From: Wenbin Mei <wenbin.mei@mediatek.com>
To: Ulf Hansson <ulf.hansson@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
Matthias Brugger <matthias.bgg@gmail.com>
Cc: Chaotian Jing <chaotian.jing@mediatek.com>,
Avri Altman <avri.altman@wdc.com>,
Wenbin Mei <wenbin.mei@mediatek.com>,
Wolfram Sang <wsa+renesas@sang-engineering.com>,
Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
Linus Walleij <linus.walleij@linaro.org>,
Yue Hu <huyue2@yulong.com>, Bean Huo <beanhuo@micron.com>,
Adrian Hunter <adrian.hunter@intel.com>,
<linux-mmc@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>,
<linux-kernel@vger.kernel.org>
Subject: [RESEND v4 2/3] mmc: core: add tuning support for HS400 mode
Date: Fri, 17 Sep 2021 20:48:02 +0800 [thread overview]
Message-ID: <20210917124803.22871-3-wenbin.mei@mediatek.com> (raw)
In-Reply-To: <20210917124803.22871-1-wenbin.mei@mediatek.com>
This adds the execute_hs400_tuning callback function for HS400 tuning
operations and move the declaration of mmc_get_ext_csd() to
include/linux/mmc/host.h.
If execute_hs400_tuning is not implemented then they are not called.
That means there should be no affect for existing drivers as none implemt
these ops.
Signed-off-by: Wenbin Mei <wenbin.mei@mediatek.com>
---
drivers/mmc/core/mmc.c | 8 ++++++++
drivers/mmc/core/mmc_ops.h | 1 -
include/linux/mmc/host.h | 4 ++++
3 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 838726b68ff3..0aa72acd8612 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1222,6 +1222,14 @@ static int mmc_select_hs400(struct mmc_card *card)
mmc_set_timing(host, MMC_TIMING_MMC_HS400);
mmc_set_bus_speed(card);
+ if (host->ops->execute_hs400_tuning) {
+ mmc_retune_disable(host);
+ err = host->ops->execute_hs400_tuning(host, card);
+ mmc_retune_enable(host);
+ if (err)
+ goto out_err;
+ }
+
if (host->ops->hs400_complete)
host->ops->hs400_complete(host);
diff --git a/drivers/mmc/core/mmc_ops.h b/drivers/mmc/core/mmc_ops.h
index ae25ffc2e870..e5e94567a9a9 100644
--- a/drivers/mmc/core/mmc_ops.h
+++ b/drivers/mmc/core/mmc_ops.h
@@ -38,7 +38,6 @@ int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp);
int mmc_spi_set_crc(struct mmc_host *host, int use_crc);
int mmc_bus_test(struct mmc_card *card, u8 bus_width);
int mmc_can_ext_csd(struct mmc_card *card);
-int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd);
int mmc_switch_status(struct mmc_card *card, bool crc_err_fatal);
bool mmc_prepare_busy_cmd(struct mmc_host *host, struct mmc_command *cmd,
unsigned int timeout_ms);
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index ff1a251bb0bc..072650aeb2a7 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -162,6 +162,9 @@ struct mmc_host_ops {
/* Prepare HS400 target operating frequency depending host driver */
int (*prepare_hs400_tuning)(struct mmc_host *host, struct mmc_ios *ios);
+ /* Execute HS400 tuning depending host driver */
+ int (*execute_hs400_tuning)(struct mmc_host *host, struct mmc_card *card);
+
/* Prepare switch to DDR during the HS400 init sequence */
int (*hs400_prepare_ddr)(struct mmc_host *host);
@@ -633,5 +636,6 @@ static inline enum dma_data_direction mmc_get_dma_dir(struct mmc_data *data)
int mmc_send_tuning(struct mmc_host *host, u32 opcode, int *cmd_error);
int mmc_send_abort_tuning(struct mmc_host *host, u32 opcode);
+int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd);
#endif /* LINUX_MMC_HOST_H */
--
2.25.1
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next prev parent reply other threads:[~2021-09-17 12:48 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-17 12:48 [RESEND v4 0/3] mmc: mediatek: Add HS400 online tuning support Wenbin Mei
2021-09-17 12:48 ` [RESEND v4 1/3] dt-bindings: mmc: mtk-sd: add hs400 dly3 setting Wenbin Mei
2021-09-17 12:48 ` Wenbin Mei [this message]
2021-09-17 12:48 ` [RESEND v4 3/3] mmc: mediatek: Add HS400 online tuning support Wenbin Mei
2021-09-23 18:49 ` [RESEND v4 0/3] " Ulf Hansson
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