Hi, Jitao: On Sun, 2019-05-19 at 17:25 +0800, Jitao Shi wrote: > DSI panel driver need attach function which is inculde in > mipi_dsi_host_ops. > > If mipi_dsi_host_register is not in probe, dsi panel will > probe fail or more delay. In [1], you have agreed this patch just for delay not for probe fail Remove 'probe fail'.in commit message. [1] http://lists.infradead.org/pipermail/linux-mediatek/2019-May/019836.html > > So move the mipi_dsi_host_register to probe from bind. > > Signed-off-by: Jitao Shi <jitao.shi@xxxxxxxxxxxx> > --- > drivers/gpu/drm/mediatek/mtk_dsi.c | 50 ++++++++++++++++++------------ > 1 file changed, 30 insertions(+), 20 deletions(-) > > diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c > index b00eb2d2e086..6c4ac37f983d 100644 > --- a/drivers/gpu/drm/mediatek/mtk_dsi.c > +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c > @@ -1045,12 +1045,6 @@ static int mtk_dsi_bind(struct device *dev, struct device *master, void *data) > return ret; > } > > - ret = mipi_dsi_host_register(&dsi->host); > - if (ret < 0) { > - dev_err(dev, "failed to register DSI host: %d\n", ret); > - goto err_ddp_comp_unregister; > - } > - > ret = mtk_dsi_create_conn_enc(drm, dsi); > if (ret) { > DRM_ERROR("Encoder create failed with %d\n", ret); > @@ -1060,8 +1054,6 @@ static int mtk_dsi_bind(struct device *dev, struct device *master, void *data) > return 0; > > err_unregister: > - mipi_dsi_host_unregister(&dsi->host); > -err_ddp_comp_unregister: > mtk_ddp_comp_unregister(drm, &dsi->ddp_comp); > return ret; > } > @@ -1097,31 +1089,37 @@ static int mtk_dsi_probe(struct platform_device *pdev) > > dsi->host.ops = &mtk_dsi_ops; > dsi->host.dev = dev; > + dsi->dev = dev; This is for debug message, not for the timing of mipi_dsi_host_register(), so move to an independent patch. Regards, CK > + ret = mipi_dsi_host_register(&dsi->host); > + if (ret < 0) { > + dev_err(dev, "failed to register DSI host: %d\n", ret); > + return ret; > + } > > ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, > &dsi->panel, &dsi->bridge); > if (ret) > - return ret; > + goto err_unregister_host; > > dsi->engine_clk = devm_clk_get(dev, "engine"); > if (IS_ERR(dsi->engine_clk)) { > ret = PTR_ERR(dsi->engine_clk); > dev_err(dev, "Failed to get engine clock: %d\n", ret); > - return ret; > + goto err_unregister_host; > } > > dsi->digital_clk = devm_clk_get(dev, "digital"); > if (IS_ERR(dsi->digital_clk)) { > ret = PTR_ERR(dsi->digital_clk); > dev_err(dev, "Failed to get digital clock: %d\n", ret); > - return ret; > + goto err_unregister_host; > } > > dsi->hs_clk = devm_clk_get(dev, "hs"); > if (IS_ERR(dsi->hs_clk)) { > ret = PTR_ERR(dsi->hs_clk); > dev_err(dev, "Failed to get hs clock: %d\n", ret); > - return ret; > + goto err_unregister_host; > } > > regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); > @@ -1129,33 +1127,35 @@ static int mtk_dsi_probe(struct platform_device *pdev) > if (IS_ERR(dsi->regs)) { > ret = PTR_ERR(dsi->regs); > dev_err(dev, "Failed to ioremap memory: %d\n", ret); > - return ret; > + goto err_unregister_host; > } > > dsi->phy = devm_phy_get(dev, "dphy"); > if (IS_ERR(dsi->phy)) { > ret = PTR_ERR(dsi->phy); > dev_err(dev, "Failed to get MIPI-DPHY: %d\n", ret); > - return ret; > + goto err_unregister_host; > } > > comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DSI); > if (comp_id < 0) { > dev_err(dev, "Failed to identify by alias: %d\n", comp_id); > - return comp_id; > + ret = comp_id; > + goto err_unregister_host; > } > > ret = mtk_ddp_comp_init(dev, dev->of_node, &dsi->ddp_comp, comp_id, > &mtk_dsi_funcs); > if (ret) { > dev_err(dev, "Failed to initialize component: %d\n", ret); > - return ret; > + goto err_unregister_host; > } > > irq_num = platform_get_irq(pdev, 0); > if (irq_num < 0) { > - dev_err(&pdev->dev, "failed to request dsi irq resource\n"); > - return -EPROBE_DEFER; > + dev_err(&pdev->dev, "failed to get dsi irq_num: %d\n", irq_num); > + ret = irq_num; > + goto err_unregister_host; > } > > irq_set_status_flags(irq_num, IRQ_TYPE_LEVEL_LOW); > @@ -1163,14 +1163,24 @@ static int mtk_dsi_probe(struct platform_device *pdev) > IRQF_TRIGGER_LOW, dev_name(&pdev->dev), dsi); > if (ret) { > dev_err(&pdev->dev, "failed to request mediatek dsi irq\n"); > - return -EPROBE_DEFER; > + goto err_unregister_host; > } > > init_waitqueue_head(&dsi->irq_wait_queue); > > platform_set_drvdata(pdev, dsi); > > - return component_add(&pdev->dev, &mtk_dsi_component_ops); > + ret = component_add(&pdev->dev, &mtk_dsi_component_ops); > + if (ret) { > + dev_err(&pdev->dev, "failed to add component: %d\n", ret); > + goto err_unregister_host; > + } > + > + return 0; > + > +err_unregister_host: > + mipi_dsi_host_unregister(&dsi->host); > + return ret; > } > > static int mtk_dsi_remove(struct platform_device *pdev)
