[PATCH] media: venus: drop bogus probe deferrals

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* [PATCH] media: venus: drop bogus probe deferrals
@ 2025-10-17  5:58 ` Johan Hovold
  2025-10-17 11:40   ` Bryan O'Donoghue
                     ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: Johan Hovold @ 2025-10-17  5:58 UTC (permalink / raw)
  To: Vikash Garodia, Dikshita Agarwal, Bryan ODonoghue
  Cc: Mauro Carvalho Chehab, linux-media, linux-kernel, Johan Hovold

The encoder and decoder platform devices are registered by the venus
driver as children of the venus device, but even if someone were to mess
this up no amount of probe deferring is going to conjure up a parent.

Relatedly, the venus driver sets its driver data before registering the
child devices and if this ever breaks we want to learn about it by
failing probe.

Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/media/platform/qcom/venus/vdec.c | 5 +----
 drivers/media/platform/qcom/venus/venc.c | 5 +----
 2 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c
index 55c27345b7d8..2d822ad86dce 100644
--- a/drivers/media/platform/qcom/venus/vdec.c
+++ b/drivers/media/platform/qcom/venus/vdec.c
@@ -1778,12 +1778,9 @@ static int vdec_probe(struct platform_device *pdev)
 	struct venus_core *core;
 	int ret;
 
-	if (!dev->parent)
-		return -EPROBE_DEFER;
-
 	core = dev_get_drvdata(dev->parent);
 	if (!core)
-		return -EPROBE_DEFER;
+		return -EINVAL;
 
 	platform_set_drvdata(pdev, core);
 
diff --git a/drivers/media/platform/qcom/venus/venc.c b/drivers/media/platform/qcom/venus/venc.c
index fba07557a399..f1abd2bdce6b 100644
--- a/drivers/media/platform/qcom/venus/venc.c
+++ b/drivers/media/platform/qcom/venus/venc.c
@@ -1560,12 +1560,9 @@ static int venc_probe(struct platform_device *pdev)
 	struct venus_core *core;
 	int ret;
 
-	if (!dev->parent)
-		return -EPROBE_DEFER;
-
 	core = dev_get_drvdata(dev->parent);
 	if (!core)
-		return -EPROBE_DEFER;
+		return -EINVAL;
 
 	platform_set_drvdata(pdev, core);
 
-- 
2.49.1


^ permalink raw reply related	[flat|nested] 4+ messages in thread

* Re: [PATCH] media: venus: drop bogus probe deferrals
  2025-10-17  5:58 ` [PATCH] media: venus: drop bogus probe deferrals Johan Hovold
@ 2025-10-17 11:40   ` Bryan O'Donoghue
  2025-10-28 10:43   ` Dikshita Agarwal
  2025-10-28 12:36   ` Vikash Garodia
  2 siblings, 0 replies; 4+ messages in thread
From: Bryan O'Donoghue @ 2025-10-17 11:40 UTC (permalink / raw)
  To: Johan Hovold, Vikash Garodia, Dikshita Agarwal
  Cc: Mauro Carvalho Chehab, linux-media, linux-kernel

On 17/10/2025 06:58, Johan Hovold wrote:
> The encoder and decoder platform devices are registered by the venus
> driver as children of the venus device, but even if someone were to mess
> this up no amount of probe deferring is going to conjure up a parent.
> 
> Relatedly, the venus driver sets its driver data before registering the
> child devices and if this ever breaks we want to learn about it by
> failing probe.
> 
> Signed-off-by: Johan Hovold <johan@kernel.org>
> ---
>   drivers/media/platform/qcom/venus/vdec.c | 5 +----
>   drivers/media/platform/qcom/venus/venc.c | 5 +----
>   2 files changed, 2 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c
> index 55c27345b7d8..2d822ad86dce 100644
> --- a/drivers/media/platform/qcom/venus/vdec.c
> +++ b/drivers/media/platform/qcom/venus/vdec.c
> @@ -1778,12 +1778,9 @@ static int vdec_probe(struct platform_device *pdev)
>   	struct venus_core *core;
>   	int ret;
> 
> -	if (!dev->parent)
> -		return -EPROBE_DEFER;
> -
>   	core = dev_get_drvdata(dev->parent);
>   	if (!core)
> -		return -EPROBE_DEFER;
> +		return -EINVAL;
> 
>   	platform_set_drvdata(pdev, core);
> 
> diff --git a/drivers/media/platform/qcom/venus/venc.c b/drivers/media/platform/qcom/venus/venc.c
> index fba07557a399..f1abd2bdce6b 100644
> --- a/drivers/media/platform/qcom/venus/venc.c
> +++ b/drivers/media/platform/qcom/venus/venc.c
> @@ -1560,12 +1560,9 @@ static int venc_probe(struct platform_device *pdev)
>   	struct venus_core *core;
>   	int ret;
> 
> -	if (!dev->parent)
> -		return -EPROBE_DEFER;
> -
>   	core = dev_get_drvdata(dev->parent);
>   	if (!core)
> -		return -EPROBE_DEFER;
> +		return -EINVAL;
> 
>   	platform_set_drvdata(pdev, core);
> 
> --
> 2.49.1
> 
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [PATCH] media: venus: drop bogus probe deferrals
  2025-10-17  5:58 ` [PATCH] media: venus: drop bogus probe deferrals Johan Hovold
  2025-10-17 11:40   ` Bryan O'Donoghue
@ 2025-10-28 10:43   ` Dikshita Agarwal
  2025-10-28 12:36   ` Vikash Garodia
  2 siblings, 0 replies; 4+ messages in thread
From: Dikshita Agarwal @ 2025-10-28 10:43 UTC (permalink / raw)
  To: Johan Hovold, Vikash Garodia, Dikshita Agarwal, Bryan ODonoghue
  Cc: Mauro Carvalho Chehab, linux-media, linux-kernel



On 10/17/2025 11:28 AM, Johan Hovold wrote:
> The encoder and decoder platform devices are registered by the venus
> driver as children of the venus device, but even if someone were to mess
> this up no amount of probe deferring is going to conjure up a parent.
> 
> Relatedly, the venus driver sets its driver data before registering the
> child devices and if this ever breaks we want to learn about it by
> failing probe.
> 
> Signed-off-by: Johan Hovold <johan@kernel.org>
> ---
>  drivers/media/platform/qcom/venus/vdec.c | 5 +----
>  drivers/media/platform/qcom/venus/venc.c | 5 +----
>  2 files changed, 2 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c
> index 55c27345b7d8..2d822ad86dce 100644
> --- a/drivers/media/platform/qcom/venus/vdec.c
> +++ b/drivers/media/platform/qcom/venus/vdec.c
> @@ -1778,12 +1778,9 @@ static int vdec_probe(struct platform_device *pdev)
>  	struct venus_core *core;
>  	int ret;
>  
> -	if (!dev->parent)
> -		return -EPROBE_DEFER;
> -
>  	core = dev_get_drvdata(dev->parent);
>  	if (!core)
> -		return -EPROBE_DEFER;
> +		return -EINVAL;
>  
>  	platform_set_drvdata(pdev, core);
>  
> diff --git a/drivers/media/platform/qcom/venus/venc.c b/drivers/media/platform/qcom/venus/venc.c
> index fba07557a399..f1abd2bdce6b 100644
> --- a/drivers/media/platform/qcom/venus/venc.c
> +++ b/drivers/media/platform/qcom/venus/venc.c
> @@ -1560,12 +1560,9 @@ static int venc_probe(struct platform_device *pdev)
>  	struct venus_core *core;
>  	int ret;
>  
> -	if (!dev->parent)
> -		return -EPROBE_DEFER;
> -
>  	core = dev_get_drvdata(dev->parent);
>  	if (!core)
> -		return -EPROBE_DEFER;
> +		return -EINVAL;
>  
>  	platform_set_drvdata(pdev, core);
>  

Reviewed-by: Dikshita Agarwal <dikshita.agarwal@oss.qualcomm.com>

Thanks,
Dikshita

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [PATCH] media: venus: drop bogus probe deferrals
  2025-10-17  5:58 ` [PATCH] media: venus: drop bogus probe deferrals Johan Hovold
  2025-10-17 11:40   ` Bryan O'Donoghue
  2025-10-28 10:43   ` Dikshita Agarwal
@ 2025-10-28 12:36   ` Vikash Garodia
  2 siblings, 0 replies; 4+ messages in thread
From: Vikash Garodia @ 2025-10-28 12:36 UTC (permalink / raw)
  To: Johan Hovold, Dikshita Agarwal, Bryan ODonoghue
  Cc: Mauro Carvalho Chehab, linux-media, linux-kernel


On 10/17/2025 11:28 AM, Johan Hovold wrote:
> The encoder and decoder platform devices are registered by the venus
> driver as children of the venus device, but even if someone were to mess
> this up no amount of probe deferring is going to conjure up a parent.
> 
> Relatedly, the venus driver sets its driver data before registering the
> child devices and if this ever breaks we want to learn about it by
> failing probe.
> 
> Signed-off-by: Johan Hovold <johan@kernel.org>


Reviewed-by: Vikash Garodia <vikash.garodia@oss.qualcomm.com>

^ permalink raw reply	[flat|nested] 4+ messages in thread

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2025-10-17  5:58 ` [PATCH] media: venus: drop bogus probe deferrals Johan Hovold
2025-10-17 11:40   ` Bryan O'Donoghue
2025-10-28 10:43   ` Dikshita Agarwal
2025-10-28 12:36   ` Vikash Garodia

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