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[media] mt9v022: set y_skip_top field to zero as default

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Set "y_skip_top" to zero and revise comment as I do not see this line
corruption on two different mt9v022 setups. The first read-out line
is perfectly fine. Add mt9v022 platform data configuring y_skip_top
for platforms that have issues with the first read-out line. Set
y_skip_top to 1 for pcm990 board.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Acked-by: Eric Miao <eric.y.miao@gmail.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Anatolij Gustschin 2012-09-27 19:05:27 -03:00 committed by Mauro Carvalho Chehab
parent d0bac768fb
commit b6f50b49b9
3 changed files with 27 additions and 3 deletions
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6
arch/arm/mach-pxa/pcm990-baseboard.c
View file

@ -26,6 +26,7 @@
#include <linux/i2c/pxa-i2c.h>
#include <linux/pwm_backlight.h>
#include <media/mt9v022.h>
#include <media/soc_camera.h>
#include <linux/platform_data/camera-pxa.h>
@ -468,6 +469,10 @@ static struct i2c_board_info __initdata pcm990_i2c_devices[] = {
},
};
static struct mt9v022_platform_data mt9v022_pdata = {
.y_skip_top = 1,
};
static struct i2c_board_info pcm990_camera_i2c[] = {
{
I2C_BOARD_INFO("mt9v022", 0x48),
@ -480,6 +485,7 @@ static struct soc_camera_link iclink[] = {
{
.bus_id = 0, /* Must match with the camera ID */
.board_info = &pcm990_camera_i2c[0],
.priv = &mt9v022_pdata,
.i2c_adapter_id = 0,
.query_bus_param = pcm990_camera_query_bus_param,
.set_bus_param = pcm990_camera_set_bus_param,

8
drivers/media/i2c/soc_camera/mt9v022.c
View file

@ -15,6 +15,7 @@
#include <linux/log2.h>
#include <linux/module.h>
#include <media/mt9v022.h>
#include <media/soc_camera.h>
#include <media/soc_mediabus.h>
#include <media/v4l2-subdev.h>
@ -869,6 +870,7 @@ static int mt9v022_probe(struct i2c_client *client,
struct mt9v022 *mt9v022;
struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
struct mt9v022_platform_data *pdata = icl->priv;
int ret;
if (!icl) {
@ -932,10 +934,10 @@ static int mt9v022_probe(struct i2c_client *client,
mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
/*
* MT9V022 _really_ corrupts the first read out line.
* TODO: verify on i.MX31
* On some platforms the first read out line is corrupted.
* Workaround it by skipping if indicated by platform data.
*/
mt9v022->y_skip_top = 1;
mt9v022->y_skip_top = pdata ? pdata->y_skip_top : 0;
mt9v022->rect.left = MT9V022_COLUMN_SKIP;
mt9v022->rect.top = MT9V022_ROW_SKIP;
mt9v022->rect.width = MT9V022_MAX_WIDTH;

16
include/media/mt9v022.h Normal file
View file

@ -0,0 +1,16 @@
/*
* mt9v022 sensor
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __MT9V022_H__
#define __MT9V022_H__
struct mt9v022_platform_data {
unsigned short y_skip_top; /* Lines to skip at the top */
};
#endif