tree cbd325caae3dd704373b6978a1e2368c7ad6e88c
parent 1014cc38280f29ea0a39ec9a853fa0c3fdfebc7c
author Vasily Khoruzhick <anarsoul@gmail.com> 1299835247 +0200
committer Eric Miao <eric.y.miao@gmail.com> 1300268223 +0800

ARM: pxafb: rework pxafb overlay memory management

PXAFB overlay memory management is something messy:
- it allocates memory dynamically on open/release, and it results
  in memory allocation failure after ~1h of uptime (system does not have
  115k of physically contiguous memory)
- in release callback it tries to free memory even if it was not
  allocated.

Also driver touches FDADR1 on main plane reconfiguration, and it can cause
problems if overlay1 is enabled.

This patch attempts to fix those issues.

Patch is based on Russell King's work.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>