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RK3399 HDMI接口的知识点汇总，绝对实用

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问答对人有帮助，内容完整，我也想知道答案 0 RK3399 HDMI接口的知识点汇总，绝对实用 0
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答案对人有帮助，有参考价值 0 涉及文件 kernel/drivers/gpu/drm/drm_edid.c kernel/drivers/gpu/drm/rockchip/inno_hdmi.c kernel/drivers/gpu/drm/rockchip/inno_hdmi.h kernel/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c kernel/drivers/video/rockchip/hdmi/rockchip-hdmi.h kernel/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c device/rockchip/rk3399/rk3399_all/system.prop frameworks/base/services/core/jni/com_android_server_rkdisplay_RkDisplayModes.cpp kernel部分代码 edid相关代码 kernel/drivers/gpu/drm/drm_edid.c /* * Probably taken from CEA-861 spec. * This table is converted from xorg's hw/xfree86/modes/xf86EdidModes.c. * * Index using the VIC. / static const struct drm_display_mode edid_cea_modes[] = { ... / 5 - 1920x1080i@60Hz / { DRM_MODE("1920x1080i", DRM_MODE_TYPE_DRIVER, 74250, 1920, 2008, 2052, 2200, 0, 1080, 1084, 1094, 1125, 0, DRM_MODE_FLAG_PHSYNC \| DRM_MODE_FLAG_PVSYNC \| DRM_MODE_FLAG_INTERLACE), .vrefresh = 60, .picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, }, ... ------------------ drm_add_edid_modes add_detailed_modes do_detailed_mode drm_mode_detailed include/drm/drm_edid.h struct edid { u8 header[8]; / Vendor & product info / u8 mfg_id[2]; u8 prod_code[2]; u32 serial; / FIXME: byte order / u8 mfg_week; u8 mfg_year; / EDID version / u8 version; u8 revision; / Display info: / u8 input; u8 width_cm; u8 height_cm; u8 gamma; u8 features; / Color characteristics / u8 red_green_lo; u8 black_white_lo; u8 red_x; u8 red_y; u8 green_x; u8 green_y; u8 blue_x; u8 blue_y; u8 white_x; u8 white_y; / Est. timings and mfg rsvd timings/ struct est_timings established_timings; / Standard timings 1-8/ struct std_timing standard_timings[8]; / Detailing timings 1-4 / struct detailed_timing detailed_timings[4]; / Number of 128 byte ext. blocks / u8 extensions; / Checksum / u8 checksum; } __attribute__((packed)); drivers/gpu/drm/bridge/synopsys/dw-hdmi.c static int dw_hdmi_connector_get_modes(struct drm_connector connector) { struct dw_hdmi hdmi = container_of(connector, struct dw_hdmi, connector); struct edid edid; struct drm_display_mode mode; const u8 def_modes[6] = {97, 16, 31, 19, 17, 2}; struct drm_display_info info = &connector->display_info; struct hdr_static_metadata metedata = &connector->display_info.hdmi.hdr_panel_metadata; int i, ret = 0; if (!hdmi->ddc) return 0; edid = drm_get_edid(connector, hdmi->ddc); edid = NULL; if (edid) { dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]n", edid->width_cm, edid->height_cm); hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid); hdmi->sink_has_audio = drm_detect_monitor_audio(edid); drm_mode_connector_update_edid_property(connector, edid); cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier, edid); ret = drm_add_edid_modes(connector, edid); / Store the ELD / drm_edid_to_eld(connector, edid); drm_mode_connector_update_hdr_property(connector, metedata); kfree(edid); } else { hdmi->sink_is_hdmi = true; hdmi->sink_has_audio = true; for (i = 0; i < sizeof(def_modes); i++) { mode = drm_display_mode_from_vic_index(connector, def_modes, 31, i); if (mode) { if (!i) mode->type = DRM_MODE_TYPE_PREFERRED; drm_mode_probed_add(connector, mode); ret++; } } info->edid_hdmi_dc_modes = 0; info->hdmi.y420_dc_modes = 0; info->color_formats = 0; dev_info(hdmi->dev, "failed to get edidn"); } return ret; } HDMI 纵横比查看edid_cea_modes[]，我们发现同一个分辨率会对应几个不同的参数结构体，例如： / 97 - 3840x2160p@60Hz 16:9 / { DRM_MODE("3840x2160", DRM_MODE_TYPE_DRIVER, 594000, 3840, 4016, 4104, 4400, 0, 2160, 2168, 2178, 2250, 0, DRM_MODE_FLAG_PHSYNC \| DRM_MODE_FLAG_PVSYNC), .vrefresh = 60, .picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, }, / 107 - 3840x2160p@60Hz 64:27 / { DRM_MODE("3840x2160", DRM_MODE_TYPE_DRIVER, 594000, 3840, 4016, 4104, 4400, 0, 2160, 2168, 2178, 2250, 0, DRM_MODE_FLAG_PHSYNC \| DRM_MODE_FLAG_PVSYNC), .vrefresh = 60, .picture_aspect_ratio = HDMI_PICTURE_ASPECT_64_27, }, 显示参数基本相同，唯一的区别在于图像纵横比picture_aspect_ratio，一般有如下几种配置： HDMI_PICTURE_ASPECT_4_3 HDMI_PICTURE_ASPECT_16_9 HDMI_PICTURE_ASPECT_256_135 HDMI_PICTURE_ASPECT_64_27 该参数需要与屏幕的纵横比相匹配。热插拔处理逻辑 kernel/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c dw_hdmi_rockchip_bind dw_hdmi_bind kernel/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c int dw_hdmi_bind(struct device dev, struct device master, void data, struct drm_encoder encoder, struct resource iores, int irq, const struct dw_hdmi_plat_data plat_data) init_hpd_work(hdmi); initialize_hdmi_ih_mutes(hdmi); ret = devm_request_threaded_irq(dev, irq, dw_hdmi_hardirq, dw_hdmi_irq, IRQF_SHARED, dev_name(dev), hdmi); init_hpd_work INIT_DELAYED_WORK(&hdmi->work, repo_hpd_event); repo_hpd_event devm_request_threaded_irq dw_hdmi_hardirq dw_hdmi_irq check_hdmi_irq Android部分代码 persist.sys.resolution.main persist.sys.resolution.aux static void nativeSaveConfig(JNIEnv env, jobject obj) { char buf[BUFFER_LENGTH]; bool isMainHdmiConnected=false; bool isAuxHdmiConnected = false; int foundMainIdx=-1,foundAuxIdx=-1; struct file_base_paramer base_paramer; if (primary != NULL) { std::vector mModes = primary->modes(); char resolution[PROPERTY_VALUE_MAX]; unsigned int w=0,h=0,hsync_start=0,hsync_end=0,htotal=0; unsigned int vsync_start=0,vsync_end=0,vtotal=0,flags=0; float vfresh=0.0000; property_get("persist.sys.resolution.main", resolution, "0x0@0.00-0-0-0-0-0-0-0"); if (strncmp(resolution, "Auto", 4) != 0 && strncmp(resolution, "0x0p0-0", 7) !=0) sscanf(resolution,"%dx%d@%f-%d-%d-%d-%d-%d-%d-%x", &w, &h, &vfresh, &hsync_start,&hsync_end, &htotal,&vsync_start,&vsync_end, &vtotal, &flags); for (size_t c = 0; c < mModes.size(); ++c){ const DrmMode& info = mModes[c]; char curDrmModeRefresh[16]; char curRefresh[16]; float mModeRefresh; if (info.flags() & DRM_MODE_FLAG_INTERLACE) mModeRefresh = info.clock()2 / (float)(info.v_total() info.h_total()) * 1000.0f; else mModeRefresh = info.clock()/ (float)(info.v_total()* info.h_total()) * 1000.0f; sprintf(curDrmModeRefresh, "%.2f", mModeRefresh); sprintf(curRefresh, "%.2f", vfresh); if (info.h_display() == w && info.v_display() == h && info.h_sync_start() == hsync_start && info.h_sync_end() == hsync_end && info.h_total() == htotal && info.v_sync_start() == vsync_start && info.v_sync_end() == vsync_end && info.v_total()==vtotal && atof(curDrmModeRefresh)==atof(curRefresh)) { ALOGD("*********************found main idx %d *************", (int)c); foundMainIdx = c; sprintf(buf, "display=%d,iface=%d,enable=%d,mode=%sn", primary->display(), primary->get_type(), primary->state(), resolution); break; } } } if (extend != NULL) { std::vector mModes = extend->modes(); char resolution[PROPERTY_VALUE_MAX]; unsigned int w=0,h=0,hsync_start=0,hsync_end=0,htotal=0; unsigned int vsync_start=0,vsync_end=0,vtotal=0,flags; float vfresh=0; property_get("persist.sys.resolution.aux", resolution, "0x0@0.00-0-0-0-0-0-0-0"); if (strncmp(resolution, "Auto", 4) != 0 && strncmp(resolution, "0x0p0-0", 7) !=0) sscanf(resolution,"%dx%d@%f-%d-%d-%d-%d-%d-%d-%x", &w, &h, &vfresh, &hsync_start,&hsync_end,&htotal,&vsync_start,&vsync_end, &vtotal, &flags); for (size_t c = 0; c < mModes.size(); ++c){ const DrmMode& info = mModes[c]; char curDrmModeRefresh[16]; char curRefresh[16]; float mModeRefresh; if (info.flags() & DRM_MODE_FLAG_INTERLACE) mModeRefresh = info.clock()2 / (float)(info.v_total()* info.h_total()) * 1000.0f; else mModeRefresh = info.clock()/ (float)(info.v_total()* info.h_total()) * 1000.0f; sprintf(curDrmModeRefresh, "%.2f", mModeRefresh); sprintf(curRefresh, "%.2f", vfresh); if (info.h_display() == w && info.v_display() == h && info.h_sync_start() == hsync_start && info.h_sync_end() == hsync_end && info.h_total() == htotal && info.v_sync_start() == vsync_start && info.v_sync_end() == vsync_end && info.v_total()==vtotal && atof(curDrmModeRefresh)==atoi(curRefresh)) { ALOGD("*********************found aux idx %d *************", (int)c); foundAuxIdx = c; break; } } } ... ... static void nativeSetMode(JNIEnv env, jobject obj, jint dpy,jint iface_type, jstring mode) { int display = dpy; int type = iface_type; const char* mMode = env->GetStringUTFChars(mode, NULL); ALOGD("nativeSetMode %s display %d iface_type %d", mMode, display, type); if (display == HWC_DISPLAY_PRIMARY){ property_set("persist.sys.resolution.main", mMode); } else if (display == HWC_DISPLAY_EXTERNAL) { property_set("persist.sys.resolution.aux", mMode); } } device/rockchip/rk3399/rk3399_all/system.prop persist.sys.resolution.aux=3840x2160p30 文件系统显示接口查看当前HDMI屏分辨率支持列表 # cat /sys/class/drm/card0-HDMI-A-1/modes 3840x2160p60 3840x2160p60 3840x2160p60 3840x2160p50 3840x2160p30 3840x2160p30 3840x2160p30 3840x2160p25 3840x2160p24 3840x2160p24 1920x2160p60 2560x1440p60 1920x1080p60 1920x1080p60 1920x1080p50 1680x1050p60 1280x1024p75 1280x1024p60 1440x900p60 1280x960p60 1280x720p60 1280x720p60 1280x720p50 1024x768p75 1024x768p70 1024x768p60 832x624p75 800x600p75 800x600p72 800x600p60 800x600p56 720x576p50 720x480p60 720x480p60 640x480p75 640x480p73 640x480p67 640x480p60 640x480p60 720x400p70 当前的显示分辨率 # cat /sys/class/drm/card0-HDMI-A-1/mode 3840x2160p60 查看EDID信息 # cat sys/class/drm/card0-HDMI-A-1/edid \| busybox hexdump 0000000 ff00 ffff ffff 00ff e305 2790 8b64 0000 0000010 1d11 0301 3c80 7822 672a a5a1 4d55 27a2 0000020 500e bf54 00ef c0d1 00b3 0095 8081 4081 0000030 c081 0101 0101 d04d a000 70f0 803e 2030 0000040 0035 5055 0021 1a00 66a3 a000 70f0 801f 0000050 2030 0035 5055 0021 1a00 0000 fc00 5500 0000060 3732 3039 0a42 2020 2020 2020 0000 fd00 0000070 1700 1e50 3ca0 0a00 2020 2020 2020 c901 0000080 0302 f133 904c 0304 131f 1201 5e5d 605f 0000090 2361 0709 8307 0001 6d00 0c03 1000 3800 00000a0 2078 6000 0201 6703 5dd8 01c4 8078 e303 00000b0 000f 560c 005e a0a0 29a0 3050 3520 5500 00000c0 2150 0000 021e 803a 7118 2d38 5840 452c 00000d0 5500 2150 0000 011e 001d 5172 1ed0 6e20 00000e0 5528 5500 2150 0000 4d1e 806c 70a0 3e70 00000f0 3080 3a20 5500 2150 0000 001a 0000 4e00 0000100 强行开关显示设备关HDMI: echo off > /sys/class/drm/card0-HDMI-A-1/status 开HDMI: echo on > /sys/class/drm/card0-HDMI-A-1/status VOP的状态 # cat /sys/kernel/debug/dri/0/summary VOP [ff900000.vop]: ACTIVE Connector: HDMI-A overlay_mode[1] bus_format[2025] output_mode[f] color_space[3] Display mode: 3840x2160p60 clk[533250] real_clk[533250] type[48] flag[9] H: 3840 3888 3920 4000 V: 2160 2163 2168 2222 win0-0: ACTIVE format: AR24 little-endian (0x34325241) SDR[0] color_space[0] csc: y2r[0] r2r[0] r2y[1] csc mode[1] zpos: 0 src: pos[0x0] rect[3840x2160] dst: pos[0x0] rect[3840x2160] buf[0]: addr: 0x0000000004000000 pitch: 15360 offset: 0 win1-0: DISABLED win2-0: DISABLED win2-1: DISABLED win2-2: DISABLED win2-3: DISABLED win3-0: DISABLED win3-1: DISABLED win3-2: DISABLED win3-3: DISABLED post: sdr2hdr[0] hdr2sdr[0] pre : sdr2hdr[0] post CSC: r2y[0] y2r[0] CSC mode[1] VOP [ff8f0000.vop]: DISABLED HDMI当前输出状态 # cat /sys/kernel/debug/dw-hdmi/status PHY: enabled Mode: HDMI Pixel Clk: 533250000Hz TMDS Clk: 133312500Hz Color Format: YUV444 Color Depth: 8 bit Colorimetry: ITU.BT709 EOTF: Off 其他功能接口 xrandr指令配置HDMI $ xrandr Screen 0: minimum 320 x 200, current 3840 x 2160, maximum 8192 x 8192 HDMI-1 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 597mm x 336mm 3840x2160 60.00+ 60.00 50.00 59.94 30.00 25.00 24.00 29.97 23.98 29.98 1920x2160 59.99 2560x1440 59.95 1920x1080 60.00 50.00 59.94 1680x1050 59.88 1280x1024 75.02 60.02 1440x900 59.90 1280x960 60.00 1280x720 60.00 50.00 59.94 1024x768 75.03 70.07 60.00 832x624 74.55 800x600 72.19 75.00 60.32 56.25 720x576 50.00 720x480 60.00 59.94 640x480 75.00 72.81 66.67 60.00 59.94 720x400 70.08 使用 xrandr 设置不同的分辨率 $ xrandr --output HDMI-1 --mode 3840x2160 $ xrandr --output HDMI-1 --mode 3840x2160 --rate 30 $ xrandr Screen 0: minimum 320 x 200, current 3840 x 2160, maximum 8192 x 8192 HDMI-1 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 597mm x 336mm 3840x2160 60.00 + 60.00 50.00 59.94 30.00 25.00 24.00 29.97 23.98 29.98 1920x2160 59.99 2560x1440 59.95 1920x1080 60.00 50.00 59.94 1680x1050 59.88 1280x1024 75.02 60.02 1440x900 59.90 1280x960 60.00 1280x720 60.00 50.00 59.94 1024x768 75.03 70.07 60.00 832x624 74.55 800x600 72.19 75.00 60.32 56.25 720x576 50.00 720x480 60.00 59.94 640x480 75.00 72.81 66.67 60.00 59.94 720x400 70.08 运行gtf或者cvt，查询某分辨率的有效扫描频率 $ gtf 3840 2160 30 # 3840x2160 @ 30.00 Hz (GTF) hsync: 65.91 kHz; pclk: 339.57 MHz Modeline "3840x2160_30.00" 339.57 3840 4080 4496 5152 2160 2161 2164 2197 -HSync +Vsync $ cvt 3840 2160 30 # 3840x2160 29.98 Hz (CVT) hsync: 65.96 kHz; pclk: 338.75 MHz Modeline "3840x2160_30.00" 338.75 3840 4080 4488 5136 2160 2163 2168 2200 -hsync +vsync 通过–newmode参数新建一种xrandr模式 $ xrandr --newmode "3840x2160_30.00" 338.75 3840 4080 4488 5136 2160 2163 2168 2200 -hsync +vsync 新建模式后，我们需要把这模式添加到当前的输出设备HDMI-1 $ xrandr --addmode HDMI-1 3840x2160_30.00 设置该模式输出 $ xrandr --output HDMI-1 --mode 3840x2160_30.00

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