From: viresh kumar <viresh.kumar@st.com> To: Russell King - ARM Linux <linux@arm.linux.org.uk> Cc: "linus.walleij@linaro.org" <linus.walleij@linaro.org>, Pratyush ANAND <pratyush.anand@st.com>, Rajeev KUMAR <rajeev-dlh.kumar@st.com>, Bhupesh SHARMA <bhupesh.sharma@st.com>, Shiraz HASHIM <shiraz.hashim@st.com>, "vinod.koul@intel.com" <vinod.koul@intel.com>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Vipin KUMAR <vipin.kumar@st.com>, Armando VISCONTI <armando.visconti@st.com>, Amit VIRDI <Amit.VIRDI@st.com>, Vipul Kumar SAMAR <vipulkumar.samar@st.com>, "viresh.linux@gmail.com" <viresh.linux@gmail.com>, Deepak SIKRI <deepak.sikri@st.com>, "dan.j.williams@intel.com" <dan.j.williams@intel.com>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org> Subject: Re: [PATCH V2 08/20] dmaengine/amba-pl08x: support runtime PM Date: Thu, 4 Aug 2011 10:49:56 +0530 [thread overview] Message-ID: <4E3A2BFC.3070907@st.com> (raw) In-Reply-To: <20110803123953.GB23953@n2100.arm.linux.org.uk> On 08/03/2011 06:09 PM, Russell King - ARM Linux wrote: > On Mon, Aug 01, 2011 at 03:07:18PM +0530, Viresh Kumar wrote: >> Insert notifiers for the runtime PM API. With this the runtime PM layer kicks in >> to action where used. This will also handle enabling/disabling of interface >> clock (Code will be added in amba/bus.c by Russell King). > > I don't think this is correct... Sorry, but i couldn't get this comment completely. Mentioning clock stuff here is incorrect or mentioning about your code? Or both? Or something else? >> + pm_runtime_resume(&pl08x->adev->dev); > > Shouldn't this be pm_runtime_get_sync() ? >> + pm_runtime_suspend(&pl08x->adev->dev); > > And pm_runtime_put() ? >> + pm_runtime_suspend(&adev->dev); > > And pm_runtime_put() ? I have already fixed above in V3. > Lastly, we may want to make this even tighter to the actual period that > the DMA is being used, rather than just the period that a driver has > been allocated a channel. I'd rather have it done that way now (and > tested) so that we achieve maximal effect from runtime PM, rather than > having something which needs to be revisited again. > > IOW, if this is worth doing, then its worth doing properly first time. Correct. What about this one: --- drivers/dma/amba-pl08x.c | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-) diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c index 3fbaf0e..24353df 100644 --- a/drivers/dma/amba-pl08x.c +++ b/drivers/dma/amba-pl08x.c @@ -84,6 +84,7 @@ #include <linux/init.h> #include <linux/interrupt.h> #include <linux/module.h> +#include <linux/pm_runtime.h> #include <linux/seq_file.h> #include <linux/slab.h> #include <asm/hardware/pl080.h> @@ -405,6 +406,7 @@ pl08x_get_phy_channel(struct pl08x_driver_data *pl08x, return NULL; } + pm_runtime_get_sync(&pl08x->adev->dev); return ch; } @@ -418,6 +420,8 @@ static inline void pl08x_put_phy_channel(struct pl08x_driver_data *pl08x, /* Stop the channel and clear its interrupts */ pl08x_terminate_phy_chan(pl08x, ch); + pm_runtime_put(&pl08x->adev->dev); + /* Mark it as free */ ch->serving = NULL; spin_unlock_irqrestore(&ch->lock, flags); @@ -1855,6 +1859,9 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id) goto out_no_pl08x; } + pm_runtime_set_active(&adev->dev); + pm_runtime_enable(&adev->dev); + /* Initialize memcpy engine */ dma_cap_set(DMA_MEMCPY, pl08x->memcpy.cap_mask); pl08x->memcpy.dev = &adev->dev; @@ -1993,6 +2000,8 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id) dev_info(&pl08x->adev->dev, "DMA: PL%03x rev%u at 0x%08llx irq %d\n", amba_part(adev), amba_rev(adev), (unsigned long long)adev->res.start, adev->irq[0]); + + pm_runtime_put(&adev->dev); return 0; out_no_slave_reg: @@ -2011,6 +2020,9 @@ out_no_ioremap: dma_pool_destroy(pl08x->pool); out_no_lli_pool: out_no_platdata: + pm_runtime_put(&adev->dev); + pm_runtime_disable(&adev->dev); + kfree(pl08x); out_no_pl08x: amba_release_regions(adev); -- viresh
WARNING: multiple messages have this Message-ID (diff)
From: viresh.kumar@st.com (viresh kumar) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH V2 08/20] dmaengine/amba-pl08x: support runtime PM Date: Thu, 4 Aug 2011 10:49:56 +0530 [thread overview] Message-ID: <4E3A2BFC.3070907@st.com> (raw) In-Reply-To: <20110803123953.GB23953@n2100.arm.linux.org.uk> On 08/03/2011 06:09 PM, Russell King - ARM Linux wrote: > On Mon, Aug 01, 2011 at 03:07:18PM +0530, Viresh Kumar wrote: >> Insert notifiers for the runtime PM API. With this the runtime PM layer kicks in >> to action where used. This will also handle enabling/disabling of interface >> clock (Code will be added in amba/bus.c by Russell King). > > I don't think this is correct... Sorry, but i couldn't get this comment completely. Mentioning clock stuff here is incorrect or mentioning about your code? Or both? Or something else? >> + pm_runtime_resume(&pl08x->adev->dev); > > Shouldn't this be pm_runtime_get_sync() ? >> + pm_runtime_suspend(&pl08x->adev->dev); > > And pm_runtime_put() ? >> + pm_runtime_suspend(&adev->dev); > > And pm_runtime_put() ? I have already fixed above in V3. > Lastly, we may want to make this even tighter to the actual period that > the DMA is being used, rather than just the period that a driver has > been allocated a channel. I'd rather have it done that way now (and > tested) so that we achieve maximal effect from runtime PM, rather than > having something which needs to be revisited again. > > IOW, if this is worth doing, then its worth doing properly first time. Correct. What about this one: --- drivers/dma/amba-pl08x.c | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-) diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c index 3fbaf0e..24353df 100644 --- a/drivers/dma/amba-pl08x.c +++ b/drivers/dma/amba-pl08x.c @@ -84,6 +84,7 @@ #include <linux/init.h> #include <linux/interrupt.h> #include <linux/module.h> +#include <linux/pm_runtime.h> #include <linux/seq_file.h> #include <linux/slab.h> #include <asm/hardware/pl080.h> @@ -405,6 +406,7 @@ pl08x_get_phy_channel(struct pl08x_driver_data *pl08x, return NULL; } + pm_runtime_get_sync(&pl08x->adev->dev); return ch; } @@ -418,6 +420,8 @@ static inline void pl08x_put_phy_channel(struct pl08x_driver_data *pl08x, /* Stop the channel and clear its interrupts */ pl08x_terminate_phy_chan(pl08x, ch); + pm_runtime_put(&pl08x->adev->dev); + /* Mark it as free */ ch->serving = NULL; spin_unlock_irqrestore(&ch->lock, flags); @@ -1855,6 +1859,9 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id) goto out_no_pl08x; } + pm_runtime_set_active(&adev->dev); + pm_runtime_enable(&adev->dev); + /* Initialize memcpy engine */ dma_cap_set(DMA_MEMCPY, pl08x->memcpy.cap_mask); pl08x->memcpy.dev = &adev->dev; @@ -1993,6 +2000,8 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id) dev_info(&pl08x->adev->dev, "DMA: PL%03x rev%u at 0x%08llx irq %d\n", amba_part(adev), amba_rev(adev), (unsigned long long)adev->res.start, adev->irq[0]); + + pm_runtime_put(&adev->dev); return 0; out_no_slave_reg: @@ -2011,6 +2020,9 @@ out_no_ioremap: dma_pool_destroy(pl08x->pool); out_no_lli_pool: out_no_platdata: + pm_runtime_put(&adev->dev); + pm_runtime_disable(&adev->dev); + kfree(pl08x); out_no_pl08x: amba_release_regions(adev); -- viresh
next prev parent reply other threads:[~2011-08-04 5:20 UTC|newest] Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-08-01 9:37 [PATCH V2 00/20] dmaengine/amba-pl08x updates Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 01/20] ARM: asm/pl080.h: Protect against multiple inclusion of header file Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 02/20] dmaengine/amba-pl08x: Resolve formatting issues Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 03/20] dmaengine/amba-pl08x: Rearrange inclusion of header files in ascending order Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:52 ` Sergei Shtylyov 2011-08-01 9:52 ` Sergei Shtylyov 2011-08-01 10:34 ` viresh kumar 2011-08-01 10:34 ` viresh kumar 2011-08-01 9:37 ` [PATCH V2 04/20] dmaengine/amba-pl08x: pass (*ptr) to sizeof() instead of (struct xyz) Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 05/20] dmaengine/amba-pl08x: Complete doc comment for struct pl08x_txd Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 06/20] dmaengine/amba-pl08x: Remove redundant comment and rewrite original Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 07/20] dmaengine/amba-pl08x: Changing few prints to dev_dbg from dev_info Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-04 8:28 ` Koul, Vinod 2011-08-04 8:28 ` Koul, Vinod 2011-08-04 9:25 ` viresh kumar 2011-08-04 9:25 ` viresh kumar 2011-08-04 8:53 ` Koul, Vinod 2011-08-04 8:53 ` Koul, Vinod 2011-08-01 9:37 ` [PATCH V2 08/20] dmaengine/amba-pl08x: support runtime PM Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 10:26 ` Russell King - ARM Linux 2011-08-01 10:26 ` Russell King - ARM Linux 2011-08-01 11:55 ` viresh kumar 2011-08-01 11:55 ` viresh kumar 2011-08-03 12:39 ` Russell King - ARM Linux 2011-08-03 12:39 ` Russell King - ARM Linux 2011-08-04 5:19 ` viresh kumar [this message] 2011-08-04 5:19 ` viresh kumar 2011-08-04 5:36 ` Koul, Vinod 2011-08-04 5:36 ` Koul, Vinod 2011-08-04 6:31 ` viresh kumar 2011-08-04 6:31 ` viresh kumar 2011-08-04 7:28 ` Koul, Vinod 2011-08-04 7:28 ` Koul, Vinod 2011-08-04 8:42 ` viresh kumar 2011-08-04 8:42 ` viresh kumar 2011-08-01 9:37 ` [PATCH V2 09/20] dmaengine/amba-pl08x: Simplify pl08x_ensure_on() Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 10/20] dmaengine/amba-pl08x: No need to check "ch->signal < 0" Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 11/20] dmaengine/amba-pl08x: Schedule tasklet in case of error interrupt Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 12/20] dmaengine/amba-pl08x: Get rid of pl08x_pre_boundary() Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 13/20] dmaengine/amba-pl08x: max_bytes_per_lli is TRANSFER_SIZE * src_width (not MIN(width)) Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 14/20] dmaengine/amba-pl08x: Add prep_single_byte_llis() routine Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 15/20] dmaengine/amba-pl08x: Align lli_len to max(src.width, dst.width) Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 16/20] dmaengine/amba-pl08x: Choose peripheral bus as master bus Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 17/20] dmaengine/amba-pl08x: Pass flow controller information with slave channel data Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 18/20] dmaengine/amba-pl08x: Add support for sg len greater than one for slave transfers Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-04 10:27 ` viresh kumar 2011-08-04 10:27 ` viresh kumar 2011-08-01 9:37 ` [PATCH V2 19/20] dmaengine/amba-pl08x: Check txd->llis_va before freeing dma_pool Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 20/20] dmaengine/amba-pl08x: Call pl08x_free_txd() instead of calling kfree() directly Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 11:56 ` [PATCH V3 08/20] dmaengine/amba-pl08x: support runtime PM Viresh Kumar 2011-08-01 11:56 ` Viresh Kumar 2011-08-04 8:52 ` Koul, Vinod 2011-08-04 8:52 ` Koul, Vinod 2011-08-04 9:41 ` viresh kumar 2011-08-04 9:41 ` viresh kumar
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