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Subject: [media] adv7604: fix tx 5v detect regression
Author:  Hans Verkuil <[email protected]>
Date:    Wed Feb 10 08:09:10 2016 -0200

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 <[email protected]>
Cc: <[email protected]>      # for v3.14 and up
Signed-off-by: Mauro Carvalho Chehab <[email protected]>

 drivers/media/i2c/adv7604.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

---

http://git.linuxtv.org/cgit.cgi/media_tree.git/commit/?id=0ba4581c84cfb39fd527f6b3457f1c97f6356c04
diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c
index f8dd7505b529..e1719ffdfb3d 100644
--- a/drivers/media/i2c/adv7604.c
+++ b/drivers/media/i2c/adv7604.c
@@ -1960,10 +1960,9 @@ static int adv76xx_isr(struct v4l2_subdev *sd, u32 
status, bool *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;

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