i.MX ProcessorsのトピックIMX6Q drive the LVDS screen ,but can not light up...

IMX6Q drive the LVDS screen ,but can not light up...

xiaobinwu — Fri, 08 Jan 2016 09:54:49 GMT

I have program the kernel source code and the uboot source code with the L3.0.35_4.1.0_130816_source.tar.gz . Then I program the kernel image and uboot image

with the source code . I download the Image ,uboot.bin and the rootfs.tar.bz2 with Mfgtools. Then I boot the Linux system after I config the boot mode .

I have make the following changes with the uboot :

In the file : board/freescale/mx6q_sabresd/mx6q_sabresd.c

1.find the struct :fb_videomode ,change as following:

{

"LDB-XGA", 60, 1024, 768, 15385,

220, 40,

21, 7,

60, 10,

FB_VMODE_NONINTERLACED,

FB_MODE_IS_DETAILED,

}

2.find the position that use 'ipuv3_fb_init',change the parameter 'IPU_PIX_FMT_RGB666' as'IPU_PIX_FMT_RGB24'

The kernel that I have changed as following :

In the file :arch/arm/mach_mx6/ board-mx6q_sabresd.c

find 'ipuv3_fb_platform_data sabresd_fb_data',then change as following:

static struct ipuv3_fb_platform_data sabresd_fb_data[] = {

{ /*fb0*/

.disp_dev = "ldb",

.interface_pix_fmt = IPU_PIX_FMT_RGB666, change as:IPU_PIX_FMT_RGB24

.mode_str = "LDB-XGA",

.default_bpp = 16, change as :default_bpp = 24

.int_clk = false,

.late_init = false,

}, {

.disp_dev = "ldb",

.interface_pix_fmt = IPU_PIX_FMT_RGB666,

.mode_str = "LDB-XGA",

.default_bpp = 16,

.int_clk = false,

};

find 'fsl_mxc_ldb_platform_data ldb_data' then change as following :

static struct fsl_mxc_ldb_platform_data ldb_data = {

.ipu_id = 1, change as : ipu_id = 0

.disp_id = 1,

.ext_ref = 1,

.mode = LDB_SEP1, i do not know if here need to change

.sec_ipu_id = 1, changge as :sec_ipu_id = 0

.sec_disp_id = 0,

};

I set the following parameters in the uboot: setenv bootargs video=mxcfb0:dev=ldb,LDB-XGA,if=RGB24,fbpix=RGB32,ldb=spl0,fbmem=10M

I use lvds0 as the image :

the screen I us is G104X1 - L03.

Re: IMX6Q drive the LVDS screen ,but can not light up...

xiaobinwu — Fri, 08 Jan 2016 09:56:53 GMT

The lvds screen can not light up ,if there anyone meet the problem?

Re: IMX6Q drive the LVDS screen ,but can not light up...

dehuanxin — Sat, 09 Jan 2016 20:36:02 GMT

kernel boot command?

Re: IMX6Q drive the LVDS screen ,but can not light up...

igorpadykov — Sun, 10 Jan 2016 09:35:14 GMT

this lcd was used with i.MX53 on below link, i.MX53 has similar ldb

module as i.MX6.

en:arm:tqma53:linux:how_to [TQ Support Wiki]

Best regards

igor

Re: IMX6Q drive the LVDS screen ,but can not light up...

mohammedazlum — Mon, 11 Jan 2016 05:05:00 GMT

Hello,

1. Have you configured 65 Mhz CLK and checked through CRO ?

2. Please probe the lines LVDS_TX0_+ and -, LVDS0_TX1_+ and -, LVDS0_TX2_+ and -, LVDS0_TX3_+ and -, LVDS0_CLK_+ and - using CRO and share the waveforms.

3. Whether the LCD set-up have PWM and Enable pins options ? Did you drive those pins properly ?

Regards,

Mohammed Azlum

Re: IMX6Q drive the LVDS screen ,but can not light up...

xiaobinwu — Tue, 12 Jan 2016 06:38:08 GMT

U-Boot 2009.08 (Jan 04 2016 - 22:21:06)

CPU: Freescale i.MX6 family TO1.5 at 792 MHz

Thermal sensor with ratio = 184

Temperature: 36 C, calibration data 0x58f4d97d

mx6q pll1: 792MHz

mx6q pll2: 528MHz

mx6q pll3: 480MHz

mx6q pll8: 50MHz

ipg clock : 66000000Hz

ipg per clock : 66000000Hz

uart clock : 80000000Hz

cspi clock : 60000000Hz

ahb clock : 132000000Hz

axi clock : 264000000Hz

emi_slow clock: 132000000Hz

ddr clock : 528000000Hz

usdhc1 clock : 198000000Hz

usdhc2 clock : 198000000Hz

usdhc3 clock : 198000000Hz

usdhc4 clock : 198000000Hz

nfc clock : 24000000Hz

Board: i.MX6Q-SABRESD: unknown-board Board: 0x63015 [WDOG ]

Boot Device: MMC

I2C: ready

DRAM: 1 GB

MMC: FSL_USDHC: 0,FSL_USDHC: 1,FSL_USDHC: 2,FSL_USDHC: 3

In: serial

Out: serial

Err: serial

Net: got MAC address from IIM: 00:00:00:00:00:00

FEC0 [PRIME]

Hit any key to stop autoboot: 0

MX6Q SABRESD U-Boot > printenv

bootdelay=3

baudrate=115200

ipaddr=192.168.1.103

serverip=192.168.1.101

netmask=255.255.255.0

loadaddr=0x10800000

rd_loadaddr=(0x1300000)

netdev=eth0

ethprime=FEC0

uboot=u-boot.bin

kernel=uImage

nfsroot=/opt/eldk/arm

bootargs_base=setenv bootargs console=ttymxc0,115200

bootargs_nfs=setenv bootargs ${bootargs} root=/dev/nfs ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp

bootcmd_net=run bootargs_base bootargs_nfs; tftpboot ${loadaddr} ${kernel}; bootm

bootargs_mmc=setenv bootargs ${bootargs} ip=dhcp root=/dev/mmcblk0p1 rootwait

bootcmd_mmc=run bootargs_base bootargs_mmc; mmc dev 3; mmc read ${loadaddr} 0x800 0x2000; bootm

ethact=FEC0

bootcmd=run bootcmd_mmc

bootargs=init=/init video=mxcfb0:dev=ldb,LDB-XGA,if=RGB24,bpp=24,ldb=sin0 fbmem=10M

stdin=serial

stdout=serial

stderr=serial

Environment size: 788/8188 bytes

MX6Q SABRESD U-Boot > reset

resetting ...



U-Boot 2009.08 (Jan 04 2016 - 22:21:06)

CPU: Freescale i.MX6 family TO1.5 at 792 MHz

Thermal sensor with ratio = 184

Temperature: 41 C, calibration data 0x58f4d97d

mx6q pll1: 792MHz

mx6q pll2: 528MHz

mx6q pll3: 480MHz

mx6q pll8: 50MHz

ipg clock : 66000000Hz

ipg per clock : 66000000Hz

uart clock : 80000000Hz

cspi clock : 60000000Hz

ahb clock : 132000000Hz

axi clock : 264000000Hz

emi_slow clock: 132000000Hz

ddr clock : 528000000Hz

usdhc1 clock : 198000000Hz

usdhc2 clock : 198000000Hz

usdhc3 clock : 198000000Hz

usdhc4 clock : 198000000Hz

nfc clock : 24000000Hz

Board: i.MX6Q-SABRESD: unknown-board Board: 0x63015 [WDOG ]

Boot Device: MMC

I2C: ready

DRAM: 1 GB

MMC: FSL_USDHC: 0,FSL_USDHC: 1,FSL_USDHC: 2,FSL_USDHC: 3

In: serial

Out: serial

Err: serial

Net: got MAC address from IIM: 00:00:00:00:00:00

FEC0 [PRIME]

Hit any key to stop autoboot: 0

mmc3(part 0) is current device

MMC read: dev # 3, block # 2048, count 8192 ... 8192 blocks read: OK

## Booting kernel from Legacy Image at 10800000 ...

Image Name: Linux-3.0.35-2666-gbdde708

Image Type: ARM Linux Kernel Image (uncompressed)

Data Size: 3861116 Bytes = 3.7 MB

Load Address: 10008000

Entry Point: 10008000

Verifying Checksum ... OK

Loading Kernel Image ... OK

Starting kernel ...

Uncompressing Linux... done, booting the kernel.

Linux version 3.0.35-2666-gbdde708 (root@ubuntu) (gcc version 4.6.2 20110630 (prerelease) (Freescale MAD -- Linaro 2011.07 -- Built at 2011/08/10 09:20) ) #7 SMP PREEMPT Mon Jan 4 22:39:24 PST 2016

CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c53c7d

CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache

Machine: Freescale i.MX 6Quad/DualLite/Solo Sabre-SD Board

Ignoring unrecognised tag 0x54410008

Memory policy: ECC disabled, Data cache writealloc

CPU identified as i.MX6Q, unknown revision

PERCPU: Embedded 7 pages/cpu @8c008000 s5440 r8192 d15040 u32768

Built 1 zonelists in Zone order, mobility grouping on. Total pages: 194560

Kernel command line: console=ttymxc0,115200 ip=dhcp root=/dev/mmcblk0p1 rootwait

PID hash table entries: 4096 (order: 2, 16384 bytes)

Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)

Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)

Memory: 512MB 256MB = 768MB total

Memory: 765764k/765764k available, 282812k reserved, 0K highmem

Virtual kernel memory layout:

vector : 0xffff0000 - 0xffff1000 ( 4 kB)

fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)

DMA : 0xf4600000 - 0xffe00000 ( 184 MB)

vmalloc : 0xc0800000 - 0xf2000000 ( 792 MB)

lowmem : 0x80000000 - 0xc0000000 (1024 MB)

pkmap : 0x7fe00000 - 0x80000000 ( 2 MB)

modules : 0x7f000000 - 0x7fe00000 ( 14 MB)

.init : 0x80008000 - 0x8003b000 ( 204 kB)

.text : 0x8003b000 - 0x80a8e8e4 (10575 kB)

.data : 0x80a90000 - 0x80af3e40 ( 400 kB)

.bss : 0x80af3e64 - 0x80b41d80 ( 312 kB)

SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=4, Nodes=1

Preemptible hierarchical RCU implementation.

NR_IRQS:624

MXC GPIO hardware

sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 1431655ms

arm_max_freq=1GHz

MXC_Early serial console at MMIO 0x2020000 (options '115200')

bootconsole [ttymxc0] enabled

Console: colour dummy device 80x30

Calibrating delay loop... 1581.05 BogoMIPS (lpj=7905280)

pid_max: default: 32768 minimum: 301

Mount-cache hash table entries: 512

CPU: Testing write buffer coherency: ok

hw perfevents: enabled with ARMv7 Cortex-A9 PMU driver, 7 counters available

CPU1: Booted secondary processor

CPU2: Booted secondary processor

CPU3: Booted secondary processor

Brought up 4 CPUs

SMP: Total of 4 processors activated (6324.22 BogoMIPS).

print_constraints: dummy:

NET: Registered protocol family 16

print_constraints: vddpu: 725 <--> 1300 mV at 700 mV fast normal

print_constraints: vddcore: 725 <--> 1300 mV at 1150 mV fast normal

print_constraints: vddsoc: 725 <--> 1300 mV at 1200 mV fast normal

print_constraints: vdd2p5: 2000 <--> 2775 mV at 2400 mV fast normal

print_constraints: vdd1p1: 800 <--> 1400 mV at 1100 mV fast normal

print_constraints: vdd3p0: 2625 <--> 3400 mV at 3000 mV fast normal

hw-breakpoint: found 6 breakpoint and 1 watchpoint registers.

hw-breakpoint: 1 breakpoint(s) reserved for watchpoint single-step.

hw-breakpoint: maximum watchpoint size is 4 bytes.

L310 cache controller enabled

l2x0: 16 ways, CACHE_ID 0x410000c7, AUX_CTRL 0x02070000, Cache size: 1048576 B

bio: create slab <bio-0> at 0

mxs-dma mxs-dma-apbh: initialized

print_constraints: SPKVDD: 4200 mV

print_constraints: vmmc: 3300 mV

SCSI subsystem initialized

spi_imx imx6q-ecspi.0: probed

usbcore: registered new interface driver usbfs

usbcore: registered new interface driver hub

usbcore: registered new device driver usb

Freescale USB OTG Driver loaded, $Revision: 1.55 $

mc_pfuze 1-0008: recv failed!:-5,80

mc_pfuze: probe of 1-0008 failed with error -1

imx-ipuv3 imx-ipuv3.0: IPU DMFC NORMAL mode: 1(0~1), 5B(4,5), 5F(6,7)

imx-ipuv3 imx-ipuv3.1: IPU DMFC NORMAL mode: 1(0~1), 5B(4,5), 5F(6,7)

mxc_mipi_csi2 mxc_mipi_csi2: i.MX MIPI CSI2 driver probed

mxc_mipi_csi2 mxc_mipi_csi2: i.MX MIPI CSI2 dphy version is 0x3130302a

MIPI CSI2 driver module loaded

Advanced Linux Sound Architecture Driver Version 1.0.24.

Bluetooth: Core ver 2.16

NET: Registered protocol family 31

Bluetooth: HCI device and connection manager initialized

Bluetooth: HCI socket layer initialized

Bluetooth: L2CAP socket layer initialized

Bluetooth: SCO socket layer initialized

cfg80211: Calling CRDA to update world regulatory domain

max17135 2-0048: PMIC MAX17135 for eInk display

i2c-core: driver [max17135] using legacy suspend method

i2c-core: driver [max17135] using legacy resume method

Switching to clocksource mxc_timer1

NET: Registered protocol family 2

IP route cache hash table entries: 32768 (order: 5, 131072 bytes)

TCP established hash table entries: 131072 (order: 8, 1048576 bytes)

TCP bind hash table entries: 65536 (order: 7, 786432 bytes)

TCP: Hash tables configured (established 131072 bind 65536)

TCP reno registered

UDP hash table entries: 512 (order: 2, 16384 bytes)

UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)

NET: Registered protocol family 1

RPC: Registered named UNIX socket transport module.

RPC: Registered udp transport module.

RPC: Registered tcp transport module.

RPC: Registered tcp NFSv4.1 backchannel transport module.

PMU: registered new PMU device of type 0

Static Power Management for Freescale i.MX6

wait mode is enabled for i.MX6

cpaddr = c0880000 suspend_iram_base=c091c000

PM driver module loaded

IMX usb wakeup probe

add wake up source irq 75

IMX usb wakeup probe

cpu regulator mode:ldo_enable

i.MXC CPU frequency driver

JFFS2 version 2.2. (NAND) 漏 2001-2006 Red Hat, Inc.

msgmni has been set to 1495

alg: No test for stdrng (krng)

io scheduler noop registered

io scheduler deadline registered

io scheduler cfq registered (default)

mxc_mipi_dsi mxc_mipi_dsi: i.MX MIPI DSI driver probed

MIPI DSI driver module loaded

mxc_sdc_fb mxc_sdc_fb.0: register mxc display driver ldb

_regulator_get: get() with no identifier

imx-ipuv3 imx-ipuv3.0: IPU DMFC DP HIGH RESOLUTION: 1(0,1), 5B(2~5), 5F(6,7)

Console: switching to colour frame buffer device 128x48

mxc_sdc_fb mxc_sdc_fb.1: register mxc display driver ldb

mxc_sdc_fb mxc_sdc_fb.2: register mxc display driver lcd

mxc_sdc_fb mxc_sdc_fb.2: ipu0-di0 already in use

mxc_sdc_fb: probe of mxc_sdc_fb.2 failed with error -16

mxc_sdc_fb mxc_sdc_fb.3: register mxc display driver ldb

mxc_sdc_fb mxc_sdc_fb.3: ipu0-di0 already in use

mxc_sdc_fb: probe of mxc_sdc_fb.3 failed with error -16

imx-sdma imx-sdma: loaded firmware 1.1

imx-sdma imx-sdma: initialized

Serial: IMX driver

imx-uart.2: ttymxc2 at MMIO 0x21ec000 (irq = 60) is a IMX

imx-uart.0: ttymxc0 at MMIO 0x2020000 (irq = 58) is a IMX

console [ttymxc0] enabled, bootconsole disabled

loop: module loaded

No sata disk.

m25p80 spi0.0: unrecognized JEDEC id ffffff

GPMI NAND driver registered. (IMX)

vcan: Virtual CAN interface driver

CAN device driver interface

flexcan netdevice driver

FEC Ethernet Driver

fec_enet_mii_bus: probed

ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver

fsl-ehci fsl-ehci.0: Freescale On-Chip EHCI Host Controller

fsl-ehci fsl-ehci.0: new USB bus registered, assigned bus number 1

fsl-ehci fsl-ehci.0: irq 75, io base 0x02184000

fsl-ehci fsl-ehci.0: USB 2.0 started, EHCI 1.00

hub 1-0:1.0: USB hub found

hub 1-0:1.0: 1 port detected

add wake up source irq 72

fsl-ehci fsl-ehci.1: Freescale On-Chip EHCI Host Controller

fsl-ehci fsl-ehci.1: new USB bus registered, assigned bus number 2

fsl-ehci fsl-ehci.1: irq 72, io base 0x02184200

fsl-ehci fsl-ehci.1: USB 2.0 started, EHCI 1.00

hub 2-0:1.0: USB hub found

hub 2-0:1.0: 1 port detected

Initializing USB Mass Storage driver...

usbcore: registered new interface driver usb-storage

USB Mass Storage support registered.

ARC USBOTG Device Controller driver (1 August 2005)

mousedev: PS/2 mouse device common for all mice

input: gpio-keys as /devices/platform/gpio-keys/input/input0

input: max11801_ts as /devices/platform/imx-i2c.1/i2c-1/1-0048/input/input1

egalax_ts 1-0004: egalax_ts: failed to read firmware version

egalax_ts: probe of 1-0004 failed with error -5

egalax_ts 2-0004: egalax_ts: failed to read firmware version

egalax_ts: probe of 2-0004 failed with error -5

usb 2-1: new high speed USB device number 2 using fsl-ehci

elan - Read Hello Packet Failed

elan-touch: probe of 2-0010 failed with error -22

i2c-core: driver [isl29023] using legacy suspend method

i2c-core: driver [isl29023] using legacy resume method

snvs_rtc snvs_rtc.0: rtc core: registered snvs_rtc as rtc0

i2c /dev entries driver

Linux video capture interface: v2.00

mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video16

mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video17

mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video18

hub 2-1:1.0: USB hub found

hub 2-1:1.0: 4 ports detected

mag3110 2-000e: check mag3110 chip ID

mag3110 2-000e: read chip ID 0xfffffffb is not equal to 0xc4!

mag3110: probe of 2-000e failed with error -22

i2c-core: driver [mag3110] using legacy suspend method

i2c-core: driver [mag3110] using legacy resume method

mma8451 0-001c: read chip ID 0x1 is not equal to 0x1a or 0x2a!

mma8451: probe of 0-001c failed with error -22

imx2-wdt imx2-wdt.0: IMX2+ Watchdog Timer enabled. timeout=60s (nowayout=1)

Bluetooth: Virtual HCI driver ver 1.3

Bluetooth: HCI UART driver ver 2.2

Bluetooth: HCIATH3K protocol initialized

Bluetooth: Generic Bluetooth USB driver ver 0.6

usbcore: registered new interface driver btusb

sdhci: Secure Digital Host Controller Interface driver

sdhci: Copyright(c) Pierre Ossman

mmc0: SDHCI controller on platform [sdhci-esdhc-imx.3] using DMA

mmc1: SDHCI controller on platform [sdhci-esdhc-imx.1] using DMA

mmc2: SDHCI controller on platform [sdhci-esdhc-imx.2] using DMA

mxc_vdoa mxc_vdoa: i.MX Video Data Order Adapter(VDOA) driver probed

VPU initialized

mxc_asrc registered

Galcore version 4.6.9.6622

Thermal calibration data is 0x58f4d97d

Thermal sensor with ratio = 184

Anatop Thermal registered as thermal_zone0

anatop_thermal_probe: default cooling device is cpufreq!

usbcore: registered new interface driver usbhid

usbhid: USB HID core driver

usbcore: registered new interface driver snd-usb-audio

mxc_hdmi_soc mxc_hdmi_soc.0: MXC HDMI Audio

Cirrus Logic CS42888 ALSA SoC Codec Driver

i2c-core: driver [cs42888] using legacy suspend method

i2c-core: driver [cs42888] using legacy resume method

imx-hdmi-soc-dai imx-hdmi-soc-dai.0: Failed: Load HDMI-video first.

wm8962 0-001a: Failed to get supply 'DCVDD': -19

wm8962 0-001a: Failed to request supplies: -19

wm8962 0-001a: asoc: failed to probe CODEC wm8962.0-001a: -19

asoc: failed to instantiate card wm8962-audio: -19

imx_3stack asoc driver

Initialize HDMI-audio failed. Load HDMI-video first!

ALSA device list:

No soundcards found.

mmc0: new high speed DDR MMC card at address 0001

mmcblk0: mmc0:0001 SEM08G 7.39 GiB

mmcblk0boot0: mmc0:0001 SEM08G partition 1 2.00 MiB

mmcblk0boot1: mmc0:0001 SEM08G partition 2 2.00 MiB

mmcblk0: p1

NET: Registered protocol family 26

mmcblk0boot1: unknown partition table

TCP cubic registered

mmcblk0boot0: unknown partition table

NET: Registered protocol family 17

can: controller area network core (rev 20090105 abi 8)

NET: Registered protocol family 29

can: raw protocol (rev 20090105)

can: broadcast manager protocol (rev 20090105 t)

Bluetooth: RFCOMM TTY layer initialized

Bluetooth: RFCOMM socket layer initialized

Bluetooth: RFCOMM ver 1.11

Bluetooth: BNEP (Ethernet Emulation) ver 1.3

Bluetooth: BNEP filters: protocol multicast

Bluetooth: HIDP (Human Interface Emulation) ver 1.2

lib80211: common routines for IEEE802.11 drivers

VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4

Bus freq driver module loaded

Bus freq driver Enabled

mxc_dvfs_core_probe

DVFS driver module loaded

regulator_init_complete: SPKVDD: incomplete constraints, leaving on

snvs_rtc snvs_rtc.0: setting system clock to 1970-01-01 00:02:35 UTC (155)

eth0: Freescale FEC PHY driver [Generic PHY] (mii_bus:phy_addr=1:01, irq=-1)

PHY: 1:01 - Link is Up - 1000/Full

IP-Config: Guessing netmask 255.0.0.0

IP-Config: Complete:

device=eth0, addr=62.0.0.0, mask=255.0.0.0, gw=255.255.255.255,

host=62.0.0.0, domain=, nis-domain=(none),

bootserver=255.255.255.255, rootserver=255.255.255.255, rootpath=

EXT3-fs: barriers not enabled

kjournald starting. Commit interval 5 seconds

EXT3-fs (mmcblk0p1): using internal journal

EXT3-fs (mmcblk0p1): mounted filesystem with writeback data mode

VFS: Mounted root (ext3 filesystem) on device 179:1.

Freeing init memory: 204K

starting pid 1388, tty '': '/etc/rc.d/rcS'

Mounting /proc and /sys

Starting the hotplug events dispatcher udevd

udevd (1397): /proc/1397/oom_adj is deprecated, please use /proc/1397/oom_score_adj instead.

Synthesizing initial hotplug events

Setting the hostname to freescale

Mounting filesystems

PHY: 1:01 - Link is Down

cp: write error: No space left on device

mount: mounting usbfs on /proc/bus/usb failed: No such file or directory

starting pid 3092, tty '': '/etc/rc.d/rc_gpu.S'

starting pid 3098, tty '': '/etc/rc.d/rc_mxc.S'

arm-none-linux-gnueabi-gcc (Freescale MAD -- Linaro 2011.07 -- Built at 2011/08/10 09:20) 4.6.2 20110630 (prerelease)

root filesystem built on Fri, 31 Aug 2012 11:01:55 -0500

Freescale Semiconductor, Inc.

freescale login: PHY: 1:01 - Link is Up - 1000/Full

The kernel command list above is all in my console . I think the possible problem is here

mxc_sdc_fb mxc_sdc_fb.0: register mxc display driver ldb

_regulator_get: get() with no identifier

imx-ipuv3 imx-ipuv3.0: IPU DMFC DP HIGH RESOLUTION: 1(0,1), 5B(2~5), 5F(6,7)

Console: switching to colour frame buffer device 128x48

mxc_sdc_fb mxc_sdc_fb.1: register mxc display driver ldb

mxc_sdc_fb mxc_sdc_fb.2: register mxc display driver lcd

mxc_sdc_fb mxc_sdc_fb.2: ipu0-di0 already in use

mxc_sdc_fb: probe of mxc_sdc_fb.2 failed with error -16

mxc_sdc_fb mxc_sdc_fb.3: register mxc display driver ldb

mxc_sdc_fb mxc_sdc_fb.3: ipu0-di0 already in use

mxc_sdc_fb: probe of mxc_sdc_fb.3 failed with error -16

imx-sdma imx-sdma: loaded firmware 1.1

imx-sdma imx-sdma: initialized

but I do not locate the problem in the kernel or uboot source code .

Re: IMX6Q drive the LVDS screen ,but can not light up...

xiaobinwu — Tue, 12 Jan 2016 07:16:45 GMT

Hello,

Thank your for your suggestions.

I have tested the LVDS_TX0_+ and -, LVDS0_TX1_+ and -, LVDS0_TX2_+ and -, LVDS0_TX3_+ and -, LVDS0_CLK_+ and - signals, and find that LVDS_TX0_+ and -, LVDS0_TX1_+ and -, LVDS0_TX2_+ and -, LVDS0_CLK_+ and - signals have 1.2v voltage without any waveform, LVDS0_TX3_+ and - can not test any voltage or waveform.

The LVDS0_TX3_+ and - can not test any voltage or waveform may be due to the parameter 'RGB666' in the kernel have not changed correctly.

Do you have any suggestions for me to change the parameters in kernel and u-boot source code correctly?

Thank you ! Have a great day!

xiaobin wu,

Re: IMX6Q drive the LVDS screen ,but can not light up...

xiaobinwu — Thu, 14 Jan 2016 05:55:16 GMT

Hi ,

I have solved the problem and light up the screen with LVDS interface .

The problem is that the kernel file :arch/arm/mach_mx6/ board-mx6q_sabresd.c

find 'fsl_mxc_ldb_platform_data ldb_data' and then correctly change the struct as follows :

static struct fsl_mxc_ldb_platform_data ldb_data = {

.ipu_id = 0,

.disp_id = 0,

.ext_ref = 1,

.mode = LDB_SEP0,

.sec_ipu_id = 0,

.sec_disp_id = 1,

};