mirror of
https://github.com/torvalds/linux.git
synced 2024-12-12 14:12:51 +00:00
d3194520e2
This commit implements frame decimation for stk1160, which allows to support format changes instead of a static frame size. The stk1160 supports independent row and column decimation, in two different modes: * set a number of rows/columns units to skip for each unit sent. * set a number of rows/columns units to send for each unit skipped. This effectively allows to achieve different frame scaling ratios. The unit number can be set to either two row/columns sent/skipped, or four row/columns sent/skipped. Since the video format (UYVY) has 4-bytes, using a unit number of two row/columns results in frame color 'shifting', so set to four row/columns sent/skipped. Signed-off-by: Michael Stegemann <michael@stegemann.it> Signed-off-by: Dale Hamel <dale.hamel@srvthe.net> Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
128 lines
3.7 KiB
C
128 lines
3.7 KiB
C
/*
|
|
* STK1160 driver
|
|
*
|
|
* Copyright (C) 2012 Ezequiel Garcia
|
|
* <elezegarcia--a.t--gmail.com>
|
|
*
|
|
* Based on Easycap driver by R.M. Thomas
|
|
* Copyright (C) 2010 R.M. Thomas
|
|
* <rmthomas--a.t--sciolus.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
*/
|
|
|
|
/* GPIO Control */
|
|
#define STK1160_GCTRL 0x000
|
|
|
|
/* Remote Wakup Control */
|
|
#define STK1160_RMCTL 0x00c
|
|
|
|
/*
|
|
* Decoder Control Register:
|
|
* This byte controls capture start/stop
|
|
* with bit #7 (0x?? OR 0x80 to activate).
|
|
*/
|
|
#define STK1160_DCTRL 0x100
|
|
|
|
/*
|
|
* Decimation Control Register:
|
|
* Byte 104: Horizontal Decimation Line Unit Count
|
|
* Byte 105: Vertical Decimation Line Unit Count
|
|
* Byte 106: Decimation Control
|
|
* Bit 0 - Horizontal Decimation Control
|
|
* 0 Horizontal decimation is disabled.
|
|
* 1 Horizontal decimation is enabled.
|
|
* Bit 1 - Decimates Half or More Column
|
|
* 0 Decimates less than half from original column,
|
|
* send count unit (0x105) before each unit skipped.
|
|
* 1 Decimates half or more from original column,
|
|
* skip count unit (0x105) before each unit sent.
|
|
* Bit 2 - Vertical Decimation Control
|
|
* 0 Vertical decimation is disabled.
|
|
* 1 Vertical decimation is enabled.
|
|
* Bit 3 - Vertical Greater or Equal to Half
|
|
* 0 Decimates less than half from original row,
|
|
* send count unit (0x105) before each unit skipped.
|
|
* 1 Decimates half or more from original row,
|
|
* skip count unit (0x105) before each unit sent.
|
|
* Bit 4 - Decimation Unit
|
|
* 0 Decimation will work with 2 rows or columns per unit.
|
|
* 1 Decimation will work with 4 rows or columns per unit.
|
|
*/
|
|
#define STK1160_DMCTRL_H_UNITS 0x104
|
|
#define STK1160_DMCTRL_V_UNITS 0x105
|
|
#define STK1160_DMCTRL 0x106
|
|
#define STK1160_H_DEC_EN BIT(0)
|
|
#define STK1160_H_DEC_MODE BIT(1)
|
|
#define STK1160_V_DEC_EN BIT(2)
|
|
#define STK1160_V_DEC_MODE BIT(3)
|
|
#define STK1160_DEC_UNIT_SIZE BIT(4)
|
|
|
|
/* Capture Frame Start Position */
|
|
#define STK116_CFSPO 0x110
|
|
#define STK116_CFSPO_STX_L 0x110
|
|
#define STK116_CFSPO_STX_H 0x111
|
|
#define STK116_CFSPO_STY_L 0x112
|
|
#define STK116_CFSPO_STY_H 0x113
|
|
|
|
/* Capture Frame End Position */
|
|
#define STK116_CFEPO 0x114
|
|
#define STK116_CFEPO_ENX_L 0x114
|
|
#define STK116_CFEPO_ENX_H 0x115
|
|
#define STK116_CFEPO_ENY_L 0x116
|
|
#define STK116_CFEPO_ENY_H 0x117
|
|
|
|
/* Serial Interface Control */
|
|
#define STK1160_SICTL 0x200
|
|
#define STK1160_SICTL_CD 0x202
|
|
#define STK1160_SICTL_SDA 0x203
|
|
|
|
/* Serial Bus Write */
|
|
#define STK1160_SBUSW 0x204
|
|
#define STK1160_SBUSW_WA 0x204
|
|
#define STK1160_SBUSW_WD 0x205
|
|
|
|
/* Serial Bus Read */
|
|
#define STK1160_SBUSR 0x208
|
|
#define STK1160_SBUSR_RA 0x208
|
|
#define STK1160_SBUSR_RD 0x209
|
|
|
|
/* Alternate Serial Inteface Control */
|
|
#define STK1160_ASIC 0x2fc
|
|
|
|
/* PLL Select Options */
|
|
#define STK1160_PLLSO 0x018
|
|
|
|
/* PLL Frequency Divider */
|
|
#define STK1160_PLLFD 0x01c
|
|
|
|
/* Timing Generator */
|
|
#define STK1160_TIGEN 0x300
|
|
|
|
/* Timing Control Parameter */
|
|
#define STK1160_TICTL 0x350
|
|
|
|
/* AC97 Audio Control */
|
|
#define STK1160_AC97CTL_0 0x500
|
|
#define STK1160_AC97CTL_1 0x504
|
|
|
|
/* Use [0:6] bits of register 0x504 to set codec command address */
|
|
#define STK1160_AC97_ADDR 0x504
|
|
/* Use [16:31] bits of register 0x500 to set codec command data */
|
|
#define STK1160_AC97_CMD 0x502
|
|
|
|
/* Audio I2S Interface */
|
|
#define STK1160_I2SCTL 0x50c
|
|
|
|
/* EEPROM Interface */
|
|
#define STK1160_EEPROM_SZ 0x5f0
|