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From: Sam Ravnborg <sam@ravnborg.org>
To: Hsin-Yi Wang <hsinyi@chromium.org>
Cc: Chun-Kuang Hu <chunkuang.hu@kernel.org>,
	Hans de Goede <hdegoede@redhat.com>,
	Thierry Reding <thierry.reding@gmail.com>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	dri-devel@lists.freedesktop.org,
	linux-mediatek@lists.infradead.org,
	Rob Clark <robdclark@chromium.org>,
	Stephen Boyd <swboyd@chromium.org>,
	Douglas Anderson <dianders@chromium.org>,
	Rob Herring <robh+dt@kernel.org>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 8/8] drm/mediatek: Config orientation property if panel provides it
Date: Mon, 6 Jun 2022 21:31:32 +0200	[thread overview]
Message-ID: <Yp5WFA2H52nHVP3d@ravnborg.org> (raw)
In-Reply-To: <20220606152431.1889185-9-hsinyi@chromium.org>

Hi Hsin-Yi,

On Mon, Jun 06, 2022 at 11:24:31PM +0800, Hsin-Yi Wang wrote:
> Panel orientation property should be set before drm_dev_register().
> Mediatek drm driver calls drm_dev_register() in .bind(). However, most
> panels sets orientation property relatively late, mostly in .get_modes()
> callback, since this is when they are able to get the connector and
> binds the orientation property to it, though the value should be known
> when the panel is probed.
> 
> Let the drm driver check if the remote end point is a panel and if it
> contains the orientation property. If it does, set it before
> drm_dev_register() is called.

I do not know the best way to do what you need to do here.
But it seems wrong to introduce a deprecated function
(drm_of_find_panel_or_bridge), to set the rotation property early.

I think you need to find a way to do this utilising the panel_bridge or
something.

	Sam

> 
> Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
> Reviewed-by: Hans de Goede <hdegoede@redhat.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_dsi.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
> index d9f10a33e6fa..c56282412bfa 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
> @@ -185,6 +185,7 @@ struct mtk_dsi {
>  	struct drm_encoder encoder;
>  	struct drm_bridge bridge;
>  	struct drm_bridge *next_bridge;
> +	struct drm_panel *panel;
>  	struct drm_connector *connector;
>  	struct phy *phy;
>  
> @@ -822,6 +823,12 @@ static int mtk_dsi_encoder_init(struct drm_device *drm, struct mtk_dsi *dsi)
>  		ret = PTR_ERR(dsi->connector);
>  		goto err_cleanup_encoder;
>  	}
> +
> +	/* Read panel orientation */
> +	if (dsi->panel)
> +		drm_connector_set_panel_orientation(dsi->connector,
> +				drm_panel_get_orientation(dsi->panel));
> +
>  	drm_connector_attach_encoder(dsi->connector, &dsi->encoder);
>  
>  	return 0;
> @@ -837,6 +844,9 @@ static int mtk_dsi_bind(struct device *dev, struct device *master, void *data)
>  	struct drm_device *drm = data;
>  	struct mtk_dsi *dsi = dev_get_drvdata(dev);
>  
> +	/* Get panel if existed */
> +	drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &dsi->panel, NULL);
> +
>  	ret = mtk_dsi_encoder_init(drm, dsi);
>  	if (ret)
>  		return ret;
> -- 
> 2.36.1.255.ge46751e96f-goog

WARNING: multiple messages have this Message-ID (diff)
From: Sam Ravnborg <sam@ravnborg.org>
To: Hsin-Yi Wang <hsinyi@chromium.org>
Cc: Rob Clark <robdclark@chromium.org>,
	Chun-Kuang Hu <chunkuang.hu@kernel.org>,
	Rob Herring <robh+dt@kernel.org>, David Airlie <airlied@linux.ie>,
	linux-kernel@vger.kernel.org,
	Douglas Anderson <dianders@chromium.org>,
	Stephen Boyd <swboyd@chromium.org>,
	Hans de Goede <hdegoede@redhat.com>,
	Thierry Reding <thierry.reding@gmail.com>,
	linux-mediatek@lists.infradead.org,
	dri-devel@lists.freedesktop.org,
	Thomas Zimmermann <tzimmermann@suse.de>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v4 8/8] drm/mediatek: Config orientation property if panel provides it
Date: Mon, 6 Jun 2022 21:31:32 +0200	[thread overview]
Message-ID: <Yp5WFA2H52nHVP3d@ravnborg.org> (raw)
In-Reply-To: <20220606152431.1889185-9-hsinyi@chromium.org>

Hi Hsin-Yi,

On Mon, Jun 06, 2022 at 11:24:31PM +0800, Hsin-Yi Wang wrote:
> Panel orientation property should be set before drm_dev_register().
> Mediatek drm driver calls drm_dev_register() in .bind(). However, most
> panels sets orientation property relatively late, mostly in .get_modes()
> callback, since this is when they are able to get the connector and
> binds the orientation property to it, though the value should be known
> when the panel is probed.
> 
> Let the drm driver check if the remote end point is a panel and if it
> contains the orientation property. If it does, set it before
> drm_dev_register() is called.

I do not know the best way to do what you need to do here.
But it seems wrong to introduce a deprecated function
(drm_of_find_panel_or_bridge), to set the rotation property early.

I think you need to find a way to do this utilising the panel_bridge or
something.

	Sam

> 
> Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
> Reviewed-by: Hans de Goede <hdegoede@redhat.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_dsi.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
> index d9f10a33e6fa..c56282412bfa 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
> @@ -185,6 +185,7 @@ struct mtk_dsi {
>  	struct drm_encoder encoder;
>  	struct drm_bridge bridge;
>  	struct drm_bridge *next_bridge;
> +	struct drm_panel *panel;
>  	struct drm_connector *connector;
>  	struct phy *phy;
>  
> @@ -822,6 +823,12 @@ static int mtk_dsi_encoder_init(struct drm_device *drm, struct mtk_dsi *dsi)
>  		ret = PTR_ERR(dsi->connector);
>  		goto err_cleanup_encoder;
>  	}
> +
> +	/* Read panel orientation */
> +	if (dsi->panel)
> +		drm_connector_set_panel_orientation(dsi->connector,
> +				drm_panel_get_orientation(dsi->panel));
> +
>  	drm_connector_attach_encoder(dsi->connector, &dsi->encoder);
>  
>  	return 0;
> @@ -837,6 +844,9 @@ static int mtk_dsi_bind(struct device *dev, struct device *master, void *data)
>  	struct drm_device *drm = data;
>  	struct mtk_dsi *dsi = dev_get_drvdata(dev);
>  
> +	/* Get panel if existed */
> +	drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &dsi->panel, NULL);
> +
>  	ret = mtk_dsi_encoder_init(drm, dsi);
>  	if (ret)
>  		return ret;
> -- 
> 2.36.1.255.ge46751e96f-goog

WARNING: multiple messages have this Message-ID (diff)
From: Sam Ravnborg <sam@ravnborg.org>
To: Hsin-Yi Wang <hsinyi@chromium.org>
Cc: Chun-Kuang Hu <chunkuang.hu@kernel.org>,
	Hans de Goede <hdegoede@redhat.com>,
	Thierry Reding <thierry.reding@gmail.com>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	dri-devel@lists.freedesktop.org,
	linux-mediatek@lists.infradead.org,
	Rob Clark <robdclark@chromium.org>,
	Stephen Boyd <swboyd@chromium.org>,
	Douglas Anderson <dianders@chromium.org>,
	Rob Herring <robh+dt@kernel.org>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 8/8] drm/mediatek: Config orientation property if panel provides it
Date: Mon, 6 Jun 2022 21:31:32 +0200	[thread overview]
Message-ID: <Yp5WFA2H52nHVP3d@ravnborg.org> (raw)
In-Reply-To: <20220606152431.1889185-9-hsinyi@chromium.org>

Hi Hsin-Yi,

On Mon, Jun 06, 2022 at 11:24:31PM +0800, Hsin-Yi Wang wrote:
> Panel orientation property should be set before drm_dev_register().
> Mediatek drm driver calls drm_dev_register() in .bind(). However, most
> panels sets orientation property relatively late, mostly in .get_modes()
> callback, since this is when they are able to get the connector and
> binds the orientation property to it, though the value should be known
> when the panel is probed.
> 
> Let the drm driver check if the remote end point is a panel and if it
> contains the orientation property. If it does, set it before
> drm_dev_register() is called.

I do not know the best way to do what you need to do here.
But it seems wrong to introduce a deprecated function
(drm_of_find_panel_or_bridge), to set the rotation property early.

I think you need to find a way to do this utilising the panel_bridge or
something.

	Sam

> 
> Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
> Reviewed-by: Hans de Goede <hdegoede@redhat.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_dsi.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
> index d9f10a33e6fa..c56282412bfa 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
> @@ -185,6 +185,7 @@ struct mtk_dsi {
>  	struct drm_encoder encoder;
>  	struct drm_bridge bridge;
>  	struct drm_bridge *next_bridge;
> +	struct drm_panel *panel;
>  	struct drm_connector *connector;
>  	struct phy *phy;
>  
> @@ -822,6 +823,12 @@ static int mtk_dsi_encoder_init(struct drm_device *drm, struct mtk_dsi *dsi)
>  		ret = PTR_ERR(dsi->connector);
>  		goto err_cleanup_encoder;
>  	}
> +
> +	/* Read panel orientation */
> +	if (dsi->panel)
> +		drm_connector_set_panel_orientation(dsi->connector,
> +				drm_panel_get_orientation(dsi->panel));
> +
>  	drm_connector_attach_encoder(dsi->connector, &dsi->encoder);
>  
>  	return 0;
> @@ -837,6 +844,9 @@ static int mtk_dsi_bind(struct device *dev, struct device *master, void *data)
>  	struct drm_device *drm = data;
>  	struct mtk_dsi *dsi = dev_get_drvdata(dev);
>  
> +	/* Get panel if existed */
> +	drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &dsi->panel, NULL);
> +
>  	ret = mtk_dsi_encoder_init(drm, dsi);
>  	if (ret)
>  		return ret;
> -- 
> 2.36.1.255.ge46751e96f-goog

_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

WARNING: multiple messages have this Message-ID (diff)
From: Sam Ravnborg <sam@ravnborg.org>
To: Hsin-Yi Wang <hsinyi@chromium.org>
Cc: Chun-Kuang Hu <chunkuang.hu@kernel.org>,
	Hans de Goede <hdegoede@redhat.com>,
	Thierry Reding <thierry.reding@gmail.com>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	dri-devel@lists.freedesktop.org,
	linux-mediatek@lists.infradead.org,
	Rob Clark <robdclark@chromium.org>,
	Stephen Boyd <swboyd@chromium.org>,
	Douglas Anderson <dianders@chromium.org>,
	Rob Herring <robh+dt@kernel.org>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 8/8] drm/mediatek: Config orientation property if panel provides it
Date: Mon, 6 Jun 2022 21:31:32 +0200	[thread overview]
Message-ID: <Yp5WFA2H52nHVP3d@ravnborg.org> (raw)
In-Reply-To: <20220606152431.1889185-9-hsinyi@chromium.org>

Hi Hsin-Yi,

On Mon, Jun 06, 2022 at 11:24:31PM +0800, Hsin-Yi Wang wrote:
> Panel orientation property should be set before drm_dev_register().
> Mediatek drm driver calls drm_dev_register() in .bind(). However, most
> panels sets orientation property relatively late, mostly in .get_modes()
> callback, since this is when they are able to get the connector and
> binds the orientation property to it, though the value should be known
> when the panel is probed.
> 
> Let the drm driver check if the remote end point is a panel and if it
> contains the orientation property. If it does, set it before
> drm_dev_register() is called.

I do not know the best way to do what you need to do here.
But it seems wrong to introduce a deprecated function
(drm_of_find_panel_or_bridge), to set the rotation property early.

I think you need to find a way to do this utilising the panel_bridge or
something.

	Sam

> 
> Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
> Reviewed-by: Hans de Goede <hdegoede@redhat.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_dsi.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
> index d9f10a33e6fa..c56282412bfa 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
> @@ -185,6 +185,7 @@ struct mtk_dsi {
>  	struct drm_encoder encoder;
>  	struct drm_bridge bridge;
>  	struct drm_bridge *next_bridge;
> +	struct drm_panel *panel;
>  	struct drm_connector *connector;
>  	struct phy *phy;
>  
> @@ -822,6 +823,12 @@ static int mtk_dsi_encoder_init(struct drm_device *drm, struct mtk_dsi *dsi)
>  		ret = PTR_ERR(dsi->connector);
>  		goto err_cleanup_encoder;
>  	}
> +
> +	/* Read panel orientation */
> +	if (dsi->panel)
> +		drm_connector_set_panel_orientation(dsi->connector,
> +				drm_panel_get_orientation(dsi->panel));
> +
>  	drm_connector_attach_encoder(dsi->connector, &dsi->encoder);
>  
>  	return 0;
> @@ -837,6 +844,9 @@ static int mtk_dsi_bind(struct device *dev, struct device *master, void *data)
>  	struct drm_device *drm = data;
>  	struct mtk_dsi *dsi = dev_get_drvdata(dev);
>  
> +	/* Get panel if existed */
> +	drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &dsi->panel, NULL);
> +
>  	ret = mtk_dsi_encoder_init(drm, dsi);
>  	if (ret)
>  		return ret;
> -- 
> 2.36.1.255.ge46751e96f-goog

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2022-06-06 19:31 UTC|newest]

Thread overview: 88+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-06 15:24 [PATCH v4 0/8] Add a panel API to return panel orientation Hsin-Yi Wang
2022-06-06 15:24 ` Hsin-Yi Wang
2022-06-06 15:24 ` Hsin-Yi Wang
2022-06-06 15:24 ` Hsin-Yi Wang
2022-06-06 15:24 ` [PATCH v4 1/8] drm/panel: Add an API drm_panel_get_orientation() " Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 19:06   ` Stephen Boyd
2022-06-06 19:06     ` Stephen Boyd
2022-06-06 19:06     ` Stephen Boyd
2022-06-06 19:06     ` Stephen Boyd
2022-06-07  7:53     ` Hsin-Yi Wang
2022-06-07  7:53       ` Hsin-Yi Wang
2022-06-07  7:53       ` Hsin-Yi Wang
2022-06-07  7:53       ` Hsin-Yi Wang
2022-06-06 19:20   ` Sam Ravnborg
2022-06-06 19:20     ` Sam Ravnborg
2022-06-06 19:20     ` Sam Ravnborg
2022-06-06 19:20     ` Sam Ravnborg
2022-06-06 20:15     ` Hans de Goede
2022-06-06 20:15       ` Hans de Goede
2022-06-06 20:15       ` Hans de Goede
2022-06-06 20:15       ` Hans de Goede
2022-06-06 20:50       ` Sam Ravnborg
2022-06-06 20:50         ` Sam Ravnborg
2022-06-06 20:50         ` Sam Ravnborg
2022-06-06 20:50         ` Sam Ravnborg
2022-06-06 15:24 ` [PATCH v4 2/8] drm/panel: boe-tv101wum-nl6: Implement .get_orientation callback Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 15:24 ` [PATCH v4 3/8] drm/panel: panel-edp: " Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 15:24 ` [PATCH v4 4/8] drm/panel: lvds: " Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 19:08   ` Stephen Boyd
2022-06-06 19:08     ` Stephen Boyd
2022-06-06 19:08     ` Stephen Boyd
2022-06-06 19:08     ` Stephen Boyd
2022-06-06 15:24 ` [PATCH v4 5/8] drm/panel: panel-simple: " Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 19:25   ` Sam Ravnborg
2022-06-06 19:25     ` Sam Ravnborg
2022-06-06 19:25     ` Sam Ravnborg
2022-06-06 19:25     ` Sam Ravnborg
2022-06-07  3:54     ` Hsin-Yi Wang
2022-06-07  3:54       ` Hsin-Yi Wang
2022-06-07  3:54       ` Hsin-Yi Wang
2022-06-07  3:54       ` Hsin-Yi Wang
2022-06-06 15:24 ` [PATCH v4 6/8] drm/panel: ili9881c: " Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 15:24 ` [PATCH v4 7/8] drm/panel: elida-kd35t133: " Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 15:24 ` [PATCH v4 8/8] drm/mediatek: Config orientation property if panel provides it Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 15:24   ` Hsin-Yi Wang
2022-06-06 19:16   ` Stephen Boyd
2022-06-06 19:16     ` Stephen Boyd
2022-06-06 19:16     ` Stephen Boyd
2022-06-06 19:16     ` Stephen Boyd
2022-06-07  3:46     ` Hsin-Yi Wang
2022-06-07  3:46       ` Hsin-Yi Wang
2022-06-07  3:46       ` Hsin-Yi Wang
2022-06-07  3:46       ` Hsin-Yi Wang
2022-06-06 19:31   ` Sam Ravnborg [this message]
2022-06-06 19:31     ` Sam Ravnborg
2022-06-06 19:31     ` Sam Ravnborg
2022-06-06 19:31     ` Sam Ravnborg
2022-06-07  3:53     ` Hsin-Yi Wang
2022-06-07  3:53       ` Hsin-Yi Wang
2022-06-07  3:53       ` Hsin-Yi Wang
2022-06-07  3:53       ` Hsin-Yi Wang
2022-06-06 19:28 ` [PATCH v4 0/8] Add a panel API to return panel orientation Sam Ravnborg
2022-06-06 19:28   ` Sam Ravnborg
2022-06-06 19:28   ` Sam Ravnborg
2022-06-06 19:28   ` Sam Ravnborg

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