linux-kernel - Re: [PATCH v4 37/41] fbdev: atyfb: Remove unused clock determination

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Date:   Tue, 16 May 2023 15:24:52 +0300
From:   Ville Syrjälä <ville.syrjala@...ux.intel.com>
To:     Niklas Schnelle <schnelle@...ux.ibm.com>
Cc:     Arnd Bergmann <arnd@...db.de>, Helge Deller <deller@....de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Alan Stern <stern@...land.harvard.edu>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-pci@...r.kernel.org, linux-fbdev@...r.kernel.org,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v4 37/41] fbdev: atyfb: Remove unused clock determination

On Tue, May 16, 2023 at 01:00:33PM +0200, Niklas Schnelle wrote:
> Just below the removed lines par->clk_wr_offset is hard coded to 3 so
> there is no use in determining a different clock just to then ignore it
> anyway. This also removes the only I/O port use remaining in the driver
> allowing it to be built without CONFIG_HAS_IOPORT.
> 
> Link: https://lore.kernel.org/all/ZBx5aLo5h546BzBt@intel.com/
> Suggested-by: Ville Syrjälä <ville.syrjala@...ux.intel.com>
> Signed-off-by: Niklas Schnelle <schnelle@...ux.ibm.com>

Reviewed-by: Ville Syrjälä <ville.syrjala@...ux.intel.com>

> ---
> Note: The HAS_IOPORT Kconfig option was added in v6.4-rc1 so
>       per-subsystem patches may be applied independently
> 
>  drivers/video/fbdev/aty/atyfb_base.c | 5 -----
>  1 file changed, 5 deletions(-)
> 
> diff --git a/drivers/video/fbdev/aty/atyfb_base.c b/drivers/video/fbdev/aty/atyfb_base.c
> index b02e4e645035..cba2b113b28b 100644
> --- a/drivers/video/fbdev/aty/atyfb_base.c
> +++ b/drivers/video/fbdev/aty/atyfb_base.c
> @@ -3498,11 +3498,6 @@ static int atyfb_setup_generic(struct pci_dev *pdev, struct fb_info *info,
>  	if (ret)
>  		goto atyfb_setup_generic_fail;
>  #endif
> -	if (!(aty_ld_le32(CRTC_GEN_CNTL, par) & CRTC_EXT_DISP_EN))
> -		par->clk_wr_offset = (inb(R_GENMO) & 0x0CU) >> 2;
> -	else
> -		par->clk_wr_offset = aty_ld_8(CLOCK_CNTL, par) & 0x03U;
> -
>  	/* according to ATI, we should use clock 3 for acelerated mode */
>  	par->clk_wr_offset = 3;
>  
> -- 
> 2.39.2

-- 
Ville Syrjälä
Intel