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Mon, 28 Jun 2021 08:19:52 +0000 Subject: Re: [RFC PATCH 2/9] drm: bridge: Add Samsung SEC MIPI DSIM bridge driver To: Krzysztof Kozlowski , Fabio Estevam , Laurent Pinchart , Michael Tretter Cc: Jagan Teki , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , Peng Fan , Francis Laniel , Matteo Lisi , Neil Armstrong , linux-amarula , Tomasz Figa , linux-kernel , Robert Foss , Andrzej Hajda , DRI mailing list , Milco Pratesi , Anthony Brandon , linux-phy@lists.infradead.org, Fancy Fang , Shawn Guo , Sascha Hauer , "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" , NXP Linux Team , "marex@denx.de" , Daniel Vetter References: <20210621072424.111733-1-jagan@amarulasolutions.com> <20210621072424.111733-3-jagan@amarulasolutions.com> <2decfea3-3659-2a3b-7706-326c97f57f8e@canonical.com> From: Frieder Schrempf Message-ID: <3aa47f60-94ab-cf0f-3777-3a872dd0e6d4@kontron.de> Date: Mon, 28 Jun 2021 10:19:50 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 In-Reply-To: <2decfea3-3659-2a3b-7706-326c97f57f8e@canonical.com> Content-Type: text/plain; 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Can we leverage >>> that driver instead of adding a new one for the same IP core ? >> >> Yes. there was an attempt from Michael in this direction: >> https://eur04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpatchwork.kernel.org%2Fproject%2Fdri-devel%2Fcover%2F20200911135413.3654800-1-m.tretter%40pengutronix.de%2F&data=04%7C01%7Cfrieder.schrempf%40kontron.de%7C52db05459ef0462d5a9b08d936eab1ba%7C8c9d3c973fd941c8a2b1646f3942daf1%7C0%7C0%7C637601203901391193%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=LTYk9kpUeB9bgfRITQT6wIij3XTOIk37AHXbzQ2UI4Y%3D&reserved=0 > > That's the proper direction (maybe as Marek suggested - sharing common > code like for Analogix DP), not duplicating a driver. > Just to make sure that you are aware of the previous patches and discussions here are some additional pointers: * i.MX8MM glue code from Marek (+ Cc): [1] * DPHY driver from Marek: [2] * General discussion about driver implementation: [3] * Daniel's (+ Cc) suggested direction to move forward: [4] It looks like you already did a fork of the Exynos driver, so your approach might be generally in line with what Daniel suggested. Best regards Frieder [1] https://patchwork.kernel.org/project/linux-arm-kernel/patch/20201005134250.527153-3-marex@denx.de/ [2] https://patchwork.kernel.org/project/linux-arm-kernel/patch/20201003225020.164358-1-marex@denx.de/ [3] https://patchwork.kernel.org/project/dri-devel/patch/20200911135413.3654800-11-m.tretter@pengutronix.de/ [4] https://patchwork.kernel.org/project/dri-devel/patch/20200911135413.3654800-11-m.tretter@pengutronix.de/#23995147 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=-5.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MSGID_FROM_MTA_HEADER,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=no 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 A0075C2B9F4 for ; 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dkim=none (message not signed) header.d=none;intel.com; dmarc=none action=none header.from=kontron.de; Received: from AM0PR10MB2963.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:208:157::14) by AM0PR10MB2530.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:208:dd::28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4264.24; Mon, 28 Jun 2021 08:19:52 +0000 Received: from AM0PR10MB2963.EURPRD10.PROD.OUTLOOK.COM ([fe80::1133:8761:6cc9:9703]) by AM0PR10MB2963.EURPRD10.PROD.OUTLOOK.COM ([fe80::1133:8761:6cc9:9703%5]) with mapi id 15.20.4264.026; Mon, 28 Jun 2021 08:19:52 +0000 Subject: Re: [RFC PATCH 2/9] drm: bridge: Add Samsung SEC MIPI DSIM bridge driver To: Krzysztof Kozlowski , Fabio Estevam , Laurent Pinchart , Michael Tretter Cc: Jagan Teki , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , Peng Fan , Francis Laniel , Matteo Lisi , Neil Armstrong , linux-amarula , Tomasz Figa , linux-kernel , Robert Foss , Andrzej Hajda , DRI mailing list , Milco Pratesi , Anthony Brandon , linux-phy@lists.infradead.org, Fancy Fang , Shawn Guo , Sascha Hauer , "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" , NXP Linux Team , "marex@denx.de" , Daniel Vetter References: <20210621072424.111733-1-jagan@amarulasolutions.com> <20210621072424.111733-3-jagan@amarulasolutions.com> <2decfea3-3659-2a3b-7706-326c97f57f8e@canonical.com> From: Frieder Schrempf Message-ID: <3aa47f60-94ab-cf0f-3777-3a872dd0e6d4@kontron.de> Date: Mon, 28 Jun 2021 10:19:50 +0200 User-Agent: Mozilla/5.0 (X11; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Jagan, On 24.06.21 10:30, Krzysztof Kozlowski wrote: > On 24/06/2021 04:48, Fabio Estevam wrote: >> Hi Jagan/Laurent, >> >> On Wed, Jun 23, 2021 at 7:23 PM Laurent Pinchart >> wrote: >> >>> Looking at the register set, it seems to match the Exynos 5433, >>> supported by drivers/gpu/drm/exynos/exynos_drm_dsi.c. Can we leverage >>> that driver instead of adding a new one for the same IP core ? >> >> Yes. there was an attempt from Michael in this direction: >> https://eur04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpatchwork.kernel.org%2Fproject%2Fdri-devel%2Fcover%2F20200911135413.3654800-1-m.tretter%40pengutronix.de%2F&data=04%7C01%7Cfrieder.schrempf%40kontron.de%7C52db05459ef0462d5a9b08d936eab1ba%7C8c9d3c973fd941c8a2b1646f3942daf1%7C0%7C0%7C637601203901391193%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=LTYk9kpUeB9bgfRITQT6wIij3XTOIk37AHXbzQ2UI4Y%3D&reserved=0 > > That's the proper direction (maybe as Marek suggested - sharing common > code like for Analogix DP), not duplicating a driver. > Just to make sure that you are aware of the previous patches and discussions here are some additional pointers: * i.MX8MM glue code from Marek (+ Cc): [1] * DPHY driver from Marek: [2] * General discussion about driver implementation: [3] * Daniel's (+ Cc) suggested direction to move forward: [4] It looks like you already did a fork of the Exynos driver, so your approach might be generally in line with what Daniel suggested. Best regards Frieder [1] https://patchwork.kernel.org/project/linux-arm-kernel/patch/20201005134250.527153-3-marex@denx.de/ [2] https://patchwork.kernel.org/project/linux-arm-kernel/patch/20201003225020.164358-1-marex@denx.de/ [3] https://patchwork.kernel.org/project/dri-devel/patch/20200911135413.3654800-11-m.tretter@pengutronix.de/ [4] https://patchwork.kernel.org/project/dri-devel/patch/20200911135413.3654800-11-m.tretter@pengutronix.de/#23995147 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel 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=-5.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MSGID_FROM_MTA_HEADER,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=no 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 556E0C49EAB for ; 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Mon, 28 Jun 2021 08:19:52 +0000 Subject: Re: [RFC PATCH 2/9] drm: bridge: Add Samsung SEC MIPI DSIM bridge driver To: Krzysztof Kozlowski , Fabio Estevam , Laurent Pinchart , Michael Tretter References: <20210621072424.111733-1-jagan@amarulasolutions.com> <20210621072424.111733-3-jagan@amarulasolutions.com> <2decfea3-3659-2a3b-7706-326c97f57f8e@canonical.com> From: Frieder Schrempf Message-ID: <3aa47f60-94ab-cf0f-3777-3a872dd0e6d4@kontron.de> Date: Mon, 28 Jun 2021 10:19:50 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 In-Reply-To: <2decfea3-3659-2a3b-7706-326c97f57f8e@canonical.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [80.147.118.32] X-ClientProxiedBy: AM0PR03CA0011.eurprd03.prod.outlook.com (2603:10a6:208:14::24) To AM0PR10MB2963.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:208:157::14) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [192.168.30.119] (80.147.118.32) by AM0PR03CA0011.eurprd03.prod.outlook.com (2603:10a6:208:14::24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4264.19 via Frontend Transport; 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Can we leverage >>> that driver instead of adding a new one for the same IP core ? >> >> Yes. there was an attempt from Michael in this direction: >> https://eur04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpatchwork.kernel.org%2Fproject%2Fdri-devel%2Fcover%2F20200911135413.3654800-1-m.tretter%40pengutronix.de%2F&data=04%7C01%7Cfrieder.schrempf%40kontron.de%7C52db05459ef0462d5a9b08d936eab1ba%7C8c9d3c973fd941c8a2b1646f3942daf1%7C0%7C0%7C637601203901391193%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=LTYk9kpUeB9bgfRITQT6wIij3XTOIk37AHXbzQ2UI4Y%3D&reserved=0 > > That's the proper direction (maybe as Marek suggested - sharing common > code like for Analogix DP), not duplicating a driver. > Just to make sure that you are aware of the previous patches and discussions here are some additional pointers: * i.MX8MM glue code from Marek (+ Cc): [1] * DPHY driver from Marek: [2] * General discussion about driver implementation: [3] * Daniel's (+ Cc) suggested direction to move forward: [4] It looks like you already did a fork of the Exynos driver, so your approach might be generally in line with what Daniel suggested. Best regards Frieder [1] https://patchwork.kernel.org/project/linux-arm-kernel/patch/20201005134250.527153-3-marex@denx.de/ [2] https://patchwork.kernel.org/project/linux-arm-kernel/patch/20201003225020.164358-1-marex@denx.de/ [3] https://patchwork.kernel.org/project/dri-devel/patch/20200911135413.3654800-11-m.tretter@pengutronix.de/ [4] https://patchwork.kernel.org/project/dri-devel/patch/20200911135413.3654800-11-m.tretter@pengutronix.de/#23995147 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=-5.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MSGID_FROM_MTA_HEADER,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=no 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 7D750C2B9F4 for ; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org Hi Jagan, On 24.06.21 10:30, Krzysztof Kozlowski wrote: > On 24/06/2021 04:48, Fabio Estevam wrote: >> Hi Jagan/Laurent, >> >> On Wed, Jun 23, 2021 at 7:23 PM Laurent Pinchart >> wrote: >> >>> Looking at the register set, it seems to match the Exynos 5433, >>> supported by drivers/gpu/drm/exynos/exynos_drm_dsi.c. Can we leverage >>> that driver instead of adding a new one for the same IP core ? >> >> Yes. there was an attempt from Michael in this direction: >> https://eur04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpatchwork.kernel.org%2Fproject%2Fdri-devel%2Fcover%2F20200911135413.3654800-1-m.tretter%40pengutronix.de%2F&data=04%7C01%7Cfrieder.schrempf%40kontron.de%7C52db05459ef0462d5a9b08d936eab1ba%7C8c9d3c973fd941c8a2b1646f3942daf1%7C0%7C0%7C637601203901391193%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=LTYk9kpUeB9bgfRITQT6wIij3XTOIk37AHXbzQ2UI4Y%3D&reserved=0 > > That's the proper direction (maybe as Marek suggested - sharing common > code like for Analogix DP), not duplicating a driver. > Just to make sure that you are aware of the previous patches and discussions here are some additional pointers: * i.MX8MM glue code from Marek (+ Cc): [1] * DPHY driver from Marek: [2] * General discussion about driver implementation: [3] * Daniel's (+ Cc) suggested direction to move forward: [4] It looks like you already did a fork of the Exynos driver, so your approach might be generally in line with what Daniel suggested. Best regards Frieder [1] https://patchwork.kernel.org/project/linux-arm-kernel/patch/20201005134250.527153-3-marex@denx.de/ [2] https://patchwork.kernel.org/project/linux-arm-kernel/patch/20201003225020.164358-1-marex@denx.de/ [3] https://patchwork.kernel.org/project/dri-devel/patch/20200911135413.3654800-11-m.tretter@pengutronix.de/ [4] https://patchwork.kernel.org/project/dri-devel/patch/20200911135413.3654800-11-m.tretter@pengutronix.de/#23995147 -- linux-phy mailing list linux-phy@lists.infradead.org https://lists.infradead.org/mailman/listinfo/linux-phy