[PATCH 00/11] drm/sun4i: add CEC support

[Maxime Ripard]

On Thu, Sep 21, 2017 at 09:19:43PM +0000, Hans Verkuil wrote:
> On 21/09/17 22:37, Maxime Ripard wrote:
> > Hi Hans,
> > 
> > On Fri, Sep 08, 2017 at 10:59:44AM +0000, Hans Verkuil wrote:
> >> Hi Maxime,
> >>
> >> On 07/18/17 18:29, Maxime Ripard wrote:
> >>> Hi,
> >>>
> >>> On Tue, Jul 11, 2017 at 11:06:52PM +0200, Hans Verkuil wrote:
> >>>> On 11/07/17 22:39, Maxime Ripard wrote:
> >>>>> On Tue, Jul 11, 2017 at 08:30:33AM +0200, Hans Verkuil wrote:
> >>>>>> From: Hans Verkuil <hans.verkuil at cisco.com>
> >>>>>>
> >>>>>> This patch series adds CEC support for the sun4i HDMI controller.
> >>>>>>
> >>>>>> The CEC hardware support for the A10 is very low-level as it just
> >>>>>> controls the CEC pin. Since I also wanted to support GPIO-based CEC
> >>>>>> hardware most of this patch series is in the CEC framework to
> >>>>>> add a generic low-level CEC pin framework. It is only the final patch
> >>>>>> that adds the sun4i support.
> >>>>>>
> >>>>>> This patch series first makes some small changes in the CEC framework
> >>>>>> (patches 1-4) to prepare for this CEC pin support.
> >>>>>>
> >>>>>> Patch 5-7 adds the new API elements and documents it. Patch 6 reworks
> >>>>>> the CEC core event handling.
> >>>>>>
> >>>>>> Patch 8 adds pin monitoring support (allows userspace to see all
> >>>>>> CEC pin transitions as they happen).
> >>>>>>
> >>>>>> Patch 9 adds the core cec-pin implementation that translates low-level
> >>>>>> pin transitions into valid CEC messages. Basically this does what any
> >>>>>> SoC with a proper CEC hardware implementation does.
> >>>>>>
> >>>>>> Patch 10 documents the cec-pin kAPI (and also the cec-notifier kAPI
> >>>>>> which was missing).
> >>>>>>
> >>>>>> Finally patch 11 adds the actual sun4i_hdmi CEC implementation.
> >>>>>>
> >>>>>> I tested this on my cubieboard. There were no errors at all
> >>>>>> after 126264 calls of 'cec-ctl --give-device-vendor-id' while at the
> >>>>>> same time running a 'make -j4' of the v4l-utils git repository and
> >>>>>> doing a continuous scp to create network traffic.
> >>>>>>
> >>>>>> This patch series is based on top of the mainline kernel as of
> >>>>>> yesterday (so with all the sun4i and cec patches for 4.13 merged).
> >>>>>
> >>>>> For the whole serie:
> >>>>> Reviewed-by: Maxime Ripard <maxime.ripard at free-electrons.com>
> >>>>>
> >>>>>> Maxime, patches 1-10 will go through the media subsystem. How do you
> >>>>>> want to handle the final patch? It can either go through the media
> >>>>>> subsystem as well, or you can sit on it and handle this yourself during
> >>>>>> the 4.14 merge window. Another option is to separate the Kconfig change
> >>>>>> into its own patch. That way you can merge the code changes and only
> >>>>>> have to handle the Kconfig patch as a final change during the merge
> >>>>>> window.
> >>>>>
> >>>>> We'll probably have a number of reworks for 4.14, so it would be
> >>>>> better if I merged it.
> >>>>>
> >>>>> However, I guess if we just switch to a depends on CEC_PIN instead of
> >>>>> a select, everything would just work even if we merge your patches in
> >>>>> a separate tree, right?
> >>>>
> >>>> This small patch will do it:
> >>>>
> >>>> diff --git a/drivers/gpu/drm/sun4i/Kconfig b/drivers/gpu/drm/sun4i/Kconfig
> >>>> index e884d265c0b3..ebad80aefc87 100644
> >>>> --- a/drivers/gpu/drm/sun4i/Kconfig
> >>>> +++ b/drivers/gpu/drm/sun4i/Kconfig
> >>>> @@ -25,7 +25,7 @@ config DRM_SUN4I_HDMI_CEC
> >>>>         bool "Allwinner A10 HDMI CEC Support"
> >>>>         depends on DRM_SUN4I_HDMI
> >>>>         select CEC_CORE
> >>>> -       select CEC_PIN
> >>>> +       depends on CEC_PIN
> >>>>         help
> >>>>  	  Choose this option if you have an Allwinner SoC with an HDMI
> >>>>  	  controller and want to use CEC.
> >>
> >> Just a reminder: now that both this driver and the CEC_PIN code has been
> >> merged in 4.14, this 'depends on' can become a 'select' again.
> > 
> > Thanks for the reminder.
> > 
> > Would that commit work for you:
> > http://code.bulix.org/19o9y6-201254
> 
> Acked-by: Hans Verkuil <hans.verkuil at cisco.com>
> 
> This obviously should be merged for 4.14.

Yep. I just did, thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 801 bytes
Desc: not available
URL: <https://lists.freedesktop.org/archives/dri-devel/attachments/20170922/c539a13b/attachment.sig>