Linux-libre 4.5-gnu

1 files changed, 30 insertions, 20 deletions

diff --git a/drivers/gpu/drm/i2c/adv7511.c b/drivers/gpu/drm/i2c/adv7511.c
index 00416f23b..a02112ba1 100644
--- a/drivers/gpu/drm/i2c/adv7511.c
+++ b/drivers/gpu/drm/i2c/adv7511.c
@@ -136,6 +136,7 @@ static bool adv7511_register_volatile(struct device *dev, unsigned int reg)
 	case ADV7511_REG_BKSV(3):
 	case ADV7511_REG_BKSV(4):
 	case ADV7511_REG_DDC_STATUS:
+	case ADV7511_REG_EDID_READ_CTRL:
 	case ADV7511_REG_BSTATUS(0):
 	case ADV7511_REG_BSTATUS(1):
 	case ADV7511_REG_CHIP_ID_HIGH:
@@ -362,24 +363,31 @@ static void adv7511_power_on(struct adv7511 *adv7511)
 {
 	adv7511->current_edid_segment = -1;
 
-	regmap_write(adv7511->regmap, ADV7511_REG_INT(0),
-		     ADV7511_INT0_EDID_READY);
-	regmap_write(adv7511->regmap, ADV7511_REG_INT(1),
-		     ADV7511_INT1_DDC_ERROR);
 	regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
 			   ADV7511_POWER_POWER_DOWN, 0);
+	if (adv7511->i2c_main->irq) {
+		/*
+		 * Documentation says the INT_ENABLE registers are reset in
+		 * POWER_DOWN mode. My 7511w preserved the bits, however.
+		 * Still, let's be safe and stick to the documentation.
+		 */
+		regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(0),
+			     ADV7511_INT0_EDID_READY);
+		regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(1),
+			     ADV7511_INT1_DDC_ERROR);
+	}
 
 	/*
-	 * Per spec it is allowed to pulse the HDP signal to indicate that the
+	 * Per spec it is allowed to pulse the HPD signal to indicate that the
 	 * EDID information has changed. Some monitors do this when they wakeup
-	 * from standby or are enabled. When the HDP goes low the adv7511 is
+	 * from standby or are enabled. When the HPD goes low the adv7511 is
 	 * reset and the outputs are disabled which might cause the monitor to
-	 * go to standby again. To avoid this we ignore the HDP pin for the
+	 * go to standby again. To avoid this we ignore the HPD pin for the
 	 * first few seconds after enabling the output.
 	 */
 	regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
-			   ADV7511_REG_POWER2_HDP_SRC_MASK,
-			   ADV7511_REG_POWER2_HDP_SRC_NONE);
+			   ADV7511_REG_POWER2_HPD_SRC_MASK,
+			   ADV7511_REG_POWER2_HPD_SRC_NONE);
 
 	/*
 	 * Most of the registers are reset during power down or when HPD is low.
@@ -413,9 +421,9 @@ static bool adv7511_hpd(struct adv7511 *adv7511)
 	if (ret < 0)
 		return false;
 
-	if (irq0 & ADV7511_INT0_HDP) {
+	if (irq0 & ADV7511_INT0_HPD) {
 		regmap_write(adv7511->regmap, ADV7511_REG_INT(0),
-			     ADV7511_INT0_HDP);
+			     ADV7511_INT0_HPD);
 		return true;
 	}
 
@@ -438,7 +446,7 @@ static int adv7511_irq_process(struct adv7511 *adv7511)
 	regmap_write(adv7511->regmap, ADV7511_REG_INT(0), irq0);
 	regmap_write(adv7511->regmap, ADV7511_REG_INT(1), irq1);
 
-	if (irq0 & ADV7511_INT0_HDP && adv7511->encoder)
+	if (irq0 & ADV7511_INT0_HPD && adv7511->encoder)
 		drm_helper_hpd_irq_event(adv7511->encoder->dev);
 
 	if (irq0 & ADV7511_INT0_EDID_READY || irq1 & ADV7511_INT1_DDC_ERROR) {
@@ -567,12 +575,14 @@ static int adv7511_get_modes(struct drm_encoder *encoder,
 
 	/* Reading the EDID only works if the device is powered */
 	if (!adv7511->powered) {
-		regmap_write(adv7511->regmap, ADV7511_REG_INT(0),
-			     ADV7511_INT0_EDID_READY);
-		regmap_write(adv7511->regmap, ADV7511_REG_INT(1),
-			     ADV7511_INT1_DDC_ERROR);
 		regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
 				   ADV7511_POWER_POWER_DOWN, 0);
+		if (adv7511->i2c_main->irq) {
+			regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(0),
+				     ADV7511_INT0_EDID_READY);
+			regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(1),
+				     ADV7511_INT1_DDC_ERROR);
+		}
 		adv7511->current_edid_segment = -1;
 	}
 
@@ -638,10 +648,10 @@ adv7511_encoder_detect(struct drm_encoder *encoder,
 		if (adv7511->status == connector_status_connected)
 			status = connector_status_disconnected;
 	} else {
-		/* Renable HDP sensing */
+		/* Renable HPD sensing */
 		regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
-				   ADV7511_REG_POWER2_HDP_SRC_MASK,
-				   ADV7511_REG_POWER2_HDP_SRC_BOTH);
+				   ADV7511_REG_POWER2_HPD_SRC_MASK,
+				   ADV7511_REG_POWER2_HPD_SRC_BOTH);
 	}
 
 	adv7511->status = status;
@@ -752,7 +762,7 @@ static void adv7511_encoder_mode_set(struct drm_encoder *encoder,
 	adv7511->f_tmds = mode->clock;
 }
 
-static struct drm_encoder_slave_funcs adv7511_encoder_funcs = {
+static const struct drm_encoder_slave_funcs adv7511_encoder_funcs = {
 	.dpms = adv7511_encoder_dpms,
 	.mode_valid = adv7511_encoder_mode_valid,
 	.mode_set = adv7511_encoder_mode_set,