From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6E96D606A322 for ; Sat, 24 Oct 2026 09:54:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=dolcini.it header.i=@dolcini.it header.a=rsa-sha256 header.s=default header.b=AJgcN3Qn Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A3E6010E702; Sat, 24 Oct 2026 09:54:19 +0000 (UTC) Received: from mail11.truemail.it (mail11.truemail.it [217.194.8.81]) by gabe.freedesktop.org (Postfix) with ESMTPS id 298CD10E702 for ; Sat, 24 Oct 2026 09:54:12 +0000 (UTC) Received: from francesco-nb (93-49-2-63.ip317.fastwebnet.it [93.49.2.63]) by mail11.truemail.it (Postfix) with ESMTPA id 4015A1FA9B; Sat, 24 Oct 2026 11:54:09 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dolcini.it; s=default; t=1792835650; bh=wd5WneJ3yT2t5uYaf+vnpFTb/wh6DgL3x1P6eVcBx78=; h=From:To:Subject; b=AJgcN3QnNjtN+OdFQ2zyIUxTxNLFrO6u09lpcfcgnB5VJvCklXGv6zbM6eQK8pBYk EEfPLvb1/rcpYR4UkWbGpbhORgSQQgO2M10dJjANSjacJj4qM7ywDgztGQVbE8RLBu me2C2CicBux3wlq357TDdbxH/iczARZ7u2mGi8IBPJTj3eEeMZ0ZQlqwofbtWTxekT cp8FPwq/pS6BICUajhxa6Koh98I5BAQV2ai27145IQfd1BXnrlPh8G/JnVQAH3hf6S sjGMla4AZKSVgyPldzvX2xJc4e0Tq7WtmNH1v2pr7OAF2wGQ7JpZfMcP0g4cvcV1lx eA3xDXkU7icSA== Date: Sat, 24 Oct 2026 11:54:05 +0200 From: Francesco Dolcini To: Luca Ceresoli , Ernest Van Hoecke Cc: tessolveupstream@gmail.com, andrzej.hajda@intel.com, neil.armstrong@linaro.org, rfoss@kernel.org, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, marex@denx.de, valentin@compulab.co.il, philippe.schenker@toradex.com, alexander.stein@ew.tq-group.com, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 1/1] drm: bridge: ti-sn65dsi83: Fix DSI mode flags for stable LVDS output Message-ID: <20261024095405.GA5692@francesco-nb> References: <7056b23b-ed81-4d79-b782-5cfcb0102ef7@gmail.com> <60a24977-b181-40e4-bcf6-38b65af293e2@gmail.com> <1716be56-ac43-440b-a5df-58cbf571ba95@gmail.com> <3hfae2i2i2toxbo7hg2if6pztaswgnfj65xfm2c4ofljc6jhua@slaqoewn4mxq> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "dri-devel" X-Spam-Status: No, score=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 Hello Luca, Ernest, On Wed, Sep 09, 2026 at 03:30:53PM +0200, Luca Ceresoli wrote: > On Fri Sep 4, 2026 at 2:02 PM CEST, Ernest Van Hoecke wrote: > >> > Also, from our testing, when using: > >> > > >> > dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | > >> > MIPI_DSI_MODE_VIDEO_NO_HSA | MIPI_DSI_MODE_NO_EOT_PACKET; > >> > > >> > we are not able to get display output. > >> > >> This is the case for the panel I worked on as well. In the practice we both > >> observe that non-burst mode is what fixes the panel, but there is no clear > >> explanation of the reason in the docs (that's what I hope to discover from > >> TI). > >> > > I am testing a DSI panel on our Verdin iMX8MP module, and noticed that > > this caused a regression. [...] > > I think we'll need to either revert this and later apply both together > > when ready, or apply the second patch now as well. Right now, it broke > > the DSI panel behind a TI sn65dsi83 bridge on v7.3-rc1. > > Reverting is surely the last resort. If you can answer the above questions > it would be good, maybe we find out reverting is not necessary, and worst > case we'll revert with better understanding on what went wrong, and maybe > come up with a new fix that doesn't regress. What's the status of this regression? Francesco