[Intel-gfx] [v3] drm/i915/dsc: Fix bigjoiner check in dsc_disable

[Navare, Manasi]

On Tue, Jun 08, 2021 at 09:36:59AM +0530, Vandita Kulkarni wrote:
> This change takes care of resetting the dss_ctl registers
> in case of dsc_disable, bigjoiner disable and also
> uncompressed joiner disable.
> 
> v2: Fix formatting
> v3: Fix the typo (Mansi)
> 
> Suggested-by: Jani Nikula <jani.nikula at intel.com>
> Fixes: d961eb20adb6 (drm/i915/bigjoiner: atomic commit changes for uncompressed joiner)
> Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/3537
> Signed-off-by: Vandita Kulkarni <vandita.kulkarni at intel.com>

Looks good to me with this fix

Reviewed-by: Manasi Navare <manasi.d.navare at intel.com>

Manasi

> ---
>  drivers/gpu/drm/i915/display/intel_vdsc.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
> index 19cd9531c115..7121b66bf96d 100644
> --- a/drivers/gpu/drm/i915/display/intel_vdsc.c
> +++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
> @@ -1161,12 +1161,12 @@ void intel_dsc_disable(const struct intel_crtc_state *old_crtc_state)
>  	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
>  	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
>  
> -	if (!(old_crtc_state->dsc.compression_enable &&
> -	      old_crtc_state->bigjoiner))
> -		return;
> -
> -	intel_de_write(dev_priv, dss_ctl1_reg(old_crtc_state), 0);
> -	intel_de_write(dev_priv, dss_ctl2_reg(old_crtc_state), 0);
> +	/* Disable only if either of them is enabled */
> +	if (old_crtc_state->dsc.compression_enable ||
> +	    old_crtc_state->bigjoiner) {
> +		intel_de_write(dev_priv, dss_ctl1_reg(old_crtc_state), 0);
> +		intel_de_write(dev_priv, dss_ctl2_reg(old_crtc_state), 0);
> +	}
>  }
>  
>  void intel_uncompressed_joiner_get_config(struct intel_crtc_state *crtc_state)
> -- 
> 2.21.0.5.gaeb582a
>