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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