bea131966f
Add a new omapdss_display_get() function to retrieve the omap_dss_device for a given DSS output. This will be used when reversing the direction of the DSS pipeline handling logic. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
/*
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* Copyright (C) 2009 Nokia Corporation
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* Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
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*
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* Some code and ideas taken from drivers/video/omap/ driver
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* by Imre Deak.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define DSS_SUBSYS_NAME "DISPLAY"
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#include <linux/kernel.h>
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#include <linux/of.h>
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#include "omapdss.h"
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static int disp_num_counter;
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void omapdss_display_init(struct omap_dss_device *dssdev)
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{
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int id;
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/*
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* Note: this presumes that all displays either have an DT alias, or
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* none has.
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*/
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id = of_alias_get_id(dssdev->dev->of_node, "display");
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if (id < 0)
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id = disp_num_counter++;
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dssdev->alias_id = id;
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/* Use 'label' property for name, if it exists */
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of_property_read_string(dssdev->dev->of_node, "label", &dssdev->name);
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if (dssdev->name == NULL)
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dssdev->name = devm_kasprintf(dssdev->dev, GFP_KERNEL,
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"display%u", id);
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}
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EXPORT_SYMBOL_GPL(omapdss_display_init);
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struct omap_dss_device *omapdss_display_get(struct omap_dss_device *output)
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{
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while (output->next)
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output = output->next;
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return omapdss_device_get(output);
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}
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EXPORT_SYMBOL_GPL(omapdss_display_get);
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