diff options
| author | Chaotian Jing <chaotian.jing@mediatek.com> | 2019-12-04 15:19:58 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-31 12:37:54 +0100 |
| commit | 8bcc8514f821b27652d2019e0ae82f6482be56c7 (patch) | |
| tree | 9ba424dba81c57bf660263677246b84f2e4b30f5 /drivers/mmc | |
| parent | 75bfb048437fba5dd6cfc2535c53ff50197c3b1a (diff) | |
mmc: mediatek: fix CMD_TA to 2 for MT8173 HS200/HS400 mode
commit 8f34e5bd7024d1ffebddd82d7318b1be17be9e9a upstream.
there is a chance that always get response CRC error after HS200 tuning,
the reason is that need set CMD_TA to 2. this modification is only for
MT8173.
Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Tested-by: Hsin-Yi Wang <hsinyi@chromium.org>
Cc: stable@vger.kernel.org
Fixes: 1ede5cb88a29 ("mmc: mediatek: Use data tune for CMD line tune")
Link: https://lore.kernel.org/r/20191204071958.18553-1-chaotian.jing@mediatek.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/mtk-sd.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c index a2ac9938d945..1a5d5c40324b 100644 --- a/drivers/mmc/host/mtk-sd.c +++ b/drivers/mmc/host/mtk-sd.c @@ -212,6 +212,8 @@ #define MSDC_PATCH_BIT_SPCPUSH (0x1 << 29) /* RW */ #define MSDC_PATCH_BIT_DECRCTMO (0x1 << 30) /* RW */ +#define MSDC_PATCH_BIT1_CMDTA (0x7 << 3) /* RW */ + #define MSDC_PAD_TUNE_DATWRDLY (0x1f << 0) /* RW */ #define MSDC_PAD_TUNE_DATRRDLY (0x1f << 8) /* RW */ #define MSDC_PAD_TUNE_CMDRDLY (0x1f << 16) /* RW */ @@ -1442,6 +1444,7 @@ static int hs400_tune_response(struct mmc_host *mmc, u32 opcode) /* select EMMC50 PAD CMD tune */ sdr_set_bits(host->base + PAD_CMD_TUNE, BIT(0)); + sdr_set_field(host->base + MSDC_PATCH_BIT1, MSDC_PATCH_BIT1_CMDTA, 2); if (mmc->ios.timing == MMC_TIMING_MMC_HS200 || mmc->ios.timing == MMC_TIMING_UHS_SDR104) |