linux-kernel - Re: [PATCH 8/8] fbdev: sm712fb: use 1024x768 by default on non-MIPS, fix garbled display.

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Message-ID: <20190331122103.o7ek46dvhop7lewm@debian>
Date:   Sun, 31 Mar 2019 13:21:03 +0100
From:   Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:     Yifeng Li <tomli@...li.me>
Cc:     Teddy Wang <teddy.wang@...iconmotion.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH 8/8] fbdev: sm712fb: use 1024x768 by default on non-MIPS,
 fix garbled display.

On Sun, Mar 17, 2019 at 06:25:04AM +0800, Yifeng Li wrote:
> Loongson MIPS netbooks use 1024x600 LCD panels, which is the original
> target platform of this driver, but nearly all old x86 laptops have
> 1024x768. Lighting 768 panels using 600's timings would partially
> garble the display. Since it's not possible to distinguish them reliably,
> we change the default to 768, but keep 600 as-is on MIPS.
> 
> Further, earlier laptops, such as IBM Thinkpad 240X, has a 800x600 LCD
> panel, this driver would probably garbled those display. As we don't
> have one for testing, the original behavior of the driver is kept as-is,
> but the problem has been documented is the comments.
> 
> Signed-off-by: Yifeng Li <tomli@...li.me>
> Cc: stable@...r.kernel.org  # v4.4+

Tested-by: Sudip Mukherjee <sudipm.mukherjee@...il.com>

--
Regards
Sudip