Re: [PATCH] drm/i915/psr: Adds psrwake options for all platforms

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

On Wed, 13 Jun 2018, "Nagaraju, Vathsala" <vathsala.nagaraju@intel.com> wrote:
> On 6/12/2018 2:30 PM, Jani Nikula wrote:
>> On Tue, 12 Jun 2018, vathsala nagaraju <vathsala.nagaraju@intel.com> wrote:
>>> From: Vathsala Nagaraju <vathsala.nagaraju@intel.com>
>>>
>>> Adds new psrwake options defined in the below table.
>>> Platform	PSR wake options vbt version
>>> KBL/CFL/WHL	All
>>> SKL		All PV releases (Check for 203+ might help but cannot be foolproof)
>>> BXT		Uses old interpretation.
>>> CNL/ICL+	All
>>> GLK		All
>>>
>>> For SKL, we will continue to use older interpretation for the above reason.
>>>
>>> Cc: Jani Nikula <jani.nikula@intel.com>
>>> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
>>> Cc: Puthikorn Voravootivat <puthik@chromium.org>
>>> Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
>>>
>>> Signed-off-by: Vathsala Nagaraju <vathsala.nagaraju@intel.com>
>>> ---
>>>   drivers/gpu/drm/i915/intel_bios.c | 3 ++-
>>>   1 file changed, 2 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
>>> index 465dff4..010ff68 100644
>>> --- a/drivers/gpu/drm/i915/intel_bios.c
>>> +++ b/drivers/gpu/drm/i915/intel_bios.c
>>> @@ -710,7 +710,8 @@ static int intel_bios_ssc_frequency(struct drm_i915_private *dev_priv,
>>>   	 * New psr options 0=500us, 1=100us, 2=2500us, 3=0us
>>>   	 * Old decimal value is wake up time in multiples of 100 us.
>>>   	 */
>>> -	if (bdb->version >= 209 && IS_GEN9_BC(dev_priv)) {
>>> +	if ((INTEL_GEN(dev_priv) >= 10) ||
>>> +	    (IS_GEN9_BC(dev_priv) && !IS_SKYLAKE(dev_priv))) {
>> Please keep the version check.
> Sure. For SKL , shall we use older interpretation for all bdb version as 
> vbt team cannot confirm bdb version for SKL?

I guess.

BR,
Jani.


>
>> Please tell anyone who asks, and also those who don't, that *all* of the
>> VBT changes should be based on the *version*, and *none* of them should
>> be based on the *platform*.
>>
>> BR,
>> Jani.
>>
>>>   		switch (psr_table->tp1_wakeup_time) {
>>>   		case 0:
>>>   			dev_priv->vbt.psr.tp1_wakeup_time_us = 500;
>

-- 
Jani Nikula, Intel Open Source Graphics Center
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