Hi Kieran,
On Tuesday, 17 July 2018 19:08:44 EEST Kieran Bingham wrote:
> On 17/07/18 13:52, Laurent Pinchart wrote:
> > On Monday, 16 July 2018 21:21:00 EEST Kieran Bingham wrote:
> >> On 24/05/18 13:51, Laurent Pinchart wrote:
> >>> On Thursday, 3 May 2018 16:36:21 EEST Kieran Bingham wrote:
> >>>> Calculate the top and bottom fields for the interlaced frames and
> >>>> utilise the extended display list command feature to implement the
> >>>> auto-field operations. This allows the DU to update the VSP2 registers
> >>>> dynamically based upon the currently processing field.
> >>>>
> >>>> Signed-off-by: Kieran Bingham <kieran.bingham+rene...@ideasonboard.com>
> >>>>
> >>>> ---
> >>>>
> >>>> v3:
> >>>> - Pass DL through partition calls to allow autocmd's to be retrieved
> >>>> - Document interlaced field in struct vsp1_du_atomic_config
> >>>>
> >>>> v2:
> >>>> - fix erroneous BIT value which enabled interlaced
> >>>> - fix field handling at frame_end interrupt
> >>>>
> >>>> ---
> >>>>
> >>>> drivers/media/platform/vsp1/vsp1_dl.c | 10 ++++-
> >>>> drivers/media/platform/vsp1/vsp1_drm.c | 11 ++++-
> >>>> drivers/media/platform/vsp1/vsp1_regs.h | 1 +-
> >>>> drivers/media/platform/vsp1/vsp1_rpf.c | 71 ++++++++++++++++++++++--
> >>>> drivers/media/platform/vsp1/vsp1_rwpf.h | 1 +-
> >>>> include/media/vsp1.h | 2 +-
> >>>> 6 files changed, 93 insertions(+), 3 deletions(-)
> >
> > [snip]
> >
> >>>> diff --git a/drivers/media/platform/vsp1/vsp1_drm.c
> >>>> b/drivers/media/platform/vsp1/vsp1_drm.c index
> >>>> 2c3db8b8adce..cc29c9d96bb7
> >>>> 100644
> >>>> --- a/drivers/media/platform/vsp1/vsp1_drm.c
> >>>> +++ b/drivers/media/platform/vsp1/vsp1_drm.c
> >>>> @@ -811,6 +811,17 @@ int vsp1_du_atomic_update(struct device *dev,
> >>>> unsigned int pipe_index,
> >>>> return -EINVAL;
> >>>> }
> >>>>
> >>>> + if (!(vsp1_feature(vsp1, VSP1_HAS_EXT_DL)) && cfg->interlaced) {
> >>>
> >>> Nitpicking, writing the condition as
> >>>
> >>> if (cfg->interlaced && !(vsp1_feature(vsp1, VSP1_HAS_EXT_DL)))
> >>
> >> Done.
> >>
> >>> would match the comment better. You can also drop the parentheses around
> >>> the vsp1_feature() call.
> >>>
> >>>> + /*
> >>>> + * Interlaced support requires extended display lists to
> >>>> + * provide the auto-fld feature with the DU.
> >>>> + */
> >>>> + dev_dbg(vsp1->dev, "Interlaced unsupported on this
> >>>> output\n");
> >>>
> >>> Could we catch this in the DU driver to fail atomic test ?
> >>
> >> Ugh - I thought moving the configuration to vsp1_du_setup_lif() would
> >> give us this, but that return value is not checked in the DU.
> >>
> >> How can we interogate the VSP1 to ask it if it supports interlaced from
> >> rcar_du_vsp_plane_atomic_check()?
> >>
> >> Some dummy call to vsp1_du_setup_lif() to check the return value ? Or
> >> should we implement a hook to call through to perform checks in the VSP1
> >> DRM API?
> >
> > Would it be possible to just infer that from the DU compatible string,
> > without querying the VSP driver ? Of course that's a bit of a layering
> > violation, but as we know what type of VSP instance is present in each
> > SoC, such a small hack wouldn't hurt in my opinion. If the need arises
> > later we can introduce an API to query the information from the VSP
> > driver.
>
> I'm not sure what there is to match on currently.
>
> I thought that we had restrictions on which display pipelines supported
> interlaced. (i.e. D3/E3 might not) - but they seem to support extended
> display lists ...
>
> So isn't it the case that any pipeline which we connect to DRM supports
> interlaced? (currently) - we can't / don't physically connect other VSP
> entities to the DRM pipes...
I haven't checked, but if you think that's the case, I'll trust you :-)
> >>>> + return -EINVAL;
> >>>> + }
> >>>> +
> >>>> + rpf->interlaced = cfg->interlaced;
> >>>> +
> >>>> rpf->fmtinfo = fmtinfo;
> >>>> rpf->format.num_planes = fmtinfo->planes;
> >>>> rpf->format.plane_fmt[0].bytesperline = cfg->pitch;
> >
> > [snip]
--
Regards,
Laurent Pinchart
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