[Intel-gfx] [PATCH 0/6] drm/i915: Some FDI related dotclock stuff

[Ville Syrjälä]

On Wed, Feb 17, 2016 at 09:41:07PM +0200, ville.syrjala at linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> Imre's SNB had a crappy BIOS that failed to configure the hardware
> correctly when hooked up to a 4K monitor, which then resulted in
> lots of noise from i915 when it was trying to make sense of the bad
> state. That spurred me to reorganize the FDI dotclock vs. encoder
> dotclock sanity check we have in the encoder .get_config() hooks.
> And while doing that I figured we might as well try to read out
> the actual VGA dotclock via sideband on HSW/BDW, which can then
> be compared to the one compute from FDI parameters.
> 
> Apparently a BIOS update solved the problem for Imre, but I think
> these patches still have some value by adding more thorough state
> cross checking on HSW/BDW, and just moving out the sanity checks
> from the state readout code makes quite a bit of sense to me, 
> especially if we run into more buggy BIOSen. Though if people
> prefer, I could respin these without that particular change,
> ie. just keep the LPT-H dotclock readout and cross checking
> essentially.
> 
> I also ended up fixing the port clock limits for CRT for various
> platforms.
> 
> Ville Syrjälä (6):
>   drm/i915: Dump ddi_pll_sel in hex instead of decimal on HSW/BDW
>   drm/i915: Move the encoder vs. FDI dotclock check out from encoder
>     .get_config()
>   drm/i915: Remove the SPLL==270Mhz assumption from
>     intel_fdi_link_freq()
>   drm/i915: Make the LPT iclkip 20MHz case more generic
>   drm/i915: Read out VGA dotclock properly on LPT
>   drm/i915: Try to fix CRT port clock limits

Entire series pushed to dinq. Thanks for the reviews.

> 
>  drivers/gpu/drm/i915/i915_reg.h      |   8 +-
>  drivers/gpu/drm/i915/intel_crt.c     |  30 ++++----
>  drivers/gpu/drm/i915/intel_display.c | 143 +++++++++++++++++++++++------------
>  drivers/gpu/drm/i915/intel_dp.c      |  11 +--
>  drivers/gpu/drm/i915/intel_drv.h     |   4 +-
>  drivers/gpu/drm/i915/intel_hdmi.c    |   3 -
>  drivers/gpu/drm/i915/intel_lvds.c    |   8 +-
>  drivers/gpu/drm/i915/intel_sdvo.c    |   4 +-
>  8 files changed, 123 insertions(+), 88 deletions(-)
> 
> -- 
> 2.4.10

-- 
Ville Syrjälä
Intel OTC