[4/9] drm/bridge: tc358767: Simplify polling in tc_main_link_setup()
diff mbox series

Message ID 20190226193609.9862-5-andrew.smirnov@gmail.com
State New
Headers show
Series
  • tc358767 driver improvements
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Commit Message

Andrey Smirnov Feb. 26, 2019, 7:36 p.m. UTC
Replace explicit polling loop with equivalent call to
regmap_read_poll_timeout() for simplicity. No functional change
intended.

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

Comments

Laurent Pinchart March 4, 2019, 12:28 p.m. UTC | #1
On Tue, Feb 26, 2019 at 11:36:04AM -0800, Andrey Smirnov wrote:
> Replace explicit polling loop with equivalent call to
> regmap_read_poll_timeout() for simplicity. No functional change
> intended.
> 
> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
> Cc: Archit Taneja <architt@codeaurora.org>
> Cc: Andrzej Hajda <a.hajda@samsung.com>
> Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
> Cc: Chris Healy <cphealy@gmail.com>
> Cc: Lucas Stach <l.stach@pengutronix.de>
> Cc: dri-devel@lists.freedesktop.org
> Cc: linux-kernel@vger.kernel.org

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
>  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 */

Patch
diff mbox series

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 */