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

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Message-ID: <CAFqt6zb5ySDbkHVpPkOKHTrF8jFuNh=dXtnwPKO6TuEHBCkYgg@mail.gmail.com>
Date:   Wed, 7 Aug 2019 14:11:27 +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, 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 ?

> 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
>