[PATCH 1/2] drm/bridge: ti-tfp410: support hpd via gpio

Christopher Spinrath christopher.spinrath at rwth-aachen.de
Mon Mar 6 13:51:19 PST 2017

Hi Fabio,

On 03/06/2017 10:46 PM, Fabio Estevam wrote:
> Hi Christopher,
> On Mon, Mar 6, 2017 at 6:40 PM,  <christopher.spinrath at rwth-aachen.de> wrote:
>> From: Christopher Spinrath <christopher.spinrath at rwth-aachen.de>
>> On some boards the hpd pin of a hdmi connector is wired up to a gpio
>> pin. Since in the DRM world the tfp410 driver is responsible for
>> handling the connector, add support for hpd gpios in this very driver.
>> Signed-off-by: Christopher Spinrath <christopher.spinrath at rwth-aachen.de>
>> ---
>>  drivers/gpu/drm/bridge/ti-tfp410.c | 72 ++++++++++++++++++++++++++++++++++++--
> It would be nice to add 'hpd-gpios' property in the binding doc as well:
> Documentation/devicetree/bindings/display/bridge/ti,tfp410.txt

The hpd-gpios property does *not* belong to the ti,tfp410 binding but to 
the hdmi-connector one where it is already documented:

Unfortunatly, there is no dedicated driver for the connector in Linux; 
the connector properties have to be handled by the encoder (here  the 
tfp410) driver. Note that this already happens for the ddc-i2c-bus property.


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