From patchwork Mon May 18 10:24:39 2026 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Kocialkowski X-Patchwork-Id: 2297 Return-Path: X-Original-To: noreply@patchwork.local Delivered-To: noreply@patchwork.local Received: from sea.lore.kernel.org (sea.lore.kernel.org [172.234.253.10]) by mxe881.netcup.net (Postfix) with ESMTPS id C6A011C07A5 for ; Mon, 18 May 2026 12:30:27 +0200 (CEST) Authentication-Results: mxe881; spf=pass (sender IP is 172.234.253.10) smtp.mailfrom=linux-sunxi+bounces-23455-noreply=patchwork.local@lists.linux.dev smtp.helo=sea.lore.kernel.org Received-SPF: pass (mxe881: domain of lists.linux.dev designates 172.234.253.10 as permitted sender) client-ip=172.234.253.10; envelope-from=linux-sunxi+bounces-23455-noreply=patchwork.local@lists.linux.dev; helo=sea.lore.kernel.org; Received: from smtp.subspace.kernel.org (conduit.subspace.kernel.org [100.90.174.1]) by sea.lore.kernel.org (Postfix) with ESMTP id 63B833048DF5 for ; Mon, 18 May 2026 10:27:31 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 38A443E7BA0; Mon, 18 May 2026 10:27:31 +0000 (UTC) X-Original-To: linux-sunxi@lists.linux.dev Received: from leonov.paulk.fr (leonov.paulk.fr [185.233.101.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 09BC63E5EF8; Mon, 18 May 2026 10:27:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.233.101.22 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779100050; cv=none; b=huoLeTN1s+ncTj6cd9ZwpOtSvD5M/kHBWRp2cxb1EsZ/dewRAPloH1WvBDuYVTM0HbSnA+ZDJTM9eQx3s3TWpmWizLFMTNFOaUj8cHD6r2nLJyMZ/FjytHRPFNja7tBs4Pihqs0f8E8Kir+XlPpXgA0fjPf3GnKvroS/TldGCMo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779100050; c=relaxed/simple; bh=v9/oHB00j+2MpFeubgCrn6YeImJ75HNm2yALCtXVeeA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=U7ttaF55BOtkZLKsIhqdN9ir/ATZ9dLHzjKvA0D+O8MWk/VbrpL5Q078+4AEbUEW9Gj0XqKxV8I3WkeyCjWREC4ZCHgcswfHfAOvTZLEZHacQIst40LpckNwTQpFsDrXn7zewY8lOL0ithY595QepVSeKMUo7W5Z2s//XP/HcBU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sys-base.io; spf=pass smtp.mailfrom=sys-base.io; arc=none smtp.client-ip=185.233.101.22 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sys-base.io Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sys-base.io Received: from laika.paulk.fr (12.234.24.109.rev.sfr.net [109.24.234.12]) by leonov.paulk.fr (Postfix) with ESMTPS id 399FC1F80044; Mon, 18 May 2026 10:27:19 +0000 (UTC) Received: by laika.paulk.fr (Postfix, from userid 65534) id A3A9BB4080A; Mon, 18 May 2026 10:27:18 +0000 (UTC) X-Spam-Level: * Received: from collins (unknown [192.168.1.64]) by laika.paulk.fr (Postfix) with ESMTP id 5F82AB407F1; Mon, 18 May 2026 10:24:54 +0000 (UTC) From: Paul Kocialkowski To: linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org, linux-staging@lists.linux.dev Cc: Paul Kocialkowski , Mauro Carvalho Chehab , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Greg Kroah-Hartman , Arash Golgol , Laurent Pinchart , Nicolas Dufresne Subject: [PATCH 04/16] media: sun8i-a83t-mipi-csi2: Use V4L2 subdev active state Date: Mon, 18 May 2026 12:24:39 +0200 Message-ID: <20260518102451.417971-5-paulk@sys-base.io> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260518102451.417971-1-paulk@sys-base.io> References: <20260518102451.417971-1-paulk@sys-base.io> Precedence: bulk X-Mailing-List: linux-sunxi@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MORS-Enabled: yes X-MORS-DOMAIN: patchwork.local X-MORS-HOSTING: hosting172546 X-MORS-USER: hosting172546 X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= From: Arash Golgol Use the V4L2 subdev active state API to store the active format. This simplifies the driver not only by dropping the bridge mbus_format field, but it also allows dropping the bridge lock, replaced with the state lock. The sun8i-a83t-mipi-csi2 hardware does not perform any format conversion. Enforce identical formats on the sink and source pads in the set_fmt() and init_state() callbacks. Signed-off-by: Arash Golgol Reviewed-by: Paul Kocialkowski Tested-by: Paul Kocialkowski --- .../sun8i_a83t_mipi_csi2.c | 113 +++++++++--------- .../sun8i_a83t_mipi_csi2.h | 2 - 2 files changed, 56 insertions(+), 59 deletions(-) diff --git a/drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/sun8i_a83t_mipi_csi2.c b/drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/sun8i_a83t_mipi_csi2.c index dbc51daa4fe3..2b7635f3952d 100644 --- a/drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/sun8i_a83t_mipi_csi2.c +++ b/drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/sun8i_a83t_mipi_csi2.c @@ -144,12 +144,12 @@ sun8i_a83t_mipi_csi2_disable(struct sun8i_a83t_mipi_csi2_device *csi2_dev) } static void -sun8i_a83t_mipi_csi2_configure(struct sun8i_a83t_mipi_csi2_device *csi2_dev) +sun8i_a83t_mipi_csi2_configure(struct sun8i_a83t_mipi_csi2_device *csi2_dev, + const struct v4l2_mbus_framefmt *mbus_format) { struct regmap *regmap = csi2_dev->regmap; unsigned int lanes_count = csi2_dev->bridge.endpoint.bus.mipi_csi2.num_data_lanes; - struct v4l2_mbus_framefmt *mbus_format = &csi2_dev->bridge.mbus_format; const struct sun8i_a83t_mipi_csi2_format *format; struct device *dev = csi2_dev->dev; u32 version = 0; @@ -205,7 +205,8 @@ static int sun8i_a83t_mipi_csi2_s_stream(struct v4l2_subdev *subdev, int on) struct v4l2_subdev *source_subdev = csi2_dev->bridge.source_subdev; union phy_configure_opts dphy_opts = { 0 }; struct phy_configure_opts_mipi_dphy *dphy_cfg = &dphy_opts.mipi_dphy; - struct v4l2_mbus_framefmt *mbus_format = &csi2_dev->bridge.mbus_format; + struct v4l2_subdev_state *state; + const struct v4l2_mbus_framefmt *mbus_format; const struct sun8i_a83t_mipi_csi2_format *format; struct phy *dphy = csi2_dev->dphy; struct device *dev = csi2_dev->dev; @@ -215,8 +216,12 @@ static int sun8i_a83t_mipi_csi2_s_stream(struct v4l2_subdev *subdev, int on) unsigned long pixel_rate; int ret; - if (!source_subdev) - return -ENODEV; + state = v4l2_subdev_lock_and_get_active_state(subdev); + + if (!source_subdev) { + ret = -ENODEV; + goto unlock; + } if (!on) { v4l2_subdev_call(source_subdev, video, s_stream, 0); @@ -228,7 +233,7 @@ static int sun8i_a83t_mipi_csi2_s_stream(struct v4l2_subdev *subdev, int on) ret = pm_runtime_resume_and_get(dev); if (ret < 0) - return ret; + goto unlock; /* Sensor pixel rate */ @@ -254,6 +259,9 @@ static int sun8i_a83t_mipi_csi2_s_stream(struct v4l2_subdev *subdev, int on) goto error_pm; } + mbus_format = + v4l2_subdev_state_get_format(state, + SUN8I_A83T_MIPI_CSI2_PAD_SINK); format = sun8i_a83t_mipi_csi2_format_find(mbus_format->code); if (WARN_ON(!format)) { ret = -ENODEV; @@ -292,7 +300,7 @@ static int sun8i_a83t_mipi_csi2_s_stream(struct v4l2_subdev *subdev, int on) /* Controller */ - sun8i_a83t_mipi_csi2_configure(csi2_dev); + sun8i_a83t_mipi_csi2_configure(csi2_dev, mbus_format); sun8i_a83t_mipi_csi2_enable(csi2_dev); /* D-PHY */ @@ -309,7 +317,8 @@ static int sun8i_a83t_mipi_csi2_s_stream(struct v4l2_subdev *subdev, int on) if (ret && ret != -ENOIOCTLCMD) goto disable; - return 0; + ret = 0; + goto unlock; disable: phy_power_off(dphy); @@ -318,6 +327,8 @@ static int sun8i_a83t_mipi_csi2_s_stream(struct v4l2_subdev *subdev, int on) error_pm: pm_runtime_put(dev); +unlock: + v4l2_subdev_unlock_state(state); return ret; } @@ -341,22 +352,24 @@ sun8i_a83t_mipi_csi2_mbus_format_prepare(struct v4l2_mbus_framefmt *mbus_format) static int sun8i_a83t_mipi_csi2_init_state(struct v4l2_subdev *subdev, struct v4l2_subdev_state *state) { - struct sun8i_a83t_mipi_csi2_device *csi2_dev = - v4l2_get_subdevdata(subdev); - unsigned int pad = SUN8I_A83T_MIPI_CSI2_PAD_SINK; - struct v4l2_mbus_framefmt *mbus_format = - v4l2_subdev_state_get_format(state, pad); - struct mutex *lock = &csi2_dev->bridge.lock; + unsigned int pad; - mutex_lock(lock); + /* + * This subdev does not perform format conversion, + * initialize both pads identically. + */ + for (pad = 0; pad < subdev->entity.num_pads; pad++) { + struct v4l2_mbus_framefmt *mbus_format; - mbus_format->code = sun8i_a83t_mipi_csi2_formats[0].mbus_code; - mbus_format->width = 640; - mbus_format->height = 480; + mbus_format = v4l2_subdev_state_get_format(state, pad); + + mbus_format->code = sun8i_a83t_mipi_csi2_formats[0].mbus_code; + mbus_format->width = 640; + mbus_format->height = 480; - sun8i_a83t_mipi_csi2_mbus_format_prepare(mbus_format); + sun8i_a83t_mipi_csi2_mbus_format_prepare(mbus_format); + } - mutex_unlock(lock); return 0; } @@ -375,55 +388,33 @@ sun8i_a83t_mipi_csi2_enum_mbus_code(struct v4l2_subdev *subdev, return 0; } -static int sun8i_a83t_mipi_csi2_get_fmt(struct v4l2_subdev *subdev, - struct v4l2_subdev_state *state, - struct v4l2_subdev_format *format) -{ - struct sun8i_a83t_mipi_csi2_device *csi2_dev = - v4l2_get_subdevdata(subdev); - struct v4l2_mbus_framefmt *mbus_format = &format->format; - struct mutex *lock = &csi2_dev->bridge.lock; - - mutex_lock(lock); - - if (format->which == V4L2_SUBDEV_FORMAT_TRY) - *mbus_format = *v4l2_subdev_state_get_format(state, - format->pad); - else - *mbus_format = csi2_dev->bridge.mbus_format; - - mutex_unlock(lock); - - return 0; -} - static int sun8i_a83t_mipi_csi2_set_fmt(struct v4l2_subdev *subdev, struct v4l2_subdev_state *state, struct v4l2_subdev_format *format) { - struct sun8i_a83t_mipi_csi2_device *csi2_dev = - v4l2_get_subdevdata(subdev); - struct v4l2_mbus_framefmt *mbus_format = &format->format; - struct mutex *lock = &csi2_dev->bridge.lock; + struct v4l2_mbus_framefmt *fmt; - mutex_lock(lock); + /* The format on the source pad always matches the sink pad. */ + if (format->pad != SUN8I_A83T_MIPI_CSI2_PAD_SINK) + return v4l2_subdev_get_fmt(subdev, state, format); - sun8i_a83t_mipi_csi2_mbus_format_prepare(mbus_format); + sun8i_a83t_mipi_csi2_mbus_format_prepare(&format->format); - if (format->which == V4L2_SUBDEV_FORMAT_TRY) - *v4l2_subdev_state_get_format(state, format->pad) = - *mbus_format; - else - csi2_dev->bridge.mbus_format = *mbus_format; + /* Set the format on the sink pad. */ + fmt = v4l2_subdev_state_get_format(state, format->pad); + *fmt = format->format; - mutex_unlock(lock); + /* Propagate the format to the source pad. */ + fmt = v4l2_subdev_state_get_format(state, + SUN8I_A83T_MIPI_CSI2_PAD_SOURCE); + *fmt = format->format; return 0; } static const struct v4l2_subdev_pad_ops sun8i_a83t_mipi_csi2_pad_ops = { .enum_mbus_code = sun8i_a83t_mipi_csi2_enum_mbus_code, - .get_fmt = sun8i_a83t_mipi_csi2_get_fmt, + .get_fmt = v4l2_subdev_get_fmt, .set_fmt = sun8i_a83t_mipi_csi2_set_fmt, }; @@ -540,8 +531,6 @@ sun8i_a83t_mipi_csi2_bridge_setup(struct sun8i_a83t_mipi_csi2_device *csi2_dev) bool notifier_registered = false; int ret; - mutex_init(&bridge->lock); - /* V4L2 Subdev */ v4l2_subdev_init(subdev, &sun8i_a83t_mipi_csi2_subdev_ops); @@ -570,6 +559,12 @@ sun8i_a83t_mipi_csi2_bridge_setup(struct sun8i_a83t_mipi_csi2_device *csi2_dev) if (ret) return ret; + /* V4L2 Subdev finalize */ + + ret = v4l2_subdev_init_finalize(subdev); + if (ret < 0) + goto error_media_entity_cleanup; + /* V4L2 Async */ v4l2_async_subdev_nf_init(notifier, subdev); @@ -603,6 +598,9 @@ sun8i_a83t_mipi_csi2_bridge_setup(struct sun8i_a83t_mipi_csi2_device *csi2_dev) error_v4l2_notifier_cleanup: v4l2_async_nf_cleanup(notifier); + v4l2_subdev_cleanup(subdev); + +error_media_entity_cleanup: media_entity_cleanup(&subdev->entity); return ret; @@ -617,6 +615,7 @@ sun8i_a83t_mipi_csi2_bridge_cleanup(struct sun8i_a83t_mipi_csi2_device *csi2_dev v4l2_async_unregister_subdev(subdev); v4l2_async_nf_unregister(notifier); v4l2_async_nf_cleanup(notifier); + v4l2_subdev_cleanup(subdev); media_entity_cleanup(&subdev->entity); } diff --git a/drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/sun8i_a83t_mipi_csi2.h b/drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/sun8i_a83t_mipi_csi2.h index f1e64c53434c..819527bcd64d 100644 --- a/drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/sun8i_a83t_mipi_csi2.h +++ b/drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/sun8i_a83t_mipi_csi2.h @@ -33,8 +33,6 @@ struct sun8i_a83t_mipi_csi2_bridge { struct media_pad pads[SUN8I_A83T_MIPI_CSI2_PAD_COUNT]; struct v4l2_fwnode_endpoint endpoint; struct v4l2_async_notifier notifier; - struct v4l2_mbus_framefmt mbus_format; - struct mutex lock; /* Mbus format lock. */ struct v4l2_subdev *source_subdev; };