commit cd38a33750ace4300ef91b9ad668baf07c3bfd2b
author Wolfram Sang <wsa+renesas@sang-engineering.com> Mon Jan 04 03:33:46 2016 +0100
committer Wolfram Sang <wsa@the-dreams.de> Tue Feb 02 15:37:52 2016 +0100
tree 49565e1a9904942ae5eae3dc6f5d498de61f8890
parent d0be8584b01160eb6f49e77f8e9c1da286bb4ffb

drm: adv7511: mark ADV7511_REG_EDID_READ_CTRL volatile

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@sang-engineering.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Archit Taneja <architt@codeaurora.org>

drivers/gpu/drm/i2c/adv7511.c

diff --git a/drivers/gpu/drm/i2c/adv7511.c b/drivers/gpu/drm/i2c/adv7511.c
index db7435a4..e1756a4 100644
--- a/drivers/gpu/drm/i2c/adv7511.c
+++ b/drivers/gpu/drm/i2c/adv7511.c
@@ -136,6 +136,7 @@
 	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: