[SRU][RFC][Utopic] Pull Request: powerpc: backport AST graphic driver updates for OpenPower

[Joseph Salisbury]

A test build was performed for powerpc without any failures.  However,
testing on actual hardware was not performed yet, but testing was requested in the bug.  

A test kernel was posted for testing here:
http://kernel.ubuntu.com/~jsalisbury/lp1420627/

Requesting review and feedback on these patches.


The following changes since commit e093858a13f30d8b981b5e9a750bf3b1ff60d819:

  UBUNTU: Ubuntu-3.16.0-32.42 (2015-03-03 13:01:54 -0600)

are available in the git repository at:

  zinc.canonical.com:/srv/kernel.ubuntu.com/git/jsalisbury/bugs/lp1420627/ubuntu-utopic.git 

for you to fetch changes up to 13a15d170a08023f9f16ed6ab3086b08e59f9b30:

  [PATCH 8/8] drm/ast: Cleanup analog init code path (2015-03-05 13:04:49 -0500)

----------------------------------------------------------------
Benjamin Herrenschmidt (5):
      drm/ast: Try to use MMIO registers when PIO isn't supported
      drm/ast: POST chip at probe time if VGA not enabled
      drm/ast: Properly initialize P2A base before using it in ast_init_3rdtx()
      drm/ast: Don't assume DVO enabled means SIL164 on uninitialized chips
      drm/ast: Cleanup analog init code path

Dave Airlie (1):
      drm/ast: switch to using CACHED by default for sysram

Y.C. Chen (2):
      drm/ast: Add missing entry to dclk_table[]
      drm/ast: Add reduced blanking modes for wide screen mode

 drivers/gpu/drm/ast/ast_dp501.c  | 38 +++++++++++++++----
 drivers/gpu/drm/ast/ast_drv.h    |  8 +++-
 drivers/gpu/drm/ast/ast_main.c   | 79 ++++++++++++++++++++++++++++++++++++----
 drivers/gpu/drm/ast/ast_mode.c   | 42 ++++++++++++++++-----
 drivers/gpu/drm/ast/ast_post.c   | 23 +++++++-----
 drivers/gpu/drm/ast/ast_tables.h | 39 ++++++++++++--------
 drivers/gpu/drm/ast/ast_ttm.c    |  4 +-
 7 files changed, 182 insertions(+), 51 deletions(-)