* [PATCH] mmc: mediatek: add wait dma stop done flow
@ 2021-08-06 2:30 Derong Liu
2021-08-06 10:42 ` Matthias Brugger
0 siblings, 1 reply; 2+ messages in thread
From: Derong Liu @ 2021-08-06 2:30 UTC (permalink / raw)
To: Chaotian Jing, Ulf Hansson, Matthias Brugger
Cc: linux-mmc, linux-arm-kernel, linux-mediatek, linux-kernel,
wsp_upstream, Peng Zhou, Derong Liu
From: mtk13858 <derong.liu@mediatek.com>
it needs to wait for dma stop done after set dma stop.
Signed-off-by: mtk13858 <derong.liu@mediatek.com>
---
drivers/mmc/host/mtk-sd.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 4dfc246c5f95..1dfd2842471b 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -2339,6 +2339,8 @@ static void msdc_cqe_disable(struct mmc_host *mmc, bool recovery)
if (recovery) {
sdr_set_field(host->base + MSDC_DMA_CTRL,
MSDC_DMA_CTRL_STOP, 1);
+ while (readl(host->base + MSDC_DMA_CFG) & MSDC_DMA_CFG_STS)
+ cpu_relax();
msdc_reset_hw(host);
}
}
--
2.18.0
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [PATCH] mmc: mediatek: add wait dma stop done flow
2021-08-06 2:30 [PATCH] mmc: mediatek: add wait dma stop done flow Derong Liu
@ 2021-08-06 10:42 ` Matthias Brugger
0 siblings, 0 replies; 2+ messages in thread
From: Matthias Brugger @ 2021-08-06 10:42 UTC (permalink / raw)
To: Derong Liu, Chaotian Jing, Ulf Hansson
Cc: linux-mmc, linux-arm-kernel, linux-mediatek, linux-kernel,
wsp_upstream, Peng Zhou
Thanks for your patch.
On 06/08/2021 04:30, Derong Liu wrote:
> From: mtk13858 <derong.liu@mediatek.com>
>
> it needs to wait for dma stop done after set dma stop.
>
Please provide a better commit message. Which bug do you see on which SoC? Are
you sure you can apply that to all SoC without breaking stuff?
> Signed-off-by: mtk13858 <derong.liu@mediatek.com>
Full name please.
Regards,
Matthias
> ---
> drivers/mmc/host/mtk-sd.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
> index 4dfc246c5f95..1dfd2842471b 100644
> --- a/drivers/mmc/host/mtk-sd.c
> +++ b/drivers/mmc/host/mtk-sd.c
> @@ -2339,6 +2339,8 @@ static void msdc_cqe_disable(struct mmc_host *mmc, bool recovery)
> if (recovery) {
> sdr_set_field(host->base + MSDC_DMA_CTRL,
> MSDC_DMA_CTRL_STOP, 1);
> + while (readl(host->base + MSDC_DMA_CFG) & MSDC_DMA_CFG_STS)
> + cpu_relax();
> msdc_reset_hw(host);
> }
> }
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2021-08-06 2:30 [PATCH] mmc: mediatek: add wait dma stop done flow Derong Liu
2021-08-06 10:42 ` Matthias Brugger
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