doc: samples: display: update documentation

- fixes sample codes' relative paths
- updates instructions to build and run for native posix
platforms on its 64 flavor.

Signed-off-by: Glauber Maroto Ferreira <glauber.ferreira@espressif.com>

samples/subsys/display/cfb/README.rst

@@ -21,7 +21,7 @@ Building and Running
 Build this sample application with the following commands:
 
 .. zephyr-app-commands::
-   :zephyr-app: samples/display/cfb
+   :zephyr-app: samples/subsys/display/cfb
    :board: reel_board
    :goals: build
    :compact:

samples/subsys/display/cfb_custom_font/README.rst

@@ -32,7 +32,7 @@ directory:
 Example building for the reel_board with SSD16XX display support:
 
 .. zephyr-app-commands::
-   :zephyr-app: samples/display/cfb_custom_font
+   :zephyr-app: samples/subsys/display/cfb_custom_font
    :host-os: unix
    :board: reel_board
    :goals: flash

samples/subsys/display/cfb_shell/README.rst

@@ -14,7 +14,7 @@ Building and Running
 Build the sample app by choosing the target board, for example:
 
 .. zephyr-app-commands::
-   :zephyr-app: samples/display/cfb_shell
+   :zephyr-app: samples/subsys/display/cfb_shell
    :board: reel_board
    :goals: build
 

samples/subsys/display/grove_display/README.rst

@@ -41,7 +41,7 @@ shield interface. For example, it can be run on the FRDM K64F board as
 described below:
 
 .. zephyr-app-commands::
-   :zephyr-app: samples/display/grove_display
+   :zephyr-app: samples/subsys/display/grove_display
    :board: frdm_k64f
    :goals: flash
    :compact:

samples/subsys/display/lvgl/README.rst

@@ -49,7 +49,7 @@ Building and Running
 Example building for :ref:`nrf52840dk_nrf52840`:
 
 .. zephyr-app-commands::
-   :zephyr-app: samples/display/lvgl
+   :zephyr-app: samples/subsys/display/lvgl
    :board: nrf52840dk_nrf52840
    :shield: adafruit_2_8_tft_touch_v2
    :goals: build flash
@@ -57,9 +57,12 @@ Example building for :ref:`nrf52840dk_nrf52840`:
 Example building for :ref:`native_posix`:
 
 .. zephyr-app-commands::
-   :zephyr-app: samples/display/lvgl
+   :zephyr-app: samples/subsys/display/lvgl
    :board: native_posix
-   :goals: build flash
+   :goals: build run
+
+Alternatively, if building from a 64-bit host machine, the previous target
+board argument may also be replaced by ``native_posix_64``.
 
 References
 **********

samples/subsys/display/lvgl/sample.yaml

@@ -39,7 +39,7 @@ tests:
     tags: shield
   sample.display.dummy:
     build_only: true
-    platform_allow: native_posix
+    platform_allow: native_posix native_posix_64
     extra_args: DTC_OVERLAY_FILE="dummy_dc.overlay"
     extra_configs:
       - CONFIG_DUMMY_DISPLAY=y