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/*

 * Copyright © 2006 Keith Packard

 * Copyright © 2007-2008 Dave Airlie

 * Copyright © 2007-2008 Intel Corporation

 *   Jesse Barnes 

 * Copyright © 2014 Intel Corporation

 *   Daniel Vetter 

 *

 * 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__

/*

 * 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 {

    MODE_OK	= 0,	/* 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 horizontal 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_UNVERIFIED = -3, /* mode needs to reverified */

    MODE_BAD = -2,	/* unspecified reason */

    MODE_ERROR	= -1	/* error condition */

};

#define DRM_MODE_TYPE_CLOCK_CRTC_C (DRM_MODE_TYPE_CLOCK_C | \

				    DRM_MODE_TYPE_CRTC_C)

#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), \

	.base.type = DRM_MODE_OBJECT_MODE

#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

struct drm_display_mode {

	/* Header */

	struct list_head head;

	struct drm_mode_object base;

	char name[DRM_DISPLAY_MODE_LEN];

	enum drm_mode_status status;

	unsigned int type;

	/* Proposed mode values */

	int clock;		/* in kHz */

	int hdisplay;

	int hsync_start;

	int hsync_end;

	int htotal;

	int hskew;

	int vdisplay;

	int vsync_start;

	int vsync_end;

	int vtotal;

	int vscan;

	unsigned int flags;

	/* Addressable image size (may be 0 for projectors, etc.) */

	int width_mm;

	int height_mm;

	/* Actual mode we give to hw */

	int crtc_clock;		/* in KHz */

	int crtc_hdisplay;

	int crtc_hblank_start;

	int crtc_hblank_end;

	int crtc_hsync_start;

	int crtc_hsync_end;

	int crtc_htotal;

	int crtc_hskew;

	int crtc_vdisplay;

	int crtc_vblank_start;

	int crtc_vblank_end;

	int crtc_vsync_start;

	int crtc_vsync_end;

	int crtc_vtotal;

	/* Driver private mode info */

	int *private;

	int private_flags;

	int vrefresh;		/* in Hz */

	int hsync;		/* in kHz */

	enum hdmi_picture_aspect picture_aspect_ratio;

};

/* mode specified on the command line */

struct drm_cmdline_mode {

	bool specified;

	bool refresh_specified;

	bool bpp_specified;

	int xres, yres;

	int bpp;

	int refresh;

	bool rb;

	bool interlace;

	bool cvt;

	bool margins;

	enum drm_connector_force force;

};

/**

 * 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_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);

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);

int of_get_drm_display_mode(struct device_node *np,

			    struct drm_display_mode *dmode,

			    int index);

void drm_mode_set_name(struct drm_display_mode *mode);

int drm_mode_hsync(const struct drm_display_mode *mode);

int drm_mode_vrefresh(const struct drm_display_mode *mode);

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_equal(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_basic(const struct drm_display_mode *mode);

enum drm_mode_status drm_mode_validate_size(const struct drm_display_mode *mode,

					    int maxX, int maxY);

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_mode_connector_list_update(struct drm_connector *connector, bool merge_type_bits);

/* parsing cmdline modes */

bool

drm_mode_parse_command_line_for_connector(const char *mode_option,

					  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__ */