V821驱动8080 8bit接口TFT屏，画面割裂。

[czlz_fun]

屏为ST7789的8080 8位并口屏。分辨率为：240*320。不带TE。参考驱动配置https://docs.aw-ol.com/docs/soc/v821/disp/disp2/disp_driver_lcd_i8080/

&disp {
	disp_init_enable         = <1>;
	disp_mode                = <0>;

	screen0_output_type      = <1>;
	screen0_output_mode      = <4>;
	screen0_to_lcd_index     = <0>;

	screen1_output_type      = <3>;
	screen1_output_mode      = <10>;
	screen1_to_lcd_index     = <2>;

	screen1_output_format    = <0>;
	screen1_output_bits      = <0>;
	screen1_output_eotf      = <4>;
	screen1_output_cs        = <257>;
	screen1_output_dvi_hdmi  = <2>;
	screen1_output_range     = <2>;
	screen1_output_scan      = <0>;
	screen1_output_aspect_ratio = <8>;

	fb_format                = <0>;
	fb_num                   = <1>;
	fb_debug                 = <0>;
	/*<disp channel layer zorder>*/
	fb0_map                  = <0 0 0 16>;
	fb0_width                = <240>;
	fb0_height               = <320>;
	/*<disp channel layer zorder>*/
	fb1_map                  = <0 2 0 16>;
	fb1_width                = <300>;
	fb1_height               = <300>;
	/*<disp channel layer zorder>*/
	fb2_map                  = <1 0 0 16>;
	fb2_width                = <1280>;
	fb2_height               = <720>;
	/*<disp channel layer zorder>*/
	fb3_map                  = <1 1 0 16>;
	fb3_width                = <300>;
	fb3_height               = <300>;

	chn_cfg_mode             = <1>;
	disp_para_zone           = <1>;
};

&lcd0 {
	lcd_used            = <1>;

	lcd_driver_name     = "st7789v_cpu";
	lcd_if              = <1>;

	lcd_x               = <240>;
	lcd_y               = <320>;
	lcd_width           = <43>;
	lcd_height          = <63>;

	lcd_dclk_freq       = <20>;

	lcd_hbp             = <20>;
	lcd_ht              = <298>;
	lcd_hspw            = <10>;
	lcd_vbp             = <8>;
	lcd_vt              = <336>;
	lcd_vspw            = <2>;

	lcd_backlight       = <50>;
	lcd_pwm_used        = <1>;
	lcd_pwm_ch          = <4>;
	lcd_pwm_freq        = <50000>;
	lcd_pwm_pol         = <1>;
	lcd_pwm_max_limit   = <255>;
	lcd_bright_curve_en = <1>;

	lcd_frm             = <2>;
	lcd_gamma_en        = <0>;
	lcd_bright_curve_en = <0>;
	lcd_cmap_en         = <0>;

	lcdgamma4iep        = <22>;
	lcd_cpu_mode        = <1>;
	lcd_cpu_te          = <2>;
	lcd_cpu_if          = <14>;

	/* rst */
	lcd_gpio_0          = <&pio PD 19 GPIO_ACTIVE_LOW>;
	/* cs */
	lcd_gpio_1          = <&pio PD 14 GPIO_ACTIVE_LOW>;

	pinctrl-0 = <&rgb8_pins_a>, <&rgb8_pins_ctl_a>;
	pinctrl-1 = <&rgb8_pins_b>, <&rgb8_pins_ctl_b>;
};

不知道应当如何调试解决这个问题。

[awwwwa]

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);