Re: [PATCHv5 00/11] video/exynos/sti/cec: add CEC notifier & use in drivers

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On Wed, Mar 29, 2017 at 09:59:34PM +0200, Hans Verkuil wrote:
> Hi Daniel,
> 
> On 29/03/17 19:47, Daniel Vetter wrote:
> > On Wed, Mar 29, 2017 at 04:15:32PM +0200, Hans Verkuil wrote:
> >> From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
> >>
> >> This patch series adds the CEC physical address notifier code, based on
> >> Russell's code:
> >>
> >> https://patchwork.kernel.org/patch/9277043/
> >>
> >> It adds support for it to the exynos_hdmi drm driver, adds support for
> >> it to the CEC framework and finally adds support to the s5p-cec driver,
> >> which now can be moved out of staging.
> >>
> >> Also included is similar code for the STI platform, contributed by
> >> Benjamin Gaignard.
> >>
> >> Tested the exynos code with my Odroid U3 exynos4 devboard.
> >>
> >> After discussions with Daniel Vetter and Russell King I have removed
> >> the EDID/ELD/HPD connect/disconnect events from the notifier and now
> >> just use it to report the CEC physical address. This also means that
> >> it is now renamed to CEC notifier instead of HPD notifier and that
> >> it is now in drivers/media. The block_notifier was dropped as well
> >> and instead a simple callback is registered. This means that the
> >> relationship between HDMI and CEC is now 1:1 and no longer 1:n, but
> >> should this be needed in the future, then that can easily be added
> >> back.
> >>
> >> Daniel, regarding your suggestions here:
> >>
> >> http://www.spinics.net/lists/dri-devel/msg133907.html
> >>
> >> this patch series maps to your mail above as follows:
> >>
> >> struct cec_pin == struct cec_notifier
> >> cec_(un)register_pin == cec_notifier_get/put
> >> cec_set_address == cec_notifier_set_phys_addr
> >> cec_(un)register_callbacks == cec_notifier_(un)register
> >>
> >> Comments are welcome. I'd like to get this in for the 4.12 kernel as
> >> this is a missing piece needed to integrate CEC drivers.
> >>
> >> Regards,
> >>
> >> 	Hans
> >>
> >> Changes since v4:
> >> - Dropped EDID/ELD/connect/disconnect support. Instead, just report the
> >>   CEC physical address (and use INVALID when disconnecting).
> >> - Since this is now completely CEC specific, move it to drivers/media
> >>   and rename to cec-notifier.
> >> - Drop block_notifier. Instead just set a callback for the notifier.
> >> - Use 'hdmi-phandle' in the bindings for both exynos and sti. So no
> >>   vendor prefix and 'hdmi-phandle' instead of 'hdmi-handle'.
> >> - Make struct cec_notifier opaque. Add a helper function to get the
> >>   physical address from a cec_notifier struct.
> >> - Provide dummy functions in cec-notifier.h so it can be used when
> >>   CONFIG_MEDIA_CEC_NOTIFIER is undefined.
> >> - Don't select the CEC notifier in the HDMI drivers. It should only
> >>   be enabled by actual CEC drivers.
> > 
> > I just quickly scaned through it, but this seems to address all my
> > concerns fully. Thanks for respinning. On the entire pile (or just the
> > core cec notifier bits):
> > 
> > Acked-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
> 
> Fantastic! Thank you very much for your comments.
> 
> One last question: the patches for drivers/gpu/drm: can they go through
> the media subsystem or do you want to take them? They do depend on the first
> two patches of this series (cec-edid and cec-notifier), so it is a bit more
> coordination if they have to go through the drm subsystem.

Doesn't seem to touch anything where I expect conflicts, so as long as it
shows up in linux-next timely I think that's good. Please poke driver
maintainers for their ack though, but if they fail to respond within a few
days you can take my ack for merging the entire pile through media.

Cheers, Daniel

> 
> Regards,
> 
> 	Hans
> 
> > 
> >>
> >> Changes since v3:
> >> - Added the STI patches
> >> - Split the exynos4 binding patches in one for documentation and one
> >>   for the dts change itself, also use the correct subject and CC to
> >>   the correct mailinglists (I hope  )
> >>
> >> Changes since v2:
> >> - Split off the dts changes of the s5p-cec patch into a separate patch
> >> - Renamed HPD_NOTIFIERS to HPD_NOTIFIER to be consistent with the name
> >>   of the source.
> >>
> >> Changes since v1:
> >>
> >> Renamed HDMI notifier to HPD (hotplug detect) notifier since this code is
> >> not HDMI specific, but is interesting for any video source that has to
> >> deal with hotplug detect and EDID/ELD (HDMI, DVI, VGA, DP, ....).
> >> Only the use with CEC adapters is HDMI specific, but the HPD notifier
> >> is more generic.
> >>
> >>
> >>
> >>
> >> Benjamin Gaignard (4):
> >>   sti: hdmi: add CEC notifier support
> >>   stih-cec.txt: document new hdmi phandle
> >>   stih-cec: add CEC notifier support
> >>   arm: sti: update sti-cec for CEC notifier support
> >>
> >> Hans Verkuil (7):
> >>   cec-edid: rename cec_get_edid_phys_addr
> >>   media: add CEC notifier support
> >>   cec: integrate CEC notifier support
> >>   exynos_hdmi: add CEC notifier support
> >>   ARM: dts: exynos: add HDMI controller phandle to exynos4.dtsi
> >>   s5p-cec.txt: document the HDMI controller phandle
> >>   s5p-cec: add cec-notifier support, move out of staging
> >>
> >>  .../devicetree/bindings/media/s5p-cec.txt          |   2 +
> >>  .../devicetree/bindings/media/stih-cec.txt         |   2 +
> >>  MAINTAINERS                                        |   4 +-
> >>  arch/arm/boot/dts/exynos4.dtsi                     |   1 +
> >>  arch/arm/boot/dts/stih407-family.dtsi              |  12 ---
> >>  arch/arm/boot/dts/stih410.dtsi                     |  13 +++
> >>  drivers/gpu/drm/exynos/exynos_hdmi.c               |  20 +++-
> >>  drivers/gpu/drm/sti/sti_hdmi.c                     |  11 ++
> >>  drivers/gpu/drm/sti/sti_hdmi.h                     |   3 +
> >>  drivers/media/Kconfig                              |   3 +
> >>  drivers/media/Makefile                             |   4 +
> >>  drivers/media/cec-edid.c                           |  15 ++-
> >>  drivers/media/cec-notifier.c                       | 116 +++++++++++++++++++++
> >>  drivers/media/cec/cec-core.c                       |  21 ++++
> >>  drivers/media/i2c/adv7511.c                        |   5 +-
> >>  drivers/media/i2c/adv7604.c                        |   3 +-
> >>  drivers/media/i2c/adv7842.c                        |   2 +-
> >>  drivers/media/platform/Kconfig                     |  28 +++++
> >>  drivers/media/platform/Makefile                    |   2 +
> >>  .../media => media/platform}/s5p-cec/Makefile      |   0
> >>  .../platform}/s5p-cec/exynos_hdmi_cec.h            |   0
> >>  .../platform}/s5p-cec/exynos_hdmi_cecctrl.c        |   0
> >>  .../media => media/platform}/s5p-cec/regs-cec.h    |   0
> >>  .../media => media/platform}/s5p-cec/s5p_cec.c     |  35 ++++++-
> >>  .../media => media/platform}/s5p-cec/s5p_cec.h     |   3 +
> >>  .../st-cec => media/platform/sti/cec}/Makefile     |   0
> >>  .../st-cec => media/platform/sti/cec}/stih-cec.c   |  31 +++++-
> >>  drivers/media/platform/vivid/vivid-vid-cap.c       |   3 +-
> >>  drivers/staging/media/Kconfig                      |   4 -
> >>  drivers/staging/media/Makefile                     |   2 -
> >>  drivers/staging/media/s5p-cec/Kconfig              |   9 --
> >>  drivers/staging/media/s5p-cec/TODO                 |   7 --
> >>  drivers/staging/media/st-cec/Kconfig               |   8 --
> >>  drivers/staging/media/st-cec/TODO                  |   7 --
> >>  include/media/cec-edid.h                           |  17 ++-
> >>  include/media/cec-notifier.h                       |  93 +++++++++++++++++
> >>  include/media/cec.h                                |   6 ++
> >>  37 files changed, 421 insertions(+), 71 deletions(-)
> >>  create mode 100644 drivers/media/cec-notifier.c
> >>  rename drivers/{staging/media => media/platform}/s5p-cec/Makefile (100%)
> >>  rename drivers/{staging/media => media/platform}/s5p-cec/exynos_hdmi_cec.h (100%)
> >>  rename drivers/{staging/media => media/platform}/s5p-cec/exynos_hdmi_cecctrl.c (100%)
> >>  rename drivers/{staging/media => media/platform}/s5p-cec/regs-cec.h (100%)
> >>  rename drivers/{staging/media => media/platform}/s5p-cec/s5p_cec.c (89%)
> >>  rename drivers/{staging/media => media/platform}/s5p-cec/s5p_cec.h (97%)
> >>  rename drivers/{staging/media/st-cec => media/platform/sti/cec}/Makefile (100%)
> >>  rename drivers/{staging/media/st-cec => media/platform/sti/cec}/stih-cec.c (93%)
> >>  delete mode 100644 drivers/staging/media/s5p-cec/Kconfig
> >>  delete mode 100644 drivers/staging/media/s5p-cec/TODO
> >>  delete mode 100644 drivers/staging/media/st-cec/Kconfig
> >>  delete mode 100644 drivers/staging/media/st-cec/TODO
> >>  create mode 100644 include/media/cec-notifier.h
> >>
> >> -- 
> >> 2.11.0
> >>
> >> _______________________________________________
> >> dri-devel mailing list
> >> dri-devel@xxxxxxxxxxxxxxxxxxxxx
> >> https://lists.freedesktop.org/mailman/listinfo/dri-devel
> > 
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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