[PATCH V20 03/22] mmc: core: Announce successful insertion of an SD UHS-II card

Victor Shih
2024-09-05T10:20:19Z

From: Ulf Hansson <ulf.hansson@linaro.org>

To inform the users about SD UHS-II cards, let's extend the print at card
insertion with a "UHS-II" substring. Within this change, it seems
reasonable to convert from using "ultra high speed" into "UHS-I speed", for
the UHS-I type, as it should makes it more clear.

Note that, the new print for UHS-II cards doesn't include the actual
selected speed mode. Instead, this is going to be added from subsequent
change.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---

Updates in V14:
- Move mmc_card_uhs2() to include/linux/mmc/host.h, so that
mmc_card_uhs2() can be available for host drivers.

Updates in V10:
- Modify the commit message.

Updates in V7:
- Drop MMC_TIMING_SD_UHS2 in favor of MMC_TIMING_UHS2_SPEED_A in
mmc_card_uhs2 function.

Updates in V4:
- Make mmc_card_uhs2() take struct mmc_host* as in-param.

---

drivers/mmc/core/bus.c | 4 +++-
include/linux/mmc/host.h | 8 ++++++++
2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index 6731b46e855f..f9a67beb68f0 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -344,7 +344,9 @@ int mmc_add_card(struct mmc_card *card)
if (mmc_card_hs(card))
speed_mode = "high speed ";
else if (mmc_card_uhs(card))
- speed_mode = "ultra high speed ";
+ speed_mode = "UHS-I speed ";
+ else if (mmc_card_uhs2(card->host))
+ speed_mode = "UHS-II speed ";
else if (mmc_card_ddr52(card))
speed_mode = "high speed DDR ";
else if (mmc_card_hs200(card))
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 21df3d6f7473..f1cf09ea1f72 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -637,6 +637,14 @@ static inline int mmc_card_uhs(struct mmc_card *card)
card->host->ios.timing <= MMC_TIMING_UHS_DDR50;
}

+static inline bool mmc_card_uhs2(struct mmc_host *host)
+{
+ return host->ios.timing == MMC_TIMING_UHS2_SPEED_A ||
+ host->ios.timing == MMC_TIMING_UHS2_SPEED_A_HD ||
+ host->ios.timing == MMC_TIMING_UHS2_SPEED_B ||
+ host->ios.timing == MMC_TIMING_UHS2_SPEED_B_HD;
+}
+
void mmc_retune_timer_stop(struct mmc_host *host);

static inline void mmc_retune_needed(struct mmc_host *host)
--
2.25.1