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[188.155.177.222]) by smtp.gmail.com with ESMTPSA id hz14sm2415400ejc.107.2021.06.25.02.21.35 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 25 Jun 2021 02:21:35 -0700 (PDT) From: Krzysztof Kozlowski Subject: Re: [RFC PATCH 2/9] drm: bridge: Add Samsung SEC MIPI DSIM bridge driver To: Laurent Pinchart Cc: Jagan Teki , Fabio Estevam , Michael Tretter , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , Peng Fan , Francis Laniel , Matteo Lisi , Neil Armstrong , linux-amarula , 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 References: <20210621072424.111733-1-jagan@amarulasolutions.com> <20210621072424.111733-3-jagan@amarulasolutions.com> Message-ID: Date: Fri, 25 Jun 2021 11:21:34 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 24 Jun 2021 at 14:19, Laurent Pinchart wrote: > > Hi Jagan, > > On Thu, Jun 24, 2021 at 05:42:43PM +0530, Jagan Teki wrote: > > On Thu, Jun 24, 2021 at 8:18 AM Fabio Estevam wrote: > > > 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://patchwork.kernel.org/project/dri-devel/cover/20200911135413.3654800-1-m.tretter@pengutronix.de/ > > > > Thanks for the reference, I will check it out and see I can send any > > updated versions wrt my i.MX8MM platform. > > Thanks. > > I had a brief look at the exynos driver, and I think it should be turned > into a DRM bridge as part of this rework to be used with the i.MX8MM. > > Is there someone from Samsung who could assist, at least to test the > changes ? Yes, I mentioned few guys in reply to PHY. Around the DRM drivers you can get in touch with: Inki Dae Seung-Woo Kim Marek Szyprowski Andrzej Hajda The easiest testing of the display stack would be on Hardkernel's Odroid XU4 (https://www.hardkernel.com/shop/odroid-xu4-special-price/) however you will not test the DSI/DSIM directly (it has only HDMI port). Best regards, Krzysztof Best regards, Krzysztof