[PATCH 18/22] drm/i915: Handle joined pipes inside hsw_crtc_disable()

[Murthy, Arun R]

> -----Original Message-----
> From: Intel-gfx <intel-gfx-bounces at lists.freedesktop.org> On Behalf Of Ville
> Syrjala
> Sent: Friday, March 29, 2024 6:43 AM
> To: intel-gfx at lists.freedesktop.org
> Subject: [PATCH 18/22] drm/i915: Handle joined pipes inside hsw_crtc_disable()
> 
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> Reorganize the crtc disable path to only deal with the master pipes/transcoders
> in intel_old_crtc_state_disables() and offload the handling of joined pipes to
> hsw_crtc_disable().
> This makes the whole thing much more sensible since we can actually control
> the order in which we do the per-pipe vs.
> per-transcoder modeset steps.
> 
> v2: Use the name 'pipe_crtc' for the per-pipe crtc pointer
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_display.c | 64 ++++++++++++--------
>  1 file changed, 39 insertions(+), 25 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> index 58ee40786d5c..c15ea046c62a 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -1791,29 +1791,28 @@ static void hsw_crtc_disable(struct
> intel_atomic_state *state,
>  	const struct intel_crtc_state *old_crtc_state =
>  		intel_atomic_get_old_crtc_state(state, crtc);
>  	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
> +	struct intel_crtc *pipe_crtc;
> 
>  	/*
>  	 * FIXME collapse everything to one hook.
>  	 * Need care with mst->ddi interactions.
>  	 */
> -	if (!intel_crtc_is_bigjoiner_slave(old_crtc_state)) {
> -		intel_encoders_disable(state, crtc);
> -		intel_encoders_post_disable(state, crtc);
> -	}
> -
> -	intel_disable_shared_dpll(old_crtc_state);
> +	intel_encoders_disable(state, crtc);
> +	intel_encoders_post_disable(state, crtc);
> 
> -	if (!intel_crtc_is_bigjoiner_slave(old_crtc_state)) {
> -		struct intel_crtc *slave_crtc;
> +	for_each_intel_crtc_in_pipe_mask(&i915->drm, pipe_crtc,
> +
> intel_crtc_joined_pipe_mask(old_crtc_state)) {
> +		const struct intel_crtc_state *old_pipe_crtc_state =
> +			intel_atomic_get_old_crtc_state(state, pipe_crtc);
> 
> -		intel_encoders_post_pll_disable(state, crtc);
> +		intel_disable_shared_dpll(old_pipe_crtc_state);
> +	}

As per the sequence is considered, should the pll be disabled prior to disabling the encoders and then followed by post_pll_disable?

Thanks and Regards,
Arun R Murthy
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