linux-kernel - Re: [PATCH] drm/amdgpu: cleanup coding style in amdgpu_atpx

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Message-ID: <CADnq5_NJp0GMSbwv4rYU=KYLxfY0EsKD10MdZ0k+YV3sGXabng@mail.gmail.com>
Date:   Tue, 6 Sep 2022 11:17:20 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     Jingyu Wang <jingyuwang_vip@....com>
Cc:     alexander.deucher@....com, christian.koenig@....com,
        Xinhui.Pan@....com, airlied@...ux.ie, daniel@...ll.ch,
        isabbasso@...eup.net, Rodrigo.Siqueira@....com,
        dri-devel@...ts.freedesktop.org, amd-gfx@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/amdgpu: cleanup coding style in amdgpu_atpx_handler.c

On Mon, Sep 5, 2022 at 2:29 AM Jingyu Wang <jingyuwang_vip@....com> wrote:
>
> Fix everything checkpatch.pl complained about in amdgpu_atpx_handler.c
>
> Signed-off-by: Jingyu Wang <jingyuwang_vip@....com>
> ---
>  .../gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c  | 27 +++++++++++--------
>  1 file changed, 16 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c
> index d6d986be906a..911d6a130ec5 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c
> @@ -74,24 +74,29 @@ struct atpx_mux {
>         u16 mux;
>  } __packed;
>
> -bool amdgpu_has_atpx(void) {
> +bool amdgpu_has_atpx(void)
> +{
>         return amdgpu_atpx_priv.atpx_detected;
>  }
>
> -bool amdgpu_has_atpx_dgpu_power_cntl(void) {
> +bool amdgpu_has_atpx_dgpu_power_cntl(void)
> +{
>         return amdgpu_atpx_priv.atpx.functions.power_cntl;
>  }
>
> -bool amdgpu_is_atpx_hybrid(void) {
> +bool amdgpu_is_atpx_hybrid(void)
> +{
>         return amdgpu_atpx_priv.atpx.is_hybrid;
>  }
>
> -bool amdgpu_atpx_dgpu_req_power_for_displays(void) {
> +bool amdgpu_atpx_dgpu_req_power_for_displays(void)
> +{
>         return amdgpu_atpx_priv.atpx.dgpu_req_power_for_displays;
>  }
>
>  #if defined(CONFIG_ACPI)
> -void *amdgpu_atpx_get_dhandle(void) {
> +void *amdgpu_atpx_get_dhandle(void)
> +{
>         return amdgpu_atpx_priv.dhandle;
>  }
>  #endif
> @@ -134,7 +139,7 @@ static union acpi_object *amdgpu_atpx_call(acpi_handle handle, int function,
>
>         /* Fail only if calling the method fails and ATPX is supported */
>         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
> -               printk("failed to evaluate ATPX got %s\n",
> +               DRM_WARN("failed to evaluate ATPX got %s\n",

I'm not sure these need to be warnings.  Also, please use the
dev_info() functions instead so we can tell which device on the system
is reporting the issue.

>                        acpi_format_exception(status));
>                 kfree(buffer.pointer);
>                 return NULL;
> @@ -190,7 +195,7 @@ static int amdgpu_atpx_validate(struct amdgpu_atpx *atpx)
>
>                 size = *(u16 *) info->buffer.pointer;
>                 if (size < 10) {
> -                       printk("ATPX buffer is too small: %zu\n", size);
> +                       DRM_WARN("ATPX buffer is too small: %zu\n", size);
>                         kfree(info);
>                         return -EINVAL;
>                 }
> @@ -223,11 +228,11 @@ static int amdgpu_atpx_validate(struct amdgpu_atpx *atpx)
>         atpx->is_hybrid = false;
>         if (valid_bits & ATPX_MS_HYBRID_GFX_SUPPORTED) {
>                 if (amdgpu_atpx_priv.quirks & AMDGPU_PX_QUIRK_FORCE_ATPX) {
> -                       printk("ATPX Hybrid Graphics, forcing to ATPX\n");
> +                       DRM_WARN("ATPX Hybrid Graphics, forcing to ATPX\n");
>                         atpx->functions.power_cntl = true;
>                         atpx->is_hybrid = false;
>                 } else {
> -                       printk("ATPX Hybrid Graphics\n");
> +                       DRM_WARN("ATPX Hybrid Graphics\n");

These are definitely not warnings.  Please use dev_info() here.

>                         /*
>                          * Disable legacy PM methods only when pcie port PM is usable,
>                          * otherwise the device might fail to power off or power on.
> @@ -269,7 +274,7 @@ static int amdgpu_atpx_verify_interface(struct amdgpu_atpx *atpx)
>
>         size = *(u16 *) info->buffer.pointer;
>         if (size < 8) {
> -               printk("ATPX buffer is too small: %zu\n", size);
> +               DRM_WARN("ATPX buffer is too small: %zu\n", size);
>                 err = -EINVAL;
>                 goto out;
>         }
> @@ -278,7 +283,7 @@ static int amdgpu_atpx_verify_interface(struct amdgpu_atpx *atpx)
>         memcpy(&output, info->buffer.pointer, size);
>
>         /* TODO: check version? */
> -       printk("ATPX version %u, functions 0x%08x\n",
> +       DRM_WARN("ATPX version %u, functions 0x%08x\n",

Same here.

>                output.version, output.function_bits);
>
>         amdgpu_atpx_parse_functions(&atpx->functions, output.function_bits);
>
> base-commit: e47eb90a0a9ae20b82635b9b99a8d0979b757ad8
> --
> 2.34.1
>