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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>
This commit is contained in:
Wolfram Sang 2016-01-04 03:33:46 +01:00 committed by Wolfram Sang
parent d0be8584b0
commit cd38a33750
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/i2c/adv7511.c
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@ -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: