From: Wenbin Mei <wenbin.mei@mediatek.com> To: Ulf Hansson <ulf.hansson@linaro.org> Cc: Matthias Brugger <matthias.bgg@gmail.com>, Chaotian Jing <chaotian.jing@mediatek.com>, Wenbin Mei <wenbin.mei@mediatek.com>, <linux-mmc@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>, <linux-mediatek@lists.infradead.org>, <linux-kernel@vger.kernel.org> Subject: [PATCH] mmc: mtk-sd: Clear interrupts when cqe off/disable Date: Thu, 28 Jul 2022 16:00:48 +0800 [thread overview] Message-ID: <20220728080048.21336-1-wenbin.mei@mediatek.com> (raw) Currently we don't clear MSDC interrupts when cqe off/disable, which led to the data complete interrupt will be reserved for the next command. If the next command with data transfer after cqe off/disable, we process the CMD ready interrupt and trigger DMA start for data, but the data complete interrupt is already exists, then SW assume that the data transfer is complete, SW will trigger DMA stop, but the data may not be transmitted yet or is transmitting, so we may encounter the following error: mtk-msdc 11230000.mmc: CMD bus busy detected. Signed-off-by: Wenbin Mei <wenbin.mei@mediatek.com> --- drivers/mmc/host/mtk-sd.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c index 4ff73d1883de..69d78604d1fc 100644 --- a/drivers/mmc/host/mtk-sd.c +++ b/drivers/mmc/host/mtk-sd.c @@ -2446,6 +2446,9 @@ static void msdc_cqe_disable(struct mmc_host *mmc, bool recovery) /* disable busy check */ sdr_clr_bits(host->base + MSDC_PATCH_BIT1, MSDC_PB1_BUSY_CHECK_SEL); + val = readl(host->base + MSDC_INT); + writel(val, host->base + MSDC_INT); + if (recovery) { sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_STOP, 1); @@ -2932,11 +2935,14 @@ static int __maybe_unused msdc_suspend(struct device *dev) struct mmc_host *mmc = dev_get_drvdata(dev); struct msdc_host *host = mmc_priv(mmc); int ret; + u32 val; if (mmc->caps2 & MMC_CAP2_CQE) { ret = cqhci_suspend(mmc); if (ret) return ret; + val = readl(host->base + MSDC_INT); + writel(val, host->base + MSDC_INT); } /* -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Wenbin Mei <wenbin.mei@mediatek.com> To: Ulf Hansson <ulf.hansson@linaro.org> Cc: Matthias Brugger <matthias.bgg@gmail.com>, Chaotian Jing <chaotian.jing@mediatek.com>, Wenbin Mei <wenbin.mei@mediatek.com>, <linux-mmc@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>, <linux-mediatek@lists.infradead.org>, <linux-kernel@vger.kernel.org> Subject: [PATCH] mmc: mtk-sd: Clear interrupts when cqe off/disable Date: Thu, 28 Jul 2022 16:00:48 +0800 [thread overview] Message-ID: <20220728080048.21336-1-wenbin.mei@mediatek.com> (raw) Currently we don't clear MSDC interrupts when cqe off/disable, which led to the data complete interrupt will be reserved for the next command. If the next command with data transfer after cqe off/disable, we process the CMD ready interrupt and trigger DMA start for data, but the data complete interrupt is already exists, then SW assume that the data transfer is complete, SW will trigger DMA stop, but the data may not be transmitted yet or is transmitting, so we may encounter the following error: mtk-msdc 11230000.mmc: CMD bus busy detected. Signed-off-by: Wenbin Mei <wenbin.mei@mediatek.com> --- drivers/mmc/host/mtk-sd.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c index 4ff73d1883de..69d78604d1fc 100644 --- a/drivers/mmc/host/mtk-sd.c +++ b/drivers/mmc/host/mtk-sd.c @@ -2446,6 +2446,9 @@ static void msdc_cqe_disable(struct mmc_host *mmc, bool recovery) /* disable busy check */ sdr_clr_bits(host->base + MSDC_PATCH_BIT1, MSDC_PB1_BUSY_CHECK_SEL); + val = readl(host->base + MSDC_INT); + writel(val, host->base + MSDC_INT); + if (recovery) { sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_STOP, 1); @@ -2932,11 +2935,14 @@ static int __maybe_unused msdc_suspend(struct device *dev) struct mmc_host *mmc = dev_get_drvdata(dev); struct msdc_host *host = mmc_priv(mmc); int ret; + u32 val; if (mmc->caps2 & MMC_CAP2_CQE) { ret = cqhci_suspend(mmc); if (ret) return ret; + val = readl(host->base + MSDC_INT); + writel(val, host->base + MSDC_INT); } /* -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2022-07-28 8:01 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-07-28 8:00 Wenbin Mei [this message] 2022-07-28 8:00 ` [PATCH] mmc: mtk-sd: Clear interrupts when cqe off/disable Wenbin Mei 2022-08-15 18:28 ` Ulf Hansson 2022-08-15 18:28 ` Ulf Hansson
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20220728080048.21336-1-wenbin.mei@mediatek.com \ --to=wenbin.mei@mediatek.com \ --cc=chaotian.jing@mediatek.com \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-mediatek@lists.infradead.org \ --cc=linux-mmc@vger.kernel.org \ --cc=matthias.bgg@gmail.com \ --cc=ulf.hansson@linaro.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.