Compiling AMD GPU drivers displays a warning:

drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_optc.c:294:6: warning: no previous prototype for ‘optc3_wait_drr_doublebuffer_pending_clear’ [-Wmissing-prototypes]

Get rid of it by adding a function prototype

'optc3_wait_drr_doublebuffer_pending_clear(struct timing_generator *optc)' on drivers/gpu/drm/amd/display/dc/dcn30/dcn30_optc.h

Signed-off-by: Caio Novais <caionovais@usp.br>
---
 drivers/gpu/drm/amd/display/dc/dcn30/dcn30_optc.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_optc.h b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_optc.h
index fb06dc9a4893..2e3ba6e2f336 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_optc.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_optc.h
@@ -331,6 +331,8 @@ void optc3_lock_doublebuffer_enable(struct timing_generator *optc);
 
 void optc3_lock_doublebuffer_disable(struct timing_generator *optc);
 
+void optc3_wait_drr_doublebuffer_pending_clear(struct timing_generator *optc);
+
 void optc3_set_drr_trigger_window(struct timing_generator *optc,
 		uint32_t window_start, uint32_t window_end);
 
-- 
2.40.0

On 3/28/23 18:09, Caio Novais wrote:
> Compiling AMD GPU drivers displays a warning:
> 
> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_optc.c:294:6: warning: no previous prototype for ‘optc3_wait_drr_doublebuffer_pending_clear’ [-Wmissing-prototypes]
> 
> Get rid of it by adding a function prototype
> 
> 'optc3_wait_drr_doublebuffer_pending_clear(struct timing_generator *optc)' on drivers/gpu/drm/amd/display/dc/dcn30/dcn30_optc.h
> 
> Signed-off-by: Caio Novais <caionovais@usp.br>
> ---
>   drivers/gpu/drm/amd/display/dc/dcn30/dcn30_optc.h | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_optc.h b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_optc.h
> index fb06dc9a4893..2e3ba6e2f336 100644
> --- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_optc.h
> +++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_optc.h
> @@ -331,6 +331,8 @@ void optc3_lock_doublebuffer_enable(struct timing_generator *optc);
>   
>   void optc3_lock_doublebuffer_disable(struct timing_generator *optc);
>   
> +void optc3_wait_drr_doublebuffer_pending_clear(struct timing_generator *optc);

I would prefer if you marked the function as static instead, since it is
only used in dcn30_optc.c.

> +
>   void optc3_set_drr_trigger_window(struct timing_generator *optc,
>   		uint32_t window_start, uint32_t window_end);
>   

-- 
Hamza