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Revision 2b6c53b1504865728a6dfad3e720918a2f89f3a5 authored by Jon Medhurst (Tixy) on 20 August 2014, 12:41:04 UTC, committed by Tomi Valkeinen on 26 August 2014, 09:50:27 UTC 
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>
1 parent 754d561
Raw File
debug_locks.c 
/*
 * lib/debug_locks.c
 *
 * Generic place for common debugging facilities for various locks:
 * spinlocks, rwlocks, mutexes and rwsems.
 *
 * Started by Ingo Molnar:
 *
 *  Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
 */
#include <linux/rwsem.h>
#include <linux/mutex.h>
#include <linux/export.h>
#include <linux/spinlock.h>
#include <linux/debug_locks.h>

/*
 * We want to turn all lock-debugging facilities on/off at once,
 * via a global flag. The reason is that once a single bug has been
 * detected and reported, there might be cascade of followup bugs
 * that would just muddy the log. So we report the first one and
 * shut up after that.
 */
int debug_locks = 1;
EXPORT_SYMBOL_GPL(debug_locks);

/*
 * The locking-testsuite uses <debug_locks_silent> to get a
 * 'silent failure': nothing is printed to the console when
 * a locking bug is detected.
 */
int debug_locks_silent;
EXPORT_SYMBOL_GPL(debug_locks_silent);

/*
 * Generic 'turn off all lock debugging' function:
 */
int debug_locks_off(void)
{
	if (__debug_locks_off()) {
		if (!debug_locks_silent) {
			console_verbose();
			return 1;
		}
	}
	return 0;
}
EXPORT_SYMBOL_GPL(debug_locks_off);
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