So currently working with this little LCD display I got
and when I tried it with my Pi at first it didn’t work until I followed the directions on and set the /boot/config.txt to
hdmi_group=2
hdmi_mode=87
hdmi_cvt 480 800 60 6 0 0 0
I am looking how to run a CVT display on the dragonboard, I “tried” using fbset and cvt but both seem to show no effect. I am asking for advise where to look next and if this is something possible without having to rebuild the kernel.
note: running latest version of debian
Also here is the boot error I think is preventing it
[ 9.792392] iommu: Adding device 1d00000.video-codec to group 0
[ OK ] Reached target System Initialization.[ 9.805012] qcom-venus 1d00000.video-codec: Direct firmware load for qcom/venus-1.8/venus.mdt failed with error -2
[ 9.823286] ------------[ cut here ]------------
[ 9.827307] WARNING: CPU: 0 PID: 1557 at …/arch/arm64/mm/dma-mapping.c:843 arch_teardown_dma_ops+0x28/0x48
[ 9.835266] Modules linked in: qcom_camss(+) videobuf2_dma_sg venus_core(+) videobuf2_memops mdt_loader v4l2_mem2mem videobuf2_v4l2 videobuf2_core msm_rng rng_core videodev media ip_tables x_tables i2c_qcom_cci
[ 9.864876]
[ 9.868837] CPU: 0 PID: 1557 Comm: systemd-udevd Not tainted 4.9.56-linaro-lt-qcom #1
[ 9.876797] Hardware name: Qualcomm Technologies, Inc. APQ 8016 SBC (DT)
[ 9.884737] task: ffff800035b3e800 task.stack: ffff8000352c4000
[ 9.892676] PC is at arch_teardown_dma_ops+0x28/0x48
[ 9.896682] LR is at arch_teardown_dma_ops+0x14/0x48
[ 9.900613] pc : [] lr : [] pstate: 20000145
[ 9.909433] sp : ffff8000352c7ad0
[ 9.913367] x29: ffff8000352c7ad0 x28: 00000000024000c0
[ 9.921308] x27: 0000000000000124 x26: ffff8000363add88
[ 9.929226] x25: 0000000000000001 x24: ffff8000363ce000
[ 9.937082] x23: 0000000000000034 x22: 00000000fffffffe
[ 9.944890] x21: ffff000000b40028 x20: ffff000009111000
[ 9.952660] x19: ffff8000367bf810 x18: 0000000000000010
[ 9.960417] x17: 0000ffff8ed94c10 x16: 0000aaaad777bbc8
[ 9.968197] x15: 0000000000000006 x14: 000000000000000a
[ 9.975946] x13: ffff000008e0f000 x12: dead000000000100
[ 9.983646] x11: ffff7e0000000000 x10: ffff800035baf400
[ 9.991296] x9 : 0000000000000000 x8 : ffff800037f2fae0
[ 9.998896] x7 : ffff800037f2fb08 x6 : 0000000000895440
[ 10.006460] x5 : ffff800035b3e800 x4 : ffff800035b3e880
[ 10.013991] x3 : 0000000000000002 x2 : ffff8000363ce538
[ 10.021480] x1 : 0000000000000000 x0 : ffff8000363ce5a8
[ 10.028903]
[ 10.032256] —[ end trace 0a47445580c59805 ]—
[ 10.035648] Call trace:
[ 10.039232] Exception stack(0xffff8000352c7900 to 0xffff8000352c7a30)
[ 10.045876] 7900: ffff8000367bf810 0001000000000000 ffff8000352c7ad0 ffff000008096810
[ 10.052552] 7920: ffff8000352c7940 ffff0000080e2364 ffff800009f7a700 ffff800037f2fa80
[ 10.059345] 7940: ffff8000352c7970 ffff0000080e3dc4 ffff800009f7a700 0000000000000000
[ 10.067204] 7960: ffff800009f7ae34 00000000000001c0 ffff8000352c79d0 ffff0000080e3f3c
[ 10.075068] 7980: 0000000000000039 ffff800036578200 ffff000008f57a78 ffff0000090e2748
[ 10.082883] 79a0: ffff8000363ce5a8 0000000000000000 ffff8000363ce538 0000000000000002
[ 10.090715] 79c0: ffff800035b3e880 ffff800035b3e800 0000000000895440 ffff800037f2fb08
[ 10.098528] 79e0: ffff800037f2fae0 0000000000000000 ffff800035baf400 ffff7e0000000000
[ 10.106329] 7a00: dead000000000100 ffff000008e0f000 000000000000000a 0000000000000006
[ 10.114168] 7a20: 0000aaaad777bbc8 0000ffff8ed94c10
[ 10.118616] [] arch_teardown_dma_ops+0x28/0x48
[ 10.126656] [] of_dma_deconfigure+0xc/0x18
[ 10.133476] [] dma_deconfigure+0xc/0x18
[ 10.136944] [] driver_probe_device+0x36c/0x440
[ 10.144656] [] __driver_attach+0x114/0x118
[ 10.151585] [] bus_for_each_dev+0x64/0xa0
[ 10.158623] [] driver_attach+0x20/0x28
[ 10.162250] [] bus_add_driver+0x1e8/0x2a0
[ 10.170211] [] driver_register+0x60/0xf8
[ 10.177626] [] __platform_driver_register+0x40/0x48
[ 10.185228] [] qcom_venus_driver_init+0x14/0x1000 [venus_core]
[ 10.193026] [] do_one_initcall+0x38/0x128
[ 10.200993] [] do_init_module+0x5c/0x1b8
[ 10.209118] [] load_module+0x1c60/0x2338
[ 10.217437] [] SyS_finit_module+0x100/0x110
[ 10.225859] [] __sys_trace_return+0x0/0x4