From: Laurent Pinchart laurent.pinchart@ideasonboard.com

[ Upstream commit 8090f7eb318d4241625449252db2741e7703e027 ]

When refactoring port lookup for DSS outputs, commit d17eb4537a7e ("drm/omap: Factor out common init/cleanup code for output devices") incorrectly hardcoded usage of DT port 0. This breaks operation for SDI (which uses the DT port 1) and DPI outputs other than DPI0 (which are not used in mainline DT sources).

Fix this by using the port number from the output omap_dss_device of_ports field.

Fixes: d17eb4537a7e ("drm/omap: Factor out common init/cleanup code for output devices") Signed-off-by: Laurent Pinchart laurent.pinchart@ideasonboard.com Signed-off-by: Tomi Valkeinen tomi.valkeinen@ti.com Link: https://patchwork.freedesktop.org/patch/msgid/20190821183226.13784-1-laurent... Tested-by: Aaro Koskinen aaro.koskinen@iki.fi Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/omapdrm/dss/output.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/omapdrm/dss/output.c b/drivers/gpu/drm/omapdrm/dss/output.c index de0f882f0f7b0..14b41de44ebcd 100644 --- a/drivers/gpu/drm/omapdrm/dss/output.c +++ b/drivers/gpu/drm/omapdrm/dss/output.c @@ -4,6 +4,7 @@ * Author: Archit Taneja archit@ti.com */

+#include <linux/bitops.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> @@ -20,7 +21,8 @@ int omapdss_device_init_output(struct omap_dss_device *out) { struct device_node *remote_node;

- remote_node = of_graph_get_remote_node(out->dev->of_node, 0, 0); + remote_node = of_graph_get_remote_node(out->dev->of_node, + ffs(out->of_ports) - 1, 0); if (!remote_node) { dev_dbg(out->dev, "failed to find video sink\n"); return 0;