TDA4VM: TDA4VM

hutian

Part Number: TDA4VM

Hi experts,

Currently, i am facing the error with the SD card. I guess the TDA4VM's SD card defaut working on 1.8 and it's ok for my SD card (SanDisk 16G). But if i setting the voltage to 3.3V, then i will get the "-110" error.

Could you please help me to solve this issue?

The serial log is shown below:

NOTICE: BL31: v2.2(release):ti2019.05-rc1
NOTICE: BL31: Built : 09:42:32, Mar 6 2020
I/TC:
I/TC: OP-TEE version: ti2019.05-rc1-dev (gcc version 8.3.0 (GNU Toolchain for the A-profile Architecture 8.3-2019.03 (arm-rel-8.36))) #1 Fri Mar 6 10:00:07 UTC 2020 aarch64
I/TC: Initialized

U-Boot SPL 2019.01-gecd86d0c13 (Apr 21 2020 - 07:11:37 +0000)
Detected: J7X-BASE-CPB rev E3
Detected: J7X-VSC8514-ETH rev E2
Trying to boot from MMC2
spl: mmc init failed with error: -110
SPL: failed to boot from all boot devices
### ERROR ### Please RESET the board ###

over 5 years ago

0 Vishal Mahaveer over 5 years ago

TI__Mastermind 33420 points

Hi,

Could you explain more on "But if i setting the voltage to 3.3V"?
Did you update u-boot dts and the board modification?

TI EVM uses a regulator with range of 1.8v to 3.3v. Based on the speed more voltage is selected.

&main_sdhci1 {
        /* SD/MMC */
        pinctrl-names = "default";
        pinctrl-0 = <&main_mmc1_pins_default>;
        ti,driver-strength-ohm = <50>;
        vmmc-supply = <&vdd_mmc1>;
        vqmmc-supply = <&vdd_sd_dv_alt>;
};

        vdd_sd_dv_alt: gpio-regulator-TLV71033 {
                compatible = "regulator-gpio";
                pinctrl-names = "default";
                pinctrl-0 = <&vdd_sd_dv_alt_pins_default>;
                regulator-name = "tlv71033";
                regulator-min-microvolt = <1800000>;
                regulator-max-microvolt = <3300000>;
                regulator-boot-on;
                u-boot,dm-spl;
                vin-supply = <&vsys_5v0>;
                gpios = <&main_gpio0 117 GPIO_ACTIVE_HIGH>;
                states = <1800000 0x0
                          3300000 0x1>;
        };

Regards,
Vishal

0 hutian over 5 years ago in reply to Vishal Mahaveer

Expert 1785 points

Hi Vishal,

Thank you for your help. After modified dts of sdhci and disable some feature, i can read /write SD card working on 3.3v now. The modified part is shown below:

376 main_sdhci1: sdhci@4fb0000 {
377 compatible = "ti,j721e-sdhci-4bit";
378 reg = <0x0 0x04fb0000 0x0 0x1000>, <0x0 0x4fb8000 0x0 0x400>;
379 interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
380 power-domains = <&k3_pds 92 TI_SCI_PD_EXCLUSIVE>;
381 clock-names = "clk_xin", "clk_ahb";
382 clocks = <&k3_clks 92 0>, <&k3_clks 92 5>;
383 assigned-clocks = <&k3_clks 92 0>;
384 assigned-clock-parents = <&k3_clks 92 1>;
385 ti,otap-del-sel-legacy = <0x0>;
386 /*
387 ti,otap-del-sel-sd-hs = <0xf>;
388 ti,otap-del-sel-sdr12 = <0xf>;
389 ti,otap-del-sel-sdr25 = <0xf>;
390 ti,otap-del-sel-sdr50 = <0xc>;
391 ti,otap-del-sel-sdr104 = <0x5>;
392 ti,otap-del-sel-ddr50 = <0xc>;
393 sdhci-caps-mask = <0x2 0x0>;
394 */
395 ti,trm-icp = <0x8>;
396
397 dma-coherent;}

I don't know whether it is appropriate to modify like this. By the way, does TI have a recommended SD Card type?

Thanks,

Hutian

0 Vishal Mahaveer over 5 years ago in reply to hutian

TI__Mastermind 33420 points

Hi,

These changes are not the right way to disable high speed modes. Updating sdhci-caps-mask property in dts is better way to disable high speed modes.
Could you try just doing below change to sdhci-caps-mask in dts and test?

sdhci-caps-mask = <0x8000000F 0x0>;

There is no recommendation on SD card type, all SD card are expected to work.

Regards,
Vishal

0 hutian over 5 years ago in reply to Vishal Mahaveer

Expert 1785 points

Hi Vishal,

Follow your instruction, it works on my side.

Many thanks,

Hutian

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