Re: [PATCH v6 1/1] drm/mediatek: force hsa hbp hfp packets multiple of lanenum to avoid screen shift

Hi, Jitao:

Jitao Shi jitao.shi@mediatek.com 於 2021年8月8日 週日 下午9:41寫道：

The bridge chip ANX7625 requires the packets on lanes aligned at the end, or ANX7625 will shift the screen.

In anx7625_attach_dsi(), it call mipi_dsi_attach(), and it call into mtk_dsi_host_attach(). I would like to pass this information from anx7623 driver to mtk_dsi driver when attach.

Regards, Chun-Kuang.

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

drivers/gpu/drm/mediatek/mtk_dsi.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c index ae403c67cbd9..033234d51e86 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;
  

@@ -499,6 +501,13 @@ 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);
  

@@ -1095,6 +1104,10 @@ static int mtk_dsi_probe(struct platform_device *pdev) dsi->bridge.of_node = dev->of_node; dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;

•   if (dsi->next_bridge)
  

•           dsi->force_dsi_end_without_null = of_device_is_compatible(dsi->next_bridge->of_node,
  

•                                                                     "analogix,anx7625");
  

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

-- 2.25.1