| Message ID | 20190214044243.129920-1-jitao.shi@mediatek.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/3] drm/mediatek: move mipi_dsi_host_register to probe | expand |
Just some comments on the error path, I'm not sure about the change itself. On Thu, Feb 14, 2019 at 12:42 PM Jitao Shi <jitao.shi@mediatek.com> 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. > > So move the mipi_dsi_host_register to probe from bind. > > Signed-off-by: Jitao Shi <jitao.shi@mediatek.com> > --- > drivers/gpu/drm/mediatek/mtk_dsi.c | 49 ++++++++++++++++++------------ > 1 file changed, 30 insertions(+), 19 deletions(-) > > diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c > index 27b507eb4a99..93fa255b4aad 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; > + ret = mipi_dsi_host_register(&dsi->host); > + if (ret < 0) { > + dev_err(dev, "failed to register DSI host: %d\n", ret); > + return -EPROBE_DEFER; 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; > + ret = -EPROBE_DEFER; I think you need to do ret = irq_num here, too (and yes, it was probably wrong before?) > + goto err_unregister_host; > } > > irq_set_status_flags(irq_num, IRQ_TYPE_LEVEL_LOW); > @@ -1163,14 +1163,25 @@ 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; > + ret = -EPROBE_DEFER; Ditto, I'd not reassign ret. > + 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) { > + ret = -EPROBE_DEFER; Ditto (this one _was_ right before). > + 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) > -- > 2.20.1 >
On Thu, Feb 14, 2019 at 12:42:41PM +0800, Jitao Shi wrote: > DSI panel driver need attach function which is inculde in > mipi_dsi_host_ops. Which function is required from dsi_host? Sean > > If mipi_dsi_host_register is not in probe, dsi panel will > probe fail or more delay. > > So move the mipi_dsi_host_register to probe from bind. > > Signed-off-by: Jitao Shi <jitao.shi@mediatek.com> > --- > drivers/gpu/drm/mediatek/mtk_dsi.c | 49 ++++++++++++++++++------------ > 1 file changed, 30 insertions(+), 19 deletions(-) > > diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c > index 27b507eb4a99..93fa255b4aad 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; > + ret = mipi_dsi_host_register(&dsi->host); > + if (ret < 0) { > + dev_err(dev, "failed to register DSI host: %d\n", ret); > + return -EPROBE_DEFER; > + } > > 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; > + ret = -EPROBE_DEFER; > + goto err_unregister_host; > } > > irq_set_status_flags(irq_num, IRQ_TYPE_LEVEL_LOW); > @@ -1163,14 +1163,25 @@ 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; > + ret = -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) { > + ret = -EPROBE_DEFER; > + 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) > -- > 2.20.1 >
On Thu, 2019-02-14 at 15:48 -0500, Sean Paul wrote: > On Thu, Feb 14, 2019 at 12:42:41PM +0800, Jitao Shi wrote: > > DSI panel driver need attach function which is inculde in > > mipi_dsi_host_ops. > > Which function is required from dsi_host? > > Sean > mipi_dsi_attach request the mipi_dsi_host_register ready. for example. mipi_dsi_attach is called by panel_simple_dsi_probe. https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/gpu/drm/panel/panel-simple.c?h=v5.0-rc6#n2987 jitao > > > > If mipi_dsi_host_register is not in probe, dsi panel will > > probe fail or more delay. > > > > So move the mipi_dsi_host_register to probe from bind. > > > > Signed-off-by: Jitao Shi <jitao.shi@mediatek.com> > > --- > > drivers/gpu/drm/mediatek/mtk_dsi.c | 49 ++++++++++++++++++------------ > > 1 file changed, 30 insertions(+), 19 deletions(-) > > > > diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c > > index 27b507eb4a99..93fa255b4aad 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; > > + ret = mipi_dsi_host_register(&dsi->host); > > + if (ret < 0) { > > + dev_err(dev, "failed to register DSI host: %d\n", ret); > > + return -EPROBE_DEFER; > > + } > > > > 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; > > + ret = -EPROBE_DEFER; > > + goto err_unregister_host; > > } > > > > irq_set_status_flags(irq_num, IRQ_TYPE_LEVEL_LOW); > > @@ -1163,14 +1163,25 @@ 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; > > + ret = -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) { > > + ret = -EPROBE_DEFER; > > + 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) > > -- > > 2.20.1 > > >
On Thu, 2019-02-14 at 14:02 +0800, Nicolas Boichat wrote: > Just some comments on the error path, I'm not sure about the change itself. > > On Thu, Feb 14, 2019 at 12:42 PM Jitao Shi <jitao.shi@mediatek.com> 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. > > > > So move the mipi_dsi_host_register to probe from bind. > > > > Signed-off-by: Jitao Shi <jitao.shi@mediatek.com> > > --- > > drivers/gpu/drm/mediatek/mtk_dsi.c | 49 ++++++++++++++++++------------ > > 1 file changed, 30 insertions(+), 19 deletions(-) > > > > diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c > > index 27b507eb4a99..93fa255b4aad 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; > > + ret = mipi_dsi_host_register(&dsi->host); > > + if (ret < 0) { > > + dev_err(dev, "failed to register DSI host: %d\n", ret); > > + return -EPROBE_DEFER; > > return ret > Ok, I'll fix it next version. > > + } > > > > 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; > > + ret = -EPROBE_DEFER; > > I think you need to do ret = irq_num here, too (and yes, it was > probably wrong before?) > Yes, the "ret = irq_num" is right. We regard all the return error case as "-EPROBE_DEFER". Actually the error case (ex. EXIO) should return error case. I'll fix it next version. > > + goto err_unregister_host; > > } > > > > irq_set_status_flags(irq_num, IRQ_TYPE_LEVEL_LOW); > > @@ -1163,14 +1163,25 @@ 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; > > + ret = -EPROBE_DEFER; > > Ditto, I'd not reassign ret. I'll fix it next version. > > > + 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) { > > + ret = -EPROBE_DEFER; > > Ditto (this one _was_ right before). I'll fix it next version. > > > + 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) > > -- > > 2.20.1 > >
diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c index 27b507eb4a99..93fa255b4aad 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; + ret = mipi_dsi_host_register(&dsi->host); + if (ret < 0) { + dev_err(dev, "failed to register DSI host: %d\n", ret); + return -EPROBE_DEFER; + } 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; + ret = -EPROBE_DEFER; + goto err_unregister_host; } irq_set_status_flags(irq_num, IRQ_TYPE_LEVEL_LOW); @@ -1163,14 +1163,25 @@ 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; + ret = -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) { + ret = -EPROBE_DEFER; + 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)
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. So move the mipi_dsi_host_register to probe from bind. Signed-off-by: Jitao Shi <jitao.shi@mediatek.com> --- drivers/gpu/drm/mediatek/mtk_dsi.c | 49 ++++++++++++++++++------------ 1 file changed, 30 insertions(+), 19 deletions(-)