From: Neil Armstrong <narmstrong@baylibre.com>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Robert Foss <robert.foss@linaro.org>,
Andrzej Hajda <a.hajda@samsung.com>,
paul@crapouillou.net, Jonas Karlman <jonas@kwiboo.se>,
Jernej Skrabec <jernej.skrabec@siol.net>,
dri-devel <dri-devel@lists.freedesktop.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Phong LE <ple@baylibre.com>
Subject: Re: [PATCH v3 2/3] drm: bridge: add it66121 driver
Date: Wed, 14 Apr 2021 17:37:20 +0200 [thread overview]
Message-ID: <9f7e7ca9-5c34-91cc-07ab-1a65caf92eac@baylibre.com> (raw)
In-Reply-To: <YHak0zr0o0thq/fu@pendragon.ideasonboard.com>
On 14/04/2021 10:16, Laurent Pinchart wrote:
> Hi Neil,
>
> On Wed, Apr 14, 2021 at 10:08:46AM +0200, Neil Armstrong wrote:
>> On 14/04/2021 10:06, Robert Foss wrote:
>>> On Wed, 14 Apr 2021 at 08:13, Neil Armstrong <narmstrong@baylibre.com> wrote:
>>>> Le 13/04/2021 à 22:21, Robert Foss a écrit :
>>>>> Hey Neil & Phong,
>>>>>
>>>>> Thanks for submitting this series!
>>>>>
>>>>>> +
>>>>>> +static const struct drm_bridge_funcs it66121_bridge_funcs = {
>>>>>> + .attach = it66121_bridge_attach,
>>>>>> + .enable = it66121_bridge_enable,
>>>>>> + .disable = it66121_bridge_disable,
>>>>>> + .mode_set = it66121_bridge_mode_set,
>>>>>> + .mode_valid = it66121_bridge_mode_valid,
>>>>>> + .detect = it66121_bridge_detect,
>>>>>> + .get_edid = it66121_bridge_get_edid,
>>>>>> + .atomic_get_output_bus_fmts = it66121_bridge_atomic_get_output_bus_fmts,
>>>>>> + .atomic_get_input_bus_fmts = it66121_bridge_atomic_get_input_bus_fmts,
>>>>>> +};
>>>>>
>>>>> I would like to see an implementation of HPD, since it is supported by
>>>>> the hardware[1] (and required by the documentation). IRQ status bit 0
>>>>> seems to be the responsible for notifying us about hot plug detection
>>>>> events.
>>>>
>>>> It's implemented in the IRQ handler with the IT66121_INT_STATUS1_HPD_STATUS event.
>>>
>>> I didn't even get that far :)
>>>
>>> Either way, the HPD support should be exposed in drm_bridge_funcs
>>> (.hpd_enable, .hpd_disable (and possibly .hpd_notify)) and
>>> drm_bridge.ops (DRM_BRIDGE_OP_HPD).
>>
>> Indeed I forgot these calls in the NO_CONNECTOR implementation...
>
> For new bridges, you should no implement connector creation, only the
> DRM_BRIDGE_ATTACH_NO_CONNECTOR case should be supported.
>
Right, time to make a clean bridge-only implementation then !
Thanks for your feedbacks,
Neil
next prev parent reply other threads:[~2021-04-14 15:37 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-12 15:46 [PATCH v3 0/3] drm/bridge: Add it66121 driver Neil Armstrong
2021-04-12 15:46 ` [PATCH v3 1/3] dt-bindings: display: bridge: add it66121 bindings Neil Armstrong
2021-04-13 15:11 ` Rob Herring
2021-04-13 16:03 ` Laurent Pinchart
2021-04-14 8:14 ` Neil Armstrong
2021-04-13 18:09 ` Paul Cercueil
2021-04-13 20:17 ` Laurent Pinchart
2021-04-12 15:46 ` [PATCH v3 2/3] drm: bridge: add it66121 driver Neil Armstrong
2021-04-13 20:21 ` Robert Foss
2021-04-14 6:13 ` Neil Armstrong
2021-04-14 8:06 ` Robert Foss
2021-04-14 8:08 ` Neil Armstrong
2021-04-14 8:16 ` Laurent Pinchart
2021-04-14 15:37 ` Neil Armstrong [this message]
2021-04-13 20:56 ` Paul Cercueil
2021-04-14 6:17 ` Neil Armstrong
2021-04-14 8:15 ` Paul Cercueil
2021-04-14 17:35 ` Paul Cercueil
2021-04-15 8:54 ` Neil Armstrong
2021-04-12 15:46 ` [PATCH v3 3/3] MAINTAINERS: add it66121 HDMI bridge driver entry Neil Armstrong
2021-04-12 15:47 ` Neil Armstrong
2021-04-13 17:53 ` Robert Foss
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