From: Marek Vasut <marek.vasut@mailbox.org>
To: dri-devel@lists.freedesktop.org
Cc: Joseph Guo <qijian.guo@nxp.com>,
Andrzej Hajda <andrzej.hajda@intel.com>,
Conor Dooley <conor+dt@kernel.org>,
David Airlie <airlied@gmail.com>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
Jonas Karlman <jonas@kwiboo.se>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Neil Armstrong <neil.armstrong@linaro.org>,
Rob Herring <robh@kernel.org>, Robert Foss <rfoss@kernel.org>,
Simona Vetter <simona@ffwll.ch>,
Thomas Zimmermann <tzimmermann@suse.de>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-renesas-soc@vger.kernel.org,
Luca Ceresoli <luca.ceresoli@bootlin.com>
Subject: Re: [PATCH v2 2/2] drm/bridge: waveshare-dsi: Add support for 1..4 DSI data lanes
Date: Mon, 2 Mar 2026 22:35:31 +0100 [thread overview]
Message-ID: <fe436c72-deae-41af-87ea-726fe4801e7b@mailbox.org> (raw)
In-Reply-To: <3af09657-78ce-4bc6-b8d5-b346a3b86c5b@mailbox.org>
On 2/6/26 12:48 PM, Marek Vasut wrote:
> On 1/15/26 3:39 AM, Marek Vasut wrote:
>> Parse the data lane count out of DT. Limit the supported data lanes
>> to 1..4 which is the maximum available DSI pairs on the connector of
>> any known panels which may use this bridge. Internally, this bridge
>> is an ChipOne ICN6211 which loads its register configuration from a
>> dedicated storage and its I2C does not seem to be accessible. The
>> ICN6211 also supports up to 4 DSI lanes, so this is a hard limit.
>>
>> To avoid any breakage on old DTs where the parsing of data lanes from
>> DT may fail, fall back to the original hard-coded value of 2 lanes and
>> warn user.
>>
>> The lane configuration is preconfigured in the bridge for each of the
>> WaveShare panels. The 13.3" DSI panel works with 4-lane configuration,
>> others seem to use 2-lane configuration. This is a hardware property,
>> so the actual count should come from DT.
>>
>> Reviewed-by: Joseph Guo <qijian.guo@nxp.com>
>> Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
>
> Is it OK to apply these two patches now ?
Can this be applied now ?
next prev parent reply other threads:[~2026-03-02 21:35 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-15 2:39 [PATCH v2 1/2] dt-bindings: display: bridge: waveshare,dsi2dpi: Document 1..4 DSI lane support Marek Vasut
2026-01-15 2:39 ` [PATCH v2 2/2] drm/bridge: waveshare-dsi: Add support for 1..4 DSI data lanes Marek Vasut
2026-02-06 11:48 ` Marek Vasut
2026-03-02 21:35 ` Marek Vasut [this message]
2026-03-03 7:56 ` Maxime Ripard
2026-03-03 12:59 ` Marek Vasut
2026-03-03 13:32 ` Luca Ceresoli
2026-03-03 14:15 ` Marek Vasut
2026-03-03 13:24 ` Luca Ceresoli
2026-01-15 20:01 ` [PATCH v2 1/2] dt-bindings: display: bridge: waveshare,dsi2dpi: Document 1..4 DSI lane support Rob Herring (Arm)
2026-03-03 13:42 ` Luca Ceresoli
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