From: Rob Herring <robh@kernel.org>
To: Liu Ying <victor.liu@nxp.com>
Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, krzk+dt@kernel.org,
conor+dt@kernel.org, andrzej.hajda@intel.com,
neil.armstrong@linaro.org, rfoss@kernel.org,
Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se,
jernej.skrabec@gmail.com, maarten.lankhorst@linux.intel.com,
mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com,
simona@ffwll.ch
Subject: Re: [PATCH 3/5] dt-bindings: display: simple-bridge: Document DPI color encoder
Date: Tue, 4 Mar 2025 09:23:20 -0600 [thread overview]
Message-ID: <20250304152320.GA2630063-robh@kernel.org> (raw)
In-Reply-To: <20250304101530.969920-4-victor.liu@nxp.com>
On Tue, Mar 04, 2025 at 06:15:28PM +0800, Liu Ying wrote:
> A DPI color encoder, as a simple display bridge, converts input DPI color
> coding to output DPI color coding, like Adafruit Kippah DPI hat[1] which
> converts input 18-bit pixel data to 24-bit pixel data(with 2 low padding
> bits in every color component though). Document the DPI color encoder.
Why do we need a node for this? Isn't this just wired how it is wired
and there's nothing for s/w to see or do? I suppose if you are trying to
resolve the mode with 24-bit on one end and 18-bit on the other end, you
need to allow that and not require an exact match. You still might need
to figure out which pins the 18-bit data comes out on, but you have that
problem with an 18-bit panel too. IOW, how is this any different if you
have an 18-bit panel versus 24-bit panel?
Rob
next prev parent reply other threads:[~2025-03-04 15:23 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-04 10:15 [PATCH 0/5] drm/bridge: simple-bridge: Add DPI color encoder support Liu Ying
2025-03-04 10:15 ` [PATCH 1/5] dt-bindings: display: Document DPI color codings Liu Ying
2025-03-04 10:33 ` Maxime Ripard
2025-03-05 7:51 ` Krzysztof Kozlowski
2025-03-05 8:26 ` Maxime Ripard
2025-03-05 12:16 ` Krzysztof Kozlowski
2025-03-06 7:13 ` Liu Ying
2025-03-04 10:15 ` [PATCH 2/5] drm/of: Add drm_of_dpi_get_color_coding() Liu Ying
2025-03-04 10:15 ` [PATCH 3/5] dt-bindings: display: simple-bridge: Document DPI color encoder Liu Ying
2025-03-04 10:38 ` Maxime Ripard
2025-03-06 5:49 ` Liu Ying
2025-03-04 11:27 ` Rob Herring (Arm)
2025-03-04 15:23 ` Rob Herring [this message]
2025-03-05 9:35 ` Alexander Stein
2025-03-05 16:38 ` Rob Herring
2025-03-06 7:02 ` Liu Ying
2025-03-06 11:35 ` Maxime Ripard
2025-03-06 20:34 ` Rob Herring
2025-03-07 3:25 ` Liu Ying
2025-03-10 9:53 ` Maxime Ripard
2025-03-11 2:29 ` Liu Ying
2025-03-11 7:44 ` Maxime Ripard
2025-03-07 3:10 ` Liu Ying
2025-03-10 9:44 ` Maxime Ripard
2025-03-11 2:38 ` Liu Ying
2025-03-11 7:52 ` Maxime Ripard
2025-03-04 10:15 ` [PATCH 4/5] drm/bridge: simple-bridge: Add DPI color encoder support Liu Ying
2025-03-04 10:40 ` Maxime Ripard
2025-03-06 5:57 ` Liu Ying
2025-03-04 10:15 ` [PATCH 5/5] drm/bridge: simple-bridge: Add next panel support Liu Ying
2025-03-04 10:41 ` Maxime Ripard
2025-03-06 6:17 ` Liu Ying
2025-03-04 15:00 ` [PATCH 0/5] drm/bridge: simple-bridge: Add DPI color encoder support Alexander Stein
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