linux-kernel - [PATCH v2 0/4] drm/panel: jh057n00900: Move dsi init sequence to prepare

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Message-Id: <cover.1564146727.git.agx@sigxcpu.org>
Date:   Fri, 26 Jul 2019 15:14:35 +0200
From:   Guido Günther <agx@...xcpu.org>
To:     Guido Günther <agx@...xcpu.org>,
        Purism Kernel Team <kernel@...i.sm>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/4] drm/panel: jh057n00900: Move dsi init sequence to prepare

If the panel is wrapped in a panel_bridge it gets prepar()ed before the
upstream DSI bridge which can cause hangs (e.g. with imx-nwl since clocks
are not enabled yet). To avoid this move the panel's first DSI access to
enable() so the upstream bridge can prepare the DSI host controller in
it's pre_enable().

The second patch makes the disable() call symmetric to the above and the third
one just eases debugging.

Changes from v1:
* As per review comments by Sam Ravnborg
  * Ignore failures to disable the backlight in jh057n_disable()
  * Add 'drm/panel: jh057n00900: Use drm_panel_{unprepare,disable} consistently'
* Collected Reviewed-By: Thanks Sam!

To: "Guido Günther" <agx@...xcpu.org>,Purism Kernel Team <kernel@...i.sm>,Thierry Reding <thierry.reding@...il.com>,Sam Ravnborg <sam@...nborg.org>,David Airlie <airlied@...ux.ie>,Daniel Vetter <daniel@...ll.ch>,dri-devel@...ts.freedesktop.org,linux-kernel@...r.kernel.org

Guido Günther (4):
  drm/panel: jh057n00900: Move panel DSI init to enable()
  drm/panel: jh057n00900: Move mipi_dsi_dcs_set_display_off to disable()
  drm/panel: jh057n00900: Print error code on all DRM_DEV_ERROR()s
  drm/panel: jh057n00900: Use drm_panel_{unprepare,disable} consistently

 .../drm/panel/panel-rocktech-jh057n00900.c    | 31 ++++++++++---------
 1 file changed, 17 insertions(+), 14 deletions(-)

-- 
2.20.1