From: jacmet@sunsite•dk (Peter Korsgaard)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH] atmel_lcdfb: support 16bit BGR:565 mode, remove unsupported 15bit modes
Date: Mon, 09 Jan 2012 13:20:13 +0100 [thread overview]
Message-ID: <87mx9xdq4i.fsf@macbook.be.48ers.dk> (raw)
In-Reply-To: <20120109121322.GM21765@n2100.arm.linux.org.uk> (Russell King's message of "Mon, 9 Jan 2012 12:13:22 +0000")
>>>>> "Russell" == Russell King <- ARM Linux <linux@arm•linux.org.uk>> writes:
Hi,
Russell> You describe the RGB555 vs RGB565 via the bitfield values in
Russell> var->red, var-> green and var->blue. So, RGB(or BGR)565 has
Russell> var->green.length with 6, and RGB(or BGR)555 has this as 5.
Russell> In both cases, bits_per_pixel is 16 as that's the width of a
Russell> pixel in the frame buffer.
Russell> If the bitfield can't be interpreted by the driver as
Russell> identifying one of these combinations, then you're supposed to
Russell> chose one (and in the case where it's fixed by hardware, you
Russell> set the bitfields according to what the hardware supports.)
Indeed, and as the hardware can only interprete 1/2/4/8 paletted and
16/24 RGB, we shouldn't claim to support 15bit.
--
Bye, Peter Korsgaard
next prev parent reply other threads:[~2012-01-09 12:20 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 ` Florian Tobias Schandinat
2012-01-09 6:15 ` Peter Korsgaard
2012-01-09 13:36 ` Nicolas Ferre
2012-01-09 10:34 ` Nicolas Ferre
2012-01-09 11:13 ` Peter Korsgaard
2012-01-09 13:32 ` Nicolas Ferre
2012-01-10 13:01 ` Christian Glindkamp
2012-01-10 13:17 ` Peter Korsgaard
2012-01-10 16:42 ` Peter Korsgaard
2012-01-10 14:02 ` Jamie Lokier
2012-01-10 14:19 ` Peter Korsgaard
2012-01-10 21:06 ` Russell King - ARM Linux
2012-01-09 12:13 ` Russell King - ARM Linux
2012-01-09 12:20 ` Peter Korsgaard [this message]
2012-01-30 5:12 ` Florian Tobias Schandinat
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