Re: [PATCH 16/21 v2] drm/i915: Ensure setting up scalers into staged crtc_state

["Konduru, Chandra" <chandra.konduru@intel.com>]

> -----Original Message-----
> From: Roper, Matthew D
> Sent: Wednesday, March 25, 2015 10:22 AM
> To: Konduru, Chandra
> Cc: intel-gfx@lists.freedesktop.org; Vetter, Daniel; Conselvan De Oliveira, Ander
> Subject: Re: [PATCH 16/21 v2] drm/i915: Ensure setting up scalers into staged
> crtc_state
> 
> On Fri, Mar 20, 2015 at 05:04:37PM -0700, Chandra Konduru wrote:
> > From intel_atomic_check, call intel_atomic_setup_scalers() to assign
> > scalers based on staged scaling requests. Fail the transaction if
> > setup returns error.
> >
> > Setting up of scalers should be moved to atomic crtc check  once
> > atomic crtc is ready.
> >
> > v2:
> > -updated parameter passing to setup_scalers (me)
> >
> > Signed-off-by: Chandra Konduru <chandra.konduru@intel.com>
> > ---
> >  drivers/gpu/drm/i915/intel_atomic.c |   11 +++++++++++
> >  1 file changed, 11 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_atomic.c
> > b/drivers/gpu/drm/i915/intel_atomic.c
> > index 407516a..73e94c4 100644
> > --- a/drivers/gpu/drm/i915/intel_atomic.c
> > +++ b/drivers/gpu/drm/i915/intel_atomic.c
> > @@ -48,6 +48,8 @@ int intel_atomic_check(struct drm_device *dev,
> >  	int ncrtcs = dev->mode_config.num_crtc;
> >  	int nconnectors = dev->mode_config.num_connector;
> >  	enum pipe nuclear_pipe = INVALID_PIPE;
> > +	struct intel_crtc *nuclear_crtc = NULL;
> > +	struct intel_crtc_state *crtc_state = NULL;
> >  	int ret;
> >  	int i;
> >  	bool not_nuclear = false;
> > @@ -78,6 +80,10 @@ int intel_atomic_check(struct drm_device *dev,
> >  		struct intel_crtc *crtc = to_intel_crtc(state->crtcs[i]);
> >  		if (crtc && crtc->pipe != nuclear_pipe)
> >  			not_nuclear = true;
> > +		if (crtc && crtc->pipe == nuclear_pipe) {
> > +			nuclear_crtc = crtc;
> > +			crtc_state = to_intel_crtc_state(state->crtc_states[i]);
> > +		}
> >  	}
> >  	for (i = 0; i < nconnectors; i++)
> >  		if (state->connectors[i] != NULL)
> > @@ -92,6 +98,11 @@ int intel_atomic_check(struct drm_device *dev,
> >  	if (ret)
> >  		return ret;
> >
> > +	/* FIXME: move to crtc atomic check function once it is ready */
> 
> We can go ahead and add the crtc's atomic_check now.
> drm_atomic_helper_check_planes() will call it if we setup the function pointer.

My understanding is it is not that straight forward after chat with Ander.
So placed it here to make it work while things are inflight.

> 
> 
> Matt
> 
> > +	ret = intel_atomic_setup_scalers(dev, nuclear_crtc, crtc_state);
> > +	if (ret)
> > +		return ret;
> > +
> >  	return ret;
> >  }
> >
> > --
> > 1.7.9.5
> >
> 
> --
> Matt Roper
> Graphics Software Engineer
> IoTG Platform Enabling & Development
> Intel Corporation
> (916) 356-2795
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