| Message ID | 20121031205850.GO12739@atomide.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Tony, On Wednesday 31 October 2012 13:58:50 Tony Lindgren wrote: > * Tony Lindgren <tony@atomide.com> [121030 16:55]: > > This code should be private to mach-omap2. > > > > The only use for it in for omap1 has been in dmtimer.c > > to check for context loss. However, omap1 does not > > lose context during idle, so the code is not needed. > > Further, omap1 timer has OMAP_TIMER_ALWON set, so omap1 > > was not hitting omap_pm_get_dev_context_loss_count() > > test. > > Noticed one issue with my test compiles in the > omap-for-v3.8/cleanup-headers branch that can be > fixed along with this patch. > > --- a/drivers/media/platform/omap3isp/ispvideo.c > +++ b/drivers/media/platform/omap3isp/ispvideo.c > @@ -36,7 +36,6 @@ > #include <media/v4l2-ioctl.h> > #include <plat/iommu.h> > #include <plat/iovmm.h> > -#include <plat/omap-pm.h> The reason this was included was to call omap_pm_set_min_bus_tput() in earlier versions of the driver. We'll have to discuss what to replace that with, but that's another topic. > #include "ispvideo.h" > #include "isp.h" > > I'll fold that into this patch. > > Regards, > > Tony > > > Cc: Jon Hunter <jon-hunter@ti.com> > > Cc: Kevin Hilman <khilman@deeprootsystems.com> > > Signed-off-by: Tony Lindgren <tony@atomide.com> > > --- > > > > arch/arm/mach-omap2/Makefile | 1 + > > arch/arm/mach-omap2/omap-pm-noop.c | 4 ++-- > > arch/arm/mach-omap2/timer.c | 2 ++ > > arch/arm/plat-omap/Makefile | 1 - > > arch/arm/plat-omap/dmtimer.c | 17 ++++++++++------- > > arch/arm/plat-omap/include/plat/dmtimer.h | 2 ++ > > 6 files changed, 17 insertions(+), 10 deletions(-) > > rename arch/arm/{plat-omap/omap-pm-noop.c => mach-omap2/omap-pm-noop.c} > > (99%)> > > diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile > > index e3de5d4..b118ed5 100644 > > --- a/arch/arm/mach-omap2/Makefile > > +++ b/arch/arm/mach-omap2/Makefile > > @@ -70,6 +70,7 @@ obj-$(CONFIG_ARCH_OMAP4) += pm44xx.o > > omap-mpuss-lowpower.o> > > obj-$(CONFIG_ARCH_OMAP4) += sleep44xx.o > > obj-$(CONFIG_SOC_OMAP5) += omap-mpuss-lowpower.o sleep44xx.o > > obj-$(CONFIG_PM_DEBUG) += pm-debug.o > > > > +obj-$(CONFIG_OMAP_PM_NOOP) += omap-pm-noop.o > > > > obj-$(CONFIG_POWER_AVS_OMAP) += sr_device.o > > obj-$(CONFIG_POWER_AVS_OMAP_CLASS3) += smartreflex-class3.o > > > > diff --git a/arch/arm/plat-omap/omap-pm-noop.c > > b/arch/arm/mach-omap2/omap-pm-noop.c similarity index 99% > > rename from arch/arm/plat-omap/omap-pm-noop.c > > rename to arch/arm/mach-omap2/omap-pm-noop.c > > index 198685b..6a3be2b 100644 > > --- a/arch/arm/plat-omap/omap-pm-noop.c > > +++ b/arch/arm/mach-omap2/omap-pm-noop.c > > @@ -22,8 +22,8 @@ > > > > #include <linux/device.h> > > #include <linux/platform_device.h> > > > > -#include "../mach-omap2/omap_device.h" > > -#include "../mach-omap2/omap-pm.h" > > +#include "omap_device.h" > > +#include "omap-pm.h" > > > > static bool off_mode_enabled; > > static int dummy_context_loss_counter; > > > > diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c > > index 565e575..95e4478 100644 > > --- a/arch/arm/mach-omap2/timer.c > > +++ b/arch/arm/mach-omap2/timer.c > > @@ -559,6 +559,8 @@ static int __init omap_timer_init(struct omap_hwmod > > *oh, void *unused)> > > if (timer_dev_attr) > > > > pdata->timer_capability = timer_dev_attr->timer_capability; > > > > + pdata->get_context_loss_count = omap_pm_get_dev_context_loss_count; > > + > > > > pdev = omap_device_build(name, id, oh, pdata, sizeof(*pdata), > > > > NULL, 0, 0); > > > > diff --git a/arch/arm/plat-omap/Makefile b/arch/arm/plat-omap/Makefile > > index 4bd0ace..50da9bf 100644 > > --- a/arch/arm/plat-omap/Makefile > > +++ b/arch/arm/plat-omap/Makefile > > @@ -19,4 +19,3 @@ obj-y += $(i2c-omap-m) $(i2c-omap-y) > > > > # OMAP mailbox framework > > obj-$(CONFIG_OMAP_MBOX_FWK) += mailbox.o > > > > -obj-$(CONFIG_OMAP_PM_NOOP) += omap-pm-noop.o > > diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c > > index 4a0b30a..9a0bbc4 100644 > > --- a/arch/arm/plat-omap/dmtimer.c > > +++ b/arch/arm/plat-omap/dmtimer.c > > @@ -45,8 +45,6 @@ > > > > #include <mach/hardware.h> > > > > -#include "../mach-omap2/omap-pm.h" > > - > > > > static u32 omap_reserved_systimers; > > static LIST_HEAD(omap_timer_list); > > static DEFINE_SPINLOCK(dm_timer_lock); > > > > @@ -349,7 +347,8 @@ int omap_dm_timer_start(struct omap_dm_timer *timer) > > > > omap_dm_timer_enable(timer); > > > > if (!(timer->capability & OMAP_TIMER_ALWON)) { > > > > - if (omap_pm_get_dev_context_loss_count(&timer->pdev->dev) != > > + if (timer->get_context_loss_count && > > + timer->get_context_loss_count(&timer->pdev->dev) != > > > > timer->ctx_loss_count) > > > > omap_timer_restore_context(timer); > > > > } > > > > @@ -378,9 +377,11 @@ int omap_dm_timer_stop(struct omap_dm_timer *timer) > > > > __omap_dm_timer_stop(timer, timer->posted, rate); > > > > - if (!(timer->capability & OMAP_TIMER_ALWON)) > > - timer->ctx_loss_count = > > - omap_pm_get_dev_context_loss_count(&timer->pdev->dev); > > + if (!(timer->capability & OMAP_TIMER_ALWON)) { > > + if (timer->get_context_loss_count) > > + timer->ctx_loss_count = > > + timer->get_context_loss_count(&timer->pdev->dev); > > + } > > > > /* > > > > * Since the register values are computed and written within > > > > @@ -496,7 +497,8 @@ int omap_dm_timer_set_load_start(struct omap_dm_timer > > *timer, int autoreload,> > > omap_dm_timer_enable(timer); > > > > if (!(timer->capability & OMAP_TIMER_ALWON)) { > > > > - if (omap_pm_get_dev_context_loss_count(&timer->pdev->dev) != > > + if (timer->get_context_loss_count && > > + timer->get_context_loss_count(&timer->pdev->dev) != > > > > timer->ctx_loss_count) > > > > omap_timer_restore_context(timer); > > > > } > > > > @@ -730,6 +732,7 @@ static int __devinit omap_dm_timer_probe(struct > > platform_device *pdev)> > > timer->reserved = omap_dm_timer_reserved_systimer(timer->id); > > timer->pdev = pdev; > > timer->capability = pdata->timer_capability; > > > > + timer->get_context_loss_count = pdata->get_context_loss_count; > > > > /* Skip pm_runtime_enable for OMAP1 */ > > if (!(timer->capability & OMAP_TIMER_NEEDS_RESET)) { > > > > diff --git a/arch/arm/plat-omap/include/plat/dmtimer.h > > b/arch/arm/plat-omap/include/plat/dmtimer.h index 85868e9..3f5b9cf 100644 > > --- a/arch/arm/plat-omap/include/plat/dmtimer.h > > +++ b/arch/arm/plat-omap/include/plat/dmtimer.h > > @@ -94,6 +94,7 @@ struct dmtimer_platform_data { > > > > /* set_timer_src - Only used for OMAP1 devices */ > > int (*set_timer_src)(struct platform_device *pdev, int source); > > u32 timer_capability; > > > > + int (*get_context_loss_count)(struct device *); That's a step forward for the common zImage, but one step backward for DT support :-) I'm fine with this for now, but do you already have an idea on how to solve that ? > > }; > > > > int omap_dm_timer_reserve_systimer(int id); > > > > @@ -263,6 +264,7 @@ struct omap_dm_timer { > > > > unsigned reserved:1; > > unsigned posted:1; > > struct timer_regs context; > > > > + int (*get_context_loss_count)(struct device *); > > > > int ctx_loss_count; > > int revision; > > u32 capability; > >
* Laurent Pinchart <laurent.pinchart@ideasonboard.com> [121031 16:03]: > Hi Tony, > > On Wednesday 31 October 2012 13:58:50 Tony Lindgren wrote: > > * Tony Lindgren <tony@atomide.com> [121030 16:55]: > > > This code should be private to mach-omap2. > > > > > > The only use for it in for omap1 has been in dmtimer.c > > > to check for context loss. However, omap1 does not > > > lose context during idle, so the code is not needed. > > > Further, omap1 timer has OMAP_TIMER_ALWON set, so omap1 > > > was not hitting omap_pm_get_dev_context_loss_count() > > > test. > > > > Noticed one issue with my test compiles in the > > omap-for-v3.8/cleanup-headers branch that can be > > fixed along with this patch. > > > > --- a/drivers/media/platform/omap3isp/ispvideo.c > > +++ b/drivers/media/platform/omap3isp/ispvideo.c > > @@ -36,7 +36,6 @@ > > #include <media/v4l2-ioctl.h> > > #include <plat/iommu.h> > > #include <plat/iovmm.h> > > -#include <plat/omap-pm.h> > > The reason this was included was to call omap_pm_set_min_bus_tput() in earlier > versions of the driver. We'll have to discuss what to replace that with, but > that's another topic. OK thanks. > > > @@ -730,6 +732,7 @@ static int __devinit omap_dm_timer_probe(struct > > > platform_device *pdev)> > > > timer->reserved = omap_dm_timer_reserved_systimer(timer->id); > > > timer->pdev = pdev; > > > timer->capability = pdata->timer_capability; > > > > > > + timer->get_context_loss_count = pdata->get_context_loss_count; > > > > > > /* Skip pm_runtime_enable for OMAP1 */ > > > if (!(timer->capability & OMAP_TIMER_NEEDS_RESET)) { > > > > > > diff --git a/arch/arm/plat-omap/include/plat/dmtimer.h > > > b/arch/arm/plat-omap/include/plat/dmtimer.h index 85868e9..3f5b9cf 100644 > > > --- a/arch/arm/plat-omap/include/plat/dmtimer.h > > > +++ b/arch/arm/plat-omap/include/plat/dmtimer.h > > > @@ -94,6 +94,7 @@ struct dmtimer_platform_data { > > > > > > /* set_timer_src - Only used for OMAP1 devices */ > > > int (*set_timer_src)(struct platform_device *pdev, int source); > > > u32 timer_capability; > > > > > > + int (*get_context_loss_count)(struct device *); > > That's a step forward for the common zImage, but one step backward for DT > support :-) I'm fine with this for now, but do you already have an idea on how > to solve that ? When it's converted to be a device driver, it can do it using runtime PM calls. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 10/31/2012 06:11 PM, Tony Lindgren wrote: > * Laurent Pinchart <laurent.pinchart@ideasonboard.com> [121031 16:03]: >> Hi Tony, >> >> On Wednesday 31 October 2012 13:58:50 Tony Lindgren wrote: >>> * Tony Lindgren <tony@atomide.com> [121030 16:55]: >>>> This code should be private to mach-omap2. >>>> >>>> The only use for it in for omap1 has been in dmtimer.c >>>> to check for context loss. However, omap1 does not >>>> lose context during idle, so the code is not needed. >>>> Further, omap1 timer has OMAP_TIMER_ALWON set, so omap1 >>>> was not hitting omap_pm_get_dev_context_loss_count() >>>> test. >>> >>> Noticed one issue with my test compiles in the >>> omap-for-v3.8/cleanup-headers branch that can be >>> fixed along with this patch. >>> >>> --- a/drivers/media/platform/omap3isp/ispvideo.c >>> +++ b/drivers/media/platform/omap3isp/ispvideo.c >>> @@ -36,7 +36,6 @@ >>> #include <media/v4l2-ioctl.h> >>> #include <plat/iommu.h> >>> #include <plat/iovmm.h> >>> -#include <plat/omap-pm.h> >> >> The reason this was included was to call omap_pm_set_min_bus_tput() in earlier >> versions of the driver. We'll have to discuss what to replace that with, but >> that's another topic. > > OK thanks. > >>>> @@ -730,6 +732,7 @@ static int __devinit omap_dm_timer_probe(struct >>>> platform_device *pdev)> >>>> timer->reserved = omap_dm_timer_reserved_systimer(timer->id); >>>> timer->pdev = pdev; >>>> timer->capability = pdata->timer_capability; >>>> >>>> + timer->get_context_loss_count = pdata->get_context_loss_count; >>>> >>>> /* Skip pm_runtime_enable for OMAP1 */ >>>> if (!(timer->capability & OMAP_TIMER_NEEDS_RESET)) { >>>> >>>> diff --git a/arch/arm/plat-omap/include/plat/dmtimer.h >>>> b/arch/arm/plat-omap/include/plat/dmtimer.h index 85868e9..3f5b9cf 100644 >>>> --- a/arch/arm/plat-omap/include/plat/dmtimer.h >>>> +++ b/arch/arm/plat-omap/include/plat/dmtimer.h >>>> @@ -94,6 +94,7 @@ struct dmtimer_platform_data { >>>> >>>> /* set_timer_src - Only used for OMAP1 devices */ >>>> int (*set_timer_src)(struct platform_device *pdev, int source); >>>> u32 timer_capability; >>>> >>>> + int (*get_context_loss_count)(struct device *); >> >> That's a step forward for the common zImage, but one step backward for DT >> support :-) I'm fine with this for now, but do you already have an idea on how >> to solve that ? > > When it's converted to be a device driver, it can do it > using runtime PM calls. I am not sure if you are referring to runtime pm callbacks here, but if so I am not sure I follow. Drivers such as dmtimer and gpio that are using runtime pm are still dependent on OMAP specific APIs (such as omap_pm_get_dev_context_loss_count()) for determining if the context was lost between suspending and resuming the device. So I am not sure how runtime pm solves this. Speaking with Rob Herring, one solution for DT would be using bus notifiers to populate such function pointers when a device is added. Given that there are a few devices using this architecture specific API for context loss I am wondering if we can do something generic in omap_device.c for DT. Cheers Jon -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
* Jon Hunter <jon-hunter@ti.com> [121107 14:06]: > On 10/31/2012 06:11 PM, Tony Lindgren wrote: > > > > When it's converted to be a device driver, it can do it > > using runtime PM calls. > > I am not sure if you are referring to runtime pm callbacks here, but if > so I am not sure I follow. Drivers such as dmtimer and gpio that are > using runtime pm are still dependent on OMAP specific APIs (such as > omap_pm_get_dev_context_loss_count()) for determining if the context was > lost between suspending and resuming the device. So I am not sure how > runtime pm solves this. Ah right. > Speaking with Rob Herring, one solution for DT would be using bus > notifiers to populate such function pointers when a device is added. > Given that there are a few devices using this architecture specific API > for context loss I am wondering if we can do something generic in > omap_device.c for DT. Sounds good to me. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
--- a/drivers/media/platform/omap3isp/ispvideo.c +++ b/drivers/media/platform/omap3isp/ispvideo.c @@ -36,7 +36,6 @@ #include <media/v4l2-ioctl.h> #include <plat/iommu.h> #include <plat/iovmm.h> -#include <plat/omap-pm.h> #include "ispvideo.h" #include "isp.h"