summaryrefslogtreecommitdiffstats
path: root/drivers/video
diff options
context:
space:
mode:
authorTomi Valkeinen <tomi.valkeinen@ti.com>2013-08-06 09:50:22 +0300
committerTomi Valkeinen <tomi.valkeinen@ti.com>2014-03-19 11:03:05 +0200
commit3e22b355343d808bb09cc47b5ecb261af3b5753b (patch)
tree12bf66dfe5a5c33ae5c0fc40b676c83fa20fa325 /drivers/video
parent7f2bcd06558a40deecd4a294acbd0b3f659be911 (diff)
downloadop-kernel-dev-3e22b355343d808bb09cc47b5ecb261af3b5753b.zip
op-kernel-dev-3e22b355343d808bb09cc47b5ecb261af3b5753b.tar.gz
OMAPDSS: get dssdev->alias from DT alias
We currently create a "displayX" style alias name for all displays, using a number that is incremented for each registered display. With the new DSS device model there is no clear order in which the displays are registered, and thus the numbering is somewhat random. This patch improves the behavior for DT case so that if the displays have been assigned DT aliases, those aliases will be used as DSS aliases. This means that "display0" is always the one specified in the DT alias, and thus display0 can be used as default display in case the user didn't specify a default display. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com> Reviewed-by: Archit Taneja <archit@ti.com>
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/omap2/dss/display.c19
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/video/omap2/dss/display.c b/drivers/video/omap2/dss/display.c
index 012ada3..21080f9 100644
--- a/drivers/video/omap2/dss/display.c
+++ b/drivers/video/omap2/dss/display.c
@@ -134,9 +134,24 @@ static int disp_num_counter;
int omapdss_register_display(struct omap_dss_device *dssdev)
{
struct omap_dss_driver *drv = dssdev->driver;
+ int id;
- snprintf(dssdev->alias, sizeof(dssdev->alias),
- "display%d", disp_num_counter++);
+ /*
+ * Note: this presumes all the displays are either using DT or non-DT,
+ * which normally should be the case. This also presumes that all
+ * displays either have an DT alias, or none has.
+ */
+
+ if (dssdev->dev->of_node) {
+ id = of_alias_get_id(dssdev->dev->of_node, "display");
+
+ if (id < 0)
+ id = disp_num_counter++;
+ } else {
+ id = disp_num_counter++;
+ }
+
+ snprintf(dssdev->alias, sizeof(dssdev->alias), "display%d", id);
/* Use 'label' property for name, if it exists */
if (dssdev->dev->of_node)
OpenPOWER on IntegriCloud