本帖最后由 andyandy 于 2018-7-5 08:20 编辑
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0x68191002 HDMI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。
C40304 Pitcairn PRO A1 GDDR5 64Mx32 2GB Subsystem Vendor ID: 174b Subsystem ID: e221 Object Header Structure Size: 355 Connector Object Table Offset: 48 encoderobj id [0x21] which is [INTERNAL_UNIPHY2 (osx txmit 0x22[duallink 0x2] enc 0x5)] linkb: true Connector Object Id [4] which is [DVI_D] encoderobj id [0x20] which is [INTERNAL_UNIPHY1 (osx txmit 0x11[duallink 0x1] enc 0x2)] linkb: false Connector Object Id [2] which is [DVI_I] encoderobj id [0x1e] which is [INTERNAL_UNIPHY (osx txmit 0x10[duallink 0x0] enc 0x0)] linkb: false Connector Object Id [2] which is [DVI_I] encoderobj id [0x15] which is [INTERNAL_KLDSCP_DAC1 (osx txmit 0x00 enc 0x10?)]linkb: false 然后复制redsock_bios_decoder到桌面,终端输入
- ./radeon_bios_decode< aaa.rom > connector.txt
复制代码得到connector.txt,接口数据如下: Encoder[@offset 45384]: INTERNAL_UNIPHY2 (0x21) i2cid[@offset 45507]: 0x92, OSX senseid: 0x3 Connector at index 2 Type[@offset 45390]: DVI-D (3) Encoder[@offset 45394]: INTERNAL_UNIPHY1 (0x20) i2cid[@offset 45534]: 0x94, OSX senseid: 0x5 Connector at index 3 Type[@offset 45400]: DVI-I (2) Encoder[@offset 45404]: INTERNAL_UNIPHY (0x1e) i2cid[@offset 45571]: 0x95, OSX senseid: 0x6 Connector 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 senseid DP 12 04 01 HDMI 22 05 03 DVI-D 11 02 05 DVI-I 10 00 06 DVI-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。
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: 0200 LVDS 0400 DVI-I 1000 VGA 8000 S-Video 0002 DVI 0004 Displayport 0008 HDMI
于是得出 00040000040300000001010112040401 DP 00040000040300000001020112040301 DP 04000000140200000001030011020205 DVI-D 00080000040200000001040022050103 HDMI (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
- Method (_DSM, 4, NotSerialized)
- {
- Store (Package (0x0C)
- {
- "device-id",
- Buffer (0x04)
- {
- 0x18, 0x68, 0x00, 0x00
- },
- "@0,name",
- Buffer (0x08)
- {
- "ATY,Aji"
-
- 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)
- }
- }
- }
复制代码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。
HD7850.zip
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