DSI display

Robotics & Edge Computing Jetson Systems Jetson TK1
21

Use xrandr to see if the DSI display is registered in the kernel.

In my case I get this:

# export DISPLAY=:0
# xrandr
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 16384 x 16384
DSI-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1920x1080     59.97*+
HDMI-0 disconnected (normal left inverted right x axis y axis)

To enable DSI-0 and disable HDMI-0

xrandr --output DSI-0 --mode 1920x1080 --primary --output HDMI-0 --off

Dual monitor

xrandr --output DSI-0 --mode 1920x1080 --primary --output HDMI-0 --mode 1920x1080 --right-of DSI-0

Have a look at the xrandr and also you may have to do a few changes in your xorg.conf.

22

Hi dimtass,
I show this information

ubuntu@tegra-ubuntu:~$ xrandr
Screen 0: minimum 8 x 8, current 720 x 576, maximum 16384 x 16384
DSI-0 connected (normal left inverted right x axis y axis)
   720x576       50.00 +
HDMI-0 connected primary 720x576+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   720x576       50.00*+

When I dual screen display or only DSI display, the output is black.why?
How to configure this place？

nvidia,dsi-init-cmd =
	/* Long  Packet: <PACKETTYPE[u8] COMMANDID[u8] PAYLOADCOUNT[u16] ECC[u8] PAYLOAD[..] CHECKSUM[u16]> */
	/* Short Packet: <PACKETTYPE[u8] COMMANDID[u8] DATA0[u8] DATA1[u8] ECC[u8]> */
	/* For DSI packets each DT cell is interpreted as u8 not u32 */

	<TEGRA_DSI_PACKET_CMD DSI_GENERIC_LONG_WRITE 0x3 0x0 0x0 0x10 0x00 0x2A 0x0 0x0>,
	<TEGRA_DSI_DELAY_MS 20>,
	<TEGRA_DSI_PACKET_CMD DSI_DCS_WRITE_0_PARAM DSI_DCS_NO_OP 0x0 0x0>,
	<TEGRA_DSI_DELAY_MS 20>,
	<TEGRA_DSI_PACKET_CMD DSI_GENERIC_LONG_WRITE 0x3 0x0 0x0 0x10 0x01 0x01 0x0 0x0>,
	<TEGRA_DSI_DELAY_MS 20>,
	<TEGRA_DSI_PACKET_CMD DSI_DCS_WRITE_0_PARAM DSI_DCS_NO_OP 0x0 0x0>,
	<TEGRA_DSI_DELAY_MS 20>,
	<TEGRA_DSI_PACKET_CMD DSI_DCS_WRITE_0_PARAM DSI_DCS_SET_TEARING_EFFECT_ON 0x0 0x0>,
	<TEGRA_DSI_DELAY_MS 20>,
	<TEGRA_DSI_PACKET_CMD DSI_DCS_WRITE_0_PARAM DSI_DCS_EXIT_SLEEP_MODE 0x0 0x0>,
	<TEGRA_DSI_DELAY_MS 120>,
	<TEGRA_DSI_PACKET_CMD DSI_DCS_WRITE_0_PARAM DSI_DCS_SET_DISPLAY_ON 0x0 0x0>,
	<TEGRA_DSI_DELAY_MS 20>;
	nvidia,dsi-n-init-cmd = <14>;
		nvidia,dsi-suspend-cmd =
	<TEGRA_DSI_PACKET_CMD DSI_DCS_WRITE_0_PARAM DSI_DCS_SET_DISPLAY_OFF 0x0 0x0>,
	<TEGRA_DSI_DELAY_MS 50>,
	<TEGRA_DSI_PACKET_CMD DSI_DCS_WRITE_0_PARAM DSI_DCS_ENTER_SLEEP_MODE 0x0 0x0>,
	<TEGRA_DSI_DELAY_MS 200>,
	<TEGRA_DSI_PACKET_CMD DSI_DCS_WRITE_0_PARAM DSI_DCS_SET_TEARING_EFFECT_OFF 0x0 0x0>,
	<TEGRA_DSI_DELAY_MS 20>;
	nvidia,dsi-n-suspend-cmd = <6>;

This is the print message. How to modify dsi clk. parent:81000000 will lead to errors " dsi: Tlpx mipi range violated" and “dsi: mipi range violated”

[    2.132166] tegradc tegradc.0: DSI: HS clock rate is 81000
[    2.139054] tegradc tegradc.0: nominal-pclk:27000000 parent:27000000 div:1.0 pclk:27000000 26730000~29430000
[    2.211637] tegra_mipi_cal 700e3000.mipical: Mipi cal timeout,val:40013980, lanes:c0000000
[    2.217910] tegra_mipi_cal 700e3000.mipical: MIPI_CAL_CTRL                  0x00 0x2a000000
[    2.226255] tegra_mipi_cal 700e3000.mipical: CIL_MIPI_CAL_STATUS            0x08 0x40013980
[    2.234557] tegra_mipi_cal 700e3000.mipical: CIL_MIPI_CAL_STATUS_2          0x0c 0x00000020
[    2.242888] tegra_mipi_cal 700e3000.mipical: CILA_MIPI_CAL_CONFIG           0x14 0x00000000
[    2.251185] tegra_mipi_cal 700e3000.mipical: CILB_MIPI_CAL_CONFIG           0x18 0x00000000
[    2.259515] tegra_mipi_cal 700e3000.mipical: CILC_MIPI_CAL_CONFIG           0x1c 0x00000000
[    2.267847] tegra_mipi_cal 700e3000.mipical: CILD_MIPI_CAL_CONFIG           0x20 0x00000000
[    2.276156] tegra_mipi_cal 700e3000.mipical: CILE_MIPI_CAL_CONFIG           0x24 0x00000000
[    2.284495] tegra_mipi_cal 700e3000.mipical: CILF_MIPI_CAL_CONFIG           0x28 0x00000000
[    2.292796] tegra_mipi_cal 700e3000.mipical: DSIA_MIPI_CAL_CONFIG           0x38 0x00000000
[    2.301105] tegra_mipi_cal 700e3000.mipical: DSIB_MIPI_CAL_CONFIG           0x3c 0x00000000
[    2.309448] tegra_mipi_cal 700e3000.mipical: DSIC_MIPI_CAL_CONFIG           0x40 0x00200200
[    2.317756] tegra_mipi_cal 700e3000.mipical: DSID_MIPI_CAL_CONFIG           0x44 0x00000200
[    2.326088] tegra_mipi_cal 700e3000.mipical: MIPI_BIAS_PAD_CFG0             0x58 0x00000000
[    2.334396] tegra_mipi_cal 700e3000.mipical: MIPI_BIAS_PAD_CFG1             0x5c 0x00000300
[    2.342728] tegra_mipi_cal 700e3000.mipical: MIPI_BIAS_PAD_CFG2             0x60 0x00010010
[    2.351024] tegra_mipi_cal 700e3000.mipical: DSIA_MIPI_CAL_CONFIG_2         0x64 0x00000000
[    2.359354] tegra_mipi_cal 700e3000.mipical: DSIB_MIPI_CAL_CONFIG_2         0x68 0x00000000
[    2.367687] tegra_mipi_cal 700e3000.mipical: DSIC_MIPI_CAL_CONFIG_2         0x70 0x00200002
[    2.375998] tegra_mipi_cal 700e3000.mipical: DSID_MIPI_CAL_CONFIG_2         0x74 0x00000002
[    2.978376] tegradc tegradc.0: dsi: Tlpx mipi range violated
[    2.982053] tegradc tegradc.0: dsi: mipi range violated
[    2.987359] tegradc tegradc.0: probed
[    3.071335] tegradc tegradc.0: nominal-pclk:27000000 parent:81000000 div:3.0 pclk:27000000 26730000~29430000