From patchwork Wed Apr 5 09:29:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Kepplinger X-Patchwork-Id: 91075 Received: from vger.kernel.org ([23.128.96.18]) by www.linuxtv.org with esmtp (Exim 4.92) (envelope-from ) id 1pjzba-00CoxH-E7; Wed, 05 Apr 2023 09:39:02 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237192AbjDEJjA (ORCPT + 1 other); Wed, 5 Apr 2023 05:39:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45440 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236821AbjDEJi7 (ORCPT ); Wed, 5 Apr 2023 05:38:59 -0400 Received: from comms.puri.sm (comms.puri.sm [159.203.221.185]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BDAF41BCD; Wed, 5 Apr 2023 02:38:43 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by comms.puri.sm (Postfix) with ESMTP id AADA2EBD85; Wed, 5 Apr 2023 02:29:52 -0700 (PDT) Received: from comms.puri.sm ([127.0.0.1]) by localhost (comms.puri.sm [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Gzx8Ou6BRyKA; Wed, 5 Apr 2023 02:29:52 -0700 (PDT) From: Martin Kepplinger DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=puri.sm; s=comms; t=1680686991; bh=lBhbPCF1Y4hppeWsEQDV7v/uKE47NGMFGiQeVEMoCLI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JZ+XhHgSha6aNpNiRwh5xIElof1z2G6wmwGi51ucJh2CJ9qjHisHZPxsLE4jkBEfw SfUEPsUgz5dOm2W2GGcbO+Es8ZMt1IVVpfppavp/RU7Hv+kWU1Af8pfBGfVmuqGPDz AYaWpxRxeEhJoHPBn7ZBxTBCXCye5EVupEkR+1BxzMa8XVwQvX2f1wUa5ZS/Kglz4u boIAamlgQA4Ignb3b+ZD9FUtHmMTh2sHOGGL/Ritg/b8uBgSU4YRUPw1ZAMXTAPG9i 4vehL5AdeDjPhgyi93ZmgGkHgsoF4scrXwhpY6GM4dxXycNQDI0hJLD+llVTZaSAcV hb1U/XgGYEx6Q== To: mchehab@kernel.org, laurent.pinchart@ideasonboard.com Cc: kernel@puri.sm, linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Martin Kepplinger Subject: [PATCH v1 2/2] media: hi846: preserve the streaming state during system suspend Date: Wed, 5 Apr 2023 11:29:04 +0200 Message-Id: <20230405092904.1129395-3-martin.kepplinger@puri.sm> In-Reply-To: <20230405092904.1129395-1-martin.kepplinger@puri.sm> References: <20230405092904.1129395-1-martin.kepplinger@puri.sm> MIME-Version: 1.0 X-Spam-Status: No, score=-0.2 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-LSpam-Score: -2.5 (--) X-LSpam-Report: No, score=-2.5 required=5.0 tests=BAYES_00=-1.9,DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,HEADER_FROM_DIFFERENT_DOMAINS=0.5,MAILING_LIST_MULTI=-1 autolearn=ham autolearn_force=no The hi846 driver changed the "streaming" state inside of "start/stop_streaming". The problem is that inside of the (system) suspend callback, it calls "stop_streaming" unconditionally. So streaming would always be stopped when suspending. That makes sense with runtime pm for example, after s_stream(..., 0) but does not preserve the "streaming" state during system suspend when currently streaming. Fix this by simply setting the streaming state outside of "start/stop_streaming" which is s_stream(). While at it, improve things a bit by not assigning "1", but the "enable" value we later compare against, and fix one error handling path in resume(). Signed-off-by: Martin Kepplinger --- drivers/media/i2c/hi846.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/media/i2c/hi846.c b/drivers/media/i2c/hi846.c index 0b0eda2e223cd..1ca6e9407d618 100644 --- a/drivers/media/i2c/hi846.c +++ b/drivers/media/i2c/hi846.c @@ -1780,8 +1780,6 @@ static int hi846_start_streaming(struct hi846 *hi846) return ret; } - hi846->streaming = 1; - dev_dbg(&client->dev, "%s: started streaming successfully\n", __func__); return ret; @@ -1793,8 +1791,6 @@ static void hi846_stop_streaming(struct hi846 *hi846) if (hi846_write_reg(hi846, HI846_REG_MODE_SELECT, HI846_MODE_STANDBY)) dev_err(&client->dev, "failed to stop stream"); - - hi846->streaming = 0; } static int hi846_set_stream(struct v4l2_subdev *sd, int enable) @@ -1816,10 +1812,12 @@ static int hi846_set_stream(struct v4l2_subdev *sd, int enable) } ret = hi846_start_streaming(hi846); + hi846->streaming = enable; } if (!enable || ret) { hi846_stop_streaming(hi846); + hi846->streaming = 0; pm_runtime_put(&client->dev); } @@ -1898,6 +1896,8 @@ static int __maybe_unused hi846_resume(struct device *dev) if (ret) { dev_err(dev, "%s: start streaming failed: %d\n", __func__, ret); + hi846_stop_streaming(hi846); + hi846->streaming = 0; goto error; } }