modules: lvgl: support the frame buffer address and stride alignment

Add support for the frame buffer address and stride alignment.
If user set the CONFIG_LV_DRAW_BUF_ALIGN to not be 4, the buffers
shall be allocated aoocrdingly.
If user set the CONFIG_LV_DRAW_BUF_STRIDE_ALIGN to not be 1, the
methods of flushing the display shall set the pitch accordingly.

Signed-off-by: Kate Wang <yumeng.wang@nxp.com>

modules/lvgl/lvgl.c

@@ -27,6 +27,8 @@ struct lvgl_disp_data disp_data[DT_ZEPHYR_DISPLAYS_COUNT] = {{
 	.blanking_on = false,
 }};
 
+#define DISPLAY_BUFFER_ALIGN(alignbytes) __aligned(alignbytes)
+
 #if DT_HAS_COMPAT_STATUS_OKAY(zephyr_displays)
 #define DISPLAY_NODE(n) DT_ZEPHYR_DISPLAY(n)
 #elif DT_HAS_CHOSEN(zephyr_display)
@@ -77,21 +79,21 @@ static uint8_t *mono_vtile_buf_p[DT_ZEPHYR_DISPLAYS_COUNT] = {NULL};
 /* prevent unaligned memory accesses. */
 
 /* clang-format off */
-#define LV_BUFFERS_DEFINE(n)                                                                       \
-	static uint8_t buf0_##n[BUFFER_SIZE(n)]							   \
-	IF_ENABLED(CONFIG_LV_Z_VDB_CUSTOM_SECTION, (Z_GENERIC_SECTION(.lvgl_buf)))                 \
-						       __aligned(CONFIG_LV_Z_VDB_ALIGN);           \
-                                                                                                   \
-	IF_ENABLED(CONFIG_LV_Z_DOUBLE_VDB, (							   \
-	static uint8_t buf1_##n[BUFFER_SIZE(n)]							   \
-	IF_ENABLED(CONFIG_LV_Z_VDB_CUSTOM_SECTION, (Z_GENERIC_SECTION(.lvgl_buf)))		   \
-			__aligned(CONFIG_LV_Z_VDB_ALIGN);					   \
-	))                                            \
-                                                                                                   \
-	IF_ENABLED(ALLOC_MONOCHROME_CONV_BUFFER, (						   \
-	static uint8_t mono_vtile_buf_##n[BUFFER_SIZE(n)]					   \
-	IF_ENABLED(CONFIG_LV_Z_VDB_CUSTOM_SECTION, (Z_GENERIC_SECTION(.lvgl_buf)))		   \
-			__aligned(CONFIG_LV_Z_VDB_ALIGN);					   \
+#define LV_BUFFERS_DEFINE(n)									\
+	static DISPLAY_BUFFER_ALIGN(LV_DRAW_BUF_ALIGN) uint8_t buf0_##n[BUFFER_SIZE(n)]		\
+	IF_ENABLED(CONFIG_LV_Z_VDB_CUSTOM_SECTION, (Z_GENERIC_SECTION(.lvgl_buf)))		\
+						       __aligned(CONFIG_LV_Z_VDB_ALIGN);	\
+												\
+	IF_ENABLED(CONFIG_LV_Z_DOUBLE_VDB, (							\
+	static DISPLAY_BUFFER_ALIGN(LV_DRAW_BUF_ALIGN) uint8_t buf1_##n[BUFFER_SIZE(n)]		\
+	IF_ENABLED(CONFIG_LV_Z_VDB_CUSTOM_SECTION, (Z_GENERIC_SECTION(.lvgl_buf)))		\
+			__aligned(CONFIG_LV_Z_VDB_ALIGN);					\
+	))											\
+												\
+	IF_ENABLED(ALLOC_MONOCHROME_CONV_BUFFER, (						\
+	static uint8_t mono_vtile_buf_##n[BUFFER_SIZE(n)]					\
+	IF_ENABLED(CONFIG_LV_Z_VDB_CUSTOM_SECTION, (Z_GENERIC_SECTION(.lvgl_buf)))		\
+			__aligned(CONFIG_LV_Z_VDB_ALIGN);					\
 	))
 
 FOR_EACH(LV_BUFFERS_DEFINE, (), LV_DISPLAYS_IDX_LIST);

modules/lvgl/lvgl_display_16bit.c

@@ -20,7 +20,7 @@ void lvgl_flush_cb_16bit(lv_display_t *display, const lv_area_t *area, uint8_t *
 	flush.y = area->y1;
 	flush.desc.buf_size = w * 2U * h;
 	flush.desc.width = w;
-	flush.desc.pitch = w;
+	flush.desc.pitch = ROUND_UP(w * 2U, LV_DRAW_BUF_STRIDE_ALIGN) / 2U;
 	flush.desc.height = h;
 	flush.buf = (void *)px_map;
 

modules/lvgl/lvgl_display_24bit.c

@@ -20,7 +20,7 @@ void lvgl_flush_cb_24bit(lv_display_t *display, const lv_area_t *area, uint8_t *
 	flush.y = area->y1;
 	flush.desc.buf_size = w * 3U * h;
 	flush.desc.width = w;
-	flush.desc.pitch = w;
+	flush.desc.pitch = ROUND_UP(w * 3U, LV_DRAW_BUF_STRIDE_ALIGN) / 3U;
 	flush.desc.height = h;
 	flush.buf = (void *)px_map;
 

modules/lvgl/lvgl_display_32bit.c

@@ -20,7 +20,7 @@ void lvgl_flush_cb_32bit(lv_display_t *display, const lv_area_t *area, uint8_t *
 	flush.y = area->y1;
 	flush.desc.buf_size = w * 4U * h;
 	flush.desc.width = w;
-	flush.desc.pitch = w;
+	flush.desc.pitch = ROUND_UP(w * 4U, LV_DRAW_BUF_STRIDE_ALIGN) / 4U;
 	flush.desc.height = h;
 	flush.buf = (void *)px_map;
 	lvgl_flush_display(&flush);

modules/lvgl/lvgl_display_8bit.c

@@ -19,7 +19,7 @@ void lvgl_flush_cb_8bit(lv_display_t *display, const lv_area_t *area, uint8_t *p
 	flush.y = area->y1;
 	flush.desc.buf_size = w * h;
 	flush.desc.width = w;
-	flush.desc.pitch = w;
+	flush.desc.pitch = ROUND_UP(w, LV_DRAW_BUF_STRIDE_ALIGN);
 	flush.desc.height = h;
 	flush.buf = (void *)px_map;