| Message ID | 20241215083805.1461902-1-amadeus@jmu.edu.cn (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/1] arm64: dts: rockchip: default to host mode for USB on Radxa E25 | expand |
Hi Chukun, Could you check Product Brief P.4? https://dl.radxa.com/cm3i/e25/radxa_e25_product_brief.pdf There is "USB3.0 OTG Switch". Best regards, -- FUKAUMI Naoki Radxa Computer (Shenzhen) Co., Ltd. On 12/15/24 17:38, Chukun Pan wrote: > The Radxa E25 board has only one USB3.0 Type A connector, > changing it to host mode is more appropriate. > > Cc: FUKAUMI Naoki <naoki@radxa.com> > Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn> > --- > arch/arm64/boot/dts/rockchip/rk3568-radxa-e25.dts | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm64/boot/dts/rockchip/rk3568-radxa-e25.dts b/arch/arm64/boot/dts/rockchip/rk3568-radxa-e25.dts > index 98cfa3abb809..90a3cb54fd47 100644 > --- a/arch/arm64/boot/dts/rockchip/rk3568-radxa-e25.dts > +++ b/arch/arm64/boot/dts/rockchip/rk3568-radxa-e25.dts > @@ -218,6 +218,7 @@ &usb_host0_ohci { > }; > > &usb_host0_xhci { > + dr_mode = "host"; > status = "okay"; > }; >
Hi, > Could you check Product Brief P.4? > > https://dl.radxa.com/cm3i/e25/radxa_e25_product_brief.pdf > > There is "USB3.0 OTG Switch". > > Best regards, Oh, sorry, it was covered by the shell so I didn't notice it. BTW do you see any issues in the sd-uhs-sdr104 mode? Thanks, Chukun
Hi Chukun, On 12/22/24 13:30, Chukun Pan wrote: > Hi, >> Could you check Product Brief P.4? >> >> https://dl.radxa.com/cm3i/e25/radxa_e25_product_brief.pdf >> >> There is "USB3.0 OTG Switch". >> >> Best regards, > > Oh, sorry, it was covered by the shell so I didn't notice it. > BTW do you see any issues in the sd-uhs-sdr104 mode? I've been using the uSD card for a long time as a bootloader only, so I don't know what the problem is. Do you have any information on how to reproduce the problem? Best regards, -- FUKAUMI Naoki Radxa Computer (Shenzhen) Co., Ltd. > Thanks, > Chukun >
Hi, > I've been using the uSD card for a long time as a bootloader only, > so I don't know what the problem is. > > Do you have any information on how to reproduce the problem? > > Best regards, Not stable on openwrt/lede, sometimes falling to sd-highspeed. Maybe it would be better to switch to sd-uhs-sdr50 mode. Thanks, Chukun
On 2024-12-23 04:00, Chukun Pan wrote: > Hi, >> I've been using the uSD card for a long time as a bootloader only, >> so I don't know what the problem is. >> >> Do you have any information on how to reproduce the problem? >> >> Best regards, > > Not stable on openwrt/lede, sometimes falling to sd-highspeed. > Maybe it would be better to switch to sd-uhs-sdr50 mode. I would advise against using any sd-uhs- mode for sd-card on Rockchip RK356x boards because of a timing issue during boot between mmc, regulator and IO-domain drivers. Any board that support changing between 1v8 or 3v3 io-voltage for the sd-card is possible affected. There is a race condition during boot and when IO-domain driver has not been probed before UHS tuning is started the tuning is done using a 3v3 IO-domain configuration instead of 1v8. This can typically be seen by comparing UHS tuning during boot and when same sd-card is removed and re-inserted after boot. Ideally this race condition should be solved instead of limiting use of UHS modes. However, use of sd-uhs-sdr50 is typically more forgiving and has been used on other boards. Regards, Jonas > > Thanks, > Chukun >
Hi, > I would advise against using any sd-uhs- mode for sd-card on Rockchip > RK356x boards because of a timing issue during boot between mmc, > regulator and IO-domain drivers. This problem seems to occur only on rk356x? > Ideally this race condition should be solved instead of limiting use > of UHS modes. However, use of sd-uhs-sdr50 is typically more forgiving > and has been used on other boards. It seems that sd-uhs-sdr50 does not need 1.8V IO voltage. I tested the speed on a rk3528 board with sdio wifi: (The IO voltage of sdio on this board is 3.3V) highspeed: 170Mbps DL sdr50: 290Mbps DL sdr104: 290Mbps DL So sdr50 should be safe. Thanks, Chukun
diff --git a/arch/arm64/boot/dts/rockchip/rk3568-radxa-e25.dts b/arch/arm64/boot/dts/rockchip/rk3568-radxa-e25.dts index 98cfa3abb809..90a3cb54fd47 100644 --- a/arch/arm64/boot/dts/rockchip/rk3568-radxa-e25.dts +++ b/arch/arm64/boot/dts/rockchip/rk3568-radxa-e25.dts @@ -218,6 +218,7 @@ &usb_host0_ohci { }; &usb_host0_xhci { + dr_mode = "host"; status = "okay"; };
The Radxa E25 board has only one USB3.0 Type A connector, changing it to host mode is more appropriate. Cc: FUKAUMI Naoki <naoki@radxa.com> Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn> --- arch/arm64/boot/dts/rockchip/rk3568-radxa-e25.dts | 1 + 1 file changed, 1 insertion(+)