linux-kernel - Re: [PATCH 0/5] drm/panel: mantix-mlaf057we51: Power sequence improvements

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Message-Id: <176829516449.3839584.873916749545237546.b4-ty@linaro.org>
Date: Tue, 13 Jan 2026 10:06:04 +0100
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Guido Günther <agx@...xcpu.org>, 
 Purism Kernel Team <kernel@...i.sm>, Jessica Zhang <jesszhan0024@...il.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Sebastian Krzyszkowiak <sebastian.krzyszkowiak@...i.sm>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/5] drm/panel: mantix-mlaf057we51: Power sequence
 improvements

Hi,

On Mon, 05 Jan 2026 21:24:39 +0100, Sebastian Krzyszkowiak wrote:
> These are the patches that fix the issues with low contrast, "halo",
> temporary burn-in and occasional black screen on the Librem 5 phones,
> which use Mantix MLAF057WE51-X and Yashi Changhua YS57PSS36BH5GQ panels.
> 
> They're mostly about improving the power sequences to match the ones
> described in FT8006P datasheet, so the driver does not end up disturbing
> the internal initialization process performed by the controller.
> Aside of that, using LP mode has been found to improve the reliability of
> sending DSI commands to the panel to the point where long chains
> of commands can be sent without erroring out - something that, at least
> on i.MX8MQ, wasn't possible without LPM.
> 
> [...]

Thanks, Applied to https://gitlab.freedesktop.org/drm/misc/kernel.git (drm-misc-next)

[1/5] drm/panel: mantix: Enable DSI LPM
      https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/ef789ce4980b2bf9d61c53207f2b0aa1d32d9da8
[2/5] drm/panel: mantix: Improve power on sequence timings
      https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/dca84cc795df7f0cf790fbc2afcde53e6abd403a
[3/5] drm/panel: mantix: Improve power off sequence
      https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/61f028c13c42495964afb61974ec60c22230d81b
[4/5] drm/panel: mantix: Drop bank 9 initialization
      https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/c8b59651ebe678da004b71e8c20f79ed6881ea8d
[5/5] drm/panel: mantix: Don't turn on MIPI peripheral
      https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/8096e71bc875485dd34aa8bf5af15ab3c443cb54

-- 
Neil