SN65DSI86: 芯片的应用问题

我们项目用到 SN65DSI86 mipi to eDP, 现在只有背光，无画面，color bar 也没有显示，需要排查哪些？帮忙指导下.

软件和原理图见下面：

VOID sn65dsi86_regInit(VOID)
{sn65dsi86_write(SW_RST,0x00);sn65dsi86_write(CLK_REG_0A, 0x03);// REFCLK_FREQ/DPPLL_CLK_SRCsn65dsi86_write(CLK_REG_0D, 0x00);//songersn65dsi86_write(DSI_REG_10, 0x26);//songersn65dsi86_write(DSI_REG_11, 0x00);//songersn65dsi86_write(DSI_REG_12, 0x4c);//songer  --------..note  CHA_DSI_CLK_RANGE  0x50 400 < 405sn65dsi86_write(DSI_REG_13, 0x4c); //chanel Bsn65dsi86_write(VIDEO_REG_20, 0x80);//songer,the length in pixels of the active horizontal line for Channel Asn65dsi86_write(VIDEO_REG_21, 0x07);//songer,the length in pixels of the active horizontal line for Channel Asn65dsi86_write(VIDEO_REG_22, 0x00); //chanel Bsn65dsi86_write(VIDEO_REG_23, 0x00); //Chanel Bsn65dsi86_write(VIDEO_REG_24, 0x38);// the vertical display size in lines for Channel Asn65dsi86_write(VIDEO_REG_25, 0x04);// the vertical display size in lines for Channel Asn65dsi86_write(VIDEO_REG_2C, 0x13);// CHA_HSYNC_PULSE_WIDTH_LOW -------...notesn65dsi86_write(VIDEO_REG_2D, 0x00);// CHA_HSYNC_POLARITY/CHA_HSYNC_PULSE_WIDTH_HIGH ------...notesn65dsi86_write(VIDEO_REG_30, 0x08);// CHA_VSYNC_PULSE_WIDTH_LOW  -----..notesn65dsi86_write(VIDEO_REG_31, 0x00);//CHA_VSYNC_POLARITY/CHA_VSYNC_PULSE_WIDTH_HIGH ----...notesn65dsi86_write(VIDEO_REG_34, 0x14);//CHA_HORIZONTAL_BACK_PORCHsn65dsi86_write(VIDEO_REG_36, 0x0b);//CHA_VERTICAL_BACK_PORCHsn65dsi86_write(VIDEO_REG_38, 0x1e);//CHA_HORIZONTAL_FRONT_PORCHsn65dsi86_write(VIDEO_REG_3A, 0x0c);//CHA_VERTICAL_FRONT_PORCHsn65dsi86_write(VIDEO_REG_3C, 0x10); // songer COLOR_BAR_EN-->1sn65dsi86_write(VIDEO_REG_3D, 0x00); // songersn65dsi86_write(VIDEO_REG_3E, 0x00); // songersn65dsi86_write(DP_SPEC_REG_5B, 0x00); // songersn65dsi86_write(LK_TRAIN_REG_93, 0x34);//songersn65dsi86_write(LK_TRAIN_REG_94, 0xe0);//songersn65dsi86_write(DP_SPEC_REG_5C, 0x01); // songersn65dsi86_write(DP_SPEC_REG_5A, 0x05);// default 0x05, IDLE pattern enablesn65dsi86_write(CLK_REG_0D, 0x01);//songer pll_enableMDP_OSAL_DELAYMS(10);sn65dsi86_DebugDumpReg(CLK_REG_0D);sn65dsi86_write(I2C_OVER_AUX_REG_64, 0x01);sn65dsi86_write(I2C_OVER_AUX_REG_74, 0x00);sn65dsi86_write(I2C_OVER_AUX_REG_75, 0x01);sn65dsi86_write(I2C_OVER_AUX_REG_76, 0x0A);sn65dsi86_write(I2C_OVER_AUX_REG_77, 0x01);sn65dsi86_write(I2C_OVER_AUX_REG_78, 0x81);MDP_OSAL_DELAYMS(10);sn65dsi86_write(LK_TRAIN_REG_96, 0x0a);// 01 --> 0aMDP_OSAL_DELAYMS(20);sn65dsi86_write(DP_SPEC_REG_5A, 0x05);//songer temp
}

Kailyn Chen：

您好，您试下下面的配置看是否能够显示color bar？

<aardvark> <configure i2c="1" spi="1" gpio="0" tpower="1" pullups="1"/> <i2c_bitrate khz="100"/> <i2c_write addr="0x2D" count="1" radix="16">5C 01</i2c_write> <sleep ms="10"/>

<i2c_write addr="0x2D" count="1" radix="16">FF 07</i2c_write> <sleep ms="10"/>

======DUMP CFR====== <i2c_write addr="0x2D" count="0" radix="16">16 </i2c_write> <sleep ms="10"/>

======Read====== <i2c_read addr="0x2D" count="1" radix="16">00</i2c_read> <sleep ms="10"/>

<i2c_write addr="0x2D" count="1" radix="16">16 01</i2c_write> <sleep ms="10"/>

<i2c_write addr="0x2D" count="0" radix="16">16 </i2c_write> <sleep ms="10"/>

======Read====== <i2c_read addr="0x2D" count="2" radix="16">00</i2c_read> <sleep ms="10"/>

<i2c_write addr="0x2D" count="1" radix="16">FF 00</i2c_write> <sleep ms="10"/>

======Single 4 DSI lanes======

<i2c_write addr="0x2D" count="1" radix="16">10 26 </i2c_write> <sleep ms="10"/>

======DSI CLK FREQ======

<i2c_write addr="0x2D" count="0" radix="16">12 </i2c_write> <sleep ms="10"/> <i2c_read addr="0x2D" count="2" radix="16">00</i2c_read> <sleep ms="10"/>

======enhanced framing======

<i2c_write addr="0x2D" count="1" radix="16">5A 04 </i2c_write> <sleep ms="10"/>

======ADDR 0x93 CFR======

<i2c_write addr="0x2D" count="0" radix="16">93</i2c_write> <sleep ms="10"/>

======Read====== <i2c_read addr="0x2D" count="6" radix="16">00</i2c_read> <sleep ms="10"/>

======Pre0dB 1 lanes no SSC====== <i2c_write addr="0x2D" count="1" radix="16">93 10</i2c_write> <sleep ms="10"/>

======L0mV RBR====== <i2c_write addr="0x2D" count="1" radix="16">94 80</i2c_write> <sleep ms="10"/>

======POST2 0dB ====== <i2c_write addr="0x2D" count="1" radix="16">95 00</i2c_write> <sleep ms="10"/>

======PLL ENABLE====== <i2c_write addr="0x2D" count="1" radix="16">0D 01</i2c_write> <sleep ms="10"/> <i2c_write addr="0x2D" count="0" radix="16">0A</i2c_write> <sleep ms="10"/> <i2c_read addr="0x2D" count="2" radix="16">00</i2c_read> <sleep ms="10"/>

======Semi-Auto TRAIN ====== <i2c_write addr="0x2D" count="1" radix="16">96 0A</i2c_write> <sleep ms="20"/>

======ADDR 0x0A CFR======

<i2c_write addr="0x2D" count="0" radix="16">96</i2c_write> <sleep ms="20"/>

======Read====== <i2c_read addr="0x2D" count="1" radix="16">00</i2c_read> <sleep ms="10"/>

=====CHA_ACTIVE_LINE_LENGTH======= <i2c_write addr="0x2D" count="2" radix="16">20 00 04</i2c_write> <sleep ms="10"/>

=====CHA_VERTICAL_DISPLAY_SIZE======= <i2c_write addr="0x2D" count="2" radix="16">24 58 02</i2c_write> <sleep ms="10"/>

=====CHA_SYNC_DELAY======= <i2c_write addr="0x2D" count="2" radix="16">28 00 00</i2c_write> <sleep ms="10"/>

=====CHA_HSYNC_PULSE_WIDTH======= <i2c_write addr="0x2D" count="2" radix="16">2C 80 80</i2c_write> <sleep ms="10"/>

=====CHA_VSYNC_PULSE_WIDTH======= <i2c_write addr="0x2D" count="2" radix="16">30 04 80</i2c_write> <sleep ms="10"/>

=====CHA_HORIZONTAL_BACK_PORCH======= <i2c_write addr="0x2D" count="1" radix="16">34 28 </i2c_write> <sleep ms="10"/>

=====CHA_VERTICAL_BACK_PORCH======= <i2c_write addr="0x2D" count="1" radix="16">36 09</i2c_write> <sleep ms="10"/>

=====CHA_HORIZONTAL_FRONT_PORCH======= <i2c_write addr="0x2D" count="1" radix="16">38 28</i2c_write> <sleep ms="10"/>

=====CHA_VERTICAL_FRONT_PORCH======= <i2c_write addr="0x2D" count="1" radix="16">3A 01</i2c_write> <sleep ms="10"/>

=====DP_18BPP_EN ======= <i2c_write addr="0x2D" count="1" radix="16">5B 01 </i2c_write> <sleep ms="100"/>

=====COLOR BAR ======= <i2c_write addr="0x2D" count="1" radix="16">3C 10</i2c_write> <sleep ms="100"/>

======enhanced framing and Vstream enable======

<i2c_write addr="0x2D" count="1" radix="16">5A 0C </i2c_write> <sleep ms="100"/>

======DUMP CFR====== <i2c_write addr="0x2D" count="0" radix="16">20</i2c_write> <sleep ms="10"/>

======Read====== <i2c_read addr="0x2D" count="32" radix="16">00</i2c_read> <sleep ms="10"/>

</aardvark>