IMX6SOLO HDMI无法显示问题

[先生孟]

hello everyone:

    我在将linux 4.1.15移植到imx6solo得时候，发现一个很奇怪得问题，只要注册hdmi，内核就卡死在hdmi modelist这个地方，设备树配置如下

model = "Freescale i.MX6 RSC-940 board of INDUSTECH";
compatible = "fsl,imx6dl-sabresd","fsl,rsc-940", "fsl,imx6dl";

aliases {
mxcfb0 = &mxcfb0;
mxcfb1 = &mxcfb1;
mxcfb2 = &mxcfb2;
mxcfb3 = &mxcfb3;
};

mxcfb0: fb@0 {
compatible = "fsl,mxc_sdc_fb";
disp_dev = "hdmi";
interface_pix_fmt = "RGB24";
mode_str ="640x480M@60";
default_bpp = <32>;
int_clk = <0>;
late_init = <0>;
status = "okay";
};

mxcfb1: fb@1{
compatible = "fsl,mxc_sdc_fb";
disp_dev = "lcd";
interface_pix_fmt = "RGB24";
mode_str ="CLAA-WVGA";
default_bpp = <32>;
int_clk = <0>;
late_init = <0>;
status = "okay";
};

&hdmi_audio {
status = "okay";
};

&hdmi_cec {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_hdmi_cec>;
status = "okay";
};

&hdmi_core {
ipu_id = <0>;
disp_id = <1>;
status = "okay";
};

&hdmi_video {
fsl,phy_reg_vlev = <0x0294>;
fsl,phy_reg_cksymtx = <0x800d>;
status = "okay";
};

&mxcfb0 {
status = "okay";
};

&mxcfb1 {
status = "okay";
};

内核得打印信息是

Booting Linux on physical CPU 0x0
Linux version 4.1.15 (root@industech-virtual-machine) (gcc version 4.9.1 20140710 (prerelease) (crosstool-NG linaro-1.13.1-4.9-2014.07 - Linaro GCC 4.9-2014.07) ) #40 SMP PREEMPT Mon Nov 19 16:53:06 CST 2018
CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c53c7d
CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine model: Freescale i.MX6 RSC-910 board of INDUSTECH
Reserved memory: created CMA memory pool at 0x1c000000, size 320 MiB
Reserved memory: initialized node linux,cma, compatible id shared-dma-pool
Memory policy: Data cache writeback
CPU: All CPU(s) started in SVC mode.
PERCPU: Embedded 12 pages/cpu @8bb1f000 s17216 r8192 d23744 u49152
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 130048
Kernel command line: console=ttymxc3,115200 root=/dev/mmcblk0p2 rootwait rw video=mxcfb0:dev=hdmi,1280x720M@60,if=RGB24
PID hash table entries: 2048 (order: 1, 8192 bytes)
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Memory: 176884K/524288K available (9511K kernel code, 578K rwdata, 3268K rodata, 436K init, 476K bss, 19724K reserved, 327680K cma-reserved, 0K highmem)
Virtual kernel memory layout:
vector : 0xffff0000 - 0xffff1000 ( 4 kB)
fixmap : 0xffc00000 - 0xfff00000 (3072 kB)
vmalloc : 0xa0800000 - 0xff000000 (1512 MB)
lowmem : 0x80000000 - 0xa0000000 ( 512 MB)
pkmap : 0x7fe00000 - 0x80000000 ( 2 MB)
modules : 0x7f000000 - 0x7fe00000 ( 14 MB)
.text : 0x80008000 - 0x80c82ea4 (12780 kB)
.init : 0x80c83000 - 0x80cf0000 ( 436 kB)
.data : 0x80cf0000 - 0x80d808a0 ( 579 kB)
.bss : 0x80d83000 - 0x80dfa24c ( 477 kB)
SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
Preemptible hierarchical RCU implementation.
Additional per-CPU info printed with stalls.
RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=2.
RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
NR_IRQS:16 nr_irqs:16 16
L2C-310 erratum 769419 enabled
L2C-310 enabling early BRESP for Cortex-A9
L2C-310 full line of zeros enabled for Cortex-A9
L2C-310 ID prefetch enabled, offset 16 lines
L2C-310 dynamic clock gating enabled, standby mode enabled
L2C-310 cache controller enabled, 16 ways, 512 kB
L2C-310: CACHE_ID 0x410000c8, AUX_CTRL 0x76450001
mxc_clocksource_init 3000000
Switching to timer-based delay loop, resolution 333ns
sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 715827882841ns
clocksource mxc_timer1: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 637086815595 ns
Console: colour dummy device 80x30
Calibrating delay loop (skipped), value calculated using timer frequency.. 6.00 BogoMIPS (lpj=30000)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
CPU: Testing write buffer coherency: ok
CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
Setting up static identity map for 0x10008280 - 0x100082d8
Brought up 1 CPUs
SMP: Total of 1 processors activated (6.00 BogoMIPS).
CPU: All CPU(s) started in SVC mode.
devtmpfs: initialized
VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4
clocksource jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
pinctrl core: initialized pinctrl subsystem
NET: Registered protocol family 16
DMA: preallocated 256 KiB pool for atomic coherent allocations
cpuidle: using governor ladder
cpuidle: using governor menu
CPU identified as i.MX6DL, silicon rev 1.3
anatop_regulator 20c8000.anatop:regulator-vddcore@140: Failed to read a valid default voltage selector.
anatop_regulator: probe of 20c8000.anatop:regulator-vddcore@140 failed with error -22
anatop_regulator 20c8000.anatop:regulator-vddsoc@140: Failed to read a valid default voltage selector.
anatop_regulator: probe of 20c8000.anatop:regulator-vddsoc@140 failed with error -22
hw-breakpoint: found 5 (+1 reserved) breakpoint and 1 watchpoint registers.
hw-breakpoint: maximum watchpoint size is 4 bytes.
imx6dl-pinctrl 20e0000.iomuxc: initialized IMX pinctrl driver
mxs-dma 110000.dma-apbh: initialized
vgaarb: loaded
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
2000000.aips-bus:usbphy_nop1 supply vcc not found, using dummy regulator
2000000.aips-bus:usbphy_nop2 supply vcc not found, using dummy regulator
i2c i2c-0: IMX I2C adapter registered
i2c i2c-0: can't use DMA
i2c i2c-1: IMX I2C adapter registered
i2c i2c-1: can't use DMA
Linux video capture interface: v2.00
pps_core: LinuxPPS API ver. 1 registered
pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
PTP clock support registered
imx-ipuv3 2400000.ipu: IPU DMFC NORMAL mode: 1(0~1), 5B(4,5), 5F(6,7)
mxc_mipi_csi2 21dc000.mipi_csi: i.MX MIPI CSI2 driver probed
mxc_mipi_csi2 21dc000.mipi_csi: i.MX MIPI CSI2 dphy version is 0x3130302a
MIPI CSI2 driver module loaded
Advanced Linux Sound Architecture Driver Initialized.
Bluetooth: Core ver 2.20
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
Switched to clocksource mxc_timer1
NET: Registered protocol family 2
TCP established hash table entries: 4096 (order: 2, 16384 bytes)
TCP bind hash table entries: 4096 (order: 3, 32768 bytes)
TCP: Hash tables configured (established 4096 bind 4096)
UDP hash table entries: 256 (order: 1, 8192 bytes)
UDP-Lite hash table entries: 256 (order: 1, 8192 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.
CPU PMU: Failed to parse /soc/pmu/interrupt-affinity[0]
hw perfevents: enabled with armv7_cortex_a9 PMU driver, 7 counters available
imx rpmsg driver is registered.
Bus freq driver module loaded
futex hash table entries: 512 (order: 3, 32768 bytes)
VFS: Disk quotas dquot_6.6.0
VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
NFS: Registering the id_resolver key type
Key type id_resolver registered
Key type id_legacy registered
jffs2: version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
fuse init (API version 7.23)
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
imx-weim 21b8000.weim: Driver registered.
i.MX PCIE endpoint device driver, version 0.1
backlight supply power not found, using dummy regulator
MIPI DSI driver module loaded
MIPI DSI driver module loaded
20e0000.hdmi_video supply HDMI not found, using dummy regulator
mxc_hdmi 20e0000.hdmi_video: Detected HDMI controller 0x13:0x1a:0xa0:0xc1
fbcvt: 1280x720@60: CVT Name - .921M9
mxc_sdc_fb fb@0: registered mxc display driver hdmi
imx-ipuv3 2400000.ipu: IPU DMFC DP HIGH RESOLUTION: 1(0,1), 5B(2~5), 5F(6,7)
Console: switching to colour frame buffer device 160x45
imx-sdma 20ec000.sdma: no iram assigned, using external mem
imx-sdma 20ec000.sdma: no event needs to be remapped
imx-sdma 20ec000.sdma: loaded firmware 3.3
imx-sdma 20ec000.sdma: initialized
pfuze100-regulator 1-0008: Full layer: 2, Metal layer: 1
pfuze100-regulator 1-0008: FAB: 0, FIN: 0
pfuze100-regulator 1-0008: pfuze100 found.
mxc_hdmi 20e0000.hdmi_video: Read EDID again
wk2xxx_init,register spi return v = :0
wk2xxx_init,register spi return v = :0
2020000.serial: ttymxc0 at MMIO 0x2020000 (irq = 24, base_baud = 5000000) is a IMX
21e8000.serial: ttymxc1 at MMIO 0x21e8000 (irq = 299, base_baud = 5000000) is a IMX
21ec000.serial: ttymxc2 at MMIO 0x21ec000 (irq = 300, base_baud = 5000000) is a IMX
21f0000.serial: ttymxc3 at MMIO 0x21f0000 (irq = 301, base_baud = 5000000) is a IMX
mxc_hdmi 20e0000.hdmi_video: create default modelist

就一直卡在create default modelist这个地方，我看了mxc-hdmi.c源代码，问题出在

/* If not EDID data read, set up default modelist */
dev_info(&hdmi->pdev->dev, "create default modelist\n");

console_lock();

fb_destroy_modelist(&hdmi->fbi->modelist);

好像console_lock()函数后，就出不来了

请问大家碰到过这种问题嘛？调试了两天不知道问题在哪里，麻烦有解决问题得朋友提示一下，非常感谢！

[605242204]

您好，请问您解决该问题了吗？我也遇到了同样问题，fb0关闭，fb1可正常显示，使用fb0和您同样现象，也是console_lock()不出来，信号量存在问题。如果解决可否分享一下。

[pratik_manvar]

Hi Mr Li, Mr Joan Xie,

I am also stuck at same issue. After loading the HDMI driver it stuck somewhere in "console_lock()" function in HDMI driver. We are trying to figure out this issue since last three days.

Have you found the root cause of this issue or any solution? If yes, it would be great if you can share the solution or some inputs.

Thanks,

Pratik Manvar

[先生孟]

thank you, Mr Li

[joanxie]

in drivers/video/mxc/mxc_edid.c

const struct fb_videomode mxc_cea_mode[64], you also need to add this video forma, pls check this, and check if you set the correct timing parameter for your format