[PATCH] drm: adv7511: mark ADV7511_REG_EDID_READ_CTRL volatile

[Wolfram Sang]

From: Wolfram Sang <wsa+renesas at sang-engineering.com>

This register includes a counter which is decremented by the chip on I2C
failures. Also, it is reset when powering down.

Signed-off-by: Wolfram Sang <wsa+renesas at sang-engineering.com>
---
 drivers/gpu/drm/i2c/adv7511.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/i2c/adv7511.c b/drivers/gpu/drm/i2c/adv7511.c
index 85e994796d96a4..50a861b12346c4 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:
-- 
2.1.4