Ouya fails to detect the eMMC module when booted via certain bootloaders. Fastboot and hard-kexec bootloaders fail while u-boot does not. It was discovered that the issue manifests if the sdmmc4 alternate configuration clock pin is input disabled.
Ouya uses sdmmc4 in the primary pin configuration. It is unknown why this occurs, though it is likely related to other eMMC limitations experienced on Ouya.
For now, fix it by enabling input on cam_mclk_pcc0.
Cc: stable@vger.kernel.org # 5.10+ Fixes: d7195ac5c9c5 ("ARM: tegra: Add device-tree for Ouya") Reported-by: Matt Merhar mattmerhar@protonmail.com Tested-by: Matt Merhar mattmerhar@protonmail.com Signed-off-by: Peter Geis pgwipeout@gmail.com --- Changes v2: -Added stable tag. -Improved commit message.
arch/arm/boot/dts/tegra30-ouya.dts | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm/boot/dts/tegra30-ouya.dts b/arch/arm/boot/dts/tegra30-ouya.dts index 74da1360d297..0368b3b816ef 100644 --- a/arch/arm/boot/dts/tegra30-ouya.dts +++ b/arch/arm/boot/dts/tegra30-ouya.dts @@ -4352,8 +4352,8 @@ cam_mclk_pcc0 { nvidia,pins = "cam_mclk_pcc0"; nvidia,function = "vi_alt3"; nvidia,pull = <TEGRA_PIN_PULL_NONE>; - nvidia,tristate = <TEGRA_PIN_ENABLE>; - nvidia,enable-input = <TEGRA_PIN_DISABLE>; + nvidia,tristate = <TEGRA_PIN_DISABLE>; + nvidia,enable-input = <TEGRA_PIN_ENABLE>; }; pcc1 { nvidia,pins = "pcc1";