linux-kernel - Re: [PATCH v2 0/5] Add ChromeOS EC CEC Support

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Message-ID: <9783145b-7126-9f8e-bd23-61da6adf7a7d@baylibre.com>
Date:   Mon, 21 May 2018 11:02:22 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Enric Balletbo Serra <eballetbo@...il.com>
Cc:     David Airlie <airlied@...ux.ie>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Lee Jones <lee.jones@...aro.org>,
        Olof Johansson <olof@...om.net>,
        Sean Paul <seanpaul@...gle.com>, sadolfsson@...gle.com,
        Felix Ekblom <felixe@...gle.com>,
        Benson Leung <bleung@...gle.com>, darekm@...gle.com,
        Stéphane Marchesin <marcheu@...omium.org>,
        Fabien Parent <fparent@...libre.com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-media@...r.kernel.org, intel-gfx@...ts.freedesktop.org,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 0/5] Add ChromeOS EC CEC Support

On 18/05/2018 16:04, Enric Balletbo Serra wrote:
> Hi Neil,
> 
> 2018-05-18 15:04 GMT+02:00 Neil Armstrong <narmstrong@...libre.com>:
>> Hi All,
>>
>> The new Google "Fizz" Intel-based ChromeOS device is gaining CEC support
>> through it's Embedded Controller, to enable the Linux CEC Core to communicate
>> with it and get the CEC Physical Address from the correct HDMI Connector, the
>> following must be added/changed:
>> - Add the CEC sub-device registration in the ChromeOS EC MFD Driver
>> - Add the CEC related commands and events definitions into the EC MFD driver
>> - Add a way to get a CEC notifier with it's (optional) connector name
>> - Add the CEC notifier to the i915 HDMI driver
>> - Add the proper ChromeOS EC CEC Driver
>>
>> The CEC notifier with the connector name is the tricky point, since even on
>> Device-Tree platforms, there is no way to distinguish between multiple HDMI
>> connectors from the same DRM driver. The solution I implemented is pretty
>> simple and only adds an optional connector name to eventually distinguish
>> an HDMI connector notifier from another if they share the same device.
>>
>> Feel free to comment this patchset !
>>
>> Changes since v2:
>>  - Add i915 port_identifier() and use this stable name as cec_notifier conn name
>>  - Fixed and cleaned up the CEC commands and events handling
>>  - Rebased the CEC sub-device registration on top of Enric's serie
>>  - Fixed comments typo on cec driver
>>  - Protected the DMI match only with PCI and DMI Kconfigs
>>
> 
> Just because I got confused when I saw two v2 in my inbox. This is v3, right?

Yes, sorry it's v3... next will be v4.

> 
>> Changes since v1:
>>  - Added cec_notifier_put to intel_hdmi
>>  - Fixed all small reported issues on the EC CEC driver
>>  - Moved the cec_notifier_get out of the #if .. #else .. #endif
>>
>> Changes since RFC:
>>  - Moved CEC sub-device registration after CEC commands and events definitions patch
>>  - Removed get_notifier_get_byname
>>  - Added CEC_CORE select into i915 Kconfig
>>  - Removed CEC driver fallback if notifier is not configured on HW, added explicit warn
>>  - Fixed CEC core return type on error
>>  - Moved to cros-ec-cec media platform directory
>>  - Use bus_find_device() to find the pci i915 device instead of get_notifier_get_byname()
>>  - Fix Logical Address setup
>>  - Added comment about HW support
>>  - Removed memset of msg structures
>>
>> Neil Armstrong (5):
>>   media: cec-notifier: Get notifier by device and connector name
>>   drm/i915: hdmi: add CEC notifier to intel_hdmi
>>   mfd: cros-ec: Introduce CEC commands and events definitions.
>>   mfd: cros_ec_dev: Add CEC sub-device registration
>>   media: platform: Add Chrome OS EC CEC driver
>>
>>  drivers/gpu/drm/i915/Kconfig                     |   1 +
>>  drivers/gpu/drm/i915/intel_display.h             |  20 ++
>>  drivers/gpu/drm/i915/intel_drv.h                 |   2 +
>>  drivers/gpu/drm/i915/intel_hdmi.c                |  13 +
>>  drivers/media/cec/cec-notifier.c                 |  11 +-
>>  drivers/media/platform/Kconfig                   |  11 +
>>  drivers/media/platform/Makefile                  |   2 +
>>  drivers/media/platform/cros-ec-cec/Makefile      |   1 +
>>  drivers/media/platform/cros-ec-cec/cros-ec-cec.c | 347 +++++++++++++++++++++++
>>  drivers/mfd/cros_ec_dev.c                        |  16 ++
>>  drivers/platform/chrome/cros_ec_proto.c          |  40 ++-
>>  include/linux/mfd/cros_ec.h                      |   2 +-
>>  include/linux/mfd/cros_ec_commands.h             |  80 ++++++
>>  include/media/cec-notifier.h                     |  27 +-
>>  14 files changed, 557 insertions(+), 16 deletions(-)
>>  create mode 100644 drivers/media/platform/cros-ec-cec/Makefile
>>  create mode 100644 drivers/media/platform/cros-ec-cec/cros-ec-cec.c
>>
>> --
>> 2.7.4
>>