Patch for the atmel-hlcdc driver: Change pixel clock divider settings to resolve incorrect clock output and reduce rounding to prevent clocking out of range.

Add support for the TDA19988 HDMI transmitter and possibly other component based DRM drivers. Added device tree options to enable required timing changes. The idea is based on the tilcdc driver. DRM panels and bridges should still work with atmel-hlcdc, but this should be tested as I only have hardware using the TDA19988.

This patch makes the atmel-hlcdc driver work with the tda998x, without rewriting that driver to a DRM bridge.

The following changes since commit 59cb7cbaa777e0fbbff07bb084052bec2edb672f:

Merge branch 'at91-4.4-trunk/dt' into linux-4.4-at91 (2016-11-21 14:09:50 +0100)

are available in the git repository at:

https://github.com/hupster/linux-at91.git linux-4.4-at91-upstream-drm

for you to fetch changes up to 3370fe041c646d2bc1941529e9cdf543e627085c:

drm/atmel-hlcdc: use drm component API to access tda998x driver (2016-11-23 18:00:37 +0100)

---------------------------------------------------------------- hupster (6): drm/i2c/tda998x: drm fixes from upstream drm/i2c/tda998x: add connector display_info drm/atmel-hlcdc: add device tree options for vesa sync and clock polarity drm/atmel-hlcdc: reduce rounding in pixel clock divider drm/atmel-hlcdc: fix CLKPOL bit causing incorrect pixel clock output drm/atmel-hlcdc: use drm component API to access tda998x driver

drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c | 76 +++++++++++++++++++++++++++++++++++++------------- drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 113 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------------- drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h | 5 ++++ drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c | 35 +++++++++++++++++++++++ drivers/gpu/drm/i2c/tda998x_drv.c | 28 ++++++++++++++++--- 5 files changed, 215 insertions(+), 42 deletions(-)