MIPI-DSI - Revision history

Jacob at 07:37, 11 October 2017

2017-10-11T07:37:30Z

Jacob at 02:48, 11 October 2017

2017-10-11T02:48:38Z

Jacob at 02:48, 11 October 2017

2017-10-11T02:48:25Z

Jacob: Created page with " === * How to Enable MIPI Module === ---- '''1. Driver Compile'''
Ensure below configures have been selected:

CONFIG_ROCKCHIP_DW_MIPI_DSI=y

Be..."

2017-10-11T02:32:02Z

Created page with " === * How to Enable MIPI Module === ---- '''1. Driver Compile'''<br/> Ensure below configures have been selected: <pre><code>CONFIG_ROCKCHIP_DW_MIPI_DSI=y</code> </pre> Be..."

New page

=== * How to Enable MIPI Module ===

----

'''1. Driver Compile'''<br/> Ensure below configures have been selected:
<pre><code>CONFIG_ROCKCHIP_DW_MIPI_DSI=y</code>
</pre>

Bellow drivers have been compiled:
<pre><code>drivers/gpu/drm/rockchip/dw-mipi-dsi.c</code>
</pre>

'''2. DTS Setting'''<br/> 2.1 Enable MIPI Device Node：

*Include the SoC DTS 'rk3288.dtsi' file.
*Set the MIPI device node state to 'okay'.
<pre><code>include "rk3288.dtsi"
&mipi_dsi {
status = "okay";
};</code>
</pre>

2.2 MIPI device node parameters, there're only one property for MIPI device:
<pre><code>&mipi_dsi {
panel {
compatible ="boe,tv080wum-nl0";
reg = <0>;
backlight = <&backlight>;
enable-gpios = <&gpio1 13 GPIO_ACTIVE_HIGH>;
status = "okay";
};
};</code>
</pre>

*"panel": Define the right panel device node.

----

=== * How To Debug MIPI Module ===

'''3. Whether MIPI display card has been registered successfully'''

If the MIPI display card has been created, it would create a sysfs debug directory.
<pre><code>$ ls /sys/class/drm/card0-DSI-1</code>
</pre>

So you just need to check that directory. If that directory is missing in your machine board, please check:

*Whether MIPI have been enabled in DTS files.
*Whether MIPI panel have been registered successfully.
*Whether you have available VOP module for MIPI.
*Check the kernel log for more detail (dmesg | grep mipi)

'''4. Check MIPI display card status: status, enabled, modes'''
<pre><code>$ cd /sys/class/drm/card0-DSI-1
$ cat status # should printed "connected" or "disconnected"
$ cat enabled # should printed "enabled" or "disabled"
$ cat modes # should printed the available mode list, like 1536x2048</code>
</pre>

'''5. If you still have no picture on MIPI panel, please check bellow information:'''

*Check the MIPI panel power supply.
*Check the panel datasheet, ensure you have configured the timing and power sequence rightly.
*Check the hardware connected status, or test the panel on workable board.

----

=== * Reference MIPI DTS Configure： ===
<pre><code>include "rk3288.dtsi"

&mipi_dsi {
status = "okay";
panel {
compatible ="boe,tv080wum-nl0";
reg = <0>;
backlight = <&backlight>;
enable-gpios = <&gpio1 13 GPIO_ACTIVE_HIGH>;
status = "okay";
};
};</code></pre>

@@ Line 13: / Line 13: @@
 If the MIPI display card has been created, it would create a sysfs debug directory.
-<pre><code>$ ls /sys/class/drm/card0-DSI-1</code>
+<pre>$ ls /sys/class/drm/card0-DSI-1</code>
 </pre>
@@ Line 24: / Line 24: @@
 == Check MIPI display card status: status, enabled, modes ==
-<pre><code>$ cd /sys/class/drm/card0-DSI-1
+<pre>$ cd /sys/class/drm/card0-DSI-1
 $ cat status  # should printed "connected" or "disconnected"
 $ cat enabled # should printed "enabled" or "disabled"
-$ cat modes   # should printed the available mode list, like 1536x2048</code>
+$ cat modes   # should printed the available mode list, like 1536x2048
 </pre>

@@ Line 34: / Line 34: @@
 *Check the MIPI panel power supply.
 *Check the panel datasheet, ensure you have configured the timing and power sequence rightly.
 *Check the hardware connected status, or test the panel on workable board.

@@ Line 1: / Line 1: @@
-=== * How to Enable MIPI Module ===
+= References =
-----
+[https://github.com/rockchip-linux/kernel/tree/release-4.4/drivers/gpu/drm/rockchip source code]
-'''1. Driver Compile'''<br/> Ensure below configures have been selected:
+[https://github.com/rockchip-linux/kernel/blob/release-4.4/Documentation/devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt device-tree document]
-'''2. DTS Setting'''<br/> 2.1 Enable MIPI Device Node：
+&nbsp;
-*Include the SoC DTS 'rk3288.dtsi' file.
+= Tips =
-.2 MIPI device node parameters, there're only one property for MIPI device:
+== Whether MIPI display card has been registered successfully ==
 If the MIPI display card has been created, it would create a sysfs debug directory.
@@ Line 53: / Line 23: @@
 *Check the kernel log for more detail (dmesg | grep mipi)
-'''4. Check MIPI display card status: status, enabled, modes'''
+== Check MIPI display card status: status, enabled, modes ==
 <pre><code>$ cd /sys/class/drm/card0-DSI-1
 $ cat status  # should printed "connected" or "disconnected"
@@ Line 60: / Line 30: @@
 </pre>
-'''5. If you still have no picture on MIPI panel, please check bellow information:'''
+== If you still have no picture on MIPI panel, please check bellow information: ==
 *Check the MIPI panel power supply.
@@ Line 66: / Line 36: @@
 *Check the hardware connected status, or test the panel on workable board.
-----
+=== &nbsp; ===

MIPI-DSI - Revision history

Jacob at 07:37, 11 October 2017

Jacob at 02:48, 11 October 2017

Jacob at 02:48, 11 October 2017

Jacob: Created page with " === * How to Enable MIPI Module === ---- '''1. Driver Compile''' Ensure below configures have been selected: CONFIG_ROCKCHIP_DW_MIPI_DSI=y Be..."

Jacob: Created page with " === * How to Enable MIPI Module === ---- '''1. Driver Compile'''
Ensure below configures have been selected:
`CONFIG_ROCKCHIP_DW_MIPI_DSI=y`
Be..."