On 1/13/2026 4:04 PM, Marek Vasut wrote: > [You don't often get email from [email protected]. Learn why this is > important at https://aka.ms/LearnAboutSenderIdentification ] > > Caution: This is an external email. Please take care when clicking links or > opening attachments. When in doubt, report the message using the 'Report this > email' button > > > On 1/13/26 7:41 AM, Joseph Guo wrote: >> On 1/13/2026 7:47 AM, Marek Vasut wrote: >>> [You don't often get email from [email protected]. Learn why >>> this is important at https://aka.ms/LearnAboutSenderIdentification ] >>> >>> Caution: This is an external email. Please take care when clicking links or >>> opening attachments. When in doubt, report the message using the 'Report >>> this email' button >>> >>> >>> 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"
OK, thank you. Reviewed-by: Joseph Guo <[email protected]> Regards, Joseph
