1 files changed, 18 insertions, 9 deletions

diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c
index 547e0c9d3bdc..dfe4351c9bdd 100644
--- a/drivers/gpu/drm/bridge/ite-it6505.c
+++ b/drivers/gpu/drm/bridge/ite-it6505.c
@@ -506,6 +506,9 @@ static int it6505_read(struct it6505 *it6505, unsigned int reg_addr)
 	int err;
 	struct device *dev = &it6505->client->dev;
 
+	if (!it6505->powered)
+		return -ENODEV;
+
 	err = regmap_read(it6505->regmap, reg_addr, &value);
 	if (err < 0) {
 		dev_err(dev, "read failed reg[0x%x] err: %d", reg_addr, err);
@@ -521,6 +524,9 @@ static int it6505_write(struct it6505 *it6505, unsigned int reg_addr,
 	int err;
 	struct device *dev = &it6505->client->dev;
 
+	if (!it6505->powered)
+		return -ENODEV;
+
 	err = regmap_write(it6505->regmap, reg_addr, reg_val);
 
 	if (err < 0) {
@@ -538,6 +544,9 @@ static int it6505_set_bits(struct it6505 *it6505, unsigned int reg,
 	int err;
 	struct device *dev = &it6505->client->dev;
 
+	if (!it6505->powered)
+		return -ENODEV;
+
 	err = regmap_update_bits(it6505->regmap, reg, mask, value);
 	if (err < 0) {
 		dev_err(dev, "write reg[0x%x] = 0x%x mask = 0x%x failed err %d",
@@ -554,7 +563,7 @@ static void it6505_debug_print(struct it6505 *it6505, unsigned int reg,
 	struct device *dev = &it6505->client->dev;
 	int val;
 
-	if (likely(!(__drm_debug & DRM_UT_DRIVER)))
+	if (!drm_debug_enabled(DRM_UT_DRIVER))
 		return;
 
 	val = it6505_read(it6505, reg);
@@ -682,7 +691,7 @@ static void it6505_calc_video_info(struct it6505 *it6505)
 	DRM_DEV_DEBUG_DRIVER(dev, "hactive_start:%d, vactive_start:%d",
 			     hdes, vdes);
 
-	for (i = 0; i < 10; i++) {
+	for (i = 0; i < 3; i++) {
 		it6505_set_bits(it6505, REG_DATA_CTRL0, ENABLE_PCLK_COUNTER,
 				ENABLE_PCLK_COUNTER);
 		usleep_range(10000, 15000);
@@ -699,7 +708,7 @@ static void it6505_calc_video_info(struct it6505 *it6505)
 		return;
 	}
 
-	sum /= 10;
+	sum /= 3;
 	pclk = 13500 * 2048 / sum;
 	it6505->video_info.clock = pclk;
 	it6505->video_info.hdisplay = hdew;
@@ -2341,8 +2350,6 @@ static void it6505_irq_hpd(struct it6505 *it6505)
 
 		if (!it6505_get_video_status(it6505))
 			it6505_video_reset(it6505);
-
-		it6505_calc_video_info(it6505);
 	} else {
 		memset(it6505->dpcd, 0, sizeof(it6505->dpcd));
 
@@ -2559,13 +2566,12 @@ static int it6505_poweron(struct it6505 *it6505)
 		usleep_range(10000, 20000);
 	}
 
+	it6505->powered = true;
 	it6505_reset_logic(it6505);
 	it6505_int_mask_enable(it6505);
 	it6505_init(it6505);
 	it6505_lane_off(it6505);
 
-	it6505->powered = true;
-
 	return 0;
 }
 
@@ -2954,6 +2960,9 @@ static void it6505_bridge_atomic_enable(struct drm_bridge *bridge,
 
 	it6505_int_mask_enable(it6505);
 	it6505_video_reset(it6505);
+
+	it6505_drm_dp_link_set_power(&it6505->aux, &it6505->link,
+				     DP_SET_POWER_D0);
 }
 
 static void it6505_bridge_atomic_disable(struct drm_bridge *bridge,
@@ -2965,9 +2974,9 @@ static void it6505_bridge_atomic_disable(struct drm_bridge *bridge,
 	DRM_DEV_DEBUG_DRIVER(dev, "start");
 
 	if (it6505->powered) {
-		it6505_video_disable(it6505);
 		it6505_drm_dp_link_set_power(&it6505->aux, &it6505->link,
 					     DP_SET_POWER_D3);
+		it6505_video_disable(it6505);
 	}
 }
 
@@ -3044,7 +3053,7 @@ static int it6505_init_pdata(struct it6505 *it6505)
 		return PTR_ERR(pdata->ovdd);
 	}
 
-	pdata->gpiod_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+	pdata->gpiod_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
 	if (IS_ERR(pdata->gpiod_reset)) {
 		dev_err(dev, "gpiod_reset gpio not found");
 		return PTR_ERR(pdata->gpiod_reset);