Re: [PATCH] drm/amd/display: fix dp_retrieve_lttpr_cap return code

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On 12/15/22 17:37, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@xxxxxxxx>
> 
> The dp_retrieve_lttpr_cap() return type changed from 'bool'
> to 'enum dc_status', so now the early 'return' uses the wrong
> type:
> 
> drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dp.c: In function 'dp_retrieve_lttpr_cap':
> drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dp.c:5075:24: error: implicit conversion from 'enum <anonymous>' to 'enum dc_status' [-Werror=enum-conversion]
>  5075 |                 return false;
>       |                        ^~~~~
> 
> Convert it to return 'DC_OK', which is the same value as 'false'.
> 
> Fixes: b473bd5fc333 ("drm/amd/display: refine wake up aux in retrieve link caps")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
> No idea if DC_OK is the intended return code, but it leaves the behavior
> unchanged and fixes the warning.
> ---
>  drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
> index af9411ee3c74..95dbfa4e996a 100644
> --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
> +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
> @@ -5095,7 +5095,7 @@ enum dc_status dp_retrieve_lttpr_cap(struct dc_link *link)
>  	bool vbios_lttpr_interop = link->dc->caps.vbios_lttpr_aware;
>  
>  	if (!vbios_lttpr_interop || !link->dc->caps.extended_aux_timeout_support)
> -		return false;
> +		return DC_OK;

		return status;

seems more appropriate. (Otherwise the status = DC_ERROR_UNEXPECTED initialization has no effect)


-- 
Earthling Michel Dänzer            |                  https://redhat.com
Libre software enthusiast          |         Mesa and Xwayland developer




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