397400613 发表于 2017-11-6 17:32:42

lcd-LG079qx1.dtsi里更改参数无效

[    0.624090] graphics fb0: rockchip framebuffer registerd:fb0
lcd-LG079qx1.dtsi里更改了频率参数为138700000
disp_timings: display-timings {
                native-mode = <&timing0>;
                timing0: timing0 {
                                screen-type = <SCREEN_EDP>;
                                out-face    = <OUT_P888>;
                              clock-frequency = <138700000>;

                                hactive = <1920>;
但是log里还是205000000
[    0.624419] graphics fb1: rockchip framebuffer registerd:fb1
[    0.624594] graphics fb2: rockchip framebuffer registerd:fb2
[    0.624778] graphics fb3: rockchip framebuffer registerd:fb3
[    0.625017] rk3288-lcdc lcdc0: lcdc0: dclk:205000000>>fps:61
[    0.625040] rk3288-lcdc lcdc0: wakeup from standby!
[    0.656453] alloc_buffer:ion_phy_addr=0x55c00000
[    0.671623] fb0:phy:55c00000>>vir:e0971000>>len:0x1900000
[    0.744715] rk3288-lcdc lcdc0: lcdc0 probe ok, iommu disabled
[    0.744939] rk3288-lcdc lcdc1: can't find power_ctr node for lcdc1
[    0.744962] rk_fb_trsm_ops_get:un supported transmitter:0!
[    0.745223] graphics fb4: rockchip framebuffer registerd:fb4
[    0.745563] graphics fb5: rockchip framebuffer registerd:fb5
[    0.745753] graphics fb6: rockchip framebuffer registerd:fb6
[    0.745938] graphics fb7: rockchip framebuffer registerd:fb7
[    0.746200] unknow screen type: 0
[    0.746276] rk3288-lcdc lcdc1: lcdc1: dclk:205000000>>fps:1991
[    0.746300] rk3288-lcdc lcdc1: wakeup from standby!
[    0.746320] fb4:phy:55c00000>>vir:e0971000>>len:0x1900000
[    0.746341] rk3288-lcdc lcdc1: lcdc1 probe ok, iommu disabled

loading 发表于 2017-11-7 10:51:45

确认一下，你编译的dts 是否include 的这个lcd-LG079qx1.dtsi

HelloBirthday 发表于 2017-11-8 09:20:44

我也是同样的问题，screen已经获取到正确的timing，只亮背光。打开uboot-logo-on时uboot的开机画面可以显示，但是到内核阶段就显示不正常了。关闭后，只亮背光

397400613 发表于 2017-11-13 17:06:39

之前频率修改不了的问题找到了，是因为打包boot的时候没有把resource.img打包进去，而dts编译后生成的dtb文件是在resource.img中的。
但是现在又有了新问题，调试自己的17.3寸edp屏只能亮背光，log没有看到什么异常，firefly的7.85寸屏跑ubuntu系统目前只能竖屏显示，试着更改了lcd-LP079qx1.dtsi里的hactive与vactive交换一下，就不能显示了
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