Dynamic Media Refresh Rate Switching

[BTsen4]

Is there any web link or document to define the Dynamic Media Refresh Rate Switching (DMRRS) ? Thanks.

[CarlosAM_INTEL]

Hello, bill_tseng:

Thank you for contacting Intel Embedded Community.

The Dynamic Media Refresh Rate Switching (DMRRS) information is stated in section 5.3 and Table 19-2; on pages 25, 26, and 70 of the https://cdrdv2.intel.com/v1/dl/getContent/574274 Intel Graphics Power Management and Power Conservation Software Product Specification (SPS) document # 574274.

It is accessible when you are logged into your Resource & Design Center (RDC) privileged account. It can be requested by filling out the https://www.intel.com/content/www/us/en/forms/design/contact-support.html RDC Account Support form.

We hope that this information may help you.

Best regards,

Carlos_A.

[BTsen4]

Hello, Carlos A:

Thanks for your prompt feedback. It helps a lot.

It seems DMRRS is similar to the concept of Seamless DRRS. The difference between DMRRS and DRRS is DRRS only focus on the static picture.

For the Seamless DRRS, it mentioned "The seamless DRRS method is able to accomplish the refresh rate assignment without a mode change and therefore does not experience some of the visual artifacts ...".

Does Intel have the document that describes the method of Seamless DRRS changes the refresh rate without a mode change ?

Best Regards,

Bill_Tseng

[CarlosAM_INTEL]

Hello, bill_tseng :

Thanks for your reply.

The information that may help you is stated as a reference in section 4.6.7, on page 67 of the https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/mobile-5th-gen-core-family-datasheet-vol-1.pdf Mobile 5th Generation Intel(R) Core(TM) Processor Family Datasheet – Volume 1 of 2 document # 332378.

We hope that this information may help you.

Best regards,

Carlos_A.

[StephenCS]

Hello Carlos_A

if DRRS is disable, the DMRRS also be disable automatically. Is it correct?

Thanks,

Stephen

[CarlosAM_INTEL]

Hello, @StephenCS:

Thank you for contacting Intel Embedded Community.

We want to address the following question to help you:

Could you please let us know the part numbers of the Intel devices related to this question?

We are waiting for your answer.

Best regards,

@CarlosAM_INTEL.

[kushal1]

Hello Carlos_A

Can you prove any specification for the timing details regarding these following intel specific features in eDP

LRR, LRR1.0, LRR2.0, LRR2.5, ALRR,UBRR, SDRRS, DMRRS, DPST

Thanks,

kushal1

[Diego_INTEL]

Hello @kushal1,

Thank you for contacting Intel Embedded Community.

What processor and chipset are you using?

Best regards,

@Diego_INTEL 

[kushal1]

Hello @Diego_INTEL 

I am working on eDP 1.5 Power Saving, so these are some intel specific features for power saving in eDP 

LRR, LRR1.0, LRR2.0, LRR2.5, ALRR,UBRR, SDRRS, DMRRS, DPST.

Can you help me to get the timing related documentation for these features.  

Thanks,

kushal1

[Diego_INTEL]

Hello @kushal1,

I have found some documents that have information regarding those features:

#600548 - Intel® Graphics Advanced Display Features

Low Refresh Rate (LRR) Feature

#619433 -  Intel® Graphics Power Management and Power Conservation - Software Product Specification (SPS)

This one has a lot of information regarding various features that you mentioned.

You will need a Premier account in order to get access to these documents.

Best regards,

@Diego_INTEL 

[kushal1]

Hello @Diego_INTEL 

Thanks for your response. Its very helpful.

Thanks,

kushal1

[Diego_INTEL]

Hello @kushal1,

You are very welcome.

Best regards,

@Diego_INTEL