Hi,all
I have a display issue,information is as follows:
Linux: L3.0.35
U-boot:2009.08
CPU:imx6 solo
LCD panel: 1920*720 KYOCERA display
dual lvds(channel 0 and channel 1)
1) u-boot parameters:
setenv bootargs_mmc 'setenv bootargs ${bootargs} root=/dev/mmcblk0p1 rootwait rw video=mxcfb0:dev=ldb,LDB-KY720P,if=RGB24,bpp=32 ldb=spl0 quiet'
==> 'ldb=spl1' is also used,but the result is the same.
2) I add the following code to struct fb_videomode ldb_modedb[] of ldb.c :
{
"LDB-KY720P", 60, 1920, 720, 8230, /* KYOCERA display */
60, 60,
70, 70,
45, 40,
0,
FB_VMODE_NONINTERLACED,
FB_MODE_IS_DETAILED,},
3) fbset is as follows:
root@(none) /$ fbset
mode "1920x720-65"
# D: 121.507 MHz, H: 58.277 kHz, V: 64.752 Hz
geometry 1920 720 1920 720 32
timings 8230 60 60 70 70 45 40
accel false
rgba 8/16,8/8,8/0,8/24
endmode
==>also,use fbset to set different parameter,the result is : the following 3 display ISSUEs changes,but still abnormal.
4) the display's COMS TCON mode AC Electrical Characteristics is as follows:
it follows VESA bit mapping.
5) dmesg is as follows:
root@(none) /$ dmesg
[ 0.000000] Linux version 3.0.35-2666-gbdde708 (chad@chad-laptop) (gcc version 4.6.2 20110630 (prerelease) (Freescale MAD -- Linaro 2011.07 -- Built at 2011/08/10 09:20) ) #40 PREEMPT Fri Jun 22 14:49:49 CST 2018
[ 0.000000] CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c53c7d
[ 0.000000] CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache
[ 0.000000] Machine: Freescale i.MX 6Quad/DualLite/Solo Sabre-SD Board
[ 0.000000] Ignoring unrecognised tag 0x54410008
[ 0.000000] Memory policy: ECC disabled, Data cache writeback
[ 0.000000] CPU identified as i.MX6DL/SOLO, silicon rev 1.2
[ 0.000000] On node 0 totalpages: 65536
[ 0.000000] free_area_init_node: node 0, pgdat c029ecf8, node_mem_map cb800000
[ 0.000000] DMA zone: 368 pages used for memmap
[ 0.000000] DMA zone: 0 pages reserved
[ 0.000000] DMA zone: 46736 pages, LIFO batch:15
[ 0.000000] Normal zone: 656 pages used for memmap
[ 0.000000] Normal zone: 17776 pages, LIFO batch:3
[ 0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[ 0.000000] pcpu-alloc: [0] 0
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 64512
[ 0.000000] Kernel command line: console=ttymxc0,115200 nosmp root=/dev/mmcblk0p1 rootwait rw video=mxcfb0:dev=ldb,LDB-KY720P,if=RGB24,bpp=32 ldb=spl0 quiet
[ 0.000000] PID hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
[ 0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
[ 0.000000] Memory: 256MB = 256MB total
[ 0.000000] Memory: 255052k/255052k available, 269236k reserved, 0K highmem
[ 0.000000] Virtual kernel memory layout:
[ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB)
[ 0.000000] fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)
[ 0.000000] DMA : 0xf4600000 - 0xffe00000 ( 184 MB)
[ 0.000000] vmalloc : 0xe0800000 - 0xf2000000 ( 280 MB)
[ 0.000000] lowmem : 0xc0000000 - 0xe0000000 ( 512 MB)
[ 0.000000] modules : 0xbf000000 - 0xc0000000 ( 16 MB)
[ 0.000000] .init : 0xc0008000 - 0xc0023000 ( 108 kB)
[ 0.000000] .text : 0xc0023000 - 0xc0270000 (2356 kB)
[ 0.000000] .data : 0xc0270000 - 0xc029f760 ( 190 kB)
[ 0.000000] .bss : 0xc029f784 - 0xc02af864 ( 65 kB)
[ 0.000000] SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] Preemptible hierarchical RCU implementation.
[ 0.000000] NR_IRQS:624
[ 0.000000] MXC GPIO hardware
[ 0.000000] sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 1431655ms
[ 0.000000] Set periph_clk's parent to pll2_pfd_400M!
[ 0.000000] arm_max_freq=800MHz
[ 0.000000] MXC_Early serial console at MMIO 0x21f0000 (options '115200')
[ 0.000000] bootconsole [ttymxc0] enabled
[ 0.000000] Console: colour dummy device 80x30
[ 0.000373] Calibrating delay loop... 1581.05 BogoMIPS (lpj=7905280)
[ 0.090125] pid_max: default: 32768 minimum: 301
[ 0.090422] Mount-cache hash table entries: 512
[ 0.090815] CPU: Testing write buffer coherency: ok
[ 0.098004] print_constraints: dummy:
[ 0.098634] print_constraints: vddpu: 725 <--> 1300 mV at 700 mV fast normal
[ 0.098783] print_constraints: vddcore: 725 <--> 1300 mV at 1150 mV fast normal
[ 0.098912] print_constraints: vddsoc: 725 <--> 1300 mV at 1200 mV fast normal
[ 0.099045] print_constraints: vdd2p5: 2000 <--> 2775 mV at 2400 mV fast normal
[ 0.099195] print_constraints: vdd1p1: 800 <--> 1400 mV at 1100 mV fast normal
[ 0.099351] print_constraints: vdd3p0: 2625 <--> 3400 mV at 3000 mV fast normal
[ 0.101970] L310 cache controller enabled
[ 0.101985] l2x0: 16 ways, CACHE_ID 0x410000c8, AUX_CTRL 0x02050000, Cache size: 524288 B
[ 0.104178] bio: create slab <bio-0> at 0
[ 0.104786] SCSI subsystem initialized
[ 0.120201] imx-ipuv3 imx-ipuv3.0: IPU DMFC NORMAL mode: 1(0~1), 5B(4,5), 5F(6,7)
[ 0.120480] mxc_mipi_csi2 mxc_mipi_csi2: i.MX MIPI CSI2 driver probed
[ 0.120496] mxc_mipi_csi2 mxc_mipi_csi2: i.MX MIPI CSI2 dphy version is 0x3130302a
[ 0.120529] MIPI CSI2 driver module loaded
[ 0.120551] Switching to clocksource mxc_timer1
[ 0.125314] Static Power Management for Freescale i.MX6
[ 0.125325] wait mode is enabled for i.MX6
[ 0.125400] cpaddr = e0820000 suspend_iram_base=e087c000
[ 0.125489] PM driver module loaded
[ 0.125498] cpu regulator mode:ldo_enable
[ 0.125609] i.MXC CPU frequency driver
[ 0.134121] msgmni has been set to 498
[ 0.134185] io scheduler noop registered
[ 0.134195] io scheduler deadline registered
[ 0.134253] io scheduler cfq registered (default)
[ 0.134659] mxc_sdc_fb mxc_sdc_fb.0: register mxc display driver ldb
[ 0.134693] _regulator_get: get() with no identifier
[ 0.134744] lvds data width 24 111111
[ 0.144278] pixel clk = 121506000
[ 0.144309] use special clk parent
[ 0.160659] imx-ipuv3 imx-ipuv3.0: IPU DMFC DP HIGH RESOLUTION: 1(0,1), 5B(2~5), 5F(6,7)
[ 0.162325] Serial: IMX driver
[ 0.162429] imx-uart.0: ttymxc0 at MMIO 0x2020000 (irq = 58) is a IMX
[ 0.162460] console [ttymxc0] enabled, bootconsole disabled
[ 0.163099] fpga-pci.c:v1.00 2013-11-08 D. Becker/P. Gortmaker
[ 0.163111] i2c /dev entries driver
[ 0.163218] Linux video capture interface: v2.00
[ 0.163357] Video device registered: Mxc Camera #0
[ 0.163485] Video device registered: Mxc Camera #1
[ 0.163695] mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video16
[ 0.163777] mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video17
[ 0.163914] sdhci: Secure Digital Host Controller Interface driver
[ 0.163926] sdhci: Copyright(c) Pierre Ossman
[ 0.164023] mmc0: no vmmc regulator found
[ 0.164203] mmc0: SDHCI controller on platform [sdhci-esdhc-imx.3] using ADMA
[ 0.165293] mmc1: no vmmc regulator found
[ 0.167410] mmc1: SDHCI controller on platform [sdhci-esdhc-imx.1] using ADMA
[ 0.168494] mmc2: no vmmc regulator found
[ 0.170681] mmc2: SDHCI controller on platform [sdhci-esdhc-imx.2] using ADMA
[ 0.170795] mxc_vdoa mxc_vdoa: i.MX Video Data Order Adapter(VDOA) driver probed
[ 0.170905] Galcore version 4.6.9.6622
[ 0.187837] VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4
[ 0.187892] Bus freq driver module loaded
[ 0.187900] Bus freq driver Enabled
[ 0.189451] mxc_dvfs_core_probe
[ 0.189549] DVFS driver module loaded
[ 0.190117] Waiting for root device /dev/mmcblk0p1...
[ 0.342039] mmc0: new high speed DDR MMC card at address 0001
[ 0.342300] mmcblk0: mmc0:0001 DG4008 7.28 GiB
[ 0.342385] mmcblk0boot0: mmc0:0001 DG4008 partition 1 4.00 MiB
[ 0.342463] mmcblk0boot1: mmc0:0001 DG4008 partition 2 4.00 MiB
[ 0.343312] mmcblk0: p1
[ 0.346123] mmcblk0boot1: unknown partition table
[ 0.348763] mmcblk0boot0: unknown partition table
[ 0.410078] EXT4-fs (mmcblk0p1): mounting ext3 file system using the ext4 subsystem
[ 0.487679] EXT4-fs (mmcblk0p1): recovery complete
[ 0.488595] EXT4-fs (mmcblk0p1): mounted filesystem with ordered data mode. Opts: (null)
[ 0.488637] VFS: Mounted root (ext3 filesystem) on device 179:1.
[ 0.488700] Freeing init memory: 108K
[ 1.087002] pixel clk = 121506000
[ 1.087034] use special clk parent
ISSUE:
1: when the kernel boot logo appears, the background color is blue(should be black) and the logo seems abnormal.the picture is as the follows:
2: when application run,such as color bars,the white field picture has snowflake(雪花状) 。
and the color bars picture as follows,the top is black bar(but only blue color),the bottom is white bar(with snowflake).
3: other application also abnormal:
the left part should be as follow:
can you help me for some guide? thanks!
Hi zha
please look how to add 24-bit LVDS support
iMX6QD How to Add 24-bit LVDS Support in Android
Best regards
igor
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Hi,igorpadykov
Thank you for your quick reply!
The problem has been solved by replacing another board.