mirror of
https://github.com/apache/nuttx.git
synced 2026-06-06 08:36:24 +08:00
viedo/videomode: Rename video/edid to video/videomode. There is more there than just EDID but it is all basically videomode stuff
video/videomode/vesagtf.c: Bring VESA Generalized Timing Formula (GTF) from FreeBSD.
This commit is contained in:
Gregory Nutt
@@ -574,7 +574,7 @@ struct edid_info_s
|
||||
|
||||
int edid_parse(FAR const uint8_t *data, FAR struct edid_info_s *edid);
|
||||
|
||||
/****************************************************************************
|
||||
/********************************************************************************************
|
||||
* Name: edid_dump
|
||||
*
|
||||
* Description:
|
||||
@@ -586,7 +586,7 @@ int edid_parse(FAR const uint8_t *data, FAR struct edid_info_s *edid);
|
||||
* Returned Value:
|
||||
* None
|
||||
*
|
||||
****************************************************************************/
|
||||
********************************************************************************************/
|
||||
|
||||
void edid_dump(FAR const struct edid_info_s *edid);
|
||||
|
||||
|
||||
@@ -0,0 +1,121 @@
|
||||
/**************************************************************************7
|
||||
* include/nuttx/video/vesagtf.h
|
||||
* EDID (Extended Display Identification Data) Format
|
||||
*
|
||||
* Copyright (C) 2019 Gregory Nutt. All rights reserved.
|
||||
* Author: Gregory Nutt <gnutt@nuttx.org>
|
||||
*
|
||||
* Derives from logic in FreeBSD which has an equivalent 3-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:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
********************************************************************************************/
|
||||
|
||||
#ifndef __INCLUDE_NUTTX_VIDEO_VESAGTF
|
||||
#define __INCLUDE_NUTTX_VIDEO_VESAGTF
|
||||
|
||||
/****************************************************************************
|
||||
* Pre-processor Definitions
|
||||
****************************************************************************/
|
||||
|
||||
/* Default values to use for params. */
|
||||
|
||||
#define VESAGTF_MARGIN_PPT 18 /* 1.8% */
|
||||
#define VESAGTF_MIN_PORCH 1 /* minimum front porch */
|
||||
#define VESAGTF_VSYNC_RQD 3 /* vsync width in lines */
|
||||
#define VESAGTF_HSYNC_PCT 8 /* width of hsync % of total line */
|
||||
#define VESAGTF_MIN_VSBP 550 /* min vsync + back porch (usec) */
|
||||
#define VESAGTF_M 600 /* blanking formula gradient */
|
||||
#define VESAGTF_C 40 /* blanking formula offset */
|
||||
#define VESAGTF_K 128 /* blanking formula scaling factor */
|
||||
#define VESAGTF_J 20 /* blanking formula scaling factor */
|
||||
|
||||
#define VESAGTF_FLAG_ILACE 0x0001/* use interlace */
|
||||
#define VESAGTF_FLAG_MARGINS 0x0002/* use margins */
|
||||
|
||||
/****************************************************************************
|
||||
* Pre-processor Definitions
|
||||
****************************************************************************/
|
||||
|
||||
/* Use VESA GTF formula to generate a monitor mode, given resolution and
|
||||
* refresh rates.
|
||||
*/
|
||||
|
||||
struct vesagtf_params
|
||||
{
|
||||
unsigned int margin_ppt; /* Bertical margin size, percent * 10 think
|
||||
* parts-per-thousand */
|
||||
unsigned int min_porch; /* Minimum front porch */
|
||||
unsigned int vsync_rqd; /* Width of vsync in lines */
|
||||
unsigned int hsync_pct; /* Hsync as % of total width */
|
||||
unsigned int min_vsbp; /* Minimum vsync + back porch (usec) */
|
||||
unsigned int m; /* Blanking formula gradient */
|
||||
unsigned int c; /* Blanking formula offset */
|
||||
unsigned int k; /* Blanking formula scaling factor */
|
||||
unsigned int j; /* Blanking formula scaling factor */
|
||||
};
|
||||
|
||||
/****************************************************************************
|
||||
* Public Function Prototypes
|
||||
****************************************************************************/
|
||||
|
||||
struct videomode_s; /* Forward reference */
|
||||
|
||||
/****************************************************************************
|
||||
* Name: vesagtf_mode
|
||||
*
|
||||
* Description:
|
||||
* Use VESA GTF formula to generate monitor timings. Assumes default
|
||||
* GTF parameters, non-interlaced, and no margins.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
void vesagtf_mode(unsigned int x, unsigned int y, unsigned int refresh,
|
||||
FAR struct videomode_s *videomode);
|
||||
|
||||
/****************************************************************************
|
||||
* Name: vesagtf_mode_params
|
||||
*
|
||||
* Description:
|
||||
* vesagtf_mode_params() - as defined by the GTF Timing Standard, compute
|
||||
* the Stage 1 Parameters using the vertical refresh frequency. In other
|
||||
* words: input a desired resolution and desired refresh rate, and
|
||||
* output the GTF mode timings.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
void vesagtf_mode_params(unsigned int x, unsigned int y, unsigned int refresh,
|
||||
FAR struct vesagtf_params *params,
|
||||
unsigned int flags,
|
||||
FAR struct videomode_s *videomode);
|
||||
|
||||
#endif /* __INCLUDE_NUTTX_VIDEO_VESAGTF */
|
||||
@@ -142,9 +142,10 @@ FAR const struct videomode_s *videomode_lookup(FAR const char *name);
|
||||
* Dump the content of a video mode one one line to the SYSLOG.
|
||||
*
|
||||
* Input Parameters:
|
||||
* prefix - A string to print at the beginning of the line
|
||||
* prefix - A string to print at the beginning of the line. May be
|
||||
* NULL
|
||||
* videomode - The videomode to be dumped
|
||||
* terse - True: print only a minimal amount of data, sufficent to
|
||||
* terse - True: Print only a minimal amount of data, sufficient to
|
||||
* identify the video mode.
|
||||
*
|
||||
* Returned Value:
|
||||
|
||||
Reference in New Issue
Block a user