dave_user
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Created page with "<section begin=History/> {| style="border-collapse:collapse; " !colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History |- ! style="border-le..."
<section begin=History/>
{| style="border-collapse:collapse; "
!colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History
|-
! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#ededed; padding:5px; color:#000000" |2024/01/30
! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#ededed; padding:5px; color:#000000" |DESK-MX9-L-5.0.0 release
|-
|}
<section end=History/>
<section begin=Body/>
== Peripheral LVDS ==
=== Device tree configuration ===
==== AURA SOM ====
Here below an example of device tree modification on standard DAVE's kit for the AURA SOM:
Example of definition aboud LVDS to HDMI convert from <code>imx93-aura-cb2001.dts</code>
<pre>
...
/ {
...
regulators {
...
reg_lvds_en: regulator_lcd_3V3_en {
compatible = "regulator-fixed";
regulator-name = "lvds_enable";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_lcd_3v3_enable>;
gpio = <&gpio1 10 GPIO_ACTIVE_HIGH>;
enable-active-high;
};
...
};
...
lvds_panel {
compatible = "panel-lvds";
power-supply = <®_lvds_en>;
width-mm = <154>;
height-mm = <87>;
label = "am800480btmqw-tg0h-c";
data-mapping = "vesa-24";
status = "okay";
panel-timing {
clock-frequency = <35000000>;
hactive = <800>;
vactive = <480>;
hback-porch = <88>;
hfront-porch = <40>;
vback-porch = <32>;
vfront-porch = <13>;
hsync-len = <48>;
vsync-len = <3>;
hsync-active = <0>;
vsync-active = <0>;
de-active = <1>;
};
port {
panel_lvds_in: endpoint {
remote-endpoint = <&lvds_out>;
};
};
};
...
};
...
&lcdif {
status = "okay";
assigned-clock-rates = <498000000>, <71142857>, <400000000>, <133333333>;
};
&ldb {
status = "okay";
lvds-channel@0 {
status = "okay";
port@1 {
reg = <1>;
lvds_out: endpoint {
remote-endpoint = <&panel_lvds_in>;
};
};
};
};
&ldb_phy {
status = "okay";
};
...
&iomuxc {
...
pinctrl_lcd_3v3_enable: lcd_3v3_en {
fsl,pins = <
MX93_PAD_PDM_BIT_STREAM1__GPIO1_IO10 0x31e
>;
};
...
};
</pre>
===Accessing the peripheral ===
====Linux messages at boot time====
<pre class="workstation-terminal">
...
[ 0.917991] imx-drm display-subsystem: bound imx-lcdifv3-crtc.0 (ops lcdifv3_crtc_ops)
[ 1.714036] imx-drm display-subsystem: bound imx-lcdifv3-crtc.0 (ops lcdifv3_crtc_ops)
[ 1.927160] imx-drm display-subsystem: bound imx-lcdifv3-crtc.0 (ops lcdifv3_crtc_ops)
[ 1.935332] imx-drm display-subsystem: bound soc@0:ldb@4ac10020 (ops imx93_ldb_ops)
[ 1.943254] [drm] Initialized imx-drm 1.0.0 20120507 for display-subsystem on minor 0
[ 2.003273] imx-drm display-subsystem: [drm] fb0: imx-drmdrmfb frame buffer device
[ 4.634721] systemd[1]: Starting Load Kernel Module drm...
...
</pre>
=== DRM access ===
DRM framework can be accessed using the <code>modetest</code> DRM utility.
<pre class="workstation-terminal">
root@desk-mx93:~# modetest -M imx-drm
Encoders:
id crtc type possible crtcs possible clones
34 33 LVDS 0x00000001 0x00000001
Connectors:
id encoder status name size (mm) modes encoders
35 34 connected LVDS-1 154x87 1 34
modes:
index name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot
#0 800x480 67.92 800 840 888 976 480 493 496 528 35000 flags: nhsync, nvsync; type: preferred, driver
props:
1 EDID:
flags: immutable blob
blobs:
value:
2 DPMS:
flags: enum
enums: On=0 Standby=1 Suspend=2 Off=3
value: 0
5 link-status:
flags: enum
enums: Good=0 Bad=1
value: 0
6 non-desktop:
flags: immutable range
values: 0 1
value: 0
4 TILE:
flags: immutable blob
blobs:
value:
CRTCs:
id fb pos size
33 39 (0,0) (800x480)
#0 800x480 67.92 800 840 888 976 480 493 496 528 35000 flags: nhsync, nvsync; type: preferred, driver
props:
24 VRR_ENABLED:
flags: range
values: 0 1
value: 0
Planes:
id crtc fb CRTC x,y x,y gamma size possible crtcs
31 33 39 0,0 0,0 0 0x00000001
formats: XR24 AR24 RG16 XB24 AB24 AR15 XR15
props:
8 type:
flags: immutable enum
enums: Overlay=0 Primary=1 Cursor=2
value: 1
32 zpos:
flags: immutable range
values: 0 0
value: 0
Frame buffers:
id size pitch
root@desk-mx93:~#
</pre>
=== Additional information ===
For some information on DRM/KMS framework, see the [https://www.kernel.org/doc/html/v6.1/gpu/drm-kms.html DRM-KMS] kernel documentation.
----
[[Category:AURA]]
{| style="border-collapse:collapse; "
!colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History
|-
! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#ededed; padding:5px; color:#000000" |2024/01/30
! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#ededed; padding:5px; color:#000000" |DESK-MX9-L-5.0.0 release
|-
|}
<section end=History/>
<section begin=Body/>
== Peripheral LVDS ==
=== Device tree configuration ===
==== AURA SOM ====
Here below an example of device tree modification on standard DAVE's kit for the AURA SOM:
Example of definition aboud LVDS to HDMI convert from <code>imx93-aura-cb2001.dts</code>
<pre>
...
/ {
...
regulators {
...
reg_lvds_en: regulator_lcd_3V3_en {
compatible = "regulator-fixed";
regulator-name = "lvds_enable";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_lcd_3v3_enable>;
gpio = <&gpio1 10 GPIO_ACTIVE_HIGH>;
enable-active-high;
};
...
};
...
lvds_panel {
compatible = "panel-lvds";
power-supply = <®_lvds_en>;
width-mm = <154>;
height-mm = <87>;
label = "am800480btmqw-tg0h-c";
data-mapping = "vesa-24";
status = "okay";
panel-timing {
clock-frequency = <35000000>;
hactive = <800>;
vactive = <480>;
hback-porch = <88>;
hfront-porch = <40>;
vback-porch = <32>;
vfront-porch = <13>;
hsync-len = <48>;
vsync-len = <3>;
hsync-active = <0>;
vsync-active = <0>;
de-active = <1>;
};
port {
panel_lvds_in: endpoint {
remote-endpoint = <&lvds_out>;
};
};
};
...
};
...
&lcdif {
status = "okay";
assigned-clock-rates = <498000000>, <71142857>, <400000000>, <133333333>;
};
&ldb {
status = "okay";
lvds-channel@0 {
status = "okay";
port@1 {
reg = <1>;
lvds_out: endpoint {
remote-endpoint = <&panel_lvds_in>;
};
};
};
};
&ldb_phy {
status = "okay";
};
...
&iomuxc {
...
pinctrl_lcd_3v3_enable: lcd_3v3_en {
fsl,pins = <
MX93_PAD_PDM_BIT_STREAM1__GPIO1_IO10 0x31e
>;
};
...
};
</pre>
===Accessing the peripheral ===
====Linux messages at boot time====
<pre class="workstation-terminal">
...
[ 0.917991] imx-drm display-subsystem: bound imx-lcdifv3-crtc.0 (ops lcdifv3_crtc_ops)
[ 1.714036] imx-drm display-subsystem: bound imx-lcdifv3-crtc.0 (ops lcdifv3_crtc_ops)
[ 1.927160] imx-drm display-subsystem: bound imx-lcdifv3-crtc.0 (ops lcdifv3_crtc_ops)
[ 1.935332] imx-drm display-subsystem: bound soc@0:ldb@4ac10020 (ops imx93_ldb_ops)
[ 1.943254] [drm] Initialized imx-drm 1.0.0 20120507 for display-subsystem on minor 0
[ 2.003273] imx-drm display-subsystem: [drm] fb0: imx-drmdrmfb frame buffer device
[ 4.634721] systemd[1]: Starting Load Kernel Module drm...
...
</pre>
=== DRM access ===
DRM framework can be accessed using the <code>modetest</code> DRM utility.
<pre class="workstation-terminal">
root@desk-mx93:~# modetest -M imx-drm
Encoders:
id crtc type possible crtcs possible clones
34 33 LVDS 0x00000001 0x00000001
Connectors:
id encoder status name size (mm) modes encoders
35 34 connected LVDS-1 154x87 1 34
modes:
index name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot
#0 800x480 67.92 800 840 888 976 480 493 496 528 35000 flags: nhsync, nvsync; type: preferred, driver
props:
1 EDID:
flags: immutable blob
blobs:
value:
2 DPMS:
flags: enum
enums: On=0 Standby=1 Suspend=2 Off=3
value: 0
5 link-status:
flags: enum
enums: Good=0 Bad=1
value: 0
6 non-desktop:
flags: immutable range
values: 0 1
value: 0
4 TILE:
flags: immutable blob
blobs:
value:
CRTCs:
id fb pos size
33 39 (0,0) (800x480)
#0 800x480 67.92 800 840 888 976 480 493 496 528 35000 flags: nhsync, nvsync; type: preferred, driver
props:
24 VRR_ENABLED:
flags: range
values: 0 1
value: 0
Planes:
id crtc fb CRTC x,y x,y gamma size possible crtcs
31 33 39 0,0 0,0 0 0x00000001
formats: XR24 AR24 RG16 XB24 AB24 AR15 XR15
props:
8 type:
flags: immutable enum
enums: Overlay=0 Primary=1 Cursor=2
value: 1
32 zpos:
flags: immutable range
values: 0 0
value: 0
Frame buffers:
id size pitch
root@desk-mx93:~#
</pre>
=== Additional information ===
For some information on DRM/KMS framework, see the [https://www.kernel.org/doc/html/v6.1/gpu/drm-kms.html DRM-KMS] kernel documentation.
----
[[Category:AURA]]
