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include/nuttx/lcd/edid.h: Take changes from am335x branch.

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This commit is contained in:
Gregory Nutt 2019-07-07 12:08:39 -06:00
parent 70f99585d8
commit 8edff9d295
1 changed files with 143 additions and 0 deletions
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143
include/nuttx/lcd/edid.h
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@ -7,6 +7,12 @@
*
* Reference: Wikipedia
*
* Some of structures in this file derive from FreeBSD which has a
* compatible 2-clause BSD license:
*
* Copyright (c) 2006 Itronix Inc. All rights reserved.
* Written by Garrett D'Amore for Itronix Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
@ -356,4 +362,141 @@
* According to LS-EXT, actual contents varies
* from manufacturer. However, the value is
* later used by DDDB. */
/* Video mode flags used in struct hdmi_videomode_s */
#define VID_PHSYNC (1 << 0)
#define VID_NHSYNC (1 << 1)
#define VID_PVSYNC (1 << 2)
#define VID_NVSYNC (1 << 3)
#define VID_INTERLACE (1 << 4)
#define VID_DBLSCAN (1 << 5)
#define VID_CSYNC (1 << 6)
#define VID_PCSYNC (1 << 7)
#define VID_NCSYNC (1 << 8)
#define VID_HSKEW (1 << 9)
#define VID_BCAST (1 << 10)
#define VID_PIXMUX (1 << 11)
#define VID_DBLCLK (1 << 12)
#define VID_CLKDIV2 (1 << 13)
/********************************************************************************************
* Pre-processor Definitions
********************************************************************************************/
/* This structure represents one video mode extracted from the EDID */
struct edid_videomode_s
{
int dotclock; /* Dot clock frequency in kHz. */
int hdisplay;
int hsync_start;
int hsync_end;
int htotal;
int vdisplay;
int vsync_start;
int vsync_end;
int vtotal;
int flags; /* Video mode flags; see above. */
FAR const char *name;
int hskew;
};
/* These structures is a user-friendly digest of the EDID data. */
struct edid_chroma_s
{
uint16_t ec_redx;
uint16_t ec_redy;
uint16_t ec_greenx;
uint16_t ec_greeny;
uint16_t ec_bluex;
uint16_t ec_bluey;
uint16_t ec_whitex;
uint16_t ec_whitey;
};
struct edid_range_s
{
uint16_t er_min_vfreq; /* Hz */
uint16_t er_max_vfreq; /* Hz */
uint16_t er_min_hfreq; /* kHz */
uint16_t er_max_hfreq; /* kHz */
uint16_t er_max_clock; /* MHz */
int er_have_gtf2;
uint16_t er_gtf2_hfreq;
uint16_t er_gtf2_c;
uint16_t er_gtf2_m;
uint16_t er_gtf2_k;
uint16_t er_gtf2_j;
};
struct edid_info_s
{
uint8_t edid_vendor[4];
char edid_vendorname[16];
char edid_productname[16];
char edid_comment[16];
char edid_serial[16];
uint16_t edid_product;
uint8_t edid_version;
uint8_t edid_revision;
int edid_year;
int edid_week;
uint8_t edid_video_input;
uint8_t edid_max_hsize; /* in cm */
uint8_t edid_max_vsize; /* in cm */
uint8_t edid_gamma;
uint8_t edid_features;
uint8_t edid_ext_block_count;
int edid_have_range;
struct edid_range_s edid_range;
struct edid_chroma_s edid_chroma;
/* Parsed modes */
FAR struct edid_videomode_s *edid_preferred_mode;
int edid_nmodes;
struct edid_videomode_s edid_modes[64];
};
/********************************************************************************************
* Public Function Prototypes
********************************************************************************************/
/********************************************************************************************
* Name: edid_parse
*
* Description:
* Given a block of raw EDID data, parse the data and convert it to the 'digested' form
* of struct edid_info_s.
*
* Input Parameters:
* data - A reference to the raw EDID data
* edid - The location to return the digested EDID data.
*
*
********************************************************************************************/
int edid_parse(FAR const uint8_t *data, FAR struct edid_info_s *edid);
/********************************************************************************************
* Name: edid_sort_modes
*
* Description:
* Sort video modes by refresh rate, aspect ratio (*), then resolution.
* Preferred mode or largest mode is first in the list and other modes
* are sorted on closest match to that mode.
*
* Input Parameters:
* modes - A reference to the first entry in a list of video modes
* preferred - A pointer to the pointer to the preferred mode in the list
* nmodes - The number of modes in the list
*
********************************************************************************************/
int edid_sort_modes(FAR struct edid_videomode_s *modes,
FAR struct edid_videomode_s **preferred, unsigned int nmodes);
#endif /* __INCLUDE_NUTTX_LCD_EDID_H */