lvgl: Factor out and unify lv-drivers configuration

The configuration of lv_drivers is the same in lv-drivers and lvgl-demo-fb,
the later just pulls in its own already preconfigured variant of lv-drivers
as git submodule. Pull out the lv-drivers configuration into separate file
lv-drivers.inc, so it can be shared by lv-drivers and lvgl-demo-fb recipes.

Furthermore, as the configuration support in both recipes diverged already,
merge support for both sets of configuration options. This way, lv-drivers
grows support for DRM and SDL backend, and lvgl-demo-fb for WL backend. The
PACKAGECONFIG of each recipe is left unchanged so far to avoid breaking of
existing users.

Note that LVGL_CONFIG_USE_EVDEV is new and activated for both fbdev and drm,
since both of those backends need EVDEV support right now. The libinput input
support is not available yet.

Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-graphics/lvgl/lv-drivers.inc

@@ -0,0 +1,44 @@
+PACKAGECONFIG[drm] = ",,libdrm"
+PACKAGECONFIG[fbdev] = ",,"
+PACKAGECONFIG[sdl] = ",,virtual/libsdl2"
+PACKAGECONFIG[wayland] = ",,libxkbcommon wayland"
+
+LVGL_CONFIG_USE_DRM = "${@bb.utils.contains('PACKAGECONFIG', 'drm', '1', '0', d)}"
+LVGL_CONFIG_DRM_CARD ?= "/dev/dri/card0"
+
+LVGL_CONFIG_USE_EVDEV = "${@bb.utils.contains_any('PACKAGECONFIG', 'drm fbdev', '1', '0', d)}"
+
+LVGL_CONFIG_USE_FBDEV = "${@bb.utils.contains('PACKAGECONFIG', 'fbdev', '1', '0', d)}"
+
+LVGL_CONFIG_USE_SDL = "${@bb.utils.contains('PACKAGECONFIG', 'sdl', '1', '0', d)}"
+
+LVGL_CONFIG_USE_WAYLAND = "${@bb.utils.contains('PACKAGECONFIG', 'wayland', '1', '0', d)}"
+LVGL_CONFIG_WAYLAND_HOR_RES ?= "480"
+LVGL_CONFIG_WAYLAND_VER_RES ?= "320"
+
+EXTRA_OECMAKE += "-Dinstall:BOOL=ON -DLIB_INSTALL_DIR=${baselib}"
+
+do_configure:append() {
+    # If there is a configuration template, start from that
+    [ -r "${S}/lv_drv_conf_template.h" ] && cp -Lv "${S}/lv_drv_conf_template.h" "${S}/lv_drv_conf.h"
+
+    # Configure the software using sed
+    sed -e "s|#if 0 .*Set it to \"1\" to enable the content.*|#if 1 // Enabled by ${PN}|g" \
+        \
+        -e "s|\(^#  define USE_DRM \).*|#  define USE_DRM ${LVGL_CONFIG_USE_DRM}|g" \
+        -e "s|\(^#  define DRM_CARD \).*|#  define DRM_CARD \"${LVGL_CONFIG_DRM_CARD}\"|g" \
+	\
+        -e "s|\(^#  define USE_EVDEV \).*|#  define USE_EVDEV ${LVGL_CONFIG_USE_EVDEV}|g" \
+        \
+        -e "s|\(^#  define USE_FBDEV \).*|#  define USE_FBDEV ${LVGL_CONFIG_USE_FBDEV}|g" \
+        \
+        -e "s|\(^# define USE_SDL \).*|#  define USE_SDL ${LVGL_CONFIG_USE_SDL}|g" \
+        -e "s|\(^#  define USE_SDL_GPU \).*|#  define USE_SDL_GPU 1|g" \
+        -e "s|\(^#  define SDL_DOUBLE_BUFFERED \).*|#  define SDL_DOUBLE_BUFFERED 1|g" \
+        \
+        -e "s|\(^#  define USE_WAYLAND \).*|#  define USE_WAYLAND ${LVGL_CONFIG_USE_WAYLAND}|g" \
+        -e "s|\(^ *# *define *WAYLAND_HOR_RES *\).*|\1${LVGL_CONFIG_WAYLAND_HOR_RES}|g" \
+        -e "s|\(^ *# *define *WAYLAND_VER_RES *\).*|\1${LVGL_CONFIG_WAYLAND_VER_RES}|g" \
+        \
+        -i "${S}/lv_drv_conf.h"
+}

meta-oe/recipes-graphics/lvgl/lv-drivers_8.3.0.bb

@@ -14,39 +14,15 @@ SRCREV = "71830257710f430b6d8d1c324f89f2eab52488f1"
 DEPENDS = "lvgl"
 
 PACKAGECONFIG ??= "${@bb.utils.filter('DISTRO_FEATURES', 'wayland fbdev', d)}"
-PACKAGECONFIG[fbdev] = ",,"
+require lv-drivers.inc
-PACKAGECONFIG[wayland] = ",,libxkbcommon wayland"
-LVGL_CONFIG_USE_FBDEV = "${@bb.utils.contains('PACKAGECONFIG', 'fbdev', '1', '0', d)}"
-LVGL_CONFIG_USE_WAYLAND = "${@bb.utils.contains('PACKAGECONFIG', 'wayland', '1', '0', d)}"
 
 inherit cmake
 
 S = "${WORKDIR}/git"
 
-LVGL_CONFIG_WAYLAND_HOR_RES ?= "480"
-LVGL_CONFIG_WAYLAND_VER_RES ?= "320"
-
-EXTRA_OECMAKE += "-Dinstall:BOOL=ON -DLIB_INSTALL_DIR=${baselib}"
-
 TARGET_CFLAGS += "-DLV_CONF_INCLUDE_SIMPLE=1"
 TARGET_CFLAGS += "-I${STAGING_INCDIR}/lvgl"
 
-# Upstream does not support a default configuration
-# but propose a default "disabled" template, which is used as reference
-# More configuration can be done using external configuration variables
-do_configure:append() {
-    [ -r "${S}/lv_drv_conf.h" ] \
-        || sed -e "s|#if 0 .*Set it to \"1\" to enable the content.*|#if 1 // Enabled by ${PN}|g" \
-	       \
-               -e "s|\(^#  define USE_FBDEV \).*|#  define USE_FBDEV ${LVGL_CONFIG_USE_FBDEV}|g" \
-               -e "s|\(^#  define USE_EVDEV \).*|#  define USE_EVDEV ${LVGL_CONFIG_USE_FBDEV}|g" \
-	       \
-               -e "s|\(^#  define USE_WAYLAND \).*|#  define USE_WAYLAND ${LVGL_CONFIG_USE_WAYLAND}|g" \
-	       -e "s|\(^ *# *define *WAYLAND_HOR_RES *\).*|\1${LVGL_CONFIG_WAYLAND_HOR_RES}|g" \
- 	       -e "s|\(^ *# *define *WAYLAND_VER_RES *\).*|\1${LVGL_CONFIG_WAYLAND_VER_RES}|g" \
-          < "${S}/lv_drv_conf_template.h" > "${S}/lv_drv_conf.h"
-}
-
 FILES:${PN}-dev += "\
     ${includedir}/lvgl/lv_drivers/ \
     "

meta-oe/recipes-graphics/lvgl/lvgl-demo-fb_8.3.0.bb

@@ -11,30 +11,15 @@ SRCREV = "adf2c4490e17a1b9ec1902cc412a24b3b8235c8e"
 EXTRA_OEMAKE = "DESTDIR=${D}"
 
 PACKAGECONFIG ??= "drm"
-PACKAGECONFIG[drm] = ",,libdrm"
+require lv-drivers.inc
-PACKAGECONFIG[fbdev] = ",,"
-PACKAGECONFIG[sdl] = ",,virtual/libsdl2"
-LVGL_CONFIG_USE_DRM = "${@bb.utils.contains('PACKAGECONFIG', 'drm', '1', '0', d)}"
-LVGL_CONFIG_DRM_CARD ?= "/dev/dri/card0"
-LVGL_CONFIG_USE_FBDEV = "${@bb.utils.contains('PACKAGECONFIG', 'fbdev', '1', '0', d)}"
-LVGL_CONFIG_USE_SDL = "${@bb.utils.contains('PACKAGECONFIG', 'sdl', '1', '0', d)}"
 
 inherit cmake
 
 S = "${WORKDIR}/git"
 
-EXTRA_OECMAKE += "-Dinstall:BOOL=ON -DLIB_INSTALL_DIR=${baselib}"
 TARGET_CFLAGS += "-I${STAGING_INCDIR}/libdrm"
 
 do_configure:prepend() {
-	sed -i -e "s|\(^#  define USE_FBDEV \).*|#  define USE_FBDEV ${LVGL_CONFIG_USE_FBDEV}|g" \
-		-e "s|\(^#  define USE_DRM \).*|#  define USE_DRM ${LVGL_CONFIG_USE_DRM}|g" \
-		-e "s|\(^#  define DRM_CARD \).*|#  define DRM_CARD \"${LVGL_CONFIG_DRM_CARD}\"|g" \
-		-e "s|\(^# define USE_SDL \).*|#  define USE_SDL ${LVGL_CONFIG_USE_SDL}|g" \
-		-e "s|\(^#  define USE_SDL_GPU \).*|#  define USE_SDL_GPU 1|g" \
-		-e "s|\(^#  define SDL_DOUBLE_BUFFERED \).*|#  define SDL_DOUBLE_BUFFERED 1|g" \
-	"${S}/lv_drv_conf.h"
-
 	if [ "${LVGL_CONFIG_USE_DRM}" -eq 1 ] ; then
 		# Add libdrm build dependency
 		sed -i '/^target_link_libraries/ s@lvgl::drivers@& drm@' "${S}/CMakeLists.txt"