The 5 volt detect functionality broke in 3.14: the code reads IO register 0x70
again after it has already been cleared. Instead it should use the cached
irq_reg_0x70 value and the io_write to 0x71 to clear 0x70 can be dropped since
this has already been done.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # for v3.14 and up
---
drivers/media/i2c/adv7604.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c
index 45a3e12..9355553 100644
--- a/drivers/media/i2c/adv7604.c
+++ b/drivers/media/i2c/adv7604.c
@@ -2199,10 +2199,9 @@ static int adv76xx_isr(struct v4l2_subdev *sd, u32 status, bool *handled)
adv76xx_cec_isr(sd, handled);
/* tx 5v detect */
- tx_5v = io_read(sd, 0x70) & info->cable_det_mask;
+ tx_5v = irq_reg_0x70 & info->cable_det_mask;
if (tx_5v) {
v4l2_dbg(1, debug, sd, "%s: tx_5v: 0x%x\n", __func__, tx_5v);
- io_write(sd, 0x71, tx_5v);
adv76xx_s_detect_tx_5v_ctrl(sd);
if (handled)
*handled = true;
--
2.6.1
--
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