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怎样给RK3288 HDMI添加新的分辨率呢

问答对人有帮助，内容完整，我也想知道答案 0 怎样给RK3288 HDMI添加新的分辨率呢？有哪些添加步骤？ 0 RK3288 HDMI增加特殊分辨率.pdf 93.36 KB , 下载次数: 20
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答案对人有帮助，有参考价值 0 1、修改文件，打开调试模式，得到 EDID 信息后，记得关闭 diff --git a/kernel/drivers/video/fbmon.c b/kernel/drivers/video/fbmon.c index 6103fa6..ce9b11e 100755 --- a/kernel/drivers/video/fbmon.c +++ b/kernel/drivers/video/fbmon.c @@ -43,7 +43,8 @@ * EDID parser / -#undef DEBUG / define this for verbose EDID parsing output / +//#undef DEBUG / define this for verbose EDID parsing output / +#define DEBUG #ifdef DEBUG #define DPRINTK(fmt, args...) printk(fmt,## args) 2、打印出 EDID 信息 [ 0.805638] ======================================== [ 0.805652] Display Information (EDID) [ 0.805662] ======================================== [ 0.805672] EDID Version 1.3 [ 0.805682] Manufacturer: ROW [ 0.805691] Model: 0 [ 0.805699] Serial#: 0 [ 0.805708] Year: 2014 Week 12 [ 0.805719] Monitor Name: AAA [ 0.805728] Display Characteristics: [ 0.805738] Monitor Operating Limits: From EDID [ 0.805754] H: 30-80KHz V: 50-76Hz DCLK: 160MHz [ 0.805764] Digital Display Input Sync: [ 0.805780] Max H-size in cm: variable [ 0.805791] Max V-size in cm: variable [ 0.805801] Gamma: 1.0 [ 0.805813] DPMS: Active yes, Suspend no, Standby yes [ 0.805823] Unknown [ 0.805832] Chroma [ 0.805840] RedX: 0.636 RedY: 0.349 [ 0.805852] GreenX: 0.290 GreenY: 0.589 [ 0.805863] BlueX: 0.143 BlueY: 0.080 [ 0.805875] WhiteX: 0.313 WhiteY: 0.329 [ 0.805886] First DETAILED Timing is preferred [ 0.805899] Detailed Timings [ 0.805910] 40 MHz 800 840 968 1056 600 601 605 628 +HSync +VSync [ 0.805932] Supported VESA Modes [ 0.805945] 720x400@70Hz [ 0.805955] 640x480@60Hz [ 0.805964] 640x480@72Hz [ 0.805972] 640x480@75Hz [ 0.805980] 800x600@56Hz [ 0.805988] 800x600@60Hz [ 0.805997] 800x600@72Hz [ 0.806005] 800x600@75Hz [ 0.806014] Manufacturer's mask: 0 [ 0.806023] Standard Timings [ 0.806034] ======================================== Detailed Timings 是主要的 LCD 参数，Supported VESA Modes 是 LCD 支持的分辨率。通过源码查看各参数的含义：路径：kernel/drivers/video/fbmon.c DPRINTK(" %d MHz ", PIXEL_CLOCK/1000000); DPRINTK("%d %d %d %d ", H_ACTIVE, H_ACTIVE + H_SYNC_OFFSET, H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH, H_ACTIVE + H_BLANKING); DPRINTK("%d %d %d %d ", V_ACTIVE, V_ACTIVE + V_SYNC_OFFSET, V_ACTIVE + V_SYNC_OFFSET + V_SYNC_WIDTH, V_ACTIVE + V_BLANKING); DPRINTK("%sHSync %sVSyncnn", (HSYNC_POSITIVE) ? "+" : "-", (VSYNC_POSITIVE) ? "+" : "-"); 由此可以得到 LCD 的各参数： 40M = PIXEL_CLOCK = pixclock 800 = H_ACTIVE = xres 840 = H_ACTIVE + H_SYNC_OFFSET = xres + h_fp = 800 + 40 968 = H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH = xres + h_fp + h_pw = 800 + 40 + 128 1056 = H_ACTIVE + H_BLANKING = xres + h_bp + h_fp + h_pw = 800 + 88 + 40 + 128 600 = V_ACTIVE = yres 601 = V_ACTIVE + V_SYNC_OFFSET = yres + v_fp = 600 + 1 605 = V_ACTIVE + V_SYNC_OFFSET + V_SYNC_WIDTH = yres + v_fp + v_pw = 600 + 1 + 4 628 = V_ACTIVE + V_BLANKING = yres + v_bp + v_fp + v_pw = 600 + 23 + 1 + 4 +HSync = HSYNC_POSITIVE +VSync = VSYNC_POSITIVE 3、在枚举中增加此分辨率，枚举值为 108，并修改默认分辨率 diff --git a/kernel/drivers/video/rockchip/hdmi/rockchip-hdmi.h b/kernel/drivers/video/rockchip/hdmi/rockchip-hdmi.h index b5475e4..f31f5b9 100755 --- a/kernel/drivers/video/rockchip/hdmi/rockchip-hdmi.h +++ b/kernel/drivers/video/rockchip/hdmi/rockchip-hdmi.h @@ -129,6 +129,7 @@ enum hdmi_video_infomation_code { HDMI_3840X2160P_30HZ_4_3, /105/ HDMI_3840X2160P_50HZ_4_3, HDMI_3840X2160P_60HZ_4_3, + HDMI_800X600P_60HZ, /108/ }; / HDMI Extended Resolution / @@ -474,7 +475,7 @@ struct hdmi { #define HDMI_AUTO_CONFIG false / HDMI default vide mode / -#define HDMI_VIDEO_DEFAULT_MODE HDMI_1920X1080P_60HZ//HDMI_1280X720P_60HZ +#define HDMI_VIDEO_DEFAULT_MODE HDMI_800X600P_60HZ//HDMI_1920X1080P_60HZ//HDMI_1280X720P_60HZ /HDMI_1920X1080P_60HZ/ #define HDMI_VIDEO_DEFAULT_COLORMODE HDMI_COLOR_AUTO #define HDMI_VIDEO_DEFAULT_COLORDEPTH 8 4、将屏参数据添加到数组 static const struct hdmi_video_timing hdmi_mode[] 中 / name refresh xres yres pixclock h_bp h_fp v_bp v_fp h_pw v_pw polariry PorI flag vic 2ndvic pixelrepeat interface / / 名称刷新频率行像素列像素像素时钟水平后沿水平前沿垂直后沿垂直前沿行同步脉宽列同步脉宽极性扫描方式标志枚举值第二枚举值像素重复接口*/ diff --git a/kernel/drivers/video/rockchip/hdmi/rockchip-hdmi-lcdc.c b/kernel/drivers/video/rockchip/hdmi/rockchip-hdmi-lcdc.c index 63a5cfb..0f920c2 100755 --- a/kernel/drivers/video/rockchip/hdmi/rockchip-hdmi-lcdc.c +++ b/kernel/drivers/video/rockchip/hdmi/rockchip-hdmi-lcdc.c @@ -7,6 +7,7 @@ static const struct hdmi_video_timing hdmi_mode[] = { { { "720x576i@50Hz", 50, 720, 576, 27000000, 69, 12, 19, 2, 63, 3, 0, 1, 0 }, 21, HDMI_720X576I_50HZ_16_9, 2, OUT_P888}, { { "720x480p@60Hz", 60, 720, 480, 27000000, 60, 16, 30, 9, 62, 6, 0, 0, 0 }, 2, HDMI_720X480P_60HZ_16_9, 1, OUT_P888}, { { "720x576p@50Hz", 50, 720, 576, 27000000, 68, 12, 39, 5, 64, 5, 0, 0, 0 }, 17, HDMI_720X576P_50HZ_16_9, 1, OUT_P888}, + { { "800x600p@60Hz", 60, 800, 600, 40000000, 88, 40, 23, 1, 128, 4, FB_SYNC_HOR_HIGH_ACT \| FB_SYNC_VERT_HIGH_ACT, 0, 0}, 108, HDMI_800X600P_60HZ, 1, OUT_P888}, { { "1280x720p@24Hz", 24, 1280, 720, 59400000, 220, 1760, 20, 5, 40, 5, FB_SYNC_HOR_HIGH_ACT \| FB_SYNC_VERT_HIGH_ACT, 0, 0}, 60, HDMI_1280X720P_24HZ_4_3, 1, OUT_P888}, { { "1280x720p@25Hz", 25, 1280, 720, 74250000, 220, 2420, 20, 5, 40, 5, FB_SYNC_HOR_HIGH_ACT \| FB_SYNC_VERT_HIGH_ACT, 0, 0}, 61, HDMI_1280X720P_25HZ_4_3, 1, OUT_P888}, { { "1280x720p@30Hz", 30, 1280, 720, 74250000, 220, 1760, 20, 5, 40, 5, FB_SYNC_HOR_HIGH_ACT \| FB_SYNC_VERT_HIGH_ACT, 0, 0}, 62, HDMI_1280X720P_30HZ_4_3, 1, OUT_P888}, polariry：水平同步高电平有效和垂直同步高电平有效 PorI：0 为不是隔行扫描。定义文件路径：/kernel/include/uapi/linux/fb.h flag：不知道什么意思 vic：在分辨率枚举中的编号，本次添加的为 108 5、此时 HDMI 可以正常输入 800x600 的分辨率，但是实际显示可能有问题。根据显示器的 EDID 修改 dts 中加载的屏参文件，修改值与添加到 HDMI 数组中的相同。 diff --git a/kernel/arch/arm/boot/dts/lcd-800x600.dtsi b/kernel/arch/arm/boot/dts/lcd-800x600.dtsi index c0baf15..733a157 100755 --- a/kernel/arch/arm/boot/dts/lcd-800x600.dtsi +++ b/kernel/arch/arm/boot/dts/lcd-800x600.dtsi @@ -15,12 +15,12 @@ clock-frequency = <40000000>; - hactive = <1920>; - vactive = <1080>; - hback-porch = <126>; - hfront-porch = <120>; - vback-porch = <10>; - vfront-porch = <10>; - hsync-len = <10>; - vsync-len = <8>; + hactive = <800>; + vactive = <600>; + hback-porch = <88>; + hfront-porch = <40>; + vback-porch = <23>; + vfront-porch = <1>; + hsync-len = <128>; + vsync-len = <4>; hsync-active = <0>; vsync-active = <0>; de-active = <0>; 6、编译烧录，HDMI 显示正常，确认当前分辨率可以在设置 -> HDMI ->分辨率设置中查看，也可以通过指令查看。 $ cat /sys/class/display/HDMI/mode

2022-3-10 14:45:22 评论举报刘双喜