[Intel-gfx] Request for feedback : New Panel-fitter property for connectors

[Ville Syrjälä]

On Wed, Feb 19, 2014 at 09:33:11AM +0000, Goel, Akash wrote:
> Thanks for your inputs.
> 
> Actually for our use cases, the 'scaling_mode' property currently being used for 'lvds' & 'dp', cannot be used as it is.
> 
> For our use cases, we need to provide a fine level control to User, so as to be able to choose the LetterBox/Pillar-box modes & also the Manual mode with horizontal & vertical scaling ratios.
> 
> Please provide suggestions, that how we can extend/reuse the 'scaling_mode' property here. 

My plan is to somehow expose the panel fitter input and output sizes
explicitly at some point. The output size could be expose by adding
borders to the display mode structure (or some border properties if we
don't want to change the user visible mode struct). And the input size
could also be done via properties.

>  
> Best regards
> Akash
> 
> -----Original Message-----
> From: Chris Wilson [mailto:chris at chris-wilson.co.uk] 
> Sent: Wednesday, February 19, 2014 1:58 PM
> To: Goel, Akash
> Cc: intel-gfx at lists.freedesktop.org
> Subject: Re: [Intel-gfx] Request for feedback : New Panel-fitter property for connectors
> 
> On Wed, Feb 19, 2014 at 06:13:53AM +0000, Goel, Akash wrote:
> > 
> > Hello, 
> > 
> > We are planning to expose a new panel fitter property for the connectors. 
> > We have some use cases like a full screen video playback, where we can flip the frame buffer of any size irrespective of the pipe timings and enable the panel fitter to do scaling instead of using the GPU. 
> > Other use case is the Clone mode, where we can use the composed output of the LFP on the external display, with panel fitter enabled, to avoid GPU composition.
> > 
> > Please provide inputs/comments on the same.
> > 
> > Best regards
> > Akash
> > 
> > -----Original Message-----
> > From: Goel, Akash 
> > Sent: Tuesday, February 18, 2014 4:12 PM
> > To: intel-gfx at lists.freedesktop.org
> > Cc: Goel, Akash; G, Pallavi
> > Subject: [PATCH] drm/i915: Added a new Panel-fitter property for connectors
> > 
> > From: Akash Goel <akash.goel at intel.com>
> > 
> > Added a Panel-fitter enable/disable property support for the connectors.
> 
> You are missing why you cannot reuse the connector property "scaling".
> -Chris
> 
> -- 
> Chris Wilson, Intel Open Source Technology Centre
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-- 
Ville Syrjälä
Intel OTC