From patchwork Thu Sep 23 16:43:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Philipp Zabel X-Patchwork-Id: 12513305 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 7F486C433EF for ; Thu, 23 Sep 2021 16:43:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4D4CC6103C for ; Thu, 23 Sep 2021 16:43:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233256AbhIWQpN (ORCPT ); Thu, 23 Sep 2021 12:45:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51464 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230139AbhIWQpN (ORCPT ); Thu, 23 Sep 2021 12:45:13 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 975BDC061574 for ; Thu, 23 Sep 2021 09:43:41 -0700 (PDT) Received: from dude02.hi.pengutronix.de ([2001:67c:670:100:1d::28] helo=dude02.pengutronix.de.) by metis.ext.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1mTRox-0007X7-VN; Thu, 23 Sep 2021 18:43:39 +0200 From: Philipp Zabel To: linux-media@vger.kernel.org Cc: kernel@pengutronix.de, Michael Tretter Subject: [PATCH] media: tc358743: implement pre_streamon to put all lanes into LP-11 state Date: Thu, 23 Sep 2021 18:43:32 +0200 Message-Id: <20210923164332.18227-1-p.zabel@pengutronix.de> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::28 X-SA-Exim-Mail-From: p.zabel@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-media@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org If the connected MIPI CSI-2 RX driver uses the new pre_streamon subdev call, we don't have to reinitialize the CSI-2 TX after streamoff. Just put all lanes into LP-11 state during pre_streamon if requested. Signed-off-by: Philipp Zabel --- drivers/media/i2c/tc358743.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/drivers/media/i2c/tc358743.c b/drivers/media/i2c/tc358743.c index 3205cd8298dd..40eec67604e0 100644 --- a/drivers/media/i2c/tc358743.c +++ b/drivers/media/i2c/tc358743.c @@ -93,6 +93,7 @@ struct tc358743_state { struct v4l2_dv_timings timings; u32 mbus_fmt_code; u8 csi_lanes_in_use; + bool pre_streamon_used; struct gpio_desc *reset_gpio; @@ -1637,8 +1638,10 @@ static int tc358743_get_mbus_config(struct v4l2_subdev *sd, static int tc358743_s_stream(struct v4l2_subdev *sd, int enable) { + struct tc358743_state *state = to_state(sd); + enable_stream(sd, enable); - if (!enable) { + if (!enable && !state->pre_streamon_used) { /* Put all lanes in LP-11 state (STOPSTATE) */ tc358743_set_csi(sd); } @@ -1646,6 +1649,19 @@ static int tc358743_s_stream(struct v4l2_subdev *sd, int enable) return 0; } +static int tc358743_pre_streamon(struct v4l2_subdev *sd, u32 flags) +{ + struct tc358743_state *state = to_state(sd); + + /* Put all lanes in LP-11 state (STOPSTATE) if requested */ + if (flags & V4L2_SUBDEV_PRE_STREAMON_FL_MANUAL_LP) + tc358743_set_csi(sd); + + state->pre_streamon_used = true; + + return 0; +} + /* --------------- PAD OPS --------------- */ static int tc358743_enum_mbus_code(struct v4l2_subdev *sd, @@ -1840,6 +1856,7 @@ static const struct v4l2_subdev_video_ops tc358743_video_ops = { .g_dv_timings = tc358743_g_dv_timings, .query_dv_timings = tc358743_query_dv_timings, .s_stream = tc358743_s_stream, + .pre_streamon = tc358743_pre_streamon, }; static const struct v4l2_subdev_pad_ops tc358743_pad_ops = {