imx8qm HDMI-TX调试

程序员文章站 2022-05-11 22:59:34

...

HDMI

参考资料

chipset: DS90UB929-Q1
iMX8M HDMI
HDMI之HPD
Linux/DS90UB929-Q1: DS90UB929 HDMI HPD signal is always low

HDMI PIN

无引脚复用

驱动信息

HDP = HDMI + DisplayPort
/home/zengjf/imx8src/imx8qm_android/p9.0.0.0/vendor/nxp-opensource/kernel_imx/drivers/gpu/drm/imx/hdp/imx-hdp.c

i2c error

[email protected]:gpu$ pwd
/home/zengjf/imx8src/imx8qm_android/p9.0.0.0/vendor/nxp-opensource/kernel_imx/drivers/gpu
[email protected]:gpu$ grep dp_aux_init * -R
drm/imx/hdp/imx-hdp.c:  dp_aux_init(&hdp->state, dev);

static int imx_hdp_imx_bind(struct device *dev, struct device *master, void *data)
- dp_aux_init(&hdp->state, dev);
  - struct imx_hdp *hdp = state_to_imx_hdp(state);
  - ret = drm_dp_aux_register(&hdp->aux);
    - ret = drm_dp_aux_register_devnode(aux);
    - ret = i2c_add_adapter(&aux->ddc);

目前发现beta版本的存在问题，是给eDP用的，不是给HDMI输出用的，并且在GA版本HDMI其实也没有注册DDC功能，使用了自定义的EDID；

调试参数及流程

i2creg settings

# Device settings
i2cBus=0x2
deviceAddress=0x14

调试DS90UB929-Q1的时候，主要是看FPD3_STS(0x5A)寄存器状态；
调试发现，是FPD 3信号上的一个电感断路导致FPD握手失败，从而导致HPD一直维持在低电平，进而导致HDMI信号无输出；

DTS

/home/wugn/imx8_p9.0.0_2.0.0_ga/android9.0.0/device/fsl/imx8q/mek_8q/BoardConfig.mk

BOARD_PREBUILT_DTBOIMAGE := out/target/product/mek_8q/dtbo-imx8qm.img
ifeq ($(PRODUCT_IMX_CAR),true)
AB_OTA_PARTITIONS += bootloader
BOARD_OTA_BOOTLOADERIMAGE := out/target/product/mek_8q/bootloader-imx8qm.img
ifeq ($(PRODUCT_IMX_CAR_M4),true)
# imx8qm auto android
TARGET_BOARD_DTS_CONFIG := imx8qm:fsl-imx8qm-mek-car.dtb
# imx8qm auto android virtualization
TARGET_BOARD_DTS_CONFIG += imx8qm-xen:fsl-imx8qm-mek-domu-car.dtb
# imx8qxp auto android
TARGET_BOARD_DTS_CONFIG += imx8qxp:fsl-imx8qxp-mek-car.dtb
# u-boot target for imx8qm_mek auto android
TARGET_BOOTLOADER_CONFIG := imx8qm:imx8qm_mek_androidauto_trusty_defconfig
# u-boot target for imx8qxp_mek auto android
TARGET_BOOTLOADER_CONFIG += imx8qxp:imx8qxp_mek_androidauto_trusty_defconfig
else
# imx8qm auto android without m4 image
TARGET_BOARD_DTS_CONFIG := imx8qm:fsl-imx8qm-mek-car2.dtb
# imx8qxp auto android without m4 image
TARGET_BOARD_DTS_CONFIG += imx8qxp:fsl-imx8qxp-mek-car2.dtb
# u-boot target for imx8qm_mek auto android
TARGET_BOOTLOADER_CONFIG := imx8qm:imx8qm_mek_androidauto2_trusty_defconfig
# u-boot target for imx8qxp_mek auto android
TARGET_BOOTLOADER_CONFIG += imx8qxp:imx8qxp_mek_androidauto2_trusty_defconfig
endif #PRODUCT_IMX_CAR_M4

# u-boot target for imx8qm_mek auto android virtualization
TARGET_BOOTLOADER_CONFIG += imx8qm-xen:imx8qm_mek_androidauto_xen_dual_defconfig
# u-boot target for imx8qm_mek linux which has virtualization enabled
TARGET_BOOTLOADER_CONFIG += imx8qm-xen-dom0:imx8qm_mek_spl_defconfig
else
# imx8qm standard android; MIPI-HDMI display
TARGET_BOARD_DTS_CONFIG := imx8qm:fsl-imx8qm-mek-ov5640.dtb                         # <------------------
# imx8qm standard android; MIPI panel display
TARGET_BOARD_DTS_CONFIG += imx8qm-mipi-panel:fsl-imx8qm-mek-dsi-rm67191.dtb
# imx8qm standard android; HDMI display
TARGET_BOARD_DTS_CONFIG += imx8qm-hdmi:fsl-imx8qm-mek-hdmi.dtb
# imx8qxp standard android; MIPI-HDMI display
TARGET_BOARD_DTS_CONFIG += imx8qxp:fsl-imx8qxp-mek-ov5640.dtb

# u-boot target for imx8qm_mek standard android
TARGET_BOOTLOADER_CONFIG := imx8qm:imx8qm_mek_android_defconfig
# u-boot target for imx8qxp_mek standard android
TARGET_BOOTLOADER_CONFIG += imx8qxp:imx8qxp_mek_android_defconfig
endif #PRODUCT_IMX_CAR

参考/home/wugn/imx8_p9.0.0_2.0.0_ga/android9.0.0/vendor/nxp-opensource/kernel_imx/arch/arm64/boot/dts/freescale/fsl-imx8qm-mek-hdmi.dts中的HDMI的配置；

/home/wugn/imx8_p9.0.0_2.0.0_ga/android9.0.0/vendor/nxp-opensource/kernel_imx/arch/arm64/boot/dts/freescale/fsl-imx8qm-mek-ov5640.dts

&irqsteer_hdmi {
        status = "okay";
};

&hdmi {
        compatible = "fsl,imx8qm-hdmi";
        assigned-clocks = <&clk IMX8QM_HDMI_PXL_SEL>,
                                        <&clk IMX8QM_HDMI_PXL_LINK_SEL>,
                                        <&clk IMX8QM_HDMI_PXL_MUX_SEL>;
        assigned-clock-parents = <&clk IMX8QM_HDMI_AV_PLL_CLK>,
                                                        <&clk IMX8QM_HDMI_AV_PLL_CLK>,
                                                        <&clk IMX8QM_HDMI_AV_PLL_CLK>;
        fsl,no_edid;
        status = "okay";
};

内核HDMI参数

device/fsl/imx8q/mek_8q/BoardConfig.mk

BOARD_KERNEL_CMDLINE := init=/init androidboot.hardware=freescale video=HDMI-A-1:[email protected] fbcon=rotate:1 androidboot.fbTileSupport=enable [email protected] androidboot.primary_display=imx-drm firmware_class.path=/vendor/firmware transparent_hugepage=never

# Default wificountrycode
BOARD_KERNEL_CMDLINE += androidboot.wificountrycode=CN

ifeq ($(PRODUCT_IMX_CAR),true)
BOARD_KERNEL_CMDLINE += galcore.contiguousSize=33554432 video=HDMI-A-2:d
else
BOARD_KERNEL_CMDLINE += androidboot.console=ttyLP0
endif

video格式：video=:x[M][R][-][@][i][m][eDd]
- : Connector, e.g. DVI-I-1, see /sys/class/drm/ for available connectors
- x : resolution
- M: compute a CVT mode?
- R: reduced blanking?
- -: color depth
- @: refresh rate
- i: interlaced (non-CVT mode)
- m: margins?
- e: output forced to on
- d: output forced to off
- D: digital output forced to on (e.g. DVI-I connector)
一定要注意x参数，屏幕的解析度是从这里解析出来的，不是从驱动中获取的；

EDID

/home/wugn/imx8_p9.0.0_2.0.0_ga/android9.0.0/vendor/nxp-opensource/kernel_imx/drivers/gpu/drm/imx/hdp/imx-hdp.c

static struct drm_display_mode edid_cea_modes[] = {
        /* 3 - [email protected] */
        { DRM_MODE("720x480", DRM_MODE_TYPE_DRIVER, 27000, 720, 736,
                   798, 858, 0, 480, 489, 495, 525, 0,
                   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC),
          .vrefresh = 60, .picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, },
        { DRM_MODE("800x480", DRM_MODE_TYPE_DRIVER, 26200, 800, 832,
                   848, 892, 0, 480, 484, 486, 488, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC),
          .vrefresh = 60, .picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE, },
        /* 4 - [email protected] */
        { DRM_MODE("1280x720", DRM_MODE_TYPE_DRIVER, 74250, 1280, 1390,
                   1430, 1650, 0, 720, 725, 730, 750, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC),
          .vrefresh = 60, .picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, },
        /* 16 - [email protected] */
        { DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 148500, 1920, 2008,
                   2052, 2200, 0, 1080, 1084, 1089, 1125, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC),
          .vrefresh = 60, .picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, },
        /* 97 - [email protected] */
        { 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, },
        /* 96 - [email protected] */
        { DRM_MODE("3840x2160", DRM_MODE_TYPE_DRIVER, 297000,
                   3840, 4016, 4104, 4400, 0,
                   2160, 2168, 2178, 2250, 0,
                   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC),
          .vrefresh = 30, .picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, },
};

DS90UB929-Q1初始化

static int ds90ub929_chip_init(struct ds90ub929 *ds90ub929)
{
    int err = 0;
    int reg_data;
    unsigned char reg_addr;
    unsigned char buffer[2];
    /* Configure Registers
      *Note: This is also the hardware reset value for these registers.
      */
/*
    err = ds90ub929_write_checkout(ds90ub929, 0x03, 0xDA);
    if (err)
    {
            pr_err("%s: ds90ub947_single_write failed.", __func__);
            return err;
    }

    err = ds90ub929_write_checkout(ds90ub929, 0x17, 0xDE);
    if (err)
    {
            pr_err("%s: ds90ub947_single_write failed.", __func__);
            return err;
    }
*/

#if 1
/*
a.      0x48 = 0x01
b.      0x49 = 0x00
c.      0x4A = 0x00
d.      0x4B = 0x01
e.      0x4C = 0x00
f.      0x4D = 0x00
g.      0x4E = 0x01
*/
    // https://e2e.ti.com/support/interface/f/138/t/807888
    err = ds90ub929_write_checkout(ds90ub929, 0x48, 0x01);
    msleep(10);
    err = ds90ub929_write_checkout(ds90ub929, 0x49, 0x00);
    msleep(10);
    err = ds90ub929_write_checkout(ds90ub929, 0x4A, 0x00);
    msleep(10);
    err = ds90ub929_write_checkout(ds90ub929, 0x4B, 0x01);
    msleep(10);
    err = ds90ub929_write_checkout(ds90ub929, 0x4C, 0x00);
    msleep(10);
    err = ds90ub929_write_checkout(ds90ub929, 0x4D, 0x00);
    msleep(10);
    err = ds90ub929_write_checkout(ds90ub929, 0x4E, 0x01);
    msleep(100);
#endif

    reg_addr=0x5B;
    reg_data = ds90ub929_read(ds90ub929, reg_addr, 1, buffer);
    ds90_dbg("reg_0x%x = [0x%x]\n",reg_addr,buffer[0]);
    buffer[0] = buffer[0] & (~(0x01 << 5));
    ds90_dbg("reg_0x%x = [0x%x]\n",reg_addr,buffer[0]);
    err = ds90ub929_write_checkout(ds90ub929, reg_addr, buffer[0]);
    msleep(10);

    err = ds90ub929_write_checkout(ds90ub929, 0x16, 0x02);
    msleep(10);

    reg_addr=0x04;
    reg_data = ds90ub929_read(ds90ub929, reg_addr, 1, buffer);
    ds90_dbg("reg_0x%x = [0x%x]\n",reg_addr,buffer[0]);
    buffer[0] = buffer[0] | (0x01 << 4);
    ds90_dbg("reg_0x%x = [0x%x]\n",reg_addr,buffer[0]);
    err = ds90ub929_write_checkout(ds90ub929, reg_addr, buffer[0]);
    msleep(100);

    /*
    – Register 0x40 = 0x10
    – Register 0x41 = 0x49
    – Register 0x42 = 0x10
    – Register 0x42 = 0x00
    */
    err = ds90ub929_write_checkout(ds90ub929, 0x40, 0x10);
    msleep(10);
    err = ds90ub929_write_checkout(ds90ub929, 0x41, 0x49);
    msleep(10);
    err = ds90ub929_write_checkout(ds90ub929, 0x42, 0x10);
    msleep(10);
    err = ds90ub929_write_checkout(ds90ub929, 0x42, 0x00);
    msleep(10);

    /*
    – Register 0x40 = 0x14
    – Register 0x41 = 0x49
    – Register 0x42 = 0x10
    – Register 0x42 = 0x00
    */
    err = ds90ub929_write_checkout(ds90ub929, 0x40, 0x14);
    msleep(10);
    err = ds90ub929_write_checkout(ds90ub929, 0x41, 0x49);
    msleep(10);
    err = ds90ub929_write_checkout(ds90ub929, 0x42, 0x10);
    msleep(10);
    err = ds90ub929_write_checkout(ds90ub929, 0x42, 0x00);
    msleep(10);

    //tp_rst_thread_init();

    return 0;
}

imx8qm HDMI-TX调试

HDMI

参考资料

HDMI PIN

驱动信息

i2c error

调试参数及流程

DTS

内核HDMI参数

EDID

DS90UB929-Q1初始化

Mysql LONGBLOB 类型存储二进制数据 (修改+调试+整理)

Mysql 插入中文及中文查询 (修改+调试)

Mysql LONGTEXT 类型存储大文件(二进制也可以) (修改+调试+整理)

MLSQL Stack如何让流调试更加简单详解

用python + hadoop streaming 分布式编程（一） -- 原理介绍，样例程序与本地调试

VS2008导出dll库以及程序调试的图文步骤

Wing IDE如何进行命令行调试

如何调试Linux shell脚本

代码调试console对象的花式玩法

Visual Studio中11个强大的调试技巧和方法