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drm/omap: dss: Add function to retrieve display for an output 

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>
This commit is contained in:
Laurent Pinchart 2018-03-05 14:28:06 +02:00 committed by Tomi Valkeinen
parent f7e376aece
commit bea131966f
2 changed files with 10 additions and 0 deletions
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9
drivers/gpu/drm/omapdrm/dss/display.c
View File

@ -49,3 +49,12 @@ void omapdss_display_init(struct omap_dss_device *dssdev)
"display%u", id);
}
EXPORT_SYMBOL_GPL(omapdss_display_init);
struct omap_dss_device *omapdss_display_get(struct omap_dss_device *output)
{
while (output->next)
output = output->next;
return omapdss_device_get(output);
}
EXPORT_SYMBOL_GPL(omapdss_display_get);

1
drivers/gpu/drm/omapdrm/dss/omapdss.h
View File

@ -496,6 +496,7 @@ static inline bool omapdss_is_initialized(void)
#define for_each_dss_display(d) \
while ((d = omapdss_device_get_next(d, OMAP_DSS_DEVICE_TYPE_DISPLAY)) != NULL)
void omapdss_display_init(struct omap_dss_device *dssdev);
struct omap_dss_device *omapdss_display_get(struct omap_dss_device *output);
void omapdss_device_register(struct omap_dss_device *dssdev);
void omapdss_device_unregister(struct omap_dss_device *dssdev);