1. 13 Jun, 2016 3 commits
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  3. 09 Jun, 2016 33 commits
  4. 08 Jun, 2016 1 commit
    • Stefan Agner's avatar
      drm/fsl-dcu: use flat regmap cache · ce492b3b
      Stefan Agner authored
      Using flat regmap cache instead of RB-tree to avoid the following
      lockdep warning on driver load:
      WARNING: CPU: 0 PID: 1 at kernel/locking/lockdep.c:2755 lockdep_trace_alloc+0x15c/0x160()
      DEBUG_LOCKS_WARN_ON(irqs_disabled_flags(flags))
      
      The RB-tree regmap cache needs to allocate new space on first
      writes. However, allocations in an atomic context (e.g. when a
      spinlock is held) are not allowed. The function regmap_write
      calls map->lock, which acquires a spinlock in the fast_io case.
      Since the FSL DCU driver uses MMIO, the regmap bus of type
      regmap_mmio is being used which has fast_io set to true.
      
      Use flat regmap cache and specify max register to be large
      enouth to cover all registers available in LS1021a and Vybrids
      register space.
      Signed-off-by: default avatarStefan Agner <stefan@agner.ch>
      Cc: Mark Brown <broonie@kernel.org>
      Cc: stable@vger.kernel.org
      ce492b3b