linux-kernel - Re: [PATCH] video: fbdev:via: Remove dead code

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Date:   Mon, 12 Aug 2019 17:37:28 +0530
From:   Souptick Joarder <jrdr.linux@...il.com>
To:     FlorianSchandinat@....de, b.zolnierkie@...sung.com
Cc:     linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] video: fbdev:via: Remove dead code

On Wed, Aug 7, 2019 at 2:11 PM Souptick Joarder <jrdr.linux@...il.com> wrote:
>
> On Wed, Jul 31, 2019 at 12:59 AM Souptick Joarder <jrdr.linux@...il.com> 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 <jrdr.linux@...il.com>
> > ---
> >  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
> >