meta-openembedded/meta-oe/recipes-graphics/lvgl/files/0005-Add-DRM-KMS-example-support.patch

From dabf40559428733413432afa29598bc145aa6636 Mon Sep 17 00:00:00 2001
From: Marek Vasut <marex@denx.de>
Date: Tue, 12 Mar 2024 03:08:13 +0100
Subject: [PATCH 5/6] Add DRM/KMS example support

Extend the main.c to support both legacy fbdev and DRM/KMS initialization.

To use legacy fbdev support, adjust lv_conf.h as follows:
LV_USE_LINUX_FBDEV=1
LV_USE_LINUX_DRM=0

To use DRM/KMS support, adjust lv_conf.h as follows:
LV_USE_LINUX_FBDEV=0
LV_USE_LINUX_DRM=1

Upstream-Status: Submitted [https://github.com/lvgl/lv_port_linux_frame_buffer/pull/47]
Signed-off-by: Marek Vasut <marex@denx.de>
---
 CMakeLists.txt | 5 ++++-
 main.c         | 8 ++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d91b196..c1cfb7f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,6 +12,9 @@ target_include_directories(lvgl PUBLIC ${PROJECT_SOURCE_DIR})
 
 add_executable(main main.c mouse_cursor_icon.c)
 
-target_link_libraries(main lvgl lvgl::examples lvgl::demos lvgl::thorvg ${SDL2_LIBRARIES} m pthread)
+include(${CMAKE_CURRENT_LIST_DIR}/lvgl/tests/FindLibDRM.cmake)
+include_directories(${Libdrm_INCLUDE_DIRS})
+
+target_link_libraries(main lvgl lvgl::examples lvgl::demos lvgl::thorvg ${SDL2_LIBRARIES} ${Libdrm_LIBRARIES} m pthread)
 add_custom_target (run COMMAND ${EXECUTABLE_OUTPUT_PATH}/main DEPENDS main)
 
diff --git a/main.c b/main.c
index 288519c..ab4e936 100644
--- a/main.c
+++ b/main.c
@@ -17,6 +17,14 @@ static void lv_linux_disp_init(void)
 
     lv_linux_fbdev_set_file(disp, videocard);
 }
+#elif LV_USE_LINUX_DRM
+static void lv_linux_disp_init(void)
+{
+    const char *videocard = lv_linux_get_video_card_node("/dev/dri/card0");
+    lv_display_t * disp = lv_linux_drm_create();
+
+    lv_linux_drm_set_file(disp, videocard, -1);
+}
 #else
 #error Unsupported configuration
 #endif
-- 
2.43.0