[PATCH v9 3/9] drm/bridge: fsl-ldb: Add support for i.MX94

[Laurentiu Palcu]

i.MX94 series LDB controller shares the same LDB and LVDS control
registers as i.MX8MP and i.MX93 but supports a higher maximum clock
frequency.

Add a 'max_clk_khz' member to the fsl_ldb_devdata structure in order to
be able to set different max frequencies for other platforms.

Signed-off-by: Laurentiu Palcu <laurentiu.palcu at oss.nxp.com>
---
 drivers/gpu/drm/bridge/fsl-ldb.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/fsl-ldb.c b/drivers/gpu/drm/bridge/fsl-ldb.c
index bd03c36ee696c..b4959f654f2ac 100644
--- a/drivers/gpu/drm/bridge/fsl-ldb.c
+++ b/drivers/gpu/drm/bridge/fsl-ldb.c
@@ -57,6 +57,7 @@ enum fsl_ldb_devtype {
 	IMX6SX_LDB,
 	IMX8MP_LDB,
 	IMX93_LDB,
+	IMX94_LDB,
 };
 
 struct fsl_ldb_devdata {
@@ -64,21 +65,31 @@ struct fsl_ldb_devdata {
 	u32 lvds_ctrl;
 	bool lvds_en_bit;
 	bool single_ctrl_reg;
+	u32 max_clk_khz;
 };
 
 static const struct fsl_ldb_devdata fsl_ldb_devdata[] = {
 	[IMX6SX_LDB] = {
 		.ldb_ctrl = 0x18,
 		.single_ctrl_reg = true,
+		.max_clk_khz = 80000,
 	},
 	[IMX8MP_LDB] = {
 		.ldb_ctrl = 0x5c,
 		.lvds_ctrl = 0x128,
+		.max_clk_khz = 80000,
 	},
 	[IMX93_LDB] = {
 		.ldb_ctrl = 0x20,
 		.lvds_ctrl = 0x24,
 		.lvds_en_bit = true,
+		.max_clk_khz = 80000,
+	},
+	[IMX94_LDB] = {
+		.ldb_ctrl = 0x04,
+		.lvds_ctrl = 0x08,
+		.lvds_en_bit = true,
+		.max_clk_khz = 148500,
 	},
 };
 
@@ -274,7 +285,7 @@ fsl_ldb_mode_valid(struct drm_bridge *bridge,
 {
 	struct fsl_ldb *fsl_ldb = to_fsl_ldb(bridge);
 
-	if (mode->clock > (fsl_ldb_is_dual(fsl_ldb) ? 160000 : 80000))
+	if (mode->clock > (fsl_ldb_is_dual(fsl_ldb) ? 2 : 1) * fsl_ldb->devdata->max_clk_khz)
 		return MODE_CLOCK_HIGH;
 
 	return MODE_OK;
@@ -386,6 +397,8 @@ static const struct of_device_id fsl_ldb_match[] = {
 	  .data = &fsl_ldb_devdata[IMX8MP_LDB], },
 	{ .compatible = "fsl,imx93-ldb",
 	  .data = &fsl_ldb_devdata[IMX93_LDB], },
+	{ .compatible = "fsl,imx94-ldb",
+	  .data = &fsl_ldb_devdata[IMX94_LDB], },
 	{ /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, fsl_ldb_match);

-- 
2.51.0