[PATCH 14/17] drm/imx: imx-ldb: add ldb_is_dual helper

[Marco Felsch]

There where several places where this bit operation is made. Add a
simple helper so we don't need to remember the bit each time.

Signed-off-by: Marco Felsch <m.felsch at pengutronix.de>
---
 drivers/gpu/drm/imx/imx-ldb.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/imx/imx-ldb.c b/drivers/gpu/drm/imx/imx-ldb.c
index e3fa46e1639d..5ef9fcb9ae94 100644
--- a/drivers/gpu/drm/imx/imx-ldb.c
+++ b/drivers/gpu/drm/imx/imx-ldb.c
@@ -95,11 +95,16 @@ struct imx_ldb {
 	const struct bus_mux *lvds_mux;
 };
 
+static inline int imx_ldb_is_dual(struct imx_ldb *ldb)
+{
+	return ldb->ldb_ctrl & LDB_SPLIT_MODE_EN;
+}
+
 static void imx_ldb_ch_set_bus_format(struct imx_ldb_channel *imx_ldb_ch,
 				      u32 bus_format)
 {
 	struct imx_ldb *ldb = imx_ldb_ch->ldb;
-	int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN;
+	int dual = imx_ldb_is_dual(ldb);
 
 	switch (bus_format) {
 	case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
@@ -196,7 +201,7 @@ static void imx_ldb_encoder_enable(struct drm_encoder *encoder)
 {
 	struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
 	struct imx_ldb *ldb = imx_ldb_ch->ldb;
-	int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN;
+	int dual = imx_ldb_is_dual(ldb);
 	int mux = drm_of_encoder_active_port_id(imx_ldb_ch->child, encoder);
 
 	drm_panel_prepare(imx_ldb_ch->panel);
@@ -251,7 +256,7 @@ imx_ldb_encoder_atomic_mode_set(struct drm_encoder *encoder,
 	struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
 	struct drm_display_mode *mode = &crtc_state->adjusted_mode;
 	struct imx_ldb *ldb = imx_ldb_ch->ldb;
-	int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN;
+	int dual = imx_ldb_is_dual(ldb);
 	unsigned long serial_clk;
 	unsigned long di_clk = mode->clock * 1000;
 	int mux = drm_of_encoder_active_port_id(imx_ldb_ch->child, encoder);
@@ -315,7 +320,7 @@ static void imx_ldb_encoder_disable(struct drm_encoder *encoder)
 
 	regmap_write(ldb->regmap, IOMUXC_GPR2, ldb->ldb_ctrl);
 
-	if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) {
+	if (imx_ldb_is_dual(ldb)) {
 		clk_disable_unprepare(ldb->clk[0]);
 		clk_disable_unprepare(ldb->clk[1]);
 	}
@@ -434,7 +439,7 @@ static int imx_ldb_register(struct drm_device *drm,
 	if (ret)
 		return ret;
 
-	if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) {
+	if (imx_ldb_is_dual(ldb)) {
 		ret = imx_ldb_get_clk(ldb, 1);
 		if (ret)
 			return ret;
@@ -557,7 +562,7 @@ static int imx_ldb_bind(struct device *dev, struct device *master, void *data)
 	struct drm_device *drm = data;
 	struct device_node *np = dev->of_node;
 	struct imx_ldb *imx_ldb = dev_get_drvdata(dev);
-	int dual = imx_ldb->ldb_ctrl & LDB_SPLIT_MODE_EN;
+	int dual = imx_ldb_is_dual(imx_ldb);
 	struct device_node *child;
 	int ret;
 	int i;
-- 
2.20.1