On Mon, 13 Dec 2021, Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx> wrote:
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>
> Expose FBC debugfs files for each crtc. These may or may not point
> to the same FBC instance depending on the platform.
>
> We leave the old global debugfs files in place until
> igt catches up to the new per-crtc approach.
>
> v2: Take a trip via intel_crtc_debugfs_add() (Jani)
>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> ---
> .../drm/i915/display/intel_display_debugfs.c | 7 +++--
> drivers/gpu/drm/i915/display/intel_fbc.c | 31 ++++++++++++-------
> drivers/gpu/drm/i915/display/intel_fbc.h | 1 +
> 3 files changed, 25 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> index 572445299b04..f4de004d470f 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> @@ -2402,6 +2402,9 @@ void intel_connector_debugfs_add(struct intel_connector *intel_connector)
> */
> void intel_crtc_debugfs_add(struct drm_crtc *crtc)
> {
> - if (crtc->debugfs_entry)
> - crtc_updates_add(crtc);
> + if (!crtc->debugfs_entry)
> + return;
I think this is probably unnecessary, but that's for another patch.
> +
> + crtc_updates_add(crtc);
> + intel_fbc_crtc_debugfs_add(to_intel_crtc(crtc));
> }
> diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
> index 53c93387710c..987ea4c4b5d0 100644
> --- a/drivers/gpu/drm/i915/display/intel_fbc.c
> +++ b/drivers/gpu/drm/i915/display/intel_fbc.c
> @@ -1798,25 +1798,32 @@ DEFINE_SIMPLE_ATTRIBUTE(intel_fbc_debugfs_false_color_fops,
> intel_fbc_debugfs_false_color_set,
> "%llu\n");
>
> -static void intel_fbc_debugfs_add(struct intel_fbc *fbc)
> +static void intel_fbc_debugfs_add(struct intel_fbc *fbc,
> + struct dentry *parent)
> {
> - struct drm_i915_private *i915 = fbc->i915;
> - struct drm_minor *minor = i915->drm.primary;
> -
> - debugfs_create_file("i915_fbc_status", 0444,
> - minor->debugfs_root, fbc,
> - &intel_fbc_debugfs_status_fops);
> + debugfs_create_file("i915_fbc_status", 0444, parent,
> + fbc, &intel_fbc_debugfs_status_fops);
>
> if (fbc->funcs->set_false_color)
> - debugfs_create_file("i915_fbc_false_color", 0644,
> - minor->debugfs_root, fbc,
> - &intel_fbc_debugfs_false_color_fops);
> + debugfs_create_file("i915_fbc_false_color", 0644, parent,
> + fbc, &intel_fbc_debugfs_false_color_fops);
> }
>
> +void intel_fbc_crtc_debugfs_add(struct intel_crtc *crtc)
> +{
> + struct intel_plane *plane = to_intel_plane(crtc->base.primary);
> +
> + if (plane->fbc)
> + intel_fbc_debugfs_add(plane->fbc, crtc->base.debugfs_entry);
> +}
> +
> +/* FIXME: remove this once igt is on board with per-crtc stuff */
> void intel_fbc_debugfs_register(struct drm_i915_private *i915)
> {
> - struct intel_fbc *fbc = i915->fbc[INTEL_FBC_A];
> + struct drm_minor *minor = i915->drm.primary;
> + struct intel_fbc *fbc;
>
> + fbc = i915->fbc[INTEL_FBC_A];
> if (fbc)
> - intel_fbc_debugfs_add(fbc);
> + intel_fbc_debugfs_add(fbc, minor->debugfs_root);
> }
> diff --git a/drivers/gpu/drm/i915/display/intel_fbc.h b/drivers/gpu/drm/i915/display/intel_fbc.h
> index 7b7631aec527..8c5a7339a27f 100644
> --- a/drivers/gpu/drm/i915/display/intel_fbc.h
> +++ b/drivers/gpu/drm/i915/display/intel_fbc.h
> @@ -42,6 +42,7 @@ void intel_fbc_flush(struct drm_i915_private *dev_priv,
> void intel_fbc_add_plane(struct intel_fbc *fbc, struct intel_plane *plane);
> void intel_fbc_handle_fifo_underrun_irq(struct drm_i915_private *i915);
> void intel_fbc_reset_underrun(struct drm_i915_private *i915);
> +void intel_fbc_crtc_debugfs_add(struct intel_crtc *crtc);
> void intel_fbc_debugfs_register(struct drm_i915_private *i915);
>
> #endif /* __INTEL_FBC_H__ */
--
Jani Nikula, Intel Open Source Graphics Center
