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authorWolfram Sang <wsa+renesas@sang-engineering.com>2016-01-04 05:33:46 +0300
committerWolfram Sang <wsa@the-dreams.de>2016-02-02 17:37:52 +0300
commitcd38a33750ace4300ef91b9ad668baf07c3bfd2b (patch)
tree49565e1a9904942ae5eae3dc6f5d498de61f8890 /drivers/gpu/drm/i2c
parentd0be8584b01160eb6f49e77f8e9c1da286bb4ffb (diff)
downloadlinux-cd38a33750ace4300ef91b9ad668baf07c3bfd2b.tar.xz
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>
Diffstat (limited to 'drivers/gpu/drm/i2c')
-rw-r--r--drivers/gpu/drm/i2c/adv7511.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i2c/adv7511.c b/drivers/gpu/drm/i2c/adv7511.c
index db7435a4517f..e1756a452d69 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: