From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965294AbcLWU4k (ORCPT ); Fri, 23 Dec 2016 15:56:40 -0500 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:40771 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753616AbcLWU4i (ORCPT ); Fri, 23 Dec 2016 15:56:38 -0500 Date: Fri, 23 Dec 2016 21:56:35 +0100 From: Pavel Machek To: Sebastian Reichel Cc: Sakari Ailus , ivo.g.dimitrov.75@gmail.com, pali.rohar@gmail.com, linux-media@vger.kernel.org, galak@codeaurora.org, mchehab@osg.samsung.com, linux-kernel@vger.kernel.org Subject: Re: [RFC/PATCH] media: Add video bus switch Message-ID: <20161223205635.GA10155@amd> References: <20161023200355.GA5391@amd> <20161119232943.GF13965@valkosipuli.retiisi.org.uk> <20161214122451.GB27011@amd> <20161222100104.GA30917@amd> <20161222133938.GA30259@amd> <20161222143244.ykza4wdxmop2t7bg@earth> <20161222224226.GB31151@amd> <20161222234028.oxntlek2oy62cjnh@earth> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="5mCyUwZo2JvN/JJP" Content-Disposition: inline In-Reply-To: <20161222234028.oxntlek2oy62cjnh@earth> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --5mCyUwZo2JvN/JJP Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi! Ok, this should be closer to something working. (But it does not work, yet). Pavel =09 diff --git a/Documentation/devicetree/bindings/media/video-bus-switch.txt b= /Documentation/devicetree/bindings/media/video-bus-switch.txt new file mode 100644 index 0000000..1b9f8e0 --- /dev/null +++ b/Documentation/devicetree/bindings/media/video-bus-switch.txt @@ -0,0 +1,63 @@ +Video Bus Switch Binding +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D + +This is a binding for a gpio controlled switch for camera interfaces. Such= a +device is used on some embedded devices to connect two cameras to the same +interface of a image signal processor. + +Required properties +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D + +compatible : must contain "video-bus-switch" +switch-gpios : GPIO specifier for the gpio, which can toggle the + selected camera. The GPIO should be configured, so + that a disabled GPIO means, that the first port is + selected. + +Required Port nodes +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D + +More documentation on these bindings is available in +video-interfaces.txt in the same directory. + +reg : The interface: + 0 - port for image signal processor + 1 - port for first camera sensor + 2 - port for second camera sensor + +Example +=3D=3D=3D=3D=3D=3D=3D + +video-bus-switch { + compatible =3D "video-bus-switch" + switch-gpios =3D <&gpio1 1 GPIO_ACTIVE_HIGH>; + + ports { + #address-cells =3D <1>; + #size-cells =3D <0>; + + port@0 { + reg =3D <0>; + + csi_switch_in: endpoint { + remote-endpoint =3D <&csi_isp>; + }; + }; + + port@1 { + reg =3D <1>; + + csi_switch_out1: endpoint { + remote-endpoint =3D <&csi_cam1>; + }; + }; + + port@2 { + reg =3D <2>; + + csi_switch_out2: endpoint { + remote-endpoint =3D <&csi_cam2>; + }; + }; + }; +}; diff --git a/arch/arm/boot/dts/omap3-n900.dts b/arch/arm/boot/dts/omap3-n90= 0.dts index 8043290..7189dfd 100644 --- a/arch/arm/boot/dts/omap3-n900.dts +++ b/arch/arm/boot/dts/omap3-n900.dts @@ -230,6 +230,15 @@ =20 csi_switch_out1: endpoint { remote-endpoint =3D <&csi_cam1>; + bus-type =3D <3>; /* CCP2 */ + clock-lanes =3D <0>; + data-lanes =3D <1>; + lane-polarity =3D <0 0>; + clock-inv =3D <0>; + /* Select strobe =3D <1> for back camera, <0> for front camera */ + strobe =3D <1>; + crc =3D <0>; + =09 }; }; =20 @@ -238,6 +247,15 @@ =20 csi_switch_out2: endpoint { remote-endpoint =3D <&csi_cam2>; + bus-type =3D <3>; /* CCP2 */ + clock-lanes =3D <0>; + data-lanes =3D <1>; + lane-polarity =3D <0 0>; + clock-inv =3D <0>; + /* Select strobe =3D <1> for back camera, <0> for front camera */ + strobe =3D <0>; + crc =3D <0>; + =09 }; }; }; diff --git a/drivers/media/platform/omap3isp/isp.c b/drivers/media/platform= /omap3isp/isp.c index 45c69ed..f0aa8cd 100644 --- a/drivers/media/platform/omap3isp/isp.c +++ b/drivers/media/platform/omap3isp/isp.c @@ -2024,44 +2054,51 @@ enum isp_of_phy { ISP_OF_PHY_CSIPHY2, }; =20 -static void isp_of_parse_node_csi1(struct device *dev, - struct isp_bus_cfg *buscfg, +void __isp_of_parse_node_csi1(struct device *dev, + struct isp_ccp2_cfg *buscfg, struct v4l2_of_endpoint *vep) { - if (vep->base.port =3D=3D ISP_OF_PHY_CSIPHY1) - buscfg->interface =3D ISP_INTERFACE_CCP2B_PHY1; - else - buscfg->interface =3D ISP_INTERFACE_CCP2B_PHY2; - buscfg->bus.ccp2.lanecfg.clk.pos =3D vep->bus.mipi_csi1.clock_lane; - buscfg->bus.ccp2.lanecfg.clk.pol =3D + buscfg->lanecfg.clk.pos =3D vep->bus.mipi_csi1.clock_lane; + buscfg->lanecfg.clk.pol =3D vep->bus.mipi_csi1.lane_polarity[0]; dev_dbg(dev, "clock lane polarity %u, pos %u\n", - buscfg->bus.ccp2.lanecfg.clk.pol, - buscfg->bus.ccp2.lanecfg.clk.pos); + buscfg->lanecfg.clk.pol, + buscfg->lanecfg.clk.pos); =20 - buscfg->bus.ccp2.lanecfg.data[0].pos =3D vep->bus.mipi_csi2.data_lanes[0]; - buscfg->bus.ccp2.lanecfg.data[0].pol =3D + buscfg->lanecfg.data[0].pos =3D vep->bus.mipi_csi2.data_lanes[0]; + buscfg->lanecfg.data[0].pol =3D vep->bus.mipi_csi2.lane_polarities[1]; dev_dbg(dev, "data lane polarity %u, pos %u\n", - buscfg->bus.ccp2.lanecfg.data[0].pol, - buscfg->bus.ccp2.lanecfg.data[0].pos); + buscfg->lanecfg.data[0].pol, + buscfg->lanecfg.data[0].pos); =20 - buscfg->bus.ccp2.strobe_clk_pol =3D vep->bus.mipi_csi1.clock_inv; - buscfg->bus.ccp2.phy_layer =3D vep->bus.mipi_csi1.strobe; - buscfg->bus.ccp2.ccp2_mode =3D vep->bus_type =3D=3D V4L2_MBUS_CCP2; + buscfg->strobe_clk_pol =3D vep->bus.mipi_csi1.clock_inv; + buscfg->phy_layer =3D vep->bus.mipi_csi1.strobe; + buscfg->ccp2_mode =3D vep->bus_type =3D=3D V4L2_MBUS_CCP2; =20 dev_dbg(dev, "clock_inv %u strobe %u ccp2 %u\n", - buscfg->bus.ccp2.strobe_clk_pol, - buscfg->bus.ccp2.phy_layer, - buscfg->bus.ccp2.ccp2_mode); + buscfg->strobe_clk_pol, + buscfg->phy_layer, + buscfg->ccp2_mode); /* * FIXME: now we assume the CRC is always there. * Implement a way to obtain this information from the * sensor. Frame descriptors, perhaps? */ - buscfg->bus.ccp2.crc =3D 1; + buscfg->crc =3D 1; =20 - buscfg->bus.ccp2.vp_clk_pol =3D 1; + buscfg->vp_clk_pol =3D 1; +} +=09 +static void isp_of_parse_node_csi1(struct device *dev, + struct isp_bus_cfg *buscfg, + struct v4l2_of_endpoint *vep) +{ + if (vep->base.port =3D=3D ISP_OF_PHY_CSIPHY1) + buscfg->interface =3D ISP_INTERFACE_CCP2B_PHY1; + else + buscfg->interface =3D ISP_INTERFACE_CCP2B_PHY2; + __isp_of_parse_node_csi1(dev, &buscfg->bus.ccp2, vep); } =20 static void isp_of_parse_node_csi2(struct device *dev, @@ -2099,27 +2136,8 @@ static void isp_of_parse_node_csi2(struct device *de= v, buscfg->bus.csi2.crc =3D 1; } =20 -static int isp_of_parse_node_endpoint(struct device *dev, - struct device_node *node, - struct isp_async_subdev *isd) +static int isp_endpoint_to_buscfg(struct device *dev, struct v4l2_of_endpo= int vep, struct isp_bus_cfg *buscfg) { - struct isp_bus_cfg *buscfg; - struct v4l2_of_endpoint vep; - int ret; - - isd->bus =3D devm_kzalloc(dev, sizeof(*isd->bus), GFP_KERNEL); - if (!isd->bus) - return -ENOMEM; - - buscfg =3D isd->bus; - - ret =3D v4l2_of_parse_endpoint(node, &vep); - if (ret) - return ret; - - dev_dbg(dev, "parsing endpoint %s, interface %u\n", node->full_name, - vep.base.port); - switch (vep.base.port) { case ISP_OF_PHY_PARALLEL: buscfg->interface =3D ISP_INTERFACE_PARALLEL; @@ -2147,10 +2165,35 @@ static int isp_of_parse_node_endpoint(struct device= *dev, break; =20 default: + return -1; + } + return 0; +} + +static int isp_of_parse_node_endpoint(struct device *dev, + struct device_node *node, + struct isp_async_subdev *isd) +{ + struct isp_bus_cfg *buscfg; + struct v4l2_of_endpoint vep; + int ret; + + isd->bus =3D devm_kzalloc(dev, sizeof(*isd->bus), GFP_KERNEL); + if (!isd->bus) + return -ENOMEM; + + buscfg =3D isd->bus; + + ret =3D v4l2_of_parse_endpoint(node, &vep); + if (ret) + return ret; + + dev_dbg(dev, "parsing endpoint %s, interface %u\n", node->full_name, + vep.base.port); + + if (isp_endpoint_to_buscfg(dev, vep, buscfg)) dev_warn(dev, "%s: invalid interface %u\n", node->full_name, vep.base.port); - break; - } =20 return 0; } @@ -2262,6 +2305,10 @@ static int isp_of_parse_nodes(struct device *dev, } =20 return notifier->num_subdevs; + +error: + of_node_put(node); + return -EINVAL; } =20 static int isp_subdev_notifier_bound(struct v4l2_async_notifier *async, diff --git a/drivers/media/platform/omap3isp/ispccp2.c b/drivers/media/plat= form/omap3isp/ispccp2.c index 2d1463a..d5df576 100644 --- a/drivers/media/platform/omap3isp/ispccp2.c +++ b/drivers/media/platform/omap3isp/ispccp2.c @@ -23,6 +23,8 @@ #include #include =20 +#include + #include "isp.h" #include "ispreg.h" #include "ispccp2.h" @@ -169,6 +171,7 @@ static int ccp2_if_enable(struct isp_ccp2_device *ccp2,= u8 enable) =20 pad =3D media_entity_remote_pad(&ccp2->pads[CCP2_PAD_SINK]); sensor =3D media_entity_to_v4l2_subdev(pad->entity); + /* Struct isp_bus_cfg has union inside */=20 buscfg =3D &((struct isp_bus_cfg *)sensor->host_priv)->bus.ccp2; =20 =20 @@ -369,6 +372,9 @@ static void ccp2_lcx_config(struct isp_ccp2_device *ccp= 2, isp_reg_set(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_LC01_IRQENABLE, val); } =20 +void __isp_of_parse_node_csi1(struct device *dev, + struct isp_ccp2_cfg *buscfg, + struct v4l2_of_endpoint *vep); /* * ccp2_if_configure - Configure ccp2 with data from sensor * @ccp2: Pointer to ISP CCP2 device @@ -377,7 +383,7 @@ static void ccp2_lcx_config(struct isp_ccp2_device *ccp= 2, */ static int ccp2_if_configure(struct isp_ccp2_device *ccp2) { - const struct isp_bus_cfg *buscfg; + struct isp_bus_cfg *buscfg; struct v4l2_mbus_framefmt *format; struct media_pad *pad; struct v4l2_subdev *sensor; @@ -390,6 +396,22 @@ static int ccp2_if_configure(struct isp_ccp2_device *c= cp2) sensor =3D media_entity_to_v4l2_subdev(pad->entity); buscfg =3D sensor->host_priv; =20 + { + struct v4l2_subdev *subdev2; + struct v4l2_of_endpoint vep; + =09 + subdev2 =3D media_entity_to_v4l2_subdev(pad->entity); + + printk("if_configure... subdev %p\n", subdev2); + ret =3D v4l2_subdev_call(subdev2, video, g_endpoint_config, &vep); + printk("if_configure ret %d\n", ret); + if (ret =3D=3D 0) { + printk("Success: have configuration\n"); + __isp_of_parse_node_csi1(NULL, &buscfg->bus.ccp2, &vep); + printk("Configured ok?\n"); + } + } + ret =3D ccp2_phyif_config(ccp2, &buscfg->bus.ccp2); if (ret < 0) return ret; diff --git a/drivers/media/platform/video-bus-switch.c b/drivers/media/plat= form/video-bus-switch.c index 1a5d944..f599e08 100644 --- a/drivers/media/platform/video-bus-switch.c +++ b/drivers/media/platform/video-bus-switch.c @@ -2,6 +2,7 @@ * Generic driver for video bus switches * * Copyright (C) 2015 Sebastian Reichel + * Copyright (C) 2016 Pavel Machek * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License @@ -33,9 +34,9 @@ #define CSI_SWITCH_PORTS 3 =20 enum vbs_state { - CSI_SWITCH_DISABLED, - CSI_SWITCH_PORT_1, - CSI_SWITCH_PORT_2, + CSI_SWITCH_DISABLED =3D 0, + CSI_SWITCH_PORT_1 =3D 1, + CSI_SWITCH_PORT_2 =3D 2, }; =20 struct vbs_src_pads { @@ -49,6 +50,7 @@ struct vbs_data { struct v4l2_async_notifier notifier; struct media_pad pads[CSI_SWITCH_PORTS]; struct vbs_src_pads src_pads[CSI_SWITCH_PORTS]; + struct v4l2_of_endpoint vep[CSI_SWITCH_PORTS]; enum vbs_state state; }; =20 @@ -107,6 +109,7 @@ static int vbs_of_parse_nodes(struct device *dev, struc= t vbs_data *pdata) } =20 ssd->asd.match_type =3D V4L2_ASYNC_MATCH_OF; + pdata->vep[notifier->num_subdevs] =3D vep; notifier->num_subdevs++; } =20 @@ -253,6 +256,19 @@ static int vbs_s_stream(struct v4l2_subdev *sd, int en= able) return v4l2_subdev_call(subdev, video, s_stream, enable); } =20 +static int vbs_g_endpoint_config(struct v4l2_subdev *sd, struct v4l2_of_en= dpoint *cfg) +{ + struct vbs_data *pdata =3D v4l2_get_subdevdata(sd); + printk("vbs_g_endpoint_config...\n"); + printk("active port is %d\n", pdata->state); + *cfg =3D pdata->vep[pdata->state]; + + return -EINVAL; + + return 0; +} + + static const struct v4l2_subdev_internal_ops vbs_internal_ops =3D { .registered =3D &vbs_registered, }; @@ -265,6 +281,7 @@ static const struct media_entity_operations vbs_media_o= ps =3D { /* subdev video operations */ static const struct v4l2_subdev_video_ops vbs_video_ops =3D { .s_stream =3D vbs_s_stream, + .g_endpoint_config =3D vbs_g_endpoint_config, }; =20 static const struct v4l2_subdev_ops vbs_ops =3D { diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index cf778c5..448dbb5 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -25,6 +25,7 @@ #include #include #include +#include =20 /* generic v4l2_device notify callback notification values */ #define V4L2_SUBDEV_IR_RX_NOTIFY _IOW('v', 0, u32) @@ -415,6 +416,8 @@ struct v4l2_subdev_video_ops { const struct v4l2_mbus_config *cfg); int (*s_rx_buffer)(struct v4l2_subdev *sd, void *buf, unsigned int *size); + int (*g_endpoint_config)(struct v4l2_subdev *sd, + struct v4l2_of_endpoint *cfg); }; =20 /** --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --5mCyUwZo2JvN/JJP Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlhdj4MACgkQMOfwapXb+vIWyACfWE6sPye7S6kdP0yK7eo1gCDV 15cAn0RHWzCJD6GE1BO+DRy2VzskJZoK =lleB -----END PGP SIGNATURE----- --5mCyUwZo2JvN/JJP--