Subject: Re: [PATCH] Revert "mmc: dw_mmc-rockchip: add runtime PM support"
To: Randy Li <randy.li@rock-chips.com>, ayaka <ayaka@soulik.info>,
        Jaehoon Chung <jh80.chung@gmail.com>,
        Shawn Lin <shawn.lin@rock-chips.com>, linux-mmc@vger.kernel.org
Cc: ulf.hansson@linaro.org, heiko@sntech.de, linux-kernel@vger.kernel.org,
        linux-rockchip@lists.infradead.org,
        linux-arm-kernel@lists.infradead.org, xzy.xu@rock-chips.com
From: Jaehoon Chung <jh80.chung@samsung.com>
Message-id: <c8307da1-8e43-29b5-c87d-292a56831c98@samsung.com>
Date: Fri, 30 Dec 2016 11:50:04 +0900
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On 12/30/2016 11:44 AM, Randy Li wrote:
> 
> 
> On 12/30/2016 10:35 AM, Jaehoon Chung wrote:
>> On 12/30/2016 12:07 AM, ayaka wrote:
>>>
>>>
>>> On 12/29/2016 10:04 PM, Jaehoon Chung wrote:
>>>> Hi,
>>>>
>>>> On 12/29/2016 09:55 PM, ayaka wrote:
>>>>> [    5.849733] rk_gmac-dwmac ff290000.ethernet (unnamed net_device) (uninitialized): Enable RX Mitigation via HW Watchdog Timer
>>>>> [    5.944512] mmc_host mmc1: Bus speed (slot 0) = 50000000Hz (slot req 50000000Hz, actual 50000000HZ div = 0)
>>>>> [    5.958249] mmc1: new ultra high speed DDR50 SDIO card at address 0001
>>>>> [    6.294548] dwmmc_rockchip ff0f0000.dwmmc: Successfully tuned phase to 177
>>>>> [    6.301591] mmc2: new HS200 MMC card at address 0001
>>>>> [    6.306758] mmc_host mmc0: Bus speed (slot 0) = 300000Hz (slot req 300000Hz, actual 300000HZ div = 0)
>>>>> [    6.316830] mmcblk2: mmc2:0001 AGND3R 14.6 GiB
>>>>> [    6.321881] mmcblk2boot0: mmc2:0001 AGND3R partition 1 4.00 MiB
>>>>> [    6.328331] mmcblk2boot1: mmc2:0001 AGND3R partition 2 4.00 MiB
>>>>> [    6.334792] mmcblk2rpmb: mmc2:0001 AGND3R partition 3 4.00 MiB
>>>>> [    6.344295]  mmcblk2: p1 p2 p3 p4 p5 p6 p7
>>>>> [    6.469892] mmc_host mmc0: Bus speed (slot 0) = 200000Hz (slot req 200000Hz, actual 200000HZ div = 0)
>>>>> [    6.621888] mmc_host mmc0: Bus speed (slot 0) = 187500Hz (slot req 100000Hz, actual 93750HZ div = 1)
>>>>> [    6.917883] libphy: stmmac: probed
>>>>> [    6.921319] rk_gmac-dwmac ff290000.ethernet eth0: PHY ID 001cc915 at 0 IRQ POLL (stmmac-0:00) active
>>>>> [    6.930476] rk_gmac-dwmac ff290000.ethernet eth0: PHY ID 001cc915 at 2 IRQ POLL (stmmac-0:02)
>>>>> [    6.939757] input: gpio-keys as /devices/platform/gpio-keys/input/input0
>>>>> [    6.946937] rtc-hym8563 0-0051: no valid clock/calendar values available
>>>>> [    6.953694] rtc-hym8563 0-0051: hctosys: unable to read the hardware clock
>>>>> [    6.961262] vcc_sd: disabling
>>>>> [    6.964275] dovdd_1v8: disabling
>>>>> [    6.967527] dvdd_1v2: disabling
>>>>> [    6.971006] vdd10_lcd: disabling
>>>>> [    6.974701] vcc18_lcd: disabling
>>>>> [    6.978467] ttyS2 - failed to request DMA
>>>>> [    7.101883] mmc_host mmc0: Bus speed (slot 0) = 400000Hz (slot req 400000Hz, actual 400000HZ div = 0)
>>>>> [    7.253874] mmc_host mmc0: Bus speed (slot 0) = 300000Hz (slot req 300000Hz, actual 300000HZ div = 0)
>>>>> [    7.405883] mmc_host mmc0: Bus speed (slot 0) = 200000Hz (slot req 200000Hz, actual 200000HZ div = 0)
>>>>> [    7.557885] mmc_host mmc0: Bus speed (slot 0) = 187500Hz (slot req 100000Hz, actual 93750HZ div = 1)
>>>>> [    8.037872] mmc_host mmc0: Bus speed (slot 0) = 400000Hz (slot req 400000Hz, actual 400000HZ div = 0)
>>>>> [    8.189877] mmc_host mmc0: Bus speed (slot 0) = 300000Hz (slot req 300000Hz, actual 300000HZ div = 0)
>>>>> [    8.341881] mmc_host mmc0: Bus speed (slot 0) = 200000Hz (slot req 200000Hz, actual 200000HZ div = 0)
>>>>> [    8.493884] mmc_host mmc0: Bus speed (slot 0) = 187500Hz (slot req 100000Hz, actual 93750HZ div = 1)
>>>>> [    8.973871] mmc_host mmc0: Bus speed (slot 0) = 400000Hz (slot req 400000Hz, actual 400000HZ div = 0)
>>>>> [    9.125876] mmc_host mmc0: Bus speed (slot 0) = 300000Hz (slot req 300000Hz, actual 300000HZ div = 0)
>>>>> [    9.277884] mmc_host mmc0: Bus speed (slot 0) = 200000Hz (slot req 200000Hz, actual 200000HZ div = 0)
>>>>> [    9.429882] mmc_host mmc0: Bus speed (slot 0) = 187500Hz (slot req 100000Hz, actual 93750HZ div = 1)
>>>>>
>>>>> looping here
>>>>>
>>>>> If I revert that patch, there are still lots of Bus speed messages, but finally would enter into system.
>>>>>
>>>> Plz..Don't put the comment on the top.
>>>>
>>>> Which kernel did you use?
>>> Add linux-next specific files for 20161224
>>
>> mmc0 is what card? Is it polling for detecting card?
>> (It seems the SD-card..right?)
> Yes, but the Firefly release won't show that, just stop at "ttyS2 - failed to request DMA". I check both the firefly reload and firefly release, they both have a cd line for them, so it won't be poll mode.

I don't have Rockchip board, so I hope that Shawn will check it.
But i will check the displayed the log message.

Best Regards,
Jaehoon Chung

>> Those logs should be polled for detecting mmc0 card..Hmm..I sent the patch for disabling log message when polling.
>> If this log is displayed, then my patch might be some wrong.. :(
>>
>> Best Regards,
>> Jaehoon Chung
>>
>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>
>> [snip]
>>
>>>
>>>
>>>
>>>
>>
>>
>