Waveshare AMOLED

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==Green LED==

When the device is powered up, a green LED will blink if it is not receiving an HDMI signal. The manual only mentions that this can happen due to power supply issues, but that is incorrect (power supply issues <i>can</i> cause this symptom, but it can also simply be due to missing/bad HDMI input).

==Raspbian==

Add to <tt>config.txt</tt>:

<pre>

max_framebuffer_height=1920

config_hdmi_boost=10

hdmi_group=2

hdmi_force_hotplug=1

hdmi_mode=87

hdmi_timings=1080 1 26 4 50 1920 1 8 2 6 0 0 0 60 0 135580000 3

</pre>

When using the [[Potato|Libre Potato]], the <tt>meson_dw_hdmi</tt> module must be blacklisted, or you'll get a black screen. This can probably be worked around, but I don't yet know how. Using the "fbdev" driver, you'll need a <tt>Rotate</tt> directive in <tt>xorg.conf</tt> to rotate the AML-S905X-CC Meson's Mali GPU (<tt>xrandr</tt> is not supported).

==Console rotation==

Write 1 to <tt>/sys/class/graphics/fbcon/rotate</tt>. To do it from the kernel, add <tt>fbcon=rotate:1</tt> to the kernel command line; in Raspbian, this is done by editing <tt>/boot/cmdline.txt</tt>. This has no effect on Xorg.

Write 1 to <tt>/sys/class/graphics/fbcon/rotate</tt>. To do it from the kernel, add <tt>fbcon=rotate:1</tt> to the kernel command line; in Raspbian, this is done by editing <tt>/boot/firmware/cmdline.txt</tt>. This has no effect on Xorg.

==Touch rotation==

We can do it through Xorg: add the appropriate <tt>CalibrationMatrix</tt> to the <tt>touchscreen</tt> libevent stanza. For instance, rotate 90 degrees clockwise with <tt>Option "CalibrationMatrix" "0 1 0 -1 0 1 0 0 1"</tt>. But this will only work for X.

If we want to handle all libinput consumers (particularly [[Wayland]]), it's better to make a [[udev]] rule that sets <tt>

ENV{LIBINPUT_CALIBRATION_MATRIX}="0 1 0 -1 0 1</tt>. You can test this by checking <tt>libinput list-devices | grep ^Calibration:</tt>.

==Assembling front pane==

Line 23:

Line 42:

* LED long leg to 330Ω resistor

* Resistor to GPIO pin 12

==Setup for [[Counterforce]]==

* We want automatic login to X. Potato uses [http://www.lxde.org/ LXDE] by default.

** <tt>$HOME/.config/lxsession/LXDE/autostart</tt> of the logged in user defines the Xsession.

** Be sure to launch <tt>xscreensaver -no-splash</tt> to avoid AMOLED burnin

Waveshare AMOLED: Difference between revisions

Dank (talk | contribs)

@@ Line 5: / Line 5: @@
 ==Green LED==
 When the device is powered up, a green LED will blink if it is not receiving an HDMI signal. The manual only mentions that this can happen due to power supply issues, but that is incorrect (power supply issues <i>can</i> cause this symptom, but it can also simply be due to missing/bad HDMI input).
+==Raspbian==
+Add to <tt>config.txt</tt>:
+<pre>
+max_framebuffer_height=1920
+config_hdmi_boost=10
+hdmi_group=2
+hdmi_force_hotplug=1
+hdmi_mode=87
+hdmi_timings=1080 1 26 4 50 1920 1 8 2 6 0 0 0 60 0 135580000 3
+</pre>
+When using the [[Potato|Libre Potato]], the <tt>meson_dw_hdmi</tt> module must be blacklisted, or you'll get a black screen. This can probably be worked around, but I don't yet know how. Using the "fbdev" driver, you'll need a <tt>Rotate</tt> directive in <tt>xorg.conf</tt> to rotate the AML-S905X-CC Meson's Mali GPU (<tt>xrandr</tt> is not supported).
 ==Console rotation==
-Write 1 to <tt>/sys/class/graphics/fbcon/rotate</tt>. To do it from the kernel, add <tt>fbcon=rotate:1</tt> to the kernel command line; in Raspbian, this is done by editing <tt>/boot/cmdline.txt</tt>. This has no effect on Xorg.
+Write 1 to <tt>/sys/class/graphics/fbcon/rotate</tt>. To do it from the kernel, add <tt>fbcon=rotate:1</tt> to the kernel command line; in Raspbian, this is done by editing <tt>/boot/firmware/cmdline.txt</tt>. This has no effect on Xorg.
+==Touch rotation==
+We can do it through Xorg: add the appropriate <tt>CalibrationMatrix</tt> to the <tt>touchscreen</tt> libevent stanza. For instance, rotate 90 degrees clockwise with <tt>Option "CalibrationMatrix" "0 1 0 -1 0 1 0 0 1"</tt>. But this will only work for X.
+If we want to handle all libinput consumers (particularly [[Wayland]]), it's better to make a [[udev]] rule that sets <tt>
+ENV{LIBINPUT_CALIBRATION_MATRIX}="0 1 0 -1 0 1</tt>. You can test this by checking <tt>libinput list-devices | grep ^Calibration:</tt>.
 ==Assembling front pane==
@@ Line 23: / Line 42: @@
 * LED long leg to 330Ω resistor
 * Resistor to GPIO pin 12
+==Setup for [[Counterforce]]==
+* We want automatic login to X. Potato uses [http://www.lxde.org/ LXDE] by default.
+** <tt>$HOME/.config/lxsession/LXDE/autostart</tt> of the logged in user defines the Xsession.
+** Be sure to launch <tt>xscreensaver -no-splash</tt> to avoid AMOLED burnin