[U-Boot] [U-Boot, BUG] snow: mmc: SD card access broken: unable to select a mode

2018-10-23 Thread Paweł Jarosz 

Hi Guillaume,


Could you test this patch:

https://patchwork.ozlabs.org/patch/986180/

and tell me how it goes?


Cheers

Paweł


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Re: [U-Boot] [U-Boot, BUG] snow: mmc: SD card access broken: unable to select a mode

2018-10-15 Thread Guillaume Gardet 

Hi,

Le 16/05/2018 à 09:22, Guillaume Gardet a écrit :

Hi Jaehoon,


Le 26/04/2018 à 15:15, Guillaume Gardet a écrit :



Le 26/04/2018 à 12:31, Jaehoon Chung a écrit :

Hi,

On 04/09/2018 09:02 PM, Guillaume Gardet wrote:

Hi Jaehoon,

There are problems with SD card access on Samsung Chromebook (snow) with latest 
master (and also 2018.05-rc1 and 2018.03).

eMMC is ok, but SD card access leads to 'unable to select a mode' problem. If I 
disable HS mode, I can access the SD card without problem:



Once we try to select HS mode, all access to SD card result in failure, even 
when trying to setup a lower frequency mode, including SD legacy at 25 MHz.

Any idea what is going? Maybe you have fixes pending?

Sorry for late. Hmm. I will check your issue. Just disable MMC_MODE_HS, then 
it's working fine?
or HS_52MHz?


I tried to disable HS_52MHz only and it did not fix the problem. Then I tried 
to disable both HS and HS_52MHz and it fixed the problem.


Any progress on this problem?



Ping again.
The problem is still there in u-boot v2018.11-rc1.


Guillaume




Guillaume




Guillaume



Best Regards,
Jaehoon Chung



Guillaume

diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c
index 23f642980bf..28f4fa0f213 100644
--- a/drivers/mmc/dw_mmc.c
+++ b/drivers/mmc/dw_mmc.c
@@ -508,7 +508,8 @@ void dwmci_setup_cfg(struct mmc_config *cfg, struct 
dwmci_host *host,
       cfg->host_caps |= MMC_MODE_4BIT;
       cfg->host_caps &= ~MMC_MODE_8BIT;
   }
-    cfg->host_caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz;
+    /* Temp workaround for Chromebook snow to avoid the 'unable to select a 
mode' error */
+//     cfg->host_caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz;

   cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
   }








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Re: [U-Boot] [U-Boot, BUG] snow: mmc: SD card access broken: unable to select a mode

2018-04-26 Thread Jaehoon Chung 
Hi,

On 04/09/2018 09:02 PM, Guillaume Gardet wrote:
> Hi Jaehoon,
> 
> There are problems with SD card access on Samsung Chromebook (snow) with 
> latest master (and also 2018.05-rc1 and 2018.03).
> 
> eMMC is ok, but SD card access leads to 'unable to select a mode' problem. If 
> I disable HS mode, I can access the SD card without problem:
> 
> 
> 
> Once we try to select HS mode, all access to SD card result in failure, even 
> when trying to setup a lower frequency mode, including SD legacy at 25 MHz.
> 
> Any idea what is going? Maybe you have fixes pending?

Sorry for late. Hmm. I will check your issue. Just disable MMC_MODE_HS, then 
it's working fine?
or HS_52MHz?

Best Regards,
Jaehoon Chung

> 
> 
> Guillaume
> 
> diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c
> index 23f642980bf..28f4fa0f213 100644
> --- a/drivers/mmc/dw_mmc.c
> +++ b/drivers/mmc/dw_mmc.c
> @@ -508,7 +508,8 @@ void dwmci_setup_cfg(struct mmc_config *cfg, struct 
> dwmci_host *host,
>       cfg->host_caps |= MMC_MODE_4BIT;
>       cfg->host_caps &= ~MMC_MODE_8BIT;
>   }
> -    cfg->host_caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz;
> +    /* Temp workaround for Chromebook snow to avoid the 'unable to select a 
> mode' error */
> +//     cfg->host_caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz;
> 
>   cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
>   }
> 

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Re: [U-Boot] [U-Boot, BUG] snow: mmc: SD card access broken: unable to select a mode

2018-04-26 Thread Guillaume Gardet 



Le 26/04/2018 à 12:31, Jaehoon Chung a écrit :

Hi,

On 04/09/2018 09:02 PM, Guillaume Gardet wrote:

Hi Jaehoon,

There are problems with SD card access on Samsung Chromebook (snow) with latest 
master (and also 2018.05-rc1 and 2018.03).

eMMC is ok, but SD card access leads to 'unable to select a mode' problem. If I 
disable HS mode, I can access the SD card without problem:



Once we try to select HS mode, all access to SD card result in failure, even 
when trying to setup a lower frequency mode, including SD legacy at 25 MHz.

Any idea what is going? Maybe you have fixes pending?

Sorry for late. Hmm. I will check your issue. Just disable MMC_MODE_HS, then 
it's working fine?
or HS_52MHz?


I tried to disable HS_52MHz only and it did not fix the problem. Then I tried 
to disable both HS and HS_52MHz and it fixed the problem.


Guillaume



Best Regards,
Jaehoon Chung



Guillaume

diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c
index 23f642980bf..28f4fa0f213 100644
--- a/drivers/mmc/dw_mmc.c
+++ b/drivers/mmc/dw_mmc.c
@@ -508,7 +508,8 @@ void dwmci_setup_cfg(struct mmc_config *cfg, struct 
dwmci_host *host,
       cfg->host_caps |= MMC_MODE_4BIT;
       cfg->host_caps &= ~MMC_MODE_8BIT;
   }
-    cfg->host_caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz;
+    /* Temp workaround for Chromebook snow to avoid the 'unable to select a 
mode' error */
+//     cfg->host_caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz;

   cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
   }





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Re: [U-Boot] [U-Boot, BUG] snow: mmc: SD card access broken: unable to select a mode

2018-05-16 Thread Guillaume Gardet 

Hi Jaehoon,


Le 26/04/2018 à 15:15, Guillaume Gardet a écrit :



Le 26/04/2018 à 12:31, Jaehoon Chung a écrit :

Hi,

On 04/09/2018 09:02 PM, Guillaume Gardet wrote:

Hi Jaehoon,

There are problems with SD card access on Samsung Chromebook (snow) with latest 
master (and also 2018.05-rc1 and 2018.03).

eMMC is ok, but SD card access leads to 'unable to select a mode' problem. If I 
disable HS mode, I can access the SD card without problem:



Once we try to select HS mode, all access to SD card result in failure, even 
when trying to setup a lower frequency mode, including SD legacy at 25 MHz.

Any idea what is going? Maybe you have fixes pending?

Sorry for late. Hmm. I will check your issue. Just disable MMC_MODE_HS, then 
it's working fine?
or HS_52MHz?


I tried to disable HS_52MHz only and it did not fix the problem. Then I tried 
to disable both HS and HS_52MHz and it fixed the problem.


Any progress on this problem?

Guillaume




Guillaume



Best Regards,
Jaehoon Chung



Guillaume

diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c
index 23f642980bf..28f4fa0f213 100644
--- a/drivers/mmc/dw_mmc.c
+++ b/drivers/mmc/dw_mmc.c
@@ -508,7 +508,8 @@ void dwmci_setup_cfg(struct mmc_config *cfg, struct 
dwmci_host *host,
       cfg->host_caps |= MMC_MODE_4BIT;
       cfg->host_caps &= ~MMC_MODE_8BIT;
   }
-    cfg->host_caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz;
+    /* Temp workaround for Chromebook snow to avoid the 'unable to select a 
mode' error */
+//     cfg->host_caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz;

   cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
   }







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