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Message-ID: <CAGJbQdeBsjQbWVjonPWH55+JKqfg9pnamcXH=uNecJ=Er73BHw@mail.gmail.com>
Date: Tue, 18 Mar 2025 11:22:35 +0000
From: nelakurthi koteswararao <koteswararao18@...il.com>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
Andrzej Hajda <andrzej.hajda@...el.com>, Neil Armstrong <neil.armstrong@...aro.org>,
Robert Foss <rfoss@...nel.org>, Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>,
Douglas Anderson <dianders@...omium.org>
Cc: Herve Codina <herve.codina@...tlin.com>, dri-devel@...ts.freedesktop.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Maxime Ripard <mripard@...nel.org>,
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Subject: Fwd: Failure in triggering jd9365da MIPI DSI Display drm_panel
functions prepare/enable()
Hi,
Requesting to please go through below mail that deals with MIPI DSI display
panel bringup activity.
Jd9365da is a MIPI dsi panel is connected to nxp based imx8mm core board
directly without any bridge and it’s connected through MIPI DSIM (SAMSUNG)
(linux-6.6/drivers/gpu/drm/Bridge/Samsung-dsim.c) software interface.
Prepared Scarthgap yocto BSP images for imx8mm core based NXP board
running with linux-6.6 kernel version and booted the board.
The below log in boot sequence confirm panel is attached with dsim host
controller.
{{
[ 2.568380] samsung-dsim 32e10000.dsi: [drm:samsung_dsim_host_attach]
Attached display-8hd-a device // printed from samsung_dsim_host_attach()
in drivers/gpu/drm/bridge/samsung-dsim.c
}}
But The issue I am facing currently is DRM pipeline is failing to trigger
struct drm_bridge_funcs attach() definition i.e Samsung_dsim_attach() that
in turn invokes drm_bridge_attach() and it helps in triggering Jd9365da
drm_panel specific prepare/enable functions subsequently.
I attached a debug log added to Samsung-dsim.c file along with a jd9365da
panel file (with debug logs) and boot log for reference. I attached
jd9365da dts file too for reference
I request to please go through attached files and boot logs and please
provide input for further debugging.
I attached an arch/arm64/boot/dts/freescale/imx8mm.dtsi file (that contains
mipi-dsi entries for Samsung-dsim.c) .
Kind Regards
Kote
Content of type "text/html" skipped
View attachment "samsung-dsim-jd9365da-bootlog.txt" of type "text/plain" (27100 bytes)
Download attachment "imx8mm-jd9365da-mipi-dsi.dts" of type "application/octet-stream" (2562 bytes)
View attachment "panel-jadard-jd9365da-h3.c" of type "text/x-c-code" (25673 bytes)
Download attachment "imx8mm.dtsi" of type "application/octet-stream" (47573 bytes)
View attachment "samsung-dsim.c" of type "text/x-c-code" (59045 bytes)
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