From: Francesco Dolcini <francesco@dolcini.it>
To: Leonardo Costa <leoreis.costa@gmail.com>
Cc: andrzej.hajda@intel.com, neil.armstrong@linaro.org,
rfoss@kernel.org, Laurent.pinchart@ideasonboard.com,
jonas@kwiboo.se, jernej.skrabec@gmail.com,
luca.ceresoli@bootlin.com, maarten.lankhorst@linux.intel.com,
mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com,
simona@ffwll.ch, dri-devel@lists.freedesktop.org,
linux-kernel@vger.kernel.org, tomi.valkeinen@ideasonboard.com,
francesco@dolcini.it, leonardo.costa@toradex.com,
stable@vger.kernel.org
Subject: Re: [PATCH RESEND] drm/bridge: tc358768: Enforce input bus flags via atomic_check
Date: Mon, 7 Sep 2026 11:17:15 +0200 [thread overview]
Message-ID: <20260907091715.GA48864@francesco-nb> (raw)
In-Reply-To: <20260706132440.1594239-1-leoreis.costa@gmail.com>
Hello DRM bridge maintainers,
On Mon, Jul 06, 2026 at 10:24:17AM -0300, Leonardo Costa wrote:
> From: Leonardo Costa <leonardo.costa@toradex.com>
>
> The tc358768 declares static bridge timings requiring pixel data to be
> sampled on the positive clock edge.
>
> However, the DRM core default propagation simply copies the output-side
> bus flags, coming from the next bridge, connector or panel, to the
> input side. If the propagated flags are incompatible with the bridge
> ones, the data is wrongly sampled, typically resulting in visual
> artifacts on the panel.
>
> Implement the atomic_check hook, replacing the mutually exclusive
> mode_fixup, and set the bridge state input bus flags to the ones
> required by the tc358768. The sync polarity defaulting previously done
> in mode_fixup is carried over into atomic_check unchanged.
>
> Fixes: ff1ca6397b1d ("drm/bridge: Add tc358768 driver")
> Cc: stable@vger.kernel.org
> Signed-off-by: Leonardo Costa <leonardo.costa@toradex.com>
Just a gentle ping, can this fix be merged?
Francesco
next prev parent reply other threads:[~2026-09-07 9:17 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-06 13:24 [PATCH RESEND] drm/bridge: tc358768: Enforce input bus flags via atomic_check Leonardo Costa
2026-07-07 6:50 ` Francesco Dolcini
2026-07-09 10:28 ` Swamil Jain
2026-09-07 9:17 ` Francesco Dolcini [this message]
2026-09-09 8:57 ` Luca Ceresoli
2026-09-09 9:15 ` Luca Ceresoli
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