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linux/include/drm/drm_modes.h
Philipp Zabel 82581fcf07 drm/modes: add non-OF stub for of_get_drm_display_mode 
If CONFIG_OF is disabled, of_get_drm_display_mode is not compiled in,
and drivers using it fail to build:

  ld: drivers/gpu/drm/imx/parallel-display.o: in function `imx_pd_connector_get_modes':
  parallel-display.c:(.text+0x8d): undefined reference to `of_get_drm_display_mode'

Add an inline stub so they can be build-tested with non-OF
configurations.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2021-01-08 19:42:14 +01:00

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/*
* Copyright © 2006 Keith Packard
* Copyright © 2007-2008 Dave Airlie
* Copyright © 2007-2008 Intel Corporation
* Jesse Barnes <jesse.barnes@intel.com>
* Copyright © 2014 Intel Corporation
* Daniel Vetter <daniel.vetter@ffwll.ch>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef __DRM_MODES_H__
#define __DRM_MODES_H__
#include <linux/hdmi.h>
#include <drm/drm_mode_object.h>
#include <drm/drm_connector.h>
struct videomode;
/*
* Note on terminology: here, for brevity and convenience, we refer to connector
* control chips as 'CRTCs'. They can control any type of connector, VGA, LVDS,
* DVI, etc. And 'screen' refers to the whole of the visible display, which
* may span multiple monitors (and therefore multiple CRTC and connector
* structures).
*/
/**
* enum drm_mode_status - hardware support status of a mode
* @MODE_OK: Mode OK
* @MODE_HSYNC: hsync out of range
* @MODE_VSYNC: vsync out of range
* @MODE_H_ILLEGAL: mode has illegal horizontal timings
* @MODE_V_ILLEGAL: mode has illegal vertical timings
* @MODE_BAD_WIDTH: requires an unsupported linepitch
* @MODE_NOMODE: no mode with a matching name
* @MODE_NO_INTERLACE: interlaced mode not supported
* @MODE_NO_DBLESCAN: doublescan mode not supported
* @MODE_NO_VSCAN: multiscan mode not supported
* @MODE_MEM: insufficient video memory
* @MODE_VIRTUAL_X: mode width too large for specified virtual size
* @MODE_VIRTUAL_Y: mode height too large for specified virtual size
* @MODE_MEM_VIRT: insufficient video memory given virtual size
* @MODE_NOCLOCK: no fixed clock available
* @MODE_CLOCK_HIGH: clock required is too high
* @MODE_CLOCK_LOW: clock required is too low
* @MODE_CLOCK_RANGE: clock/mode isn't in a ClockRange
* @MODE_BAD_HVALUE: horizontal timing was out of range
* @MODE_BAD_VVALUE: vertical timing was out of range
* @MODE_BAD_VSCAN: VScan value out of range
* @MODE_HSYNC_NARROW: horizontal sync too narrow
* @MODE_HSYNC_WIDE: horizontal sync too wide
* @MODE_HBLANK_NARROW: horizontal blanking too narrow
* @MODE_HBLANK_WIDE: horizontal blanking too wide
* @MODE_VSYNC_NARROW: vertical sync too narrow
* @MODE_VSYNC_WIDE: vertical sync too wide
* @MODE_VBLANK_NARROW: vertical blanking too narrow
* @MODE_VBLANK_WIDE: vertical blanking too wide
* @MODE_PANEL: exceeds panel dimensions
* @MODE_INTERLACE_WIDTH: width too large for interlaced mode
* @MODE_ONE_WIDTH: only one width is supported
* @MODE_ONE_HEIGHT: only one height is supported
* @MODE_ONE_SIZE: only one resolution is supported
* @MODE_NO_REDUCED: monitor doesn't accept reduced blanking
* @MODE_NO_STEREO: stereo modes not supported
* @MODE_NO_420: ycbcr 420 modes not supported
* @MODE_STALE: mode has become stale
* @MODE_BAD: unspecified reason
* @MODE_ERROR: error condition
*
* This enum is used to filter out modes not supported by the driver/hardware
* combination.
*/
enum drm_mode_status {
MODE_OK = 0,
MODE_HSYNC,
MODE_VSYNC,
MODE_H_ILLEGAL,
MODE_V_ILLEGAL,
MODE_BAD_WIDTH,
MODE_NOMODE,
MODE_NO_INTERLACE,
MODE_NO_DBLESCAN,
MODE_NO_VSCAN,
MODE_MEM,
MODE_VIRTUAL_X,
MODE_VIRTUAL_Y,
MODE_MEM_VIRT,
MODE_NOCLOCK,
MODE_CLOCK_HIGH,
MODE_CLOCK_LOW,
MODE_CLOCK_RANGE,
MODE_BAD_HVALUE,
MODE_BAD_VVALUE,
MODE_BAD_VSCAN,
MODE_HSYNC_NARROW,
MODE_HSYNC_WIDE,
MODE_HBLANK_NARROW,
MODE_HBLANK_WIDE,
MODE_VSYNC_NARROW,
MODE_VSYNC_WIDE,
MODE_VBLANK_NARROW,
MODE_VBLANK_WIDE,
MODE_PANEL,
MODE_INTERLACE_WIDTH,
MODE_ONE_WIDTH,
MODE_ONE_HEIGHT,
MODE_ONE_SIZE,
MODE_NO_REDUCED,
MODE_NO_STEREO,
MODE_NO_420,
MODE_STALE = -3,
MODE_BAD = -2,
MODE_ERROR = -1
};
#define DRM_MODE(nm, t, c, hd, hss, hse, ht, hsk, vd, vss, vse, vt, vs, f) \
.name = nm, .status = 0, .type = (t), .clock = (c), \
.hdisplay = (hd), .hsync_start = (hss), .hsync_end = (hse), \
.htotal = (ht), .hskew = (hsk), .vdisplay = (vd), \
.vsync_start = (vss), .vsync_end = (vse), .vtotal = (vt), \
.vscan = (vs), .flags = (f)
/**
* DRM_SIMPLE_MODE - Simple display mode
* @hd: Horizontal resolution, width
* @vd: Vertical resolution, height
* @hd_mm: Display width in millimeters
* @vd_mm: Display height in millimeters
*
* This macro initializes a &drm_display_mode that only contains info about
* resolution and physical size.
*/
#define DRM_SIMPLE_MODE(hd, vd, hd_mm, vd_mm) \
.type = DRM_MODE_TYPE_DRIVER, .clock = 1 /* pass validation */, \
.hdisplay = (hd), .hsync_start = (hd), .hsync_end = (hd), \
.htotal = (hd), .vdisplay = (vd), .vsync_start = (vd), \
.vsync_end = (vd), .vtotal = (vd), .width_mm = (hd_mm), \
.height_mm = (vd_mm)
#define CRTC_INTERLACE_HALVE_V (1 << 0) /* halve V values for interlacing */
#define CRTC_STEREO_DOUBLE (1 << 1) /* adjust timings for stereo modes */
#define CRTC_NO_DBLSCAN (1 << 2) /* don't adjust doublescan */
#define CRTC_NO_VSCAN (1 << 3) /* don't adjust doublescan */
#define CRTC_STEREO_DOUBLE_ONLY (CRTC_STEREO_DOUBLE | CRTC_NO_DBLSCAN | CRTC_NO_VSCAN)
#define DRM_MODE_FLAG_3D_MAX DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF
#define DRM_MODE_MATCH_TIMINGS (1 << 0)
#define DRM_MODE_MATCH_CLOCK (1 << 1)
#define DRM_MODE_MATCH_FLAGS (1 << 2)
#define DRM_MODE_MATCH_3D_FLAGS (1 << 3)
#define DRM_MODE_MATCH_ASPECT_RATIO (1 << 4)
/**
* struct drm_display_mode - DRM kernel-internal display mode structure
* @hdisplay: horizontal display size
* @hsync_start: horizontal sync start
* @hsync_end: horizontal sync end
* @htotal: horizontal total size
* @hskew: horizontal skew?!
* @vdisplay: vertical display size
* @vsync_start: vertical sync start
* @vsync_end: vertical sync end
* @vtotal: vertical total size
* @vscan: vertical scan?!
* @crtc_hdisplay: hardware mode horizontal display size
* @crtc_hblank_start: hardware mode horizontal blank start
* @crtc_hblank_end: hardware mode horizontal blank end
* @crtc_hsync_start: hardware mode horizontal sync start
* @crtc_hsync_end: hardware mode horizontal sync end
* @crtc_htotal: hardware mode horizontal total size
* @crtc_hskew: hardware mode horizontal skew?!
* @crtc_vdisplay: hardware mode vertical display size
* @crtc_vblank_start: hardware mode vertical blank start
* @crtc_vblank_end: hardware mode vertical blank end
* @crtc_vsync_start: hardware mode vertical sync start
* @crtc_vsync_end: hardware mode vertical sync end
* @crtc_vtotal: hardware mode vertical total size
*
* This is the kernel API display mode information structure. For the
* user-space version see struct drm_mode_modeinfo.
*
* The horizontal and vertical timings are defined per the following diagram.
*
* ::
*
*
* Active Front Sync Back
* Region Porch Porch
* <-----------------------><----------------><-------------><-------------->
* //////////////////////|
* ////////////////////// |
* ////////////////////// |.................. ................
* _______________
* <----- [hv]display ----->
* <------------- [hv]sync_start ------------>
* <--------------------- [hv]sync_end --------------------->
* <-------------------------------- [hv]total ----------------------------->*
*
* This structure contains two copies of timings. First are the plain timings,
* which specify the logical mode, as it would be for a progressive 1:1 scanout
* at the refresh rate userspace can observe through vblank timestamps. Then
* there's the hardware timings, which are corrected for interlacing,
* double-clocking and similar things. They are provided as a convenience, and
* can be appropriately computed using drm_mode_set_crtcinfo().
*
* For printing you can use %DRM_MODE_FMT and DRM_MODE_ARG().
*/
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;
};
/**
* DRM_MODE_FMT - printf string for &struct drm_display_mode
*/
#define DRM_MODE_FMT "\"%s\": %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x"
/**
* DRM_MODE_ARG - printf arguments for &struct drm_display_mode
* @m: display mode
*/
#define DRM_MODE_ARG(m) \
(m)->name, drm_mode_vrefresh(m), (m)->clock, \
(m)->hdisplay, (m)->hsync_start, (m)->hsync_end, (m)->htotal, \
(m)->vdisplay, (m)->vsync_start, (m)->vsync_end, (m)->vtotal, \
(m)->type, (m)->flags
#define obj_to_mode(x) container_of(x, struct drm_display_mode, base)
/**
* drm_mode_is_stereo - check for stereo mode flags
* @mode: drm_display_mode to check
*
* Returns:
* True if the mode is one of the stereo modes (like side-by-side), false if
* not.
*/
static inline bool drm_mode_is_stereo(const struct drm_display_mode *mode)
{
return mode->flags & DRM_MODE_FLAG_3D_MASK;
}
struct drm_connector;
struct drm_cmdline_mode;
struct drm_display_mode *drm_mode_create(struct drm_device *dev);
void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode);
void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
const struct drm_display_mode *in);
int drm_mode_convert_umode(struct drm_device *dev,
struct drm_display_mode *out,
const struct drm_mode_modeinfo *in);
void drm_mode_probed_add(struct drm_connector *connector, struct drm_display_mode *mode);
void drm_mode_debug_printmodeline(const struct drm_display_mode *mode);
bool drm_mode_is_420_only(const struct drm_display_info *display,
const struct drm_display_mode *mode);
bool drm_mode_is_420_also(const struct drm_display_info *display,
const struct drm_display_mode *mode);
bool drm_mode_is_420(const struct drm_display_info *display,
const struct drm_display_mode *mode);
struct drm_display_mode *drm_cvt_mode(struct drm_device *dev,
int hdisplay, int vdisplay, int vrefresh,
bool reduced, bool interlaced,
bool margins);
struct drm_display_mode *drm_gtf_mode(struct drm_device *dev,
int hdisplay, int vdisplay, int vrefresh,
bool interlaced, int margins);
struct drm_display_mode *drm_gtf_mode_complex(struct drm_device *dev,
int hdisplay, int vdisplay,
int vrefresh, bool interlaced,
int margins,
int GTF_M, int GTF_2C,
int GTF_K, int GTF_2J);
void drm_display_mode_from_videomode(const struct videomode *vm,
struct drm_display_mode *dmode);
void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
struct videomode *vm);
void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags);
#if defined(CONFIG_OF)
int of_get_drm_display_mode(struct device_node *np,
struct drm_display_mode *dmode, u32 *bus_flags,
int index);
#else
static inline int of_get_drm_display_mode(struct device_node *np,
struct drm_display_mode *dmode,
u32 *bus_flags, int index)
{
return -EINVAL;
}
#endif
void drm_mode_set_name(struct drm_display_mode *mode);
int drm_mode_vrefresh(const struct drm_display_mode *mode);
void drm_mode_get_hv_timing(const struct drm_display_mode *mode,
int *hdisplay, int *vdisplay);
void drm_mode_set_crtcinfo(struct drm_display_mode *p,
int adjust_flags);
void drm_mode_copy(struct drm_display_mode *dst,
const struct drm_display_mode *src);
struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
const struct drm_display_mode *mode);
bool drm_mode_match(const struct drm_display_mode *mode1,
const struct drm_display_mode *mode2,
unsigned int match_flags);
bool drm_mode_equal(const struct drm_display_mode *mode1,
const struct drm_display_mode *mode2);
bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1,
const struct drm_display_mode *mode2);
bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1,
const struct drm_display_mode *mode2);
/* for use by the crtc helper probe functions */
enum drm_mode_status drm_mode_validate_driver(struct drm_device *dev,
const struct drm_display_mode *mode);
enum drm_mode_status drm_mode_validate_size(const struct drm_display_mode *mode,
int maxX, int maxY);
enum drm_mode_status
drm_mode_validate_ycbcr420(const struct drm_display_mode *mode,
struct drm_connector *connector);
void drm_mode_prune_invalid(struct drm_device *dev,
struct list_head *mode_list, bool verbose);
void drm_mode_sort(struct list_head *mode_list);
void drm_connector_list_update(struct drm_connector *connector);
/* parsing cmdline modes */
bool
drm_mode_parse_command_line_for_connector(const char *mode_option,
const struct drm_connector *connector,
struct drm_cmdline_mode *mode);
struct drm_display_mode *
drm_mode_create_from_cmdline_mode(struct drm_device *dev,
struct drm_cmdline_mode *cmd);
#endif /* __DRM_MODES_H__ */
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