Hi Alex, Laurent:
I want to make as few changes as possible on the current basis, and add bridge_fun,
> -----Original Message-----
> From: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Sent: 2024年5月21日 23:42
> To: Alex Bee <knaerzche@xxxxxxxxx>
> Cc: Keith Zhao <keith.zhao@xxxxxxxxxxxxxxxx>; andrzej.hajda@xxxxxxxxx;
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> Subject: Re: [PATCH v4 02/10] drm/bridge: add common api for inno hdmi
>
> On Tue, May 21, 2024 at 05:36:43PM +0200, Alex Bee wrote:
> > Hi Keith,
> >
> > thanks a lot for working on this. See some general remarks below
> >
> > Am 21.05.24 um 12:58 schrieb keith:
> > > Add INNO common api so that it can be used by vendor drivers which
> > > implement vendor specific extensions to Innosilicon HDMI.
> > >
> > > Signed-off-by: keith <keith.zhao@xxxxxxxxxxxxxxxx>
> > > ---
> > > MAINTAINERS | 2 +
> > > drivers/gpu/drm/bridge/Kconfig | 2 +
> > > drivers/gpu/drm/bridge/Makefile | 1 +
> > > drivers/gpu/drm/bridge/innosilicon/Kconfig | 6 +
> > > drivers/gpu/drm/bridge/innosilicon/Makefile | 2 +
> > > .../gpu/drm/bridge/innosilicon/inno-hdmi.c | 587
> ++++++++++++++++++
> > > .../gpu/drm/bridge/innosilicon/inno-hdmi.h | 97 +++
> > > include/drm/bridge/inno_hdmi.h | 69 ++
> > > 8 files changed, 766 insertions(+)
> > > create mode 100644 drivers/gpu/drm/bridge/innosilicon/Kconfig
> > > create mode 100644 drivers/gpu/drm/bridge/innosilicon/Makefile
> > > create mode 100644 drivers/gpu/drm/bridge/innosilicon/inno-hdmi.c
> > > create mode 100644 drivers/gpu/drm/bridge/innosilicon/inno-hdmi.h
> > > create mode 100644 include/drm/bridge/inno_hdmi.h
> > >
> > ....
> >
> > > + drm_encoder_helper_add(encoder, pdata->helper_private);
> > > +
> > > + hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD;
> > > +
> > > + drm_connector_helper_add(&hdmi->connector,
> > > + &inno_hdmi_connector_helper_funcs);
> > > +
> > > + drmm_connector_init(drm, &hdmi->connector,
> > > + &inno_hdmi_connector_funcs,
> > > + DRM_MODE_CONNECTOR_HDMIA,
> > > + hdmi->ddc);
> > > +
> >
> > I really don't want to anticipate bridge maintainer's feedback, but
> > new bridge drivers must not contain connector creation. That must
> > happen somewhere else.
>
> You're absolutely right :-) Connector creation should be handled by the
> drm_bridge_connector helper. The HDMI bridge driver should focus on the
> HDMI bridge itself.
static int inno_bridge_attach(struct drm_bridge *bridge,
enum drm_bridge_attach_flags flags)
{
struct inno_hdmi *hdmi = bridge_to_inno(bridge);
if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) {
DRM_ERROR("Fix bridge driver to make connector optional!");
return -EINVAL;
}
hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD;
drm_connector_helper_add(&hdmi->connector,
&inno_hdmi_connector_helper_funcs);
drmm_connector_init(drm, &hdmi->connector,
&inno_hdmi_connector_funcs,
DRM_MODE_CONNECTOR_HDMIA,
hdmi->ddc);
drm_connector_attach_encoder(&hdmi->connector, encoder);
}
static const struct drm_bridge_funcs inno_bridge_attach = {
.attach = inno_bridge_attach,
};
Connector creation is handled by the drm_bridge_funcs ->attach.
Is it ok?
Regards
Keith
>
> > Also I'm neither seeing any drm_brige struct nor drm_bridge_funcs,
> > which are both essential for a bridge driver. I don't think moving a
> > part of a driver to .../drm/bridge/ makes it a bridge driver.
> >
> > > + drm_connector_attach_encoder(&hdmi->connector, encoder);
> > > +
> > > + return 0;
> > > +}
> > > +
> > ....
> >
>
> --
> Regards,
>
> Laurent Pinchart
