From patchwork Fri Oct 27 09:59:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 738829 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 55908C25B70 for ; Fri, 27 Oct 2023 09:59:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345696AbjJ0J7a (ORCPT ); Fri, 27 Oct 2023 05:59:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55208 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345689AbjJ0J7Z (ORCPT ); Fri, 27 Oct 2023 05:59:25 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E5E981A5 for ; Fri, 27 Oct 2023 02:59:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1698400762; x=1729936762; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=SnurpDXcqlMcoUr3lGzDLbBzifaE3YxtcFmcqVgFBKA=; b=X71ZtCgN1vEa7iYTt2jhXcDUlEFUdWD8P6FCBx26jjbXIMDYNbJRs91B g8F+KSCXkGBEYwQQeDTJAf9dIe0A1enfLcUqhXhQs0laAHce8H1n0uhWz XOxTJf8mYTX+hIEY2dJotroGMsU5phlemIOT4IPV9noSEc7r0FfXgappf sE8BS9hILZd1KQ7QrupyOpEtZRhhteLaBe7oypmVTcM2+I1+bnnrIVXtP ToDUrAlWJ2fKCuOMv+tUSrqpAvOK+y3L3834QmLkoTi8LksyAGlgChdt/ a0nTm5XkxpPLqb00eQesXF9zYyvSUJiR5MkkSkNdOQV6Ejvgxwpj8Cv8p w==; X-IronPort-AV: E=McAfee;i="6600,9927,10875"; a="473986674" X-IronPort-AV: E=Sophos;i="6.03,255,1694761200"; d="scan'208";a="473986674" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Oct 2023 02:59:21 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.03,255,1694761200"; d="scan'208";a="7179887" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Oct 2023 02:57:56 -0700 Received: from svinhufvud.ger.corp.intel.com (localhost [IPv6:::1]) by kekkonen.fi.intel.com (Postfix) with ESMTP id 993E311F894; Fri, 27 Oct 2023 12:59:16 +0300 (EEST) From: Sakari Ailus To: linux-media@vger.kernel.org Cc: hverkuil@xs4all.nl, laurent.pinchart@ideasonboard.com, tomi.valkeinen@ideasonboard.com, jacopo.mondi@ideasonboard.com, bingbu.cao@intel.com, hongju.wang@intel.com, Alain Volmat Subject: [PATCH v5 2/8] media: v4l: subdev: Also return pads array information on stream functions Date: Fri, 27 Oct 2023 12:59:07 +0300 Message-Id: <20231027095913.1010187-3-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231027095913.1010187-1-sakari.ailus@linux.intel.com> References: <20231027095913.1010187-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org There are two sets of functions that return information from sub-device state, one for stream-unaware users and another for stream-aware users. Add support for stream-aware functions to return format, crop and compose information from pad-based array that are functionally equivalent to the old, stream-unaware ones. Also check state is non-NULL, in order to guard against old drivers potentially calling this with NULL state for active formats or selection rectangles. Signed-off-by: Sakari Ailus Reviewed-by: Laurent Pinchart Reviewed-by: Tomi Valkeinen --- drivers/media/v4l2-core/v4l2-subdev.c | 63 +++++++++++++++++++++++++++ include/media/v4l2-subdev.h | 9 ++-- 2 files changed, 69 insertions(+), 3 deletions(-) diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index ee4fe8f33a41..0495507475e7 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -1684,6 +1684,27 @@ v4l2_subdev_state_get_stream_format(struct v4l2_subdev_state *state, struct v4l2_subdev_stream_configs *stream_configs; unsigned int i; + if (WARN_ON_ONCE(!state)) + return NULL; + + if (state->pads) { + if (stream) + return NULL; + + /* + * Set the pad to 0 on error as this is aligned with the + * behaviour of the pad state information access functions. The + * purpose of setting pad to 0 here is to avoid accessing memory + * outside the pads array, but still issuing warning of the + * invalid access while making the caller's error handling + * easier. + */ + if (WARN_ON_ONCE(pad >= state->sd->entity.num_pads)) + pad = 0; + + return &state->pads[pad].try_fmt; + } + lockdep_assert_held(state->lock); stream_configs = &state->stream_configs; @@ -1705,6 +1726,27 @@ v4l2_subdev_state_get_stream_crop(struct v4l2_subdev_state *state, struct v4l2_subdev_stream_configs *stream_configs; unsigned int i; + if (WARN_ON_ONCE(!state)) + return NULL; + + if (state->pads) { + if (stream) + return NULL; + + /* + * Set the pad to 0 on error as this is aligned with the + * behaviour of the pad state information access functions. The + * purpose of setting pad to 0 here is to avoid accessing memory + * outside the pads array, but still issuing warning of the + * invalid access while making the caller's error handling + * easier. + */ + if (WARN_ON_ONCE(pad >= state->sd->entity.num_pads)) + pad = 0; + + return &state->pads[pad].try_crop; + } + lockdep_assert_held(state->lock); stream_configs = &state->stream_configs; @@ -1726,6 +1768,27 @@ v4l2_subdev_state_get_stream_compose(struct v4l2_subdev_state *state, struct v4l2_subdev_stream_configs *stream_configs; unsigned int i; + if (WARN_ON_ONCE(!state)) + return NULL; + + if (state->pads) { + if (stream) + return NULL; + + /* + * Set the pad to 0 on error as this is aligned with the + * behaviour of the pad state information access functions. The + * purpose of setting pad to 0 here is to avoid accessing memory + * outside the pads array, but still issuing warning of the + * invalid access while making the caller's error handling + * easier. + */ + if (WARN_ON_ONCE(pad >= state->sd->entity.num_pads)) + pad = 0; + + return &state->pads[pad].try_compose; + } + lockdep_assert_held(state->lock); stream_configs = &state->stream_configs; diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 6a02a565035c..0ba1cd8c3ac7 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -1550,7 +1550,8 @@ int v4l2_subdev_set_routing_with_fmt(struct v4l2_subdev *sd, * This returns a pointer to &struct v4l2_mbus_framefmt for the given pad + * stream in the subdev state. * - * If the state does not contain the given pad + stream, NULL is returned. + * For stream-unaware drivers the format for the corresponding pad is returned. + * If the pad does not exist, NULL is returned. */ struct v4l2_mbus_framefmt * v4l2_subdev_state_get_stream_format(struct v4l2_subdev_state *state, @@ -1565,7 +1566,8 @@ v4l2_subdev_state_get_stream_format(struct v4l2_subdev_state *state, * This returns a pointer to crop rectangle for the given pad + stream in the * subdev state. * - * If the state does not contain the given pad + stream, NULL is returned. + * For stream-unaware drivers the crop rectangle for the corresponding pad is + * returned. If the pad does not exist, NULL is returned. */ struct v4l2_rect * v4l2_subdev_state_get_stream_crop(struct v4l2_subdev_state *state, @@ -1581,7 +1583,8 @@ v4l2_subdev_state_get_stream_crop(struct v4l2_subdev_state *state, * This returns a pointer to compose rectangle for the given pad + stream in the * subdev state. * - * If the state does not contain the given pad + stream, NULL is returned. + * For stream-unaware drivers the compose rectangle for the corresponding pad is + * returned. If the pad does not exist, NULL is returned. */ struct v4l2_rect * v4l2_subdev_state_get_stream_compose(struct v4l2_subdev_state *state,