[PATCH] drm/bridge: ite-it6263: Support VESA input format

[tomm . merciai]

From: Tommaso Merciai <tommaso.merciai.xr@xxxxxxxxxxxxxx>

Introduce it6263_is_input_bus_fmt_valid() and refactor the
it6263_bridge_atomic_get_input_bus_fmts() function to support VESA
format by selecting the LVDS input format based on the LVDS data mapping
and thereby support both JEIDA and VESA input formats.

Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@xxxxxxxxxxxxxx>
---
 drivers/gpu/drm/bridge/ite-it6263.c | 25 ++++++++++++++++++++++---
 1 file changed, 22 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ite-it6263.c b/drivers/gpu/drm/bridge/ite-it6263.c
index cbabd4e20d3e..83d1db29157a 100644
--- a/drivers/gpu/drm/bridge/ite-it6263.c
+++ b/drivers/gpu/drm/bridge/ite-it6263.c
@@ -48,6 +48,7 @@
 #define  REG_COL_DEP			GENMASK(1, 0)
 #define  BIT8				FIELD_PREP(REG_COL_DEP, 1)
 #define  OUT_MAP			BIT(4)
+#define  VESA				BIT(4)
 #define  JEIDA				0
 #define  REG_DESSC_ENB			BIT(6)
 #define  DMODE				BIT(7)
@@ -428,12 +429,30 @@ static inline void it6263_lvds_reset(struct it6263 *it)
 	fsleep(10000);
 }
 
+static bool it6263_is_input_bus_fmt_valid(u32 input_fmt)
+{
+	switch (input_fmt) {
+	case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
+	case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
+		return true;
+	}
+	return false;
+}
+
 static inline void it6263_lvds_set_interface(struct it6263 *it)
 {
+	u8 fmt;
+
 	/* color depth */
 	regmap_write_bits(it->lvds_regmap, LVDS_REG_2C, REG_COL_DEP, BIT8);
+
+	if (it->lvds_data_mapping == MEDIA_BUS_FMT_RGB888_1X7X4_SPWG)
+		fmt = VESA;
+	else
+		fmt = JEIDA;
+
 	/* output mapping */
-	regmap_write_bits(it->lvds_regmap, LVDS_REG_2C, OUT_MAP, JEIDA);
+	regmap_write_bits(it->lvds_regmap, LVDS_REG_2C, OUT_MAP, fmt);
 
 	if (it->lvds_dual_link) {
 		regmap_write_bits(it->lvds_regmap, LVDS_REG_2C, DMODE, DISO);
@@ -714,14 +733,14 @@ it6263_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
 
 	*num_input_fmts = 0;
 
-	if (it->lvds_data_mapping != MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA)
+	if (!it6263_is_input_bus_fmt_valid(it->lvds_data_mapping))
 		return NULL;
 
 	input_fmts = kmalloc(sizeof(*input_fmts), GFP_KERNEL);
 	if (!input_fmts)
 		return NULL;
 
-	input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA;
+	input_fmts[0] = it->lvds_data_mapping;
 	*num_input_fmts = 1;
 
 	return input_fmts;
-- 
2.34.1