From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DAC745221D3; Tue, 29 Sep 2026 12:26:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790684814; cv=none; b=b9G/uI6Frarx6iJqeVPRCMN2NGsm3LW1DbsgeZZVQRSbw6apA7w3cVRQSrr/LzXeD/MeudleUb4iHfVOOpgK4gg6OnF7pnicsj7bFKPy7VG1jc5hJm3u1H9ABPt+agTJ2jtaMXOYNlO3mbyWySvfemGR/kXBndgUVSUQ8Qbbsjc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790684814; c=relaxed/simple; bh=gVrk7DmHB7+1kWaD6C04EGiR208uDAfS5PZTUfwikZE=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=pqwap1vd9InsxgAj45XjwMCGUqNqJhexkgjFXIJ0QjreGGFbxkiNjBNiqSrCv0qcEch3WfLlZzjhc0h0gJPbJtzJ/UUEPAZnTp2Y/DwHJeJNek6otHI/8nAge42K4NkupQsU7k/RVIexV6m139taHI1wGi7TfjiKzVS6yaszhdY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=K2+JzGGS; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="K2+JzGGS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CA9901F000FF; Tue, 29 Sep 2026 12:26:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790684812; bh=vEjOq9iIzZvQCynoy27IqczYh6PISPotB3jDpPEaOfw=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=K2+JzGGSHoGuEFCV74bT/2tS6jxFi6CvQfgf07M2HTs3TL+IByBGdVSIY9hY8Fi20 hRWyTO842GZEuJXmfndYObvmmGos7RlZT8khE7eWxY5RCAFqz84r7ziowY+2C8QJ3O vpDSaZRJ23FzA4Jp6a0qXX+wX/PGlNtoOQGqRsMXbgNerL+EtH/ZRsVgVfwaDPUHt5 zf30o3sgnRF3ine2o4DtU3MXl8UPq9JnI6p4PNuiR7sG6cQGp119XjsF5N38DeozVM j3oZI3ecYfHZ5WQHoTc6Sz+QJJ9oSuOmK+8OmwluT4BiwXmXf4sDpCZWvprwo4GAIY 2qpP20IVVVwuQ== Message-ID: Date: Tue, 29 Sep 2026 14:26:42 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 06/11] drm/panel: s6e3ha8: Correct the polarity logic within To: David Heidelberg , Neil Armstrong Cc: Dzmitry Sankouski , Jessica Zhang , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Konrad Dybcio , Abel Vesa , Petr Vorel , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, phone-devel@vger.kernel.org References: <20260924-crosshatch-panel-v2-0-08d5c7bf72fc@ixit.cz> <20260924-crosshatch-panel-v2-6-08d5c7bf72fc@ixit.cz> <20260929-dramatic-ocelot-of-support-2aa377@quoll> <739ce9f4-8bdb-4bc4-9cc1-9a1a7eba80ce@ixit.cz> <49805bcc-2456-4f7d-a08a-3ccb7223ea50@ixit.cz> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 29/09/2026 14:12, David Heidelberg wrote: >>>> >>>> OK, I went way too fast, that's correct part. But splitting fix is still >>>> just confusing. Backporting to stable is a different thing than fixing >>>> issues. >>> >>> Sure, I already droped the previous commit changing it for stable. >>> >>> Btw. looking at gpiod_toggle_active_low(), would it make sense to do a series >>> correcting panel reset logic? I see many panels keep "reset asserted" in the >>> driver (but ofc not in the reality). >> >> >> To my knowledge it is impossible task to do, without breaking something. > > I would do the partial change (only driver, not full DT). > > So we end up with drivers having the correct logic with extra 2-line DT quirk > using gpiod_toggle_active_low() for given compatible. > > This could solve people implementing new panel on top of existing DDIC and allow > them to use the right polarity for new compatible. New compatibles you can change to the proper polarity - I do not object this at all. I am referencing only existing DTS and existing bindings, which you cannot change without having some sort of impact. Best regards, Krzysztof