[PATCH 2/2] drm/i915/dp_mst: Don't require DSC hblank quirk for a non-DSC compatible mode

[Kandpal, Suraj]

> -----Original Message-----
> From: Intel-gfx <intel-gfx-bounces at lists.freedesktop.org> On Behalf Of Imre
> Deak
> Sent: Wednesday, October 9, 2024 4:32 PM
> To: intel-gfx at lists.freedesktop.org
> Subject: [PATCH 2/2] drm/i915/dp_mst: Don't require DSC hblank quirk for a
> non-DSC compatible mode
> 
> If an MST branch device doesn't support DSC for a given mode, but the MST
> link has enough BW for the mode, assume that the branch device does
> support the mode using an uncompressed stream.
> 
> Signed-off-by: Imre Deak <imre.deak at intel.com>

LGTM,
Reviewed-by: Suraj Kandpal <suraj.kandpal at intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_dp_mst.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c
> b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> index 2822ae1160034..1a2ff3e1cb68f 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> @@ -467,6 +467,9 @@ hblank_expansion_quirk_needs_dsc(const struct
> intel_connector *connector,
>  	if (mode_hblank_period_ns(adjusted_mode) > hblank_limit)
>  		return false;
> 
> +	if (!intel_dp_mst_dsc_get_slice_count(connector, crtc_state))
> +		return false;
> +
>  	return true;
>  }
> 
> --
> 2.44.2