Replace explicit polling loop with equivalent call to
regmap_read_poll_timeout() for simplicity. No functional change
intended.

Signed-off-by: Andrey Smirnov <andrew.smir...@gmail.com>
Cc: Archit Taneja <arch...@codeaurora.org>
Cc: Andrzej Hajda <a.ha...@samsung.com>
Cc: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Cc: Chris Healy <cphe...@gmail.com>
Cc: Lucas Stach <l.st...@pengutronix.de>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-ker...@vger.kernel.org
---
 drivers/gpu/drm/bridge/tc358767.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/bridge/tc358767.c 
b/drivers/gpu/drm/bridge/tc358767.c
index c85468fcc157..6455e6484722 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -882,15 +882,11 @@ static int tc_main_link_setup(struct tc_data *tc)
        dp_phy_ctrl &= ~(DP_PHY_RST | PHY_M1_RST | PHY_M0_RST);
        tc_write(DP_PHY_CTRL, dp_phy_ctrl);
 
-       timeout = 1000;
-       do {
-               tc_read(DP_PHY_CTRL, &value);
-               udelay(1);
-       } while ((!(value & PHY_RDY)) && (--timeout));
-
-       if (timeout == 0) {
+       ret = regmap_read_poll_timeout(tc->regmap, DP_PHY_CTRL, value,
+                                      value & PHY_RDY, 1, 1000);
+       if (ret) {
                dev_err(dev, "timeout waiting for phy become ready");
-               return -ETIMEDOUT;
+               return ret;
        }
 
        /* Set misc: 8 bits per color */
-- 
2.20.1

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