Failed to customize the resolution of the xrande command

ArmSoM-w3 [RK3588]
1

When I tested the HDMI-OUT custom resolution in ArmSom-w3, I encountered adding new resolutions using xrande, and some resolutions in the test resulted in a black screen or a return to the previous resolution. In general, the resolution should be set arbitrarily. Have you ever encountered this problem?

2

Hello, are you having a problem that all the resolutions you want to set cannot be set?

3

No, at present I have encountered some resolution can not be set, such as 832x624 1680x1050 720x480, 1280X1024 is supported

4

Check the dts file for these configurations, if not, please add them and try again

&display_subsystem {
clocks = <&hdptxphy_hdmi_clk0>, <&hdptxphy_hdmi_clk1>;
clock-names = "hdmi0_phy_pll", "hdmi1_phy_pll";
};
 
&hdptxphy_hdmi_clk0 {
            status = "okay";
};
 
&hdptxphy_hdmi_clk1 {
            status = "okay";
};
5

After adding the above code and then testing the custom resolution can be output, may I ask why the corresponding resolution can not be output before

6

This change can be separated from the resolution is equivalent to hdmi0 and hdmi1 hanging to the SOC internal hdmi dedicated pll, is a simple understanding of the pll frequency division, can accurately separate some of your resolution required dclk, so it can be displayed

1 Like
7
  • Okay, thanks again