From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 47A77C2B9F8 for ; Mon, 24 May 2021 11:10:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 289DE61153 for ; Mon, 24 May 2021 11:10:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232834AbhEXLLa (ORCPT ); Mon, 24 May 2021 07:11:30 -0400 Received: from perceval.ideasonboard.com ([213.167.242.64]:33754 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232749AbhEXLLQ (ORCPT ); Mon, 24 May 2021 07:11:16 -0400 Received: from deskari.lan (91-157-208-71.elisa-laajakaista.fi [91.157.208.71]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 055DA3566; Mon, 24 May 2021 13:09:34 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1621854575; bh=4gIY8mRViO0Faft/sFNJDR7gf9K/AXfagtIOEJE8WV0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dEtD4vhvMZFtOLyF09Cu9YybvE21FY6Guv/GzJRWMeF39ckNwhIYC6HkC5TU4Wv4k 21XaxIkuKsgUZTYzMINLlLTo1209MBsfTR6lEAyWI+hauPRMLIJrxZX5PPvQ3i/9g6 WX9ptPdndBQ7hY0JCnufUyIrNgYHNx5wA0062xzo= From: Tomi Valkeinen To: Laurent Pinchart , Pratyush Yadav , Lokesh Vutla , linux-media@vger.kernel.org Cc: Tomi Valkeinen Subject: [PATCH v3 33/38] media: ti-vpe: cal: add camerarx locking Date: Mon, 24 May 2021 14:09:04 +0300 Message-Id: <20210524110909.672432-34-tomi.valkeinen@ideasonboard.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210524110909.672432-1-tomi.valkeinen@ideasonboard.com> References: <20210524110909.672432-1-tomi.valkeinen@ideasonboard.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org We don't have any locking in camerarx for the subdev ops. We have managed fine so far without locking, but in the future multiple video capture devices can use the same camerarx, and locking is a must. Add a mutex to protect the camerarx subdev ops. Some of the functions were slightly restructured to make lock handling cleaner. Signed-off-by: Tomi Valkeinen --- drivers/media/platform/ti-vpe/cal-camerarx.c | 81 ++++++++++++++------ drivers/media/platform/ti-vpe/cal.h | 3 + 2 files changed, 61 insertions(+), 23 deletions(-) diff --git a/drivers/media/platform/ti-vpe/cal-camerarx.c b/drivers/media/platform/ti-vpe/cal-camerarx.c index 82392499e663..b87ffc52feb6 100644 --- a/drivers/media/platform/ti-vpe/cal-camerarx.c +++ b/drivers/media/platform/ti-vpe/cal-camerarx.c @@ -601,12 +601,18 @@ cal_camerarx_get_pad_format(struct cal_camerarx *phy, static int cal_camerarx_sd_s_stream(struct v4l2_subdev *sd, int enable) { struct cal_camerarx *phy = to_cal_camerarx(sd); + int r = 0; + + mutex_lock(&phy->mutex); if (enable) - return cal_camerarx_start(phy); + r = cal_camerarx_start(phy); + else + cal_camerarx_stop(phy); - cal_camerarx_stop(phy); - return 0; + mutex_unlock(&phy->mutex); + + return r; } static int cal_camerarx_sd_enum_mbus_code(struct v4l2_subdev *sd, @@ -614,27 +620,36 @@ static int cal_camerarx_sd_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_mbus_code_enum *code) { struct cal_camerarx *phy = to_cal_camerarx(sd); + int r = 0; + + mutex_lock(&phy->mutex); /* No transcoding, source and sink codes must match. */ if (code->pad == CAL_CAMERARX_PAD_SOURCE) { struct v4l2_mbus_framefmt *fmt; - if (code->index > 0) - return -EINVAL; + if (code->index > 0) { + r = -EINVAL; + goto out; + } fmt = cal_camerarx_get_pad_format(phy, sd_state, CAL_CAMERARX_PAD_SINK, code->which); code->code = fmt->code; - return 0; - } + } else { + if (code->index >= cal_num_formats) { + r = -EINVAL; + goto out; + } - if (code->index >= cal_num_formats) - return -EINVAL; + code->code = cal_formats[code->index].code; + } - code->code = cal_formats[code->index].code; +out: + mutex_unlock(&phy->mutex); - return 0; + return r; } static int cal_camerarx_sd_enum_frame_size(struct v4l2_subdev *sd, @@ -643,10 +658,13 @@ static int cal_camerarx_sd_enum_frame_size(struct v4l2_subdev *sd, { struct cal_camerarx *phy = to_cal_camerarx(sd); const struct cal_format_info *fmtinfo; + int r = 0; if (fse->index > 0) return -EINVAL; + mutex_lock(&phy->mutex); + /* No transcoding, source and sink formats must match. */ if (fse->pad == CAL_CAMERARX_PAD_SOURCE) { struct v4l2_mbus_framefmt *fmt; @@ -654,27 +672,34 @@ static int cal_camerarx_sd_enum_frame_size(struct v4l2_subdev *sd, fmt = cal_camerarx_get_pad_format(phy, sd_state, CAL_CAMERARX_PAD_SINK, fse->which); - if (fse->code != fmt->code) - return -EINVAL; + if (fse->code != fmt->code) { + r = -EINVAL; + goto out; + } fse->min_width = fmt->width; fse->max_width = fmt->width; fse->min_height = fmt->height; fse->max_height = fmt->height; + } else { + fmtinfo = cal_format_by_code(fse->code); + if (!fmtinfo) { + r = -EINVAL; + goto out; + } - return 0; + fse->min_width = + CAL_MIN_WIDTH_BYTES * 8 / ALIGN(fmtinfo->bpp, 8); + fse->max_width = + CAL_MAX_WIDTH_BYTES * 8 / ALIGN(fmtinfo->bpp, 8); + fse->min_height = CAL_MIN_HEIGHT_LINES; + fse->max_height = CAL_MAX_HEIGHT_LINES; } - fmtinfo = cal_format_by_code(fse->code); - if (!fmtinfo) - return -EINVAL; - - fse->min_width = CAL_MIN_WIDTH_BYTES * 8 / ALIGN(fmtinfo->bpp, 8); - fse->max_width = CAL_MAX_WIDTH_BYTES * 8 / ALIGN(fmtinfo->bpp, 8); - fse->min_height = CAL_MIN_HEIGHT_LINES; - fse->max_height = CAL_MAX_HEIGHT_LINES; +out: + mutex_unlock(&phy->mutex); - return 0; + return r; } static int cal_camerarx_sd_get_fmt(struct v4l2_subdev *sd, @@ -684,10 +709,14 @@ static int cal_camerarx_sd_get_fmt(struct v4l2_subdev *sd, struct cal_camerarx *phy = to_cal_camerarx(sd); struct v4l2_mbus_framefmt *fmt; + mutex_lock(&phy->mutex); + fmt = cal_camerarx_get_pad_format(phy, sd_state, format->pad, format->which); format->format = *fmt; + mutex_unlock(&phy->mutex); + return 0; } @@ -725,6 +754,8 @@ static int cal_camerarx_sd_set_fmt(struct v4l2_subdev *sd, format->format.field = V4L2_FIELD_NONE; /* Store the format and propagate it to the source pad. */ + mutex_lock(&phy->mutex); + fmt = cal_camerarx_get_pad_format(phy, sd_state, CAL_CAMERARX_PAD_SINK, format->which); @@ -735,6 +766,8 @@ static int cal_camerarx_sd_set_fmt(struct v4l2_subdev *sd, format->which); *fmt = format->format; + mutex_unlock(&phy->mutex); + return 0; } @@ -801,6 +834,8 @@ struct cal_camerarx *cal_camerarx_create(struct cal_dev *cal, phy->cal = cal; phy->instance = instance; + mutex_init(&phy->mutex); + phy->res = platform_get_resource_byname(pdev, IORESOURCE_MEM, (instance == 0) ? "cal_rx_core0" : diff --git a/drivers/media/platform/ti-vpe/cal.h b/drivers/media/platform/ti-vpe/cal.h index ad08c189ad3b..78bd2e041d9a 100644 --- a/drivers/media/platform/ti-vpe/cal.h +++ b/drivers/media/platform/ti-vpe/cal.h @@ -163,6 +163,9 @@ struct cal_camerarx { struct v4l2_subdev subdev; struct media_pad pads[2]; struct v4l2_mbus_framefmt formats[2]; + + /* mutex for camerarx ops */ + struct mutex mutex; }; struct cal_dev { -- 2.25.1