drm/bridge: Add 984 serdes setting for resume

1, Add 984 serdes registers settting for suspend/resume 2. Set SCL high width output for 984 deserdes Test-done: Android suspend/resuem tested with panel EF1E-A1 Tracked-On: OAM-116590 Signed-off-by: Jia, Lin A <[email protected]>
projectceladon · Mar 20, 2024 · a2d9eee · a2d9eee
1 parent 38e39b9
commit a2d9eee
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Showing 2 changed files with 11 additions and 5 deletions.
diff --git a/drivers/gpu/drm/bridge/ti/fpd_dp_ser_drv.c b/drivers/gpu/drm/bridge/ti/fpd_dp_ser_drv.c
@@ -1660,6 +1660,9 @@ void fpd_dp_deser_984_enable_output(struct i2c_client *client)
 	fpd_dp_ser_write_reg(client, 0x4e, 0x0);
 	/* Enable INTB_IN */
 	fpd_dp_ser_write_reg(client, 0x44, 0x81);
+	/* i2c 400k */
+	fpd_dp_ser_write_reg(client, 0x2b, 0x0a);
+	fpd_dp_ser_write_reg(client, 0x2c, 0x0b);
 }
 
 void fpd_dp_deser_984_enable(void)
@@ -1713,6 +1716,9 @@ static void fpd_poll_984_training(void)
 
 	pr_debug("[FPD_DP] ser training lock completed, count = %d\n", fpd_dp_priv->count);
 
+	/* Delay for VPs to sync to DP source */
+	usleep_range(20000, 22000);
+
 	fpd_dp_deser_984_enable();
 }
 
@@ -1790,7 +1796,7 @@ static int get_bus_number(void)
 	return bus_number;
 }
 
-int fpd_dp_ser_init(void)
+bool fpd_dp_ser_init(void)
 {
 	fpd_dp_ser_enable();
 
@@ -1804,7 +1810,7 @@ int fpd_dp_ser_init(void)
 
 	fpd_dp_ser_motor_open(fpd_dp_priv->priv_dp_client[2]);
 
-	return 0;
+	return true;
 }
 
 static int fpd_dp_ser_probe(struct platform_device *pdev)
@@ -1914,7 +1920,7 @@ static int fpd_dp_ser_resume(struct device *dev)
 
 	pr_debug("[FPD_DP] [-%s-%s-%d-]\n", __FILE__, __func__, __LINE__);
 
-	result = fpd_dp_ser_enable();
+	result = fpd_dp_ser_init();
 	if (!result) {
 		pr_debug("Serdes enable fail in fpd_dp_ser_resume\n");
 		return -EIO;
@@ -1936,7 +1942,7 @@ static int fpd_dp_ser_runtime_resume(struct device *dev)
         bool result;
 
         pr_debug("[FPD_DP] [-%s-%s-%d-]\n", __FILE__, __func__, __LINE__);
-        result = fpd_dp_ser_enable();
+        result = fpd_dp_ser_init();
         return 0;
 }
 

diff --git a/drivers/gpu/drm/bridge/ti/fpd_dp_ser_drv.h b/drivers/gpu/drm/bridge/ti/fpd_dp_ser_drv.h
@@ -69,6 +69,6 @@ struct fpd_dp_ser_priv {
 void fpd_dp_ser_module_exit(void);
 int fpd_dp_ser_module_init(void);
 
-int fpd_dp_ser_init(void);
+bool fpd_dp_ser_init(void);
 
 #endif /* __FPD_DP_SER_DRV__ */