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source build/envsetup.sh
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完整的日志有吗？

repo sync -j1

@jeff123a BSP引脚在V3s QFP封装并未引出，他是一个独立的引脚，在BGA封装的V3上硬件叫做 UBOOT 脚，位于 T9 球，并不是SPI_MISO引脚

dtsi里也需要对应修改，参照sdc0配置caps

AW_ION_IOC_NEW_ALLOC 内存不够了，需要增加ion内存，修改设备树 size_pool相关节点
https://docs.aw-ol.com/docs/soc/v821/software/sdk_sys_conf#预留内存

试一下加上刷cache的接口

diff --git a/drivers/video/sunxi/disp2/disp/dev_disp.c b/drivers/video/sunxi/disp2/disp/dev_disp.c
index 8ddbd28..c084de0 100644
--- a/drivers/video/sunxi/disp2/disp/dev_disp.c
+++ b/drivers/video/sunxi/disp2/disp/dev_disp.c
@@ -3158,6 +3158,11 @@ static int disp_mem_request(int sel, u32 size)
 #endif
 }

+void disp_flush_cache(dma_addr_t addr, u32 len)
+{
+    dma_sync_single_for_device(g_disp_drv.dev, addr, len, DMA_TO_DEVICE);
+}
+
 static int disp_mem_release(int sel)
 {
     if (sel >= DISP_MEM_NUM || sel < 0) {
diff --git a/drivers/video/sunxi/disp2/disp/dev_disp.h b/drivers/video/sunxi/disp2/disp/dev_disp.h
index 6478db3..cdd250f 100644
--- a/drivers/video/sunxi/disp2/disp/dev_disp.h
+++ b/drivers/video/sunxi/disp2/disp/dev_disp.h
@@ -327,6 +327,7 @@ int disp_resume(struct device *dev);
 s32 disp_create_heap(u32 pHeapHead, u32 pHeapHeadPhy, u32 nHeapSize);
 void *disp_malloc(u32 num_bytes, void *phy_addr);
 void disp_free(void *virt_addr, void *phys_addr, u32 num_bytes);
+void disp_flush_cache(dma_addr_t addr, u32 len);

 extern s32 disp_register_sync_proc(void (*proc) (u32));
 extern s32 disp_unregister_sync_proc(void (*proc) (u32));
diff --git a/drivers/video/sunxi/disp2/disp/fb_platform.c b/drivers/video/sunxi/disp2/disp/fb_platform.c
index 7e95e74..c935ecc 100644
--- a/drivers/video/sunxi/disp2/disp/fb_platform.c
+++ b/drivers/video/sunxi/disp2/disp/fb_platform.c
@@ -341,6 +341,8 @@ int platform_update_fb_output(void *hw_info, const struct fb_var_screeninfo *var
     struct disp_manager *mgr;
     mutex_lock(&info->lock);
     info->config.info.fb.crop.y = ((long long)var->yoffset) << 32;
+
+    disp_flush_cache(info->dma_mem.device_addr,info->size);
 #if IS_ENABLED(CONFIG_AW_DISP2_FB_HW_ROTATION_SUPPORT)
     if (info->fb_rot)
         fb_g2d_rot_apply(info->fb_rot, &info->config, var->yoffset);

821的g2d只支持旋转，不支持bitblt

这里加上打印看下输出

Qt一般使用库移植即可，交叉编译后上机跑

SUNXI remote processor support是kernel_menuconfig