[PATCH 0/2] drm/tilcdc drm/i2c/tda998x workaround for sync issues on TI SoC

[Darren Etheridge]

Russell King and Sebastian Hasselbarth had proposed some very good changes
for the tda998x HDMI encoder driver.  But when those changes were tested
on BeagleBone Black against the tilcdc driver many modes would no longer
display correctly.  After analyzing the sync signals from the TI lcd contoller
to the nxp it is apparent that the hsync/vsync's are not rising at the same 
time as per the VESA spec and this is causing the HDMI encoder to get 
messed up and failing to lock correctly.

This series of patches should be applied on top of:

Russell King's
rmk's Dove DRM/TDA19988 Cubox driver series

Sebastian Hasselbarth's
drm/i2c: tda998x: fix sync generation and calculation

I have done as much of the change as I can in the tilcdc driver but there 
is a small unavoidable change in the tda998x driver.  However I have been 
careful not to break anything from the Dove drivers perspective. It 
would be great if somebody can test on Cubox and confirm that.

This patch set inverts the hsync signal coming from the tilcdc so the NXP 
is kept happy and then shifts the output to the right to compensate for the 
sync timing issues.  Display modes from the NXP have been verified using a
HDMI analyzer and are reporting correct timings at the output stage.

Hopefully this will allow the dove/tda driver changes to progress now that
were blocked as per this discussion:
http://lists.freedesktop.org/archives/dri-devel/2013-July/040900.html


Darren Etheridge (2):
  drm/i2c/tda998x prepare for tilcdc sync workaround
  drm/tilcdc fixup mode to workaound sync for tda998x

 drivers/gpu/drm/i2c/tda998x_drv.c     |   10 ++++++++++
 drivers/gpu/drm/tilcdc/tilcdc_crtc.c  |    7 ++++++-
 drivers/gpu/drm/tilcdc/tilcdc_slave.c |   21 ++++++++++++++++++++-
 3 files changed, 36 insertions(+), 2 deletions(-)