[PATCH v2] drm/exynos/dsi: Remove error handling for bridge_node DT parsing

[PATCH v2] drm/exynos/dsi: Remove error handling for bridge_node DT parsing

[Hoegeun Kwon]

Remove the error handling of bridge_node because the bridge_node is
required optionally.

For example, In case of Exynos SoC, a bridge device such as mDNIe and
MIC could be placed between Display Controller and MIPI DSI device but
the bridge device is required optionally.

Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
---

Hi Inki and Tobias,

Thanks for your review.

Changes for V2:
- Modified the commit message in more detail than before.

Best Regards,
Hoegeun

 drivers/gpu/drm/exynos/exynos_drm_dsi.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index a11b795..6ee0dac 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -1651,8 +1651,6 @@ static int exynos_dsi_parse_dt(struct exynos_dsi *dsi)
 		return ret;
 
 	dsi->bridge_node = of_graph_get_remote_node(node, DSI_PORT_IN, 0);
-	if (!dsi->bridge_node)
-		return -EINVAL;
 
 	return 0;
 }
-- 
1.9.1

Re: [PATCH v2] drm/exynos/dsi: Remove error handling for bridge_node DT parsing

[Tobias Jakobi]

Hello Hoegeun,

my last question (does this regress the case "node required, but
absent") still stands.


Hoegeun Kwon wrote:
> Remove the error handling of bridge_node because the bridge_node is
> required optionally.
I don't think a construction like that exists. Either it's required, or
it's optional. "required optionally" makes no sense to me (but I'm not a
native speaker).

- Tobias


> For example, In case of Exynos SoC, a bridge device such as mDNIe and
> MIC could be placed between Display Controller and MIPI DSI device but
> the bridge device is required optionally.
> 
> Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
> ---
> 
> Hi Inki and Tobias,
> 
> Thanks for your review.
> 
> Changes for V2:
> - Modified the commit message in more detail than before.
> 
> Best Regards,
> Hoegeun
> 
>  drivers/gpu/drm/exynos/exynos_drm_dsi.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> index a11b795..6ee0dac 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> @@ -1651,8 +1651,6 @@ static int exynos_dsi_parse_dt(struct exynos_dsi *dsi)
>  		return ret;
>  
>  	dsi->bridge_node = of_graph_get_remote_node(node, DSI_PORT_IN, 0);
> -	if (!dsi->bridge_node)
> -		return -EINVAL;
>  
>  	return 0;
>  }
> 

Re: [PATCH v2] drm/exynos/dsi: Remove error handling for bridge_node DT parsing

[Hoegeun Kwon]

Hello Tobias,

Sorry for late reply.

On 06/14/2017 09:30 PM, Tobias Jakobi wrote:
> Hello Hoegeun,
>
> my last question (does this regress the case "node required, but
> absent") still stands.
>
>
> Hoegeun Kwon wrote:
>> Remove the error handling of bridge_node because the bridge_node is
>> required optionally.
> I don't think a construction like that exists. Either it's required, or
> it's optional. "required optionally" makes no sense to me (but I'm not a
> native speaker).
>
> - Tobias

The bridge_node is optional.
I will change commit message and send ver3 patch.

Best regards,
Hoegeun

>
>
>> For example, In case of Exynos SoC, a bridge device such as mDNIe and
>> MIC could be placed between Display Controller and MIPI DSI device but
>> the bridge device is required optionally.
>>
>> Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
>> ---
>>
>> Hi Inki and Tobias,
>>
>> Thanks for your review.
>>
>> Changes for V2:
>> - Modified the commit message in more detail than before.
>>
>> Best Regards,
>> Hoegeun
>>
>>   drivers/gpu/drm/exynos/exynos_drm_dsi.c | 2 --
>>   1 file changed, 2 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
>> index a11b795..6ee0dac 100644
>> --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
>> +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
>> @@ -1651,8 +1651,6 @@ static int exynos_dsi_parse_dt(struct exynos_dsi *dsi)
>>   		return ret;
>>   
>>   	dsi->bridge_node = of_graph_get_remote_node(node, DSI_PORT_IN, 0);
>> -	if (!dsi->bridge_node)
>> -		return -EINVAL;
>>   
>>   	return 0;
>>   }
>>
>
>
>