From: Ulf Hansson <ulf.hansson@linaro.org>
To: linux-mmc@vger.kernel.org, Ulf Hansson <ulf.hansson@linaro.org>,
Adrian Hunter <adrian.hunter@intel.com>,
Douglas Anderson <dianders@chromium.org>,
Matthias Kaehlcke <mka@chromium.org>
Cc: Shawn Lin <shawn.lin@rock-chips.com>,
Jaehoon Chung <jh80.chung@samsung.com>,
Yong Mao <yong.mao@mediatek.com>,
Chaotian Jing <chaotian.jing@mediatek.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH v2 03/11] mmc: mtk-sd: Re-store SDIO IRQs mask at system resume
Date: Sun, 8 Sep 2019 12:12:28 +0200 [thread overview]
Message-ID: <20190908101236.2802-4-ulf.hansson@linaro.org> (raw)
In-Reply-To: <20190908101236.2802-1-ulf.hansson@linaro.org>
In cases when SDIO IRQs have been enabled, runtime suspend is prevented by
the driver. However, this still means msdc_runtime_suspend|resume() gets
called during system suspend/resume, via pm_runtime_force_suspend|resume().
This means during system suspend/resume, the register context of the mtk-sd
device most likely loses its register context, even in cases when SDIO IRQs
have been enabled.
To re-enable the SDIO IRQs during system resume, the mtk-sd driver
currently relies on the mmc core to re-enable the SDIO IRQs when it resumes
the SDIO card, but this isn't the recommended solution. Instead, it's
better to deal with this locally in the mtk-sd driver, so let's do that.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
drivers/mmc/host/mtk-sd.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 6946bb040a28..ae7688098b7b 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -2408,6 +2408,9 @@ static void msdc_save_reg(struct msdc_host *host)
} else {
host->save_para.pad_tune = readl(host->base + tune_reg);
}
+
+ if (sdio_irq_claimed(host->mmc))
+ __msdc_enable_sdio_irq(host, 1);
}
static void msdc_restore_reg(struct msdc_host *host)
--
2.17.1
next prev parent reply other threads:[~2019-09-08 10:12 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-08 10:12 [PATCH v2 00/11] mmc: core: PM fixes/improvements for SDIO IRQs Ulf Hansson
2019-09-08 10:12 ` [PATCH v2 01/11] mmc: core: Add helper function to indicate if SDIO IRQs is enabled Ulf Hansson
2019-09-09 22:32 ` Doug Anderson
2019-09-08 10:12 ` [PATCH v2 02/11] mmc: dw_mmc: Re-store SDIO IRQs mask at system resume Ulf Hansson
2019-09-09 22:32 ` Doug Anderson
2019-09-08 10:12 ` Ulf Hansson [this message]
2019-09-09 22:29 ` [PATCH v2 03/11] mmc: mtk-sd: " Doug Anderson
2019-09-11 12:06 ` Ulf Hansson
2019-09-08 10:12 ` [PATCH v2 04/11] mmc: core: Move code to get pending SDIO IRQs to a function Ulf Hansson
2019-09-09 22:32 ` Doug Anderson
2019-09-08 10:12 ` [PATCH v2 05/11] mmc: core: Clarify sdio_irq_pending flag for MMC_CAP2_SDIO_IRQ_NOTHREAD Ulf Hansson
2019-09-09 22:33 ` Doug Anderson
2019-09-08 10:12 ` [PATCH v2 06/11] mmc: core: Clarify that the ->ack_sdio_irq() callback is mandatory Ulf Hansson
2019-09-09 22:34 ` Doug Anderson
2019-09-08 10:12 ` [PATCH v2 07/11] mmc: core: WARN if SDIO IRQs are enabled for non-powered card in suspend Ulf Hansson
2019-09-08 10:12 ` [PATCH v2 08/11] mmc: core: Fixup processing of SDIO IRQs during system suspend/resume Ulf Hansson
2019-09-09 22:34 ` Doug Anderson
2019-09-08 10:12 ` [PATCH v2 09/11] mmc: sdhci: Drop redundant check in sdhci_ack_sdio_irq() Ulf Hansson
2019-09-09 11:19 ` Adrian Hunter
2019-09-08 10:12 ` [PATCH v2 10/11] mmc: sdhci: Drop redundant code for SDIO IRQs Ulf Hansson
2019-09-08 10:12 ` [PATCH v2 11/11] mmc: sdhci: Convert to use sdio_irq_claimed() Ulf Hansson
2019-09-11 14:21 ` [PATCH v2 00/11] mmc: core: PM fixes/improvements for SDIO IRQs Ulf Hansson
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