2017-06-09 09:23:13

by Hoegeun Kwon

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

The bridge_node is unnecessary between FIMD and DSIM. If don't remove
error handling, it will not work between FIMD and DSIM. So remove
error handling.

Signed-off-by: Hoegeun Kwon <[email protected]>
---
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

2017-06-13 09:25:56

by 대인기/Tizen Platform Lab(SR)/삼성전자

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

2017년 06월 09일 18:23에 Hoegeun Kwon 이(가) 쓴 글:
> The bridge_node is unnecessary between FIMD and DSIM. If don't remove
> error handling, it will not work between FIMD and DSIM. So remove
> error handling.

Please make sure to describe why bridge_node is unnecessary.
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.

Thanks,
Inki Dae

>
> Signed-off-by: Hoegeun Kwon <[email protected]>
> ---
> 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;
> }
>

2017-06-13 10:33:34

by Hoegeun Kwon

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

On 06/13/2017 06:25 PM, Inki Dae wrote:
>
> 2017년 06월 09일 18:23에 Hoegeun Kwon 이(가) 쓴 글:
>> The bridge_node is unnecessary between FIMD and DSIM. If don't remove
>> error handling, it will not work between FIMD and DSIM. So remove
>> error handling.
> Please make sure to describe why bridge_node is unnecessary.
> 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.
>
> Thanks,
> Inki Dae

Remove the error handling for bridge_node because the bridge_node is
required optionally. It has already been described in commit message.

For example,
In case of Exynos 3250 SoC, no bridge_node is required between FIMD
and MIPI DSI.

Best regards,
Hoegeun

>
>> Signed-off-by: Hoegeun Kwon <[email protected]>
>> ---
>> 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;
>> }
>>
>