[PATCH v3 0/7] drm/i2c: adv7511: ADV7533 support

[Archit Taneja]

Hi Laurent,

On 3/9/2016 4:27 PM, Archit Taneja wrote:
> ADV7533 is a DSI to HDMI encoder chip. It's like ADV7511, but with an
> additional DSI RX block that takes in DSI video mode output.
>
> Trying to get this driver merged has had some challenges:
>
> - ADV7533 has an I2C control bus, but acts as a DSI peripheral too.
>    After discussions, it was concluded that we'd want to provide an
>    API to create MIPI DSI devices, rather than expose two different
>    interfaces on DT. The first version [1] tried the former approach
>    the second version [2] showed how the driver would look like if
>    exposed 2 DT nodes. This lateset patchset relies on the MIPI DSI
>    device creation API provided by [3], this has been accepted and
>    should be merged for 4.6.
>
> - The driver was designed as an I2C slave encoder. When ADV7533
>    patches were posted [1], it was modelled as a bridge, but ADV7511
>    and others were still left as I2C slave encoders. This wasn't
>    accepted. After discussions, it was decided that ADV7511 too would
>    be converted into a bridge driver, and all the users of ADV7511
>    should assume it is a bridge. This bridge conversion was done in
>    [4]. There is still some debate over whether the bridge driver be
>    involved in the connector creation, or the KMS driver that has
>    the whole view of the display pipeline. This discussion shouldn't
>    affect this patch set, though.
>
> This patch set enables ADV7533 support with the above two issues
> now resolved. It also incorporates ADV7533 specific features and fixes
> that we've discovered since the first version of this patch was posted.
>
> Tested on ADV7533 chips on DB410c. It should work on the Hikey board too.
> I'd appreaciate if someone could test it on a ADV7511 platform since I
> don't have one.

Could you try this patch set on the rcar-du platform? It would help to
verify if this doesn't break ADV7511.

Thanks,
Archit

>
> [4]
> https://lists.freedesktop.org/archives/dri-devel/2016-January/098287.html
>
> [3]
> https://lkml.org/lkml/2016/2/12/67
>
> [2]
> https://lists.freedesktop.org/archives/dri-devel/2015-September/089884.html
>
> [1]:
> https://lists.freedesktop.org/archives/dri-devel/2015-July/087088.html
>
> Archit Taneja (7):
>    drm/i2c: adv7511: Convert to drm_bridge
>    drm/i2c: adv7511: Fix mutex deadlock when interrupts are disabled
>    drm/i2c: adv7511: Initial support for ADV7533
>    drm/i2c: adv7511: Create a MIPI DSI device
>    drm/i2c: adv7511: Use internal timing generator
>    drm/i2c: adv7511: Change number of DSI lanes dynamically
>    dt-bindings: drm/bridge: Update bindings for ADV7533
>
>   .../bindings/display/bridge/adi,adv7511.txt        |  25 +-
>   drivers/gpu/drm/i2c/adv7511.c                      | 539 +++++++++++++++++----
>   2 files changed, 476 insertions(+), 88 deletions(-)
>

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