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

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Date:   Fri, 19 May 2023 16:49:22 +0200
From:   Helge Deller <deller@....de>
To:     Ville Syrjälä <ville.syrjala@...ux.intel.com>,
        Niklas Schnelle <schnelle@...ux.ibm.com>
Cc:     Arnd Bergmann <arnd@...db.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 5/16/23 14:24, Ville Syrjälä wrote:
> 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

applied this patch to fbdev git tree.

Thanks!

Helge

>>
>>   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
>