[PATCH] drm/amd/pp: Workaround flickering issue on RV

[Alex Deucher]

On Mon, May 14, 2018 at 4:06 AM, Rex Zhu <Rex.Zhu at amd.com> wrote:
> Screen flickering observed while running 1080p video using
> MPV_VAAPI/VDPAU with 4x4K at 60 monitors
>
> Need to set higher mclk in this configuration.
>
> Signed-off-by: Rex Zhu <Rex.Zhu at amd.com>

Probably longer term we need some sort of bandwidth calculation.

Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c
> index 26ee5ed..bce28e3 100644
> --- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c
> +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c
> @@ -601,7 +601,10 @@ static int smu10_dpm_force_dpm_level(struct pp_hwmgr *hwmgr,
>                                                 data->gfx_min_freq_limit/100);
>                 smum_send_msg_to_smc_with_parameter(hwmgr,
>                                                 PPSMC_MSG_SetHardMinFclkByFreq,
> +                                               hwmgr->display_config->num_display > 3 ?
> +                                               SMU10_UMD_PSTATE_PEAK_FCLK :
>                                                 SMU10_UMD_PSTATE_MIN_FCLK);
> +
>                 smum_send_msg_to_smc_with_parameter(hwmgr,
>                                                 PPSMC_MSG_SetHardMinSocclkByFreq,
>                                                 SMU10_UMD_PSTATE_MIN_SOCCLK);
> --
> 1.9.1
>
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