arm64: dts: qcom: sm8650: Enable UHS-I SDR50 and SDR104 SD card modes

The restriction on UHS-I speed modes was added to all SM8650 platforms
by copying it from SM8450 and SM8550 dtsi files, and it was an actually
reproducible problem due to the overclocking of SD cards. Since the latter
issue has been fixed in the SM8650 GCC driver, UHS-I speed modes are
working fine on SM8650 boards, below is the test performed on SM8650-HDK:

SDR50 speed mode:

    mmc0: new UHS-I speed SDR50 SDHC card at address 0001
    mmcblk0: mmc0:0001 00000 14.6 GiB
     mmcblk0: p1

    % dd if=/dev/mmcblk0p1 of=/dev/null bs=1M count=1024
    1024+0 records in
    1024+0 records out
    1073741824 bytes (1.1 GB, 1.0 GiB) copied, 24.8086 s, 43.3 MB/s

SDR104 speed mode:

    mmc0: new UHS-I speed SDR104 SDHC card at address 59b4
    mmcblk0: mmc0:59b4 USDU1 28.3 GiB
     mmcblk0: p1

    % dd if=/dev/mmcblk0p1 of=/dev/null bs=1M count=1024
    1024+0 records in
    1024+0 records out
    1073741824 bytes (1.1 GB, 1.0 GiB) copied, 12.9448 s, 82.9 MB/s

Unset the UHS-I speed mode restrictions from the SM8550 platform dtsi
file, there is no indication that the SDHC controller is broken.

Fixes: 10e024671295 ("arm64: dts: qcom: sm8650: add interconnect dependent device nodes")
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Link: https://lore.kernel.org/r/20260314023715.357512-7-vladimir.zapolskiy@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

diff --git a/arch/arm64/boot/dts/qcom/sm8650.dtsi b/arch/arm64/boot/dts/qcom/sm8650.dtsi
index 75de839f7a2df405ca8518e6559556d2360800c1..64a7480291d841e1d581bf31e37a6a636b0b0912 100644 (file)
--- a/arch/arm64/boot/dts/qcom/sm8650.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8650.dtsi
@@ -4976,9 +4976,6 @@
 
                        bus-width = <4>;
 
-                       /* Forbid SDR104/SDR50 - broken hw! */
-                       sdhci-caps-mask = <0x3 0>;
-
                        qcom,dll-config = <0x0007642c>;
                        qcom,ddr-config = <0x80040868>;