From patchwork Thu Jun 24 19:21:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pratyush Yadav X-Patchwork-Id: 466554 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 ADDE3C49EA7 for ; Thu, 24 Jun 2021 19:22:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9B47B613F2 for ; Thu, 24 Jun 2021 19:22:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232798AbhFXTYt (ORCPT ); Thu, 24 Jun 2021 15:24:49 -0400 Received: from fllv0016.ext.ti.com ([198.47.19.142]:47922 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232772AbhFXTYq (ORCPT ); Thu, 24 Jun 2021 15:24:46 -0400 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 15OJMLQ4089342; Thu, 24 Jun 2021 14:22:21 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1624562541; bh=VtxPq8UzsBfJ86/fQHgJhSQQ2BKfLbG0iHoXljBKAx8=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=bVRL3orSFg2fbsrSzaDo73qs4nngQroLtodTjN4an7TPJ79P1oshAQ3HaW3Z6i5OO oRFUQIHclEWq7zmC5oquLMmEQW/e/gLezpnNXRmiG3P1DL+op1Vro6k+aPmRU8Mn7e U290VKLUeqpAkax4H/GYvJoxXASFzwg5LQ0PyKwM= Received: from DLEE114.ent.ti.com (dlee114.ent.ti.com [157.170.170.25]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 15OJMLld029317 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 24 Jun 2021 14:22:21 -0500 Received: from DLEE107.ent.ti.com (157.170.170.37) by DLEE114.ent.ti.com (157.170.170.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Thu, 24 Jun 2021 14:22:21 -0500 Received: from fllv0040.itg.ti.com (10.64.41.20) by DLEE107.ent.ti.com (157.170.170.37) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2 via Frontend Transport; Thu, 24 Jun 2021 14:22:22 -0500 Received: from pratyush-OptiPlex-790.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 15OJM14I120548; Thu, 24 Jun 2021 14:22:18 -0500 From: Pratyush Yadav To: Mauro Carvalho Chehab CC: Laurent Pinchart , Vignesh Raghavendra , Tomi Valkeinen , Nikhil Devshatwar , Pratyush Yadav , Benoit Parrot , Maxime Ripard , =?utf-8?q?Niklas_S=C3=B6derlund?= , Sakari Ailus , , Subject: [PATCH v3 02/11] media: cadence: csi2rx: Unregister v4l2 async notifier Date: Fri, 25 Jun 2021 00:51:51 +0530 Message-ID: <20210624192200.22559-3-p.yadav@ti.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210624192200.22559-1-p.yadav@ti.com> References: <20210624192200.22559-1-p.yadav@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The notifier is added to the global notifier list when registered. When the module is removed, the struct csi2rx_priv in which the notifier is embedded, is destroyed. As a result the notifier list has a reference to a notifier that no longer exists. This causes invalid memory accesses when the list is iterated over. Similar for when the probe fails. Unregister and clean up the notifier to avoid this. Fixes: 1fc3b37f34f6 ("media: v4l: cadence: Add Cadence MIPI-CSI2 RX driver") Signed-off-by: Pratyush Yadav --- Changes in v3: - New in v3. drivers/media/platform/cadence/cdns-csi2rx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c index f2b4ddd31177..bf2e024d73c5 100644 --- a/drivers/media/platform/cadence/cdns-csi2rx.c +++ b/drivers/media/platform/cadence/cdns-csi2rx.c @@ -471,6 +471,7 @@ static int csi2rx_probe(struct platform_device *pdev) return 0; err_cleanup: + v4l2_async_notifier_unregister(&csi2rx->notifier); v4l2_async_notifier_cleanup(&csi2rx->notifier); err_free_priv: kfree(csi2rx); @@ -481,6 +482,8 @@ static int csi2rx_remove(struct platform_device *pdev) { struct csi2rx_priv *csi2rx = platform_get_drvdata(pdev); + v4l2_async_notifier_unregister(&csi2rx->notifier); + v4l2_async_notifier_cleanup(&csi2rx->notifier); v4l2_async_unregister_subdev(&csi2rx->subdev); kfree(csi2rx); From patchwork Thu Jun 24 19:21:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pratyush Yadav X-Patchwork-Id: 466553 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 444DFC49EA6 for ; Thu, 24 Jun 2021 19:22:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 21B3D610C7 for ; Thu, 24 Jun 2021 19:22:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232823AbhFXTYy (ORCPT ); Thu, 24 Jun 2021 15:24:54 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:51336 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232818AbhFXTYw (ORCPT ); Thu, 24 Jun 2021 15:24:52 -0400 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 15OJMUWZ043461; Thu, 24 Jun 2021 14:22:30 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1624562550; bh=5vgH9+Q5dkeV+iA2ccYP34gskHwhoifbJxU7sUk2f+I=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=eAKhVrp1sNgUpVsoPqIJ6usQ5qW1mTl8V2msNG9DKhm1vQaj8ryX4woIxZCoRODFD loNNfsc/DZ2jvAFnf2vgS3iITtumNTcH8Gnby4D1WANZ397buMhJ0j7mvhBTWoW4tN YhnmwSb+U+ZgsK8o1OvQ66H9PMydwIrAz6zvhEZU= Received: from DLEE103.ent.ti.com (dlee103.ent.ti.com [157.170.170.33]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 15OJMUBp086126 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 24 Jun 2021 14:22:30 -0500 Received: from DLEE115.ent.ti.com (157.170.170.26) by DLEE103.ent.ti.com (157.170.170.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Thu, 24 Jun 2021 14:22:30 -0500 Received: from fllv0040.itg.ti.com (10.64.41.20) by DLEE115.ent.ti.com (157.170.170.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2 via Frontend Transport; Thu, 24 Jun 2021 14:22:30 -0500 Received: from pratyush-OptiPlex-790.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 15OJM14L120548; Thu, 24 Jun 2021 14:22:28 -0500 From: Pratyush Yadav To: Mauro Carvalho Chehab CC: Laurent Pinchart , Vignesh Raghavendra , Tomi Valkeinen , Nikhil Devshatwar , Pratyush Yadav , Maxime Ripard , , Subject: [PATCH v3 05/11] media: cadence: csi2rx: Set the STOP bit when stopping a stream Date: Fri, 25 Jun 2021 00:51:54 +0530 Message-ID: <20210624192200.22559-6-p.yadav@ti.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210624192200.22559-1-p.yadav@ti.com> References: <20210624192200.22559-1-p.yadav@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The stream stop procedure says that the STOP bit should be set when the stream is to be stopped, and then the ready bit in stream status register polled to make sure the STOP operation is finished. Signed-off-by: Pratyush Yadav --- (no changes since v1) drivers/media/platform/cadence/cdns-csi2rx.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c index 379bc163d4c1..34d4829a0d87 100644 --- a/drivers/media/platform/cadence/cdns-csi2rx.c +++ b/drivers/media/platform/cadence/cdns-csi2rx.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include #include @@ -40,8 +41,12 @@ #define CSI2RX_STREAM_CTRL_REG(n) (CSI2RX_STREAM_BASE(n) + 0x000) #define CSI2RX_STREAM_CTRL_SOFT_RST BIT(4) +#define CSI2RX_STREAM_CTRL_STOP BIT(1) #define CSI2RX_STREAM_CTRL_START BIT(0) +#define CSI2RX_STREAM_STATUS_REG(n) (CSI2RX_STREAM_BASE(n) + 0x004) +#define CSI2RX_STREAM_STATUS_RDY BIT(31) + #define CSI2RX_STREAM_DATA_CFG_REG(n) (CSI2RX_STREAM_BASE(n) + 0x008) #define CSI2RX_STREAM_DATA_CFG_EN_VC_SELECT BIT(31) #define CSI2RX_STREAM_DATA_CFG_VC_SELECT(n) BIT((n) + 16) @@ -326,12 +331,23 @@ static int csi2rx_start(struct csi2rx_priv *csi2rx) static void csi2rx_stop(struct csi2rx_priv *csi2rx) { unsigned int i; + u32 val; + int ret; clk_prepare_enable(csi2rx->p_clk); clk_disable_unprepare(csi2rx->sys_clk); for (i = 0; i < csi2rx->max_streams; i++) { - writel(0, csi2rx->base + CSI2RX_STREAM_CTRL_REG(i)); + writel(CSI2RX_STREAM_CTRL_STOP, + csi2rx->base + CSI2RX_STREAM_CTRL_REG(i)); + + ret = readl_relaxed_poll_timeout(csi2rx->base + + CSI2RX_STREAM_STATUS_REG(i), + val, + (val & CSI2RX_STREAM_STATUS_RDY), + 10, 10000); + if (ret) + dev_warn(csi2rx->dev, "Failed to stop stream%d\n", i); clk_disable_unprepare(csi2rx->pixel_clk[i]); } From patchwork Thu Jun 24 19:21:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pratyush Yadav X-Patchwork-Id: 466552 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 DD474C49EA6 for ; Thu, 24 Jun 2021 19:22:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C5DB2613EC for ; Thu, 24 Jun 2021 19:22:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232847AbhFXTZA (ORCPT ); Thu, 24 Jun 2021 15:25:00 -0400 Received: from fllv0016.ext.ti.com ([198.47.19.142]:47992 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232809AbhFXTYz (ORCPT ); Thu, 24 Jun 2021 15:24:55 -0400 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 15OJMXwx089419; Thu, 24 Jun 2021 14:22:33 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1624562553; bh=ywfVlmeL6B7fVlWl+w8f1WfpEB315YolzBMmn2OcgLc=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=Q+jc0dusv2dhR3/Bww0hCpjiuX4fcUij5BuWB07PN8PhJwYShxPJQtqvMeeSIyZll 3m5LMk8kC+6oNXxE5Q4rrPfRCZkAA4Ti+xjGbsuNPYvyTjfmGmYbG0pYixpO+nzsRv G4cAwf5zeq/WINX/+J/v0tIpLAbUshjZ2nxhtdwo= Received: from DLEE115.ent.ti.com (dlee115.ent.ti.com [157.170.170.26]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 15OJMXhE028197 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 24 Jun 2021 14:22:33 -0500 Received: from DLEE104.ent.ti.com (157.170.170.34) by DLEE115.ent.ti.com (157.170.170.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Thu, 24 Jun 2021 14:22:33 -0500 Received: from fllv0040.itg.ti.com (10.64.41.20) by DLEE104.ent.ti.com (157.170.170.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2 via Frontend Transport; Thu, 24 Jun 2021 14:22:33 -0500 Received: from pratyush-OptiPlex-790.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 15OJM14M120548; Thu, 24 Jun 2021 14:22:31 -0500 From: Pratyush Yadav To: Mauro Carvalho Chehab CC: Laurent Pinchart , Vignesh Raghavendra , Tomi Valkeinen , Nikhil Devshatwar , Pratyush Yadav , Maxime Ripard , , Subject: [PATCH v3 06/11] media: cadence: csi2rx: Fix stream data configuration Date: Fri, 25 Jun 2021 00:51:55 +0530 Message-ID: <20210624192200.22559-7-p.yadav@ti.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210624192200.22559-1-p.yadav@ti.com> References: <20210624192200.22559-1-p.yadav@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Firstly, there is no VC_EN bit present in the STREAM_DATA_CFG register. Bit 31 is part of the VL_SELECT field. Remove it completely. Secondly, it makes little sense to enable ith virtual channel for ith stream. Sure, there might be a use-case that demands it. But there might also be a use case that demands all streams to use the 0th virtual channel. Prefer this case over the former because it is less arbitrary and also makes it very clear what the limitations of the current driver is instead of giving a false impression that multiple virtual channels are supported. Signed-off-by: Pratyush Yadav --- (no changes since v1) drivers/media/platform/cadence/cdns-csi2rx.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c index 34d4829a0d87..780b42df757a 100644 --- a/drivers/media/platform/cadence/cdns-csi2rx.c +++ b/drivers/media/platform/cadence/cdns-csi2rx.c @@ -48,7 +48,6 @@ #define CSI2RX_STREAM_STATUS_RDY BIT(31) #define CSI2RX_STREAM_DATA_CFG_REG(n) (CSI2RX_STREAM_BASE(n) + 0x008) -#define CSI2RX_STREAM_DATA_CFG_EN_VC_SELECT BIT(31) #define CSI2RX_STREAM_DATA_CFG_VC_SELECT(n) BIT((n) + 16) #define CSI2RX_STREAM_CFG_REG(n) (CSI2RX_STREAM_BASE(n) + 0x00c) @@ -291,8 +290,11 @@ static int csi2rx_start(struct csi2rx_priv *csi2rx) writel(CSI2RX_STREAM_CFG_FIFO_MODE_LARGE_BUF, csi2rx->base + CSI2RX_STREAM_CFG_REG(i)); - writel(CSI2RX_STREAM_DATA_CFG_EN_VC_SELECT | - CSI2RX_STREAM_DATA_CFG_VC_SELECT(i), + /* + * Enable one virtual channel. When multiple virtual channels + * are supported this will have to be changed. + */ + writel(CSI2RX_STREAM_DATA_CFG_VC_SELECT(0), csi2rx->base + CSI2RX_STREAM_DATA_CFG_REG(i)); writel(CSI2RX_STREAM_CTRL_START, From patchwork Thu Jun 24 19:21:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pratyush Yadav X-Patchwork-Id: 466550 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, 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 5A42DC49EB7 for ; Thu, 24 Jun 2021 19:23:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3F68B6141A for ; Thu, 24 Jun 2021 19:23:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232931AbhFXTZa (ORCPT ); Thu, 24 Jun 2021 15:25:30 -0400 Received: from fllv0016.ext.ti.com ([198.47.19.142]:48124 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232792AbhFXTZY (ORCPT ); Thu, 24 Jun 2021 15:25:24 -0400 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 15OJMh2l089450; Thu, 24 Jun 2021 14:22:43 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1624562563; bh=pVOFEeZFA7vYQNY1cSs8WzQChlNhIdVwTzEBAtIu+8U=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=GlArYuz4t8uzd71UZPl057SyVpB5x1f+XflA86XwPbxA/iqciFjJQxukfEJOrZGSl WCaF2G4jFvY08j8pl283QDmkylAgfCkyLyWJN/keFSNdQzNLPAz92m97x02Gz1ZRxA zsRB76OK4t76OKYMjPZN27F9A6JqFswhkBR3yrVo= Received: from DFLE110.ent.ti.com (dfle110.ent.ti.com [10.64.6.31]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 15OJMhMv028277 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 24 Jun 2021 14:22:43 -0500 Received: from DFLE110.ent.ti.com (10.64.6.31) by DFLE110.ent.ti.com (10.64.6.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Thu, 24 Jun 2021 14:22:43 -0500 Received: from fllv0040.itg.ti.com (10.64.41.20) by DFLE110.ent.ti.com (10.64.6.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2 via Frontend Transport; Thu, 24 Jun 2021 14:22:43 -0500 Received: from pratyush-OptiPlex-790.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 15OJM14O120548; Thu, 24 Jun 2021 14:22:37 -0500 From: Pratyush Yadav To: Mauro Carvalho Chehab CC: Laurent Pinchart , Vignesh Raghavendra , Tomi Valkeinen , Nikhil Devshatwar , Pratyush Yadav , Benoit Parrot , Bert Vermeulen , Eugen Hristev , Ezequiel Garcia , Hans Verkuil , Helen Koike , Jiapeng Chong , Kieran Bingham , Michael Tretter , Mirela Rabulea , Neil Armstrong , Qiushi Wu , Ricardo Ribalda , Thomas Bogendoerfer , Yang Yingliang , Zou Wei , , Subject: [PATCH v3 08/11] media: Re-structure TI platform drivers Date: Fri, 25 Jun 2021 00:51:57 +0530 Message-ID: <20210624192200.22559-9-p.yadav@ti.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210624192200.22559-1-p.yadav@ti.com> References: <20210624192200.22559-1-p.yadav@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The ti-vpe/ sub-directory does not only contain the VPE-specific things. It also contains the CAL driver, which is a completely different subsystem. This is also not a good place to add new drivers for other TI platforms since they will all get mixed up. Separate the VPE and CAL parts into different sub-directories and rename the ti-vpe/ sub-directory to ti/. This is now the place where new TI platform drivers can be added. Signed-off-by: Pratyush Yadav Reviewed-by: Tomi Valkeinen --- Compile tested only. There should be no functional change. Changes in v3: - Add Tomi's R-by. Changes in v2: - New in v2. MAINTAINERS | 3 ++- drivers/media/platform/Makefile | 2 +- drivers/media/platform/ti/Makefile | 3 +++ drivers/media/platform/ti/cal/Makefile | 3 +++ drivers/media/platform/{ti-vpe => ti/cal}/cal-camerarx.c | 0 drivers/media/platform/{ti-vpe => ti/cal}/cal-video.c | 0 drivers/media/platform/{ti-vpe => ti/cal}/cal.c | 0 drivers/media/platform/{ti-vpe => ti/cal}/cal.h | 0 drivers/media/platform/{ti-vpe => ti/cal}/cal_regs.h | 0 drivers/media/platform/{ti-vpe => ti/vpe}/Makefile | 4 ---- drivers/media/platform/{ti-vpe => ti/vpe}/csc.c | 0 drivers/media/platform/{ti-vpe => ti/vpe}/csc.h | 0 drivers/media/platform/{ti-vpe => ti/vpe}/sc.c | 0 drivers/media/platform/{ti-vpe => ti/vpe}/sc.h | 0 drivers/media/platform/{ti-vpe => ti/vpe}/sc_coeff.h | 0 drivers/media/platform/{ti-vpe => ti/vpe}/vpdma.c | 0 drivers/media/platform/{ti-vpe => ti/vpe}/vpdma.h | 0 drivers/media/platform/{ti-vpe => ti/vpe}/vpdma_priv.h | 0 drivers/media/platform/{ti-vpe => ti/vpe}/vpe.c | 0 drivers/media/platform/{ti-vpe => ti/vpe}/vpe_regs.h | 0 20 files changed, 9 insertions(+), 6 deletions(-) create mode 100644 drivers/media/platform/ti/Makefile create mode 100644 drivers/media/platform/ti/cal/Makefile rename drivers/media/platform/{ti-vpe => ti/cal}/cal-camerarx.c (100%) rename drivers/media/platform/{ti-vpe => ti/cal}/cal-video.c (100%) rename drivers/media/platform/{ti-vpe => ti/cal}/cal.c (100%) rename drivers/media/platform/{ti-vpe => ti/cal}/cal.h (100%) rename drivers/media/platform/{ti-vpe => ti/cal}/cal_regs.h (100%) rename drivers/media/platform/{ti-vpe => ti/vpe}/Makefile (78%) rename drivers/media/platform/{ti-vpe => ti/vpe}/csc.c (100%) rename drivers/media/platform/{ti-vpe => ti/vpe}/csc.h (100%) rename drivers/media/platform/{ti-vpe => ti/vpe}/sc.c (100%) rename drivers/media/platform/{ti-vpe => ti/vpe}/sc.h (100%) rename drivers/media/platform/{ti-vpe => ti/vpe}/sc_coeff.h (100%) rename drivers/media/platform/{ti-vpe => ti/vpe}/vpdma.c (100%) rename drivers/media/platform/{ti-vpe => ti/vpe}/vpdma.h (100%) rename drivers/media/platform/{ti-vpe => ti/vpe}/vpdma_priv.h (100%) rename drivers/media/platform/{ti-vpe => ti/vpe}/vpe.c (100%) rename drivers/media/platform/{ti-vpe => ti/vpe}/vpe_regs.h (100%) diff --git a/MAINTAINERS b/MAINTAINERS index 9ae47618c857..5dad98f69683 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -18584,7 +18584,8 @@ W: http://linuxtv.org/ Q: http://patchwork.linuxtv.org/project/linux-media/list/ F: Documentation/devicetree/bindings/media/ti,cal.yaml F: Documentation/devicetree/bindings/media/ti,vpe.yaml -F: drivers/media/platform/ti-vpe/ +F: drivers/media/platform/ti/cal/ +F: drivers/media/platform/ti/vpe/ TI WILINK WIRELESS DRIVERS L: linux-wireless@vger.kernel.org diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile index 73ce083c2fc6..26d15b377a79 100644 --- a/drivers/media/platform/Makefile +++ b/drivers/media/platform/Makefile @@ -15,7 +15,7 @@ obj-$(CONFIG_VIDEO_PXA27x) += pxa_camera.o obj-$(CONFIG_VIDEO_VIU) += fsl-viu.o -obj-y += ti-vpe/ +obj-y += ti/ obj-$(CONFIG_VIDEO_MX2_EMMAPRP) += mx2_emmaprp.o obj-$(CONFIG_VIDEO_CODA) += coda/ diff --git a/drivers/media/platform/ti/Makefile b/drivers/media/platform/ti/Makefile new file mode 100644 index 000000000000..bbc737ccbbea --- /dev/null +++ b/drivers/media/platform/ti/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-y += cal/ +obj-y += vpe/ diff --git a/drivers/media/platform/ti/cal/Makefile b/drivers/media/platform/ti/cal/Makefile new file mode 100644 index 000000000000..45ac35585f0b --- /dev/null +++ b/drivers/media/platform/ti/cal/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_VIDEO_TI_CAL) += ti-cal.o +ti-cal-y := cal.o cal-camerarx.o cal-video.o diff --git a/drivers/media/platform/ti-vpe/cal-camerarx.c b/drivers/media/platform/ti/cal/cal-camerarx.c similarity index 100% rename from drivers/media/platform/ti-vpe/cal-camerarx.c rename to drivers/media/platform/ti/cal/cal-camerarx.c diff --git a/drivers/media/platform/ti-vpe/cal-video.c b/drivers/media/platform/ti/cal/cal-video.c similarity index 100% rename from drivers/media/platform/ti-vpe/cal-video.c rename to drivers/media/platform/ti/cal/cal-video.c diff --git a/drivers/media/platform/ti-vpe/cal.c b/drivers/media/platform/ti/cal/cal.c similarity index 100% rename from drivers/media/platform/ti-vpe/cal.c rename to drivers/media/platform/ti/cal/cal.c diff --git a/drivers/media/platform/ti-vpe/cal.h b/drivers/media/platform/ti/cal/cal.h similarity index 100% rename from drivers/media/platform/ti-vpe/cal.h rename to drivers/media/platform/ti/cal/cal.h diff --git a/drivers/media/platform/ti-vpe/cal_regs.h b/drivers/media/platform/ti/cal/cal_regs.h similarity index 100% rename from drivers/media/platform/ti-vpe/cal_regs.h rename to drivers/media/platform/ti/cal/cal_regs.h diff --git a/drivers/media/platform/ti-vpe/Makefile b/drivers/media/platform/ti/vpe/Makefile similarity index 78% rename from drivers/media/platform/ti-vpe/Makefile rename to drivers/media/platform/ti/vpe/Makefile index ad624056e039..3fadfe084f87 100644 --- a/drivers/media/platform/ti-vpe/Makefile +++ b/drivers/media/platform/ti/vpe/Makefile @@ -10,7 +10,3 @@ ti-sc-y := sc.o ti-csc-y := csc.o ccflags-$(CONFIG_VIDEO_TI_VPE_DEBUG) += -DDEBUG - -obj-$(CONFIG_VIDEO_TI_CAL) += ti-cal.o - -ti-cal-y := cal.o cal-camerarx.o cal-video.o diff --git a/drivers/media/platform/ti-vpe/csc.c b/drivers/media/platform/ti/vpe/csc.c similarity index 100% rename from drivers/media/platform/ti-vpe/csc.c rename to drivers/media/platform/ti/vpe/csc.c diff --git a/drivers/media/platform/ti-vpe/csc.h b/drivers/media/platform/ti/vpe/csc.h similarity index 100% rename from drivers/media/platform/ti-vpe/csc.h rename to drivers/media/platform/ti/vpe/csc.h diff --git a/drivers/media/platform/ti-vpe/sc.c b/drivers/media/platform/ti/vpe/sc.c similarity index 100% rename from drivers/media/platform/ti-vpe/sc.c rename to drivers/media/platform/ti/vpe/sc.c diff --git a/drivers/media/platform/ti-vpe/sc.h b/drivers/media/platform/ti/vpe/sc.h similarity index 100% rename from drivers/media/platform/ti-vpe/sc.h rename to drivers/media/platform/ti/vpe/sc.h diff --git a/drivers/media/platform/ti-vpe/sc_coeff.h b/drivers/media/platform/ti/vpe/sc_coeff.h similarity index 100% rename from drivers/media/platform/ti-vpe/sc_coeff.h rename to drivers/media/platform/ti/vpe/sc_coeff.h diff --git a/drivers/media/platform/ti-vpe/vpdma.c b/drivers/media/platform/ti/vpe/vpdma.c similarity index 100% rename from drivers/media/platform/ti-vpe/vpdma.c rename to drivers/media/platform/ti/vpe/vpdma.c diff --git a/drivers/media/platform/ti-vpe/vpdma.h b/drivers/media/platform/ti/vpe/vpdma.h similarity index 100% rename from drivers/media/platform/ti-vpe/vpdma.h rename to drivers/media/platform/ti/vpe/vpdma.h diff --git a/drivers/media/platform/ti-vpe/vpdma_priv.h b/drivers/media/platform/ti/vpe/vpdma_priv.h similarity index 100% rename from drivers/media/platform/ti-vpe/vpdma_priv.h rename to drivers/media/platform/ti/vpe/vpdma_priv.h diff --git a/drivers/media/platform/ti-vpe/vpe.c b/drivers/media/platform/ti/vpe/vpe.c similarity index 100% rename from drivers/media/platform/ti-vpe/vpe.c rename to drivers/media/platform/ti/vpe/vpe.c diff --git a/drivers/media/platform/ti-vpe/vpe_regs.h b/drivers/media/platform/ti/vpe/vpe_regs.h similarity index 100% rename from drivers/media/platform/ti-vpe/vpe_regs.h rename to drivers/media/platform/ti/vpe/vpe_regs.h From patchwork Thu Jun 24 19:21:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pratyush Yadav X-Patchwork-Id: 466549 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, 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 217CDC49EAF for ; Thu, 24 Jun 2021 19:23:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 03C32610C7 for ; Thu, 24 Jun 2021 19:23:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232958AbhFXTZm (ORCPT ); Thu, 24 Jun 2021 15:25:42 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:51454 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232932AbhFXTZd (ORCPT ); Thu, 24 Jun 2021 15:25:33 -0400 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 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Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2 via Frontend Transport; Thu, 24 Jun 2021 14:22:49 -0500 Received: from pratyush-OptiPlex-790.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 15OJM14P120548; Thu, 24 Jun 2021 14:22:43 -0500 From: Pratyush Yadav To: Mauro Carvalho Chehab CC: Laurent Pinchart , Vignesh Raghavendra , Tomi Valkeinen , Nikhil Devshatwar , Pratyush Yadav , Alexandre Courbot , Arnd Bergmann , Bert Vermeulen , Dikshita Agarwal , Fabio Estevam , Georgi Djakov , Hans Verkuil , Helen Koike , Lad Prabhakar , Michael Tretter , Mirela Rabulea , Neil Armstrong , Stanimir Varbanov , Thomas Bogendoerfer , , Subject: [PATCH v3 09/11] media: ti: Add CSI2RX support for J721E Date: Fri, 25 Jun 2021 00:51:58 +0530 Message-ID: <20210624192200.22559-10-p.yadav@ti.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210624192200.22559-1-p.yadav@ti.com> References: <20210624192200.22559-1-p.yadav@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org TI's J721E uses the Cadence CSI2RX and DPHY peripherals to facilitate capture over a CSI-2 bus. The Cadence CSI2RX IP acts as a bridge between the TI specific parts and the CSI-2 protocol parts. TI then has a wrapper on top of this bridge called the SHIM layer. It takes in data from stream 0, repacks it, and sends it to memory over PSI-L DMA. This driver acts as the "front end" to V4L2 client applications. It implements the required ioctls and buffer operations, passes the necessary calls on to the bridge, programs the SHIM layer, and performs DMA via the dmaengine API to finally return the data to a buffer supplied by the application. Signed-off-by: Pratyush Yadav --- Changes in v3: - Move DMA related fields in struct ti_csi2rx_dma. - Protect DMA buffer queue with a spinlock to make sure the queue buffer and DMA callback don't race on it. - Track the current DMA state. It might go idle because of a lack of buffers. This state can be used to restart it if needed. - Do not include the current buffer in the pending queue. It is slightly better modelling than leaving it at the head of the pending queue. - Use the buffer as the callback argument, and add a reference to csi in it. - If queueing a buffer to DMA fails, the buffer gets leaked and DMA gets stalled with. Instead, report the error to vb2 and queue the next buffer in the pending queue. - DMA gets stalled if we run out of buffers since the callback is the only one that fires subsequent transfers and it is no longer being called. Check for that when queueing buffers and restart DMA if needed. - Do not put of node until we are done using the fwnode. - Set inital format to UYVY 640x480. Changes in v2: - Use dmaengine_get_dma_device() instead of directly accessing dma->device->dev. - Do not set dst_addr_width when configuring slave DMA. - Move to a separate subdir and rename to j721e-csi2rx.c - Convert compatible to ti,j721e-csi2rx. - Move to use Media Controller centric APIs. - Improve cleanup in probe when one of the steps fails. - Add colorspace to formats database. - Set hw_revision on media_device. - Move video device initialization to probe time instead of register time. MAINTAINERS | 6 + drivers/media/platform/Kconfig | 12 + drivers/media/platform/ti/Makefile | 1 + .../media/platform/ti/j721e-csi2rx/Makefile | 2 + .../platform/ti/j721e-csi2rx/j721e-csi2rx.c | 978 ++++++++++++++++++ 5 files changed, 999 insertions(+) create mode 100644 drivers/media/platform/ti/j721e-csi2rx/Makefile create mode 100644 drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c diff --git a/MAINTAINERS b/MAINTAINERS index 5dad98f69683..96f002b9046d 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -18467,6 +18467,12 @@ S: Odd Fixes F: drivers/clk/ti/ F: include/linux/clk/ti.h +TI J721E CSI2RX DRIVER +M: Pratyush Yadav +L: linux-media@vger.kernel.org +S: Supported +F: drivers/media/platform/ti/j721e-csi2rx/ + TI DAVINCI MACHINE SUPPORT M: Sekhar Nori R: Bartosz Golaszewski diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig index 157c924686e4..732a942b3b29 100644 --- a/drivers/media/platform/Kconfig +++ b/drivers/media/platform/Kconfig @@ -200,6 +200,18 @@ config VIDEO_TI_CAL_MC endif # VIDEO_TI_CAL +config VIDEO_TI_J721E_CSI2RX + tristate "TI J721E CSI2RX wrapper layer driver" + depends on VIDEO_DEV && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API + depends on MEDIA_SUPPORT && MEDIA_CONTROLLER + depends on PHY_CADENCE_DPHY && VIDEO_CADENCE_CSI2RX + depends on ARCH_K3 || COMPILE_TEST + select VIDEOBUF2_DMA_CONTIG + select V4L2_FWNODE + help + Support for TI CSI2RX wrapper layer. This just enables the wrapper driver. + The Cadence CSI2RX bridge driver needs to be enabled separately. + endif # V4L_PLATFORM_DRIVERS menuconfig V4L_MEM2MEM_DRIVERS diff --git a/drivers/media/platform/ti/Makefile b/drivers/media/platform/ti/Makefile index bbc737ccbbea..17c9cfb74f66 100644 --- a/drivers/media/platform/ti/Makefile +++ b/drivers/media/platform/ti/Makefile @@ -1,3 +1,4 @@ # SPDX-License-Identifier: GPL-2.0 obj-y += cal/ obj-y += vpe/ +obj-y += j721e-csi2rx/ diff --git a/drivers/media/platform/ti/j721e-csi2rx/Makefile b/drivers/media/platform/ti/j721e-csi2rx/Makefile new file mode 100644 index 000000000000..377afc1d6280 --- /dev/null +++ b/drivers/media/platform/ti/j721e-csi2rx/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_VIDEO_TI_J721E_CSI2RX) += j721e-csi2rx.o diff --git a/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c b/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c new file mode 100644 index 000000000000..0e2ce9aa4196 --- /dev/null +++ b/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c @@ -0,0 +1,978 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * TI CSI2 RX driver. + * + * Copyright (C) 2021 Texas Instruments Incorporated - https://www.ti.com/ + * + * Author: Pratyush Yadav + */ + +#include +#include +#include +#include +#include + +#include +#include +#include + +#define TI_CSI2RX_MODULE_NAME "j721e-csi2rx" + +#define SHIM_CNTL 0x10 +#define SHIM_CNTL_PIX_RST BIT(0) + +#define SHIM_DMACNTX 0x20 +#define SHIM_DMACNTX_EN BIT(31) +#define SHIM_DMACNTX_YUV422 GENMASK(27, 26) +#define SHIM_DMACNTX_FMT GENMASK(5, 0) +#define SHIM_DMACNTX_UYVY 0 +#define SHIM_DMACNTX_VYUY 1 +#define SHIM_DMACNTX_YUYV 2 +#define SHIM_DMACNTX_YVYU 3 + +#define SHIM_PSI_CFG0 0x24 +#define SHIM_PSI_CFG0_SRC_TAG GENMASK(15, 0) +#define SHIM_PSI_CFG0_DST_TAG GENMASK(31, 15) + +#define CSI_DF_YUV420 0x18 +#define CSI_DF_YUV422 0x1e +#define CSI_DF_RGB444 0x20 +#define CSI_DF_RGB888 0x24 + +#define PSIL_WORD_SIZE_BYTES 16 + +struct ti_csi2rx_fmt { + u32 fourcc; /* Four character code. */ + u32 code; /* Mbus code. */ + enum v4l2_colorspace colorspace; + u32 csi_df; /* CSI Data format. */ + u8 bpp; /* Bits per pixel. */ +}; + +struct ti_csi2rx_buffer { + /* Common v4l2 buffer. Must be first. */ + struct vb2_v4l2_buffer vb; + struct list_head list; + struct ti_csi2rx_dev *csi; +}; + +enum ti_csi2rx_dma_state { + TI_CSI2RX_DMA_STOPPED, /* Streaming not started yet. */ + TI_CSI2RX_DMA_IDLE, /* Streaming but no pending DMA operation. */ + TI_CSI2RX_DMA_ACTIVE, /* Streaming and pending DMA operation. */ +}; + +struct ti_csi2rx_dma { + /* Protects all fields in this struct. */ + spinlock_t lock; + struct dma_chan *chan; + /* Buffers queued to the driver, waiting to be processed by DMA. */ + struct list_head queue; + enum ti_csi2rx_dma_state state; + /* + * Current buffer being processed by DMA. NULL if no buffer is being + * processed. + */ + struct ti_csi2rx_buffer *curr; +}; + +struct ti_csi2rx_dev { + struct device *dev; + void __iomem *shim; + struct v4l2_device v4l2_dev; + struct video_device vdev; + struct media_device mdev; + struct media_pipeline pipe; + struct media_pad pad; + struct v4l2_async_notifier notifier; + struct v4l2_subdev *subdev; + struct vb2_queue vidq; + struct mutex mutex; /* To serialize ioctls. */ + struct v4l2_format v_fmt; + struct ti_csi2rx_dma dma; + u32 sequence; +}; + +static const struct ti_csi2rx_fmt formats[] = { + { + .fourcc = V4L2_PIX_FMT_YUYV, + .code = MEDIA_BUS_FMT_YUYV8_2X8, + .colorspace = V4L2_COLORSPACE_SRGB, + .csi_df = CSI_DF_YUV422, + .bpp = 16, + }, { + .fourcc = V4L2_PIX_FMT_UYVY, + .code = MEDIA_BUS_FMT_UYVY8_2X8, + .colorspace = V4L2_COLORSPACE_SRGB, + .csi_df = CSI_DF_YUV422, + .bpp = 16, + }, { + .fourcc = V4L2_PIX_FMT_YVYU, + .code = MEDIA_BUS_FMT_YVYU8_2X8, + .colorspace = V4L2_COLORSPACE_SRGB, + .csi_df = CSI_DF_YUV422, + .bpp = 16, + }, { + .fourcc = V4L2_PIX_FMT_VYUY, + .code = MEDIA_BUS_FMT_VYUY8_2X8, + .colorspace = V4L2_COLORSPACE_SRGB, + .csi_df = CSI_DF_YUV422, + .bpp = 16, + }, + + /* More formats can be supported but they are not listed for now. */ +}; + +static const unsigned int num_formats = ARRAY_SIZE(formats); + +/* Forward declaration needed by ti_csi2rx_dma_callback. */ +static int ti_csi2rx_start_dma(struct ti_csi2rx_dev *csi, + struct ti_csi2rx_buffer *buf); + +static const struct ti_csi2rx_fmt *find_format_by_pix(u32 pixelformat) +{ + unsigned int i; + + for (i = 0; i < num_formats; i++) { + if (formats[i].fourcc == pixelformat) + return &formats[i]; + } + + return NULL; +} + +static void ti_csi2rx_fill_fmt(const struct ti_csi2rx_fmt *csi_fmt, + struct v4l2_format *v4l2_fmt) +{ + struct v4l2_pix_format *pix = &v4l2_fmt->fmt.pix; + u32 bpl; + + v4l2_fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + pix->pixelformat = csi_fmt->fourcc; + pix->colorspace = csi_fmt->colorspace; + pix->sizeimage = pix->height * pix->width * (csi_fmt->bpp / 8); + + bpl = (pix->width * ALIGN(csi_fmt->bpp, 8)) >> 3; + pix->bytesperline = ALIGN(bpl, 16); +} + +static int ti_csi2rx_querycap(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + struct ti_csi2rx_dev *csi = video_drvdata(file); + + strscpy(cap->driver, TI_CSI2RX_MODULE_NAME, sizeof(cap->driver)); + strscpy(cap->card, TI_CSI2RX_MODULE_NAME, sizeof(cap->card)); + + snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s", + dev_name(csi->dev)); + + return 0; +} + +static int ti_csi2rx_enum_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + if (f->index >= num_formats) + return -EINVAL; + + memset(f->reserved, 0, sizeof(f->reserved)); + f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + f->pixelformat = formats[f->index].fourcc; + + return 0; +} + +static int ti_csi2rx_g_fmt_vid_cap(struct file *file, void *prov, + struct v4l2_format *f) +{ + struct ti_csi2rx_dev *csi = video_drvdata(file); + + *f = csi->v_fmt; + + return 0; +} + +static int ti_csi2rx_try_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + const struct ti_csi2rx_fmt *fmt; + + /* + * Default to the first format if the requested pixel format code isn't + * supported. + */ + fmt = find_format_by_pix(f->fmt.pix.pixelformat); + if (!fmt) + fmt = &formats[0]; + + if (f->fmt.pix.field == V4L2_FIELD_ANY) + f->fmt.pix.field = V4L2_FIELD_NONE; + + if (f->fmt.pix.field != V4L2_FIELD_NONE) + return -EINVAL; + + ti_csi2rx_fill_fmt(fmt, f); + + return 0; +} + +static int ti_csi2rx_s_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct ti_csi2rx_dev *csi = video_drvdata(file); + struct vb2_queue *q = &csi->vidq; + int ret; + + if (vb2_is_busy(q)) + return -EBUSY; + + ret = ti_csi2rx_try_fmt_vid_cap(file, priv, f); + if (ret < 0) + return ret; + + csi->v_fmt = *f; + + return 0; +} + +static int ti_csi2rx_enum_framesizes(struct file *file, void *fh, + struct v4l2_frmsizeenum *fsize) +{ + const struct ti_csi2rx_fmt *fmt; + u8 bpp; + + fmt = find_format_by_pix(fsize->pixel_format); + if (!fmt) + return -EINVAL; + + bpp = ALIGN(fmt->bpp, 8); + + fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE; + fsize->stepwise.min_width = PSIL_WORD_SIZE_BYTES * 8 / bpp; + fsize->stepwise.max_width = UINT_MAX; + fsize->stepwise.step_width = PSIL_WORD_SIZE_BYTES * 8 / bpp; + fsize->stepwise.min_height = 1; + fsize->stepwise.max_height = UINT_MAX; + fsize->stepwise.step_height = 1; + + return 0; +} + +static const struct v4l2_ioctl_ops csi_ioctl_ops = { + .vidioc_querycap = ti_csi2rx_querycap, + .vidioc_enum_fmt_vid_cap = ti_csi2rx_enum_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = ti_csi2rx_try_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = ti_csi2rx_g_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = ti_csi2rx_s_fmt_vid_cap, + .vidioc_enum_framesizes = ti_csi2rx_enum_framesizes, + .vidioc_reqbufs = vb2_ioctl_reqbufs, + .vidioc_create_bufs = vb2_ioctl_create_bufs, + .vidioc_prepare_buf = vb2_ioctl_prepare_buf, + .vidioc_querybuf = vb2_ioctl_querybuf, + .vidioc_qbuf = vb2_ioctl_qbuf, + .vidioc_dqbuf = vb2_ioctl_dqbuf, + .vidioc_expbuf = vb2_ioctl_expbuf, + .vidioc_streamon = vb2_ioctl_streamon, + .vidioc_streamoff = vb2_ioctl_streamoff, +}; + +static const struct v4l2_file_operations csi_fops = { + .owner = THIS_MODULE, + .open = v4l2_fh_open, + .release = vb2_fop_release, + .read = vb2_fop_read, + .poll = vb2_fop_poll, + .unlocked_ioctl = video_ioctl2, + .mmap = vb2_fop_mmap, +}; + +static int ti_csi2rx_video_register(struct ti_csi2rx_dev *csi) +{ + struct video_device *vdev = &csi->vdev; + int ret, src_pad; + + ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1); + if (ret) + return ret; + + src_pad = media_entity_get_fwnode_pad(&csi->subdev->entity, + csi->subdev->fwnode, + MEDIA_PAD_FL_SOURCE); + if (src_pad < 0) { + dev_err(csi->dev, "Couldn't find source pad for subdev\n"); + return src_pad; + } + + ret = media_create_pad_link(&csi->subdev->entity, src_pad, + &vdev->entity, 0, + MEDIA_LNK_FL_IMMUTABLE | + MEDIA_LNK_FL_ENABLED); + if (ret) { + video_unregister_device(vdev); + return ret; + } + + return 0; +} + +static int csi_async_notifier_bound(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *subdev, + struct v4l2_async_subdev *asd) +{ + struct ti_csi2rx_dev *csi = dev_get_drvdata(notifier->v4l2_dev->dev); + + csi->subdev = subdev; + + return 0; +} + +static int csi_async_notifier_complete(struct v4l2_async_notifier *notifier) +{ + struct ti_csi2rx_dev *csi = dev_get_drvdata(notifier->v4l2_dev->dev); + int ret; + + ret = ti_csi2rx_video_register(csi); + if (ret) + return ret; + + return v4l2_device_register_subdev_nodes(&csi->v4l2_dev); +} + +static const struct v4l2_async_notifier_operations csi_async_notifier_ops = { + .bound = csi_async_notifier_bound, + .complete = csi_async_notifier_complete, +}; + +static int ti_csi2rx_init_subdev(struct ti_csi2rx_dev *csi) +{ + struct fwnode_handle *fwnode; + struct v4l2_async_subdev *asd; + struct device_node *node; + int ret; + + node = of_get_child_by_name(csi->dev->of_node, "csi-bridge"); + if (!node) + return -EINVAL; + + fwnode = of_fwnode_handle(node); + if (!fwnode) { + of_node_put(node); + return -EINVAL; + } + + v4l2_async_notifier_init(&csi->notifier); + csi->notifier.ops = &csi_async_notifier_ops; + + asd = v4l2_async_notifier_add_fwnode_subdev(&csi->notifier, fwnode, + struct v4l2_async_subdev); + of_node_put(node); + if (IS_ERR(asd)) { + v4l2_async_notifier_cleanup(&csi->notifier); + return PTR_ERR(asd); + } + + ret = v4l2_async_notifier_register(&csi->v4l2_dev, &csi->notifier); + if (ret) { + v4l2_async_notifier_cleanup(&csi->notifier); + return ret; + } + + return 0; +} + +static void ti_csi2rx_setup_shim(struct ti_csi2rx_dev *csi) +{ + const struct ti_csi2rx_fmt *fmt; + unsigned int reg; + + fmt = find_format_by_pix(csi->v_fmt.fmt.pix.pixelformat); + if (!fmt) { + dev_err(csi->dev, "Unknown format\n"); + return; + } + + /* De-assert the pixel interface reset. */ + reg = SHIM_CNTL_PIX_RST; + writel(reg, csi->shim + SHIM_CNTL); + + reg = SHIM_DMACNTX_EN; + reg |= FIELD_PREP(SHIM_DMACNTX_FMT, fmt->csi_df); + + /* + * Using the values from the documentation gives incorrect ordering for + * the luma and chroma components. In practice, the "reverse" format + * gives the correct image. So for example, if the image is in UYVY, the + * reverse would be YVYU. + */ + switch (fmt->fourcc) { + case V4L2_PIX_FMT_UYVY: + reg |= FIELD_PREP(SHIM_DMACNTX_YUV422, + SHIM_DMACNTX_YVYU); + break; + case V4L2_PIX_FMT_VYUY: + reg |= FIELD_PREP(SHIM_DMACNTX_YUV422, + SHIM_DMACNTX_YUYV); + break; + case V4L2_PIX_FMT_YUYV: + reg |= FIELD_PREP(SHIM_DMACNTX_YUV422, + SHIM_DMACNTX_VYUY); + break; + case V4L2_PIX_FMT_YVYU: + reg |= FIELD_PREP(SHIM_DMACNTX_YUV422, + SHIM_DMACNTX_UYVY); + break; + default: + /* Ignore if not YUV 4:2:2 */ + break; + } + + writel(reg, csi->shim + SHIM_DMACNTX); + + reg = FIELD_PREP(SHIM_PSI_CFG0_SRC_TAG, 0) | + FIELD_PREP(SHIM_PSI_CFG0_DST_TAG, 1); + writel(reg, csi->shim + SHIM_PSI_CFG0); +} + +static void ti_csi2rx_dma_callback(void *param) +{ + struct ti_csi2rx_buffer *buf = param; + struct ti_csi2rx_dev *csi = buf->csi; + struct ti_csi2rx_dma *dma = &csi->dma; + unsigned long flags = 0; + + buf->vb.vb2_buf.timestamp = ktime_get_ns(); + buf->vb.sequence = csi->sequence++; + + spin_lock_irqsave(&dma->lock, flags); + + WARN_ON(dma->curr != buf); + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE); + + /* If there are more buffers to process then start their transfer. */ + dma->curr = NULL; + while (!list_empty(&dma->queue)) { + buf = list_entry(dma->queue.next, struct ti_csi2rx_buffer, list); + list_del(&buf->list); + + if (ti_csi2rx_start_dma(csi, buf)) { + dev_err(csi->dev, "Failed to queue the next buffer for DMA\n"); + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); + } else { + dma->curr = buf; + break; + } + } + + if (!dma->curr) + dma->state = TI_CSI2RX_DMA_IDLE; + + spin_unlock_irqrestore(&dma->lock, flags); +} + +static int ti_csi2rx_start_dma(struct ti_csi2rx_dev *csi, + struct ti_csi2rx_buffer *buf) +{ + unsigned long addr; + struct dma_async_tx_descriptor *desc; + size_t len = csi->v_fmt.fmt.pix.sizeimage; + dma_cookie_t cookie; + int ret = 0; + + addr = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0); + desc = dmaengine_prep_slave_single(csi->dma.chan, addr, len, + DMA_DEV_TO_MEM, + DMA_PREP_INTERRUPT | DMA_CTRL_ACK); + if (!desc) + return -EIO; + + desc->callback = ti_csi2rx_dma_callback; + desc->callback_param = buf; + + cookie = dmaengine_submit(desc); + ret = dma_submit_error(cookie); + if (ret) + return ret; + + dma_async_issue_pending(csi->dma.chan); + + return 0; +} + +static int ti_csi2rx_queue_setup(struct vb2_queue *q, unsigned int *nbuffers, + unsigned int *nplanes, unsigned int sizes[], + struct device *alloc_devs[]) +{ + struct ti_csi2rx_dev *csi = vb2_get_drv_priv(q); + unsigned int size = csi->v_fmt.fmt.pix.sizeimage; + + if (*nplanes) { + if (sizes[0] < size) + return -EINVAL; + size = sizes[0]; + } + + *nplanes = 1; + sizes[0] = size; + + return 0; +} + +static int ti_csi2rx_buffer_prepare(struct vb2_buffer *vb) +{ + struct ti_csi2rx_dev *csi = vb2_get_drv_priv(vb->vb2_queue); + unsigned long size = csi->v_fmt.fmt.pix.sizeimage; + + if (vb2_plane_size(vb, 0) < size) { + dev_err(csi->dev, "Data will not fit into plane\n"); + return -EINVAL; + } + + vb2_set_plane_payload(vb, 0, size); + return 0; +} + +static void ti_csi2rx_buffer_queue(struct vb2_buffer *vb) +{ + struct ti_csi2rx_dev *csi = vb2_get_drv_priv(vb->vb2_queue); + struct ti_csi2rx_buffer *buf; + struct ti_csi2rx_dma *dma = &csi->dma; + unsigned long flags = 0; + int ret; + + buf = container_of(vb, struct ti_csi2rx_buffer, vb.vb2_buf); + buf->csi = csi; + + spin_lock_irqsave(&dma->lock, flags); + /* + * Usually the DMA callback takes care of queueing the pending buffers. + * But if DMA has stalled due to lack of buffers, restart it now. + */ + if (dma->state == TI_CSI2RX_DMA_IDLE) { + ret = ti_csi2rx_start_dma(csi, buf); + if (ret) { + dev_err(csi->dev, "Failed to start DMA: %d\n", ret); + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED); + goto unlock; + } + + dma->curr = buf; + dma->state = TI_CSI2RX_DMA_ACTIVE; + } else { + list_add_tail(&buf->list, &dma->queue); + } + +unlock: + spin_unlock_irqrestore(&dma->lock, flags); +} + +/* + * Find the input format. This is done by finding the first device in the + * pipeline which can tell us the current format. This could be the sensor, or + * this could be another device in the middle which is capable of format + * conversions. + */ +static int ti_csi2rx_validate_pipeline(struct ti_csi2rx_dev *csi) +{ + struct media_pipeline *pipe = &csi->pipe; + struct media_entity *entity; + struct v4l2_subdev *sd; + struct v4l2_subdev_format fmt; + struct v4l2_pix_format *pix = &csi->v_fmt.fmt.pix; + const struct ti_csi2rx_fmt *ti_fmt; + int ret; + + media_graph_walk_start(&pipe->graph, &csi->vdev.entity); + + while ((entity = media_graph_walk_next(&pipe->graph))) { + if (!is_media_entity_v4l2_subdev(entity)) + continue; + + sd = media_entity_to_v4l2_subdev(entity); + + fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; + fmt.pad = media_get_pad_index(entity, 0, PAD_SIGNAL_DEFAULT); + + ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt); + if (ret && ret != -ENOIOCTLCMD) + return ret; + if (!ret) + break; + } + + /* Could not find input format. */ + if (!entity) + return -EPIPE; + + if (fmt.format.width != pix->width) + return -EPIPE; + if (fmt.format.height != pix->height) + return -EPIPE; + + ti_fmt = find_format_by_pix(pix->pixelformat); + if (WARN_ON(!ti_fmt)) + return -EINVAL; + + if (fmt.format.code == MEDIA_BUS_FMT_YUYV8_2X8 || + fmt.format.code == MEDIA_BUS_FMT_VYUY8_2X8 || + fmt.format.code == MEDIA_BUS_FMT_YVYU8_2X8) { + dev_err(csi->dev, + "Only UYVY input allowed for YUV422 8-bit. Output format can be configured.\n"); + return -EPIPE; + } + + if (fmt.format.code == MEDIA_BUS_FMT_UYVY8_2X8) { + /* Format conversion between YUV422 formats can be done. */ + if (ti_fmt->code != MEDIA_BUS_FMT_UYVY8_2X8 && + ti_fmt->code != MEDIA_BUS_FMT_YUYV8_2X8 && + ti_fmt->code != MEDIA_BUS_FMT_VYUY8_2X8 && + ti_fmt->code != MEDIA_BUS_FMT_YVYU8_2X8) + return -EPIPE; + } else if (fmt.format.code != ti_fmt->code) { + return -EPIPE; + } + + if (fmt.format.field != V4L2_FIELD_NONE && + fmt.format.field != V4L2_FIELD_ANY) + return -EPIPE; + + return 0; +} + +static int ti_csi2rx_start_streaming(struct vb2_queue *vq, unsigned int count) +{ + struct ti_csi2rx_dev *csi = vb2_get_drv_priv(vq); + struct ti_csi2rx_dma *dma = &csi->dma; + struct ti_csi2rx_buffer *buf, *tmp; + unsigned long flags = 0; + int ret = 0; + + spin_lock_irqsave(&dma->lock, flags); + if (list_empty(&dma->queue)) + ret = -EIO; + spin_unlock_irqrestore(&dma->lock, flags); + if (ret) + return ret; + + ret = media_pipeline_start(&csi->vdev.entity, &csi->pipe); + if (ret) + return ret; + + ret = ti_csi2rx_validate_pipeline(csi); + if (ret) { + dev_err(csi->dev, + "Format mismatch between source and video node\n"); + goto err; + } + + ti_csi2rx_setup_shim(csi); + + ret = v4l2_subdev_call(csi->subdev, video, s_stream, 1); + if (ret) + goto err; + + csi->sequence = 0; + + spin_lock_irqsave(&dma->lock, flags); + buf = list_entry(dma->queue.next, struct ti_csi2rx_buffer, list); + list_del(&buf->list); + dma->state = TI_CSI2RX_DMA_ACTIVE; + + ret = ti_csi2rx_start_dma(csi, buf); + if (ret) { + dev_err(csi->dev, "Failed to start DMA: %d\n", ret); + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED); + spin_unlock_irqrestore(&dma->lock, flags); + goto err_stream; + } + + dma->curr = buf; + spin_unlock_irqrestore(&dma->lock, flags); + + return 0; + +err_stream: + v4l2_subdev_call(csi->subdev, video, s_stream, 0); +err: + media_pipeline_stop(&csi->vdev.entity); + + spin_lock_irqsave(&dma->lock, flags); + list_for_each_entry_safe(buf, tmp, &dma->queue, list) { + list_del(&buf->list); + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED); + } + csi->dma.state = TI_CSI2RX_DMA_STOPPED; + spin_unlock_irqrestore(&dma->lock, flags); + + return ret; +} + +static void ti_csi2rx_stop_streaming(struct vb2_queue *vq) +{ + struct ti_csi2rx_dev *csi = vb2_get_drv_priv(vq); + struct ti_csi2rx_buffer *buf = NULL, *tmp; + struct ti_csi2rx_dma *dma = &csi->dma; + unsigned long flags = 0; + int ret; + + media_pipeline_stop(&csi->vdev.entity); + + ret = v4l2_subdev_call(csi->subdev, video, s_stream, 0); + if (ret) + dev_err(csi->dev, "Failed to stop subdev stream\n"); + + writel(0, csi->shim + SHIM_CNTL); + + ret = dmaengine_terminate_sync(csi->dma.chan); + if (ret) + dev_err(csi->dev, "Failed to stop DMA\n"); + + writel(0, csi->shim + SHIM_DMACNTX); + + spin_lock_irqsave(&dma->lock, flags); + list_for_each_entry_safe(buf, tmp, &csi->dma.queue, list) { + list_del(&buf->list); + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); + } + + if (dma->curr) + vb2_buffer_done(&dma->curr->vb.vb2_buf, VB2_BUF_STATE_ERROR); + + dma->curr = NULL; + dma->state = TI_CSI2RX_DMA_STOPPED; + spin_unlock_irqrestore(&dma->lock, flags); +} + +static const struct vb2_ops csi_vb2_qops = { + .queue_setup = ti_csi2rx_queue_setup, + .buf_prepare = ti_csi2rx_buffer_prepare, + .buf_queue = ti_csi2rx_buffer_queue, + .start_streaming = ti_csi2rx_start_streaming, + .stop_streaming = ti_csi2rx_stop_streaming, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, +}; + +static int ti_csi2rx_init_vb2q(struct ti_csi2rx_dev *csi) +{ + struct vb2_queue *q = &csi->vidq; + int ret; + + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ; + q->drv_priv = csi; + q->buf_struct_size = sizeof(struct ti_csi2rx_buffer); + q->ops = &csi_vb2_qops; + q->mem_ops = &vb2_dma_contig_memops; + q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + q->dev = dmaengine_get_dma_device(csi->dma.chan); + q->lock = &csi->mutex; + + ret = vb2_queue_init(q); + if (ret) + return ret; + + csi->vdev.queue = q; + + return 0; +} + +static int ti_csi2rx_init_dma(struct ti_csi2rx_dev *csi) +{ + struct dma_slave_config cfg; + int ret; + + INIT_LIST_HEAD(&csi->dma.queue); + spin_lock_init(&csi->dma.lock); + + csi->dma.state = TI_CSI2RX_DMA_STOPPED; + + csi->dma.chan = dma_request_chan(csi->dev, "rx0"); + if (IS_ERR(csi->dma.chan)) + return PTR_ERR(csi->dma.chan); + + memset(&cfg, 0, sizeof(cfg)); + + cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_16_BYTES; + + ret = dmaengine_slave_config(csi->dma.chan, &cfg); + if (ret) + return ret; + + return 0; +} + +static int ti_csi2rx_v4l2_init(struct ti_csi2rx_dev *csi) +{ + struct media_device *mdev = &csi->mdev; + struct video_device *vdev = &csi->vdev; + const struct ti_csi2rx_fmt *fmt; + struct v4l2_pix_format *pix_fmt = &csi->v_fmt.fmt.pix; + int ret; + + fmt = find_format_by_pix(V4L2_PIX_FMT_UYVY); + if (!fmt) + return -EINVAL; + + pix_fmt->width = 640; + pix_fmt->height = 480; + + ti_csi2rx_fill_fmt(fmt, &csi->v_fmt); + + mdev->dev = csi->dev; + mdev->hw_revision = 1; + strscpy(mdev->model, "TI-CSI2RX", sizeof(mdev->model)); + snprintf(mdev->bus_info, sizeof(mdev->bus_info), "platform:%s", + dev_name(mdev->dev)); + + media_device_init(mdev); + + strscpy(vdev->name, TI_CSI2RX_MODULE_NAME, sizeof(vdev->name)); + vdev->v4l2_dev = &csi->v4l2_dev; + vdev->vfl_dir = VFL_DIR_RX; + vdev->fops = &csi_fops; + vdev->ioctl_ops = &csi_ioctl_ops; + vdev->release = video_device_release_empty; + vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | + V4L2_CAP_STREAMING | V4L2_CAP_IO_MC; + vdev->lock = &csi->mutex; + video_set_drvdata(vdev, csi); + + csi->pad.flags = MEDIA_PAD_FL_SINK; + ret = media_entity_pads_init(&csi->vdev.entity, 1, &csi->pad); + if (ret) + return ret; + + csi->v4l2_dev.mdev = mdev; + + ret = v4l2_device_register(csi->dev, &csi->v4l2_dev); + if (ret) + return ret; + + ret = media_device_register(mdev); + if (ret) { + v4l2_device_unregister(&csi->v4l2_dev); + media_device_cleanup(mdev); + return ret; + } + + return 0; +} + +static void ti_csi2rx_cleanup_dma(struct ti_csi2rx_dev *csi) +{ + dma_release_channel(csi->dma.chan); +} + +static void ti_csi2rx_cleanup_v4l2(struct ti_csi2rx_dev *csi) +{ + media_device_unregister(&csi->mdev); + v4l2_device_unregister(&csi->v4l2_dev); + media_device_cleanup(&csi->mdev); +} + +static void ti_csi2rx_cleanup_subdev(struct ti_csi2rx_dev *csi) +{ + v4l2_async_notifier_unregister(&csi->notifier); + v4l2_async_notifier_cleanup(&csi->notifier); +} + +static void ti_csi2rx_cleanup_vb2q(struct ti_csi2rx_dev *csi) +{ + vb2_queue_release(&csi->vidq); +} + +static int ti_csi2rx_probe(struct platform_device *pdev) +{ + struct ti_csi2rx_dev *csi; + struct resource *res; + int ret; + + csi = devm_kzalloc(&pdev->dev, sizeof(*csi), GFP_KERNEL); + if (!csi) + return -ENOMEM; + + csi->dev = &pdev->dev; + platform_set_drvdata(pdev, csi); + + mutex_init(&csi->mutex); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + csi->shim = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(csi->shim)) + return PTR_ERR(csi->shim); + + ret = ti_csi2rx_init_dma(csi); + if (ret) + return ret; + + ret = ti_csi2rx_v4l2_init(csi); + if (ret) + goto err_dma; + + ret = ti_csi2rx_init_vb2q(csi); + if (ret) + goto err_v4l2; + + ret = ti_csi2rx_init_subdev(csi); + if (ret) + goto err_vb2q; + + ret = of_platform_populate(csi->dev->of_node, NULL, NULL, csi->dev); + if (ret) { + dev_err(csi->dev, "Failed to create children: %d\n", ret); + goto err_subdev; + } + + return 0; + +err_subdev: + ti_csi2rx_cleanup_subdev(csi); +err_vb2q: + ti_csi2rx_cleanup_vb2q(csi); +err_v4l2: + ti_csi2rx_cleanup_v4l2(csi); +err_dma: + ti_csi2rx_cleanup_dma(csi); + return ret; +} + +static int ti_csi2rx_remove(struct platform_device *pdev) +{ + struct ti_csi2rx_dev *csi = platform_get_drvdata(pdev); + + if (vb2_is_busy(&csi->vidq)) + return -EBUSY; + + video_unregister_device(&csi->vdev); + + ti_csi2rx_cleanup_vb2q(csi); + ti_csi2rx_cleanup_subdev(csi); + ti_csi2rx_cleanup_v4l2(csi); + ti_csi2rx_cleanup_dma(csi); + + return 0; +} + +static const struct of_device_id ti_csi2rx_of_match[] = { + { .compatible = "ti,j721e-csi2rx", }, + { }, +}; +MODULE_DEVICE_TABLE(of, ti_csi2rx_of_match); + +static struct platform_driver ti_csi2rx_pdrv = { + .probe = ti_csi2rx_probe, + .remove = ti_csi2rx_remove, + .driver = { + .name = TI_CSI2RX_MODULE_NAME, + .of_match_table = ti_csi2rx_of_match, + }, +}; + +module_platform_driver(ti_csi2rx_pdrv); + +MODULE_DESCRIPTION("TI J721E CSI2 RX Driver"); +MODULE_AUTHOR("Pratyush Yadav "); +MODULE_LICENSE("GPL v2"); +MODULE_VERSION("1.0"); From patchwork Thu Jun 24 19:21:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pratyush Yadav X-Patchwork-Id: 466551 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 A7A22C49EA6 for ; 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Thu, 24 Jun 2021 14:22:52 -0500 Received: from DFLE102.ent.ti.com (10.64.6.23) by DFLE109.ent.ti.com (10.64.6.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Thu, 24 Jun 2021 14:22:52 -0500 Received: from fllv0040.itg.ti.com (10.64.41.20) by DFLE102.ent.ti.com (10.64.6.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2 via Frontend Transport; Thu, 24 Jun 2021 14:22:52 -0500 Received: from pratyush-OptiPlex-790.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 15OJM14Q120548; Thu, 24 Jun 2021 14:22:49 -0500 From: Pratyush Yadav To: Mauro Carvalho Chehab CC: Laurent Pinchart , Vignesh Raghavendra , Tomi Valkeinen , Nikhil Devshatwar , Pratyush Yadav , Rob Herring , , , Subject: [PATCH v3 10/11] media: dt-bindings: Add DT bindings for TI J721E CSI2RX driver Date: Fri, 25 Jun 2021 00:51:59 +0530 Message-ID: <20210624192200.22559-11-p.yadav@ti.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210624192200.22559-1-p.yadav@ti.com> References: <20210624192200.22559-1-p.yadav@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org TI's J721E uses the Cadence CSI2RX and DPHY peripherals to facilitate capture over a CSI-2 bus. The TI CSI2RX platform driver glues all the parts together. Signed-off-by: Pratyush Yadav --- (no changes since v2) Changes in v2: - Rename to ti,j721e-csi2rx.yaml - Add an entry in MAINTAINERS. - Add a description for the binding. - Change compatible to ti,j721e-csi2rx to make it SoC specific. - Remove description from dmas, reg, power-domains. - Remove a limit of 2 from #address-cells and #size-cells. - Fix add ^ to csi-bridge subnode regex. - Make ranges mandatory. - Add unit address in example. - Add a reference to cdns,csi2rx in csi-bridge subnode. - Expand the example to include the csi-bridge subnode as well. - Re-order subject prefixes. .../bindings/media/ti,j721e-csi2rx.yaml | 101 ++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 102 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/ti,j721e-csi2rx.yaml diff --git a/Documentation/devicetree/bindings/media/ti,j721e-csi2rx.yaml b/Documentation/devicetree/bindings/media/ti,j721e-csi2rx.yaml new file mode 100644 index 000000000000..db87cfd65bed --- /dev/null +++ b/Documentation/devicetree/bindings/media/ti,j721e-csi2rx.yaml @@ -0,0 +1,101 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/media/ti,j721e-csi2rx.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: TI J721E CSI2RX Wrapper Device Tree Bindings + +description: | + The TI J721E CSI2RX Wrapper is a wrapper around Cadence CSI2RX bridge that + enables sending captured frames to memory over PSI-L DMA. In the J721E + Technical Reference Manual (SPRUIL1B) it is referred to as "SHIM" under the + CSI_RX_IF section. + +maintainers: + - Pratyush Yadav + +properties: + compatible: + items: + - const: ti,j721e-csi2rx + + dmas: + maxItems: 1 + + dma-names: + items: + - const: rx0 + + reg: + maxItems: 1 + + power-domains: + maxItems: 1 + + ranges: true + + "#address-cells": true + + "#size-cells": true + +patternProperties: + "^csi-bridge@": + type: object + description: CSI2 bridge node. + $ref: cdns,csi2rx.yaml# + +required: + - compatible + - reg + - dmas + - dma-names + - power-domains + - ranges + - "#address-cells" + - "#size-cells" + +additionalProperties: false + +examples: + - | + #include + + ti_csi2rx0: ticsi2rx@4500000 { + compatible = "ti,j721e-csi2rx"; + dmas = <&main_udmap 0x4940>; + dma-names = "rx0"; + reg = <0x4500000 0x1000>; + power-domains = <&k3_pds 26 TI_SCI_PD_EXCLUSIVE>; + #address-cells = <1>; + #size-cells = <1>; + ranges; + + cdns_csi2rx: csi-bridge@4504000 { + compatible = "cdns,csi2rx"; + reg = <0x4504000 0x1000>; + clocks = <&k3_clks 26 2>, <&k3_clks 26 0>, <&k3_clks 26 2>, + <&k3_clks 26 2>, <&k3_clks 26 3>, <&k3_clks 26 3>; + clock-names = "sys_clk", "p_clk", "pixel_if0_clk", + "pixel_if1_clk", "pixel_if2_clk", "pixel_if3_clk"; + phys = <&dphy0>; + phy-names = "dphy"; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + csi2_0: port@0 { + + reg = <0>; + + csi2rx0_in_sensor: endpoint { + remote-endpoint = <&csi2_cam0>; + bus-type = <4>; /* CSI2 DPHY. */ + clock-lanes = <0>; + data-lanes = <1 2>; + }; + }; + }; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 96f002b9046d..e9b110115e5f 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -18471,6 +18471,7 @@ TI J721E CSI2RX DRIVER M: Pratyush Yadav L: linux-media@vger.kernel.org S: Supported +F: Documentation/devicetree/bindings/media/ti,j721e-csi2rx.yaml F: drivers/media/platform/ti/j721e-csi2rx/ TI DAVINCI MACHINE SUPPORT