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[120.74.102.185]) by smtp.gmail.com with ESMTPSA id m13sm3703040pjr.30.2020.11.05.18.28.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 Nov 2020 18:28:18 -0800 (PST) From: AKASHI Takahiro To: ulf.hansson@linaro.org, adrian.hunter@intel.com Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, ben.chuang@genesyslogic.com.tw, greg.tu@genesyslogic.com.tw, AKASHI Takahiro Subject: [RFC PATCH v3.1 07/27] mmc: core: UHS-II support, set APP_CMD bit if necessary Date: Fri, 6 Nov 2020 11:27:06 +0900 Message-Id: <20201106022726.19831-8-takahiro.akashi@linaro.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201106022726.19831-1-takahiro.akashi@linaro.org> References: <20201106022726.19831-1-takahiro.akashi@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In UHS-II mode, MMC_APP_CMD command need not to be sent. Instead, APP_CMD bit in a packet should be set. Signed-off-by: Ben Chuang Signed-off-by: AKASHI Takahiro --- drivers/mmc/core/sd_ops.c | 9 +++++++++ drivers/mmc/core/uhs2.c | 4 ++++ 2 files changed, 13 insertions(+) diff --git a/drivers/mmc/core/sd_ops.c b/drivers/mmc/core/sd_ops.c index f58bb50872f6..9dc296356928 100644 --- a/drivers/mmc/core/sd_ops.c +++ b/drivers/mmc/core/sd_ops.c @@ -26,6 +26,15 @@ int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card) if (WARN_ON(card && card->host != host)) return -EINVAL; + /* UHS2 packet has APP bit so only set APP_CMD flag here. + * Will set the APP bit when assembling UHS2 packet. + */ + if (host->flags & MMC_UHS2_SUPPORT && + host->flags & MMC_UHS2_INITIALIZED) { + host->flags |= MMC_UHS2_APP_CMD; + return 0; + } + cmd.opcode = MMC_APP_CMD; if (card) { diff --git a/drivers/mmc/core/uhs2.c b/drivers/mmc/core/uhs2.c index 1f6d0e0cf355..c0d61e7d9e4b 100644 --- a/drivers/mmc/core/uhs2.c +++ b/drivers/mmc/core/uhs2.c @@ -835,6 +835,10 @@ int uhs2_prepare_sd_cmd(struct mmc_host *host, struct mmc_request *mrq) header |= UHS2_PACKET_TYPE_CCMD; arg = cmd->opcode << UHS2_SD_CMD_INDEX_POS; + if (host->flags & MMC_UHS2_APP_CMD) { + arg |= UHS2_SD_CMD_APP; + host->flags &= ~MMC_UHS2_APP_CMD; + } uhs2_cmd = cmd->uhs2_cmd; payload = uhs2_cmd->payload; -- 2.28.0