On 1/13/26 7:41 AM, Joseph Guo wrote:
On 1/13/2026 7:47 AM, Marek Vasut wrote:
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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.
Hi Marek,
I don't have 4 lanes waveshare panel on my hands. Have you tested with the
4-lane panel already?
Yes, the 13.3" DSI panel is 4-lane
https://www.waveshare.com/13.3inch-dsi-lcd.htm , I have it connected to
Retronix Sparrow Hawk board which has 4-lane port.
See also this patch I submitted, that is the DT binding for it:
[PATCH 2/2] arm64: dts: renesas: sparrow-hawk: Add overlay for WaveShare
Display 13.3"
