Hi Jagan, On 22.11.2021 15:21, Jagan Teki wrote: > On Mon, Nov 22, 2021 at 7:45 PM Marek Szyprowski > <m.szyprowski@xxxxxxxxxxx> wrote: >> On 22.11.2021 08:06, Jagan Teki wrote: >>> Some display panels would come up with a non-DSI output, those >>> can have an option to connect the DSI host by means of interface >>> bridge converter. >>> >>> This DSI to non-DSI interface bridge converter would requires >>> DSI Host to handle drm bridge functionalities in order to DSI >>> Host to Interface bridge. >>> >>> This patch convert the existing to a drm bridge driver with a >>> built-in encoder support for compatibility with existing >>> component drivers. >>> >>> Signed-off-by: Jagan Teki <jagan@xxxxxxxxxxxxxxxxxxxx> >>> --- >>> Note: >>> Hi Marek Szyprowski, >>> >>> Please test this on Panel and Bridge hardware. >> I don't have good news, t crashes: >> >> [drm] Exynos DRM: using 13800000.decon device for DMA mapping operations >> exynos-drm exynos-drm: bound 13800000.decon (ops decon_component_ops) >> exynos-drm exynos-drm: bound 13880000.decon (ops decon_component_ops) >> exynos-drm exynos-drm: bound 13930000.mic (ops exynos_mic_component_ops) >> [drm:drm_bridge_attach] *ERROR* failed to attach bridge >> /soc@0/dsi@13900000 to encoder TMDS-67: -22 >> exynos-drm exynos-drm: failed to bind 13900000.dsi (ops >> exynos_dsi_component_ops): -22 >> Internal error: synchronous external abort: 96000210 [#1] PREEMPT SMP >> Modules linked in: >> CPU: 2 PID: 74 Comm: kworker/u16:1 Not tainted 5.16.0-rc1+ #4141 >> Hardware name: Samsung TM2E board (DT) >> Workqueue: events_unbound deferred_probe_work_func >> pstate: 80000005 (Nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) >> pc : decon_atomic_disable+0x58/0xd4 >> lr : decon_atomic_disable+0x28/0xd4 >> sp : ffff80001390b940 >> x29: ffff80001390b940 x28: ffff80001259a000 x27: ffff000027f39e80 >> input: stmfts as >> /devices/platform/soc@0/14ed0000.hsi2c/i2c-3/3-0049/input/input0 >> x26: 00000000ffffffea x25: ffff000025a40280 x24: 0000000000000001 >> x23: ffff800011b55f98 x22: ffff0000315dc000 x21: ffff00002695d100 >> x20: ffff000027e7a080 x19: ffff0000315e6000 x18: 0000000000000000 >> x17: 645f736f6e797865 x16: 2073706f28206973 x15: 0000000000028ee0 >> x14: 0000000000000028 x13: 0000000000000001 x12: 0000000000000040 >> x11: ffff000023c18920 x10: ffff000023c18922 x9 : ffff8000126352f0 >> x8 : ffff000023c00270 x7 : 0000000000000000 x6 : ffff000023c00268 >> x5 : ffff000027e7a3a0 x4 : 0000000000000001 x3 : ffff000027e7a080 >> x2 : 0000000000000024 x1 : ffff800013bc8024 x0 : ffff0000246117c0 >> Call trace: >> decon_atomic_disable+0x58/0xd4 >> decon_unbind+0x1c/0x3c >> component_unbind+0x38/0x60 >> component_bind_all+0x16c/0x25c >> exynos_drm_bind+0x104/0x1bc >> try_to_bring_up_master+0x164/0x1d0 >> __component_add+0xa8/0x174 >> component_add+0x14/0x20 >> hdmi_probe+0x438/0x710 >> platform_probe+0x68/0xe0 >> really_probe.part.0+0x9c/0x31c >> __driver_probe_device+0x98/0x144 >> driver_probe_device+0xc8/0x160 >> __device_attach_driver+0xb8/0x120 >> bus_for_each_drv+0x78/0xd0 >> __device_attach+0xd8/0x180 >> device_initial_probe+0x14/0x20 >> bus_probe_device+0x9c/0xa4 >> deferred_probe_work_func+0x88/0xc4 >> process_one_work+0x288/0x6f0 >> worker_thread+0x74/0x470 >> kthread+0x188/0x194 >> ret_from_fork+0x10/0x20 >> Code: 11002042 f9481c61 531e7442 8b020021 (88dffc21) >> ---[ end trace d73aff585b108954 ]--- >> Kernel panic - not syncing: synchronous external abort: Fatal exception >> SMP: stopping secondary CPUs >> Kernel Offset: disabled >> CPU features: 0x2,300071c2,00000846 >> Memory Limit: none >> ---[ end Kernel panic - not syncing: synchronous external abort: Fatal >> exception ]--- > Is this with Bridge or normal DSI panel? This log is from the TM2e board (arch/arm64/boot/dts/exynos/exynos5433-tm2e.dts) with a normal DSI panel and Exynos MIC bridge between Exynos Decon and Exynos DSI. Best regards -- Marek Szyprowski, PhD Samsung R&D Institute Poland
