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> -----Original Message-----
> From: linux-arm-msm-owner@xxxxxxxxxxxxxxx [mailto:linux-arm-msm-
> owner@xxxxxxxxxxxxxxx] On Behalf Of Aaron Lu
> Sent: Monday, March 26, 2012 8:47 AM
> To: Subhash Jadavani
> Cc: linux-mmc@xxxxxxxxxxxxxxx; linux-arm-msm@xxxxxxxxxxxxxxx;
> arindam.nath@xxxxxxx
> Subject: Re: [PATCH v1 1/1] mmc: bus: print bus speed mode of UHS-I card
>
> Hi Subhash,
>
> On Fri, Mar 23, 2012 at 11:26:36AM +0530, Subhash Jadavani wrote:
> > When UHS-I card is detected also print the bus speed mode in which
> > UHS-I card will be running.
>
> The patch looks correct to me, except that I' m not sure if this is
needed.
> /sys/kernel/debug/mmc/ios also has such info.
Thanks for pointing it out.
Actually we are already printing the HS200/DDR (for eMMC) bus speed mode
along with card detected print. So why not bus speed mode for UHS-I cards.
It really gives good impression to user what this card is capable of doing
by just looking at this print.
Correct we can this information from /sys/kernel/debug/mmc/ios but this
needs extra effort than just looking at the kernel logs.
Also note that mmc_ios_show() function is currently not updated to print the
UHS-I bus speed modes in user readable format. We need to fix this as well
probably as separate patch.
Regards,
Subhash
>
> -Aaron
>
> >
> > Signed-off-by: Subhash Jadavani <subhashj@xxxxxxxxxxxxxx>
> > ---
> > drivers/mmc/core/bus.c | 26 +++++++++++++++++++++++++-
> > 1 files changed, 25 insertions(+), 1 deletions(-)
> >
> > diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c index
> > 5d011a3..0517a91 100644
> > --- a/drivers/mmc/core/bus.c
> > +++ b/drivers/mmc/core/bus.c
> > @@ -267,6 +267,7 @@ int mmc_add_card(struct mmc_card *card) {
> > int ret;
> > const char *type;
> > + const char *uhs_bus_speed_mode = "";
> >
> > dev_set_name(&card->dev, "%s:%04x", mmc_hostname(card-
> >host),
> > card->rca);
> >
> > @@ -296,6 +297,28 @@ int mmc_add_card(struct mmc_card *card)
> > break;
> > }
> >
> > + if (mmc_sd_card_uhs(card)) {
> > + switch (card->sd_bus_speed) {
> > + case UHS_SDR104_BUS_SPEED:
> > + uhs_bus_speed_mode = "SDR104 ";
> > + break;
> > + case UHS_SDR50_BUS_SPEED:
> > + uhs_bus_speed_mode = "SDR50 ";
> > + break;
> > + case UHS_DDR50_BUS_SPEED:
> > + uhs_bus_speed_mode = "DDR50 ";
> > + break;
> > + case UHS_SDR25_BUS_SPEED:
> > + uhs_bus_speed_mode = "SDR25 ";
> > + break;
> > + case UHS_SDR12_BUS_SPEED:
> > + uhs_bus_speed_mode = "SDR12 ";
> > + break;
> > + default:
> > + uhs_bus_speed_mode = "";
> > + break;
> > + }
> > + }
> > if (mmc_host_is_spi(card->host)) {
> > pr_info("%s: new %s%s%s card on SPI\n",
> > mmc_hostname(card->host),
> > @@ -303,12 +326,13 @@ int mmc_add_card(struct mmc_card *card)
> > mmc_card_ddr_mode(card) ? "DDR " : "",
> > type);
> > } else {
> > - pr_info("%s: new %s%s%s%s card at address %04x\n",
> > + pr_info("%s: new %s%s%s%s%s card at address %04x\n",
> > mmc_hostname(card->host),
> > mmc_card_uhs(card) ? "ultra high speed " :
> > (mmc_card_highspeed(card) ? "high speed " : ""),
> > (mmc_card_hs200(card) ? "HS200 " : ""),
> > mmc_card_ddr_mode(card) ? "DDR " : "",
> > + uhs_bus_speed_mode,
> > type, card->rca);
> > }
> >
> > --
> > 1.7.1.1
> >
> > --
> > Sent by a consultant of the Qualcomm Innovation Center, Inc.
> > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora
> Forum.
> > --
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> >
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