[PATCH] drm/amdgpu/display: disable eDP fast boot optimization on DCE8

[Harry Wentland]

On 2018-08-16 04:38 PM, Alex Deucher wrote:
> Seems to cause blank screens.
> 
> Bug: https://bugs.freedesktop.org/show_bug.cgi?id=106940
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>

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

Harry

> ---
>  drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
> index 350ee3e3e34d..2e3f85ceeaa9 100644
> --- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
> +++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
> @@ -1562,7 +1562,13 @@ void dce110_enable_accelerated_mode(struct dc *dc, struct dc_state *context)
>  	bool can_eDP_fast_boot_optimize = false;
>  
>  	if (edp_link) {
> -		can_eDP_fast_boot_optimize =
> +		/* this seems to cause blank screens on DCE8 */
> +		if ((dc->ctx->dce_version == DCE_VERSION_8_0) ||
> +		    (dc->ctx->dce_version == DCE_VERSION_8_1) ||
> +		    (dc->ctx->dce_version == DCE_VERSION_8_3))
> +			can_eDP_fast_boot_optimize = false;
> +		else
> +			can_eDP_fast_boot_optimize =
>  				edp_link->link_enc->funcs->is_dig_enabled(edp_link->link_enc);
>  	}
>  
>