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Date:   Fri, 8 Jan 2021 16:00:04 -0500
From:   Alex Deucher <alexdeucher@...il.com>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     Leo Li <sunpeng.li@....com>,
        Maling list - DRI developers 
        <dri-devel@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Qinglang Miao <miaoqinglang@...wei.com>,
        David Airlie <airlied@...ux.ie>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>
Subject: Re: [PATCH 19/40] drm/amd/display/dc/bios/command_table: Remove
 unused variable

On Fri, Jan 8, 2021 at 3:15 PM Lee Jones <lee.jones@...aro.org> wrote:
>
> None of the surrounding code was removed just in case even a small
> fraction of it was functional.
>
> Fixes the following W=1 kernel build warning(s):
>
>  drivers/gpu/drm/amd/amdgpu/../display/dc/bios/command_table.c: In function ‘adjust_display_pll_v2’:
>  drivers/gpu/drm/amd/amdgpu/../display/dc/bios/command_table.c:1459:35: warning: variable ‘params’ set but not used [-Wunused-but-set-variable]
>
> Cc: Harry Wentland <harry.wentland@....com>
> Cc: Leo Li <sunpeng.li@....com>
> Cc: Alex Deucher <alexander.deucher@....com>
> Cc: "Christian König" <christian.koenig@....com>
> Cc: David Airlie <airlied@...ux.ie>
> Cc: Daniel Vetter <daniel@...ll.ch>
> Cc: Qinglang Miao <miaoqinglang@...wei.com>
> Cc: amd-gfx@...ts.freedesktop.org
> Cc: dri-devel@...ts.freedesktop.org
> Signed-off-by: Lee Jones <lee.jones@...aro.org>
> ---
>  drivers/gpu/drm/amd/display/dc/bios/command_table.c | 12 +++---------
>  1 file changed, 3 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/bios/command_table.c b/drivers/gpu/drm/amd/display/dc/bios/command_table.c
> index 070459e3e4070..dd893a1176979 100644
> --- a/drivers/gpu/drm/amd/display/dc/bios/command_table.c
> +++ b/drivers/gpu/drm/amd/display/dc/bios/command_table.c
> @@ -1456,20 +1456,14 @@ static enum bp_result adjust_display_pll_v2(
>         struct bp_adjust_pixel_clock_parameters *bp_params)
>  {

@Harry Wentland, this function looks like it's missing the call to
EXEC_BIOS_CMD_TABLE().  I just sent a patch to fix that up, although
I'm not sure if this function every gets used on any asics supported
by amdgpu, so maybe we can just drop it.

Alex


>         enum bp_result result = BP_RESULT_FAILURE;
> -       ADJUST_DISPLAY_PLL_PS_ALLOCATION params = { 0 };
>
>         /* We need to convert from KHz units into 10KHz units and then convert
>          * output pixel clock back 10KHz-->KHz */
>         uint32_t pixel_clock_10KHz_in = bp_params->pixel_clock / 10;
>
> -       params.usPixelClock = cpu_to_le16((uint16_t)(pixel_clock_10KHz_in));
> -       params.ucTransmitterID =
> -                       bp->cmd_helper->encoder_id_to_atom(
> -                                       dal_graphics_object_id_get_encoder_id(
> -                                                       bp_params->encoder_object_id));
> -       params.ucEncodeMode =
> -                       (uint8_t)bp->cmd_helper->encoder_mode_bp_to_atom(
> -                                       bp_params->signal_type, false);
> +       bp->cmd_helper->encoder_id_to_atom(
> +               dal_graphics_object_id_get_encoder_id(bp_params->encoder_object_id));
> +       bp->cmd_helper->encoder_mode_bp_to_atom(bp_params->signal_type, false);
>         return result;
>  }
>
> --
> 2.25.1
>
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> dri-devel@...ts.freedesktop.org
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