[v3,07/23] v4l: fwnode: Let the caller provide V4L2 fwnode endpoint

Message ID	20180912212942.19641-8-sakari.ailus@linux.intel.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <dri-devel-bounces@lists.freedesktop.org> From: Sakari Ailus <sakari.ailus@linux.intel.com> To: linux-media@vger.kernel.org Subject: [PATCH v3 07/23] v4l: fwnode: Let the caller provide V4L2 fwnode endpoint Date: Thu, 13 Sep 2018 00:29:26 +0300 Message-Id: <20180912212942.19641-8-sakari.ailus@linux.intel.com> In-Reply-To: <20180912212942.19641-1-sakari.ailus@linux.intel.com> References: <20180912212942.19641-1-sakari.ailus@linux.intel.com> Precedence: list Cc: devicetree@vger.kernel.org, jacopo@jmondi.org, dri-devel@lists.freedesktop.org, slongerbeam@gmail.com, niklas.soderlund@ragnatech.se MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" <dri-devel-bounces@lists.freedesktop.org>
Series	V4L2 fwnode rework; support for default configuration \| expand [v3,00/23] V4L2 fwnode rework; support for default configuration [v3,01/23] v4l: fwnode: Add debug prints for V4L2 endpoint property parsing [v3,02/23] v4l: fwnode: Use fwnode_graph_for_each_endpoint [v3,03/23] v4l: fwnode: The CSI-2 clock is continuous if it's not non-continuous [v3,04/23] dt-bindings: media: Specify bus type for MIPI D-PHY, others, explicitly [v3,05/23] v4l: fwnode: Add definitions for CSI-2 D-PHY, parallel and Bt.656 busses [v3,06/23] v4l: mediabus: Recognise CSI-2 D-PHY and C-PHY [v3,07/23] v4l: fwnode: Let the caller provide V4L2 fwnode endpoint [v3,08/23] v4l: fwnode: Detect bus type correctly [v3,09/23] v4l: fwnode: Make use of newly specified bus types [v3,10/23] v4l: fwnode: Read lane inversion information despite lane numbering [v3,11/23] v4l: fwnode: Only assign configuration if there is no error [v3,12/23] v4l: fwnode: Support driver-defined lane mapping defaults [v3,13/23] v4l: fwnode: Support default CSI-2 lane mapping for drivers [v3,14/23] v4l: fwnode: Parse the graph endpoint as last [v3,15/23] v4l: fwnode: Use default parallel flags [v3,16/23] v4l: fwnode: Initialise the V4L2 fwnode endpoints to zero [v3,17/23] v4l: fwnode: Only zero the struct if bus type is set to V4L2_MBUS_UNKNOWN [v3,18/23] v4l: fwnode: Use media bus type for bus parser selection [v3,19/23] v4l: fwnode: Print bus type [v3,20/23] v4l: fwnode: Use V4L2 fwnode endpoint media bus type if set [v3,21/23] v4l: fwnode: Support parsing of CSI-2 C-PHY endpoints [v3,22/23] v4l: fwnode: Update V4L2 fwnode endpoint parsing documentation [v3,23/23] smiapp: Query the V4L2 endpoint for a specific bus type

diff --git a/drivers/media/i2c/ov2659.c b/drivers/media/i2c/ov2659.c index 4715edc8ca33..799acce803fe 100644 --- a/drivers/media/i2c/ov2659.c +++ b/drivers/media/i2c/ov2659.c @@ -1347,8 +1347,9 @@ static struct ov2659_platform_data * ov2659_get_pdata(struct i2c_client *client) { struct ov2659_platform_data *pdata; - struct v4l2_fwnode_endpoint *bus_cfg; + struct v4l2_fwnode_endpoint bus_cfg = { .bus_type = 0 }; struct device_node *endpoint; + int ret; if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node) return client->dev.platform_data; @@ -1357,8 +1358,9 @@ ov2659_get_pdata(struct i2c_client *client) if (!endpoint) return NULL; - bus_cfg = v4l2_fwnode_endpoint_alloc_parse(of_fwnode_handle(endpoint)); - if (IS_ERR(bus_cfg)) { + ret = v4l2_fwnode_endpoint_alloc_parse(of_fwnode_handle(endpoint), + &bus_cfg); + if (ret) { pdata = NULL; goto done; } @@ -1367,17 +1369,17 @@ ov2659_get_pdata(struct i2c_client *client) if (!pdata) goto done; - if (!bus_cfg->nr_of_link_frequencies) { + if (!bus_cfg.nr_of_link_frequencies) { dev_err(&client->dev, "link-frequencies property not found or too many\n"); pdata = NULL; goto done; } - pdata->link_frequency = bus_cfg->link_frequencies[0]; + pdata->link_frequency = bus_cfg.link_frequencies[0]; done: - v4l2_fwnode_endpoint_free(bus_cfg); + v4l2_fwnode_endpoint_free(&bus_cfg); of_node_put(endpoint); return pdata; } diff --git a/drivers/media/i2c/smiapp/smiapp-core.c b/drivers/media/i2c/smiapp/smiapp-core.c index 9e33c2008ba6..048ab6cfaa97 100644 --- a/drivers/media/i2c/smiapp/smiapp-core.c +++ b/drivers/media/i2c/smiapp/smiapp-core.c @@ -2761,7 +2761,7 @@ static int __maybe_unused smiapp_resume(struct device *dev) static struct smiapp_hwconfig *smiapp_get_hwconfig(struct device *dev) { struct smiapp_hwconfig *hwcfg; - struct v4l2_fwnode_endpoint *bus_cfg; + struct v4l2_fwnode_endpoint bus_cfg = { .bus_type = 0 }; struct fwnode_handle *ep; struct fwnode_handle *fwnode = dev_fwnode(dev); u32 rotation; @@ -2775,27 +2775,27 @@ static struct smiapp_hwconfig *smiapp_get_hwconfig(struct device *dev) if (!ep) return NULL; - bus_cfg = v4l2_fwnode_endpoint_alloc_parse(ep); - if (IS_ERR(bus_cfg)) + rval = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg); + if (rval) goto out_err; hwcfg = devm_kzalloc(dev, sizeof(*hwcfg), GFP_KERNEL); if (!hwcfg) goto out_err; - switch (bus_cfg->bus_type) { + switch (bus_cfg.bus_type) { case V4L2_MBUS_CSI2_DPHY: hwcfg->csi_signalling_mode = SMIAPP_CSI_SIGNALLING_MODE_CSI2; - hwcfg->lanes = bus_cfg->bus.mipi_csi2.num_data_lanes; + hwcfg->lanes = bus_cfg.bus.mipi_csi2.num_data_lanes; break; case V4L2_MBUS_CCP2: - hwcfg->csi_signalling_mode = (bus_cfg->bus.mipi_csi1.strobe) ? + hwcfg->csi_signalling_mode = (bus_cfg.bus.mipi_csi1.strobe) ? SMIAPP_CSI_SIGNALLING_MODE_CCP2_DATA_STROBE : SMIAPP_CSI_SIGNALLING_MODE_CCP2_DATA_CLOCK; hwcfg->lanes = 1; break; default: - dev_err(dev, "unsupported bus %u\n", bus_cfg->bus_type); + dev_err(dev, "unsupported bus %u\n", bus_cfg.bus_type); goto out_err; } @@ -2827,28 +2827,28 @@ static struct smiapp_hwconfig *smiapp_get_hwconfig(struct device *dev) dev_dbg(dev, "nvm %d, clk %d, mode %d\n", hwcfg->nvm_size, hwcfg->ext_clk, hwcfg->csi_signalling_mode); - if (!bus_cfg->nr_of_link_frequencies) { + if (!bus_cfg.nr_of_link_frequencies) { dev_warn(dev, "no link frequencies defined\n"); goto out_err; } hwcfg->op_sys_clock = devm_kcalloc( - dev, bus_cfg->nr_of_link_frequencies + 1 /* guardian */, + dev, bus_cfg.nr_of_link_frequencies + 1 /* guardian */, sizeof(*hwcfg->op_sys_clock), GFP_KERNEL); if (!hwcfg->op_sys_clock) goto out_err; - for (i = 0; i < bus_cfg->nr_of_link_frequencies; i++) { - hwcfg->op_sys_clock[i] = bus_cfg->link_frequencies[i]; + for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++) { + hwcfg->op_sys_clock[i] = bus_cfg.link_frequencies[i]; dev_dbg(dev, "freq %d: %lld\n", i, hwcfg->op_sys_clock[i]); } - v4l2_fwnode_endpoint_free(bus_cfg); + v4l2_fwnode_endpoint_free(&bus_cfg); fwnode_handle_put(ep); return hwcfg; out_err: - v4l2_fwnode_endpoint_free(bus_cfg); + v4l2_fwnode_endpoint_free(&bus_cfg); fwnode_handle_put(ep); return NULL; } diff --git a/drivers/media/i2c/tc358743.c b/drivers/media/i2c/tc358743.c index 6a2064597124..8402d540eb8c 100644 --- a/drivers/media/i2c/tc358743.c +++ b/drivers/media/i2c/tc358743.c @@ -1895,11 +1895,11 @@ static void tc358743_gpio_reset(struct tc358743_state *state) static int tc358743_probe_of(struct tc358743_state *state) { struct device *dev = &state->i2c_client->dev; - struct v4l2_fwnode_endpoint *endpoint; + struct v4l2_fwnode_endpoint endpoint = { .bus_type = 0 }; struct device_node *ep; struct clk *refclk; u32 bps_pr_lane; - int ret = -EINVAL; + int ret; refclk = devm_clk_get(dev, "refclk"); if (IS_ERR(refclk)) { @@ -1915,26 +1915,28 @@ static int tc358743_probe_of(struct tc358743_state *state) return -EINVAL; } - endpoint = v4l2_fwnode_endpoint_alloc_parse(of_fwnode_handle(ep)); - if (IS_ERR(endpoint)) { + ret = v4l2_fwnode_endpoint_alloc_parse(of_fwnode_handle(ep), &endpoint); + if (ret) { dev_err(dev, "failed to parse endpoint\n"); - ret = PTR_ERR(endpoint); + ret = ret; goto put_node; } - if (endpoint->bus_type != V4L2_MBUS_CSI2_DPHY || - endpoint->bus.mipi_csi2.num_data_lanes == 0 || - endpoint->nr_of_link_frequencies == 0) { + if (endpoint.bus_type != V4L2_MBUS_CSI2_DPHY || + endpoint.bus.mipi_csi2.num_data_lanes == 0 || + endpoint.nr_of_link_frequencies == 0) { dev_err(dev, "missing CSI-2 properties in endpoint\n"); + ret = -EINVAL; goto free_endpoint; } - if (endpoint->bus.mipi_csi2.num_data_lanes > 4) { + if (endpoint.bus.mipi_csi2.num_data_lanes > 4) { dev_err(dev, "invalid number of lanes\n"); + ret = -EINVAL; goto free_endpoint; } - state->bus = endpoint->bus.mipi_csi2; + state->bus = endpoint.bus.mipi_csi2; ret = clk_prepare_enable(refclk); if (ret) { @@ -1967,7 +1969,7 @@ static int tc358743_probe_of(struct tc358743_state *state) * The CSI bps per lane must be between 62.5 Mbps and 1 Gbps. * The default is 594 Mbps for 4-lane 1080p60 or 2-lane 720p60. */ - bps_pr_lane = 2 * endpoint->link_frequencies[0]; + bps_pr_lane = 2 * endpoint.link_frequencies[0]; if (bps_pr_lane < 62500000U || bps_pr_lane > 1000000000U) { dev_err(dev, "unsupported bps per lane: %u bps\n", bps_pr_lane); goto disable_clk; @@ -2013,7 +2015,7 @@ static int tc358743_probe_of(struct tc358743_state *state) disable_clk: clk_disable_unprepare(refclk); free_endpoint: - v4l2_fwnode_endpoint_free(endpoint); + v4l2_fwnode_endpoint_free(&endpoint); put_node: of_node_put(ep); return ret; diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c index 54162217bb36..d6ba3e5d4356 100644 --- a/drivers/media/v4l2-core/v4l2-fwnode.c +++ b/drivers/media/v4l2-core/v4l2-fwnode.c @@ -290,23 +290,17 @@ void v4l2_fwnode_endpoint_free(struct v4l2_fwnode_endpoint *vep) return; kfree(vep->link_frequencies); - kfree(vep); } EXPORT_SYMBOL_GPL(v4l2_fwnode_endpoint_free); -struct v4l2_fwnode_endpoint *v4l2_fwnode_endpoint_alloc_parse( - struct fwnode_handle *fwnode) +int v4l2_fwnode_endpoint_alloc_parse( + struct fwnode_handle *fwnode, struct v4l2_fwnode_endpoint *vep) { - struct v4l2_fwnode_endpoint *vep; int rval; - vep = kzalloc(sizeof(*vep), GFP_KERNEL); - if (!vep) - return ERR_PTR(-ENOMEM); - rval = __v4l2_fwnode_endpoint_parse(fwnode, vep); if (rval < 0) - goto out_err; + return rval; rval = fwnode_property_read_u64_array(fwnode, "link-frequencies", NULL, 0); @@ -316,18 +310,18 @@ struct v4l2_fwnode_endpoint *v4l2_fwnode_endpoint_alloc_parse( vep->link_frequencies = kmalloc_array(rval, sizeof(*vep->link_frequencies), GFP_KERNEL); - if (!vep->link_frequencies) { - rval = -ENOMEM; - goto out_err; - } + if (!vep->link_frequencies) + return -ENOMEM; vep->nr_of_link_frequencies = rval; rval = fwnode_property_read_u64_array( fwnode, "link-frequencies", vep->link_frequencies, vep->nr_of_link_frequencies); - if (rval < 0) - goto out_err; + if (rval < 0) { + v4l2_fwnode_endpoint_free(vep); + return rval; + } for (i = 0; i < vep->nr_of_link_frequencies; i++) pr_info("link-frequencies %u value %llu\n", i, @@ -336,11 +330,7 @@ struct v4l2_fwnode_endpoint *v4l2_fwnode_endpoint_alloc_parse( pr_debug("===== end V4L2 endpoint properties\n"); - return vep; - -out_err: - v4l2_fwnode_endpoint_free(vep); - return ERR_PTR(rval); + return 0; } EXPORT_SYMBOL_GPL(v4l2_fwnode_endpoint_alloc_parse); @@ -392,9 +382,9 @@ static int v4l2_async_notifier_fwnode_parse_endpoint( struct v4l2_fwnode_endpoint *vep, struct v4l2_async_subdev *asd)) { + struct v4l2_fwnode_endpoint vep = { .bus_type = 0 }; struct v4l2_async_subdev *asd; - struct v4l2_fwnode_endpoint *vep; - int ret = 0; + int ret; asd = kzalloc(asd_struct_size, GFP_KERNEL); if (!asd) @@ -409,23 +399,22 @@ static int v4l2_async_notifier_fwnode_parse_endpoint( goto out_err; } - vep = v4l2_fwnode_endpoint_alloc_parse(endpoint); - if (IS_ERR(vep)) { - ret = PTR_ERR(vep); + ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &vep); + if (ret) { dev_warn(dev, "unable to parse V4L2 fwnode endpoint (%d)\n", ret); goto out_err; } - ret = parse_endpoint ? parse_endpoint(dev, vep, asd) : 0; + ret = parse_endpoint ? parse_endpoint(dev, &vep, asd) : 0; if (ret == -ENOTCONN) - dev_dbg(dev, "ignoring port@%u/endpoint@%u\n", vep->base.port, - vep->base.id); + dev_dbg(dev, "ignoring port@%u/endpoint@%u\n", vep.base.port, + vep.base.id); else if (ret < 0) dev_warn(dev, "driver could not parse port@%u/endpoint@%u (%d)\n", - vep->base.port, vep->base.id, ret); - v4l2_fwnode_endpoint_free(vep); + vep.base.port, vep.base.id, ret); + v4l2_fwnode_endpoint_free(&vep); if (ret < 0) goto out_err; diff --git a/include/media/v4l2-fwnode.h b/include/media/v4l2-fwnode.h index 8b4873c37098..4a371c3ad86c 100644 --- a/include/media/v4l2-fwnode.h +++ b/include/media/v4l2-fwnode.h @@ -161,6 +161,7 @@ void v4l2_fwnode_endpoint_free(struct v4l2_fwnode_endpoint *vep); /** * v4l2_fwnode_endpoint_alloc_parse() - parse all fwnode node properties * @fwnode: pointer to the endpoint's fwnode handle + * @vep: pointer to the V4L2 fwnode data structure * * All properties are optional. If none are found, we don't set any flags. This * means the port has a static configuration and no properties have to be @@ -170,6 +171,8 @@ void v4l2_fwnode_endpoint_free(struct v4l2_fwnode_endpoint *vep); * set the V4L2_MBUS_CSI2_CONTINUOUS_CLOCK flag. The caller should hold a * reference to @fwnode. * + * The caller must set the bus_type field of @vep to zero. + * * v4l2_fwnode_endpoint_alloc_parse() has two important differences to * v4l2_fwnode_endpoint_parse(): * @@ -178,11 +181,10 @@ void v4l2_fwnode_endpoint_free(struct v4l2_fwnode_endpoint *vep); * 2. The memory it has allocated to store the variable size data must be freed * using v4l2_fwnode_endpoint_free() when no longer needed. * - * Return: Pointer to v4l2_fwnode_endpoint if successful, on an error pointer - * on error. + * Return: 0 on success or a negative error code on failure. */ -struct v4l2_fwnode_endpoint *v4l2_fwnode_endpoint_alloc_parse( - struct fwnode_handle *fwnode); +int v4l2_fwnode_endpoint_alloc_parse( + struct fwnode_handle *fwnode, struct v4l2_fwnode_endpoint *vep); /** * v4l2_fwnode_parse_link() - parse a link between two endpoints

[v3,07/23] v4l: fwnode: Let the caller provide V4L2 fwnode endpoint

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Patch