[PATCH v2] drm/amd/display: Convert 10kHz clks from PPLib into kHz for Vega

[Nicholas Kazlauskas]

This does get called from both dce120 and dce112, but it will also any 
fix any problems for dce112 as well. Looks fine to me.

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas at amd.com>

Nicholas Kazlauskas

On 07/12/2018 10:09 AM, Harry Wentland wrote:
> The driver is expecting clock frequency in kHz, while SMU returns
> the values in 10kHz, which causes the bandwidth validation to fail
> 
> 4.18 has the faulty clock assignment in pp_to_dc_clock_levels_with_latency
> only, which is only used by Vega. Make sure we multiply these values
> by 10 here, as we do for other ASICs as powerplay assigned them
> wrong. 4.19 has the proper fix in powerplay.
> 
> v2: Add Fixes tag
> 
> Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=107082
> 
> Signed-off-by: Mikita Lipski <mikita.lipski at amd.com>
> Signed-off-by: Harry Wentland <harry.wentland at amd.com>
> ---
>   drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_services.c | 5 +++--
>   1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_services.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_services.c
> index 5a3346124a01..5a2e952c5bea 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_services.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_services.c
> @@ -255,8 +255,9 @@ static void pp_to_dc_clock_levels_with_latency(
>   			DC_DECODE_PP_CLOCK_TYPE(dc_clk_type));
>   
>   	for (i = 0; i < clk_level_info->num_levels; i++) {
> -		DRM_DEBUG("DM_PPLIB:\t %d\n", pp_clks->data[i].clocks_in_khz);
> -		clk_level_info->data[i].clocks_in_khz = pp_clks->data[i].clocks_in_khz;
> +		DRM_DEBUG("DM_PPLIB:\t %d in 10kHz\n", pp_clks->data[i].clocks_in_khz);
> +		/* translate 10kHz to kHz */
> +		clk_level_info->data[i].clocks_in_khz = pp_clks->data[i].clocks_in_khz * 10;
>   		clk_level_info->data[i].latency_in_us = pp_clks->data[i].latency_in_us;
>   	}
>   }
>