[i.MX6Q][QNX Neutrino 6.6.0]调试笔记------LVDS显示配置
QNX提供给imx6-SebreSmart的BSP默认是HDMI显示的，我板子是LVDS接显示屏的，所以需要修改显示这块。从资料介绍来看，QNX是采用了一个OpenWF的API集，具体如何实现的不关心，这里只需要关心的是如何去配置LCD的参数和时序供OpenWF使用即可
OpenWF™是一个免版税,跨平台APIs，它提供了一个底层硬件抽象接口，利用组成成分和显示硬件合成窗口系统。当有新的显示器接入，只需要通过OpenwF的显示配置API(Wfdcfg Library)提供显示器的参数。Wfdcfg Library把显示器的属性和模式提供显示驱动和屏幕，交互图如下：
![[i.MX6Q][QNX Neutrino 6.6.0]调试笔记------LVDS显示配置_第1张图片](http://img.e-com-net.com/image/info8/15b161a9499347e6a2832a59d6766f9e.jpg)
整个配置过程其实就是生成一个wfdcfg函数库供OpenWF调用
1、修改源码
wfdcfg源码目录：QNX_BSP_sabresmart/src/hardware/wfd/imx6x/wfdcfg，在该目录已经有 imx6x-hdmi目录的存在，拷贝一份hdmi为lvds
$:cp imx6x-hdmi imx6x-lvds
$:cd imx6x-lvds
$:mv hdmi.c mylvds.c根据自己LCD参数修改mylvds.c
static const struct mode modes[] = {
// 1280x720 @ 60 Hz
{
.timing = {
.pixel_clock_kHz = 74250,
.hpixels = 1280, .hfp=110, .hsw= 40, .hbp=220, // 1650 total
.vlines = 720, .vfp= 5, .vsw= 5, .vbp= 20, // 750 total
.flags = 0,
},
},
{
// marks end of list
.timing = {.pixel_clock_kHz = 0},
},
};
退出重新编译后，会在QNX_BSP_sabresmart\src\hardware\wfd\imx6x\wfdcfg\imx6x-lvds\nto\arm\dll.le.v7中生成一个wfdcfglibrary-----libwfdcfg-imx6x-lvds.so
将libwfdcfg-imx6x-lvds.so拷贝到QNX_BSP_sabresmart\prebuilt\armle-v7\usr\lib\graphics\iMX6X
2、修改配置文件
在QNX_BSP_sabresmart\prebuilt\armle-v7\usr\lib\graphics\iMX6X目录中有个graphics.conf的配置文件，可以配置LCD的模式、分辨率等等,其中的分辨率配置得在上面mylvds.c中支持
graphics.conf
begin khronos
begin egl display 1
egl-dlls = libGAL-gc320v0.so libEGL_viv.so
glesv1-dlls = libGAL-gc320v0.so libEGL_viv.so libGLES_CM_viv.so
glesv2-dlls = libGAL-gc320v0.so libEGL_viv.so libGLESv2_viv.so
vg-dlls = libGAL-gc320v0.so libEGL_viv.so libOpenVG_viv.so
glesv2-sc-dlls = libGLSLC.so
# OpenVG emulated on the 3D hardware. Runs on all known i.MX6 platforms except SoloLite.
gpu-dlls = libGalcore-3dvg.so
end egl display
begin wfd device 1
# 7" Chimei 1024x600 @60 display on LVDS0
wfd-dlls = libwfdcfg-imx6x-lvds.so libimx6xCSCgamma-generic.so libWFDimx6x.so # 其中这里添加刚刚生成的lvds库
display-type = lvds0 # 选择LVDS接口
# If you need IPU1 for capture, you can move WFD to IPU2 instead # IPU选择
ipu-index = 1
# ipu-index = 2
# Abort on vsync timeouts (used to detect PLL failure)
vsync-failure-limit = 4
# GPU driver minimum memory pool sizes in MB (2..248)
# gpu-contiguousMB = 248
gpu-contiguousMB = 64 # recommended
# gpu-contiguousMB = 2 # minimum
gpu-internalPoolMB = 6
gpu-sharedPoolMB = 2
#gpu-pm-force-power-on = true
# Options to control what debug build of driver writes to slog
debug-alloc = 0 # Logs memory allocations
debug-cscgamma = 0 # Logs CSC/Gamma correction activity
debug-idmac = 0 # Logs IDMAC parameters
debug-isr = 0 # Logs IRQ statistics
debug-pipeline = 0 # Logs pipeline activity
debug-register = 0 # Logs register activity to tracelog (not slog!)
debug-resize = 0 # Logs resizer (IPU IC PP) activity
debug-trace = 0 # Logs entry into each WFD function
debug-misc = 0 # Logs everything else
end wfd device
end khronos
begin winmgr
begin globals
blit-config = gc320v0
blits-logsize = 4096
end globals
begin display internal
# Innolux display only
video-mode = 1024 x 600 @ 60 # 适应LCD的分辨率
end display
begin class framebuffer
display = internal
pipeline = 2
format = rgba8888 # 显示格式，这个很关键，修改过这个参数，在后面吃过大亏
usage = gc320v0
end class
end winmgr3、修改Buildfile
在Buildfile的Graphics support部分，添加lvds库文件
[search=../install/armle-v7/usr/lib/graphics/iMX6X] /usr/lib/graphics/iMX6X/libwfdcfg-imx6x-lvds.so=libwfdcfg-imx6x-lvds.so在QNX_BSP根目录 make clean 然后 make,生成新的QNX-IFS，拷贝到SD卡中启动板子：
Welcome to QNX Neutrino Initial Program Loader for Freescale i.MX6Q Sabre-Smart (ARM Cortex-A9 MPCore)
SDMMC download...
load image done.
Found image @ 0x18000008
Jumping to startup @ 0x108068F8
SCU_CONFIG = 00005503, 4 cpus
L2 cache enabled
CPU0: L1 Icache: 1024x32
CPU0: L1 Dcache: 1024x32 WB
CPU0: VFP-d32 FPSID=41033094
CPU0: NEON MVFR0=10110222 MVFR1=01111111
CPU0: 412fc09a: Cortex A9 MPCore rev 10 792MHz
Detected i.MX6 Dual/Quad, revision Unknown Revision
PLL1 - System : 792MHz
PLL2 - System Bus : 528MHz
PLL3 - OTG USB : 480MHz
PLL4 - Audio : 36MHz
PLL5 - Video : 339MHz
PLL7 - Host USB : 480MHz
PLL8 - Enet : 50MHz
IPG clock : 66000000Hz
IPG per clock : 66000000Hz
UART clock : 80000000Hz
CSPI clock : 60000000Hz
AHB clock : 132000000Hz
AXI clock : 264000000Hz
EMI_SLOW clock: 29333333Hz
DDR clock : 528000000Hz
USDHC1 clock : 198000000Hz
USDHC2 clock : 198000000Hz
USDHC3 clock : 198000000Hz
USDHC4 clock : 198000000Hz
ENFC clock : 24000000Hz
CPU1: L1 Icache: 1024x32
CPU1: L1 Dcache: 1024x32 WB
CPU1: VFP-d32 FPSID=41033094
CPU1: NEON MVFR0=10110222 MVFR1=01111111
CPU1: 412fc09a: Cortex A9 MPCore rev 10 792MHz
CPU2: L1 Icache: 1024x32
CPU2: L1 Dcache: 1024x32 WB
CPU2: VFP-d32 FPSID=41033094
CPU2: NEON MVFR0=10110222 MVFR1=01111111
CPU2: 412fc09a: Cortex A9 MPCore rev 10 792MHz
CPU3: L1 Icache: 1024x32
CPU3: L1 Dcache: 1024x32 WB
CPU3: VFP-d32 FPSID=41033094
CPU3: NEON MVFR0=10110222 MVFR1=01111111
CPU3: 412fc09a: Cortex A9 MPCore rev 10 792MHz
cpu_startnext: cpu1 -> fc411d58
cpu_startnext: cpu2 -> fc411d58
cpu_startnext: cpu3 -> fc411d58
System page at phys:10023000 user:fc410000 kern:fc410000
Starting next program at vfe054e3c
cpu_startnext: cpu0 -> fe054e3c
Welcome to QNX Neutrino 6.6.0 on the i.mx6 Smart-Device (ARM Cortex-A9 MPCore)
Starting watchdog...
Starting SD3 memory card driver...
Starting SD1 (microSD connector) memory card driver...
Unable to access "/dev/sd20" (2)
setting env variables.
Starting Screen Graphics...
Mempool Map addr range[28100000-2c700000]
Mempool Map paddr range[4b600000-4fc00000]
[Interrupt] Attached irqLine 41 with id 6.
[Interrupt] Attached irqLine 42 with id 7.
Attached resmgr to /dev/galcore with id:0.
done.
Launching devb-umass...
done
# 从上面打印信息来看Screen已经启动OK了，运行OpenGL的测试程序gles2-gears，可以看到三个齿轮旋转，色差没什么都正常就说明Wfdcfg Library是OK了