linux-kernel - Fwd: Failure in triggering jd9365da MIPI DSI Display drm

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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)