hi balbes150 I'm seeing errors while playing 4K content as well as some 1080p content.
I'm running the build on RK3399 based X99 TV box
[ 199.702783] ------------[ cut here ]------------
[ 199.702813] WARNING: CPU: 2 PID: 1001 at drivers/gpu/drm/drm_gem.c:1096 drm_gem_mmap_obj+0x1a8/0x208
[ 199.703499] Modules linked in: 8021q garp mrp stp llc rockchip_rga rockchip_vdec(C) hantro_vpu(C) videobuf2_vmalloc videobuf2_dma_sg videobuf2_dma_contig videobuf2_memops v4l2_h264 v4l2_mem2mem bnep brcmfmac videobuf2_v4l2 videobuf2_common fusb302 tcpm brcmutil typec videodev snd_usb_audio cfg80211 snd_usbmidi_lib panfrost snd_soc_simple_card joydev hci_uart btqca btrtl btbcm gpu_sched btintel crct10dif_ce btsdio snd_soc_simple_card_utils bluetooth snd_hwdep ecdh_generic ecc gpio_ir_recv mc rfkill ipv6
[ 199.703688] CPU: 2 PID: 1001 Comm: kodi.bin Tainted: G WC 5.10.0-rc5 #1
[ 199.703692] Hardware name: Hugsun X99 TV BOX (DT)
[ 199.703700] pstate: 00000005 (nzcv daif -PAN -UAO -TCO BTYPE=--)
[ 199.704397] pc : drm_gem_mmap_obj+0x1a8/0x208
[ 199.704404] lr : drm_gem_mmap_obj+0x7c/0x208
[ 199.704408] sp : ffff8000145f3c00
[ 199.704415] x29: ffff8000145f3c00 x28: 0000000000000008
[ 199.704426] x27: ffff000040348d80 x26: ffff000047368000
[ 199.705705] x25: 0000000000000258 x24: ffff0000466fa400
[ 199.705714] x23: ffff00004731e800 x22: ffff000049a58000
[ 199.705721] x21: ffff000040348d80 x20: 0000000000000000
[ 199.705729] x19: ffff00006572e000 x18: 0000000000000000
[ 199.705736] x17: 0000000000000000 x16: 0000000000000000
[ 199.705743] x15: 0000000000000000 x14: 0000000000000000
[ 199.705751] x13: 0000000000000000 x12: 0000000000000000
[ 199.705758] x11: 0000000000100000 x10: ffff000047368028
[ 199.705766] x9 : 0000000000000001 x8 : 00000000000000c8
[ 199.706316] x7 : 0000000000000020 x6 : 0000000000008bf4
[ 199.706323] x5 : ffff00006572e020 x4 : 0000000000000000
[ 199.706330] x3 : ffff0000473c6d38 x2 : 0000000000000064
[ 199.706337] x1 : 0000000000000000 x0 : 00000000000000fb
[ 199.706345] Call trace:
[ 199.706356] drm_gem_mmap_obj+0x1a8/0x208
[ 199.706361] drm_gem_mmap+0x164/0x2a0
[ 199.707492] mmap_region+0x3d8/0x6a0
[ 199.707498] do_mmap+0x34c/0x588
[ 199.707504] vm_mmap_pgoff+0x90/0xf0
[ 199.707986] ksys_mmap_pgoff+0x1b8/0x1e8
[ 199.707994] __arm64_compat_sys_aarch32_mmap2+0x20/0x30
[ 199.708000] el0_svc_common.constprop.0+0x80/0x220
[ 199.708916] do_el0_svc_compat+0x1c/0x48
[ 199.708922] el0_sync_compat_handler+0x140/0x28c
[ 199.708927] el0_sync_compat+0x178/0x180
[ 199.708933] ---[ end trace 328f70cbfe9d8601 ]---