Re: [linux-sunxi] [PATCH 3/3] mmc: sunxi: use controller automatic clock gating.
The thing is, I never saw the prints in my console (i assume that it prints on the console by default with earlyprintk/debug stuff enabled as per sunxi-usual)? P.S. what I do as a basic test, is on our very very minimal empty debian image (think < 150 mb) i do a apt-get build-essential that installs about 150mb worth of packages. Without these patches, everything works as before. All packages successfully installed. I can do more intense testing later, but I figured that this is pretty intense. Olliver On 12-08-15 15:37, Michal Suchanek wrote: On 12 August 2015 at 15:19, Olliver Schinagl wrote: Hey, On 12-08-15 14:35, Hans de Goede wrote: Hi, On 12-08-15 14:23, Michal Suchanek wrote: When core does not set the MMC_QUIRK_BROKEN_CLK_GATING flag enable automatic hardware controlled clock gating on the mmc interface. Signed-off-by: Michal Suchanek In general this looks good, but I wonder how intensively this has been tested ? It doesn't matter actually, it took some time longer, but the mmc still craps out even with Michal's 3 patches. I'll revert hans's earlier patch again and do a bit more extensive testing. Does the oclk switch timeout even after 750ms? In some earlier tests I tried to enable/disable the clock repeatedly when it failed but it seemed to have little effect on the total time it took to disable the clock in the end. Maybe it would be worh trying to set the timeout to some insanely long value and test stability with that. I picked 750 as around twice the maximum time it ever took on my board. Thanks Michal -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [linux-sunxi] [PATCH 3/3] mmc: sunxi: use controller automatic clock gating.
On 12 August 2015 at 15:19, Olliver Schinagl wrote: > Hey, > > On 12-08-15 14:35, Hans de Goede wrote: >> >> Hi, >> >> On 12-08-15 14:23, Michal Suchanek wrote: >>> >>> When core does not set the MMC_QUIRK_BROKEN_CLK_GATING flag enable >>> automatic hardware controlled clock gating on the mmc interface. >>> >>> Signed-off-by: Michal Suchanek >> >> >> In general this looks good, but I wonder how intensively this has >> been tested ? > > It doesn't matter actually, it took some time longer, but the mmc still > craps out even with Michal's 3 patches. I'll revert hans's earlier patch > again and do a bit more extensive testing. Does the oclk switch timeout even after 750ms? In some earlier tests I tried to enable/disable the clock repeatedly when it failed but it seemed to have little effect on the total time it took to disable the clock in the end. Maybe it would be worh trying to set the timeout to some insanely long value and test stability with that. I picked 750 as around twice the maximum time it ever took on my board. Thanks Michal -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [linux-sunxi] [PATCH 3/3] mmc: sunxi: use controller automatic clock gating.
Hey,
On 12-08-15 14:35, Hans de Goede wrote:
Hi,
On 12-08-15 14:23, Michal Suchanek wrote:
When core does not set the MMC_QUIRK_BROKEN_CLK_GATING flag enable
automatic hardware controlled clock gating on the mmc interface.
Signed-off-by: Michal Suchanek
In general this looks good, but I wonder how intensively this has
been tested ?
It doesn't matter actually, it took some time longer, but the mmc still
craps out even with Michal's 3 patches. I'll revert hans's earlier patch
again and do a bit more extensive testing.
Also given the long latencies when using manual
clock on/off support, have you done any testing to check what
sort of latencies this adds, e.g. Both with and without
the patch, dump all the filesystem caches:
echo 3 > /proc/sys/vm/drop_caches
And then do:
time cat /some/small/file/on/the/sdcard
Do this at least 3 time both with and without the patch, and see
if there are any noticable differences ?
Regards,
Hans
---
drivers/mmc/host/sunxi-mmc.c | 7 ++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c
index f808a02..443cab5 100644
--- a/drivers/mmc/host/sunxi-mmc.c
+++ b/drivers/mmc/host/sunxi-mmc.c
@@ -601,8 +601,13 @@ static int sunxi_mmc_oclk_onoff(struct
sunxi_mmc_host *host, u32 oclk_en)
rval = mmc_readl(host, REG_CLKCR);
rval &= ~(SDXC_CARD_CLOCK_ON | SDXC_LOW_POWER_ON);
-if (oclk_en)
+if (oclk_en) {
rval |= SDXC_CARD_CLOCK_ON;
+if (!host->mmc->card ||
+ !(host->mmc->card->quirks & MMC_QUIRK_BROKEN_CLK_GATING))
+
+rval |= SDXC_LOW_POWER_ON;
+}
start = jiffies;
end = start + msecs_to_jiffies(750);
--
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the body of a message to majord...@vger.kernel.org
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Please read the FAQ at http://www.tux.org/lkml/
Re: [linux-sunxi] [PATCH 3/3] mmc: sunxi: use controller automatic clock gating.
On 12 August 2015 at 14:35, Hans de Goede wrote: > Hi, > > On 12-08-15 14:23, Michal Suchanek wrote: >> >> When core does not set the MMC_QUIRK_BROKEN_CLK_GATING flag enable >> automatic hardware controlled clock gating on the mmc interface. >> >> Signed-off-by: Michal Suchanek > > > In general this looks good, but I wonder how intensively this has > been tested ? Unlike the wrong timeout it does not cause the boards to crash frequently ;-) It would be nice if somebody actively using some board atm tested this. > Also given the long latencies when using manual > clock on/off support, have you done any testing to check what I suspect the long latency is due to the controller flushing data to the card or something like that since it happens only under load. > sort of latencies this adds, e.g. Both with and without > the patch, dump all the filesystem caches: > > echo 3 > /proc/sys/vm/drop_caches > > And then do: > > time cat /some/small/file/on/the/sdcard > > Do this at least 3 time both with and without the patch, and see > if there are any noticable differences ? Yes, it would be good idea to test. Thanks Michal -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [linux-sunxi] [PATCH 3/3] mmc: sunxi: use controller automatic clock gating.
Hi,
On 12-08-15 14:23, Michal Suchanek wrote:
When core does not set the MMC_QUIRK_BROKEN_CLK_GATING flag enable
automatic hardware controlled clock gating on the mmc interface.
Signed-off-by: Michal Suchanek
In general this looks good, but I wonder how intensively this has
been tested ? Also given the long latencies when using manual
clock on/off support, have you done any testing to check what
sort of latencies this adds, e.g. Both with and without
the patch, dump all the filesystem caches:
echo 3 > /proc/sys/vm/drop_caches
And then do:
time cat /some/small/file/on/the/sdcard
Do this at least 3 time both with and without the patch, and see
if there are any noticable differences ?
Regards,
Hans
---
drivers/mmc/host/sunxi-mmc.c | 7 ++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c
index f808a02..443cab5 100644
--- a/drivers/mmc/host/sunxi-mmc.c
+++ b/drivers/mmc/host/sunxi-mmc.c
@@ -601,8 +601,13 @@ static int sunxi_mmc_oclk_onoff(struct sunxi_mmc_host
*host, u32 oclk_en)
rval = mmc_readl(host, REG_CLKCR);
rval &= ~(SDXC_CARD_CLOCK_ON | SDXC_LOW_POWER_ON);
- if (oclk_en)
+ if (oclk_en) {
rval |= SDXC_CARD_CLOCK_ON;
+ if (!host->mmc->card ||
+!(host->mmc->card->quirks & MMC_QUIRK_BROKEN_CLK_GATING))
+
+ rval |= SDXC_LOW_POWER_ON;
+ }
start = jiffies;
end = start + msecs_to_jiffies(750);
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: [linux-sunxi] [PATCH 3/3] mmc: sunxi: use controller automatic clock gating.
The thing is, I never saw the prints in my console (i assume that it prints on the console by default with earlyprintk/debug stuff enabled as per sunxi-usual)? P.S. what I do as a basic test, is on our very very minimal empty debian image (think 150 mb) i do a apt-get build-essential that installs about 150mb worth of packages. Without these patches, everything works as before. All packages successfully installed. I can do more intense testing later, but I figured that this is pretty intense. Olliver On 12-08-15 15:37, Michal Suchanek wrote: On 12 August 2015 at 15:19, Olliver Schinagl oliver+l...@schinagl.nl wrote: Hey, On 12-08-15 14:35, Hans de Goede wrote: Hi, On 12-08-15 14:23, Michal Suchanek wrote: When core does not set the MMC_QUIRK_BROKEN_CLK_GATING flag enable automatic hardware controlled clock gating on the mmc interface. Signed-off-by: Michal Suchanek hramr...@gmail.com In general this looks good, but I wonder how intensively this has been tested ? It doesn't matter actually, it took some time longer, but the mmc still craps out even with Michal's 3 patches. I'll revert hans's earlier patch again and do a bit more extensive testing. Does the oclk switch timeout even after 750ms? In some earlier tests I tried to enable/disable the clock repeatedly when it failed but it seemed to have little effect on the total time it took to disable the clock in the end. Maybe it would be worh trying to set the timeout to some insanely long value and test stability with that. I picked 750 as around twice the maximum time it ever took on my board. Thanks Michal -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [linux-sunxi] [PATCH 3/3] mmc: sunxi: use controller automatic clock gating.
Hi,
On 12-08-15 14:23, Michal Suchanek wrote:
When core does not set the MMC_QUIRK_BROKEN_CLK_GATING flag enable
automatic hardware controlled clock gating on the mmc interface.
Signed-off-by: Michal Suchanek hramr...@gmail.com
In general this looks good, but I wonder how intensively this has
been tested ? Also given the long latencies when using manual
clock on/off support, have you done any testing to check what
sort of latencies this adds, e.g. Both with and without
the patch, dump all the filesystem caches:
echo 3 /proc/sys/vm/drop_caches
And then do:
time cat /some/small/file/on/the/sdcard
Do this at least 3 time both with and without the patch, and see
if there are any noticable differences ?
Regards,
Hans
---
drivers/mmc/host/sunxi-mmc.c | 7 ++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c
index f808a02..443cab5 100644
--- a/drivers/mmc/host/sunxi-mmc.c
+++ b/drivers/mmc/host/sunxi-mmc.c
@@ -601,8 +601,13 @@ static int sunxi_mmc_oclk_onoff(struct sunxi_mmc_host
*host, u32 oclk_en)
rval = mmc_readl(host, REG_CLKCR);
rval = ~(SDXC_CARD_CLOCK_ON | SDXC_LOW_POWER_ON);
- if (oclk_en)
+ if (oclk_en) {
rval |= SDXC_CARD_CLOCK_ON;
+ if (!host-mmc-card ||
+!(host-mmc-card-quirks MMC_QUIRK_BROKEN_CLK_GATING))
+
+ rval |= SDXC_LOW_POWER_ON;
+ }
start = jiffies;
end = start + msecs_to_jiffies(750);
--
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: [linux-sunxi] [PATCH 3/3] mmc: sunxi: use controller automatic clock gating.
On 12 August 2015 at 14:35, Hans de Goede hdego...@redhat.com wrote: Hi, On 12-08-15 14:23, Michal Suchanek wrote: When core does not set the MMC_QUIRK_BROKEN_CLK_GATING flag enable automatic hardware controlled clock gating on the mmc interface. Signed-off-by: Michal Suchanek hramr...@gmail.com In general this looks good, but I wonder how intensively this has been tested ? Unlike the wrong timeout it does not cause the boards to crash frequently ;-) It would be nice if somebody actively using some board atm tested this. Also given the long latencies when using manual clock on/off support, have you done any testing to check what I suspect the long latency is due to the controller flushing data to the card or something like that since it happens only under load. sort of latencies this adds, e.g. Both with and without the patch, dump all the filesystem caches: echo 3 /proc/sys/vm/drop_caches And then do: time cat /some/small/file/on/the/sdcard Do this at least 3 time both with and without the patch, and see if there are any noticable differences ? Yes, it would be good idea to test. Thanks Michal -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [linux-sunxi] [PATCH 3/3] mmc: sunxi: use controller automatic clock gating.
Hey,
On 12-08-15 14:35, Hans de Goede wrote:
Hi,
On 12-08-15 14:23, Michal Suchanek wrote:
When core does not set the MMC_QUIRK_BROKEN_CLK_GATING flag enable
automatic hardware controlled clock gating on the mmc interface.
Signed-off-by: Michal Suchanek hramr...@gmail.com
In general this looks good, but I wonder how intensively this has
been tested ?
It doesn't matter actually, it took some time longer, but the mmc still
craps out even with Michal's 3 patches. I'll revert hans's earlier patch
again and do a bit more extensive testing.
Also given the long latencies when using manual
clock on/off support, have you done any testing to check what
sort of latencies this adds, e.g. Both with and without
the patch, dump all the filesystem caches:
echo 3 /proc/sys/vm/drop_caches
And then do:
time cat /some/small/file/on/the/sdcard
Do this at least 3 time both with and without the patch, and see
if there are any noticable differences ?
Regards,
Hans
---
drivers/mmc/host/sunxi-mmc.c | 7 ++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c
index f808a02..443cab5 100644
--- a/drivers/mmc/host/sunxi-mmc.c
+++ b/drivers/mmc/host/sunxi-mmc.c
@@ -601,8 +601,13 @@ static int sunxi_mmc_oclk_onoff(struct
sunxi_mmc_host *host, u32 oclk_en)
rval = mmc_readl(host, REG_CLKCR);
rval = ~(SDXC_CARD_CLOCK_ON | SDXC_LOW_POWER_ON);
-if (oclk_en)
+if (oclk_en) {
rval |= SDXC_CARD_CLOCK_ON;
+if (!host-mmc-card ||
+ !(host-mmc-card-quirks MMC_QUIRK_BROKEN_CLK_GATING))
+
+rval |= SDXC_LOW_POWER_ON;
+}
start = jiffies;
end = start + msecs_to_jiffies(750);
--
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: [linux-sunxi] [PATCH 3/3] mmc: sunxi: use controller automatic clock gating.
On 12 August 2015 at 15:19, Olliver Schinagl oliver+l...@schinagl.nl wrote: Hey, On 12-08-15 14:35, Hans de Goede wrote: Hi, On 12-08-15 14:23, Michal Suchanek wrote: When core does not set the MMC_QUIRK_BROKEN_CLK_GATING flag enable automatic hardware controlled clock gating on the mmc interface. Signed-off-by: Michal Suchanek hramr...@gmail.com In general this looks good, but I wonder how intensively this has been tested ? It doesn't matter actually, it took some time longer, but the mmc still craps out even with Michal's 3 patches. I'll revert hans's earlier patch again and do a bit more extensive testing. Does the oclk switch timeout even after 750ms? In some earlier tests I tried to enable/disable the clock repeatedly when it failed but it seemed to have little effect on the total time it took to disable the clock in the end. Maybe it would be worh trying to set the timeout to some insanely long value and test stability with that. I picked 750 as around twice the maximum time it ever took on my board. Thanks Michal -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
