[Intel-xe] [PATCH 2/4] drm/i915/lnl: update FBC debugfs to include plane information

[Matt Roper]

On Mon, Aug 28, 2023 at 09:20:33AM +0300, Vinod Govindapillai wrote:
> In future platforms, FBC can be supported on planes other than

"future platforms" on a patch labelled "drm/i915/lnl" makes it sound
like this is something that shows up beyond LNL, which isn't really the
case.  The "future" is already here, so I'd drop the "lnl" part of the
subject and just say "With Xe2_LPD and beyond..."

> the primary plane. So update the debugfs entry for FBC status
> to have the plane ID included.
> 
> Signed-off-by: Vinod Govindapillai <vinod.govindapillai at intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_fbc.c | 14 +++++++++++---
>  1 file changed, 11 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
> index d36499d7e0be..45e205a0f740 100644
> --- a/drivers/gpu/drm/i915/display/intel_fbc.c
> +++ b/drivers/gpu/drm/i915/display/intel_fbc.c
> @@ -1837,7 +1837,9 @@ static int intel_fbc_debugfs_status_show(struct seq_file *m, void *unused)
>  	mutex_lock(&fbc->lock);
>  
>  	if (fbc->active) {
> -		seq_puts(m, "FBC enabled\n");
> +		seq_printf(m, "FBC enabled: [PLANE:%d:%s]\n",
> +			   fbc->state.plane->base.base.id,
> +			   fbc->state.plane->base.name);
>  		seq_printf(m, "Compressing: %s\n",
>  			   str_yes_no(intel_fbc_is_compressing(fbc)));
>  	} else {
> @@ -1910,10 +1912,16 @@ static void intel_fbc_debugfs_add(struct intel_fbc *fbc,
>  
>  void intel_fbc_crtc_debugfs_add(struct intel_crtc *crtc)
>  {
> -	struct intel_plane *plane = to_intel_plane(crtc->base.primary);
> +	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
> +	struct intel_plane *plane;
> +
> +	for_each_intel_plane(&i915->drm, plane) {

You can use for_each_intel_plane_on_crtc here to avoid the pipe check
below.


Matt

> +		if (!plane->fbc || plane->pipe != crtc->pipe)
> +			continue;
>  
> -	if (plane->fbc)
>  		intel_fbc_debugfs_add(plane->fbc, crtc->base.debugfs_entry);
> +		break;
> +	}
>  }
>  
>  /* FIXME: remove this once igt is on board with per-crtc stuff */
> -- 
> 2.34.1
> 

-- 
Matt Roper
Graphics Software Engineer
Linux GPU Platform Enablement
Intel Corporation