Am 27.01.25 um 15:03 schrieb Adrian Hunter:
> On 27/01/25 15:35, Josua Mayer wrote:
>> This reverts commit 941a7abd4666912b84ab209396fdb54b0dae685d.
>>
>> This commit uses presence of device-tree properties vmmc-supply and
>> vqmmc-supply for deciding whether to enable a quirk affecting timing of
>> clock and data.
>> The intention was to address issues observed with eMMC and SD on AM62
>> platforms.
>>
>> This new quirk is however also enabled for AM64 breaking microSD access
>> on the SolidRun HimmingBoard-T which is supported in-tree since v6.11,
>> causing a regression. During boot microSD initialization now fails with
>> the error below:
>>
>> [ 2.008520] mmc1: SDHCI controller on fa00000.mmc [fa00000.mmc] using ADMA 64-bit
>> [ 2.115348] mmc1: error -110 whilst initialising SD card
>>
>> The heuristics for enabling the quirk are clearly not correct as they
>> break at least one but potentially many existing boards.
>>
>> Revert the change and restore original behaviour until a more
>> appropriate method of selecting the quirk is derived.
>>
>> Fixes: <941a7abd4666> ("mtd: spi-nor: core: replace dummy buswidth from addr to data")
> Angle brackets < > should not be present,
Adrian, Greg, thank you for pointing this out, I will resolve it with v2.
> and the commit
> description is incorrect.
Now I see why checkpatch had complained before adding <>,
Thank you!
>
>> Closes: https://lore.kernel.org/linux-mmc/a70fc9fc-186f-4165-a652-3de50733763a@xxxxxxxxxxxxx/
>> Cc: stable@xxxxxxxxxxxxxxx # 6.13
> With a Fixes tag, better to leave out "# 6.13"
Okay.
>
>> Signed-off-by: Josua Mayer <josua@xxxxxxxxxxxxx>
> In the absence of an alternative, we have to revert, so:
I do not understand the quirk sufficiently to suggest an alternative :(.
>
> Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
>
>> ---
>> drivers/mmc/host/sdhci_am654.c | 30 ------------------------------
>> 1 file changed, 30 deletions(-)
>>
>> diff --git a/drivers/mmc/host/sdhci_am654.c b/drivers/mmc/host/sdhci_am654.c
>> index b73f673db92bbc042392995e715815e15ace6005..f75c31815ab00d17b5757063521f56ba5643babe 100644
>> --- a/drivers/mmc/host/sdhci_am654.c
>> +++ b/drivers/mmc/host/sdhci_am654.c
>> @@ -155,7 +155,6 @@ struct sdhci_am654_data {
>> u32 tuning_loop;
>>
>> #define SDHCI_AM654_QUIRK_FORCE_CDTEST BIT(0)
>> -#define SDHCI_AM654_QUIRK_SUPPRESS_V1P8_ENA BIT(1)
>> };
>>
>> struct window {
>> @@ -357,29 +356,6 @@ static void sdhci_j721e_4bit_set_clock(struct sdhci_host *host,
>> sdhci_set_clock(host, clock);
>> }
>>
>> -static int sdhci_am654_start_signal_voltage_switch(struct mmc_host *mmc, struct mmc_ios *ios)
>> -{
>> - struct sdhci_host *host = mmc_priv(mmc);
>> - struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
>> - struct sdhci_am654_data *sdhci_am654 = sdhci_pltfm_priv(pltfm_host);
>> - int ret;
>> -
>> - if ((sdhci_am654->quirks & SDHCI_AM654_QUIRK_SUPPRESS_V1P8_ENA) &&
>> - ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) {
>> - if (!IS_ERR(mmc->supply.vqmmc)) {
>> - ret = mmc_regulator_set_vqmmc(mmc, ios);
>> - if (ret < 0) {
>> - pr_err("%s: Switching to 1.8V signalling voltage failed,\n",
>> - mmc_hostname(mmc));
>> - return -EIO;
>> - }
>> - }
>> - return 0;
>> - }
>> -
>> - return sdhci_start_signal_voltage_switch(mmc, ios);
>> -}
>> -
>> static u8 sdhci_am654_write_power_on(struct sdhci_host *host, u8 val, int reg)
>> {
>> writeb(val, host->ioaddr + reg);
>> @@ -868,11 +844,6 @@ static int sdhci_am654_get_of_property(struct platform_device *pdev,
>> if (device_property_read_bool(dev, "ti,fails-without-test-cd"))
>> sdhci_am654->quirks |= SDHCI_AM654_QUIRK_FORCE_CDTEST;
>>
>> - /* Suppress v1p8 ena for eMMC and SD with vqmmc supply */
>> - if (!!of_parse_phandle(dev->of_node, "vmmc-supply", 0) ==
>> - !!of_parse_phandle(dev->of_node, "vqmmc-supply", 0))
>> - sdhci_am654->quirks |= SDHCI_AM654_QUIRK_SUPPRESS_V1P8_ENA;
>> -
>> sdhci_get_of_property(pdev);
>>
>> return 0;
>> @@ -969,7 +940,6 @@ static int sdhci_am654_probe(struct platform_device *pdev)
>> goto err_pltfm_free;
>> }
>>
>> - host->mmc_host_ops.start_signal_voltage_switch = sdhci_am654_start_signal_voltage_switch;
>> host->mmc_host_ops.execute_tuning = sdhci_am654_execute_tuning;
>>
>> pm_runtime_get_noresume(dev);
>>
>> ---
>> base-commit: ffd294d346d185b70e28b1a28abe367bbfe53c04
>> change-id: 20250127-am654-mmc-regression-ed289f8967c2
>>
>> Best regards,
