[v2] drm/bridge: sii9234: use extcon to detect cable attachment

[PATCH v2 2/3] drm/bridge: sii9234: use dev_err_probe where applicable

Posted by Henrik Grimler 6 months, 2 weeks ago

In case of error during resource acquisition the driver should print
an error message only if it is not deferred probe. Use dev_err_probe
helper to handle this, which will also record defer probe reason for
debugging.

Signed-off-by: Henrik Grimler <henrik@grimler.se>
---
v2: no changes
---
 drivers/gpu/drm/bridge/sii9234.c | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/bridge/sii9234.c b/drivers/gpu/drm/bridge/sii9234.c
index 930117bbba87285e62107389606897740516eb0a..0e0bb1bf71fdcef788715cfd6fa158a6992def33 100644
--- a/drivers/gpu/drm/bridge/sii9234.c
+++ b/drivers/gpu/drm/bridge/sii9234.c
@@ -825,10 +825,9 @@ static int sii9234_init_resources(struct sii9234 *ctx,
 	}
 
 	ctx->gpio_reset = devm_gpiod_get(ctx->dev, "reset", GPIOD_OUT_LOW);
-	if (IS_ERR(ctx->gpio_reset)) {
-		dev_err(ctx->dev, "failed to get reset gpio from DT\n");
-		return PTR_ERR(ctx->gpio_reset);
-	}
+	if (IS_ERR(ctx->gpio_reset))
+		return dev_err_probe(ctx->dev, PTR_ERR(ctx->gpio_reset),
+				     "failed to get reset gpio from DT\n");
 
 	ctx->supplies[0].supply = "avcc12";
 	ctx->supplies[1].supply = "avcc33";
@@ -836,9 +835,7 @@ static int sii9234_init_resources(struct sii9234 *ctx,
 	ctx->supplies[3].supply = "cvcc12";
 	ret = devm_regulator_bulk_get(ctx->dev, 4, ctx->supplies);
 	if (ret) {
-		if (ret != -EPROBE_DEFER)
-			dev_err(ctx->dev, "regulator_bulk failed\n");
-		return ret;
+		dev_err_probe(ctx->dev, ret, "regulator_bulk failed\n");
 	}
 
 	ctx->client[I2C_MHL] = client;
@@ -911,10 +908,9 @@ static int sii9234_probe(struct i2c_client *client)
 					sii9234_irq_thread,
 					IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
 					"sii9234", ctx);
-	if (ret < 0) {
-		dev_err(dev, "failed to install IRQ handler\n");
-		return ret;
-	}
+	if (ret < 0)
+		return dev_err_probe(dev, ret,
+				     "failed to install IRQ handler\n");
 
 	ret = sii9234_init_resources(ctx, client);
 	if (ret < 0)

-- 
2.50.1

Re: [PATCH v2 2/3] drm/bridge: sii9234: use dev_err_probe where applicable

Posted by Dmitry Baryshkov 6 months, 2 weeks ago

On Thu, Jul 24, 2025 at 08:50:52PM +0200, Henrik Grimler wrote:
> In case of error during resource acquisition the driver should print
> an error message only if it is not deferred probe. Use dev_err_probe
> helper to handle this, which will also record defer probe reason for
> debugging.
> 
> Signed-off-by: Henrik Grimler <henrik@grimler.se>
> ---
> v2: no changes
> ---
>  drivers/gpu/drm/bridge/sii9234.c | 18 +++++++-----------
>  1 file changed, 7 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/sii9234.c b/drivers/gpu/drm/bridge/sii9234.c
> index 930117bbba87285e62107389606897740516eb0a..0e0bb1bf71fdcef788715cfd6fa158a6992def33 100644
> --- a/drivers/gpu/drm/bridge/sii9234.c
> +++ b/drivers/gpu/drm/bridge/sii9234.c
> @@ -825,10 +825,9 @@ static int sii9234_init_resources(struct sii9234 *ctx,
>  	}
>  
>  	ctx->gpio_reset = devm_gpiod_get(ctx->dev, "reset", GPIOD_OUT_LOW);
> -	if (IS_ERR(ctx->gpio_reset)) {
> -		dev_err(ctx->dev, "failed to get reset gpio from DT\n");
> -		return PTR_ERR(ctx->gpio_reset);
> -	}
> +	if (IS_ERR(ctx->gpio_reset))
> +		return dev_err_probe(ctx->dev, PTR_ERR(ctx->gpio_reset),
> +				     "failed to get reset gpio from DT\n");
>  
>  	ctx->supplies[0].supply = "avcc12";
>  	ctx->supplies[1].supply = "avcc33";
> @@ -836,9 +835,7 @@ static int sii9234_init_resources(struct sii9234 *ctx,
>  	ctx->supplies[3].supply = "cvcc12";
>  	ret = devm_regulator_bulk_get(ctx->dev, 4, ctx->supplies);
>  	if (ret) {
> -		if (ret != -EPROBE_DEFER)
> -			dev_err(ctx->dev, "regulator_bulk failed\n");
> -		return ret;
> +		dev_err_probe(ctx->dev, ret, "regulator_bulk failed\n");

Drop the braces, use 'return dev_err_probe(...)'

>  	}
>  
>  	ctx->client[I2C_MHL] = client;
> @@ -911,10 +908,9 @@ static int sii9234_probe(struct i2c_client *client)
>  					sii9234_irq_thread,
>  					IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
>  					"sii9234", ctx);
> -	if (ret < 0) {
> -		dev_err(dev, "failed to install IRQ handler\n");
> -		return ret;
> -	}
> +	if (ret < 0)
> +		return dev_err_probe(dev, ret,
> +				     "failed to install IRQ handler\n");
>  
>  	ret = sii9234_init_resources(ctx, client);
>  	if (ret < 0)
> 
> -- 
> 2.50.1
> 

-- 
With best wishes
Dmitry

Re: [PATCH v2 2/3] drm/bridge: sii9234: use dev_err_probe where applicable

Posted by Henrik Grimler 6 months, 2 weeks ago

Hi Dmitry,

On Sun, Jul 27, 2025 at 07:38:12PM +0300, Dmitry Baryshkov wrote:
> On Thu, Jul 24, 2025 at 08:50:52PM +0200, Henrik Grimler wrote:
> > In case of error during resource acquisition the driver should print
> > an error message only if it is not deferred probe. Use dev_err_probe
> > helper to handle this, which will also record defer probe reason for
> > debugging.
[...]
> > @@ -836,9 +835,7 @@ static int sii9234_init_resources(struct sii9234 *ctx,
> >  	ctx->supplies[3].supply = "cvcc12";
> >  	ret = devm_regulator_bulk_get(ctx->dev, 4, ctx->supplies);
> >  	if (ret) {
> > -		if (ret != -EPROBE_DEFER)
> > -			dev_err(ctx->dev, "regulator_bulk failed\n");
> > -		return ret;
> > +		dev_err_probe(ctx->dev, ret, "regulator_bulk failed\n");
> 
> Drop the braces, use 'return dev_err_probe(...)'
> 
> >  	}
> >  
> >  	ctx->client[I2C_MHL] = client;

Thanks for reviewing and spotting that, will fix in next version!

Best regards,
Henrik Grimler