[PATCH v7 00/34] i.MX Media Driver
Philipp Zabel
p.zabel at pengutronix.de
Mon May 29 07:15:46 PDT 2017
On Mon, 2017-05-29 at 15:46 +0200, Hans Verkuil wrote:
> Hi Steve,
>
> On 05/25/2017 02:29 AM, Steve Longerbeam wrote:
> > In version 7:
> >
> > - video-mux: switched to Philipp's latest video-mux driver and updated
> > bindings docs, that makes use of the mmio-mux framework.
> >
> > - mmio-mux: includes Philipp's temporary patch that adds mmio-mux support
> > to video-mux driver, until mux framework is merged.
> >
> > - mmio-mux: updates to device tree from Philipp that define the i.MX6 mux
> > devices and modifies the video-mux device to become a consumer of the
> > video mmio-mux.
> >
> > - minor updates to Documentation/media/v4l-drivers/imx.rst.
> >
> > - ov5640: do nothing if entity stream count is greater than 1 in
> > ov5640_s_stream().
> >
> > - Previous versions of this driver had not tested the ability to enable
> > multiple independent streams, for instance enabling multiple output
> > pads from the imx6-mipi-csi2 subdevice, or enabling both prpenc and
> > prpvf outputs. Marek Vasut tested this support and reported issues
> > with it.
> >
> > v4l2_pipeline_inherit_controls() used the media graph walk APIs, but
> > that walks both sink and source pads, so if there are multiple paths
> > enabled to video capture devices, controls would be added to the wrong
> > video capture device, and no controls added to the other enabled
> > capture devices.
> >
> > These issues have been fixed. Control inheritance works correctly now
> > even with multiple enabled capture paths, and (for example)
> > simultaneous capture from prpenc and prpvf works also, and each with
> > independent scaling, CSC, and controls. For example prpenc can be
> > capturing with a 90 degree rotation, while prpvf is capturing with
> > vertical flip.
> >
> > So the v4l2_pipeline_inherit_controls() patch has been dropped. The
> > new version of control inheritance could be made generically available,
> > but it would be more involved to incorporate it into v4l2-core.
> >
> > - A new function imx_media_fill_default_mbus_fields() is added to setup
> > colorimetry at sink pads, and these are propagated to source pads.
> >
> > - Ensure that the current sink and source rectangles meet alignment
> > restrictions before applying a new rotation control setting in
> > prp-enc/vf subdevices.
> >
> > - Chain the s_stream() subdev calls instead of implementing a custom
> > stream on/off function that attempts to call a fixed set of subdevices
> > in a pipeline in the correct order. This also simplifies imx6-mipi-csi2
> > subdevice, since the correct MIPI CSI-2 startup sequence can be
> > enforced completely in s_stream(), and s_power() is no longer
> > required. This also paves the way for more arbitrary OF graphs
> > external to the i.MX6.
> >
> > - Converted the v4l2_subdev and media_entity ops structures to const.
>
> What is the status as of v7?
>
> From what I can tell patch 2/34 needs an Ack from Rob Herring, patches
> 4-14 are out of scope for the media subsystem, patches 20-25 and 27-34
> are all staging (so fine to be merged from my point of view).
>
> I'm not sure if patch 26 (defconfig) should be applied while the imx
> driver is in staging. I would suggest that this patch is moved to the end
> of the series.
>
> That leaves patches 15-19. I replied to patch 15 with a comment, patches
> 16-18 look good to me, although patches 17 and 18 should be combined to one
> patch since patch 17 won't compile otherwise.
Is this a problem? It won't break any builds as patch 17 depends on
CONFIG_MULTIPLEXER, which doesn't exist yet. I'm fine with merging the
two patches, though.
> Any idea when the multiplexer is expected to be merged? (just curious)
I have no idea. v15 of the multiplexer framework patchset was posted on
2017-05-14, is still waiting for comments.
> I would really like to get this merged for 4.13, so did I miss anything?
Seconded, and not that I can tell.
> From what I can tell it is really just an Ack for patch 2/34.
regards
Philipp
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