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viafb: rework the I2C support in the VIA framebuffer driver 

This patch changes the way how the various I2C busses are used internally
inside the viafb driver:  Previosuly, only a single i2c_adapter was created,
even though two different hardware I2C busses are accessed: A structure member
in a global variable was modified to indicate the bus to be used.

Now, all existing hardware busses are registered with the i2c core, and the
viafb_i2c_{read,write}byte[s]() function take the adapter number as function
call parameter, rather than referring to the global structure member.

[jc: even more painful merge with mainline changes ->2.6.34]
[jc: painful merge with OLPC changes]

Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: ScottFang@viatech.com.cn
Cc: JosephChan@via.com.tw
Signed-off-by: Harald Welte <HaraldWelte@viatech.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Harald Welte 2009-05-23 00:35:39 +08:00 committed by Jonathan Corbet
parent c205d93253
commit 277d32a36c
8 changed files with 186 additions and 138 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/video/via/dvi.c
View File

@ -96,7 +96,7 @@ int viafb_tmds_trasmitter_identify(void)
viaparinfo->chip_info->tmds_chip_info.tmds_chip_name = VT1632_TMDS;
viaparinfo->chip_info->
tmds_chip_info.tmds_chip_slave_addr = VT1632_TMDS_I2C_ADDR;
viaparinfo->chip_info->tmds_chip_info.i2c_port = I2CPORTINDEX;
viaparinfo->chip_info->tmds_chip_info.i2c_port = VIA_I2C_ADAP_31;
if (check_tmds_chip(VT1632_DEVICE_ID_REG, VT1632_DEVICE_ID) != FAIL) {
/*
* Currently only support 12bits,dual edge,add 24bits mode later
@ -110,7 +110,7 @@ int viafb_tmds_trasmitter_identify(void)
viaparinfo->chip_info->tmds_chip_info.i2c_port);
return OK;
} else {
viaparinfo->chip_info->tmds_chip_info.i2c_port = GPIOPORTINDEX;
viaparinfo->chip_info->tmds_chip_info.i2c_port = VIA_I2C_ADAP_2C;
if (check_tmds_chip(VT1632_DEVICE_ID_REG, VT1632_DEVICE_ID)
!= FAIL) {
tmds_register_write(0x08, 0x3b);
@ -160,32 +160,26 @@ int viafb_tmds_trasmitter_identify(void)
static void tmds_register_write(int index, u8 data)
{
viaparinfo->shared->i2c_stuff.i2c_port =
viaparinfo->chip_info->tmds_chip_info.i2c_port;
viafb_i2c_writebyte(viaparinfo->chip_info->tmds_chip_info.
tmds_chip_slave_addr, index,
data);
viafb_i2c_writebyte(viaparinfo->chip_info->tmds_chip_info.i2c_port,
viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr,
index, data);
}
static int tmds_register_read(int index)
{
u8 data;
viaparinfo->shared->i2c_stuff.i2c_port =
viaparinfo->chip_info->tmds_chip_info.i2c_port;
viafb_i2c_readbyte((u8) viaparinfo->chip_info->
tmds_chip_info.tmds_chip_slave_addr,
viafb_i2c_readbyte(viaparinfo->chip_info->tmds_chip_info.i2c_port,
(u8) viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr,
(u8) index, &data);
return data;
}
static int tmds_register_read_bytes(int index, u8 *buff, int buff_len)
{
viaparinfo->shared->i2c_stuff.i2c_port =
viaparinfo->chip_info->tmds_chip_info.i2c_port;
viafb_i2c_readbytes((u8) viaparinfo->chip_info->tmds_chip_info.
tmds_chip_slave_addr, (u8) index, buff, buff_len);
viafb_i2c_readbytes(viaparinfo->chip_info->tmds_chip_info.i2c_port,
(u8) viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr,
(u8) index, buff, buff_len);
return 0;
}
@ -541,8 +535,9 @@ void viafb_dvi_enable(void)
else
data = 0x37;
viafb_i2c_writebyte(viaparinfo->chip_info->
tmds_chip_info.
tmds_chip_slave_addr,
tmds_chip_info.i2c_port,
viaparinfo->chip_info->
tmds_chip_info.tmds_chip_slave_addr,
0x08, data);
}
}

19
drivers/video/via/lcd.c
View File

@ -172,18 +172,16 @@ static bool lvds_identify_integratedlvds(void)
int viafb_lvds_trasmitter_identify(void)
{
viaparinfo->shared->i2c_stuff.i2c_port = I2CPORTINDEX;
if (viafb_lvds_identify_vt1636()) {
viaparinfo->chip_info->lvds_chip_info.i2c_port = I2CPORTINDEX;
if (viafb_lvds_identify_vt1636(VIA_I2C_ADAP_31)) {
viaparinfo->chip_info->lvds_chip_info.i2c_port = VIA_I2C_ADAP_31;
DEBUG_MSG(KERN_INFO
"Found VIA VT1636 LVDS on port i2c 0x31 \n");
"Found VIA VT1636 LVDS on port i2c 0x31\n");
} else {
viaparinfo->shared->i2c_stuff.i2c_port = GPIOPORTINDEX;
if (viafb_lvds_identify_vt1636()) {
if (viafb_lvds_identify_vt1636(VIA_I2C_ADAP_2C)) {
viaparinfo->chip_info->lvds_chip_info.i2c_port =
GPIOPORTINDEX;
VIA_I2C_ADAP_2C;
DEBUG_MSG(KERN_INFO
"Found VIA VT1636 LVDS on port gpio 0x2c \n");
"Found VIA VT1636 LVDS on port gpio 0x2c\n");
}
}
@ -421,9 +419,8 @@ static int lvds_register_read(int index)
{
u8 data;
viaparinfo->shared->i2c_stuff.i2c_port = GPIOPORTINDEX;
viafb_i2c_readbyte((u8) viaparinfo->chip_info->
lvds_chip_info.lvds_chip_slave_addr,
viafb_i2c_readbyte(VIA_I2C_ADAP_2C,
(u8) viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr,
(u8) index, &data);
return data;
}

181
drivers/video/via/via_i2c.c
View File

@ -1,5 +1,5 @@
/*
* Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
* Copyright 1998-2009 VIA Technologies, Inc. All Rights Reserved.
* Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
* This program is free software; you can redistribute it and/or
@ -24,40 +24,44 @@
static void via_i2c_setscl(void *data, int state)
{
u8 val;
struct via_i2c_stuff *via_i2c_chan = (struct via_i2c_stuff *)data;
struct via_i2c_adap_cfg *adap_data = data;
val = viafb_read_reg(VIASR, via_i2c_chan->i2c_port) & 0xF0;
printk(KERN_DEBUG "reading index 0x%02x from IO 0x%x\n",
adap_data->ioport_index, adap_data->io_port);
val = viafb_read_reg(adap_data->io_port,
adap_data->ioport_index) & 0xF0;
if (state)
val |= 0x20;
else
val &= ~0x20;
switch (via_i2c_chan->i2c_port) {
case I2CPORTINDEX:
switch (adap_data->type) {
case VIA_I2C_I2C:
val |= 0x01;
break;
case GPIOPORTINDEX:
case VIA_I2C_GPIO:
val |= 0x80;
break;
default:
DEBUG_MSG("via_i2c: specify wrong i2c port.\n");
DEBUG_MSG("viafb_i2c: specify wrong i2c type.\n");
}
viafb_write_reg(via_i2c_chan->i2c_port, VIASR, val);
viafb_write_reg(adap_data->ioport_index,
adap_data->io_port, val);
}
static int via_i2c_getscl(void *data)
{
struct via_i2c_stuff *via_i2c_chan = (struct via_i2c_stuff *)data;
struct via_i2c_adap_cfg *adap_data = data;
if (viafb_read_reg(VIASR, via_i2c_chan->i2c_port) & 0x08)
if (viafb_read_reg(adap_data->io_port, adap_data->ioport_index) & 0x08)
return 1;
return 0;
}
static int via_i2c_getsda(void *data)
{
struct via_i2c_stuff *via_i2c_chan = (struct via_i2c_stuff *)data;
struct via_i2c_adap_cfg *adap_data = data;
if (viafb_read_reg(VIASR, via_i2c_chan->i2c_port) & 0x04)
if (viafb_read_reg(adap_data->io_port, adap_data->ioport_index) & 0x04)
return 1;
return 0;
}
@ -65,27 +69,29 @@ static int via_i2c_getsda(void *data)
static void via_i2c_setsda(void *data, int state)
{
u8 val;
struct via_i2c_stuff *via_i2c_chan = (struct via_i2c_stuff *)data;
struct via_i2c_adap_cfg *adap_data = data;
val = viafb_read_reg(VIASR, via_i2c_chan->i2c_port) & 0xF0;
val = viafb_read_reg(adap_data->io_port,
adap_data->ioport_index) & 0xF0;
if (state)
val |= 0x10;
else
val &= ~0x10;
switch (via_i2c_chan->i2c_port) {
case I2CPORTINDEX:
switch (adap_data->type) {
case VIA_I2C_I2C:
val |= 0x01;
break;
case GPIOPORTINDEX:
case VIA_I2C_GPIO:
val |= 0x40;
break;
default:
DEBUG_MSG("via_i2c: specify wrong i2c port.\n");
DEBUG_MSG("viafb_i2c: specify wrong i2c type.\n");
}
viafb_write_reg(via_i2c_chan->i2c_port, VIASR, val);
viafb_write_reg(adap_data->ioport_index,
adap_data->io_port, val);
}
int viafb_i2c_readbyte(u8 slave_addr, u8 index, u8 *pdata)
int viafb_i2c_readbyte(u8 adap, u8 slave_addr, u8 index, u8 *pdata)
{
u8 mm1[] = {0x00};
struct i2c_msg msgs[2];
@ -97,12 +103,11 @@ int viafb_i2c_readbyte(u8 slave_addr, u8 index, u8 *pdata)
mm1[0] = index;
msgs[0].len = 1; msgs[1].len = 1;
msgs[0].buf = mm1; msgs[1].buf = pdata;
i2c_transfer(&viaparinfo->shared->i2c_stuff.adapter, msgs, 2);
return 0;
return i2c_transfer(&viaparinfo->shared->i2c_stuff[adap].adapter,
msgs, 2);
}
int viafb_i2c_writebyte(u8 slave_addr, u8 index, u8 data)
int viafb_i2c_writebyte(u8 adap, u8 slave_addr, u8 index, u8 data)
{
u8 msg[2] = { index, data };
struct i2c_msg msgs;
@ -111,10 +116,11 @@ int viafb_i2c_writebyte(u8 slave_addr, u8 index, u8 data)
msgs.addr = slave_addr / 2;
msgs.len = 2;
msgs.buf = msg;
return i2c_transfer(&viaparinfo->shared->i2c_stuff.adapter, &msgs, 1);
return i2c_transfer(&viaparinfo->shared->i2c_stuff[adap].adapter,
&msgs, 1);
}
int viafb_i2c_readbytes(u8 slave_addr, u8 index, u8 *buff, int buff_len)
int viafb_i2c_readbytes(u8 adap, u8 slave_addr, u8 index, u8 *buff, int buff_len)
{
u8 mm1[] = {0x00};
struct i2c_msg msgs[2];
@ -125,53 +131,88 @@ int viafb_i2c_readbytes(u8 slave_addr, u8 index, u8 *buff, int buff_len)
mm1[0] = index;
msgs[0].len = 1; msgs[1].len = buff_len;
msgs[0].buf = mm1; msgs[1].buf = buff;
i2c_transfer(&viaparinfo->shared->i2c_stuff.adapter, msgs, 2);
return i2c_transfer(&viaparinfo->shared->i2c_stuff[adap].adapter,
msgs, 2);
}
static int create_i2c_bus(struct i2c_adapter *adapter,
struct i2c_algo_bit_data *algo,
struct via_i2c_adap_cfg *adap_cfg,
struct pci_dev *pdev)
{
printk(KERN_DEBUG "viafb: creating bus adap=0x%p, algo_bit_data=0x%p, adap_cfg=0x%p\n", adapter, algo, adap_cfg);
algo->setsda = via_i2c_setsda;
algo->setscl = via_i2c_setscl;
algo->getsda = via_i2c_getsda;
algo->getscl = via_i2c_getscl;
algo->udelay = 40;
algo->timeout = 20;
algo->data = adap_cfg;
sprintf(adapter->name, "viafb i2c io_port idx 0x%02x",
adap_cfg->ioport_index);
adapter->owner = THIS_MODULE;
adapter->id = 0x01FFFF;
adapter->class = I2C_CLASS_DDC;
adapter->algo_data = algo;
if (pdev)
adapter->dev.parent = &pdev->dev;
else
adapter->dev.parent = NULL;
/* i2c_set_adapdata(adapter, adap_cfg); */
/* Raise SCL and SDA */
via_i2c_setsda(adap_cfg, 1);
via_i2c_setscl(adap_cfg, 1);
udelay(20);
return i2c_bit_add_bus(adapter);
}
static struct via_i2c_adap_cfg adap_configs[] = {
[VIA_I2C_ADAP_26] = { VIA_I2C_I2C, VIASR, 0x26 },
[VIA_I2C_ADAP_31] = { VIA_I2C_I2C, VIASR, 0x31 },
[VIA_I2C_ADAP_25] = { VIA_I2C_GPIO, VIASR, 0x25 },
[VIA_I2C_ADAP_2C] = { VIA_I2C_GPIO, VIASR, 0x2c },
[VIA_I2C_ADAP_3D] = { VIA_I2C_GPIO, VIASR, 0x3d },
{ 0, 0, 0 }
};
int viafb_create_i2c_busses(struct viafb_par *viapar)
{
int i, ret;
for (i = 0; i < VIAFB_NUM_I2C; i++) {
struct via_i2c_adap_cfg *adap_cfg = &adap_configs[i];
struct via_i2c_stuff *i2c_stuff = &viapar->shared->i2c_stuff[i];
if (adap_cfg->type == 0)
break;
ret = create_i2c_bus(&i2c_stuff->adapter,
&i2c_stuff->algo, adap_cfg,
NULL); /* FIXME: PCIDEV */
if (ret < 0) {
printk(KERN_ERR "viafb: cannot create i2c bus %u:%d\n",
i, ret);
/* FIXME: properly release previous busses */
return ret;
}
}
return 0;
}
int viafb_create_i2c_bus(void *viapar)
void viafb_delete_i2c_busses(struct viafb_par *par)
{
int ret;
struct via_i2c_stuff *i2c_stuff =
&((struct viafb_par *)viapar)->shared->i2c_stuff;
int i;
strcpy(i2c_stuff->adapter.name, "via_i2c");
i2c_stuff->i2c_port = 0x0;
i2c_stuff->adapter.owner = THIS_MODULE;
i2c_stuff->adapter.id = 0x01FFFF;
i2c_stuff->adapter.class = 0;
i2c_stuff->adapter.algo_data = &i2c_stuff->algo;
i2c_stuff->adapter.dev.parent = NULL;
i2c_stuff->algo.setsda = via_i2c_setsda;
i2c_stuff->algo.setscl = via_i2c_setscl;
i2c_stuff->algo.getsda = via_i2c_getsda;
i2c_stuff->algo.getscl = via_i2c_getscl;
i2c_stuff->algo.udelay = 40;
i2c_stuff->algo.timeout = 20;
i2c_stuff->algo.data = i2c_stuff;
i2c_set_adapdata(&i2c_stuff->adapter, i2c_stuff);
/* Raise SCL and SDA */
i2c_stuff->i2c_port = I2CPORTINDEX;
via_i2c_setsda(i2c_stuff, 1);
via_i2c_setscl(i2c_stuff, 1);
i2c_stuff->i2c_port = GPIOPORTINDEX;
via_i2c_setsda(i2c_stuff, 1);
via_i2c_setscl(i2c_stuff, 1);
udelay(20);
ret = i2c_bit_add_bus(&i2c_stuff->adapter);
if (ret == 0)
DEBUG_MSG("I2C bus %s registered.\n", i2c_stuff->adapter.name);
else
DEBUG_MSG("Failed to register I2C bus %s.\n",
i2c_stuff->adapter.name);
return ret;
}
void viafb_delete_i2c_buss(void *par)
{
i2c_del_adapter(&((struct viafb_par *)par)->shared->i2c_stuff.adapter);
for (i = 0; i < ARRAY_SIZE(par->shared->i2c_stuff); i++) {
struct via_i2c_stuff *i2c_stuff = &par->shared->i2c_stuff[i];
/* only remove those entries in the array that we've
* actually used (and thus initialized algo_data) */
if (i2c_stuff->adapter.algo_data == &i2c_stuff->algo)
i2c_del_adapter(&i2c_stuff->adapter);
}
}

41
drivers/video/via/via_i2c.h
View File

@ -1,5 +1,5 @@
/*
* Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
* Copyright 1998-2009 VIA Technologies, Inc. All Rights Reserved.
* Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
* This program is free software; you can redistribute it and/or
@ -24,23 +24,38 @@
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
enum via_i2c_type {
VIA_I2C_NONE,
VIA_I2C_I2C,
VIA_I2C_GPIO,
};
/* private data for each adapter */
struct via_i2c_adap_cfg {
enum via_i2c_type type;
u_int16_t io_port;
u_int8_t ioport_index;
};
struct via_i2c_stuff {
u16 i2c_port; /* GPIO or I2C port */
struct i2c_adapter adapter;
struct i2c_algo_bit_data algo;
};
#define I2CPORT 0x3c4
#define I2CPORTINDEX 0x31
#define GPIOPORT 0x3C4
#define GPIOPORTINDEX 0x2C
#define I2C_BUS 1
#define GPIO_BUS 2
#define DELAYPORT 0x3C3
enum viafb_i2c_adap {
VIA_I2C_ADAP_26,
VIA_I2C_ADAP_31,
VIA_I2C_ADAP_25,
VIA_I2C_ADAP_2C,
VIA_I2C_ADAP_3D,
};
int viafb_i2c_readbyte(u8 slave_addr, u8 index, u8 *pdata);
int viafb_i2c_writebyte(u8 slave_addr, u8 index, u8 data);
int viafb_i2c_readbytes(u8 slave_addr, u8 index, u8 *buff, int buff_len);
int viafb_create_i2c_bus(void *par);
void viafb_delete_i2c_buss(void *par);
int viafb_i2c_readbyte(u8 adap, u8 slave_addr, u8 index, u8 *pdata);
int viafb_i2c_writebyte(u8 adap, u8 slave_addr, u8 index, u8 data);
int viafb_i2c_readbytes(u8 adap, u8 slave_addr, u8 index, u8 *buff, int buff_len);
struct viafb_par;
int viafb_create_i2c_busses(struct viafb_par *par);
void viafb_delete_i2c_busses(struct viafb_par *par);
#endif /* __VIA_I2C_H__ */

6
drivers/video/via/viafbdev.c
View File

@ -1775,7 +1775,7 @@ static int __devinit via_pci_probe(struct pci_dev *pdev,
viafb_dual_fb = 0;
/* Set up I2C bus stuff */
rc = viafb_create_i2c_bus(viaparinfo);
rc = viafb_create_i2c_busses(viaparinfo);
if (rc)
goto out_fb_release;
@ -1964,7 +1964,7 @@ out_fb1_release:
out_unmap_screen:
iounmap(viafbinfo->screen_base);
out_delete_i2c:
viafb_delete_i2c_buss(viaparinfo);
viafb_delete_i2c_busses(viaparinfo);
out_fb_release:
framebuffer_release(viafbinfo);
return rc;
@ -1980,7 +1980,7 @@ static void __devexit via_pci_remove(struct pci_dev *pdev)
iounmap((void *)viafbinfo->screen_base);
iounmap(viaparinfo->shared->engine_mmio);
viafb_delete_i2c_buss(viaparinfo);
viafb_delete_i2c_busses(viaparinfo);
framebuffer_release(viafbinfo);
if (viafb_dual_fb)

4
drivers/video/via/viafbdev.h
View File

@ -37,11 +37,13 @@
#define VERSION_OS 0 /* 0: for 32 bits OS, 1: for 64 bits OS */
#define VERSION_MINOR 4
#define VIAFB_NUM_I2C 5
struct viafb_shared {
struct proc_dir_entry *proc_entry; /*viafb proc entry */
/* I2C stuff */
struct via_i2c_stuff i2c_stuff;
struct via_i2c_stuff i2c_stuff[VIAFB_NUM_I2C];
/* All the information will be needed to set engine */
struct tmds_setting_information tmds_setting_info;

28
drivers/video/via/vt1636.c
View File

@ -27,9 +27,8 @@ u8 viafb_gpio_i2c_read_lvds(struct lvds_setting_information
{
u8 data;
viaparinfo->shared->i2c_stuff.i2c_port = plvds_chip_info->i2c_port;
viafb_i2c_readbyte(plvds_chip_info->lvds_chip_slave_addr, index, &data);
viafb_i2c_readbyte(plvds_chip_info->i2c_port,
plvds_chip_info->lvds_chip_slave_addr, index, &data);
return data;
}
@ -39,14 +38,13 @@ void viafb_gpio_i2c_write_mask_lvds(struct lvds_setting_information
{
int index, data;
viaparinfo->shared->i2c_stuff.i2c_port = plvds_chip_info->i2c_port;
index = io_data.Index;
data = viafb_gpio_i2c_read_lvds(plvds_setting_info, plvds_chip_info,
index);
data = (data & (~io_data.Mask)) | io_data.Data;
viafb_i2c_writebyte(plvds_chip_info->lvds_chip_slave_addr, index, data);
viafb_i2c_writebyte(plvds_chip_info->i2c_port,
plvds_chip_info->lvds_chip_slave_addr, index, data);
}
void viafb_init_lvds_vt1636(struct lvds_setting_information
@ -159,7 +157,7 @@ void viafb_disable_lvds_vt1636(struct lvds_setting_information
}
}
bool viafb_lvds_identify_vt1636(void)
bool viafb_lvds_identify_vt1636(u8 i2c_adapter)
{
u8 Buffer[2];
@ -170,22 +168,22 @@ bool viafb_lvds_identify_vt1636(void)
VT1636_LVDS_I2C_ADDR;
/* Check vendor ID first: */
viafb_i2c_readbyte((u8) viaparinfo->chip_info->lvds_chip_info.
lvds_chip_slave_addr,
viafb_i2c_readbyte(i2c_adapter,
(u8) viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr,
0x00, &Buffer[0]);
viafb_i2c_readbyte((u8) viaparinfo->chip_info->lvds_chip_info.
lvds_chip_slave_addr,
viafb_i2c_readbyte(i2c_adapter,
(u8) viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr,
0x01, &Buffer[1]);
if (!((Buffer[0] == 0x06) && (Buffer[1] == 0x11)))
return false;
/* Check Chip ID: */
viafb_i2c_readbyte((u8) viaparinfo->chip_info->lvds_chip_info.
lvds_chip_slave_addr,
viafb_i2c_readbyte(i2c_adapter,
(u8) viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr,
0x02, &Buffer[0]);
viafb_i2c_readbyte((u8) viaparinfo->chip_info->lvds_chip_info.
lvds_chip_slave_addr,
viafb_i2c_readbyte(i2c_adapter,
(u8) viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr,
0x03, &Buffer[1]);
if ((Buffer[0] == 0x45) && (Buffer[1] == 0x33)) {
viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =

2
drivers/video/via/vt1636.h
View File

@ -22,7 +22,7 @@
#ifndef _VT1636_H_
#define _VT1636_H_
#include "chip.h"
bool viafb_lvds_identify_vt1636(void);
bool viafb_lvds_identify_vt1636(u8 i2c_adapter);
void viafb_init_lvds_vt1636(struct lvds_setting_information
*plvds_setting_info, struct lvds_chip_information *plvds_chip_info);
void viafb_enable_lvds_vt1636(struct lvds_setting_information