gpu: imx: dpu: tcon: Add tcon_is_master/slave() helpers support

This patch adds tcon_is_master/slave() helpers support so that
callers may know if a tcon is a master or slave tcon.

Signed-off-by: Liu Ying <victor.liu@nxp.com>

2 files changed, 16 insertions, 0 deletions

diff --git a/drivers/gpu/imx/dpu/dpu-tcon.c b/drivers/gpu/imx/dpu/dpu-tcon.c
index efed5b74e2c0..199e6e55df15 100644
--- a/drivers/gpu/imx/dpu/dpu-tcon.c
+++ b/drivers/gpu/imx/dpu/dpu-tcon.c
@@ -186,6 +186,20 @@ void tcon_cfg_videomode(struct dpu_tcon *tcon, struct drm_display_mode *m)
 }
 EXPORT_SYMBOL_GPL(tcon_cfg_videomode);
 
+bool tcon_is_master(struct dpu_tcon *tcon)
+{
+	const struct dpu_data *data = tcon->dpu->data;
+
+	return tcon->id == data->master_stream_id;
+}
+EXPORT_SYMBOL_GPL(tcon_is_master);
+
+bool tcon_is_slave(struct dpu_tcon *tcon)
+{
+	return !tcon_is_master(tcon);
+}
+EXPORT_SYMBOL_GPL(tcon_is_slave);
+
 struct dpu_tcon *dpu_tcon_get(struct dpu_soc *dpu, int id)
 {
 	struct dpu_tcon *tcon;
diff --git a/include/video/dpu.h b/include/video/dpu.h
index 656ec850d715..b565061d1e3a 100644
--- a/include/video/dpu.h
+++ b/include/video/dpu.h
@@ -554,6 +554,8 @@ struct dpu_tcon;
 int tcon_set_fmt(struct dpu_tcon *tcon, u32 bus_format);
 void tcon_set_operation_mode(struct dpu_tcon *tcon);
 void tcon_cfg_videomode(struct dpu_tcon *tcon, struct drm_display_mode *m);
+bool tcon_is_master(struct dpu_tcon *tcon);
+bool tcon_is_slave(struct dpu_tcon *tcon);
 struct dpu_tcon *dpu_tcon_get(struct dpu_soc *dpu, int id);
 void dpu_tcon_put(struct dpu_tcon *tcon);
 struct dpu_tcon *dpu_aux_tcon_peek(struct dpu_tcon *tcon);