From patchwork Sun Sep 29 13:36:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 13815103 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 600BCCF6495 for ; Sun, 29 Sep 2024 13:39:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=H24heGZOFwke5+du84omb0id4JX0VLJyKIeoEtlCUIY=; b=CNjq7zx78jkY7BdHqceth9Z50I +5EqyQGqmynaUMv8HgnP/PHYEb8+EfH7UVdy7/feI6gNTaDYKquSeXCyZ7ilWKIajHWJvGovDJfH0 Yrp3+5NlH68ZDAB/Yqx7Vu7tjtD8sc+vTptIzBYsPx5mzX7U/3pKJKx/Ih8pA6MpqZXxl83+gwD7V x95w+p5Mxjj4SAJWHLKgnqoAHCsYASwp+MYeiiNsURR4GPvfHCFZbI5JEquaS9molUQYc18ji3qmo 0I6y6XlHxo53H5X79+VKzWK4XVnE2pm+iU/4cI4IBkIunkgaKFzTMAFIGGCw3Hb9SXbWtU04K5pyX qUD1pAIA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1suu8q-0000000EpEP-30ti; Sun, 29 Sep 2024 13:39:16 +0000 Received: from perceval.ideasonboard.com ([213.167.242.64]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1suu6V-0000000EouQ-2qmk for linux-arm-kernel@lists.infradead.org; Sun, 29 Sep 2024 13:36:52 +0000 Received: from pendragon.ideasonboard.com (81-175-209-231.bb.dnainternet.fi [81.175.209.231]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 30B8A227; Sun, 29 Sep 2024 15:35:20 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1727616920; bh=OcwnUVuhMtXnLLH9oEg60Lun1uQvDGaKMD6lqbREbb0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ozIcoAtM2HkBfIVmBPyeQ4Ty0McQdDMf75iwy2vb8YFnugvwHVug1C31Fo1apPKMh 3QBLKfhlWF0xN1FrhPIDpLsVaMH0w9P3OJOtd4DkaT7QOqxbEwDkFFrlfsHShU8q/7 FUwuVOrSfVrRo4o+t6zD/dfzgkb6KnZWSka4ge1I= From: Laurent Pinchart To: Cc: guoniu.zhou@oss.nxp.com, imx@lists.linux.dev, linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/3] media: imx8mq-mipi-csi2: Drop stream stop/restart at suspend/resume time Date: Sun, 29 Sep 2024 16:36:40 +0300 Message-ID: <20240929133646.19991-2-laurent.pinchart@ideasonboard.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240929133646.19991-1-laurent.pinchart@ideasonboard.com> References: <20240929133646.19991-1-laurent.pinchart@ideasonboard.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240929_063651_879931_A99AC7B3 X-CRM114-Status: GOOD ( 11.26 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The imx8mq-mipi-csi2 driver stops streaming at suspend time, and restarts it at resume time, in both the runtime and system suspend/resume handlers. This isn't needed: - The device is runtime resumed only from the .s_stream() handler, before starting streaming, and runtime suspended in the same function, after stopping streaming. - For system suspend/resume, the whole capture pipeline is stopped and restarted in a controlled manner by the top-level driver (the CSI bridge in this case). When the system suspend handler is called, streaming will have been stopped already. Drop stream stop/restart from the PM handlers. Signed-off-by: Laurent Pinchart --- drivers/media/platform/nxp/imx8mq-mipi-csi2.c | 13 ------------- 1 file changed, 13 deletions(-) diff --git a/drivers/media/platform/nxp/imx8mq-mipi-csi2.c b/drivers/media/platform/nxp/imx8mq-mipi-csi2.c index d4a6c5532969..8eb9c7049425 100644 --- a/drivers/media/platform/nxp/imx8mq-mipi-csi2.c +++ b/drivers/media/platform/nxp/imx8mq-mipi-csi2.c @@ -64,7 +64,6 @@ enum { ST_POWERED = 1, - ST_STREAMING = 2, ST_SUSPENDED = 4, }; @@ -420,12 +419,9 @@ static int imx8mq_mipi_csi_s_stream(struct v4l2_subdev *sd, int enable) ret = v4l2_subdev_call(state->src_sd, video, s_stream, 1); if (ret < 0) goto unlock; - - state->state |= ST_STREAMING; } else { v4l2_subdev_call(state->src_sd, video, s_stream, 0); imx8mq_mipi_csi_stop_stream(state); - state->state &= ~ST_STREAMING; } unlock: @@ -668,7 +664,6 @@ static int imx8mq_mipi_csi_pm_resume(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct csi_state *state = mipi_sd_to_csi2_state(sd); - struct v4l2_subdev_state *sd_state; int ret = 0; mutex_lock(&state->lock); @@ -677,17 +672,9 @@ static int imx8mq_mipi_csi_pm_resume(struct device *dev) state->state |= ST_POWERED; ret = imx8mq_mipi_csi_clk_enable(state); } - if (state->state & ST_STREAMING) { - sd_state = v4l2_subdev_lock_and_get_active_state(sd); - ret = imx8mq_mipi_csi_start_stream(state, sd_state); - v4l2_subdev_unlock_state(sd_state); - if (ret) - goto unlock; - } state->state &= ~ST_SUSPENDED; -unlock: mutex_unlock(&state->lock); return ret ? -EAGAIN : 0;