linux-kernel - Re: [PATCH v13 08/12] drm: bridge/dw_hdmi: add mode

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Date:	Wed, 26 Nov 2014 17:23:05 +0100
From:	Philipp Zabel <p.zabel@...gutronix.de>
To:	Andy Yan <andy.yan@...k-chips.com>
Cc:	airlied@...ux.ie, heiko@...ech.de, fabio.estevam@...escale.com,
	rmk+kernel@....linux.org.uk,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Shawn Guo <shawn.guo@...aro.org>,
	Josh Boyer <jwboyer@...hat.com>,
	Sean Paul <seanpaul@...omium.org>,
	Inki Dae <inki.dae@...sung.com>,
	Dave Airlie <airlied@...hat.com>,
	Arnd Bergmann <arnd@...db.de>,
	Lucas Stach <l.stach@...gutronix.de>,
	Zubair.Kakakhel@...tec.com, djkurtz@...gle.com, ykk@...k-chips.com,
	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	devel@...verdev.osuosl.org, devicetree@...r.kernel.org,
	linux-rockchip@...ts.infradead.org, jay.xu@...k-chips.com,
	Pawel Moll <pawel.moll@....com>, mark.yao@...k-chips.com,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>
Subject: Re: [PATCH v13 08/12] drm: bridge/dw_hdmi: add mode_valid support

Am Mittwoch, den 26.11.2014, 21:33 +0800 schrieb Andy Yan:
> some platform may not support all the display mode,
> add mode_valid interface check it
> 
> also add drm_connector_register which add a debugfs
> interface for dump display modes and edid information
> 
> Signed-off-by: Andy Yan <andy.yan@...k-chips.com>
> ---
> 
> Changes in v13: None
> Changes in v12: None
> Changes in v11: None
> Changes in v10: None
> Changes in v9: None
> Changes in v8: None
> Changes in v7: None
> Changes in v6: None
> Changes in v5: None
> Changes in v4: None
> Changes in v3: None
> 
>  drivers/gpu/drm/bridge/dw_hdmi.c | 17 +++++++++++++++++
>  include/drm/bridge/dw_hdmi.h     |  2 ++
>  2 files changed, 19 insertions(+)
> 
> diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
> index 5e88c8d..b13e782 100644
> --- a/drivers/gpu/drm/bridge/dw_hdmi.c
> +++ b/drivers/gpu/drm/bridge/dw_hdmi.c
> @@ -1406,6 +1406,20 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
>  	return 0;
>  }
>  
> +static enum drm_mode_status
> +dw_hdmi_connector_mode_valid(struct drm_connector *connector,
> +			     struct drm_display_mode *mode)
> +{
> +	struct dw_hdmi *hdmi = container_of(connector,
> +					   struct dw_hdmi, connector);
> +	enum drm_mode_status mode_status = MODE_OK;
> +
> +	if (hdmi->plat_data->mode_valid)
> +		mode_status = hdmi->plat_data->mode_valid(connector, mode);
> +
> +	return mode_status;
> +}
> +
>  static struct drm_encoder *dw_hdmi_connector_best_encoder(struct drm_connector
>  							   *connector)
>  {
> @@ -1430,6 +1444,7 @@ static struct drm_connector_funcs dw_hdmi_connector_funcs = {
>  
>  static struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs = {
>  	.get_modes = dw_hdmi_connector_get_modes,
> +	.mode_valid = dw_hdmi_connector_mode_valid,
>  	.best_encoder = dw_hdmi_connector_best_encoder,
>  };
>  
> @@ -1631,6 +1646,8 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
>  
>  	dev_set_drvdata(dev, hdmi);
>  
> +	drm_connector_register(&hdmi->connector);
> +

This is not right, the connector is registered by the imx-drm core in
the drm_driver .load callback.

regards
Philipp

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