[PATCH 1/2] drm/amd/display: Reorder detect_edp_sink_caps before link settings read.

[Harry Wentland]

On 2020-01-09 10:20 a.m., Mario Kleiner wrote:
> read_current_link_settings_on_detect() on eDP 1.4+ may use the
> edp_supported_link_rates table which is set up by
> detect_edp_sink_caps(), so that function needs to be called first.
> 
> Signed-off-by: Mario Kleiner <mario.kleiner.de at gmail.com>
> Cc: Martin Leung <martin.leung at amd.com>

Reviewed-by: Harry Wentland <harry.wentland at amd.com>

This also fixes our assumption that retrieve_link_cap is the first DPCD
reads we perform during detection.

Harry

> ---
>  drivers/gpu/drm/amd/display/dc/core/dc_link.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
> index cef8c1ba9797..5ea4a1675259 100644
> --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
> +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
> @@ -817,8 +817,8 @@ static bool dc_link_detect_helper(struct dc_link *link,
>  		}
>  
>  		case SIGNAL_TYPE_EDP: {
> -			read_current_link_settings_on_detect(link);
>  			detect_edp_sink_caps(link);
> +			read_current_link_settings_on_detect(link);
>  			sink_caps.transaction_type = DDC_TRANSACTION_TYPE_I2C_OVER_AUX;
>  			sink_caps.signal = SIGNAL_TYPE_EDP;
>  			break;
>