linux-kernel - Re: [PATCH 07/10] drm/tidss: Fix dss reset

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Message-ID: <ZUO4DeEjWbLuBmRq@francesco-nb.int.toradex.com>
Date:   Thu, 2 Nov 2023 15:54:05 +0100
From:   Francesco Dolcini <francesco@...cini.it>
To:     Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Cc:     Aradhya Bhatia <a-bhatia1@...com>,
        Devarsh Thakkar <devarsht@...com>,
        Jyri Sarha <jyri.sarha@....fi>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: Re: [PATCH 07/10] drm/tidss: Fix dss reset

On Wed, Nov 01, 2023 at 11:17:44AM +0200, Tomi Valkeinen wrote:
> The probe function calls dispc_softreset() before runtime PM is enabled
> and without enabling any of the DSS clocks. This happens to work by
> luck, and we need to make sure the DSS HW is active and the fclk is
> enabled.

Not sure on the exact implication here, however from the description
this seems a candidate for stable and would need a Fixes tag.

Francesco