From: Laurent Pinchart Date: Mon, 5 Mar 2018 12:28:06 +0000 (+0200) Subject: drm/omap: dss: Add function to retrieve display for an output X-Git-Tag: v4.20-rc1~81^2~29^2~59 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=bea131966ffab271e8c3b33e37244ad340fb7876;p=linux.git 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 Reviewed-by: Sebastian Reichel Signed-off-by: Tomi Valkeinen --- diff --git a/drivers/gpu/drm/omapdrm/dss/display.c b/drivers/gpu/drm/omapdrm/dss/display.c index 53cb46f6503d..34b2a4ef63a4 100644 --- a/drivers/gpu/drm/omapdrm/dss/display.c +++ b/drivers/gpu/drm/omapdrm/dss/display.c @@ -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); diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss.h b/drivers/gpu/drm/omapdrm/dss/omapdss.h index 5cbbfb16369b..1621d1eaed42 100644 --- a/drivers/gpu/drm/omapdrm/dss/omapdss.h +++ b/drivers/gpu/drm/omapdrm/dss/omapdss.h @@ -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);