linux-kernel - Re: [PATCH 6/7] drm/amd/powerplay: Use proper enums in vega20_print_clk

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Date:   Mon, 15 Jul 2019 11:25:29 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Nathan Chancellor <natechancellor@...il.com>
Cc:     Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        "David (ChunMing) Zhou" <David1.Zhou@....com>,
        Harry Wentland <harry.wentland@....com>,
        Leo Li <sunpeng.li@....com>, Rex Zhu <rex.zhu@....com>,
        Evan Quan <evan.quan@....com>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Kevin Wang <kevin1.wang@....com>
Subject: Re: [PATCH 6/7] drm/amd/powerplay: Use proper enums in vega20_print_clk_levels

On Thu, Jul 4, 2019 at 7:52 AM Nathan Chancellor
<natechancellor@...il.com> wrote:
>
> clang warns:
>
> drivers/gpu/drm/amd/amdgpu/../powerplay/vega20_ppt.c:995:39: warning:
> implicit conversion from enumeration type 'PPCLK_e' to different
> enumeration type 'enum smu_clk_type' [-Wenum-conversion]
>                 ret = smu_get_current_clk_freq(smu, PPCLK_SOCCLK, &now);
>                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
> drivers/gpu/drm/amd/amdgpu/../powerplay/vega20_ppt.c:1016:39: warning:
> implicit conversion from enumeration type 'PPCLK_e' to different
> enumeration type 'enum smu_clk_type' [-Wenum-conversion]
>                 ret = smu_get_current_clk_freq(smu, PPCLK_FCLK, &now);
>                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
> drivers/gpu/drm/amd/amdgpu/../powerplay/vega20_ppt.c:1031:39: warning:
> implicit conversion from enumeration type 'PPCLK_e' to different
> enumeration type 'enum smu_clk_type' [-Wenum-conversion]
>                 ret = smu_get_current_clk_freq(smu, PPCLK_DCEFCLK, &now);
>                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
>
> The values are mapped one to one in vega20_get_smu_clk_index so just use
> the proper enums here.
>
> Fixes: 096761014227 ("drm/amd/powerplay: support sysfs to get socclk, fclk, dcefclk")
> Link: https://github.com/ClangBuiltLinux/linux/issues/587
> Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
> ---

Adding Kevin Wang for further review, as he sent a related patch in
d36893362d22 ("drm/amd/powerplay: fix smu clock type change miss error")

I assume this one is still required as it triggers the same warning.
Kevin, can you have a look?

      Arnd

>  drivers/gpu/drm/amd/powerplay/vega20_ppt.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/powerplay/vega20_ppt.c b/drivers/gpu/drm/amd/powerplay/vega20_ppt.c
> index 0f14fe14ecd8..e62dd6919b24 100644
> --- a/drivers/gpu/drm/amd/powerplay/vega20_ppt.c
> +++ b/drivers/gpu/drm/amd/powerplay/vega20_ppt.c
> @@ -992,7 +992,7 @@ static int vega20_print_clk_levels(struct smu_context *smu,
>                 break;
>
>         case SMU_SOCCLK:
> -               ret = smu_get_current_clk_freq(smu, PPCLK_SOCCLK, &now);
> +               ret = smu_get_current_clk_freq(smu, SMU_SOCCLK, &now);
>                 if (ret) {
>                         pr_err("Attempt to get current socclk Failed!");
>                         return ret;
> @@ -1013,7 +1013,7 @@ static int vega20_print_clk_levels(struct smu_context *smu,
>                 break;
>
>         case SMU_FCLK:
> -               ret = smu_get_current_clk_freq(smu, PPCLK_FCLK, &now);
> +               ret = smu_get_current_clk_freq(smu, SMU_FCLK, &now);
>                 if (ret) {
>                         pr_err("Attempt to get current fclk Failed!");
>                         return ret;
> @@ -1028,7 +1028,7 @@ static int vega20_print_clk_levels(struct smu_context *smu,
>                 break;
>
>         case SMU_DCEFCLK:
> -               ret = smu_get_current_clk_freq(smu, PPCLK_DCEFCLK, &now);
> +               ret = smu_get_current_clk_freq(smu, SMU_DCEFCLK, &now);
>                 if (ret) {
>                         pr_err("Attempt to get current dcefclk Failed!");
>                         return ret;