Bureaucrats, dave_user, Administrators
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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:#73B2C7; padding:5px; color:white"|Version
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Issue Date
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Notes
|-
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|1.0.0
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|Oct 2020
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|First DESK release
|-
|-
|}
<section end=History/>
<section begin=Body/>
==Peripheral LVDS ==
=== Device tree configuration ===
Here below an example of device tree configuration used on standard DAVE's kit for the AXELLite SOM:
From the ''carrier board device tree'' where two LVDS channel have been configured for a dual LVDS panel (1280x800 24bit and 800x480 18bit):
<pre>
&ldb {
status = "okay";
lvds-channel@0 {
fsl,data-mapping = "spwg";
fsl,data-width = <24>;
crtc = "ipu1-di0";
status = "okay";
primary;
display-timings {
native-mode = <&timing0>;
timing0: AM-1280800NJTZQW-T12H {
clock-frequency = <71100000>;
hactive = <1280>;
vactive = <800>;
hback-porch = <80>;
hfront-porch = <80>;
vback-porch = <15>;
vfront-porch = <15>;
hsync-len = <10>;
vsync-len = <10>;
};
};
};
lvds-channel@1 {
fsl,data-mapping = "spwg";
fsl,data-width = <18>;
crtc = "ipu1-di1";
status = "okay";
display-timings {
native-mode = <&timing1>;
timing1: AM800480STMQW_TA1 {
clock-frequency = <33260000>;
hactive = <800>;
vactive = <480>;
hback-porch = <128>;
hfront-porch = <128>;
vback-porch = <15>;
vfront-porch = <30>;
hsync-len = <10>;
vsync-len = <2>;
};
};
};
};
</pre>
From <code>imx6qdl-axelcommon.dtsi</code>:
<pre>
&iomuxc {
...
...
ipu1 {
pinctrl_ipu1_1: ipu1grp-1 {
fsl,pins = <
MX6QDL_PAD_DI0_DISP_CLK__IPU1_DI0_DISP_CLK 0x10
MX6QDL_PAD_DI0_PIN15__IPU1_DI0_PIN15 0x10
MX6QDL_PAD_DI0_PIN2__IPU1_DI0_PIN02 0x10
MX6QDL_PAD_DI0_PIN3__IPU1_DI0_PIN03 0x10
MX6QDL_PAD_DI0_PIN4__IPU1_DI0_PIN04 0x80000000
MX6QDL_PAD_DISP0_DAT0__IPU1_DISP0_DATA00 0x10
MX6QDL_PAD_DISP0_DAT1__IPU1_DISP0_DATA01 0x10
MX6QDL_PAD_DISP0_DAT2__IPU1_DISP0_DATA02 0x10
MX6QDL_PAD_DISP0_DAT3__IPU1_DISP0_DATA03 0x10
MX6QDL_PAD_DISP0_DAT4__IPU1_DISP0_DATA04 0x10
MX6QDL_PAD_DISP0_DAT5__IPU1_DISP0_DATA05 0x10
MX6QDL_PAD_DISP0_DAT6__IPU1_DISP0_DATA06 0x10
MX6QDL_PAD_DISP0_DAT7__IPU1_DISP0_DATA07 0x10
MX6QDL_PAD_DISP0_DAT8__IPU1_DISP0_DATA08 0x10
MX6QDL_PAD_DISP0_DAT9__IPU1_DISP0_DATA09 0x10
MX6QDL_PAD_DISP0_DAT10__IPU1_DISP0_DATA10 0x10
MX6QDL_PAD_DISP0_DAT11__IPU1_DISP0_DATA11 0x10
MX6QDL_PAD_DISP0_DAT12__IPU1_DISP0_DATA12 0x10
MX6QDL_PAD_DISP0_DAT13__IPU1_DISP0_DATA13 0x10
MX6QDL_PAD_DISP0_DAT14__IPU1_DISP0_DATA14 0x10
MX6QDL_PAD_DISP0_DAT15__IPU1_DISP0_DATA15 0x10
MX6QDL_PAD_DISP0_DAT16__IPU1_DISP0_DATA16 0x10
MX6QDL_PAD_DISP0_DAT17__IPU1_DISP0_DATA17 0x10
MX6QDL_PAD_DISP0_DAT18__IPU1_DISP0_DATA18 0x10
MX6QDL_PAD_DISP0_DAT19__IPU1_DISP0_DATA19 0x10
MX6QDL_PAD_DISP0_DAT20__IPU1_DISP0_DATA20 0x10
MX6QDL_PAD_DISP0_DAT21__IPU1_DISP0_DATA21 0x10
MX6QDL_PAD_DISP0_DAT22__IPU1_DISP0_DATA22 0x10
MX6QDL_PAD_DISP0_DAT23__IPU1_DISP0_DATA23 0x10
>;
};
};
...
...
};
</pre>
===Accessing the peripheral===
For enabling the two devices, it is required to instantiate both framebuffers with the related configuration, for example into the carrier device tree:
<pre>
mxcfb1: fb@0 {
memory-region = <&display_reserved>;
compatible = "fsl,mxc_sdc_fb";
disp_dev = "ldb";
interface_pix_fmt = "RGB24";
default_bpp = <32>;
int_clk = <0>;
late_init = <0>;
status = "okay";
};
mxcfb2: fb@1 {
compatible = "fsl,mxc_sdc_fb";
disp_dev = "ldb";
interface_pix_fmt = "RGB666";
default_bpp = <16>;
int_clk = <0>;
late_init = <0>;
status = "okay";
};
</pre>
====Linux messages at boot time====
<pre class="workstation-terminal">
...
...
[ 2.367160] mxc_sdc_fb fb@0: registered mxc display driver ldb
[ 2.373048] mxc_sdc_fb fb@0: using reserved memory region at 0x4e000000, size 8 MiB
[ 2.380752] mxc_sdc_fb fb@0: assigned reserved memory node splashscreen
[ 2.387399] mxc_sdc_fb fb@0: using memory region 0x4e000000 0x4e7fffff
...
...
</pre>
=== Additional information ===
LDB framebuffer can be accessed through the standard <code>/dev/fbX</code> ''fb'' device.
The configured framebuffer can be checked using standard <code>fbset</code> utility:
<pre class="workstation-terminal">
root@imx6qxelk:~# fbset -fb /dev/fb0
mode "1280x800-58"
# D: 71.104 MHz, H: 49.037 kHz, V: 58.377 Hz
geometry 1280 800 1280 800 32
timings 14064 80 80 15 15 10 10
rgba 8/16,8/8,8/0,8/24
endmode
root@imx6qxelk:~#
</pre>
----
[[Category:AXEL Lite]]
{| 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:#73B2C7; padding:5px; color:white"|Version
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Issue Date
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Notes
|-
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|1.0.0
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|Oct 2020
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|First DESK release
|-
|-
|}
<section end=History/>
<section begin=Body/>
==Peripheral LVDS ==
=== Device tree configuration ===
Here below an example of device tree configuration used on standard DAVE's kit for the AXELLite SOM:
From the ''carrier board device tree'' where two LVDS channel have been configured for a dual LVDS panel (1280x800 24bit and 800x480 18bit):
<pre>
&ldb {
status = "okay";
lvds-channel@0 {
fsl,data-mapping = "spwg";
fsl,data-width = <24>;
crtc = "ipu1-di0";
status = "okay";
primary;
display-timings {
native-mode = <&timing0>;
timing0: AM-1280800NJTZQW-T12H {
clock-frequency = <71100000>;
hactive = <1280>;
vactive = <800>;
hback-porch = <80>;
hfront-porch = <80>;
vback-porch = <15>;
vfront-porch = <15>;
hsync-len = <10>;
vsync-len = <10>;
};
};
};
lvds-channel@1 {
fsl,data-mapping = "spwg";
fsl,data-width = <18>;
crtc = "ipu1-di1";
status = "okay";
display-timings {
native-mode = <&timing1>;
timing1: AM800480STMQW_TA1 {
clock-frequency = <33260000>;
hactive = <800>;
vactive = <480>;
hback-porch = <128>;
hfront-porch = <128>;
vback-porch = <15>;
vfront-porch = <30>;
hsync-len = <10>;
vsync-len = <2>;
};
};
};
};
</pre>
From <code>imx6qdl-axelcommon.dtsi</code>:
<pre>
&iomuxc {
...
...
ipu1 {
pinctrl_ipu1_1: ipu1grp-1 {
fsl,pins = <
MX6QDL_PAD_DI0_DISP_CLK__IPU1_DI0_DISP_CLK 0x10
MX6QDL_PAD_DI0_PIN15__IPU1_DI0_PIN15 0x10
MX6QDL_PAD_DI0_PIN2__IPU1_DI0_PIN02 0x10
MX6QDL_PAD_DI0_PIN3__IPU1_DI0_PIN03 0x10
MX6QDL_PAD_DI0_PIN4__IPU1_DI0_PIN04 0x80000000
MX6QDL_PAD_DISP0_DAT0__IPU1_DISP0_DATA00 0x10
MX6QDL_PAD_DISP0_DAT1__IPU1_DISP0_DATA01 0x10
MX6QDL_PAD_DISP0_DAT2__IPU1_DISP0_DATA02 0x10
MX6QDL_PAD_DISP0_DAT3__IPU1_DISP0_DATA03 0x10
MX6QDL_PAD_DISP0_DAT4__IPU1_DISP0_DATA04 0x10
MX6QDL_PAD_DISP0_DAT5__IPU1_DISP0_DATA05 0x10
MX6QDL_PAD_DISP0_DAT6__IPU1_DISP0_DATA06 0x10
MX6QDL_PAD_DISP0_DAT7__IPU1_DISP0_DATA07 0x10
MX6QDL_PAD_DISP0_DAT8__IPU1_DISP0_DATA08 0x10
MX6QDL_PAD_DISP0_DAT9__IPU1_DISP0_DATA09 0x10
MX6QDL_PAD_DISP0_DAT10__IPU1_DISP0_DATA10 0x10
MX6QDL_PAD_DISP0_DAT11__IPU1_DISP0_DATA11 0x10
MX6QDL_PAD_DISP0_DAT12__IPU1_DISP0_DATA12 0x10
MX6QDL_PAD_DISP0_DAT13__IPU1_DISP0_DATA13 0x10
MX6QDL_PAD_DISP0_DAT14__IPU1_DISP0_DATA14 0x10
MX6QDL_PAD_DISP0_DAT15__IPU1_DISP0_DATA15 0x10
MX6QDL_PAD_DISP0_DAT16__IPU1_DISP0_DATA16 0x10
MX6QDL_PAD_DISP0_DAT17__IPU1_DISP0_DATA17 0x10
MX6QDL_PAD_DISP0_DAT18__IPU1_DISP0_DATA18 0x10
MX6QDL_PAD_DISP0_DAT19__IPU1_DISP0_DATA19 0x10
MX6QDL_PAD_DISP0_DAT20__IPU1_DISP0_DATA20 0x10
MX6QDL_PAD_DISP0_DAT21__IPU1_DISP0_DATA21 0x10
MX6QDL_PAD_DISP0_DAT22__IPU1_DISP0_DATA22 0x10
MX6QDL_PAD_DISP0_DAT23__IPU1_DISP0_DATA23 0x10
>;
};
};
...
...
};
</pre>
===Accessing the peripheral===
For enabling the two devices, it is required to instantiate both framebuffers with the related configuration, for example into the carrier device tree:
<pre>
mxcfb1: fb@0 {
memory-region = <&display_reserved>;
compatible = "fsl,mxc_sdc_fb";
disp_dev = "ldb";
interface_pix_fmt = "RGB24";
default_bpp = <32>;
int_clk = <0>;
late_init = <0>;
status = "okay";
};
mxcfb2: fb@1 {
compatible = "fsl,mxc_sdc_fb";
disp_dev = "ldb";
interface_pix_fmt = "RGB666";
default_bpp = <16>;
int_clk = <0>;
late_init = <0>;
status = "okay";
};
</pre>
====Linux messages at boot time====
<pre class="workstation-terminal">
...
...
[ 2.367160] mxc_sdc_fb fb@0: registered mxc display driver ldb
[ 2.373048] mxc_sdc_fb fb@0: using reserved memory region at 0x4e000000, size 8 MiB
[ 2.380752] mxc_sdc_fb fb@0: assigned reserved memory node splashscreen
[ 2.387399] mxc_sdc_fb fb@0: using memory region 0x4e000000 0x4e7fffff
...
...
</pre>
=== Additional information ===
LDB framebuffer can be accessed through the standard <code>/dev/fbX</code> ''fb'' device.
The configured framebuffer can be checked using standard <code>fbset</code> utility:
<pre class="workstation-terminal">
root@imx6qxelk:~# fbset -fb /dev/fb0
mode "1280x800-58"
# D: 71.104 MHz, H: 49.037 kHz, V: 58.377 Hz
geometry 1280 800 1280 800 32
timings 14064 80 80 15 15 10 10
rgba 8/16,8/8,8/0,8/24
endmode
root@imx6qxelk:~#
</pre>
----
[[Category:AXEL Lite]]
