主题中讨论的其他器件：SN65DSI86
你好。 我有一个搭载 NXP i.MX 8M Plus 处理器的电路板和一个双通道 MIPI DSI 连接器、我正在尝试使用 DSI86 EVM。 我可以通过0x2D 地址上的 i2c 检测电桥、还可以使用 i2cset 设置寄存器以便在显示屏上显示色条。 但是桥的驱动器似乎无法识别桥并执行一些操作。
我将显示屏的面板描述添加到了 panel-pdp.c 驱动程序中、并编写了以下 DTS 覆盖层：
&{/} {
sn65dsi86_refclk: sn65dsi86-refclk {
compatible = "fixed-clock";
#clock-cells = <0>;
clock-frequency = <27000000>;
status = "okay";
};
panel: edp-panel {
compatible = "hp,e24-g4";
status = "okay";
dsi-lanes = <2>;
video-mode = <0>;
port {
panel_from_sn65: endpoint {
remote-endpoint = <&sn65_to_panel>;
};
};
};
};
&i2c2 {
status = "okay";
sn65dsi86@2d {
compatible = "ti,sn65dsi86";
status = "okay";
reg = <0x2d>;
ti,dsi-lanes = <2>;
max,dsi-channel = <1>;
ti,dp-lanes = <2>;
dsi-clocks;
clocks = <&sn65dsi86_refclk>;
clock-names = "refclk";
ports {
//IN(DSI===>SN65DSI)
port@0 {
reg = <0>;
sn65_in: endpoint {
remote-endpoint = <&dsim_to_sn65>;
};
};
//out
port@1 {
reg = <1>;
sn65_to_panel: endpoint {
data-lanes = <0 1 2 3>;
lane-polarities = <0 1 0 1>;
remote-endpoint = <&panel_from_sn65>;
};
};
};
};
};
&lcdif1 {
status = "okay";
};
&mipi_dsi {
status = "okay";
port@1 {
reg = <1>;
dsim_to_sn65: endpoint {
remote-endpoint = <&sn65_in>;
attach-bridge;
};
};
};
大多数情况下、当插入 ti-sn65dsi86.ko 内核模块时(或在引导板后)、我只收到以下消息：
[ 544.693812] ti_sn65dsi86 1-002d: GPIO lookup for consumer enable [ 544.693829] ti_sn65dsi86 1-002d: using device tree for GPIO lookup [ 544.693841] of_get_named_gpiod_flags: can't parse 'enable-gpios' property of node '/soc@0/bus@30800000/i2c@30a30000/sn65dsi86@2d[0]' [ 544.693871] of_get_named_gpiod_flags: can't parse 'enable-gpio' property of node '/soc@0/bus@30800000/i2c@30a30000/sn65dsi86@2d[0]' [ 544.693897] ti_sn65dsi86 1-002d: using lookup tables for GPIO lookup [ 544.693902] ti_sn65dsi86 1-002d: No GPIO consumer enable found [ 544.693909] ti_sn65dsi86 1-002d: Looking up vcca-supply from device tree [ 544.693924] ti_sn65dsi86 1-002d: Looking up vcca-supply property in node /soc@0/bus@30800000/i2c@30a30000/sn65dsi86@2d failed [ 544.693956] ti_sn65dsi86 1-002d: supply vcca not found, using dummy regulator [ 544.694091] ti_sn65dsi86 1-002d: Looking up vcc-supply from device tree [ 544.694105] ti_sn65dsi86 1-002d: Looking up vcc-supply property in node /soc@0/bus@30800000/i2c@30a30000/sn65dsi86@2d failed [ 544.694131] ti_sn65dsi86 1-002d: supply vcc not found, using dummy regulator [ 544.694179] ti_sn65dsi86 1-002d: Looking up vccio-supply from device tree [ 544.694191] ti_sn65dsi86 1-002d: Looking up vccio-supply property in node /soc@0/bus@30800000/i2c@30a30000/sn65dsi86@2d failed [ 544.694215] ti_sn65dsi86 1-002d: supply vccio not found, using dummy regulator [ 544.694263] ti_sn65dsi86 1-002d: Looking up vpll-supply from device tree [ 544.694275] ti_sn65dsi86 1-002d: Looking up vpll-supply property in node /soc@0/bus@30800000/i2c@30a30000/sn65dsi86@2d failed [ 544.694299] ti_sn65dsi86 1-002d: supply vpll not found, using dummy regulator [ 544.700845] imx-drm display-subsystem: bound imx-lcdifv3-crtc.0 (ops lcdifv3_crtc_ops) [ 544.700978] imx_sec_dsim_drv 32e60000.mipi_dsi: version number is 0x1060200 [ 544.701032] imx_sec_dsim_drv 32e60000.mipi_dsi: [drm] *ERROR* modalias failure on /soc@0/bus@32c00000/mipi_dsi@32e60000/port@1 [ 544.712687] [drm:drm_bridge_attach] *ERROR* failed to attach bridge /soc@0/bus@32c00000/mipi_dsi@32e60000 to encoder DSI-34: -517 [ 544.724454] imx_sec_dsim_drv 32e60000.mipi_dsi: Failed to attach bridge: 32e60000.mipi_dsi [ 544.732748] imx_sec_dsim_drv 32e60000.mipi_dsi: failed to bind sec dsim bridge: -517
有时(比如30次中的一次)我得到了这个。 即使在电桥根本没有连接的情况下、这种情况也是非常随机的、因此我想知道它来自哪里以及为什么：
[ 710.460491] imx-drm display-subsystem: bound imx-lcdifv3-crtc.0 (ops lcdifv3_crtc_ops) [ 710.460639] imx_sec_dsim_drv 32e60000.mipi_dsi: version number is 0x1060200 [ 710.460677] imx_sec_dsim_drv 32e60000.mipi_dsi: [drm] *ERROR* modalias failure on /soc@0/bus@32c00000/mipi_dsi@32e60000/port@1 [ 710.472928] imx-drm display-subsystem: bound 32e60000.mipi_dsi (ops imx_sec_dsim_ops) [ 710.473235] [drm] Initialized imx-drm 1.0.0 20120507 for display-subsystem on minor 1 [ 710.473399] cma: cma_alloc(cma 0000000077aa1180, count 2025, align 8) [ 710.475231] cma: cma_alloc(): returned 00000000c106d400 [ 710.477453] imx_sec_dsim_drv 32e60000.mipi_dsi: failed to get pmsk for: fin = 12000, fout = 0 [ 710.477486] Console: switching to colour frame buffer device 240x67 [ 710.477582] imx_sec_dsim_drv 32e60000.mipi_dsi: failed to get pmsk for: fin = 12000, fout = 0 [ 710.506418] imx-drm display-subsystem: [drm] fb0: imx-drmdrmfb frame buffer device [ 710.828014] imx_sec_dsim_drv 32e60000.mipi_dsi: failed to get pmsk for: fin = 12000, fout = 0 [ 711.263914] vgaarb: vga_arb_open [ 711.739995] imx_sec_dsim_drv 32e60000.mipi_dsi: failed to get pmsk for: fin = 12000, fout = 0 [ 711.748773] imx_sec_dsim_drv 32e60000.mipi_dsi: failed to get pmsk for: fin = 12000, fout = 0 [ 716.921122] imx_sec_dsim_drv 32e60000.mipi_dsi: failed to get pmsk for: fin = 12000, fout = 0
一旦我设法得到了错误、这意味着驱动器实际上与桥进行了通信：
[2.170625] IMX-DRM 显示子系统：Bound 32e6000.mipi_DSI (ops imx_sec_dsim_ops)
[ 2.840998] ti_sn65dsi86 1-002D：[drm：ti_sn_bridge_atomic_enable [ti_sn65dsi86]]*错误*链接训练失败，链接关闭(-5)
[ 13.824711] ti_sn65dsi86 1-002D：[drm：ti_sn_bridge_atomic_enable [ti_sn65dsi86]]*错误*链接训练失败，链接关闭(-5)
在该错误消息之后、我还检查了寄存器：
~# i2cdump -y 1 0x2D
未指定大小(使用字节数据访问)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 36 38 49 53 44 20 20 20 02 00 06 00 00 00 68ISD ?...
10：26 00 33 85 00 00 00 00 00 00 00 00 00 00 00 00 & 0.3？..........
20：80 07 00 38 04 00 00 00 00 00 00 00 00 2c 00 00 00 ？...8？…… 、...
30: 05 00 00 00 00 94 00 24 00 58 00 04 00 10 00 00 00 ？………………………………………………………………………………………………………
40：01 00 00 00 80 00 98 08 65 04 C0 00 29 00 2c 00 ？...？？？？e...)...
50：05 00 80 07 38 04 20 00 40 E4 00 A4 00 11 00 b0 00 ？？？？8？ @………………………………………………
60：A0 60 A4 00 06 00 06 00 00 00 00 00 00 00 00 00 `………………………………………………………
70：00 00 00 00 00 01 02 01 80 17 00 00 00 00 00 00 。 ？？？？？ ......
80：00 00 00 00 00 00 00 00 00 1f 7c f0 c1 07 1f 7c 。 ？|？？？？|
90：F0 C1 07 20 82 00 04 01 00 00 00 00 00 00 00 00 ？？？ …………………………………
A0：01 ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ？..........
b0：04 78 AC 08 6c 9c 0c 5c 5c 5c 5c 0c 0c 0c 0c 0c ？x？l？？？？？
C0：3F 3f 0f 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ？............
D0：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ．
E0：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ．
F0：02 03 00 01 20 00 00 13 00 00 00 00 00 00 00 ？... ………………………
不幸的是、即使我没有更改任何内容、也无法获得再次显示的相同错误消息
您有什么建议吗？
