Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1617112

Re: [RFC] [media] imx: assume MEDIA_ENT_F_ATV_DECODER entities output video on pad 1

From Mauro Carvalho Chehab <mchehab@s-opensource.com>
Newsgroups linux.kernel
Subject Re: [RFC] [media] imx: assume MEDIA_ENT_F_ATV_DECODER entities output video on pad 1
Date 2017-04-05 18:20 +0200
Message-ID <tsVP4-4TK-19@gated-at.bofh.it> (permalink)
References (5 earlier) <tsHj3-3Oe-3@gated-at.bofh.it> <tsOue-bB-23@gated-at.bofh.it> <tsPzX-Ri-1@gated-at.bofh.it> <tsUzD-3Vt-1@gated-at.bofh.it> <tsVm2-4tM-15@gated-at.bofh.it>
Organization Samsung

Show all headers | View raw

Em Wed, 5 Apr 2017 11:39:06 -0400
Devin Heitmueller <dheitmueller@kernellabs.com> escreveu:

> > Currently, the driver doesn't support (2), because, at the time
> > I wrote the driver, I didn't find a way to read the interrupts generated
> > by tvp5150 at em28xx[1], due to the lack of em28xx documentation,
> > but adding support for it shoudn't be hard. I may eventually do it
> > when I have some time to play with my ISEE hardware.  
> 
> For what it's worth, I doubt most of the em28xx designs have the
> tvp5150 interrupt request line connected in any way.

True. But, on embedded hardware, such line may be connected into the
SoC. Actually, from the IGEPv3 expansion diagram:

	https://www.isee.biz/support/downloads/item/igepv2-expansion-rc-schematics

The INT line is connected to CAM_IRQ. That's connected to GPIO_154 pin
at OMAP3.

So, on a first glance, it seems possible to use it, instead of polling.

> You would likely
> have to poll the FIFO status register via I2C,

Yes, I considered this option when I wrote the driver. It could work, 
although it would likely have some performance drawback, as the driver
would need to poll it at least 60 times per second.

> or use the feature to
> embed the sliced data into as VANC data in the 656 output (as
> described in sec 3.9 of the tvp5150am1 spec).

True, but the bridge driver would need to handle such data. 

I remember I looked on this when I wrote the driver, but I was
unable to find a way for em28xx to parse (or forward) such
data packets.

Thanks,
Mauro

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH v6 00/39] i.MX Media Driver Steve Longerbeam <slongerbeam@gmail.com> - 2017-03-28 02:50 +0200
  [PATCH v6 28/39] media: imx: csi: fix crop rectangle changes in set_fmt Steve Longerbeam <slongerbeam@gmail.com> - 2017-03-28 02:50 +0200
  [PATCH v6 10/39] ARM: dts: imx6-sabreauto: create i2cmux for i2c3 Steve Longerbeam <slongerbeam@gmail.com> - 2017-03-28 02:50 +0200
  [PATCH v6 37/39] media: imx-csi: add frame size/interval enumeration Steve Longerbeam <slongerbeam@gmail.com> - 2017-03-28 02:50 +0200
  [PATCH v6 11/39] ARM: dts: imx6-sabreauto: add reset-gpios property for max7310_b Steve Longerbeam <slongerbeam@gmail.com> - 2017-03-28 02:50 +0200
  [PATCH v6 21/39] media: imx: Add CSI subdev driver Steve Longerbeam <slongerbeam@gmail.com> - 2017-03-28 02:50 +0200
    [PATCH] [media] imx: csi: retain current field order and  colorimetry setting as default Philipp Zabel <p.zabel@pengutronix.de> - 2017-04-06 16:00 +0200
      Re: [PATCH] [media] imx: csi: retain current field order and  colorimetry setting as default Russell King - ARM Linux <linux@armlinux.org.uk> - 2017-04-06 16:10 +0200
        Re: [PATCH] [media] imx: csi: retain current field order and  colorimetry setting as default Philipp Zabel <p.zabel@pengutronix.de> - 2017-04-06 17:10 +0200
          Re: [PATCH] [media] imx: csi: retain current field order and  colorimetry setting as default Russell King - ARM Linux <linux@armlinux.org.uk> - 2017-04-06 17:20 +0200
            Re: [PATCH] [media] imx: csi: retain current field order and  colorimetry setting as default Philipp Zabel <p.zabel@pengutronix.de> - 2017-04-06 17:30 +0200
      Re: [PATCH] [media] imx: csi: retain current field order and  colorimetry setting as default Hans Verkuil <hverkuil@xs4all.nl> - 2017-04-06 16:30 +0200
        Re: [PATCH] [media] imx: csi: retain current field order and  colorimetry setting as default Russell King - ARM Linux <linux@armlinux.org.uk> - 2017-04-06 16:50 +0200
        Re: [PATCH] [media] imx: csi: retain current field order and  colorimetry setting as default Philipp Zabel <p.zabel@pengutronix.de> - 2017-04-06 17:00 +0200
          Re: [PATCH] [media] imx: csi: retain current field order and  colorimetry setting as default Hans Verkuil <hverkuil@xs4all.nl> - 2017-04-06 17:50 +0200
            Re: [PATCH] [media] imx: csi: retain current field order and  colorimetry setting as default Philipp Zabel <p.zabel@pengutronix.de> - 2017-04-06 18:10 +0200
        Re: [PATCH] [media] imx: csi: retain current field order and  colorimetry setting as default Philipp Zabel <p.zabel@pengutronix.de> - 2017-04-06 17:20 +0200
  [PATCH v6 01/39] [media] dt-bindings: Add bindings for video-multiplexer device Steve Longerbeam <slongerbeam@gmail.com> - 2017-03-28 02:50 +0200
    Re: [PATCH v6 01/39] [media] dt-bindings: Add bindings for  video-multiplexer device Rob Herring <robh@kernel.org> - 2017-04-03 16:20 +0200
  [PATCH v6 06/39] ARM: dts: imx6qdl: add capture-subsystem device Steve Longerbeam <slongerbeam@gmail.com> - 2017-03-28 02:50 +0200
  [PATCH v6 25/39] ARM: imx_v6_v7_defconfig: Enable staging video4linux drivers Steve Longerbeam <slongerbeam@gmail.com> - 2017-03-28 02:50 +0200
  [PATCH v6 05/39] ARM: dts: imx6qdl: Add mipi_ipu1/2 multiplexers, mipi_csi, and their connections Steve Longerbeam <slongerbeam@gmail.com> - 2017-03-28 02:50 +0200
  [PATCH v6 04/39] ARM: dts: imx6qdl: Add compatible, clocks, irqs to MIPI CSI-2 node Steve Longerbeam <slongerbeam@gmail.com> - 2017-03-28 03:00 +0200
  [PATCH v6 14/39] add mux and video interface bridge entity functions Steve Longerbeam <slongerbeam@gmail.com> - 2017-03-28 03:00 +0200
  [PATCH v6 15/39] [media] v4l2-mc: add a function to inherit controls from a pipeline Steve Longerbeam <slongerbeam@gmail.com> - 2017-03-28 03:00 +0200
  [PATCH v6 08/39] ARM: dts: imx6-sabrelite: add OV5642 and OV5640 camera sensors Steve Longerbeam <slongerbeam@gmail.com> - 2017-03-28 03:00 +0200
  [PATCH v6 13/39] ARM: dts: imx6-sabreauto: add the ADV7180 video decoder Steve Longerbeam <slongerbeam@gmail.com> - 2017-03-28 03:00 +0200
  [PATCH v6 03/39] [media] dt/bindings: Add bindings for OV5640 Steve Longerbeam <slongerbeam@gmail.com> - 2017-03-28 03:00 +0200
    Re: [PATCH v6 03/39] [media] dt/bindings: Add bindings for OV5640 Rob Herring <robh@kernel.org> - 2017-04-03 16:20 +0200
  [PATCH v6 12/39] ARM: dts: imx6-sabreauto: add pinctrl for gpt input capture Steve Longerbeam <slongerbeam@gmail.com> - 2017-03-28 03:00 +0200
  Re: [PATCH v6 00/39] i.MX Media Driver Russell King - ARM Linux <linux@armlinux.org.uk> - 2017-03-30 13:10 +0200
    Re: [PATCH v6 00/39] i.MX Media Driver Steve Longerbeam <slongerbeam@gmail.com> - 2017-03-30 18:20 +0200
      Re: [PATCH v6 00/39] i.MX Media Driver Russell King - ARM Linux <linux@armlinux.org.uk> - 2017-03-30 18:30 +0200
  [RFC] [media] imx: assume MEDIA_ENT_F_ATV_DECODER entities output  video on pad 1 Philipp Zabel <p.zabel@pengutronix.de> - 2017-03-30 19:30 +0200
    Re: [RFC] [media] imx: assume MEDIA_ENT_F_ATV_DECODER entities output  video on pad 1 Steve Longerbeam <slongerbeam@gmail.com> - 2017-04-05 00:20 +0200
      Re: [RFC] [media] imx: assume MEDIA_ENT_F_ATV_DECODER entities  output video on pad 1 Philipp Zabel <p.zabel@pengutronix.de> - 2017-04-05 11:50 +0200
    Re: [RFC] [media] imx: assume MEDIA_ENT_F_ATV_DECODER entities  output video on pad 1 Russell King - ARM Linux <linux@armlinux.org.uk> - 2017-04-05 01:20 +0200
      Re: [RFC] [media] imx: assume MEDIA_ENT_F_ATV_DECODER entities output  video on pad 1 Steve Longerbeam <slongerbeam@gmail.com> - 2017-04-05 02:50 +0200
        Re: [RFC] [media] imx: assume MEDIA_ENT_F_ATV_DECODER entities  output video on pad 1 Russell King - ARM Linux <linux@armlinux.org.uk> - 2017-04-05 10:30 +0200
          Re: [RFC] [media] imx: assume MEDIA_ENT_F_ATV_DECODER entities  output video on pad 1 Philipp Zabel <p.zabel@pengutronix.de> - 2017-04-05 11:40 +0200
            Re: [RFC] [media] imx: assume MEDIA_ENT_F_ATV_DECODER entities output  video on pad 1 Javier Martinez Canillas <javier@dowhile0.org> - 2017-04-05 16:00 +0200
            Re: [RFC] [media] imx: assume MEDIA_ENT_F_ATV_DECODER entities  output video on pad 1 Mauro Carvalho Chehab <mchehab@s-opensource.com> - 2017-04-05 17:00 +0200
              Re: [RFC] [media] imx: assume MEDIA_ENT_F_ATV_DECODER entities output  video on pad 1 Devin Heitmueller <dheitmueller@kernellabs.com> - 2017-04-05 17:50 +0200
                Re: [RFC] [media] imx: assume MEDIA_ENT_F_ATV_DECODER entities  output video on pad 1 Mauro Carvalho Chehab <mchehab@s-opensource.com> - 2017-04-05 18:20 +0200
                Re: [RFC] [media] imx: assume MEDIA_ENT_F_ATV_DECODER entities output  video on pad 1 Devin Heitmueller <dheitmueller@kernellabs.com> - 2017-04-05 19:10 +0200
                Re: [RFC] [media] imx: assume MEDIA_ENT_F_ATV_DECODER entities  output video on pad 1 Mauro Carvalho Chehab <mchehab@s-opensource.com> - 2017-04-05 19:20 +0200
              Re: [RFC] [media] imx: assume MEDIA_ENT_F_ATV_DECODER entities  output video on pad 1 Philipp Zabel <p.zabel@pengutronix.de> - 2017-04-06 12:10 +0200
      Re: [RFC] [media] imx: assume MEDIA_ENT_F_ATV_DECODER entities output  video on pad 1 Steve Longerbeam <slongerbeam@gmail.com> - 2017-04-05 02:50 +0200
  Re: [PATCH v6 19/39] media: Add i.MX media core driver Pavel Machek <pavel@ucw.cz> - 2017-04-05 13:40 +0200
  Re: [PATCH v6 19/39] media: Add i.MX media core driver Pavel Machek <pavel@ucw.cz> - 2017-04-05 13:40 +0200
  Re: [PATCH v6 19/39] media: Add i.MX media core driver Philipp Zabel <p.zabel@pengutronix.de> - 2017-04-06 11:50 +0200
    Re: [PATCH v6 19/39] media: Add i.MX media core driver Steve Longerbeam <slongerbeam@gmail.com> - 2017-04-07 02:00 +0200

csiph-web