2019-07-30 19:31:11

by Souptick Joarder

[permalink] [raw]
Subject: [PATCH] video: fbdev:via: Remove dead code

This is dead code since 3.15. If there is no plan to use
it further, this can be removed forever.

Signed-off-by: Souptick Joarder <[email protected]>
---
drivers/video/fbdev/via/via-core.c | 43 --------------------------------------
1 file changed, 43 deletions(-)

diff --git a/drivers/video/fbdev/via/via-core.c b/drivers/video/fbdev/via/via-core.c
index e2b2062..ffa2ca2 100644
--- a/drivers/video/fbdev/via/via-core.c
+++ b/drivers/video/fbdev/via/via-core.c
@@ -221,49 +221,6 @@ void viafb_release_dma(void)
}
EXPORT_SYMBOL_GPL(viafb_release_dma);

-
-#if 0
-/*
- * Copy a single buffer from FB memory, synchronously. This code works
- * but is not currently used.
- */
-void viafb_dma_copy_out(unsigned int offset, dma_addr_t paddr, int len)
-{
- unsigned long flags;
- int csr;
-
- mutex_lock(&viafb_dma_lock);
- init_completion(&viafb_dma_completion);
- /*
- * Program the controller.
- */
- spin_lock_irqsave(&global_dev.reg_lock, flags);
- viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_DONE);
- /* Enable ints; must happen after CSR0 write! */
- viafb_mmio_write(VDMA_MR0, VDMA_MR_TDIE);
- viafb_mmio_write(VDMA_MARL0, (int) (paddr & 0xfffffff0));
- viafb_mmio_write(VDMA_MARH0, (int) ((paddr >> 28) & 0xfff));
- /* Data sheet suggests DAR0 should be <<4, but it lies */
- viafb_mmio_write(VDMA_DAR0, offset);
- viafb_mmio_write(VDMA_DQWCR0, len >> 4);
- viafb_mmio_write(VDMA_TMR0, 0);
- viafb_mmio_write(VDMA_DPRL0, 0);
- viafb_mmio_write(VDMA_DPRH0, 0);
- viafb_mmio_write(VDMA_PMR0, 0);
- csr = viafb_mmio_read(VDMA_CSR0);
- viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_START);
- spin_unlock_irqrestore(&global_dev.reg_lock, flags);
- /*
- * Now we just wait until the interrupt handler says
- * we're done.
- */
- wait_for_completion_interruptible(&viafb_dma_completion);
- viafb_mmio_write(VDMA_MR0, 0); /* Reset int enable */
- mutex_unlock(&viafb_dma_lock);
-}
-EXPORT_SYMBOL_GPL(viafb_dma_copy_out);
-#endif
-
/*
* Do a scatter/gather DMA copy from FB memory. You must have done
* a successful call to viafb_request_dma() first.
--
1.9.1


2019-08-07 09:16:35

by Souptick Joarder

[permalink] [raw]
Subject: Re: [PATCH] video: fbdev:via: Remove dead code

On Wed, Jul 31, 2019 at 12:59 AM Souptick Joarder <[email protected]> wrote:
>
> This is dead code since 3.15. If there is no plan to use
> it further, this can be removed forever.
>

Any comment on this patch ?

> Signed-off-by: Souptick Joarder <[email protected]>
> ---
> drivers/video/fbdev/via/via-core.c | 43 --------------------------------------
> 1 file changed, 43 deletions(-)
>
> diff --git a/drivers/video/fbdev/via/via-core.c b/drivers/video/fbdev/via/via-core.c
> index e2b2062..ffa2ca2 100644
> --- a/drivers/video/fbdev/via/via-core.c
> +++ b/drivers/video/fbdev/via/via-core.c
> @@ -221,49 +221,6 @@ void viafb_release_dma(void)
> }
> EXPORT_SYMBOL_GPL(viafb_release_dma);
>
> -
> -#if 0
> -/*
> - * Copy a single buffer from FB memory, synchronously. This code works
> - * but is not currently used.
> - */
> -void viafb_dma_copy_out(unsigned int offset, dma_addr_t paddr, int len)
> -{
> - unsigned long flags;
> - int csr;
> -
> - mutex_lock(&viafb_dma_lock);
> - init_completion(&viafb_dma_completion);
> - /*
> - * Program the controller.
> - */
> - spin_lock_irqsave(&global_dev.reg_lock, flags);
> - viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_DONE);
> - /* Enable ints; must happen after CSR0 write! */
> - viafb_mmio_write(VDMA_MR0, VDMA_MR_TDIE);
> - viafb_mmio_write(VDMA_MARL0, (int) (paddr & 0xfffffff0));
> - viafb_mmio_write(VDMA_MARH0, (int) ((paddr >> 28) & 0xfff));
> - /* Data sheet suggests DAR0 should be <<4, but it lies */
> - viafb_mmio_write(VDMA_DAR0, offset);
> - viafb_mmio_write(VDMA_DQWCR0, len >> 4);
> - viafb_mmio_write(VDMA_TMR0, 0);
> - viafb_mmio_write(VDMA_DPRL0, 0);
> - viafb_mmio_write(VDMA_DPRH0, 0);
> - viafb_mmio_write(VDMA_PMR0, 0);
> - csr = viafb_mmio_read(VDMA_CSR0);
> - viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_START);
> - spin_unlock_irqrestore(&global_dev.reg_lock, flags);
> - /*
> - * Now we just wait until the interrupt handler says
> - * we're done.
> - */
> - wait_for_completion_interruptible(&viafb_dma_completion);
> - viafb_mmio_write(VDMA_MR0, 0); /* Reset int enable */
> - mutex_unlock(&viafb_dma_lock);
> -}
> -EXPORT_SYMBOL_GPL(viafb_dma_copy_out);
> -#endif
> -
> /*
> * Do a scatter/gather DMA copy from FB memory. You must have done
> * a successful call to viafb_request_dma() first.
> --
> 1.9.1
>

2019-08-12 12:08:47

by Souptick Joarder

[permalink] [raw]
Subject: Re: [PATCH] video: fbdev:via: Remove dead code

On Wed, Aug 7, 2019 at 2:11 PM Souptick Joarder <[email protected]> wrote:
>
> On Wed, Jul 31, 2019 at 12:59 AM Souptick Joarder <[email protected]> wrote:
> >
> > This is dead code since 3.15. If there is no plan to use
> > it further, this can be removed forever.
> >
>
> Any comment on this patch ?

Any comment on this patch ?

>
> > Signed-off-by: Souptick Joarder <[email protected]>
> > ---
> > drivers/video/fbdev/via/via-core.c | 43 --------------------------------------
> > 1 file changed, 43 deletions(-)
> >
> > diff --git a/drivers/video/fbdev/via/via-core.c b/drivers/video/fbdev/via/via-core.c
> > index e2b2062..ffa2ca2 100644
> > --- a/drivers/video/fbdev/via/via-core.c
> > +++ b/drivers/video/fbdev/via/via-core.c
> > @@ -221,49 +221,6 @@ void viafb_release_dma(void)
> > }
> > EXPORT_SYMBOL_GPL(viafb_release_dma);
> >
> > -
> > -#if 0
> > -/*
> > - * Copy a single buffer from FB memory, synchronously. This code works
> > - * but is not currently used.
> > - */
> > -void viafb_dma_copy_out(unsigned int offset, dma_addr_t paddr, int len)
> > -{
> > - unsigned long flags;
> > - int csr;
> > -
> > - mutex_lock(&viafb_dma_lock);
> > - init_completion(&viafb_dma_completion);
> > - /*
> > - * Program the controller.
> > - */
> > - spin_lock_irqsave(&global_dev.reg_lock, flags);
> > - viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_DONE);
> > - /* Enable ints; must happen after CSR0 write! */
> > - viafb_mmio_write(VDMA_MR0, VDMA_MR_TDIE);
> > - viafb_mmio_write(VDMA_MARL0, (int) (paddr & 0xfffffff0));
> > - viafb_mmio_write(VDMA_MARH0, (int) ((paddr >> 28) & 0xfff));
> > - /* Data sheet suggests DAR0 should be <<4, but it lies */
> > - viafb_mmio_write(VDMA_DAR0, offset);
> > - viafb_mmio_write(VDMA_DQWCR0, len >> 4);
> > - viafb_mmio_write(VDMA_TMR0, 0);
> > - viafb_mmio_write(VDMA_DPRL0, 0);
> > - viafb_mmio_write(VDMA_DPRH0, 0);
> > - viafb_mmio_write(VDMA_PMR0, 0);
> > - csr = viafb_mmio_read(VDMA_CSR0);
> > - viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_START);
> > - spin_unlock_irqrestore(&global_dev.reg_lock, flags);
> > - /*
> > - * Now we just wait until the interrupt handler says
> > - * we're done.
> > - */
> > - wait_for_completion_interruptible(&viafb_dma_completion);
> > - viafb_mmio_write(VDMA_MR0, 0); /* Reset int enable */
> > - mutex_unlock(&viafb_dma_lock);
> > -}
> > -EXPORT_SYMBOL_GPL(viafb_dma_copy_out);
> > -#endif
> > -
> > /*
> > * Do a scatter/gather DMA copy from FB memory. You must have done
> > * a successful call to viafb_request_dma() first.
> > --
> > 1.9.1
> >

2019-08-18 17:01:15

by Souptick Joarder

[permalink] [raw]
Subject: Re: [PATCH] video: fbdev:via: Remove dead code

On Mon, Aug 12, 2019 at 5:37 PM Souptick Joarder <[email protected]> wrote:
>
> On Wed, Aug 7, 2019 at 2:11 PM Souptick Joarder <[email protected]> wrote:
> >
> > On Wed, Jul 31, 2019 at 12:59 AM Souptick Joarder <[email protected]> wrote:
> > >
> > > This is dead code since 3.15. If there is no plan to use
> > > it further, this can be removed forever.
> > >
> >
> > Any comment on this patch ?
>
> Any comment on this patch ?

If no comment can we get this in queue for 5.4 ?

>
> >
> > > Signed-off-by: Souptick Joarder <[email protected]>
> > > ---
> > > drivers/video/fbdev/via/via-core.c | 43 --------------------------------------
> > > 1 file changed, 43 deletions(-)
> > >
> > > diff --git a/drivers/video/fbdev/via/via-core.c b/drivers/video/fbdev/via/via-core.c
> > > index e2b2062..ffa2ca2 100644
> > > --- a/drivers/video/fbdev/via/via-core.c
> > > +++ b/drivers/video/fbdev/via/via-core.c
> > > @@ -221,49 +221,6 @@ void viafb_release_dma(void)
> > > }
> > > EXPORT_SYMBOL_GPL(viafb_release_dma);
> > >
> > > -
> > > -#if 0
> > > -/*
> > > - * Copy a single buffer from FB memory, synchronously. This code works
> > > - * but is not currently used.
> > > - */
> > > -void viafb_dma_copy_out(unsigned int offset, dma_addr_t paddr, int len)
> > > -{
> > > - unsigned long flags;
> > > - int csr;
> > > -
> > > - mutex_lock(&viafb_dma_lock);
> > > - init_completion(&viafb_dma_completion);
> > > - /*
> > > - * Program the controller.
> > > - */
> > > - spin_lock_irqsave(&global_dev.reg_lock, flags);
> > > - viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_DONE);
> > > - /* Enable ints; must happen after CSR0 write! */
> > > - viafb_mmio_write(VDMA_MR0, VDMA_MR_TDIE);
> > > - viafb_mmio_write(VDMA_MARL0, (int) (paddr & 0xfffffff0));
> > > - viafb_mmio_write(VDMA_MARH0, (int) ((paddr >> 28) & 0xfff));
> > > - /* Data sheet suggests DAR0 should be <<4, but it lies */
> > > - viafb_mmio_write(VDMA_DAR0, offset);
> > > - viafb_mmio_write(VDMA_DQWCR0, len >> 4);
> > > - viafb_mmio_write(VDMA_TMR0, 0);
> > > - viafb_mmio_write(VDMA_DPRL0, 0);
> > > - viafb_mmio_write(VDMA_DPRH0, 0);
> > > - viafb_mmio_write(VDMA_PMR0, 0);
> > > - csr = viafb_mmio_read(VDMA_CSR0);
> > > - viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_START);
> > > - spin_unlock_irqrestore(&global_dev.reg_lock, flags);
> > > - /*
> > > - * Now we just wait until the interrupt handler says
> > > - * we're done.
> > > - */
> > > - wait_for_completion_interruptible(&viafb_dma_completion);
> > > - viafb_mmio_write(VDMA_MR0, 0); /* Reset int enable */
> > > - mutex_unlock(&viafb_dma_lock);
> > > -}
> > > -EXPORT_SYMBOL_GPL(viafb_dma_copy_out);
> > > -#endif
> > > -
> > > /*
> > > * Do a scatter/gather DMA copy from FB memory. You must have done
> > > * a successful call to viafb_request_dma() first.
> > > --
> > > 1.9.1
> > >

Subject: Re: [PATCH] video: fbdev:via: Remove dead code


On 8/18/19 6:59 PM, Souptick Joarder wrote:
> On Mon, Aug 12, 2019 at 5:37 PM Souptick Joarder <[email protected]> wrote:
>>
>> On Wed, Aug 7, 2019 at 2:11 PM Souptick Joarder <[email protected]> wrote:
>>>
>>> On Wed, Jul 31, 2019 at 12:59 AM Souptick Joarder <[email protected]> wrote:
>>>>
>>>> This is dead code since 3.15. If there is no plan to use
>>>> it further, this can be removed forever.
>>>>
>>>
>>> Any comment on this patch ?
>>
>> Any comment on this patch ?
>
> If no comment can we get this in queue for 5.4 ?
>
>>
>>>
>>>> Signed-off-by: Souptick Joarder <[email protected]>

Patch queued for v5.4, thanks.

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics