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drm/omap: dss: Fix output next device lookup in DT

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The DSS core looks up the next device connected to an output by
traversing the OF graph. It currently hardcodes the local port number to
0, which breaks any output with a different port number (SDI on OMAP3
and any DPI output but the first one). Fix this by repurposing the
currently unused of_ports bitmask in omap_dss_device with an of_port
output port number, and use it to traverse the OF graph.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Tested-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200226112514.12455-26-laurent.pinchart@ideasonboard.com
This commit is contained in:
Laurent Pinchart
2020-02-26 13:24:45 +02:00
committed by Tomi Valkeinen
parent a779618b4a
commit c83fefd738
13 changed files with 14 additions and 15 deletions
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3
drivers/gpu/drm/omapdrm/dss/output.c
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@@ -4,7 +4,6 @@
* Author: Archit Taneja <archit@ti.com>
*/
#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
@@ -24,7 +23,7 @@ int omapdss_device_init_output(struct omap_dss_device *out)
int ret;
remote_node = of_graph_get_remote_node(out->dev->of_node,
ffs(out->of_ports) - 1, 0);
out->of_port, 0);
if (!remote_node) {
dev_dbg(out->dev, "failed to find video sink\n");
return 0;