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Standard tuning only try 40 times to find first pass window, but this > pass window maybe not the best pass window. > > 2. Sometimes there are two tuning pass windows and the gap between > those two windows may only have one cell. If tuning step > 1, the gap may > just be skipped and host assumes those two windows as a continuous > windows. This will cause a bad delay cell near the gap to be selected. > > 3. Standard tuning logic need to detect at least one success and failure > to pass the tuning. If all cells in the tuning window pass, the hardware > will not set the SDHCI_CTRL_TUNED_CLK bit, causing tuning failed. > > 4. Standard tuning logic only check the CRC, do not really compare the data > pattern. If data pins are connected incorrectly, standard will not detect > this kind of issue. > > Switch to manual tuning to avoid those limitations Is it necessary to have standard tuning at all then? > > Signed-off-by: Luke Wang > --- > drivers/mmc/host/sdhci-esdhc-imx.c | 16 ++++++++-------- > 1 file changed, 8 insertions(+), 8 deletions(-) > > diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c > index fd0ad0ad1519..9b66e07ed8e7 100644 > --- a/drivers/mmc/host/sdhci-esdhc-imx.c > +++ b/drivers/mmc/host/sdhci-esdhc-imx.c > @@ -275,35 +275,35 @@ static const struct esdhc_soc_data usdhc_imx6q_data = { > }; > > static const struct esdhc_soc_data usdhc_imx6sl_data = { > - .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING > + .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_MAN_TUNING > | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_ERR004536 > | ESDHC_FLAG_HS200 > | ESDHC_FLAG_BROKEN_AUTO_CMD23, > }; > > static const struct esdhc_soc_data usdhc_imx6sll_data = { > - .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING > + .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_MAN_TUNING > | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 > | ESDHC_FLAG_HS400 > | ESDHC_FLAG_STATE_LOST_IN_LPMODE, > }; > > static const struct esdhc_soc_data usdhc_imx6sx_data = { > - .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING > + .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_MAN_TUNING > | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 > | ESDHC_FLAG_STATE_LOST_IN_LPMODE > | ESDHC_FLAG_BROKEN_AUTO_CMD23, > }; > > static const struct esdhc_soc_data usdhc_imx6ull_data = { > - .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING > + .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_MAN_TUNING > | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 > | ESDHC_FLAG_ERR010450 > | ESDHC_FLAG_STATE_LOST_IN_LPMODE, > }; > > static const struct esdhc_soc_data usdhc_imx7d_data = { > - .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING > + .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_MAN_TUNING > | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 > | ESDHC_FLAG_HS400 > | ESDHC_FLAG_STATE_LOST_IN_LPMODE > @@ -319,7 +319,7 @@ static struct esdhc_soc_data usdhc_s32g2_data = { > }; > > static struct esdhc_soc_data usdhc_imx7ulp_data = { > - .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING > + .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_MAN_TUNING > | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 > | ESDHC_FLAG_PMQOS | ESDHC_FLAG_HS400 > | ESDHC_FLAG_STATE_LOST_IN_LPMODE, > @@ -332,7 +332,7 @@ static struct esdhc_soc_data usdhc_imxrt1050_data = { > }; > > static struct esdhc_soc_data usdhc_imx8qxp_data = { > - .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING > + .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_MAN_TUNING > | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 > | ESDHC_FLAG_HS400 | ESDHC_FLAG_HS400_ES > | ESDHC_FLAG_STATE_LOST_IN_LPMODE > @@ -341,7 +341,7 @@ static struct esdhc_soc_data usdhc_imx8qxp_data = { > }; > > static struct esdhc_soc_data usdhc_imx8mm_data = { > - .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING > + .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_MAN_TUNING > | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 > | ESDHC_FLAG_HS400 | ESDHC_FLAG_HS400_ES > | ESDHC_FLAG_STATE_LOST_IN_LPMODE,