[PATCH 04/29] drm/amd/display: fix dpms_off issue when disabling bios mode

[Mike Lothian]

On Wed, 9 Nov 2022 at 06:15, Tom Chung <chiahsuan.chung at amd.com> wrote:
>
> From: Zhongwei Zhang <Zhongwei.Zhang at amd.com>
>
> [Why]
> disable_vbios_mode_if_required() will set dpms_off to false
> during boot when pixel clk dismatches with driver requires.
> This will cause extra backlight on and off if OS call 2
> times setmode.
>
> [How]
> Set dpms_off to true to keep power_off and
> let OS control BL by display's powerState.
>
> Reviewed-by: Aric Cyr <Aric.Cyr at amd.com>
> Acked-by: Tom Chung <chiahsuan.chung at amd.com>
> Signed-off-by: Zhongwei Zhang <Zhongwei.Zhang at amd.com>
> ---
>  drivers/gpu/drm/amd/display/dc/core/dc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
> index 9c3704c4d7e4..9f42adc234e3 100644
> --- a/drivers/gpu/drm/amd/display/dc/core/dc.c
> +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
> @@ -1192,7 +1192,7 @@ static void disable_vbios_mode_if_required(
>
>                                         if (pix_clk_100hz != requested_pix_clk_100hz) {
>                                                 core_link_disable_stream(pipe);
> -                                               pipe->stream->dpms_off = false;
> +                                               pipe->stream->dpms_off = true;
>                                         }
>                                 }
>                         }
> --
> 2.25.1
>

Hi, this patch gives me a blank screen when booting my Asus G513QY /
6800M. apart from the screen being of I can ssh in just fine

Reverting it puts things back to normal

Cheers

Mike