linux-kernel - [PATCH v3 0/5] mxsfb/nwl/panels: media bus format fixes

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Date:   Mon, 11 Oct 2021 15:41:22 +0200
From:   Guido Günther <agx@...xcpu.org>
To:     Andrzej Hajda <a.hajda@...sung.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Robert Foss <robert.foss@...aro.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, Marek Vasut <marex@...x.de>,
        Stefan Agner <stefan@...er.ch>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        Ondrej Jirman <megous@...ous.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v3 0/5] mxsfb/nwl/panels: media bus format fixes

commit b776b0f00f24 ("drm: mxsfb: Use bus_format from the nearest bridge if
present") added bus format probing to mxsfb this exposed several issues in the
display stack as used on the Librem 5:

The nwl bridge and the panels didn't bother to set any media bus formats and in
that case mxsfb would not pick a reasonable default. This series aims to fix
this.

This series includes the patch from
https://lore.kernel.org/dri-devel/YVLYh%2FSgBritG%2FRJ@qwark.sigxcpu.org/
with a `dev_warn` added.

The patches are against 5.15-rc3. I've marked a single patch with a 'fixes'
which is enough to unbreak the display stack in 5.15.

All patches of this series can be applied independently.

Changes from v1:
- Review comment by Marek Vasut
  https://lore.kernel.org/dri-devel/67e6056a-6157-795d-908d-d65cc803c03d@denx.de/
  Improve warning message
- Move mxsfb patches to the end of the queue and the actual nwl fix to the
  front.

Changes from v2:
- Review comments by Lucas Stach
  https://lore.kernel.org/dri-devel/cover.1633332399.git.agx@sigxcpu.org/T/#m961c22bf2a437a16b29214913d6f0d523fbe88e2
  Drop fixes tag from mxsfb driver and tweak commit message
- Add Reviewed-by from Lucas
  https://lore.kernel.org/dri-devel/cover.1633332399.git.agx@sigxcpu.org/T/#m9f3337a673ae1adbb1f0152a48270b0e1104b0c1
  https://lore.kernel.org/dri-devel/cover.1633332399.git.agx@sigxcpu.org/T/#m5706d5b93cb6879b6bb4a1810b88800fe4180f74
  https://lore.kernel.org/dri-devel/cover.1633332399.git.agx@sigxcpu.org/T/#m961c22bf2a437a16b29214913d6f0d523fbe88e2
- Add Reviewd-by from Rober Foss
  https://lore.kernel.org/dri-devel/CAG3jFyteqcPNZqrFsggCrnpDfsGGQvibfHBezW+1Hcf3-z91QQ@mail.gmail.com/



Guido Günther (5):
  drm/bridge: nwl-dsi: Add atomic_get_input_bus_fmts
  drm/panel: mantix: Add media bus format
  drm/panel: st7703: Add media bus format
  drm: mxsfb: Print failed bus format in hex
  drm: mxsfb: Set fallback bus format when the bridge doesn't provide
    one

 drivers/gpu/drm/bridge/nwl-dsi.c              | 35 +++++++++++++++++++
 drivers/gpu/drm/mxsfb/mxsfb_kms.c             |  8 ++++-
 .../gpu/drm/panel/panel-mantix-mlaf057we51.c  |  9 +++++
 drivers/gpu/drm/panel/panel-sitronix-st7703.c |  8 +++++
 4 files changed, 59 insertions(+), 1 deletion(-)

-- 
2.33.0