Re: [IGT PATCH] intel_bios_reader: make edp block decode match kernel

[Jani Nikula <jani.nikula@intel.com>]

On Tue, 06 May 2014, Damien Lespiau <damien.lespiau@intel.com> wrote:
> On Tue, May 06, 2014 at 02:27:23PM +0300, Jani Nikula wrote:
>> All the somewhat recent VBT specs and the kernel have different format
>> for the eDP block than what the tool decodes. What the tool does *may*
>> be correct for really old VBT, but I have no specs or other reference to
>> suppor this. Just do what the kernel does, that's what we're interested
>> in anyway.
>> 
>> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
>
> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
>
> You may want to add checks on the VBT revision that introduce the
> different parameters.

I *wanted* to. But the versions in the spec apparently get changed also
when that part about the spec actually hasn't changed. At least my
140-something spec had some of the same stuff that was indicated as
having been added at 150-something. :(

> We're also missing the VswingPreEmphasisValue fields from rev. 173.

Yup, need to be added later (when we actually start using those).

Ok to push?

BR,
Jani.

>
> -- 
> Damien
>
>> ---
>>  tools/intel_bios.h | 5 ++++-
>>  1 file changed, 4 insertions(+), 1 deletion(-)
>> 
>> diff --git a/tools/intel_bios.h b/tools/intel_bios.h
>> index 128502039c66..832c580dd084 100644
>> --- a/tools/intel_bios.h
>> +++ b/tools/intel_bios.h
>> @@ -590,8 +590,11 @@ struct edp_link_params {
>>  struct bdb_edp {
>>  	struct edp_power_seq power_seqs[16];
>>  	uint32_t color_depth;
>> -	uint32_t sdrrs_msa_timing_delay;
>>  	struct edp_link_params link_params[16];
>> +	uint32_t sdrrs_msa_timing_delay;
>> +
>> +	uint16_t edp_s3d_feature;
>> +	uint16_t edp_t3_optimization;
>>  } __attribute__ ((packed));
>>  
>>  /*
>> -- 
>> 1.9.1
>> 
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-- 
Jani Nikula, Intel Open Source Technology Center