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[73.202.231.77]) by smtp.googlemail.com with ESMTPSA id q4sm11802751pfl.175.2020.02.15.11.42.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 15 Feb 2020 11:42:03 -0800 (PST) From: Steve Longerbeam To: linux-media@vger.kernel.org Subject: [RESEND PATCH v3 02/17] media: v4l2-fwnode: Pass notifier to v4l2_async_register_fwnode_subdev() Date: Sat, 15 Feb 2020 11:41:21 -0800 Message-Id: <20200215194136.10131-3-slongerbeam@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200215194136.10131-1-slongerbeam@gmail.com> References: <20200215194136.10131-1-slongerbeam@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200215_114205_739893_B98AE61A X-CRM114-Status: GOOD ( 19.01 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:641 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider [slongerbeam[at]gmail.com] 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "open list:STAGING SUBSYSTEM" , Fabio Estevam , Pengutronix Kernel Team , Greg Kroah-Hartman , Sascha Hauer , open list , Sakari Ailus , Rui Miguel Silva , NXP Linux Team , Philipp Zabel , Steve Longerbeam , Hans Verkuil , Thomas Gleixner , Mauro Carvalho Chehab , Shawn Guo , "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Instead of allocating a notifier in v4l2_async_register_fwnode_subdev(), have the caller provide one. This allows the caller to implement notifier ops (bind, unbind). The caller is now responsible for first initializing its notifier with a call to v4l2_async_notifier_init(). Signed-off-by: Steve Longerbeam --- Changes in v3: - added the missing calls to unregister/cleanup the new subdev notifiers. Reported by Rui Silva. --- drivers/media/platform/video-mux.c | 8 +++++++- drivers/media/v4l2-core/v4l2-fwnode.c | 11 +---------- drivers/staging/media/imx/imx6-mipi-csi2.c | 7 ++++++- drivers/staging/media/imx/imx7-media-csi.c | 7 ++++++- drivers/staging/media/imx/imx7-mipi-csis.c | 9 ++++++++- include/media/v4l2-fwnode.h | 12 ++++++++---- 6 files changed, 36 insertions(+), 18 deletions(-) diff --git a/drivers/media/platform/video-mux.c b/drivers/media/platform/video-mux.c index ddd0e338f9e4..3d2a5c2b4c08 100644 --- a/drivers/media/platform/video-mux.c +++ b/drivers/media/platform/video-mux.c @@ -21,6 +21,7 @@ struct video_mux { struct v4l2_subdev subdev; + struct v4l2_async_notifier notifier; struct media_pad *pads; struct v4l2_mbus_framefmt *format_mbus; struct mux_control *mux; @@ -354,8 +355,11 @@ static int video_mux_async_register(struct video_mux *vmux, for (i = 0; i < num_input_pads; i++) ports[i] = i; + v4l2_async_notifier_init(&vmux->notifier); + ret = v4l2_async_register_fwnode_subdev( - &vmux->subdev, sizeof(struct v4l2_async_subdev), + &vmux->subdev, &vmux->notifier, + sizeof(struct v4l2_async_subdev), ports, num_input_pads, video_mux_parse_endpoint); kfree(ports); @@ -442,6 +446,8 @@ static int video_mux_remove(struct platform_device *pdev) struct video_mux *vmux = platform_get_drvdata(pdev); struct v4l2_subdev *sd = &vmux->subdev; + v4l2_async_notifier_unregister(&vmux->notifier); + v4l2_async_notifier_cleanup(&vmux->notifier); v4l2_async_unregister_subdev(sd); media_entity_cleanup(&sd->entity); diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c index 6ece4320e1d2..ae2cc4d6faf6 100644 --- a/drivers/media/v4l2-core/v4l2-fwnode.c +++ b/drivers/media/v4l2-core/v4l2-fwnode.c @@ -1164,12 +1164,12 @@ int v4l2_async_register_subdev_sensor_common(struct v4l2_subdev *sd) EXPORT_SYMBOL_GPL(v4l2_async_register_subdev_sensor_common); int v4l2_async_register_fwnode_subdev(struct v4l2_subdev *sd, + struct v4l2_async_notifier *notifier, size_t asd_struct_size, unsigned int *ports, unsigned int num_ports, parse_endpoint_func parse_endpoint) { - struct v4l2_async_notifier *notifier; struct device *dev = sd->dev; struct fwnode_handle *fwnode; int ret; @@ -1181,12 +1181,6 @@ int v4l2_async_register_fwnode_subdev(struct v4l2_subdev *sd, if (!fwnode_device_is_available(fwnode)) return -ENODEV; - notifier = kzalloc(sizeof(*notifier), GFP_KERNEL); - if (!notifier) - return -ENOMEM; - - v4l2_async_notifier_init(notifier); - if (!ports) { ret = v4l2_async_notifier_parse_fwnode_endpoints(dev, notifier, asd_struct_size, @@ -1211,15 +1205,12 @@ int v4l2_async_register_fwnode_subdev(struct v4l2_subdev *sd, if (ret < 0) goto out_unregister; - sd->subdev_notifier = notifier; - return 0; out_unregister: v4l2_async_notifier_unregister(notifier); out_cleanup: v4l2_async_notifier_cleanup(notifier); - kfree(notifier); return ret; } diff --git a/drivers/staging/media/imx/imx6-mipi-csi2.c b/drivers/staging/media/imx/imx6-mipi-csi2.c index cd3dd6e33ef0..c1d1afeea53a 100644 --- a/drivers/staging/media/imx/imx6-mipi-csi2.c +++ b/drivers/staging/media/imx/imx6-mipi-csi2.c @@ -35,6 +35,7 @@ struct csi2_dev { struct device *dev; struct v4l2_subdev sd; + struct v4l2_async_notifier notifier; struct media_pad pad[CSI2_NUM_PADS]; struct clk *dphy_clk; struct clk *pllref_clk; @@ -636,8 +637,10 @@ static int csi2_probe(struct platform_device *pdev) platform_set_drvdata(pdev, &csi2->sd); + v4l2_async_notifier_init(&csi2->notifier); + ret = v4l2_async_register_fwnode_subdev( - &csi2->sd, sizeof(struct v4l2_async_subdev), + &csi2->sd, &csi2->notifier, sizeof(struct v4l2_async_subdev), &sink_port, 1, csi2_parse_endpoint); if (ret) goto dphy_off; @@ -658,6 +661,8 @@ static int csi2_remove(struct platform_device *pdev) struct v4l2_subdev *sd = platform_get_drvdata(pdev); struct csi2_dev *csi2 = sd_to_dev(sd); + v4l2_async_notifier_unregister(&csi2->notifier); + v4l2_async_notifier_cleanup(&csi2->notifier); v4l2_async_unregister_subdev(sd); clk_disable_unprepare(csi2->dphy_clk); clk_disable_unprepare(csi2->pllref_clk); diff --git a/drivers/staging/media/imx/imx7-media-csi.c b/drivers/staging/media/imx/imx7-media-csi.c index db30e2c70f2f..dc6d1a28fde7 100644 --- a/drivers/staging/media/imx/imx7-media-csi.c +++ b/drivers/staging/media/imx/imx7-media-csi.c @@ -155,6 +155,7 @@ struct imx7_csi { struct device *dev; struct v4l2_subdev sd; + struct v4l2_async_notifier notifier; struct imx_media_video_dev *vdev; struct imx_media_dev *imxmd; struct media_pad pad[IMX7_CSI_PADS_NUM]; @@ -1266,7 +1267,9 @@ static int imx7_csi_probe(struct platform_device *pdev) if (ret < 0) goto free; - ret = v4l2_async_register_fwnode_subdev(&csi->sd, + v4l2_async_notifier_init(&csi->notifier); + + ret = v4l2_async_register_fwnode_subdev(&csi->sd, &csi->notifier, sizeof(struct v4l2_async_subdev), NULL, 0, imx7_csi_parse_endpoint); @@ -1303,6 +1306,8 @@ static int imx7_csi_remove(struct platform_device *pdev) v4l2_device_unregister(&imxmd->v4l2_dev); media_device_cleanup(&imxmd->md); + v4l2_async_notifier_unregister(&csi->notifier); + v4l2_async_notifier_cleanup(&csi->notifier); v4l2_async_unregister_subdev(sd); v4l2_ctrl_handler_free(&csi->ctrl_hdlr); diff --git a/drivers/staging/media/imx/imx7-mipi-csis.c b/drivers/staging/media/imx/imx7-mipi-csis.c index 383abecb3bec..4c54456318ea 100644 --- a/drivers/staging/media/imx/imx7-mipi-csis.c +++ b/drivers/staging/media/imx/imx7-mipi-csis.c @@ -223,6 +223,7 @@ struct csi_state { struct device *dev; struct media_pad pads[CSIS_PADS_NUM]; struct v4l2_subdev mipi_sd; + struct v4l2_async_notifier notifier; struct v4l2_subdev *src_sd; u8 index; @@ -883,7 +884,9 @@ static int mipi_csis_subdev_init(struct v4l2_subdev *mipi_sd, if (ret) return ret; - ret = v4l2_async_register_fwnode_subdev(mipi_sd, + v4l2_async_notifier_init(&state->notifier); + + ret = v4l2_async_register_fwnode_subdev(mipi_sd, &state->notifier, sizeof(struct v4l2_async_subdev), &sink_port, 1, mipi_csis_parse_endpoint); @@ -1014,6 +1017,8 @@ static int mipi_csis_probe(struct platform_device *pdev) unregister_all: mipi_csis_debugfs_exit(state); media_entity_cleanup(&state->mipi_sd.entity); + v4l2_async_notifier_unregister(&state->notifier); + v4l2_async_notifier_cleanup(&state->notifier); v4l2_async_unregister_subdev(&state->mipi_sd); disable_clock: mipi_csis_clk_disable(state); @@ -1101,6 +1106,8 @@ static int mipi_csis_remove(struct platform_device *pdev) struct csi_state *state = mipi_sd_to_csis_state(mipi_sd); mipi_csis_debugfs_exit(state); + v4l2_async_notifier_unregister(&state->notifier); + v4l2_async_notifier_cleanup(&state->notifier); v4l2_async_unregister_subdev(&state->mipi_sd); pm_runtime_disable(&pdev->dev); diff --git a/include/media/v4l2-fwnode.h b/include/media/v4l2-fwnode.h index f6a7bcd13197..b2b61e6c3769 100644 --- a/include/media/v4l2-fwnode.h +++ b/include/media/v4l2-fwnode.h @@ -375,6 +375,7 @@ int v4l2_async_notifier_parse_fwnode_sensor_common(struct device *dev, * and parses fwnode endpoints * * @sd: pointer to struct &v4l2_subdev + * @notifier: the sub-device's notifier. * @asd_struct_size: size of the driver's async sub-device struct, including * sizeof(struct v4l2_async_subdev). The &struct * v4l2_async_subdev shall be the first member of @@ -387,13 +388,15 @@ int v4l2_async_notifier_parse_fwnode_sensor_common(struct device *dev, * endpoint. Optional. * * This function is just like v4l2_async_register_subdev() with the - * exception that calling it will also allocate a notifier for the - * sub-device, parse the sub-device's firmware node endpoints using - * v4l2_async_notifier_parse_fwnode_endpoints() or + * exception that calling it will also parse the sub-device's firmware + * node endpoints using v4l2_async_notifier_parse_fwnode_endpoints() or * v4l2_async_notifier_parse_fwnode_endpoints_by_port(), and - * registers the sub-device notifier. The sub-device is similarly + * registers the sub-device's notifier. The sub-device is similarly * unregistered by calling v4l2_async_unregister_subdev(). * + * The caller must first initialize the notifier with a call to + * v4l2_async_notifier_init(). + * * While registered, the subdev module is marked as in-use. * * An error is returned if the module is no longer loaded on any attempts @@ -401,6 +404,7 @@ int v4l2_async_notifier_parse_fwnode_sensor_common(struct device *dev, */ int v4l2_async_register_fwnode_subdev(struct v4l2_subdev *sd, + struct v4l2_async_notifier *notifier, size_t asd_struct_size, unsigned int *ports, unsigned int num_ports,