From: Andy Shevchenko <andriy.shevchenko@intel.com>
To: Nam Cao <namcao@linutronix.de>
Cc: Omer PALA <palaomer100@gmail.com>,
andy@kernel.org, gregkh@linuxfoundation.org,
dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org,
linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] staging: fbtft: fb_upd161704: replace udelay with usleep_range
Date: Wed, 16 Sep 2026 14:06:00 +0300 [thread overview]
Message-ID: <aqp4GA1q6cLKivZo@ashevche-desk.local> (raw)
In-Reply-To: <87ecet5xos.fsf@yellow.woof>
On Wed, Sep 16, 2026 at 11:53:55AM +0200, Nam Cao wrote:
> Omer PALA <palaomer100@gmail.com> writes:
...
> Btw, I am curious why we have these udelay(). Can we remove them?
Once again remind people that FBTFT works for both busses: SPI and parallel,
the latter one is usually GPIO-based and quite slow (I have one of the panel in
this mode, it gives me ~2-3fps at best on a 10y.o. x86_64 embedded device).
Maybe that's the reason? In any case, I think the datasheet on the panel should
answer the question.
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2026-09-16 11:06 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-16 9:39 [PATCH] staging: fbtft: fb_upd161704: replace udelay with usleep_range Omer PALA
2026-09-16 9:53 ` Nam Cao
2026-09-16 11:06 ` Andy Shevchenko [this message]
2026-09-16 12:08 ` Ömer PALA
2026-09-16 12:50 ` Nam Cao
2026-09-16 13:14 ` Ömer PALA
2026-09-16 15:17 ` Andy Shevchenko
2026-09-16 11:03 ` Andy Shevchenko
[not found] <20260218180347.88034-1-tomasz.unger.ref@yahoo.pl>
2026-02-18 18:03 ` tomasz.unger
2026-02-19 7:30 ` Andy Shevchenko
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