mmc: mediatek: do not tune data for HS400 mode (5462ff39) · Commits · 戴 / test

for hs400 mode, should only tune DS delay, should not tune PAD_TUNE for data path. if eMMC will run at hs400 mode, do not tune data while call ops->execute_tuning(). Signed-off-by:

Chaotian Jing <chaotian.jing@mediatek.com> Signed-off-by:

Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/mtk-sd.c

+7 −3

Original line number	Diff line number	Diff line
		@@ -326,6 +326,7 @@ struct msdc_host {
		unsigned char timing;
		bool vqmmc_enabled;
		u32 hs400_ds_delay;
		bool hs400_mode; /* current eMMC will run at hs400 mode */
		struct msdc_save_para save_para; /* used when gate HCLK */
		};

		@@ -1402,9 +1403,11 @@ static int msdc_execute_tuning(struct mmc_host *mmc, u32 opcode)
		dev_err(host->dev, "Tune response fail!\n");
		return ret;
		}
		if (host->hs400_mode == false) {
		ret = msdc_tune_data(mmc, opcode);
		if (ret == -EIO)
		dev_err(host->dev, "Tune data fail!\n");
		}

		return ret;
		}
		@@ -1412,6 +1415,7 @@ static int msdc_execute_tuning(struct mmc_host *mmc, u32 opcode)
		static int msdc_prepare_hs400_tuning(struct mmc_host mmc, struct mmc_ios ios)
		{
		struct msdc_host *host = mmc_priv(mmc);
		host->hs400_mode = true;

		writel(host->hs400_ds_delay, host->base + PAD_DS_TUNE);
		return 0;

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