From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] atmel_lcdfb: support 16bit BGR:565 mode, remove
Date: Tue, 10 Jan 2012 21:06:08 +0000 [thread overview]
Message-ID: <20120110210608.GB1068@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <20120110140218.GB7180@jl-vm1.vm.bytemark.co.uk>
On Tue, Jan 10, 2012 at 02:02:18PM +0000, Jamie Lokier wrote:
> If you're connecting an RGB555 or RGB444 panel, don't you want the
> software using the framebuffer to know this so it will dither appropriately?
>
> E.g. gradients look "bandy" if drawn in RGB565 then green's LSB is dropped.
This is why you use the bitfield stuff to tell userspace what the
actual properties of the framebuffer are.
(However, there are some userspace programs which ignore that
information and think they know better than the kernel about how a
frame buffer is organised - which is a constant pain in the butt when
you have a display which isn't BGR. But that's really a userspace
bug in those silly programs.)
next prev parent reply other threads:[~2012-01-10 21:06 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-13 14:52 [PATCH] atmel_lcdfb: support 16bit BGR:565 mode, remove unsupported 15bit modes Peter Korsgaard
2012-01-05 11:26 ` Peter Korsgaard
2012-01-09 2:49 ` [PATCH] atmel_lcdfb: support 16bit BGR:565 mode, remove unsupported Florian Tobias Schandinat
2012-01-09 6:15 ` [PATCH] atmel_lcdfb: support 16bit BGR:565 mode, remove unsupported 15bit modes Peter Korsgaard
2012-01-09 13:36 ` [PATCH] atmel_lcdfb: support 16bit BGR:565 mode, remove unsupported Nicolas Ferre
2012-01-09 10:34 ` Nicolas Ferre
2012-01-09 11:13 ` [PATCH] atmel_lcdfb: support 16bit BGR:565 mode, remove unsupported 15bit modes Peter Korsgaard
2012-01-09 13:32 ` [PATCH] atmel_lcdfb: support 16bit BGR:565 mode, remove unsupported Nicolas Ferre
2012-01-10 13:01 ` [PATCH] atmel_lcdfb: support 16bit BGR:565 mode, remove Christian Glindkamp
2012-01-10 13:17 ` [PATCH] atmel_lcdfb: support 16bit BGR:565 mode, remove unsupported 15bit modes Peter Korsgaard
2012-01-10 16:42 ` Peter Korsgaard
2012-01-10 14:02 ` [PATCH] atmel_lcdfb: support 16bit BGR:565 mode, remove Jamie Lokier
2012-01-10 14:19 ` [PATCH] atmel_lcdfb: support 16bit BGR:565 mode, remove unsupported 15bit modes Peter Korsgaard
2012-01-10 21:06 ` Russell King - ARM Linux [this message]
2012-01-09 12:13 ` [PATCH] atmel_lcdfb: support 16bit BGR:565 mode, remove Russell King - ARM Linux
2012-01-09 12:20 ` [PATCH] atmel_lcdfb: support 16bit BGR:565 mode, remove unsupported 15bit modes Peter Korsgaard
2012-01-30 5:12 ` Florian Tobias Schandinat
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