From 6b526fed0e688e3926bd43a09f2f36cba3983ce2 Mon Sep 17 00:00:00 2001 From: Guennadi Liakhovetski Date: Fri, 1 Jul 2011 11:19:58 -0300 Subject: [PATCH] [media] V4L: sh_mobile_csi2: switch away from using the soc-camera bus notifier This moves us one more step closer to eliminating the soc-camera bus and devices on it. Besides, as a side effect, CSI-2 runtime PM on sh-mobile secomes finer grained now: we only have to power on the interface, when the device nodes are open. Signed-off-by: Guennadi Liakhovetski Acked-by: Paul Mundt Signed-off-by: Mauro Carvalho Chehab --- arch/arm/mach-shmobile/board-ap4evb.c | 12 +- drivers/media/video/sh_mobile_ceu_camera.c | 117 +++++++++++++----- drivers/media/video/sh_mobile_csi2.c | 135 +++++++++++---------- include/media/sh_mobile_ceu.h | 10 +- include/media/sh_mobile_csi2.h | 8 +- 5 files changed, 180 insertions(+), 102 deletions(-) diff --git a/arch/arm/mach-shmobile/board-ap4evb.c b/arch/arm/mach-shmobile/board-ap4evb.c index 803bc6edfca4..67b3d0b752b7 100644 --- a/arch/arm/mach-shmobile/board-ap4evb.c +++ b/arch/arm/mach-shmobile/board-ap4evb.c @@ -957,19 +957,16 @@ static struct resource csi2_resources[] = { }, }; -static struct platform_device csi2_device = { - .name = "sh-mobile-csi2", - .id = 0, +static struct sh_mobile_ceu_companion csi2 = { + .id = 0, .num_resources = ARRAY_SIZE(csi2_resources), .resource = csi2_resources, - .dev = { - .platform_data = &csi2_info, - }, + .platform_data = &csi2_info, }; static struct sh_mobile_ceu_info sh_mobile_ceu_info = { .flags = SH_CEU_FLAG_USE_8BIT_BUS, - .csi2_dev = &csi2_device.dev, + .csi2 = &csi2, }; static struct resource ceu_resources[] = { @@ -1013,7 +1010,6 @@ static struct platform_device *ap4evb_devices[] __initdata = { &lcdc1_device, &lcdc_device, &hdmi_device, - &csi2_device, &ceu_device, &ap4evb_camera, &meram_device, diff --git a/drivers/media/video/sh_mobile_ceu_camera.c b/drivers/media/video/sh_mobile_ceu_camera.c index 33e126e43b1f..152a65993286 100644 --- a/drivers/media/video/sh_mobile_ceu_camera.c +++ b/drivers/media/video/sh_mobile_ceu_camera.c @@ -38,6 +38,7 @@ #include #include #include +#include #include #include #include @@ -95,6 +96,7 @@ struct sh_mobile_ceu_buffer { struct sh_mobile_ceu_dev { struct soc_camera_host ici; struct soc_camera_device *icd; + struct platform_device *csi2_pdev; unsigned int irq; void __iomem *base; @@ -498,11 +500,26 @@ out: return IRQ_HANDLED; } +static struct v4l2_subdev *find_csi2(struct sh_mobile_ceu_dev *pcdev) +{ + struct v4l2_subdev *sd; + + if (!pcdev->csi2_pdev) + return NULL; + + v4l2_device_for_each_subdev(sd, &pcdev->ici.v4l2_dev) + if (&pcdev->csi2_pdev->dev == v4l2_get_subdevdata(sd)) + return sd; + + return NULL; +} + /* Called with .video_lock held */ static int sh_mobile_ceu_add_device(struct soc_camera_device *icd) { struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct sh_mobile_ceu_dev *pcdev = ici->priv; + struct v4l2_subdev *csi2_sd; int ret; if (pcdev->icd) @@ -515,8 +532,16 @@ static int sh_mobile_ceu_add_device(struct soc_camera_device *icd) pm_runtime_get_sync(ici->v4l2_dev.dev); ret = sh_mobile_ceu_soft_reset(pcdev); - if (!ret) + + csi2_sd = find_csi2(pcdev); + + ret = v4l2_subdev_call(csi2_sd, core, s_power, 1); + if (ret != -ENODEV && ret != -ENOIOCTLCMD && ret < 0) { + pm_runtime_put_sync(ici->v4l2_dev.dev); + } else { pcdev->icd = icd; + ret = 0; + } return ret; } @@ -526,9 +551,11 @@ static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd) { struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct sh_mobile_ceu_dev *pcdev = ici->priv; + struct v4l2_subdev *csi2_sd = find_csi2(pcdev); BUG_ON(icd != pcdev->icd); + v4l2_subdev_call(csi2_sd, core, s_power, 0); /* disable capture, disable interrupts */ ceu_write(pcdev, CEIER, 0); sh_mobile_ceu_soft_reset(pcdev); @@ -640,7 +667,7 @@ static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd) } /* CSI2 special configuration */ - if (pcdev->pdata->csi2_dev) { + if (pcdev->pdata->csi2) { in_width = ((in_width - 2) * 2); left_offset *= 2; } @@ -782,7 +809,7 @@ static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd, value |= pcdev->is_16bit ? 1 << 12 : 0; /* CSI2 mode */ - if (pcdev->pdata->csi2_dev) + if (pcdev->pdata->csi2) value |= 3 << 12; ceu_write(pcdev, CAMCR, value); @@ -920,7 +947,7 @@ static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int return 0; } - if (!pcdev->pdata->csi2_dev) { + if (!pcdev->pdata->csi2) { ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample); if (ret < 0) return 0; @@ -1943,7 +1970,7 @@ static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev) .completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion), .notifier.notifier_call = bus_notify, }; - struct device *csi2; + struct sh_mobile_ceu_companion *csi2; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); irq = platform_get_irq(pdev, 0); @@ -2016,26 +2043,61 @@ static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev) pcdev->ici.drv_name = dev_name(&pdev->dev); pcdev->ici.ops = &sh_mobile_ceu_host_ops; + pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev); + if (IS_ERR(pcdev->alloc_ctx)) { + err = PTR_ERR(pcdev->alloc_ctx); + goto exit_free_clk; + } + + err = soc_camera_host_register(&pcdev->ici); + if (err) + goto exit_free_ctx; + /* CSI2 interfacing */ - csi2 = pcdev->pdata->csi2_dev; + csi2 = pcdev->pdata->csi2; if (csi2) { - wait.dev = csi2; + struct platform_device *csi2_pdev = + platform_device_alloc("sh-mobile-csi2", csi2->id); + struct sh_csi2_pdata *csi2_pdata = csi2->platform_data; + + if (!csi2_pdev) { + err = -ENOMEM; + goto exit_host_unregister; + } + + pcdev->csi2_pdev = csi2_pdev; + + err = platform_device_add_data(csi2_pdev, csi2_pdata, sizeof(*csi2_pdata)); + if (err < 0) + goto exit_pdev_put; + + csi2_pdata = csi2_pdev->dev.platform_data; + csi2_pdata->v4l2_dev = &pcdev->ici.v4l2_dev; + + csi2_pdev->resource = csi2->resource; + csi2_pdev->num_resources = csi2->num_resources; + + err = platform_device_add(csi2_pdev); + if (err < 0) + goto exit_pdev_put; + + wait.dev = &csi2_pdev->dev; err = bus_register_notifier(&platform_bus_type, &wait.notifier); if (err < 0) - goto exit_free_clk; + goto exit_pdev_unregister; /* * From this point the driver module will not unload, until * we complete the completion. */ - if (!csi2->driver) { + if (!csi2_pdev->dev.driver) { complete(&wait.completion); /* Either too late, or probing failed */ bus_unregister_notifier(&platform_bus_type, &wait.notifier); err = -ENXIO; - goto exit_free_clk; + goto exit_pdev_unregister; } /* @@ -2044,34 +2106,28 @@ static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev) * the "owner" is safe! */ - err = try_module_get(csi2->driver->owner); + err = try_module_get(csi2_pdev->dev.driver->owner); /* Let notifier complete, if it has been locked */ complete(&wait.completion); bus_unregister_notifier(&platform_bus_type, &wait.notifier); if (!err) { err = -ENODEV; - goto exit_free_clk; + goto exit_pdev_unregister; } } - pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev); - if (IS_ERR(pcdev->alloc_ctx)) { - err = PTR_ERR(pcdev->alloc_ctx); - goto exit_module_put; - } - - err = soc_camera_host_register(&pcdev->ici); - if (err) - goto exit_free_ctx; - return 0; +exit_pdev_unregister: + platform_device_del(pcdev->csi2_pdev); +exit_pdev_put: + pcdev->csi2_pdev->resource = NULL; + platform_device_put(pcdev->csi2_pdev); +exit_host_unregister: + soc_camera_host_unregister(&pcdev->ici); exit_free_ctx: vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); -exit_module_put: - if (csi2 && csi2->driver) - module_put(csi2->driver->owner); exit_free_clk: pm_runtime_disable(&pdev->dev); free_irq(pcdev->irq, pcdev); @@ -2091,7 +2147,7 @@ static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev) struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev); struct sh_mobile_ceu_dev *pcdev = container_of(soc_host, struct sh_mobile_ceu_dev, ici); - struct device *csi2 = pcdev->pdata->csi2_dev; + struct platform_device *csi2_pdev = pcdev->csi2_pdev; soc_camera_host_unregister(soc_host); pm_runtime_disable(&pdev->dev); @@ -2100,8 +2156,13 @@ static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev) dma_release_declared_memory(&pdev->dev); iounmap(pcdev->base); vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); - if (csi2 && csi2->driver) - module_put(csi2->driver->owner); + if (csi2_pdev && csi2_pdev->dev.driver) { + struct module *csi2_drv = csi2_pdev->dev.driver->owner; + platform_device_del(csi2_pdev); + csi2_pdev->resource = NULL; + platform_device_put(csi2_pdev); + module_put(csi2_drv); + } kfree(pcdev); return 0; diff --git a/drivers/media/video/sh_mobile_csi2.c b/drivers/media/video/sh_mobile_csi2.c index 98b87481fa94..2893a0134c7e 100644 --- a/drivers/media/video/sh_mobile_csi2.c +++ b/drivers/media/video/sh_mobile_csi2.c @@ -16,6 +16,7 @@ #include #include +#include #include #include #include @@ -33,7 +34,6 @@ struct sh_csi2 { struct v4l2_subdev subdev; struct list_head list; - struct notifier_block notifier; unsigned int irq; void __iomem *base; struct platform_device *pdev; @@ -132,13 +132,6 @@ static struct v4l2_subdev_video_ops sh_csi2_subdev_video_ops = { .try_mbus_fmt = sh_csi2_try_fmt, }; -static struct v4l2_subdev_core_ops sh_csi2_subdev_core_ops; - -static struct v4l2_subdev_ops sh_csi2_subdev_ops = { - .core = &sh_csi2_subdev_core_ops, - .video = &sh_csi2_subdev_video_ops, -}; - static void sh_csi2_hwinit(struct sh_csi2 *priv) { struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data; @@ -186,65 +179,84 @@ static unsigned long sh_csi2_query_bus_param(struct soc_camera_device *icd) return soc_camera_apply_sensor_flags(icl, flags); } -static int sh_csi2_notify(struct notifier_block *nb, - unsigned long action, void *data) +static int sh_csi2_client_connect(struct sh_csi2 *priv) { - struct device *dev = data; - struct soc_camera_device *icd = to_soc_camera_dev(dev); - struct v4l2_device *v4l2_dev = dev_get_drvdata(dev->parent); - struct sh_csi2 *priv = - container_of(nb, struct sh_csi2, notifier); struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data; - int ret, i; + struct v4l2_subdev *sd, *csi2_sd = &priv->subdev; + struct soc_camera_device *icd = NULL; + struct device *dev = v4l2_get_subdevdata(&priv->subdev); + int i; + + v4l2_device_for_each_subdev(sd, csi2_sd->v4l2_dev) + if (sd->grp_id) { + icd = (struct soc_camera_device *)sd->grp_id; + break; + } + + if (!icd) + return -EINVAL; for (i = 0; i < pdata->num_clients; i++) if (&pdata->clients[i].pdev->dev == icd->pdev) break; - dev_dbg(dev, "%s(%p): action = %lu, found #%d\n", __func__, dev, action, i); + dev_dbg(dev, "%s(%p): found #%d\n", __func__, dev, i); if (i == pdata->num_clients) - return NOTIFY_DONE; + return -ENODEV; - switch (action) { - case BUS_NOTIFY_BOUND_DRIVER: - snprintf(priv->subdev.name, V4L2_SUBDEV_NAME_SIZE, "%s%s", - dev_name(v4l2_dev->dev), ".mipi-csi"); - priv->subdev.grp_id = (long)icd; - ret = v4l2_device_register_subdev(v4l2_dev, &priv->subdev); - dev_dbg(dev, "%s(%p): ret(register_subdev) = %d\n", __func__, priv, ret); - if (ret < 0) - return NOTIFY_DONE; + priv->client = pdata->clients + i; - priv->client = pdata->clients + i; + priv->set_bus_param = icd->ops->set_bus_param; + priv->query_bus_param = icd->ops->query_bus_param; + icd->ops->set_bus_param = sh_csi2_set_bus_param; + icd->ops->query_bus_param = sh_csi2_query_bus_param; - priv->set_bus_param = icd->ops->set_bus_param; - priv->query_bus_param = icd->ops->query_bus_param; - icd->ops->set_bus_param = sh_csi2_set_bus_param; - icd->ops->query_bus_param = sh_csi2_query_bus_param; + csi2_sd->grp_id = (long)icd; - pm_runtime_get_sync(v4l2_get_subdevdata(&priv->subdev)); + pm_runtime_get_sync(dev); - sh_csi2_hwinit(priv); - break; - case BUS_NOTIFY_UNBIND_DRIVER: - priv->client = NULL; + sh_csi2_hwinit(priv); - /* Driver is about to be unbound */ - icd->ops->set_bus_param = priv->set_bus_param; - icd->ops->query_bus_param = priv->query_bus_param; - priv->set_bus_param = NULL; - priv->query_bus_param = NULL; + return 0; +} - v4l2_device_unregister_subdev(&priv->subdev); +static void sh_csi2_client_disconnect(struct sh_csi2 *priv) +{ + struct soc_camera_device *icd = (struct soc_camera_device *)priv->subdev.grp_id; - pm_runtime_put(v4l2_get_subdevdata(&priv->subdev)); - break; - } + priv->client = NULL; + priv->subdev.grp_id = 0; - return NOTIFY_OK; + /* Driver is about to be unbound */ + icd->ops->set_bus_param = priv->set_bus_param; + icd->ops->query_bus_param = priv->query_bus_param; + priv->set_bus_param = NULL; + priv->query_bus_param = NULL; + + pm_runtime_put(v4l2_get_subdevdata(&priv->subdev)); } +static int sh_csi2_s_power(struct v4l2_subdev *sd, int on) +{ + struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev); + + if (on) + return sh_csi2_client_connect(priv); + + sh_csi2_client_disconnect(priv); + return 0; +} + +static struct v4l2_subdev_core_ops sh_csi2_subdev_core_ops = { + .s_power = sh_csi2_s_power, +}; + +static struct v4l2_subdev_ops sh_csi2_subdev_ops = { + .core = &sh_csi2_subdev_core_ops, + .video = &sh_csi2_subdev_video_ops, +}; + static __devinit int sh_csi2_probe(struct platform_device *pdev) { struct resource *res; @@ -274,14 +286,6 @@ static __devinit int sh_csi2_probe(struct platform_device *pdev) return -ENOMEM; priv->irq = irq; - priv->notifier.notifier_call = sh_csi2_notify; - - /* We MUST attach after the MIPI sensor */ - ret = bus_register_notifier(&soc_camera_bus_type, &priv->notifier); - if (ret < 0) { - dev_err(&pdev->dev, "CSI2 cannot register notifier\n"); - goto ernotify; - } if (!request_mem_region(res->start, resource_size(res), pdev->name)) { dev_err(&pdev->dev, "CSI2 register region already claimed\n"); @@ -297,11 +301,17 @@ static __devinit int sh_csi2_probe(struct platform_device *pdev) } priv->pdev = pdev; + platform_set_drvdata(pdev, priv); v4l2_subdev_init(&priv->subdev, &sh_csi2_subdev_ops); v4l2_set_subdevdata(&priv->subdev, &pdev->dev); - platform_set_drvdata(pdev, priv); + snprintf(priv->subdev.name, V4L2_SUBDEV_NAME_SIZE, "%s.mipi-csi", + dev_name(pdata->v4l2_dev->dev)); + ret = v4l2_device_register_subdev(pdata->v4l2_dev, &priv->subdev); + dev_dbg(&pdev->dev, "%s(%p): ret(register_subdev) = %d\n", __func__, priv, ret); + if (ret < 0) + goto esdreg; pm_runtime_enable(&pdev->dev); @@ -309,11 +319,11 @@ static __devinit int sh_csi2_probe(struct platform_device *pdev) return 0; +esdreg: + iounmap(priv->base); eremap: release_mem_region(res->start, resource_size(res)); ereqreg: - bus_unregister_notifier(&soc_camera_bus_type, &priv->notifier); -ernotify: kfree(priv); return ret; @@ -324,7 +334,7 @@ static __devexit int sh_csi2_remove(struct platform_device *pdev) struct sh_csi2 *priv = platform_get_drvdata(pdev); struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - bus_unregister_notifier(&soc_camera_bus_type, &priv->notifier); + v4l2_device_unregister_subdev(&priv->subdev); pm_runtime_disable(&pdev->dev); iounmap(priv->base); release_mem_region(res->start, resource_size(res)); @@ -335,8 +345,9 @@ static __devexit int sh_csi2_remove(struct platform_device *pdev) } static struct platform_driver __refdata sh_csi2_pdrv = { - .remove = __devexit_p(sh_csi2_remove), - .driver = { + .remove = __devexit_p(sh_csi2_remove), + .probe = sh_csi2_probe, + .driver = { .name = "sh-mobile-csi2", .owner = THIS_MODULE, }, @@ -344,7 +355,7 @@ static struct platform_driver __refdata sh_csi2_pdrv = { static int __init sh_csi2_init(void) { - return platform_driver_probe(&sh_csi2_pdrv, sh_csi2_probe); + return platform_driver_register(&sh_csi2_pdrv); } static void __exit sh_csi2_exit(void) diff --git a/include/media/sh_mobile_ceu.h b/include/media/sh_mobile_ceu.h index 80346a6d28a9..48413b410f15 100644 --- a/include/media/sh_mobile_ceu.h +++ b/include/media/sh_mobile_ceu.h @@ -7,10 +7,18 @@ #define SH_CEU_FLAG_VSYNC_LOW (1 << 3) /* default High if possible */ struct device; +struct resource; + +struct sh_mobile_ceu_companion { + u32 num_resources; + struct resource *resource; + int id; + void *platform_data; +}; struct sh_mobile_ceu_info { unsigned long flags; - struct device *csi2_dev; + struct sh_mobile_ceu_companion *csi2; }; #endif /* __ASM_SH_MOBILE_CEU_H__ */ diff --git a/include/media/sh_mobile_csi2.h b/include/media/sh_mobile_csi2.h index 4d2615174461..c586c4f7f16b 100644 --- a/include/media/sh_mobile_csi2.h +++ b/include/media/sh_mobile_csi2.h @@ -11,6 +11,8 @@ #ifndef SH_MIPI_CSI #define SH_MIPI_CSI +#include + enum sh_csi2_phy { SH_CSI2_PHY_MAIN, SH_CSI2_PHY_SUB, @@ -33,14 +35,14 @@ struct sh_csi2_client_config { struct platform_device *pdev; /* client platform device */ }; +struct v4l2_device; + struct sh_csi2_pdata { enum sh_csi2_type type; unsigned int flags; struct sh_csi2_client_config *clients; int num_clients; + struct v4l2_device *v4l2_dev; }; -struct device; -struct v4l2_device; - #endif -- 2.20.1