Hi, Jitao:

Jitao Shi jitao.shi@mediatek.com 於 2021年4月7日 週三 下午10:37寫道：

The bridge chip ANX7625 require the line packets ending at the sametime or ANX7625 will shift the screen.

Change-Id: Ia324ad28fbff54140feedb9a1d6bfb2b246d0447 Signed-off-by: Jitao Shi jitao.shi@mediatek.com

---

drivers/gpu/drm/mediatek/mtk_dsi.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c index a1ff152ef468..e825a80862de 100644 --- a/drivers/gpu/drm/mediatek/mtk_dsi.c +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c @@ -194,6 +194,8 @@ struct mtk_dsi { struct clk *hs_clk;

    u32 data_rate;

•   /* force dsi line end without dsi_null data */
  

•   bool force_dsi_end_without_null;
  
    unsigned long mode_flags;
    enum mipi_dsi_pixel_format format;
  

@@ -495,6 +497,13 @@ static void mtk_dsi_config_vdo_timing(struct mtk_dsi *dsi) DRM_WARN("HFP + HBP less than d-phy, FPS will under 60Hz\n"); }

•   if (dsi->force_dsi_end_without_null) {
  

•           horizontal_sync_active_byte = roundup(horizontal_sync_active_byte, dsi->lanes) - 2;
  

•           horizontal_frontporch_byte = roundup(horizontal_frontporch_byte, dsi->lanes) - 2;
  

•           horizontal_backporch_byte = roundup(horizontal_backporch_byte, dsi->lanes) - 2;
  

•           horizontal_backporch_byte -= (vm->hactive * dsi_tmp_buf_bpp + 2) % dsi->lanes;
  

•   }
  

•   writel(horizontal_sync_active_byte, dsi->regs + DSI_HSA_WC);
    writel(horizontal_backporch_byte, dsi->regs + DSI_HBP_WC);
    writel(horizontal_frontporch_byte, dsi->regs + DSI_HFP_WC);
  

@@ -1091,6 +1100,9 @@ static int mtk_dsi_probe(struct platform_device *pdev) dsi->bridge.of_node = dev->of_node; dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;

•   dsi->force_dsi_end_without_null = of_property_read_bool(dev->of_node,
  

•                                                           "force_dsi_end_without_null");
  

If force_dsi_end_without_null is caused by ANX7625, I think we should get this information from ANX7625.

Regards, Chun-Kuang.

•   drm_bridge_add(&dsi->bridge);
  
    ret = component_add(&pdev->dev, &mtk_dsi_component_ops);
  

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