From patchwork Mon Dec 18 17:40:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mikhail Rudenko X-Patchwork-Id: 13497332 Received: from mail-lf1-f46.google.com (mail-lf1-f46.google.com [209.85.167.46]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B6F2971477; Mon, 18 Dec 2023 17:41:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="PqvXmH1u" Received: by mail-lf1-f46.google.com with SMTP id 2adb3069b0e04-50bf3efe2cbso3901608e87.2; Mon, 18 Dec 2023 09:41:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1702921266; x=1703526066; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=M0/5NCPPEP08dxHiHIezXLBrilHL+5rztH1UO29obAo=; b=PqvXmH1uUnkEz93haJsEFNRHyvGppMKE/C31snNWw6Mp2zk47O8wZP1wcH4bHbjkIX 0qA81yYknYGq5sQJ9HWHX/qI82mBOhPSnjVWnv5UTIajDY7Q/V0060zW2U96H8MiNbYW 3iOMbj75ja5rQr6QOtEU3gzGZ5uLGSL5kzgWIUOPuH1VuFAf0+9ukeegFq7laIxcUQss HNBLAHu4HL5ETFSkKgsgAKkPU9oT4qvlsSarJ+mIf4MmrHJ2y5qWHAh1lCCh18n3d2dB n2VTlI/cK8gXT/fqituofYxwGA+XBkAzof1zj5CgbXdFNrrVkBo7RNlclIQZryh63Obk 5W5g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702921266; x=1703526066; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=M0/5NCPPEP08dxHiHIezXLBrilHL+5rztH1UO29obAo=; b=o1pnAVNq/7bbzufwbMKt8P7MO03r85nJfqJLn7vqogwSvCF7rGYKkOf7ijt72KmJwV vpPl0EkYnKUf5J1fPcRZ4rQ6G7mGZNdhKX1RhPTNhc/EOBHjFXnRg9mwDPu+mUPiECfF I2Phe6mBthvxckYOhMzIyCOpetfqE+8sytZJ3PHgZBCm+kMAVZOT5WY55SZ4wffDk8yi EA07YoRCqdt6/6wdomtOUnYJcGh/WF98R7FvE9ujJ8uYLULT+zmx1l4Lpw8Q5NioTXlh OoL0VZbIjOxQEj3Vddm+wBvjRMc0dbE6B1B58nrtOHtIvf2mohWAO+8vAlG4ROD/8K6L aYlw== X-Gm-Message-State: AOJu0Yw+8cETf0IrCn5BYJsllb8t6e8JVKUIIPCWvYyDxKCiO8IN0VlO bFDtdjneZQuRi+DXWTwiuDR3OGQcbYpFdw== X-Google-Smtp-Source: AGHT+IF9ey4UQ6SUMpAGvUqYRTmdaHtMtctv+O6YHO1u0m2u4Rue0WRtBrlpVqU33PMFNKB4V2vFxg== X-Received: by 2002:a05:6512:1586:b0:50e:719:6feb with SMTP id bp6-20020a056512158600b0050e07196febmr4040180lfb.213.1702921266432; Mon, 18 Dec 2023 09:41:06 -0800 (PST) Received: from localhost ([83.149.246.185]) by smtp.gmail.com with ESMTPSA id f8-20020a193808000000b0050d12fe487bsm1077566lfa.277.2023.12.18.09.41.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Dec 2023 09:41:06 -0800 (PST) From: Mikhail Rudenko To: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Sakari Ailus , Laurent Pinchart , Jacopo Mondi , Tommaso Merciai , Christophe JAILLET , Dave Stevenson , Mauro Carvalho Chehab , Mikhail Rudenko Subject: [PATCH v2 07/20] media: i2c: ov4689: Use sub-device active state Date: Mon, 18 Dec 2023 20:40:28 +0300 Message-ID: <20231218174042.794012-8-mike.rudenko@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231218174042.794012-1-mike.rudenko@gmail.com> References: <20231218174042.794012-1-mike.rudenko@gmail.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Use sub-device active state. Employ control handler lock to synchronize access to the active state and s_stream. Signed-off-by: Mikhail Rudenko Reviewed-by: Laurent Pinchart --- drivers/media/i2c/ov4689.c | 75 ++++++++++++++++---------------------- 1 file changed, 32 insertions(+), 43 deletions(-) diff --git a/drivers/media/i2c/ov4689.c b/drivers/media/i2c/ov4689.c index d42f5d1a1ba8..501901aad4ae 100644 --- a/drivers/media/i2c/ov4689.c +++ b/drivers/media/i2c/ov4689.c @@ -86,7 +86,6 @@ struct ov4689 { u32 clock_rate; - struct mutex mutex; /* lock to protect ctrls and cur_mode */ struct v4l2_ctrl_handler ctrl_handler; struct v4l2_ctrl *exposure; @@ -319,19 +318,6 @@ static int ov4689_set_fmt(struct v4l2_subdev *sd, return 0; } -static int ov4689_get_fmt(struct v4l2_subdev *sd, - struct v4l2_subdev_state *sd_state, - struct v4l2_subdev_format *fmt) -{ - struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format; - struct ov4689 *ov4689 = to_ov4689(sd); - - /* only one mode supported for now */ - ov4689_fill_fmt(ov4689->cur_mode, mbus_fmt); - - return 0; -} - static int ov4689_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_mbus_code_enum *code) @@ -405,10 +391,11 @@ static int ov4689_get_selection(struct v4l2_subdev *sd, static int ov4689_s_stream(struct v4l2_subdev *sd, int on) { struct ov4689 *ov4689 = to_ov4689(sd); + struct v4l2_subdev_state *sd_state; struct device *dev = ov4689->dev; int ret = 0; - mutex_lock(&ov4689->mutex); + sd_state = v4l2_subdev_lock_and_get_active_state(&ov4689->subdev); if (on) { ret = pm_runtime_resume_and_get(dev); @@ -443,7 +430,7 @@ static int ov4689_s_stream(struct v4l2_subdev *sd, int on) } unlock_and_return: - mutex_unlock(&ov4689->mutex); + v4l2_subdev_unlock_state(sd_state); return ret; } @@ -506,18 +493,13 @@ static int __maybe_unused ov4689_power_off(struct device *dev) return 0; } -static int ov4689_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +static int ov4689_init_state(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state) { - struct ov4689 *ov4689 = to_ov4689(sd); - struct v4l2_mbus_framefmt *try_fmt; - - mutex_lock(&ov4689->mutex); - - try_fmt = v4l2_subdev_state_get_format(fh->state, 0); - /* Initialize try_fmt */ - ov4689_fill_fmt(&supported_modes[OV4689_MODE_2688_1520], try_fmt); + struct v4l2_mbus_framefmt *fmt = + v4l2_subdev_state_get_format(sd_state, 0); - mutex_unlock(&ov4689->mutex); + ov4689_fill_fmt(&supported_modes[OV4689_MODE_2688_1520], fmt); return 0; } @@ -526,10 +508,6 @@ static const struct dev_pm_ops ov4689_pm_ops = { SET_RUNTIME_PM_OPS(ov4689_power_off, ov4689_power_on, NULL) }; -static const struct v4l2_subdev_internal_ops ov4689_internal_ops = { - .open = ov4689_open, -}; - static const struct v4l2_subdev_video_ops ov4689_video_ops = { .s_stream = ov4689_s_stream, }; @@ -537,11 +515,15 @@ static const struct v4l2_subdev_video_ops ov4689_video_ops = { static const struct v4l2_subdev_pad_ops ov4689_pad_ops = { .enum_mbus_code = ov4689_enum_mbus_code, .enum_frame_size = ov4689_enum_frame_sizes, - .get_fmt = ov4689_get_fmt, + .get_fmt = v4l2_subdev_get_fmt, .set_fmt = ov4689_set_fmt, .get_selection = ov4689_get_selection, }; +static const struct v4l2_subdev_internal_ops ov4689_internal_ops = { + .init_state = ov4689_init_state, +}; + static const struct v4l2_subdev_ops ov4689_subdev_ops = { .video = &ov4689_video_ops, .pad = &ov4689_pad_ops, @@ -648,7 +630,6 @@ static int ov4689_initialize_controls(struct ov4689 *ov4689) ret = v4l2_ctrl_handler_init(handler, 10); if (ret) return ret; - handler->lock = &ov4689->mutex; ctrl = v4l2_ctrl_new_int_menu(handler, NULL, V4L2_CID_LINK_FREQ, 0, 0, link_freq_menu_items); @@ -861,13 +842,15 @@ static int ov4689_probe(struct i2c_client *client) return dev_err_probe(dev, ret, "Failed to get power regulators\n"); - mutex_init(&ov4689->mutex); - sd = &ov4689->subdev; v4l2_i2c_subdev_init(sd, client, &ov4689_subdev_ops); + sd->internal_ops = &ov4689_internal_ops; + ret = ov4689_initialize_controls(ov4689); - if (ret) - goto err_destroy_mutex; + if (ret) { + dev_err(dev, "Failed to initialize controls\n"); + return ret; + } ret = ov4689_power_on(dev); if (ret) @@ -877,19 +860,26 @@ static int ov4689_probe(struct i2c_client *client) if (ret) goto err_power_off; - sd->internal_ops = &ov4689_internal_ops; sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + sd->entity.function = MEDIA_ENT_F_CAM_SENSOR; ov4689->pad.flags = MEDIA_PAD_FL_SOURCE; - sd->entity.function = MEDIA_ENT_F_CAM_SENSOR; ret = media_entity_pads_init(&sd->entity, 1, &ov4689->pad); if (ret < 0) goto err_power_off; + sd->state_lock = ov4689->ctrl_handler.lock; + ret = v4l2_subdev_init_finalize(sd); + + if (ret) { + dev_err(dev, "Could not register v4l2 device\n"); + goto err_clean_entity; + } + ret = v4l2_async_register_subdev_sensor(sd); if (ret) { dev_err(dev, "v4l2 async register subdev failed\n"); - goto err_clean_entity; + goto err_clean_subdev; } pm_runtime_set_active(dev); @@ -898,14 +888,14 @@ static int ov4689_probe(struct i2c_client *client) return 0; +err_clean_subdev: + v4l2_subdev_cleanup(sd); err_clean_entity: media_entity_cleanup(&sd->entity); err_power_off: ov4689_power_off(dev); err_free_handler: v4l2_ctrl_handler_free(&ov4689->ctrl_handler); -err_destroy_mutex: - mutex_destroy(&ov4689->mutex); return ret; } @@ -917,9 +907,8 @@ static void ov4689_remove(struct i2c_client *client) v4l2_async_unregister_subdev(sd); media_entity_cleanup(&sd->entity); - + v4l2_subdev_cleanup(sd); v4l2_ctrl_handler_free(&ov4689->ctrl_handler); - mutex_destroy(&ov4689->mutex); pm_runtime_disable(&client->dev); if (!pm_runtime_status_suspended(&client->dev))