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mmc: sdhci: Fix HISPD bit handling

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SDHCI HISPD bits need to be configured based on desired mmc
timings mode and some HISPD quirks.

So, handle the HISPD bit based on the mmc computed selected
mode(timing parameter) rather than fixed mmc card clock
frequency.

Linux handle the HISPD similar like this in below commit but no
SDHCI_QUIRK_BROKEN_HISPD_MODE,

commit <501639bf2173> ("mmc: sdhci: fix SDHCI_QUIRK_NO_HISPD_BIT handling")

This eventually fixed the mmc write issue observed in
rk3399 sdhci controller.

Bug log for refernece,
=> gpt write mmc 0 $partitions
Writing GPT: mmc write failed
** Can't write to device 0 **
** Can't write to device 0 **
error!

Cc: Kever Yang <kever.yang@rock-chips.com>
Cc: Peng Fan <peng.fan@nxp.com>
Peng Fan: added back "ctrl &= ~SDHCI_CTRL_HISPD;" per Jaehoon's suggestion
Tested-by: Suniel Mahesh <sunil@amarulasolutions.com> # roc-rk3399-pc
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
This commit is contained in:
Jagan Teki 2020-06-18 19:33:12 +05:30 • committed by Peng Fan
parent fe95905ffe
commit f12341a952
1 changed files with 19 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

25
drivers/mmc/sdhci.c
View file

@ -567,6 +567,7 @@ static int sdhci_set_ios(struct mmc *mmc)
#endif
u32 ctrl;
struct sdhci_host *host = mmc->priv;
bool no_hispd_bit = false;
if (host->ops && host->ops->set_control_reg)
host->ops->set_control_reg(host);
@ -594,14 +595,26 @@ static int sdhci_set_ios(struct mmc *mmc)
ctrl &= ~SDHCI_CTRL_4BITBUS;
}
if (mmc->clock > 26000000)
ctrl |= SDHCI_CTRL_HISPD;
else
ctrl &= ~SDHCI_CTRL_HISPD;
if ((host->quirks & SDHCI_QUIRK_NO_HISPD_BIT) ||
(host->quirks & SDHCI_QUIRK_BROKEN_HISPD_MODE))
(host->quirks & SDHCI_QUIRK_BROKEN_HISPD_MODE)) {
ctrl &= ~SDHCI_CTRL_HISPD;
no_hispd_bit = true;
}
if (!no_hispd_bit) {
if (mmc->selected_mode == MMC_HS ||
mmc->selected_mode == SD_HS ||
mmc->selected_mode == MMC_DDR_52 ||
mmc->selected_mode == MMC_HS_200 ||
mmc->selected_mode == MMC_HS_400 ||
mmc->selected_mode == UHS_SDR25 ||
mmc->selected_mode == UHS_SDR50 ||
mmc->selected_mode == UHS_SDR104 ||
mmc->selected_mode == UHS_DDR50)
ctrl |= SDHCI_CTRL_HISPD;
else
ctrl &= ~SDHCI_CTRL_HISPD;
}
sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);