[v3,02/15] drm/bridge: tc358767: Simplify polling in tc_main_link_setup()
diff mbox series

Message ID 20190605070507.11417-3-andrew.smirnov@gmail.com
State New
Headers show
Series
  • tc358767 driver improvements
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Commit Message

Andrey Smirnov June 5, 2019, 7:04 a.m. UTC
Replace explicit polling loop with equivalent call to
tc_poll_timeout() for brevity. 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: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Cory Tusar <cory.tusar@zii.aero>
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 | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

Comments

Andrzej Hajda June 6, 2019, 8 a.m. UTC | #1
On 05.06.2019 09:04, Andrey Smirnov wrote:
> Replace explicit polling loop with equivalent call to
> tc_poll_timeout() for brevity. 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: Tomi Valkeinen <tomi.valkeinen@ti.com>
> Cc: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
> Cc: Philipp Zabel <p.zabel@pengutronix.de>
> Cc: Cory Tusar <cory.tusar@zii.aero>
> 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 | 15 +++++----------
>  1 file changed, 5 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
> index fb8a1942ec54..5e1e73a91696 100644
> --- a/drivers/gpu/drm/bridge/tc358767.c
> +++ b/drivers/gpu/drm/bridge/tc358767.c
> @@ -774,7 +774,6 @@ static int tc_main_link_enable(struct tc_data *tc)
>  	struct device *dev = tc->dev;
>  	unsigned int rate;
>  	u32 dp_phy_ctrl;
> -	int timeout;
>  	u32 value;
>  	int ret;
>  	u8 tmp[8];
> @@ -831,15 +830,11 @@ static int tc_main_link_enable(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) {
> -		dev_err(dev, "timeout waiting for phy become ready");
> -		return -ETIMEDOUT;
> +	ret = tc_poll_timeout(tc, DP_PHY_CTRL, PHY_RDY, PHY_RDY, 1, 1000);
> +	if (ret) {
> +		if (ret == -ETIMEDOUT)
> +			dev_err(dev, "timeout waiting for phy become ready");
> +		return ret;


Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>

 --
Regards
Andrzej


>  	}
>  
>  	/* 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 fb8a1942ec54..5e1e73a91696 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -774,7 +774,6 @@  static int tc_main_link_enable(struct tc_data *tc)
 	struct device *dev = tc->dev;
 	unsigned int rate;
 	u32 dp_phy_ctrl;
-	int timeout;
 	u32 value;
 	int ret;
 	u8 tmp[8];
@@ -831,15 +830,11 @@  static int tc_main_link_enable(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) {
-		dev_err(dev, "timeout waiting for phy become ready");
-		return -ETIMEDOUT;
+	ret = tc_poll_timeout(tc, DP_PHY_CTRL, PHY_RDY, PHY_RDY, 1, 1000);
+	if (ret) {
+		if (ret == -ETIMEDOUT)
+			dev_err(dev, "timeout waiting for phy become ready");
+		return ret;
 	}
 
 	/* Set misc: 8 bits per color */