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器件型号：TDA4VH-Q1 主题中讨论的其他器件：SN65DSI86、 PCM3168A、 TDA4VL
工具与软件：
SDK：ti-processor-sdk-linux-adas-j784s4-evm-10_00_00_08
在我的 uEnv.txt 中、我删除最后一行(#name_overles=ti/k3-j784s4-evm-ethfw.dtbo ti/k3-j784s4-vision-apps.dtbo)
我交叉编译了 恒温器演示、并将其放置到 j784s4_evm、当我们使用 DP0到 DP0电缆时、 我们能够获得显示、但当我们使用有源 DP 到 HDMI 转换器时、它无法正常工作。
当我插入 DP 转 HDMI 适配器时、内核显示：
root@j784s4-evm:~# [ 64.367398] cdns-mhdp8546 a000000.bridge: Failed to read receiver capabilities [ 64.406376] cdns-mhdp8546 a000000.bridge: get block[0] edid failed: -22 [ 64.880566] cdns-mhdp8546 a000000.bridge: Failed to read receiver capabilities [ 64.880617] Console: switching to colour frame buffer device 80x30 [ 64.880752] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000170 [ 64.880755] Mem abort info: [ 64.880757] ESR = 0x0000000096000006 [ 64.880759] EC = 0x25: DABT (current EL), IL = 32 bits [ 64.880762] SET = 0, FnV = 0 [ 64.880764] EA = 0, S1PTW = 0 [ 64.880766] FSC = 0x06: level 2 translation fault [ 64.880769] Data abort info: [ 64.880770] ISV = 0, ISS = 0x00000006, ISS2 = 0x00000000 [ 64.880772] CM = 0, WnR = 0, TnD = 0, TagAccess = 0 [ 64.880774] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [ 64.880777] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000892f34000 [ 64.880781] [0000000000000170] pgd=0800000892d67003, p4d=0800000892d67003, pud=0800000892d62003, pmd=0000000000000000 [ 64.880790] Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP [ 64.880794] Modules linked in: overlay bluetooth cfg80211 ecdh_generic ecc rfkill rpmsg_ctrl rpmsg_char panel_edp ti_am335x_adc cdns3 kfifo_buf cdns_usb_common cdns_pltfrm wave5 videobuf2_dma_contig videobuf2_memops v4l2_mem2mem crct10dif_ce snd_soc_j721e_evm videobuf2_v4l2 mux_gpio display_connector videobuf2_common videodev phy_can_transceiver ti_k3_r5_remoteproc mc m_can_platform at24 cdns_dsi cdns_mhdp8546 ti_sn65dsi86 ti_am335x_tscadc m_can tidss ti_k3_dsp_remoteproc snd_soc_davinci_mcasp cdns_dphy pvrsrvkm(O) k3_j72xx_bandgap drm_display_helper can_dev sa2ul ti_j721e_ufs snd_soc_ti_udma drm_dma_helper cdns3_ti snd_soc_ti_edma drm_dp_aux_bus authenc snd_soc_ti_sdma drm_kms_helper snd_soc_pcm3168a_i2c snd_soc_pcm3168a rti_wdt cryptodev(O) fuse drm drm_panel_orientation_quirks backlight ipv6 [ 64.880916] CPU: 0 PID: 9 Comm: kworker/0:1 Tainted: G O 6.6.32-ti-gdb8871293143-dirty #1 [ 64.880921] Hardware name: Texas Instruments J784S4 EVM (DT) [ 64.880924] Workqueue: events cdns_mhdp_modeset_retry_fn [cdns_mhdp8546] [ 64.880947] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 64.880952] pc : mutex_lock+0x20/0x54 [ 64.880968] lr : cdns_mhdp_modeset_retry_fn+0x24/0x54 [cdns_mhdp8546] [ 64.880976] sp : ffff800081493da0 [ 64.880977] x29: ffff800081493da0 x28: 0000000000000000 x27: 0000000000000000 [ 64.880983] x26: ffff000f0bf0cb28 x25: ffff000800047700 x24: ffff000800010005 [ 64.880989] x23: ffff00080e46dcb0 x22: ffff000f0bf0cb00 x21: ffff000800010000 [ 64.880994] x20: ffff00080e46d0f8 x19: ffff00080e46d080 x18: ffff00080e410280 [ 64.881000] x17: 004800000000020d x16: 01ec01ea020d01e0 x15: ffff8000795a6000 [ 64.881005] x14: 0000000000000000 x13: 00000000000001a5 x12: 0000000000000002 [ 64.881010] x11: 0000000000000000 x10: 00000000000009b0 x9 : ffff800081493d20 [ 64.881015] x8 : ffff000800168a10 x7 : ffff000800047740 x6 : 0000000000000018 [ 64.881020] x5 : 000073746e657665 x4 : 0000000000000000 x3 : 0000000000000000 [ 64.881025] x2 : ffff000800168000 x1 : ffff8000797eb124 x0 : 0000000000000170 [ 64.881031] Call trace: [ 64.881033] mutex_lock+0x20/0x54 [ 64.881038] process_one_work+0x138/0x248 [ 64.881047] worker_thread+0x320/0x438 [ 64.881052] kthread+0x110/0x114 [ 64.881056] ret_from_fork+0x10/0x20 [ 64.881063] Code: b5000141 d65f03c0 d2800003 f9800011 (c85ffc01) [ 64.881067] ---[ end trace 0000000000000000 ]--- [ 65.186223] tidss 4a00000.dss: [drm] fb0: tidssdrmfb frame buffer device
