linux-kernel - Re: [PATCH v2 3/5] drm/sysfb: simpledrm: Add support for interconnect paths

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Message-ID: <ypjcqiyfzjobg4zsm5sowjtu6ctvzgd4bvt3wpbqbb7o7f3rcm@q454aob3wwth>
Date: Sun, 6 Jul 2025 14:14:12 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Luca Weiss <luca.weiss@...rphone.com>
Cc: Hans de Goede <hdegoede@...hat.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Javier Martinez Canillas <javierm@...hat.com>,
        Helge Deller <deller@....de>, linux-fbdev@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/5] drm/sysfb: simpledrm: Add support for
 interconnect paths

On Mon, Jun 23, 2025 at 08:44:47AM +0200, Luca Weiss wrote:
> Some devices might require keeping an interconnect path alive so that
> the framebuffer continues working. Add support for that by setting the
> bandwidth requirements appropriately for all provided interconnect
> paths.
> 
> Reviewed-by: Thomas Zimmermann <tzimmermann@...e.de>
> Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
> ---
>  drivers/gpu/drm/sysfb/simpledrm.c | 83 +++++++++++++++++++++++++++++++++++++++
>  1 file changed, 83 insertions(+)

If simpledrm is being replaced by a proper DRM driver (thus removing
those extra votes), will it prevent ICC device from reaching the sync
state?

-- 
With best wishes
Dmitry