linux-kernel - Re: [PATCH v4 2/3] drm/tidss: Power up attached PM domains on probe

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Message-ID: <5fa04376-180a-4f7a-8718-42510de45d5d@ideasonboard.com>
Date: Fri, 16 Jan 2026 12:04:11 +0200
From: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To: Swamil Jain <s-jain1@...com>
Cc: dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, devarsht@...com, praneeth@...com,
 u-kumar1@...com, jyri.sarha@....fi, airlied@...il.com, simona@...ll.ch,
 maarten.lankhorst@...ux.intel.com, mripard@...nel.org, tzimmermann@...e.de,
 robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
 aradhya.bhatia@...ux.dev, mwalle@...nel.org
Subject: Re: [PATCH v4 2/3] drm/tidss: Power up attached PM domains on probe

Hi,

On 16/01/2026 11:54, Swamil Jain wrote:
> From: Devarsh Thakkar <devarsht@...com>
> 
> Some SoC's such as AM62P have dedicated power domains
> for OLDI which need to be powered on separately along
> with display controller.
> 
> So during driver probe, power up all attached PM domains
> enumerated in devicetree node for DSS.
> 
> This also prepares base to add display support for AM62P.
> 
> Tested-by: Michael Walle <mwalle@...nel.org>
> Signed-off-by: Devarsh Thakkar <devarsht@...com>
> [j-choudhary@...com: fix PM call sequence causing kernel crash in OLDI]
> Signed-off-by: Jayesh Choudhary <j-choudhary@...com>
> Signed-off-by: Swamil Jain <s-jain1@...com>
> ---
>  drivers/gpu/drm/tidss/tidss_drv.c | 82 +++++++++++++++++++++++++++++--
>  drivers/gpu/drm/tidss/tidss_drv.h |  4 ++
>  2 files changed, 82 insertions(+), 4 deletions(-)
> 

Reviewed-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>

 Tomi