[PATCHv2 05/27] OMAPDSS: get dssdev->alias from DT alias
From: Tomi Valkeinen <hidden>
Date: 2013-12-16 14:56:12
Also in:
linux-devicetree, linux-omap
Subsystem:
framebuffer layer, the rest · Maintainers:
Helge Deller, Linus Torvalds
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 <redacted> --- drivers/video/omap2/dss/display.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/drivers/video/omap2/dss/display.c b/drivers/video/omap2/dss/display.c
index 012ada38a29d..21080f9dae87 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)
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1.8.3.2