From patchwork Mon Mar 11 19:00:24 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Sylwester Nawrocki/Kernel \\(PLT\\) /SRPOL/Staff Engineer/Samsung Electronics" X-Patchwork-Id: 2250021 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id CD0563FC8F for ; Mon, 11 Mar 2013 19:01:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754489Ab3CKTBU (ORCPT ); Mon, 11 Mar 2013 15:01:20 -0400 Received: from mailout3.samsung.com ([203.254.224.33]:43986 "EHLO mailout3.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754451Ab3CKTBT (ORCPT ); Mon, 11 Mar 2013 15:01:19 -0400 Received: from epcpsbgm2.samsung.com (epcpsbgm2 [203.254.230.27]) by mailout3.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0MJI007GVFI6JY40@mailout3.samsung.com>; Tue, 12 Mar 2013 04:01:18 +0900 (KST) X-AuditID: cbfee61b-b7f076d0000034b6-a6-513e29fe3477 Received: from epmmp2 ( [203.254.227.17]) by epcpsbgm2.samsung.com (EPCPMTA) with SMTP id 6E.AB.13494.EF92E315; Tue, 12 Mar 2013 04:01:18 +0900 (KST) Received: from amdc1344.digital.local ([106.116.147.32]) by mmp2.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0MJI00F2XFGXUP00@mmp2.samsung.com>; Tue, 12 Mar 2013 04:01:17 +0900 (KST) From: Sylwester Nawrocki To: linux-media@vger.kernel.org Cc: kyungmin.park@samsung.com, myungjoo.ham@samsung.com, shaik.samsung@gmail.com, arun.kk@samsung.com, a.hajda@samsung.com, linux-samsung-soc@vger.kernel.org, Sylwester Nawrocki Subject: [PATCH RFC 09/11] s5p-fimc: Ensure proper s_power() call order in the ISP datapaths Date: Mon, 11 Mar 2013 20:00:24 +0100 Message-id: <1363028426-2771-10-git-send-email-s.nawrocki@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1363028426-2771-1-git-send-email-s.nawrocki@samsung.com> References: <1363028426-2771-1-git-send-email-s.nawrocki@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFuplluLIzCtJLcpLzFFi42I5/e+xoO4/TbtAgwtrOCxurTvHavHx1G1W i7NNb9gtejZsZbWYcX4fk8XtxhVsFofftLNarNs5id2Bw2PnrLvsHn1bVjF6fN4kF8AcxWWT kpqTWZZapG+XwJXRcmEiU8Eh/opFO2ezNjAe5Oli5OSQEDCR+PhjKguELSZx4d56NhBbSGA6 o8TRb4IQdgeTxKsWKRCbTcBQovdoHyOILSIgL/Gk9wZQPRcHs8A5Rok3N16zgiSEBeIkPvRs ALNZBFQlOj7vYQKxeQXcJJr+gtRwAC1TkJgzyQYkzAkUXvNkAdReV4kfP8+wT2DkXcDIsIpR NLUguaA4KT3XSK84Mbe4NC9dLzk/dxMjOJCeSe9gXNVgcYhRgINRiYdX4ZttoBBrYllxZe4h RgkOZiUR3pWbbAKFeFMSK6tSi/Lji0pzUosPMUpzsCiJ8x5stQ4UEkhPLEnNTk0tSC2CyTJx cEo1MGbP5LZ4lbNL1SaIX9gkbm3/3cnbn6obcuwqWGxg/98j9J9BU064SP2y5J7SFQprhP4e 5fA5+/fTS5WjzZeuaZU4vtO1ESqarpRkMFXlr7nW9o8Gr/vfSey6lXn1R6bMIbnnxtzBK9x7 dpfyfLiyRnOLv+ySq8Zybq0X6iumiPMon3FWixDLUWIpzkg01GIuKk4EAAg2i5sgAgAA Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org Since the FIMC-IS firmware communicates with an image sensor directly through the ISP I2C bus controllers the sub-devices power supplies cannot be simply enabled from left to right or disabled from right to left along the processing pipeline. Thus a subdev index to call s_power() on is looked up from a table, rather than doing the op call based on increasing/decreasing indexes. Signed-off-by: Sylwester Nawrocki Signed-off-by: Kyungmin Park --- drivers/media/platform/s5p-fimc/fimc-mdevice.c | 26 ++++++++++++++++-------- 1 file changed, 18 insertions(+), 8 deletions(-) diff --git a/drivers/media/platform/s5p-fimc/fimc-mdevice.c b/drivers/media/platform/s5p-fimc/fimc-mdevice.c index c99802d..e9e5337 100644 --- a/drivers/media/platform/s5p-fimc/fimc-mdevice.c +++ b/drivers/media/platform/s5p-fimc/fimc-mdevice.c @@ -128,23 +128,33 @@ static int __subdev_set_power(struct v4l2_subdev *sd, int on) * * Needs to be called with the graph mutex held. */ -static int fimc_pipeline_s_power(struct fimc_pipeline *p, bool state) +static int fimc_pipeline_s_power(struct fimc_pipeline *p, bool on) { - unsigned int i; - int ret; + static const u8 seq[2][IDX_MAX - 1] = { + { IDX_IS_ISP, IDX_SENSOR, IDX_CSIS, IDX_FLITE }, + { IDX_CSIS, IDX_FLITE, IDX_SENSOR, IDX_IS_ISP }, + }; + int i, ret = 0; if (p->subdevs[IDX_SENSOR] == NULL) return -ENXIO; - for (i = 0; i < IDX_MAX; i++) { - unsigned int idx = state ? (IDX_MAX - 1) - i : i; + for (i = 0; i < IDX_MAX - 1; i++) { + unsigned int idx = seq[on][i]; + + ret = __subdev_set_power(p->subdevs[idx], on); + - ret = __subdev_set_power(p->subdevs[idx], state); if (ret < 0 && ret != -ENXIO) - return ret; + goto error; } - return 0; +error: + for (; i >= 0; i--) { + unsigned int idx = seq[on][i]; + __subdev_set_power(p->subdevs[idx], !on); + } + return ret; } /**