HDMI接口新增特殊分辨率时序

george

DRM 框架目前代码已经支持了绝大部分分辨率时序，但是部分 HDMI 屏幕旋转的场景下，可能还有一些特殊分辨率不支持。需要在 kernel\drivers\gpu\drm\drm_edid.c 中的drm_dmt_modes 的末尾新增项目：

/* 0x58 - 4096x2160@59.94Hz RB */
{ DRM_MODE("4096x2160", DRM_MODE_TYPE_DRIVER, 556188, 4096, 4104,
4136, 4176, 0, 2160, 2208, 2216, 2222, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },

顾真牛

@george 像素时钟 Pixel Clock 去查是三位数。。。是不是后面直接加三个零？

顾真牛

@george

添加了下面几行，然并卵

	/* 0x59 - 3840x1080@120Hz RB */		   
	{ DRM_MODE("3840x1080", DRM_MODE_TYPE_DRIVER, 540000, 3840, 3848,
		   3880, 3920, 0, 1080, 1130, 1138, 1144, 0,
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
	/* 0x60 - 3840x1100@60Hz RB */		   
	{ DRM_MODE("3840x1100", DRM_MODE_TYPE_DRIVER, 282890, 3840, 3848,
		   3880, 3920, 0, 1100, 1118, 1126, 1132, 0,
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },

edid信息如下
Detailed Timing Descriptors:
DTD 1: 3840x1100 59.998 Hz 192:55 68.998 kHz 282.890 MHz (1196 mm x 336 mm)
Hfront 48 Hsync 32 Hback 180 Hpol P
Vfront 3 Vsync 5 Vback 42 Vpol N
Display Range Limits:
Monitor ranges (GTF): 48-120 Hz V, 30-180 kHz H, max dotclock 600 MHz
DTD 2: 3840x1080 120.000 Hz 32:9 135.000 kHz 540.000 MHz (1196 mm x 336 mm)
Hfront 48 Hsync 64 Hback 48 Hpol P
Vfront 3 Vsync 10 Vback 32 Vpol N
Display Product Name: 'HDMI'
Extension blocks: 1
Checksum: 0x24

我这应该怎么填？

顾真牛

@george

https://www.cool-pi.com/topic/131/coolpi-4b-linux-kernel开发在线更新说明?_=1680497887440

用这个更新内核没错吧？？似乎没啥效果啊

根据

    DTD 1:  3840x1100   59.998 Hz 192:55   68.998 kHz 282.890 MHz (1196 mm x 336 mm)
                 Hfront   48 Hsync  32 Hback 180 Hpol P
                 Vfront    3 Vsync   5 Vback  42 Vpol N

最终添加了一个

	/* 0x59 - 3840x1100@60Hz RB */		   
	{ DRM_MODE("3840x1100", DRM_MODE_TYPE_DRIVER, 282890, 3840, 3888,
		   4068, 4224, 0, 1100, 1103, 1108, 1108, 0,
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },

george

@顾真牛插拔HDMI然后打印dmesg发上来。

顾真牛

@george dmesg.txt

george

@顾真牛改为动态分频测试一下

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-cpcm5-evb.dts b/arch/arm64/boot/dts/rockchip/rk3588-cpcm5-evb.dts
index da170f0b2086..3f01ba675516 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-cpcm5-evb.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588-cpcm5-evb.dts
@@ -1015,6 +1015,10 @@ &hdptxphy_hdmi0 {
        status = "okay";
 };
 
+&hdptxphy_hdmi_clk0 {
+status = "okay";
+};
+
 #if 1
 &hdmi1 {
        enable-gpios = <&gpio4 RK_PB2 GPIO_ACTIVE_HIGH>;
@@ -1044,6 +1048,10 @@ &route_hdmi1 {
 &hdptxphy_hdmi1 {
        status = "okay";
 };
+
+&hdptxphy_hdmi_clk1 {
+status = "okay";
+};
 #endif
 
 &dp0 {
@@ -1304,6 +1312,8 @@ &uart2 {
 };
 
 &display_subsystem {
+       clocks = <&hdptxphy_hdmi_clk0>, <&hdptxphy_hdmi_clk1>;
+       clock-names = "hdmi0_phy_pll", "hdmi1_phy_pll";
        memory-region = <&drm_logo>;
        memory-region-names = "drm-logo";
 };