PROCESSOR-SDK-AM335X: DSS not supported on this SoC

Hi Yordan,

It appears that the error is generated

int __init omap_display_init(struct omap_dss_board_info *board_data)

{

int r = 0;

struct platform_device *pdev;

int i, oh_count;

const struct omap_dss_hwmod_data *curr_dss_hwmod;

struct platform_device *dss_pdev;

enum omapdss_version ver;

/* create omapdss device */

ver = omap_display_get_version();

if (ver == OMAPDSS_VER_UNKNOWN) {

pr_err("DSS not supported on this SoC\n");

return -ENODEV;

}

And that this function is returning OMAPDSS_VER_UNKNOWN

static enum omapdss_version __init omap_display_get_version(void)
{
if (cpu_is_omap24xx())
return OMAPDSS_VER_OMAP24xx;
else if (cpu_is_omap3630())
return OMAPDSS_VER_OMAP3630;
else if (cpu_is_omap34xx()) {
if (soc_is_am35xx()) {
return OMAPDSS_VER_AM35xx;
} else {
if (omap_rev() < OMAP3430_REV_ES3_0)
return OMAPDSS_VER_OMAP34xx_ES1;
else
return OMAPDSS_VER_OMAP34xx_ES3;
}
} else if (omap_rev() == OMAP4430_REV_ES1_0)
return OMAPDSS_VER_OMAP4430_ES1;
else if (omap_rev() == OMAP4430_REV_ES2_0 ||
omap_rev() == OMAP4430_REV_ES2_1 ||
omap_rev() == OMAP4430_REV_ES2_2)
return OMAPDSS_VER_OMAP4430_ES2;
else if (cpu_is_omap44xx())
return OMAPDSS_VER_OMAP4;
else if (soc_is_omap54xx())
return OMAPDSS_VER_OMAP5;
else if (soc_is_dra7xx())
return OMAPDSS_VER_DRA7xx;
else if (soc_is_am43xx())
return OMAPDSS_VER_AM43xx;
else
return OMAPDSS_VER_UNKNOWN;
}
 

Here is the log.

[    0.000000] Booting Linux on physical CPU 0x0

[    0.000000] Linux version 3.12.10-Edwards.00.00.17-ti2013.12.01 (root@ubuntu) (gcc version 4.7.3 20130226 (prerelease) (crosstool-NG linaro-1.13.1-4.7-2013.03-20130313 - Linaro GCC 2013.03) ) #4 Sat Feb 4 10:06:53 EST 2017

[    0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c53c7d

[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache

[    0.000000] Machine: Generic AM33XX (Flattened Device Tree), model: UTC Edwards 4-CPU v. 99.00.06

[    0.000000] cma: CMA: reserved 24 MiB at 8d800000

[    0.000000] Memory policy: ECC disabled, Data cache writeback

[    0.000000] CPU: All CPU(s) started in SVC mode.

[    0.000000] AM335X ES2.1 (sgx neon )

[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 64256

[    0.000000] Kernel command line: console=ttyO0,115200n8 root=/dev/mmcblk0p2 rootfstype=ext3 rw rootwait ip=off lpj=3590144 video=/dev/fb0:480x640@60 fbcon=rotate:1

[    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: 223504K/259072K available (5575K kernel code, 565K rwdata, 1784K rodata, 344K init, 235K bss, 35568K 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]     vmalloc : 0xd0800000 - 0xff000000   ( 744 MB)

[    0.000000]     lowmem  : 0xc0000000 - 0xd0000000   ( 256 MB)

[    0.000000]     pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)

[    0.000000]     modules : 0xbf000000 - 0xbfe00000   (  14 MB)

[    0.000000]       .text : 0xc0008000 - 0xc073804c   (7361 kB)

[    0.000000]       .init : 0xc0739000 - 0xc078f2f8   ( 345 kB)

[    0.000000]       .data : 0xc0790000 - 0xc081d700   ( 566 kB)

[    0.000000]        .bss : 0xc081d700 - 0xc0858410   ( 236 kB)

[    0.000000] NR_IRQS:16 nr_irqs:16 16

[    0.000000] IRQ: Found an INTC at 0xfa200000 (revision 5.0) with 128 interrupts

[    0.000000] Total of 128 interrupts on 1 active controller

[    0.000000] OMAP clockevent source: timer2 at 24000000 Hz

[    0.000000] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 178956ms

[    0.000000] OMAP clocksource: timer1 at 24000000 Hz

[    0.000000] Console: colour dummy device 80x30

[    0.000261] Calibrating delay loop (skipped) preset value.. 718.02 BogoMIPS (lpj=3590144)

[    0.000277] pid_max: default: 32768 minimum: 301

[    0.000357] Security Framework initialized

[    0.000402] Mount-cache hash table entries: 512

[    0.006950] CPU: Testing write buffer coherency: ok

[    0.007323] Setting up static identity map for 0xc0577e68 - 0xc0577ed8

[    0.008086] devtmpfs: initialized

[    0.009579] VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3

[    0.073168] omap_hwmod: debugss: _wait_target_disable failed

[    0.073802] pinctrl core: initialized pinctrl subsystem

[    0.074555] regulator-dummy: no parameters

[    0.076711] NET: Registered protocol family 16

[    0.078521] DMA: preallocated 256 KiB pool for atomic coherent allocations

[    0.080735] cpuidle: using governor ladder

[    0.080750] cpuidle: using governor menu

[    0.089058] OMAP GPIO hardware version 0.1

[    0.099239] DSS not supported on this SoC

[    0.099258] No ATAGs?

[    0.099267] hw-breakpoint: debug architecture 0x4 unsupported.

[    0.117987] bio: create slab <bio-0> at 0

[    0.129395] edma-dma-engine edma-dma-engine.0: TI EDMA DMA engine driver

[    0.130191] vbat: 5000 mV

[    0.132589] vgaarb: loaded

[    0.133588] SCSI subsystem initialized

[    0.134643] usbcore: registered new interface driver usbfs

[    0.134787] usbcore: registered new interface driver hub

[    0.134941] usbcore: registered new device driver usb

[    0.135718] omap_i2c 44e0b000.i2c: could not find pctldev for node /pinmux@44e10800/pinmux_i2c0_pins, deferring probe

[    0.135743] platform 44e0b000.i2c: Driver omap_i2c requests probe deferral

[    0.135766] omap_i2c 4802a000.i2c: could not find pctldev for node /pinmux@44e10800/pinmux_i2c1_pins, deferring probe

[    0.135779] platform 4802a000.i2c: Driver omap_i2c requests probe deferral

[    0.135797] omap_i2c 4819c000.i2c: could not find pctldev for node /pinmux@44e10800/pinmux_i2c2_pins, deferring probe

[    0.135809] platform 4819c000.i2c: Driver omap_i2c requests probe deferral

[    0.136105] pps_core: LinuxPPS API ver. 1 registered

[    0.136114] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>

[    0.136219] PTP clock support registered

[    0.138348] Switched to clocksource timer1

[    0.152792] NET: Registered protocol family 2

[    0.153359] TCP established hash table entries: 2048 (order: 2, 16384 bytes)

[    0.153403] TCP bind hash table entries: 2048 (order: 1, 8192 bytes)

[    0.153427] TCP: Hash tables configured (established 2048 bind 2048)

[    0.153488] TCP: reno registered

[    0.153500] UDP hash table entries: 256 (order: 0, 4096 bytes)

[    0.153516] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)

[    0.153681] NET: Registered protocol family 1

[    0.154018] RPC: Registered named UNIX socket transport module.

[    0.154030] RPC: Registered udp transport module.

[    0.154037] RPC: Registered tcp transport module.

[    0.154043] RPC: Registered tcp NFSv4.1 backchannel transport module.

[    0.154762] NetWinder Floating Point Emulator V0.97 (double precision)

[    0.155289] PM: Loading am335x-pm-firmware.bin

[    0.270149] NFS: Registering the id_resolver key type

[    0.270235] Key type id_resolver registered

[    0.270243] Key type id_legacy registered

[    0.270280] jffs2: version 2.2. (NAND) (SUMMARY)  Â© 2001-2006 Red Hat, Inc.

[    0.270433] msgmni has been set to 484

[    0.271733] NET: Registered protocol family 38

[    0.271773] io scheduler noop registered

[    0.271780] io scheduler deadline registered

[    0.271800] io scheduler cfq registered (default)

[    0.273479] pinctrl-single 44e10800.pinmux: 142 pins at pa f9e10800 size 568

[    0.322495] Console: switching to colour frame buffer device 60x40

[    0.328801] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled

[    0.331111] 44e09000.serial: ttyO0 at MMIO 0x44e09000 (irq = 88, base_baud = 3000000) is a OMAP UART0

[    0.931186] console [ttyO0] enabled

[    0.936064] omap_rng 48310000.rng: OMAP Random Number Generator ver. 20

[    0.950989] brd: module loaded

[    0.958214] loop: module loaded

[    0.967121] vcan: Virtual CAN interface driver

[    0.971897] CAN device driver interface

[    0.977012] c_can_platform 481d0000.d_can: c_can_platform device registered (regs=fa1d0000, irq=71)

[    0.988025] usbcore: registered new interface driver asix

[    0.993907] usbcore: registered new interface driver ax88179_178a

[    1.000459] usbcore: registered new interface driver cdc_ether

[    1.006724] usbcore: registered new interface driver r815x

[    1.012609] usbcore: registered new interface driver smsc95xx

[    1.018783] usbcore: registered new interface driver net1080

[    1.024862] usbcore: registered new interface driver cdc_subset

[    1.031194] usbcore: registered new interface driver zaurus

[    1.037233] usbcore: registered new interface driver cdc_ncm

[    1.043616] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver

[    1.050494] ehci-pci: EHCI PCI platform driver

[    1.055325] ehci-omap: OMAP-EHCI Host Controller driver

[    1.061578] usbcore: registered new interface driver cdc_wdm

[    1.067692] usbcore: registered new interface driver usb-storage

[    1.074363] usbcore: registered new interface driver usbserial

[    1.081394] mousedev: PS/2 mouse device common for all mice

[    1.088823] input: ti-tsc as /devices/ocp.2/44e0d000.tscadc/TI-am335x-tsc/input/input0

[    1.099022] omap_rtc 44e3e000.rtc: rtc core: registered 44e3e000.rtc as rtc0

[    1.106455] 44e3e000.rtc: already running

[    1.111345] i2c /dev entries driver

[    1.115130] Driver for 1-wire Dallas network protocol.

[    1.122461] omap_wdt: OMAP Watchdog Timer Rev 0x01: initial timeout 60 sec

[    1.131245] edma-dma-engine edma-dma-engine.0: allocated channel for 0:3

[    1.138288] edma-dma-engine edma-dma-engine.0: allocated channel for 0:2

[    1.145484] omap_hsmmc 481d8000.mmc: unable to get vmmc regulator -517

[    1.152374] edma-dma-engine edma-dma-engine.0: freeing channel for 2

[    1.159060] edma-dma-engine edma-dma-engine.0: freeing channel for 3

[    1.165800] platform 481d8000.mmc: Driver omap_hsmmc requests probe deferral

[    1.173742] ledtrig-cpu: registered to indicate activity on CPUs

[    1.180380] edma-dma-engine edma-dma-engine.0: allocated channel for 0:36

[    1.187541] omap-sham 53100000.sham: hw accel on OMAP rev 4.3

[    1.194611] omap-aes 53500000.aes: OMAP AES hw accel rev: 3.2

[    1.200757] edma-dma-engine edma-dma-engine.0: allocated channel for 0:5

[    1.207801] edma-dma-engine edma-dma-engine.0: allocated channel for 0:6

[    1.215946] usbcore: registered new interface driver usbhid

[    1.221825] usbhid: USB HID core driver

[    1.227689] oprofile: no performance counters

[    1.232644] oprofile: using timer interrupt.

[    1.237228] nf_conntrack version 0.5.0 (3876 buckets, 15504 max)

[    1.244114] ip_tables: (C) 2000-2006 Netfilter Core Team

[    1.249718] TCP: cubic registered

[    1.253189] Initializing XFRM netlink socket

[    1.257939] NET: Registered protocol family 10

[    1.263336] ip6_tables: (C) 2000-2006 Netfilter Core Team

[    1.269103] sit: IPv6 over IPv4 tunneling driver

[    1.274911] NET: Registered protocol family 17

[    1.279700] NET: Registered protocol family 15

[    1.284357] can: controller area network core (rev 20120528 abi 9)

[    1.290907] NET: Registered protocol family 29

[    1.295586] can: raw protocol (rev 20120528)

[    1.300073] can: broadcast manager protocol (rev 20120528 t)

[    1.306012] can: netlink gateway (rev 20130117) max_hops=1

[    1.311884] Key type dns_resolver registered

[    1.317008] cpu cpu0: cpu0 regulator not ready, retry

[    1.322442] platform cpufreq-cpu0.0: Driver cpufreq-cpu0 requests probe deferral

[    1.330799] ThumbEE CPU extension supported.

[    1.339620] at24 0-0050: 2048 byte 24c16 EEPROM, writable, 16 bytes/write

[    1.346788] omap_i2c 44e0b000.i2c: bus 0 rev0.11 at 100 kHz

[    1.354190] tps65910 1-002d: No interrupt support, no core IRQ

[    1.362164] vrtc: 1800 mV

[    1.365263] vrtc: supplied by vbat

[    1.370005] vio: at 1500 mV

[    1.373084] vio: supplied by vbat

[    1.377812] vdd_mpu: 912 <--> 1375 mV at 1325 mV

[    1.382829] vdd_mpu: supplied by vbat

[    1.387898] vdd_core: 912 <--> 1150 mV at 1137 mV

[    1.392997] vdd_core: supplied by vbat

[    1.397850] vdd3: 5000 mV

[    1.401746] vdig1: at 1800 mV

[    1.405000] vdig1: supplied by vbat

[    1.409747] vdig2: at 1800 mV

[    1.413002] vdig2: supplied by vbat

[    1.417706] vpll: at 1800 mV

[    1.420886] vpll: supplied by vbat

[    1.425506] vdac: at 1800 mV

[    1.428686] vdac: supplied by vbat

[    1.433321] vaux1: at 1800 mV

[    1.436575] vaux1: supplied by vbat

[    1.441312] vaux2: at 3300 mV

[    1.444572] vaux2: supplied by vbat

[    1.449295] vaux33: at 3300 mV

[    1.452642] vaux33: supplied by vbat

[    1.457450] vmmc_reg: 1800 <--> 3300 mV at 3300 mV

[    1.462643] vmmc_reg: supplied by vbat

[    1.469038] at24 1-0050: 2048 byte 24c16 EEPROM, writable, 16 bytes/write

[    1.476198] omap_i2c 4802a000.i2c: bus 1 rev0.11 at 400 kHz

[    1.484824] at24 2-0050: 2048 byte 24c16 EEPROM, writable, 16 bytes/write

[    1.492058] omap_i2c 4819c000.i2c: bus 2 rev0.11 at 100 kHz

[    1.498617] edma-dma-engine edma-dma-engine.0: allocated channel for 0:3

[    1.505660] edma-dma-engine edma-dma-engine.0: allocated channel for 0:2

[    1.601054] mmc0: BKOPS_EN bit is not set

[    1.607310] mmc0: new high speed MMC card at address 0001

[    1.613568] mmcblk0: mmc0:0001 8GND3R 7.28 GiB

[    1.618392] davinci_mdio 4a101000.mdio: davinci mdio revision 1.6

[    1.624778] davinci_mdio 4a101000.mdio: detected phy mask 7ffffff5

[    1.631402] mmcblk0boot0: mmc0:0001 8GND3R partition 1 4.00 MiB

[    1.637733] mmcblk0boot1: mmc0:0001 8GND3R partition 2 4.00 MiB

[    1.646657]  mmcblk0: p1 p2 p3 p4

[    1.654995] dp83640: master PTP_STS  0x0100

[    1.660060] dp83640: master PTP_ESTS 0x00fd

[    1.665062] dp83640: slave  PTP_STS  0x0000

[    1.670072] dp83640: slave  PTP_ESTS 0x0000

[    1.674537]  mmcblk0boot1: unknown partition table

[    1.680080] dp83640: slave offset 909960 nanoseconds

[    1.687540]  mmcblk0boot0: unknown partition table

[    1.693451] libphy: 4a101000.mdio: probed

[    1.697685] davinci_mdio 4a101000.mdio: phy[1]: device 4a101000.mdio:01, driver NatSemi DP83640

[    1.706848] davinci_mdio 4a101000.mdio: phy[3]: device 4a101000.mdio:03, driver NatSemi DP83640

[    1.715982] davinci_mdio 4a101000.mdio: phy[31]: device 4a101000.mdio:1f, driver NatSemi DP83640

[    1.725980] Detected MACID = 80:30:dc:90:88:2d

[    1.731959] cpsw: Detected MACID = 80:30:dc:90:88:2f

[    1.738727] omap_rtc 44e3e000.rtc: setting system clock to 2015-07-04 08:03:10 UTC (1435996990)

[    1.747943] ### dt-test ### No testcase data in device tree; not running tests

[    1.761360] kjournald starting.  Commit interval 5 seconds

[    1.767854] EXT3-fs (mmcblk0p2): using internal journal

[    1.773373] EXT3-fs (mmcblk0p2): mounted filesystem with ordered data mode

[    1.780648] VFS: Mounted root (ext3 filesystem) on device 179:2.

[    1.787817] devtmpfs: mounted

[    1.791399] Freeing unused kernel memory: 344K (c0739000 - c078f000)

INIT: version 2.88 booting

Starting S01AllRunLevels

rm: can't remove '/etc/bind/zone.local.com': No such file or directory

Starting udev

[    2.193827] udevd[856]: starting version 182

[    2.536445] PM: CM3 Firmware Version = 0x186

[    3.628927] davinci_cpld sound.6:  gcpld-audio <-> 4803c000.mcasp mapping ok

[    3.645730] davinci_audtel sound.8:  gaudtel-audio <-> 48038000.mcasp mapping ok

[    3.732237] net eth1: initializing cpsw version 1.12 (0)

[    3.740316] net eth1: phy found : id is : 0x20005ce1

[    3.788551] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready

[    3.794836] net eth0: initializing cpsw version 1.12 (0)

[    3.802831] net eth0: phy found : id is : 0x20005ce1

[    4.085968] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready

[    5.739299] EXT4-fs (mmcblk0p4): mounted filesystem with ordered data mode. Opts: (null)

[    5.852834] EXT4-fs (mmcblk0p3): mounted filesystem with ordered data mode. Opts: (null)

[    5.875301] FAT-fs (mmcblk0p1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.

[    6.196840] musb-hdrc musb-hdrc.0.auto: Enabled SW babble control

[    6.290503] musb-hdrc musb-hdrc.0.auto: MUSB HDRC host driver

[    6.368213] musb-hdrc musb-hdrc.0.auto: new USB bus registered, assigned bus number 1

[    6.459045] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002

[    6.466201] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1

[    6.473803] usb usb1: Product: MUSB HDRC host driver

[    6.479020] usb usb1: Manufacturer: Linux 3.12.10-Edwards.00.00.17-ti2013.12.01 musb-hcd

[    6.487501] usb usb1: SerialNumber: musb-hdrc.0.auto

[    6.739737] hub 1-0:1.0: USB hub found

[    6.754315] hub 1-0:1.0: 1 port detected

[    6.765534] musb-hdrc musb-hdrc.1.auto: Enabled SW babble control

[    6.781217] musb-hdrc musb-hdrc.1.auto: MUSB HDRC host driver

[    6.796468] musb-hdrc musb-hdrc.1.auto: new USB bus registered, assigned bus number 2

[    6.826562] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002

[    6.833772] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1

[    6.841361] usb usb2: Product: MUSB HDRC host driver

[    6.846563] usb usb2: Manufacturer: Linux 3.12.10-Edwards.00.00.17-ti2013.12.01 musb-hcd

[    6.855056] usb usb2: SerialNumber: musb-hdrc.1.auto

[    6.861756] hub 2-0:1.0: USB hub found

[    6.865729] hub 2-0:1.0: 1 port detected

Configuring network interfaces... ifup: interface lo already configured

ifup: interface eth0 already configured

ifup: interface eth1 already configured

ifconfig: SIOCGIFFLAGS: No such device

ifconfig: SIOCGIFFLAGS: No such device

ifconfig: SIOCGIFFLAGS: No such device

Configuration file: /etc/hostapd/hostapd.conf

[    7.612533] cfg80211: Calling CRDA to update world regulatory domain

Could not read interface wlan0 flags: No such device

nl80211: Driver does not support authentication/association or connect commands

nl80211: deinit ifname=wlan0 disabled_11b_rates=0

Could not read interface wlan0 flags: No such device

nl80211 driver initialization failed.

wlan0: interface state UNINITIALIZED->DISABLED

wlan0: AP-DISABLED

hostapd_free_hapd_data: Interface wlan0 wasn't started

done.

[    7.750700] using random self ethernet address

[    7.755384] using random host ethernet address

[    7.763665] usb0: HOST MAC fa:02:0c:ba:8d:06

[    7.778639] usb0: MAC d2:c1:37:06:f1:61

[    7.782768] using random self ethernet address

[    7.787428] using random host ethernet address

[    7.804235] g_ether gadget: Ethernet Gadget, version: Memorial Day 2008

[    7.811265] g_ether gadget: g_ether ready

net.ipv4.ip_forward = 1

[    7.887989] IPv6: ADDRCONF(NETDEV_UP): usb0: link is not ready

Peter M said:

And that this function is returning OMAPDSS_VER_UNKNOWN

static enum omapdss_version __init omap_display_get_version(void)
{

FYI, I see this same message even in the TI binaries from SDK 7.00.  It looks like this function above is called from within omap_display_init.  I couldn't see from code inspection who might be calling omap_display_init though.  Could you output the call stack from within that function so we can get a better idea of how you end up there?  Directions on how to do that are given here:

http://processors.wiki.ti.com/index.php/Enabling_Stack_Dumping_in_Linux_Kernel

Brad,

Here is the stack trace.

.099196] [<c0017c44>] (dump_backtrace+0x0/0x10c) from [<c0018028>] (show_stack+0x18/0x1c)

[    0.099203]  r6:c085ffc0 r5:00000003 r4:c07e54b0 r3:00000000

[    0.099235] [<c0018010>] (show_stack+0x0/0x1c) from [<c0594c00>] (dump_stack+0x20/0x28)

[    0.099254] [<c0594be0>] (dump_stack+0x0/0x28) from [<c0796c98>] (omap_display_get_version+0x10/0x230)

[    0.099266] [<c0796c88>] (omap_display_get_version+0x0/0x230) from [<c079719c>] (omapdss_init_of+0x10/0xdc)

[    0.099272]  r4:c07e54b0 r3:60000113

[    0.099291] [<c079718c>] (omapdss_init_of+0x0/0xdc) from [<c079cd54>] (omap_generic_init+0x30/0x38)

[    0.099296]  r4:c07e54b0 r3:60000113

[    0.099315] [<c079cd24>] (omap_generic_init+0x0/0x38) from [<c078e2fc>] (customize_machine+0x24/0x48)

[    0.099329] [<c078e2d8>] (customize_machine+0x0/0x48) from [<c0008a3c>] (do_one_initcall+0xf4/0x154)

[    0.099342] [<c0008948>] (do_one_initcall+0x0/0x154) from [<c078cb40>] (kernel_init_freeable+0xf0/0x1bc)

[    0.099356] [<c078ca50>] (kernel_init_freeable+0x0/0x1bc) from [<c0590044>] (kernel_init+0x10/0xec)

[    0.099378] [<c0590034>] (kernel_init+0x0/0xec) from [<c0014718>] (ret_from_fork+0x14/0x3c)

[    0.099384]  r4:00000000 r3:00000000

It appears that it is being called in arch\arm\mach-opmap2\board-generic.c, There is a vector table for the am33xx (which we are compatible with). It calls omapdss_init_of(); which then calls the function to get the omap_display_get_version version.

#ifdef CONFIG_SOC_AM33XX

static const char *am33xx_boards_compat[] __initdata = {

     "ti,am33xx",

     NULL,

};

DT_MACHINE_START(AM33XX_DT, "Generic AM33XX (Flattened Device Tree)")

     .reserve    = am33xx_reserve,

     .map_io           = am33xx_map_io,

     .init_early = am33xx_init_early,

     .init_late  = am33xx_init_late,

     .init_irq   = omap_intc_of_init,

     .handle_irq = omap3_intc_handle_irq,

     .init_machine     = omap_generic_init,

     .init_late  = am33xx_init_late,

     .init_time  = omap3_gptimer_timer_init,

     .dt_compat  = am33xx_boards_compat,

     .restart    = am33xx_restart,

MACHINE_END

#endif