, unused.
* Use DRM_MODE_TYPE_DRIVER instead.
* - DRM_MODE_TYPE_DEFAULT: Again a leftover, use
* DRM_MODE_TYPE_PREFERRED instead.
* - DRM_MODE_TYPE_CLOCK_C and DRM_MODE_TYPE_CRTC_C: Define leftovers
* which are stuck around for hysterical raisins only. No one has an
* idea what they were meant for. Don't use.
*/
u8 type;
/**
* @expose_to_userspace:
*
* Indicates whether the mode is to be exposed to the userspace.
* This is to maintain a set of exposed modes while preparing
* user-mode's list in drm_mode_getconnector ioctl. The purpose of
* this only lies in the ioctl function, and is not to be used
* outside the function.
*/
bool expose_to_userspace;
/**
* @head:
*
* struct list_head for mode lists.
*/
struct list_head head;
/**
* @name:
*
* Human-readable name of the mode, filled out with drm_mode_set_name().
*/
char name[DRM_DISPLAY_MODE_LEN];
/**
* @status:
*
* Status of the mode, used to filter out modes not supported by the
* hardware. See enum &drm_mode_status.
*/
enum drm_mode_status status;
/**
* @picture_aspect_ratio:
*
* Field for setting the HDMI picture aspect ratio of a mode.
*/
enum hdmi_picture_aspect picture_aspect_ratio;
};