linux-kernel - Re: [PATCH] drm/amd/display: remove unused variables otg

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Date:   Thu, 20 Apr 2023 10:19:05 -0400
From:   Hamza Mahfooz <hamza.mahfooz@....com>
To:     Tom Rix <trix@...hat.com>, harry.wentland@....com,
        sunpeng.li@....com, Rodrigo.Siqueira@....com,
        alexander.deucher@....com, christian.koenig@....com,
        Xinhui.Pan@....com, airlied@...il.com, daniel@...ll.ch,
        qingqing.zhuo@....com, wenjing.liu@....com, Jun.Lei@....com,
        Josip.Pavic@....com, Leon.Huang1@....com,
        Nicholas.Kazlauskas@....com
Cc:     dri-devel@...ts.freedesktop.org, amd-gfx@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/amd/display: remove unused variables otg_inst and cmd


On 4/19/23 22:04, Tom Rix wrote:
> gcc reports
> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn21/dcn21_hwseq.c:
>    In function ‘dcn21_set_backlight_level’:
> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn21/dcn21_hwseq.c:229:18:
>    error: unused variable ‘otg_inst’ [-Werror=unused-variable]
>    229 |         uint32_t otg_inst = pipe_ctx->stream_res.tg->inst;
>        |                  ^~~~~~~~
> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn21/dcn21_hwseq.c:226:27:
>    error: unused variable ‘cmd’ [-Werror=unused-variable]
>    226 |         union dmub_rb_cmd cmd;
>        |                           ^~~
> 
> These variables are not used, so remove them.
> 
> Fixes: e97cc04fe0fb ("drm/amd/display: refactor dmub commands into single function")
> Signed-off-by: Tom Rix <trix@...hat.com>

This has already been fixed, as of commit 1adb4dd5bd4b
("drm/amd/display: Remove unused variables in dcn21_hwseq.c") in
amd-staging-drm-next.

> ---
>   drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c | 2 --
>   1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c
> index 55a464a39529..43463d08f21b 100644
> --- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c
> +++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c
> @@ -223,10 +223,8 @@ bool dcn21_set_backlight_level(struct pipe_ctx *pipe_ctx,
>   		uint32_t backlight_pwm_u16_16,
>   		uint32_t frame_ramp)
>   {
> -	union dmub_rb_cmd cmd;
>   	struct dc_context *dc = pipe_ctx->stream->ctx;
>   	struct abm *abm = pipe_ctx->stream_res.abm;
> -	uint32_t otg_inst = pipe_ctx->stream_res.tg->inst;
>   	struct panel_cntl *panel_cntl = pipe_ctx->stream->link->panel_cntl;
>   
>   	if (dc->dc->res_pool->dmcu) {
-- 
Hamza