ATI Radeon HD 7850修改FB完美驱动Mac OSX
ATI Radeon HD 7850修改FB完美驱动Mac OSX
修改FB完美驱动HD7850，不在显示HD 7xxx
主板：H77N-WIFI
CPU：I5 3450
显示卡：蓝宝石HD7850 2G版(四接口DP、HDMI、DVI-D、DVI-I)
DSDT内建显卡ID为6818或S/L/E下AMD7000Controller.kext和AMDRadeonX4000.kext的info加入0x68191002HDMI可以正常输出，但系统信息显示HD 7xxx ，HDMI不能输出音频，而且不能多屏输出。肯定是FB不正确所至，故此决定修改FB。
第一步修改FB：复制S/L/E下AMD7000Controller.kext到桌面。在windows下用GPU-Z另存显卡的VBIOS，名称aaa.rom，在MAC下将aaa.rom和redsock_bios_decoder复制到桌面，打开终端输入
cd ~/desktop/
./redsock_bios_decoder < aaa.rom > redsock.txt得到redsock.txt，接口数据如下：21P0400.S03:C40304 Pitcairn PRO A1 GDDR5 64Mx32 2GBSubsystem Vendor ID: 174b Subsystem ID: e221Object Header Structure Size: 355Connector Object Table Offset: 48Router Object Table Offset: 0Encoder Object Table Offset: fdDisplay Path Table Offset: 12Connector Object Id which is encoderobj id which is enc 0x4)] linkb: falseConnector Object Id which is encoderobj id which is enc 0x5)] linkb: trueConnector Object Id which is encoderobj id which is enc 0x2)] linkb: falseConnector Object Id which is encoderobj id which is enc 0x0)] linkb: falseConnector Object Id which is encoderobj id which is linkb: false然后复制redsock_bios_decoder到桌面，终端输入
./radeon_bios_decode< aaa.rom > connector.txt 得到connector.txt，接口数据如下:ATOM BIOS Rom: SubsystemVendorID:0x174b SubsystemID: 0xe221 IOBaseAddress:0x0000 Filename:221P0400.S03 BIOSBootup Message: C40304 Pitcairn PRO A1 GDDR5 64Mx32 2GBPCI ID: 1002:6819Connector at index 0 Type[@offset 45370]: DisplayPort (10) Encoder[@offset 45374]: INTERNAL_UNIPHY2 (0x21) i2cid[@offset 45480]: 0x90, OSX senseid: 0x1Connector at index 1 Type[@offset 45380]: HDMI-A (11) Encoder[@offset 45384]: INTERNAL_UNIPHY2 (0x21) i2cid[@offset 45507]: 0x92, OSX senseid: 0x3Connector at index 2 Type[@offset 45390]: DVI-D (3) Encoder[@offset 45394]: INTERNAL_UNIPHY1 (0x20) i2cid[@offset 45534]: 0x94, OSX senseid: 0x5Connector at index 3 Type[@offset 45400]: DVI-I (2) Encoder[@offset 45404]: INTERNAL_UNIPHY (0x1e) i2cid[@offset 45571]: 0x95, OSX senseid: 0x6Connector at index 4 Type[@offset45410]: DVI-I (2) Encoder[@offset 45414]: INTERNAL_KLDSCP_DAC1 (0x15) i2cid[@offset 45571]: 0x95, OSX senseid: 0x6得出：接口 txmit enc senseidDP 12 04 01HDMI 22 05 03DVI-D 11 02 05DVI-I 10 00 06DVI-I 00 10 06到http://forge.voodooprojects.org/p/chameleon/source/tree/HEAD/trunk/i386/libsaio/ati.c查到蓝宝显卡是Aji，为4个接口。
查到Aji的原始值:00040000040300000001010112040501000400000403000000010201220504020400000014020000000103000000030600080000040200000001040011020104
接口类型 接口标志位显示特性对齐字符 txmt encd 显示顺序senseID|00 04 00 00 | 04 03 00 00|00 01 | 01 01 | 12| 04 | 05 | 01
接口类型：0200LVDS0400DVI-I1000VGA8000S-Video0002DVI0004Displayport0008HDMI
于是得出00040000040300000001010112040401DP00040000040300000001020112040301DP04000000140200000001030011020205DVI-D00080000040200000001040022050103HDMI (01为优先显示)显卡本身是DP、HDMI、DVI-D、DVI-I四个接口，为什么修改为两个相同的DP接口而不是两个DVI呢？解释是原始值前部分不能更改，只能修改后面对应部份，这个是试验过很多次又重启过很多次得出的结论，Aji原始值是两个DP接口，所以改为一样的数值就可以正常显示了，理论上HD7850虽然有四接口但只能三屏输出。用HexEdit打开桌面的ATI7000Controller.kext/Contents/MacOS/AMD7000Controller查找原版排成一行:00040000040300000001010112040501000400000403000000010201220504020400000014020000000103000000030600080000040200000001040011020104替换成修改好的一行然后保存：00040000040300000001010112040401000400000403000000010201120403010400000014020000000103001102020500080000040200000001040022050103将桌面修改好的ATI7000Controller.kext替换到S/L/E关修复权限。至此FB修改完成。
第二步DSDT加入代码并开启HDMI和DP音频:查找PEG0，在下面加入：
Method (_DSM, 4, NotSerialized)
{
Store (Package (0x0C)
{
"device-id",
Buffer (0x04)
{
0x18, 0x68, 0x00, 0x00
},
"@0,name",
Buffer (0x08)
{
"ATY,Aji"
},
"@1,name",
Buffer (0x08)
{
"ATY,Aji"
},
"@2,name",
Buffer (0x08)
{
"ATY,Aji"
},
"model",
Buffer (0x13)
{
"AMD Radeon HD 7850"
},
"hda-gfx",
Buffer (0x0A)
{
"onboard-1"
}
}, Local0)
DTGP (Arg0, Arg1, Arg2, Arg3, RefOf (Local0))
Return (Local0)
}
}
Device (HDAU)
{
Name (_ADR, One)
Method (_DSM, 4, NotSerialized)
{
Store (Package (0x02)
{
"hda-gfx",
Buffer (0x0A)
{
"onboard-1"
}
}, Local0)
DTGP (Arg0, Arg1, Arg2, Arg3, RefOf (Local0))
Return (Local0)
}
}
}DSDT内建Aji三个显示输出接口，内建四接口会黑屏。注意：如要重装系统请将DSDT的三个Aji接口数据删掉，否则黑屏，因新系统未改FB值。至此显卡完美驱动，双屏显示成功(因未有设备，理论上三屏都可以)，HDMI和DP音频输出， 系统信息显示HD7850工具和参考信息附件奉上。
附件下载：
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前排支持一下、 多谢楼主分享 {:1_1:}{:7_249:}{:7_153:}{:7_153:}{:7_153:}{:7_153:} 顶顶顶顶顶顶顶顶顶顶顶 看帖恢复室内的 grrrrrrrrg 继续支持，多谢楼主 7850修改FB完美驱动 感谢分享。。。。。。。 试一试看看好不好用 感谢反响
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