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Subject: Re: [PATCH 00/15] drm/vc4: hdmi: Add CEC support for the BCM2711
To:     Maxime Ripard <maxime@cerno.tech>
Cc:     Eric Anholt <eric@anholt.net>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        Daniel Vetter <daniel.vetter@intel.com>,
        David Airlie <airlied@linux.ie>,
        Jason Cooper <jason@lakedaemon.net>,
        bcm-kernel-feedback-list@broadcom.com,
        linux-arm-kernel@lists.infradead.org,
        Marc Zyngier <maz@kernel.org>, linux-media@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Dave Stevenson <dave.stevenson@raspberrypi.com>,
        linux-rpi-kernel@lists.infradead.org,
        dri-devel@lists.freedesktop.org
References: <20201210134648.272857-1-maxime@cerno.tech>
 <23bdb67a-fb55-42d4-9130-ade1b0396768@xs4all.nl>
 <20201217104946.srurfmuphqzz4c4w@gilmour>
From:   Hans Verkuil <hverkuil-cisco@xs4all.nl>
Message-ID: <cc3e0adf-ba44-7593-40ec-3d2c1efcba02@xs4all.nl>
Date:   Thu, 17 Dec 2020 11:53:42 +0100
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On 17/12/2020 11:49, Maxime Ripard wrote:
> Hi Hans,
> 
> On Wed, Dec 16, 2020 at 01:35:43PM +0100, Hans Verkuil wrote:
>> Hi Maxime,
>>
>> On 10/12/2020 14:46, Maxime Ripard wrote:
>>> Hi,
>>>
>>> Here's a series introducing the CEC support for the BCM2711 found on the
>>> RaspberryPi4.
>>>
>>> The BCM2711 HDMI controller uses a similar layout for the CEC registers, the
>>> main difference being that the interrupt handling part is now shared between
>>> both HDMI controllers.
>>>
>>> This series is mainly about fixing a couple of bugs, reworking the driver to
>>> support having two different interrupts, one for each direction, provided by an
>>> external irqchip, and enables the irqchip driver for the controller we have.
>>>
>>> This has been tested on an RPi3 and RPi4, but requires the latest firmware.
>>> It's is based on the 10 and 12 bpc series.
>>
>> This series looks good to me. Before I give my Acked-by for this series, can you
>> confirm that it is possible to transmit the Image View On message on both outputs
>> of the RPi4 when the HPD is low?
>>
>> See section "CEC Without HPD" in https://hverkuil.home.xs4all.nl/cec-status.txt
>> on how to test this with a Pulse-Eight device.
>>
>> This should work.
> 
> This is the output on the RPi4:
> 
> # cec-ctl --playback
> Driver Info:
> 	Driver Name                : vc4_hdmi
> 	Adapter Name               : vc4
> 	Capabilities               : 0x0000010e
> 		Logical Addresses
> 		Transmit
> 		Passthrough
> 	Driver version             : 5.10.0
> 	Available Logical Addresses: 1
> 	Physical Address           : f.f.f.f
> 	Logical Address Mask       : 0x0000
> 	CEC Version                : 2.0
> 	Vendor ID                  : 0x000c03 (HDMI)
> 	OSD Name                   : Playback
> 	Logical Addresses          : 1 (Allow RC Passthrough)
> 
> 	  Logical Address          : Not Allocated
> 	    Primary Device Type    : Playback
> 	    Logical Address Type   : Playback
> 	    All Device Types       : Playback
> 	    RC TV Profile          : None
> 	    Device Features        :
> 		None
> 
> # cec-ctl -t0 --image-view-on
> Driver Info:
> 	Driver Name                : vc4_hdmi
> 	Adapter Name               : vc4
> 	Capabilities               : 0x0000010e
> 		Logical Addresses
> 		Transmit
> 		Passthrough
> 	Driver version             : 5.10.0
> 	Available Logical Addresses: 1
> 	Physical Address           : f.f.f.f
> 	Logical Address Mask       : 0x0000
> 	CEC Version                : 2.0
> 	Vendor ID                  : 0x000c03 (HDMI)
> 	OSD Name                   : Playback
> 	Logical Addresses          : 1 (Allow RC Passthrough)
> 
> 	  Logical Address          : Not Allocated
> 	    Primary Device Type    : Playback
> 	    Logical Address Type   : Playback
> 	    All Device Types       : Playback
> 	    RC TV Profile          : None
> 	    Device Features        :
> 		None
> 
> 
> Transmit from Unregistered to TV (15 to 0):
> CEC_MSG_IMAGE_VIEW_ON (0x04)
> 	Sequence: 1 Tx Timestamp: 77.631s
> 
> 
> And this is the output on my desktop with the Pulse-Eight:
> $ sudo cec-ctl -p0.0.0.0 --tv
> Driver Info:
> 	Driver Name                : pulse8-cec
> 	Adapter Name               : serio0
> 	Capabilities               : 0x0000003f
> 		Physical Address
> 		Logical Addresses
> 		Transmit
> 		Passthrough
> 		Remote Control Support
> 		Monitor All
> 	Driver version             : 5.9.8
> 	Available Logical Addresses: 1
> 	Connector Info             : None
> 	Physical Address           : 0.0.0.0
> 	Logical Address Mask       : 0x0001
> 	CEC Version                : 2.0
> 	Vendor ID                  : 0x000c03 (HDMI)
> 	OSD Name                   : 'TV  '
> 	Logical Addresses          : 1 (Allow RC Passthrough)
> 
> 	  Logical Address          : 0 (TV)
> 	    Primary Device Type    : TV
> 	    Logical Address Type   : TV
> 	    All Device Types       : TV
> 	    RC TV Profile          : None
> 	    Device Features        :
> 		None
> 
> $ sudo cec-ctl -M
> Driver Info:
> 	Driver Name                : pulse8-cec
> 	Adapter Name               : serio0
> 	Capabilities               : 0x0000003f
> 		Physical Address
> 		Logical Addresses
> 		Transmit
> 		Passthrough
> 		Remote Control Support
> 		Monitor All
> 	Driver version             : 5.9.8
> 	Available Logical Addresses: 1
> 	Connector Info             : None
> 	Physical Address           : 0.0.0.0
> 	Logical Address Mask       : 0x0001
> 	CEC Version                : 2.0
> 	Vendor ID                  : 0x000c03 (HDMI)
> 	OSD Name                   : 'TV  '
> 	Logical Addresses          : 1 (Allow RC Passthrough)
> 
> 	  Logical Address          : 0 (TV)
> 	    Primary Device Type    : TV
> 	    Logical Address Type   : TV
> 	    All Device Types       : TV
> 	    RC TV Profile          : None
> 	    Device Features        :
> 		None
> 
> 
> 
> Initial Event: State Change: PA: 0.0.0.0, LA mask: 0x0001, Conn Info: no
> Received from Unregistered to TV (15 to 0): IMAGE_VIEW_ON (0x04)
> 
> So it looks like it's working as expected?

Yes, it looks good. Make sure you test this for both outputs of the RPi4. If it
works for both, then you can add my

Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

for this series.

Very nice work, thank you for doing this!

Regards,

	Hans

> 
> Maxime
>