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b=QJx4pD3h5WMfaRo9W0EvTF6goY BapWrz5179rvyOrHL6dOengJgj79GvD7dKfyewvov+Nugo+OfX96ypdaC3dlJTBXc+fIntYohkNaQ yqV/99qP3sCHq4vcZKBQ2bzgfS+dcQ0cKhD4RQb9qDIAOqhvvJWwEYmxQVBxzaNbHnMk=; Received: from [79.45.60.29] (port=62784 helo=bywater) by esm19.siteground.biz with essmtpa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.100.1) (envelope-from ) id 1xABeI-00000000BOp-0kv1; Fri, 25 Sep 2026 19:31:58 +0000 Date: Fri, 25 Sep 2026 21:31:56 +0200 From: Francesco Valla To: =?utf-8?B?TcOgeGlt?= Pedraza Padilla Cc: Thomas Zimmermann , Helge Deller , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Maxime Ripard , linux-fbdev@vger.kernel.org, devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 0/7] Boot logo supplied by the device tree Message-ID: References: <20260923201035.51007-1-maximpedraza@gmail.com> <64e273d4-2660-437d-8871-e2bfa3c377c9@suse.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; 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arc=none Hi Màxim, On Fri, Sep 25, 2026 at 10:48:31AM +0200, Màxim Pedraza Padilla wrote: > Hi Thomas, > > > the whole Linux logo on the console is somewhat gimmicky and IMHO should > > not be further extended. Also fbdev as a whole has realistically run its > > course. We fix bugs and occasionally clean up the code, but it is > > questionable whether new feature make much sense. Even more so as the > > drivers your system uses appear to be DRM ones. > > They are, it is tilcdc. Understood, I will drop the fbdev side, which > also settles your comment on patch 1. > > > There is a proposal for a DRM splash screen at [1]. It retrieves the > > device vendor's logo from the firmware and displays it at the given > > coordinates. IMHO you should start with this series and add DT support > > there. > > Agreed. I have been following Francesco's series since Sam pointed me > at it, and it is where the DRM follow-up I mentioned in the cover letter > belongs, rather than in a client of my own. > > A device tree source fits next to the BGRT one. The BGRT is the firmware > handing the kernel an image and where to put it, and a DT system has no > such table. The BMP loaded as firmware only helps if the file is built > into the kernel, or if a filesystem is already there when the display > comes up. With U-Boot's Falcon mode, the device tree is the only thing > that reaches the kernel. > > So the plan would be a node under /chosen carrying a BMP, either in the > node itself or in a reserved memory region the bootloader loaded it > into, with the placement properties from this series. The region is the > same memremap() the BGRT source already does, only with the address > coming from the device tree. > > Rotation too: the client skips a BGRT image with the orientation bits > set today, and it could turn it instead. I will ask Rob separately how > he wants the image described, since that is what the binding hinges on. > > Francesco, is a v4 on the way? Would you take a DT source as patches on > top of your series, or would you rather I wait until it lands? > v4 is planned but has been preempted by other activities - I am not able to give you an ETA at the moment. If you have capacity, feel free to take over. > Max > Regards, Francesco