tree d54533ccd807a97d74365e065157dd36a3439991
parent 754d561ab694ff240ad1615abd0d99f3c1db79a2
author Jon Medhurst (Tixy) <tixy@linaro.org> 1408538464 +0100
committer Tomi Valkeinen <tomi.valkeinen@ti.com> 1409046627 +0300

video: ARM CLCD: Fix calculation of bits-per-pixel

If the device-tree specifies a max-memory-bandwidth property then the
CLCD driver uses that to calculate the bits-per-pixel supported,
however, this calculation is faulty for two reasons.

1. It doesn't ensure that the result is a sane value, i.e. a power of 2
   and <= 32 as the rest of the code assumes.

2. It uses the displayed resolution and calculates the average bandwidth
   across the whole frame. It should instead calculate the peak
   bandwidth based on the pixel clock.

This patch fixes both the above.

Signed-off-by: Jon Medhurst <tixy@linaro.org>
Acked-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>